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authorJiri Kosina <jkosina@suse.cz>2013-01-29 10:48:30 +0100
committerJiri Kosina <jkosina@suse.cz>2013-01-29 10:48:30 +0100
commit617677295b53a40d0e54aac4cbbc216ffbc755dd (patch)
tree51b9e87213243ed5efff252c8e8d8fec4eebc588 /arch/xtensa
parent5c8d1b68e01a144813e38795fe6dbe7ebb506131 (diff)
parent6abb7c25775b7fb2225ad0508236d63ca710e65f (diff)
Merge branch 'master' into for-next
Conflicts: drivers/devfreq/exynos4_bus.c Sync with Linus' tree to be able to apply patches that are against newer code (mvneta).
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/Kconfig22
-rw-r--r--arch/xtensa/Kconfig.debug22
-rw-r--r--arch/xtensa/Makefile20
-rw-r--r--arch/xtensa/boot/Makefile25
-rw-r--r--arch/xtensa/boot/boot-elf/Makefile26
-rw-r--r--arch/xtensa/boot/boot-redboot/Makefile26
-rw-r--r--arch/xtensa/boot/boot-uboot/Makefile14
-rw-r--r--arch/xtensa/boot/dts/lx60.dts11
-rw-r--r--arch/xtensa/boot/dts/ml605.dts11
-rw-r--r--arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi26
-rw-r--r--arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi18
-rw-r--r--arch/xtensa/boot/dts/xtfpga.dtsi56
-rw-r--r--arch/xtensa/include/asm/Kbuild1
-rw-r--r--arch/xtensa/include/asm/atomic.h271
-rw-r--r--arch/xtensa/include/asm/barrier.h6
-rw-r--r--arch/xtensa/include/asm/bitops.h127
-rw-r--r--arch/xtensa/include/asm/bootparam.h20
-rw-r--r--arch/xtensa/include/asm/cacheasm.h1
-rw-r--r--arch/xtensa/include/asm/cacheflush.h3
-rw-r--r--arch/xtensa/include/asm/checksum.h19
-rw-r--r--arch/xtensa/include/asm/cmpxchg.h74
-rw-r--r--arch/xtensa/include/asm/current.h2
-rw-r--r--arch/xtensa/include/asm/delay.h7
-rw-r--r--arch/xtensa/include/asm/dma-mapping.h6
-rw-r--r--arch/xtensa/include/asm/elf.h10
-rw-r--r--arch/xtensa/include/asm/highmem.h1
-rw-r--r--arch/xtensa/include/asm/initialize_mmu.h55
-rw-r--r--arch/xtensa/include/asm/io.h4
-rw-r--r--arch/xtensa/include/asm/mmu.h2
-rw-r--r--arch/xtensa/include/asm/mmu_context.h2
-rw-r--r--arch/xtensa/include/asm/nommu.h3
-rw-r--r--arch/xtensa/include/asm/nommu_context.h2
-rw-r--r--arch/xtensa/include/asm/page.h20
-rw-r--r--arch/xtensa/include/asm/pci-bridge.h2
-rw-r--r--arch/xtensa/include/asm/pci.h2
-rw-r--r--arch/xtensa/include/asm/pgalloc.h2
-rw-r--r--arch/xtensa/include/asm/pgtable.h8
-rw-r--r--arch/xtensa/include/asm/platform.h1
-rw-r--r--arch/xtensa/include/asm/processor.h14
-rw-r--r--arch/xtensa/include/asm/prom.h6
-rw-r--r--arch/xtensa/include/asm/ptrace.h6
-rw-r--r--arch/xtensa/include/asm/regs.h5
-rw-r--r--arch/xtensa/include/asm/signal.h1
-rw-r--r--arch/xtensa/include/asm/spinlock.h188
-rw-r--r--arch/xtensa/include/asm/syscall.h13
-rw-r--r--arch/xtensa/include/asm/traps.h23
-rw-r--r--arch/xtensa/include/asm/uaccess.h43
-rw-r--r--arch/xtensa/include/asm/unistd.h15
-rw-r--r--arch/xtensa/include/uapi/asm/ioctls.h3
-rw-r--r--arch/xtensa/include/uapi/asm/mman.h11
-rw-r--r--arch/xtensa/include/uapi/asm/signal.h6
-rw-r--r--arch/xtensa/include/uapi/asm/socket.h1
-rw-r--r--arch/xtensa/include/uapi/asm/unistd.h18
-rw-r--r--arch/xtensa/kernel/Makefile8
-rw-r--r--arch/xtensa/kernel/align.S4
-rw-r--r--arch/xtensa/kernel/asm-offsets.c5
-rw-r--r--arch/xtensa/kernel/coprocessor.S25
-rw-r--r--arch/xtensa/kernel/entry.S122
-rw-r--r--arch/xtensa/kernel/head.S21
-rw-r--r--arch/xtensa/kernel/irq.c132
-rw-r--r--arch/xtensa/kernel/module.c2
-rw-r--r--arch/xtensa/kernel/platform.c1
-rw-r--r--arch/xtensa/kernel/process.c138
-rw-r--r--arch/xtensa/kernel/ptrace.c3
-rw-r--r--arch/xtensa/kernel/setup.c279
-rw-r--r--arch/xtensa/kernel/signal.c8
-rw-r--r--arch/xtensa/kernel/syscall.c8
-rw-r--r--arch/xtensa/kernel/time.c7
-rw-r--r--arch/xtensa/kernel/traps.c18
-rw-r--r--arch/xtensa/kernel/vectors.S67
-rw-r--r--arch/xtensa/kernel/xtensa_ksyms.c1
-rw-r--r--arch/xtensa/lib/checksum.S15
-rw-r--r--arch/xtensa/lib/memcopy.S6
-rw-r--r--arch/xtensa/lib/pci-auto.c9
-rw-r--r--arch/xtensa/lib/strncpy_user.S4
-rw-r--r--arch/xtensa/lib/strnlen_user.S1
-rw-r--r--arch/xtensa/lib/usercopy.S1
-rw-r--r--arch/xtensa/mm/cache.c27
-rw-r--r--arch/xtensa/mm/fault.c1
-rw-r--r--arch/xtensa/mm/init.c16
-rw-r--r--arch/xtensa/mm/misc.S51
-rw-r--r--arch/xtensa/mm/mmu.c2
-rw-r--r--arch/xtensa/mm/tlb.c9
-rw-r--r--arch/xtensa/platforms/iss/console.c1
-rw-r--r--arch/xtensa/platforms/iss/include/platform/serial.h15
-rw-r--r--arch/xtensa/platforms/iss/include/platform/simcall.h7
-rw-r--r--arch/xtensa/platforms/xtfpga/Makefile9
-rw-r--r--arch/xtensa/platforms/xtfpga/include/platform/hardware.h69
-rw-r--r--arch/xtensa/platforms/xtfpga/include/platform/lcd.h20
-rw-r--r--arch/xtensa/platforms/xtfpga/include/platform/serial.h18
-rw-r--r--arch/xtensa/platforms/xtfpga/lcd.c76
-rw-r--r--arch/xtensa/platforms/xtfpga/setup.c301
-rw-r--r--arch/xtensa/variants/s6000/gpio.c4
93 files changed, 2217 insertions, 575 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 530f18018d0..68f172948a3 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -14,6 +14,8 @@ config XTENSA
select MODULES_USE_ELF_RELA
select GENERIC_PCI_IOMAP
select ARCH_WANT_OPTIONAL_GPIOLIB
+ select CLONE_BACKWARDS
+ select IRQ_DOMAIN
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
primarily for embedded systems. These processors are both
@@ -147,6 +149,15 @@ config XTENSA_PLATFORM_S6105
select SERIAL_CONSOLE
select NO_IOPORT
+config XTENSA_PLATFORM_XTFPGA
+ bool "XTFPGA"
+ select SERIAL_CONSOLE
+ select ETHOC
+ select XTENSA_CALIBRATE_CCOUNT
+ help
+ XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
+ This hardware is capable of running a full Linux distribution.
+
endchoice
@@ -174,6 +185,17 @@ config CMDLINE
time by entering them here. As a minimum, you should specify the
memory size and the root device (e.g., mem=64M root=/dev/nfs).
+config USE_OF
+ bool "Flattened Device Tree support"
+ select OF
+ select OF_EARLY_FLATTREE
+ help
+ Include support for flattened device tree machine descriptions.
+
+config BUILTIN_DTB
+ string "DTB to build into the kernel image"
+ depends on OF
+
source "mm/Kconfig"
source "drivers/pcmcia/Kconfig"
diff --git a/arch/xtensa/Kconfig.debug b/arch/xtensa/Kconfig.debug
index 11c585295dd..a34010e0e51 100644
--- a/arch/xtensa/Kconfig.debug
+++ b/arch/xtensa/Kconfig.debug
@@ -2,6 +2,26 @@ menu "Kernel hacking"
source "lib/Kconfig.debug"
-endmenu
+config LD_NO_RELAX
+ bool "Disable linker relaxation"
+ default n
+ help
+ Enable this function to disable link-time optimizations.
+ The default linker behavior is to combine identical literal
+ values to reduce code size and remove unnecessary overhead from
+ assembler-generated 'longcall' sequences.
+ Enabling this option improves the link time but increases the
+ code size, and possibly execution time.
+
+config S32C1I_SELFTEST
+ bool "Perform S32C1I instruction self-test at boot"
+ default y
+ help
+ Enable this option to test S32C1I instruction behavior at boot.
+ Correct operation of this instruction requires some cooperation from hardware
+ external to the processor (such as bus bridge, bus fabric, or memory controller).
+ It is easy to make wrong hardware configuration, this test should catch it early.
+ Say 'N' on stable hardware.
+endmenu
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index bb5ba61723f..0aa72702f17 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -38,6 +38,7 @@ endif
platform-$(CONFIG_XTENSA_PLATFORM_XT2000) := xt2000
platform-$(CONFIG_XTENSA_PLATFORM_ISS) := iss
platform-$(CONFIG_XTENSA_PLATFORM_S6105) := s6105
+platform-$(CONFIG_XTENSA_PLATFORM_XTFPGA) := xtfpga
PLATFORM = $(platform-y)
export PLATFORM
@@ -49,6 +50,17 @@ KBUILD_CFLAGS += -pipe -mlongcalls
KBUILD_CFLAGS += $(call cc-option,-mforce-no-pic,)
+ifneq ($(CONFIG_LD_NO_RELAX),)
+LDFLAGS := --no-relax
+endif
+
+ifeq ($(shell echo -e __XTENSA_EB__ | $(CC) -E - | grep -v "\#"),1)
+CHECKFLAGS += -D__XTENSA_EB__
+endif
+ifeq ($(shell echo -e __XTENSA_EL__ | $(CC) -E - | grep -v "\#"),1)
+CHECKFLAGS += -D__XTENSA_EL__
+endif
+
vardirs := $(patsubst %,arch/xtensa/variants/%/,$(variant-y))
plfdirs := $(patsubst %,arch/xtensa/platforms/%/,$(platform-y))
@@ -75,6 +87,10 @@ core-y += $(buildvar) $(buildplf)
libs-y += arch/xtensa/lib/ $(LIBGCC)
+ifneq ($(CONFIG_BUILTIN_DTB),"")
+core-$(CONFIG_OF) += arch/xtensa/boot/
+endif
+
boot := arch/xtensa/boot
all: zImage
@@ -84,7 +100,9 @@ bzImage : zImage
zImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $@
+%.dtb:
+ $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+
define archhelp
@echo '* zImage - Compressed kernel image (arch/xtensa/boot/images/zImage.*)'
endef
-
diff --git a/arch/xtensa/boot/Makefile b/arch/xtensa/boot/Makefile
index 4018f899419..818647e815d 100644
--- a/arch/xtensa/boot/Makefile
+++ b/arch/xtensa/boot/Makefile
@@ -22,12 +22,35 @@ subdir-y := lib
# Subdirs for the boot loader(s)
bootdir-$(CONFIG_XTENSA_PLATFORM_ISS) += boot-elf
-bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf
+bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf boot-uboot
+bootdir-$(CONFIG_XTENSA_PLATFORM_XTFPGA) += boot-redboot boot-elf boot-uboot
+BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_BUILTIN_DTB)).dtb.o
+ifneq ($(CONFIG_BUILTIN_DTB),"")
+obj-$(CONFIG_OF) += $(BUILTIN_DTB)
+endif
+
+# Rule to build device tree blobs
+$(obj)/%.dtb: $(src)/dts/%.dts FORCE
+ $(call if_changed_dep,dtc)
+
+clean-files := *.dtb.S
+
zImage Image: $(bootdir-y)
$(bootdir-y): $(addprefix $(obj)/,$(subdir-y)) \
$(addprefix $(obj)/,$(host-progs))
$(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS)
+OBJCOPYFLAGS = --strip-all -R .comment -R .note.gnu.build-id -O binary
+
+vmlinux.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+vmlinux.bin.gz: vmlinux.bin FORCE
+ $(call if_changed,gzip)
+
+boot-elf: vmlinux.bin
+boot-redboot: vmlinux.bin.gz
+boot-uboot: vmlinux.bin.gz
diff --git a/arch/xtensa/boot/boot-elf/Makefile b/arch/xtensa/boot/boot-elf/Makefile
index f10992b8902..1fe01b78c12 100644
--- a/arch/xtensa/boot/boot-elf/Makefile
+++ b/arch/xtensa/boot/boot-elf/Makefile
@@ -4,9 +4,6 @@
# for more details.
#
-GZIP = gzip
-GZIP_FLAGS = -v9fc
-
ifeq ($(BIG_ENDIAN),1)
OBJCOPY_ARGS := -O elf32-xtensa-be
else
@@ -20,18 +17,17 @@ boot-y := bootstrap.o
OBJS := $(addprefix $(obj)/,$(boot-y))
-vmlinux.tmp: vmlinux
- $(OBJCOPY) --strip-all -R .comment -R .note.gnu.build-id -O binary \
- $^ $@
-
-Image: vmlinux.tmp $(OBJS) arch/$(ARCH)/boot/boot-elf/boot.lds
- $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
- --add-section image=vmlinux.tmp \
+$(obj)/Image.o: vmlinux.bin $(OBJS)
+ $(Q)$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+ --add-section image=vmlinux.bin \
--set-section-flags image=contents,alloc,load,load,data \
- $(OBJS) $@.tmp
- $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
- -T arch/$(ARCH)/boot/boot-elf/boot.lds \
- -o arch/$(ARCH)/boot/$@.elf $@.tmp
+ $(OBJS) $@
-zImage: Image
+$(obj)/../Image.elf: $(obj)/Image.o $(obj)/boot.lds
+ $(Q)$(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
+ -T $(obj)/boot.lds \
+ --build-id=none \
+ -o $@ $(obj)/Image.o
+ $(Q)$(kecho) ' Kernel: $@ is ready'
+zImage: $(obj)/../Image.elf
diff --git a/arch/xtensa/boot/boot-redboot/Makefile b/arch/xtensa/boot/boot-redboot/Makefile
index 25a78c6b153..8be8b943698 100644
--- a/arch/xtensa/boot/boot-redboot/Makefile
+++ b/arch/xtensa/boot/boot-redboot/Makefile
@@ -4,8 +4,6 @@
# for more details.
#
-GZIP = gzip
-GZIP_FLAGS = -v9fc
ifeq ($(BIG_ENDIAN),1)
OBJCOPY_ARGS := -O elf32-xtensa-be
else
@@ -21,17 +19,17 @@ LIBS := arch/xtensa/boot/lib/lib.a arch/xtensa/lib/lib.a
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
-vmlinux.tmp: vmlinux
- $(OBJCOPY) --strip-all -R .comment -R .note.gnu.build-id -O binary \
- $^ $@
+$(obj)/zImage.o: vmlinux.bin.gz $(OBJS)
+ $(Q)$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+ --add-section image=vmlinux.bin.gz \
+ --set-section-flags image=contents,alloc,load,load,data \
+ $(OBJS) $@
-vmlinux.tmp.gz: vmlinux.tmp
- $(GZIP) $(GZIP_FLAGS) $^ > $@
+$(obj)/zImage.elf: $(obj)/zImage.o $(LIBS)
+ $(Q)$(LD) $(LD_ARGS) -o $@ $^ -L/xtensa-elf/lib $(LIBGCC)
-zImage: vmlinux.tmp.gz $(OBJS) $(LIBS)
- $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
- --add-section image=vmlinux.tmp.gz \
- --set-section-flags image=contents,alloc,load,load,data \
- $(OBJS) $@.tmp
- $(LD) $(LD_ARGS) -o $@.elf $@.tmp $(LIBS) -L/xtensa-elf/lib $(LIBGCC)
- $(OBJCOPY) -S -O binary $@.elf arch/$(ARCH)/boot/$@.redboot
+$(obj)/../zImage.redboot: $(obj)/zImage.elf
+ $(Q)$(OBJCOPY) -S -O binary $< $@
+ $(Q)$(kecho) ' Kernel: $@ is ready'
+
+zImage: $(obj)/../zImage.redboot
diff --git a/arch/xtensa/boot/boot-uboot/Makefile b/arch/xtensa/boot/boot-uboot/Makefile
new file mode 100644
index 00000000000..bfbf8af582f
--- /dev/null
+++ b/arch/xtensa/boot/boot-uboot/Makefile
@@ -0,0 +1,14 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+UIMAGE_LOADADDR = 0xd0001000
+UIMAGE_COMPRESSION = gzip
+
+$(obj)/../uImage: vmlinux.bin.gz FORCE
+ $(call if_changed,uimage)
+ $(Q)$(kecho) ' Kernel: $@ is ready'
+
+zImage: $(obj)/../uImage
diff --git a/arch/xtensa/boot/dts/lx60.dts b/arch/xtensa/boot/dts/lx60.dts
new file mode 100644
index 00000000000..2eab3658e1b
--- /dev/null
+++ b/arch/xtensa/boot/dts/lx60.dts
@@ -0,0 +1,11 @@
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-4m.dtsi"
+
+/ {
+ compatible = "xtensa,lx60";
+ memory@0 {
+ device_type = "memory";
+ reg = <0x00000000 0x04000000>;
+ };
+};
diff --git a/arch/xtensa/boot/dts/ml605.dts b/arch/xtensa/boot/dts/ml605.dts
new file mode 100644
index 00000000000..6ed51d6554e
--- /dev/null
+++ b/arch/xtensa/boot/dts/ml605.dts
@@ -0,0 +1,11 @@
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-16m.dtsi"
+
+/ {
+ compatible = "xtensa,ml605";
+ memory@0 {
+ device_type = "memory";
+ reg = <0x00000000 0x08000000>;
+ };
+};
diff --git a/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi b/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi
new file mode 100644
index 00000000000..e5703c7beeb
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi
@@ -0,0 +1,26 @@
+/ {
+ flash: flash@f8000000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "cfi-flash";
+ reg = <0xf8000000 0x01000000>;
+ bank-width = <2>;
+ device-width = <2>;
+ partition@0x0 {
+ label = "boot loader area";
+ reg = <0x00000000 0x00400000>;
+ };
+ partition@0x400000 {
+ label = "kernel image";
+ reg = <0x00400000 0x00600000>;
+ };
+ partition@0xa00000 {
+ label = "data";
+ reg = <0x00a00000 0x005e0000>;
+ };
+ partition@0xfe0000 {
+ label = "boot environment";
+ reg = <0x00fe0000 0x00020000>;
+ };
+ };
+};
diff --git a/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi b/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
new file mode 100644
index 00000000000..6f9c10d6b68
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
@@ -0,0 +1,18 @@
+/ {
+ flash: flash@f8000000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "cfi-flash";
+ reg = <0xf8000000 0x00400000>;
+ bank-width = <2>;
+ device-width = <2>;
+ partition@0x0 {
+ label = "boot loader area";
+ reg = <0x00000000 0x003f0000>;
+ };
+ partition@0x3f0000 {
+ label = "boot environment";
+ reg = <0x003f0000 0x00010000>;
+ };
+ };
+};
diff --git a/arch/xtensa/boot/dts/xtfpga.dtsi b/arch/xtensa/boot/dts/xtfpga.dtsi
new file mode 100644
index 00000000000..7eda6ecf7ee
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga.dtsi
@@ -0,0 +1,56 @@
+/ {
+ compatible = "xtensa,xtfpga";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&pic>;
+
+ chosen {
+ bootargs = "earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug";
+ };
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x00000000 0x06000000>;
+ };
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cpu@0 {
+ compatible = "xtensa,cpu";
+ reg = <0>;
+ /* Filled in by platform_setup from FPGA register
+ * clock-frequency = <100000000>;
+ */
+ };
+ };
+
+ pic: pic {
+ compatible = "xtensa,pic";
+ /* one cell: internal irq number,
+ * two cells: second cell == 0: internal irq number
+ * second cell == 1: external irq number
+ */
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ };
+
+ serial0: serial@fd050020 {
+ device_type = "serial";
+ compatible = "ns16550a";
+ no-loopback-test;
+ reg = <0xfd050020 0x20>;
+ reg-shift = <2>;
+ interrupts = <0 1>; /* external irq 0 */
+ /* Filled in by platform_setup from FPGA register
+ * clock-frequency = <100000000>;
+ */
+ };
+
+ enet0: ethoc@fd030000 {
+ compatible = "opencores,ethoc";
+ reg = <0xfd030000 0x4000 0xfd800000 0x4000>;
+ interrupts = <1 1>; /* external irq 1 */
+ local-mac-address = [00 50 c2 13 6f 00];
+ };
+};
diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild
index 6d130278999..095f0a2244f 100644
--- a/arch/xtensa/include/asm/Kbuild
+++ b/arch/xtensa/include/asm/Kbuild
@@ -25,4 +25,5 @@ generic-y += siginfo.h
generic-y += statfs.h
generic-y += termios.h
generic-y += topology.h
+generic-y += trace_clock.h
generic-y += xor.h
diff --git a/arch/xtensa/include/asm/atomic.h b/arch/xtensa/include/asm/atomic.h
index 24f50cada70..c3f289174c1 100644
--- a/arch/xtensa/include/asm/atomic.h
+++ b/arch/xtensa/include/asm/atomic.h
@@ -66,19 +66,35 @@
*/
static inline void atomic_add(int i, atomic_t * v)
{
- unsigned int vval;
-
- __asm__ __volatile__(
- "rsil a15, "__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %2, 0 \n\t"
- "add %0, %0, %1 \n\t"
- "s32i %0, %2, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n"
- : "=&a" (vval)
- : "a" (i), "a" (v)
- : "a15", "memory"
- );
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp;
+ int result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " add %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (i), "a" (v)
+ : "memory"
+ );
+#else
+ unsigned int vval;
+
+ __asm__ __volatile__(
+ " rsil a15, "__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %2, 0\n"
+ " add %0, %0, %1\n"
+ " s32i %0, %2, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (vval)
+ : "a" (i), "a" (v)
+ : "a15", "memory"
+ );
+#endif
}
/**
@@ -90,19 +106,35 @@ static inline void atomic_add(int i, atomic_t * v)
*/
static inline void atomic_sub(int i, atomic_t *v)
{
- unsigned int vval;
-
- __asm__ __volatile__(
- "rsil a15, "__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %2, 0 \n\t"
- "sub %0, %0, %1 \n\t"
- "s32i %0, %2, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n"
- : "=&a" (vval)
- : "a" (i), "a" (v)
- : "a15", "memory"
- );
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp;
+ int result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " sub %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (i), "a" (v)
+ : "memory"
+ );
+#else
+ unsigned int vval;
+
+ __asm__ __volatile__(
+ " rsil a15, "__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %2, 0\n"
+ " sub %0, %0, %1\n"
+ " s32i %0, %2, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (vval)
+ : "a" (i), "a" (v)
+ : "a15", "memory"
+ );
+#endif
}
/*
@@ -111,40 +143,78 @@ static inline void atomic_sub(int i, atomic_t *v)
static inline int atomic_add_return(int i, atomic_t * v)
{
- unsigned int vval;
-
- __asm__ __volatile__(
- "rsil a15,"__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %2, 0 \n\t"
- "add %0, %0, %1 \n\t"
- "s32i %0, %2, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n"
- : "=&a" (vval)
- : "a" (i), "a" (v)
- : "a15", "memory"
- );
-
- return vval;
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp;
+ int result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " add %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ " add %0, %0, %2\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (i), "a" (v)
+ : "memory"
+ );
+
+ return result;
+#else
+ unsigned int vval;
+
+ __asm__ __volatile__(
+ " rsil a15,"__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %2, 0\n"
+ " add %0, %0, %1\n"
+ " s32i %0, %2, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (vval)
+ : "a" (i), "a" (v)
+ : "a15", "memory"
+ );
+
+ return vval;
+#endif
}
static inline int atomic_sub_return(int i, atomic_t * v)
{
- unsigned int vval;
-
- __asm__ __volatile__(
- "rsil a15,"__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %2, 0 \n\t"
- "sub %0, %0, %1 \n\t"
- "s32i %0, %2, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n"
- : "=&a" (vval)
- : "a" (i), "a" (v)
- : "a15", "memory"
- );
-
- return vval;
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp;
+ int result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " sub %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ " sub %0, %0, %2\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (i), "a" (v)
+ : "memory"
+ );
+
+ return result;
+#else
+ unsigned int vval;
+
+ __asm__ __volatile__(
+ " rsil a15,"__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %2, 0\n"
+ " sub %0, %0, %1\n"
+ " s32i %0, %2, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (vval)
+ : "a" (i), "a" (v)
+ : "a15", "memory"
+ );
+
+ return vval;
+#endif
}
/**
@@ -251,38 +321,70 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
- unsigned int all_f = -1;
- unsigned int vval;
-
- __asm__ __volatile__(
- "rsil a15,"__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %2, 0 \n\t"
- "xor %1, %4, %3 \n\t"
- "and %0, %0, %4 \n\t"
- "s32i %0, %2, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n"
- : "=&a" (vval), "=a" (mask)
- : "a" (v), "a" (all_f), "1" (mask)
- : "a15", "memory"
- );
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp;
+ int result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " and %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (~mask), "a" (v)
+ : "memory"
+ );
+#else
+ unsigned int all_f = -1;
+ unsigned int vval;
+
+ __asm__ __volatile__(
+ " rsil a15,"__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %2, 0\n"
+ " xor %1, %4, %3\n"
+ " and %0, %0, %4\n"
+ " s32i %0, %2, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (vval), "=a" (mask)
+ : "a" (v), "a" (all_f), "1" (mask)
+ : "a15", "memory"
+ );
+#endif
}
static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
- unsigned int vval;
-
- __asm__ __volatile__(
- "rsil a15,"__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %2, 0 \n\t"
- "or %0, %0, %1 \n\t"
- "s32i %0, %2, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n"
- : "=&a" (vval)
- : "a" (mask), "a" (v)
- : "a15", "memory"
- );
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp;
+ int result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " or %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (mask), "a" (v)
+ : "memory"
+ );
+#else
+ unsigned int vval;
+
+ __asm__ __volatile__(
+ " rsil a15,"__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %2, 0\n"
+ " or %0, %0, %1\n"
+ " s32i %0, %2, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (vval)
+ : "a" (mask), "a" (v)
+ : "a15", "memory"
+ );
+#endif
}
/* Atomic operations are already serializing */
@@ -294,4 +396,3 @@ static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
#endif /* __KERNEL__ */
#endif /* _XTENSA_ATOMIC_H */
-
diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h
index 55707a8009d..ef021677d53 100644
--- a/arch/xtensa/include/asm/barrier.h
+++ b/arch/xtensa/include/asm/barrier.h
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2012 Tensilica Inc.
*/
#ifndef _XTENSA_SYSTEM_H
@@ -12,8 +12,8 @@
#define smp_read_barrier_depends() do { } while(0)
#define read_barrier_depends() do { } while(0)
-#define mb() barrier()
-#define rmb() mb()
+#define mb() ({ __asm__ __volatile__("memw" : : : "memory"); })
+#define rmb() barrier()
#define wmb() mb()
#ifdef CONFIG_SMP
diff --git a/arch/xtensa/include/asm/bitops.h b/arch/xtensa/include/asm/bitops.h
index 5270197ddd3..84afe58d5d3 100644
--- a/arch/xtensa/include/asm/bitops.h
+++ b/arch/xtensa/include/asm/bitops.h
@@ -29,7 +29,6 @@
#define smp_mb__before_clear_bit() barrier()
#define smp_mb__after_clear_bit() barrier()
-#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>
#if XCHAL_HAVE_NSA
@@ -104,6 +103,132 @@ static inline unsigned long __fls(unsigned long word)
#endif
#include <asm-generic/bitops/fls64.h>
+
+#if XCHAL_HAVE_S32C1I
+
+static inline void set_bit(unsigned int bit, volatile unsigned long *p)
+{
+ unsigned long tmp, value;
+ unsigned long mask = 1UL << (bit & 31);
+
+ p += bit >> 5;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " or %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp), "=&a" (value)
+ : "a" (mask), "a" (p)
+ : "memory");
+}
+
+static inline void clear_bit(unsigned int bit, volatile unsigned long *p)
+{
+ unsigned long tmp, value;
+ unsigned long mask = 1UL << (bit & 31);
+
+ p += bit >> 5;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " and %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp), "=&a" (value)
+ : "a" (~mask), "a" (p)
+ : "memory");
+}
+
+static inline void change_bit(unsigned int bit, volatile unsigned long *p)
+{
+ unsigned long tmp, value;
+ unsigned long mask = 1UL << (bit & 31);
+
+ p += bit >> 5;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " xor %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp), "=&a" (value)
+ : "a" (mask), "a" (p)
+ : "memory");
+}
+
+static inline int
+test_and_set_bit(unsigned int bit, volatile unsigned long *p)
+{
+ unsigned long tmp, value;
+ unsigned long mask = 1UL << (bit & 31);
+
+ p += bit >> 5;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " or %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp), "=&a" (value)
+ : "a" (mask), "a" (p)
+ : "memory");
+
+ return tmp & mask;
+}
+
+static inline int
+test_and_clear_bit(unsigned int bit, volatile unsigned long *p)
+{
+ unsigned long tmp, value;
+ unsigned long mask = 1UL << (bit & 31);
+
+ p += bit >> 5;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " and %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp), "=&a" (value)
+ : "a" (~mask), "a" (p)
+ : "memory");
+
+ return tmp & mask;
+}
+
+static inline int
+test_and_change_bit(unsigned int bit, volatile unsigned long *p)
+{
+ unsigned long tmp, value;
+ unsigned long mask = 1UL << (bit & 31);
+
+ p += bit >> 5;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %3, 0\n"
+ " wsr %1, scompare1\n"
+ " xor %0, %1, %2\n"
+ " s32c1i %0, %3, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp), "=&a" (value)
+ : "a" (mask), "a" (p)
+ : "memory");
+
+ return tmp & mask;
+}
+
+#else
+
+#include <asm-generic/bitops/atomic.h>
+
+#endif /* XCHAL_HAVE_S32C1I */
+
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/le.h>
diff --git a/arch/xtensa/include/asm/bootparam.h b/arch/xtensa/include/asm/bootparam.h
index 9983f2c1b7e..0c25799faca 100644
--- a/arch/xtensa/include/asm/bootparam.h
+++ b/arch/xtensa/include/asm/bootparam.h
@@ -22,6 +22,7 @@
#define BP_TAG_MEMORY 0x1003 /* memory addr and size (bp_meminfo) */
#define BP_TAG_SERIAL_BAUSRATE 0x1004 /* baud rate of current console. */
#define BP_TAG_SERIAL_PORT 0x1005 /* serial device of current console */
+#define BP_TAG_FDT 0x1006 /* flat device tree addr */
#define BP_TAG_FIRST 0x7B0B /* first tag with a version number */
#define BP_TAG_LAST 0x7E0B /* last tag */
@@ -31,15 +32,15 @@
/* All records are aligned to 4 bytes */
typedef struct bp_tag {
- unsigned short id; /* tag id */
- unsigned short size; /* size of this record excluding the structure*/
- unsigned long data[0]; /* data */
+ unsigned short id; /* tag id */
+ unsigned short size; /* size of this record excluding the structure*/
+ unsigned long data[0]; /* data */
} bp_tag_t;
typedef struct meminfo {
- unsigned long type;
- unsigned long start;
- unsigned long end;
+ unsigned long type;
+ unsigned long start;
+ unsigned long end;
} meminfo_t;
#define SYSMEM_BANKS_MAX 5
@@ -48,14 +49,11 @@ typedef struct meminfo {
#define MEMORY_TYPE_NONE 0x2000
typedef struct sysmem_info {
- int nr_banks;
- meminfo_t bank[SYSMEM_BANKS_MAX];
+ int nr_banks;
+ meminfo_t bank[SYSMEM_BANKS_MAX];
} sysmem_info_t;
extern sysmem_info_t sysmem;
#endif
#endif
-
-
-
diff --git a/arch/xtensa/include/asm/cacheasm.h b/arch/xtensa/include/asm/cacheasm.h
index 2c20a58f94c..60e18773ecb 100644
--- a/arch/xtensa/include/asm/cacheasm.h
+++ b/arch/xtensa/include/asm/cacheasm.h
@@ -174,4 +174,3 @@
__loop_cache_page \ar \as ihi XCHAL_ICACHE_LINEWIDTH
.endm
-
diff --git a/arch/xtensa/include/asm/cacheflush.h b/arch/xtensa/include/asm/cacheflush.h
index 569fec4f9a2..127cd48883c 100644
--- a/arch/xtensa/include/asm/cacheflush.h
+++ b/arch/xtensa/include/asm/cacheflush.h
@@ -104,7 +104,8 @@ static inline void __invalidate_icache_page_alias(unsigned long virt,
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page*);
extern void flush_cache_range(struct vm_area_struct*, ulong, ulong);
-extern void flush_cache_page(struct vm_area_struct*, unsigned long, unsigned long);
+extern void flush_cache_page(struct vm_area_struct*,
+ unsigned long, unsigned long);
#else
diff --git a/arch/xtensa/include/asm/checksum.h b/arch/xtensa/include/asm/checksum.h
index e4d831a3077..aed7ad68ca4 100644
--- a/arch/xtensa/include/asm/checksum.h
+++ b/arch/xtensa/include/asm/checksum.h
@@ -36,8 +36,9 @@ asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
* better 64-bit) boundary
*/
-asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst, int len, __wsum sum,
- int *src_err_ptr, int *dst_err_ptr);
+asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst,
+ int len, __wsum sum,
+ int *src_err_ptr, int *dst_err_ptr);
/*
* Note: when you get a NULL pointer exception here this means someone
@@ -54,7 +55,7 @@ __wsum csum_partial_copy_nocheck(const void *src, void *dst,
static inline
__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
- int len, __wsum sum, int *err_ptr)
+ int len, __wsum sum, int *err_ptr)
{
return csum_partial_copy_generic((__force const void *)src, dst,
len, sum, err_ptr, NULL);
@@ -112,7 +113,8 @@ static __inline__ __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
/* Since the input registers which are loaded with iph and ihl
are modified, we must also specify them as outputs, or gcc
will assume they contain their original values. */
- : "=r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmp), "=&r" (endaddr)
+ : "=r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmp),
+ "=&r" (endaddr)
: "1" (iph), "2" (ihl)
: "memory");
@@ -168,7 +170,7 @@ static __inline__ __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
static __inline__ __sum16 ip_compute_csum(const void *buff, int len)
{
- return csum_fold (csum_partial(buff, len, 0));
+ return csum_fold (csum_partial(buff, len, 0));
}
#define _HAVE_ARCH_IPV6_CSUM
@@ -238,11 +240,12 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
* Copy and checksum to user
*/
#define HAVE_CSUM_COPY_USER
-static __inline__ __wsum csum_and_copy_to_user(const void *src, void __user *dst,
- int len, __wsum sum, int *err_ptr)
+static __inline__ __wsum csum_and_copy_to_user(const void *src,
+ void __user *dst, int len,
+ __wsum sum, int *err_ptr)
{
if (access_ok(VERIFY_WRITE, dst, len))
- return csum_partial_copy_generic(src, dst, len, sum, NULL, err_ptr);
+ return csum_partial_copy_generic(src,dst,len,sum,NULL,err_ptr);
if (len)
*err_ptr = -EFAULT;
diff --git a/arch/xtensa/include/asm/cmpxchg.h b/arch/xtensa/include/asm/cmpxchg.h
index 64dad04a9d2..d9ab131bc1a 100644
--- a/arch/xtensa/include/asm/cmpxchg.h
+++ b/arch/xtensa/include/asm/cmpxchg.h
@@ -22,17 +22,30 @@
static inline unsigned long
__cmpxchg_u32(volatile int *p, int old, int new)
{
- __asm__ __volatile__("rsil a15, "__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %1, 0 \n\t"
- "bne %0, %2, 1f \n\t"
- "s32i %3, %1, 0 \n\t"
- "1: \n\t"
- "wsr a15, ps \n\t"
- "rsync \n\t"
- : "=&a" (old)
- : "a" (p), "a" (old), "r" (new)
- : "a15", "memory");
- return old;
+#if XCHAL_HAVE_S32C1I
+ __asm__ __volatile__(
+ " wsr %2, scompare1\n"
+ " s32c1i %0, %1, 0\n"
+ : "+a" (new)
+ : "a" (p), "a" (old)
+ : "memory"
+ );
+
+ return new;
+#else
+ __asm__ __volatile__(
+ " rsil a15, "__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %1, 0\n"
+ " bne %0, %2, 1f\n"
+ " s32i %3, %1, 0\n"
+ "1:\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (old)
+ : "a" (p), "a" (old), "r" (new)
+ : "a15", "memory");
+ return old;
+#endif
}
/* This function doesn't exist, so you'll get a linker error
* if something tries to do an invalid cmpxchg(). */
@@ -93,19 +106,36 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
static inline unsigned long xchg_u32(volatile int * m, unsigned long val)
{
- unsigned long tmp;
- __asm__ __volatile__("rsil a15, "__stringify(LOCKLEVEL)"\n\t"
- "l32i %0, %1, 0 \n\t"
- "s32i %2, %1, 0 \n\t"
- "wsr a15, ps \n\t"
- "rsync \n\t"
- : "=&a" (tmp)
- : "a" (m), "a" (val)
- : "a15", "memory");
- return tmp;
+#if XCHAL_HAVE_S32C1I
+ unsigned long tmp, result;
+ __asm__ __volatile__(
+ "1: l32i %1, %2, 0\n"
+ " mov %0, %3\n"
+ " wsr %1, scompare1\n"
+ " s32c1i %0, %2, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (m), "a" (val)
+ : "memory"
+ );
+ return result;
+#else
+ unsigned long tmp;
+ __asm__ __volatile__(
+ " rsil a15, "__stringify(LOCKLEVEL)"\n"
+ " l32i %0, %1, 0\n"
+ " s32i %2, %1, 0\n"
+ " wsr a15, ps\n"
+ " rsync\n"
+ : "=&a" (tmp)
+ : "a" (m), "a" (val)
+ : "a15", "memory");
+ return tmp;
+#endif
}
-#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+#define xchg(ptr,x) \
+ ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
/*
* This only works if the compiler isn't horribly bad at optimizing.
diff --git a/arch/xtensa/include/asm/current.h b/arch/xtensa/include/asm/current.h
index 8d1eb5d7864..47e46dcf5d4 100644
--- a/arch/xtensa/include/asm/current.h
+++ b/arch/xtensa/include/asm/current.h
@@ -30,7 +30,7 @@ static inline struct task_struct *get_current(void)
#define GET_CURRENT(reg,sp) \
GET_THREAD_INFO(reg,sp); \
- l32i reg, reg, TI_TASK \
+ l32i reg, reg, TI_TASK \
#endif
diff --git a/arch/xtensa/include/asm/delay.h b/arch/xtensa/include/asm/delay.h
index 58c0a4fd400..61fc5faeb46 100644
--- a/arch/xtensa/include/asm/delay.h
+++ b/arch/xtensa/include/asm/delay.h
@@ -19,9 +19,9 @@ extern unsigned long loops_per_jiffy;
static inline void __delay(unsigned long loops)
{
- /* 2 cycles per loop. */
- __asm__ __volatile__ ("1: addi %0, %0, -2; bgeui %0, 2, 1b"
- : "=r" (loops) : "0" (loops));
+ /* 2 cycles per loop. */
+ __asm__ __volatile__ ("1: addi %0, %0, -2; bgeui %0, 2, 1b"
+ : "=r" (loops) : "0" (loops));
}
static __inline__ u32 xtensa_get_ccount(void)
@@ -46,4 +46,3 @@ static __inline__ void udelay (unsigned long usecs)
}
#endif
-
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
index 492c95790ad..4acb5feba1f 100644
--- a/arch/xtensa/include/asm/dma-mapping.h
+++ b/arch/xtensa/include/asm/dma-mapping.h
@@ -16,6 +16,8 @@
#include <linux/mm.h>
#include <linux/scatterlist.h>
+#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
+
/*
* DMA-consistent mapping functions.
*/
@@ -98,8 +100,8 @@ dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
}
static inline void
-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
+dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction direction)
{
consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
}
diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h
index 5293312bc6a..264d5fa450d 100644
--- a/arch/xtensa/include/asm/elf.h
+++ b/arch/xtensa/include/asm/elf.h
@@ -168,11 +168,11 @@ extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *);
*/
#define ELF_PLAT_INIT(_r, load_addr) \
- do { _r->areg[0]=0; /*_r->areg[1]=0;*/ _r->areg[2]=0; _r->areg[3]=0; \
- _r->areg[4]=0; _r->areg[5]=0; _r->areg[6]=0; _r->areg[7]=0; \
- _r->areg[8]=0; _r->areg[9]=0; _r->areg[10]=0; _r->areg[11]=0; \
- _r->areg[12]=0; _r->areg[13]=0; _r->areg[14]=0; _r->areg[15]=0; \
- } while (0)
+ do { _r->areg[0]=0; /*_r->areg[1]=0;*/ _r->areg[2]=0; _r->areg[3]=0; \
+ _r->areg[4]=0; _r->areg[5]=0; _r->areg[6]=0; _r->areg[7]=0; \
+ _r->areg[8]=0; _r->areg[9]=0; _r->areg[10]=0; _r->areg[11]=0; \
+ _r->areg[12]=0; _r->areg[13]=0; _r->areg[14]=0; _r->areg[15]=0; \
+ } while (0)
typedef struct {
xtregs_opt_t opt;
diff --git a/arch/xtensa/include/asm/highmem.h b/arch/xtensa/include/asm/highmem.h
index 0a046ca5a68..80be1512469 100644
--- a/arch/xtensa/include/asm/highmem.h
+++ b/arch/xtensa/include/asm/highmem.h
@@ -14,4 +14,3 @@
extern void flush_cache_kmaps(void);
#endif
-
diff --git a/arch/xtensa/include/asm/initialize_mmu.h b/arch/xtensa/include/asm/initialize_mmu.h
new file mode 100644
index 00000000000..e1f8ba4061e
--- /dev/null
+++ b/arch/xtensa/include/asm/initialize_mmu.h
@@ -0,0 +1,55 @@
+/*
+ * arch/xtensa/include/asm/initialize_mmu.h
+ *
+ * Initializes MMU:
+ *
+ * For the new V3 MMU we remap the TLB from virtual == physical
+ * to the standard Linux mapping used in earlier MMU's.
+ *
+ * The the MMU we also support a new configuration register that
+ * specifies how the S32C1I instruction operates with the cache
+ * controller.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2008 - 2012 Tensilica, Inc.
+ *
+ * Marc Gauthier <marc@tensilica.com>
+ * Pete Delaney <piet@tensilica.com>
+ */
+
+#ifndef _XTENSA_INITIALIZE_MMU_H
+#define _XTENSA_INITIALIZE_MMU_H
+
+#ifdef __ASSEMBLY__
+
+#define XTENSA_HWVERSION_RC_2009_0 230000
+
+ .macro initialize_mmu
+
+#if XCHAL_HAVE_S32C1I && (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RC_2009_0)
+/*
+ * We Have Atomic Operation Control (ATOMCTL) Register; Initialize it.
+ * For details see Documentation/xtensa/atomctl.txt
+ */
+#if XCHAL_DCACHE_IS_COHERENT
+ movi a3, 0x25 /* For SMP/MX -- internal for writeback,
+ * RCW otherwise
+ */
+#else
+ movi a3, 0x29 /* non-MX -- Most cores use Std Memory
+ * Controlers which usually can't use RCW
+ */
+#endif
+ wsr a3, atomctl
+#endif /* XCHAL_HAVE_S32C1I &&
+ * (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RC_2009_0)
+ */
+
+ .endm
+
+#endif /*__ASSEMBLY__*/
+
+#endif /* _XTENSA_INITIALIZE_MMU_H */
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index e6be5b9091c..700c2e6f2d2 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -62,6 +62,10 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
static inline void iounmap(volatile void __iomem *addr)
{
}
+
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+
#endif /* CONFIG_MMU */
/*
diff --git a/arch/xtensa/include/asm/mmu.h b/arch/xtensa/include/asm/mmu.h
index 04890d6e233..8554b2c8b17 100644
--- a/arch/xtensa/include/asm/mmu.h
+++ b/arch/xtensa/include/asm/mmu.h
@@ -12,7 +12,7 @@
#define _XTENSA_MMU_H
#ifndef CONFIG_MMU
-#include <asm/nommu.h>
+#include <asm-generic/mmu.h>
#else
/* Default "unsigned long" context */
diff --git a/arch/xtensa/include/asm/mmu_context.h b/arch/xtensa/include/asm/mmu_context.h
index feb10af9651..d43525a286b 100644
--- a/arch/xtensa/include/asm/mmu_context.h
+++ b/arch/xtensa/include/asm/mmu_context.h
@@ -107,7 +107,7 @@ activate_mm(struct mm_struct *prev, struct mm_struct *next)
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
- struct task_struct *tsk)
+ struct task_struct *tsk)
{
unsigned long asid = asid_cache;
diff --git a/arch/xtensa/include/asm/nommu.h b/arch/xtensa/include/asm/nommu.h
deleted file mode 100644
index dce2c438c5b..00000000000
--- a/arch/xtensa/include/asm/nommu.h
+++ /dev/null
@@ -1,3 +0,0 @@
-typedef struct {
- unsigned long end_brk;
-} mm_context_t;
diff --git a/arch/xtensa/include/asm/nommu_context.h b/arch/xtensa/include/asm/nommu_context.h
index 599e7a2e729..3407cf7989b 100644
--- a/arch/xtensa/include/asm/nommu_context.h
+++ b/arch/xtensa/include/asm/nommu_context.h
@@ -2,7 +2,7 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}
-static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+static inline int init_new_context(struct task_struct *tsk,struct mm_struct *mm)
{
return 0;
}
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
index 7a5591a71f8..47f582333f6 100644
--- a/arch/xtensa/include/asm/page.h
+++ b/arch/xtensa/include/asm/page.h
@@ -29,19 +29,19 @@
* PAGE_SHIFT determines the page size
*/
-#define PAGE_SHIFT 12
-#define PAGE_SIZE (__XTENSA_UL_CONST(1) << PAGE_SHIFT)
-#define PAGE_MASK (~(PAGE_SIZE-1))
+#define PAGE_SHIFT 12
+#define PAGE_SIZE (__XTENSA_UL_CONST(1) << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef CONFIG_MMU
-#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
-#define MAX_MEM_PFN XCHAL_KSEG_SIZE
+#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
+#define MAX_MEM_PFN XCHAL_KSEG_SIZE
#else
-#define PAGE_OFFSET 0
-#define MAX_MEM_PFN (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE)
+#define PAGE_OFFSET 0
+#define MAX_MEM_PFN (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE)
#endif
-#define PGTABLE_START 0x80000000
+#define PGTABLE_START 0x80000000
/*
* Cache aliasing:
@@ -161,7 +161,9 @@ extern void copy_user_page(void*, void*, unsigned long, struct page*);
#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
-#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
+#define pfn_valid(pfn) \
+ ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
+
#ifdef CONFIG_DISCONTIGMEM
# error CONFIG_DISCONTIGMEM not supported
#endif
diff --git a/arch/xtensa/include/asm/pci-bridge.h b/arch/xtensa/include/asm/pci-bridge.h
index 00fcbd7c534..0b68c76ec1e 100644
--- a/arch/xtensa/include/asm/pci-bridge.h
+++ b/arch/xtensa/include/asm/pci-bridge.h
@@ -35,7 +35,7 @@ struct pci_space {
struct pci_controller {
int index; /* used for pci_controller_num */
struct pci_controller *next;
- struct pci_bus *bus;
+ struct pci_bus *bus;
void *arch_data;
int first_busno;
diff --git a/arch/xtensa/include/asm/pci.h b/arch/xtensa/include/asm/pci.h
index 05244f07dd3..614be031a79 100644
--- a/arch/xtensa/include/asm/pci.h
+++ b/arch/xtensa/include/asm/pci.h
@@ -53,7 +53,7 @@ struct pci_dev;
/* Map a range of PCI memory or I/O space for a device into user space */
int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state, int write_combine);
+ enum pci_mmap_state mmap_state, int write_combine);
/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
#define HAVE_PCI_MMAP 1
diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h
index 40cf9bceda2..cf914c8c249 100644
--- a/arch/xtensa/include/asm/pgalloc.h
+++ b/arch/xtensa/include/asm/pgalloc.h
@@ -42,7 +42,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
extern struct kmem_cache *pgtable_cache;
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index b03c043ce75..c90ea5bfa1b 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -284,7 +284,7 @@ struct vm_area_struct;
static inline int
ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr,
- pte_t *ptep)
+ pte_t *ptep)
{
pte_t pte = *ptep;
if (!pte_young(pte))
@@ -304,8 +304,8 @@ ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
static inline void
ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- pte_t pte = *ptep;
- update_pte(ptep, pte_wrprotect(pte));
+ pte_t pte = *ptep;
+ update_pte(ptep, pte_wrprotect(pte));
}
/* to find an entry in a kernel page-table-directory */
@@ -399,7 +399,7 @@ extern void update_mmu_cache(struct vm_area_struct * vma,
*/
#define io_remap_pfn_range(vma,from,pfn,size,prot) \
- remap_pfn_range(vma, from, pfn, size, prot)
+ remap_pfn_range(vma, from, pfn, size, prot)
typedef pte_t *pte_addr_t;
diff --git a/arch/xtensa/include/asm/platform.h b/arch/xtensa/include/asm/platform.h
index 7d936e58e9b..ec098b68fb9 100644
--- a/arch/xtensa/include/asm/platform.h
+++ b/arch/xtensa/include/asm/platform.h
@@ -75,4 +75,3 @@ extern int platform_pcibios_fixup (void);
extern void platform_calibrate_ccount (void);
#endif /* _XTENSA_PLATFORM_H */
-
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 5c371d8d452..e5fb6b0abdf 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -89,7 +89,7 @@
#define MAKE_PC_FROM_RA(ra,sp) (((ra) & 0x3fffffff) | ((sp) & 0xc0000000))
typedef struct {
- unsigned long seg;
+ unsigned long seg;
} mm_segment_t;
struct thread_struct {
@@ -145,13 +145,14 @@ struct thread_struct {
* set_thread_state in signal.c depends on it.
*/
#define USER_PS_VALUE ((1 << PS_WOE_BIT) | \
- (1 << PS_CALLINC_SHIFT) | \
- (USER_RING << PS_RING_SHIFT) | \
- (1 << PS_UM_BIT) | \
- (1 << PS_EXCM_BIT))
+ (1 << PS_CALLINC_SHIFT) | \
+ (USER_RING << PS_RING_SHIFT) | \
+ (1 << PS_UM_BIT) | \
+ (1 << PS_EXCM_BIT))
/* Clearing a0 terminates the backtrace. */
#define start_thread(regs, new_pc, new_sp) \
+ memset(regs, 0, sizeof(*regs)); \
regs->pc = new_pc; \
regs->ps = USER_PS_VALUE; \
regs->areg[1] = new_sp; \
@@ -168,9 +169,6 @@ struct mm_struct;
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)
-/* Create a kernel thread without removing it from tasklists */
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
/* Copy and release all segment info associated with a VM */
#define copy_segments(p, mm) do { } while(0)
#define release_segments(mm) do { } while(0)
diff --git a/arch/xtensa/include/asm/prom.h b/arch/xtensa/include/asm/prom.h
new file mode 100644
index 00000000000..f3d7cd2c0de
--- /dev/null
+++ b/arch/xtensa/include/asm/prom.h
@@ -0,0 +1,6 @@
+#ifndef _XTENSA_ASM_PROM_H
+#define _XTENSA_ASM_PROM_H
+
+#define HAVE_ARCH_DEVTREE_FIXUPS
+
+#endif /* _XTENSA_ASM_PROM_H */
diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h
index da21c17f23a..682b1deac1f 100644
--- a/arch/xtensa/include/asm/ptrace.h
+++ b/arch/xtensa/include/asm/ptrace.h
@@ -37,7 +37,7 @@ struct pt_regs {
unsigned long windowstart; /* 52 */
unsigned long syscall; /* 56 */
unsigned long icountlevel; /* 60 */
- int reserved[1]; /* 64 */
+ unsigned long scompare1; /* 64 */
/* Additional configurable registers that are used by the compiler. */
xtregs_opt_t xtregs_opt;
@@ -55,7 +55,7 @@ struct pt_regs {
# define arch_has_single_step() (1)
# define task_pt_regs(tsk) ((struct pt_regs*) \
- (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
+ (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
# define instruction_pointer(regs) ((regs)->pc)
@@ -63,6 +63,8 @@ struct pt_regs {
# define profile_pc(regs) instruction_pointer(regs)
# endif
+#define user_stack_pointer(regs) ((regs)->areg[1])
+
#else /* __ASSEMBLY__ */
# include <asm/asm-offsets.h>
diff --git a/arch/xtensa/include/asm/regs.h b/arch/xtensa/include/asm/regs.h
index 8a8aa61ccc8..76096a4e5b8 100644
--- a/arch/xtensa/include/asm/regs.h
+++ b/arch/xtensa/include/asm/regs.h
@@ -52,6 +52,10 @@
#define EXCCAUSE_SPECULATION 7
#define EXCCAUSE_PRIVILEGED 8
#define EXCCAUSE_UNALIGNED 9
+#define EXCCAUSE_INSTR_DATA_ERROR 12
+#define EXCCAUSE_LOAD_STORE_DATA_ERROR 13
+#define EXCCAUSE_INSTR_ADDR_ERROR 14
+#define EXCCAUSE_LOAD_STORE_ADDR_ERROR 15
#define EXCCAUSE_ITLB_MISS 16
#define EXCCAUSE_ITLB_MULTIHIT 17
#define EXCCAUSE_ITLB_PRIVILEGE 18
@@ -105,4 +109,3 @@
#define DEBUGCAUSE_ICOUNT_BIT 0 /* ICOUNT would incr. to zero */
#endif /* _XTENSA_SPECREG_H */
-
diff --git a/arch/xtensa/include/asm/signal.h b/arch/xtensa/include/asm/signal.h
index 72fd44c85b7..6f586bd90e1 100644
--- a/arch/xtensa/include/asm/signal.h
+++ b/arch/xtensa/include/asm/signal.h
@@ -27,7 +27,6 @@ struct k_sigaction {
};
#include <asm/sigcontext.h>
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
#endif /* __ASSEMBLY__ */
#endif /* _XTENSA_SIGNAL_H */
diff --git a/arch/xtensa/include/asm/spinlock.h b/arch/xtensa/include/asm/spinlock.h
index 8ff23649581..03975906b36 100644
--- a/arch/xtensa/include/asm/spinlock.h
+++ b/arch/xtensa/include/asm/spinlock.h
@@ -11,6 +11,192 @@
#ifndef _XTENSA_SPINLOCK_H
#define _XTENSA_SPINLOCK_H
-#include <linux/spinlock.h>
+/*
+ * spinlock
+ *
+ * There is at most one owner of a spinlock. There are not different
+ * types of spinlock owners like there are for rwlocks (see below).
+ *
+ * When trying to obtain a spinlock, the function "spins" forever, or busy-
+ * waits, until the lock is obtained. When spinning, presumably some other
+ * owner will soon give up the spinlock making it available to others. Use
+ * the trylock functions to avoid spinning forever.
+ *
+ * possible values:
+ *
+ * 0 nobody owns the spinlock
+ * 1 somebody owns the spinlock
+ */
+
+#define __raw_spin_is_locked(x) ((x)->slock != 0)
+#define __raw_spin_unlock_wait(lock) \
+ do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
+
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
+
+static inline void __raw_spin_lock(raw_spinlock_t *lock)
+{
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " movi %0, 0\n"
+ " wsr %0, scompare1\n"
+ "1: movi %0, 1\n"
+ " s32c1i %0, %1, 0\n"
+ " bnez %0, 1b\n"
+ : "=&a" (tmp)
+ : "a" (&lock->slock)
+ : "memory");
+}
+
+/* Returns 1 if the lock is obtained, 0 otherwise. */
+
+static inline int __raw_spin_trylock(raw_spinlock_t *lock)
+{
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " movi %0, 0\n"
+ " wsr %0, scompare1\n"
+ " movi %0, 1\n"
+ " s32c1i %0, %1, 0\n"
+ : "=&a" (tmp)
+ : "a" (&lock->slock)
+ : "memory");
+
+ return tmp == 0 ? 1 : 0;
+}
+
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
+{
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " movi %0, 0\n"
+ " s32ri %0, %1, 0\n"
+ : "=&a" (tmp)
+ : "a" (&lock->slock)
+ : "memory");
+}
+
+/*
+ * rwlock
+ *
+ * Read-write locks are really a more flexible spinlock. They allow
+ * multiple readers but only one writer. Write ownership is exclusive
+ * (i.e., all other readers and writers are blocked from ownership while
+ * there is a write owner). These rwlocks are unfair to writers. Writers
+ * can be starved for an indefinite time by readers.
+ *
+ * possible values:
+ *
+ * 0 nobody owns the rwlock
+ * >0 one or more readers own the rwlock
+ * (the positive value is the actual number of readers)
+ * 0x80000000 one writer owns the rwlock, no other writers, no readers
+ */
+
+#define __raw_write_can_lock(x) ((x)->lock == 0)
+
+static inline void __raw_write_lock(raw_rwlock_t *rw)
+{
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " movi %0, 0\n"
+ " wsr %0, scompare1\n"
+ "1: movi %0, 1\n"
+ " slli %0, %0, 31\n"
+ " s32c1i %0, %1, 0\n"
+ " bnez %0, 1b\n"
+ : "=&a" (tmp)
+ : "a" (&rw->lock)
+ : "memory");
+}
+
+/* Returns 1 if the lock is obtained, 0 otherwise. */
+
+static inline int __raw_write_trylock(raw_rwlock_t *rw)
+{
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " movi %0, 0\n"
+ " wsr %0, scompare1\n"
+ " movi %0, 1\n"
+ " slli %0, %0, 31\n"
+ " s32c1i %0, %1, 0\n"
+ : "=&a" (tmp)
+ : "a" (&rw->lock)
+ : "memory");
+
+ return tmp == 0 ? 1 : 0;
+}
+
+static inline void __raw_write_unlock(raw_rwlock_t *rw)
+{
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " movi %0, 0\n"
+ " s32ri %0, %1, 0\n"
+ : "=&a" (tmp)
+ : "a" (&rw->lock)
+ : "memory");
+}
+
+static inline void __raw_read_lock(raw_rwlock_t *rw)
+{
+ unsigned long tmp;
+ unsigned long result;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %2, 0\n"
+ " bltz %1, 1b\n"
+ " wsr %1, scompare1\n"
+ " addi %0, %1, 1\n"
+ " s32c1i %0, %2, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (&rw->lock)
+ : "memory");
+}
+
+/* Returns 1 if the lock is obtained, 0 otherwise. */
+
+static inline int __raw_read_trylock(raw_rwlock_t *rw)
+{
+ unsigned long result;
+ unsigned long tmp;
+
+ __asm__ __volatile__(
+ " l32i %1, %2, 0\n"
+ " addi %0, %1, 1\n"
+ " bltz %0, 1f\n"
+ " wsr %1, scompare1\n"
+ " s32c1i %0, %2, 0\n"
+ " sub %0, %0, %1\n"
+ "1:\n"
+ : "=&a" (result), "=&a" (tmp)
+ : "a" (&rw->lock)
+ : "memory");
+
+ return result == 0;
+}
+
+static inline void __raw_read_unlock(raw_rwlock_t *rw)
+{
+ unsigned long tmp1, tmp2;
+
+ __asm__ __volatile__(
+ "1: l32i %1, %2, 0\n"
+ " addi %0, %1, -1\n"
+ " wsr %1, scompare1\n"
+ " s32c1i %0, %2, 0\n"
+ " bne %0, %1, 1b\n"
+ : "=&a" (tmp1), "=&a" (tmp2)
+ : "a" (&rw->lock)
+ : "memory");
+}
#endif /* _XTENSA_SPINLOCK_H */
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index c1dacca312f..8d5e47fad09 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -10,8 +10,6 @@
struct pt_regs;
struct sigaction;
-asmlinkage long xtensa_execve(char*, char**, char**, struct pt_regs*);
-asmlinkage long xtensa_clone(unsigned long, unsigned long, struct pt_regs*);
asmlinkage long xtensa_ptrace(long, long, long, long);
asmlinkage long xtensa_sigreturn(struct pt_regs*);
asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
@@ -27,9 +25,10 @@ asmlinkage long xtensa_fadvise64_64(int, int,
/* Should probably move to linux/syscalls.h */
struct pollfd;
asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp,
- fd_set __user *exp, struct timespec __user *tsp, void __user *sig);
+ fd_set __user *exp, struct timespec __user *tsp,
+ void __user *sig);
asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
- struct timespec __user *tsp, const sigset_t __user *sigmask,
- size_t sigsetsize);
-asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset,
- size_t sigsetsize);
+ struct timespec __user *tsp,
+ const sigset_t __user *sigmask,
+ size_t sigsetsize);
+asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize);
diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h
new file mode 100644
index 00000000000..54f70440185
--- /dev/null
+++ b/arch/xtensa/include/asm/traps.h
@@ -0,0 +1,23 @@
+/*
+ * arch/xtensa/include/asm/traps.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 Tensilica Inc.
+ */
+#ifndef _XTENSA_TRAPS_H
+#define _XTENSA_TRAPS_H
+
+#include <asm/ptrace.h>
+
+/*
+ * handler must be either of the following:
+ * void (*)(struct pt_regs *regs);
+ * void (*)(struct pt_regs *regs, unsigned long exccause);
+ */
+extern void * __init trap_set_handler(int cause, void *handler);
+extern void do_unhandled(struct pt_regs *regs, unsigned long exccause);
+
+#endif /* _XTENSA_TRAPS_H */
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index 6e4bb3b791a..fd686dc45d1 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -180,7 +180,8 @@
#define segment_eq(a,b) ((a).seg == (b).seg)
#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
-#define __user_ok(addr,size) (((size) <= TASK_SIZE)&&((addr) <= TASK_SIZE-(size)))
+#define __user_ok(addr,size) \
+ (((size) <= TASK_SIZE)&&((addr) <= TASK_SIZE-(size)))
#define __access_ok(addr,size) (__kernel_ok || __user_ok((addr),(size)))
#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
@@ -234,10 +235,10 @@ do { \
int __cb; \
retval = 0; \
switch (size) { \
- case 1: __put_user_asm(x,ptr,retval,1,"s8i",__cb); break; \
- case 2: __put_user_asm(x,ptr,retval,2,"s16i",__cb); break; \
- case 4: __put_user_asm(x,ptr,retval,4,"s32i",__cb); break; \
- case 8: { \
+ case 1: __put_user_asm(x,ptr,retval,1,"s8i",__cb); break; \
+ case 2: __put_user_asm(x,ptr,retval,2,"s16i",__cb); break; \
+ case 4: __put_user_asm(x,ptr,retval,4,"s32i",__cb); break; \
+ case 8: { \
__typeof__(*ptr) __v64 = x; \
retval = __copy_to_user(ptr,&__v64,8); \
break; \
@@ -291,7 +292,7 @@ do { \
* __check_align_* macros still work.
*/
#define __put_user_asm(x, addr, err, align, insn, cb) \
- __asm__ __volatile__( \
+__asm__ __volatile__( \
__check_align_##align \
"1: "insn" %2, %3, 0 \n" \
"2: \n" \
@@ -301,8 +302,8 @@ do { \
" .long 2b \n" \
"5: \n" \
" l32r %1, 4b \n" \
- " movi %0, %4 \n" \
- " jx %1 \n" \
+ " movi %0, %4 \n" \
+ " jx %1 \n" \
" .previous \n" \
" .section __ex_table,\"a\" \n" \
" .long 1b, 5b \n" \
@@ -334,13 +335,13 @@ extern long __get_user_bad(void);
do { \
int __cb; \
retval = 0; \
- switch (size) { \
- case 1: __get_user_asm(x,ptr,retval,1,"l8ui",__cb); break; \
- case 2: __get_user_asm(x,ptr,retval,2,"l16ui",__cb); break; \
- case 4: __get_user_asm(x,ptr,retval,4,"l32i",__cb); break; \
- case 8: retval = __copy_from_user(&x,ptr,8); break; \
- default: (x) = __get_user_bad(); \
- } \
+ switch (size) { \
+ case 1: __get_user_asm(x,ptr,retval,1,"l8ui",__cb); break; \
+ case 2: __get_user_asm(x,ptr,retval,2,"l16ui",__cb); break; \
+ case 4: __get_user_asm(x,ptr,retval,4,"l32i",__cb); break; \
+ case 8: retval = __copy_from_user(&x,ptr,8); break; \
+ default: (x) = __get_user_bad(); \
+ } \
} while (0)
@@ -349,7 +350,7 @@ do { \
* __check_align_* macros still work.
*/
#define __get_user_asm(x, addr, err, align, insn, cb) \
- __asm__ __volatile__( \
+__asm__ __volatile__( \
__check_align_##align \
"1: "insn" %2, %3, 0 \n" \
"2: \n" \
@@ -360,8 +361,8 @@ do { \
"5: \n" \
" l32r %1, 4b \n" \
" movi %2, 0 \n" \
- " movi %0, %4 \n" \
- " jx %1 \n" \
+ " movi %0, %4 \n" \
+ " jx %1 \n" \
" .previous \n" \
" .section __ex_table,\"a\" \n" \
" .long 1b, 5b \n" \
@@ -421,8 +422,10 @@ __generic_copy_from_user(void *to, const void *from, unsigned long n)
#define copy_to_user(to,from,n) __generic_copy_to_user((to),(from),(n))
#define copy_from_user(to,from,n) __generic_copy_from_user((to),(from),(n))
-#define __copy_to_user(to,from,n) __generic_copy_to_user_nocheck((to),(from),(n))
-#define __copy_from_user(to,from,n) __generic_copy_from_user_nocheck((to),(from),(n))
+#define __copy_to_user(to,from,n) \
+ __generic_copy_to_user_nocheck((to),(from),(n))
+#define __copy_from_user(to,from,n) \
+ __generic_copy_from_user_nocheck((to),(from),(n))
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index 9ef1c31d2c8..eb63ea87815 100644
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -1,16 +1,9 @@
-/*
- * include/asm-xtensa/unistd.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
+#ifndef _XTENSA_UNISTD_H
+#define _XTENSA_UNISTD_H
+#define __ARCH_WANT_SYS_CLONE
#include <uapi/asm/unistd.h>
-
/*
* "Conditional" syscalls
*
@@ -37,3 +30,5 @@
#define __IGNORE_mmap /* use mmap2 */
#define __IGNORE_vfork /* use clone */
#define __IGNORE_fadvise64 /* use fadvise64_64 */
+
+#endif /* _XTENSA_UNISTD_H */
diff --git a/arch/xtensa/include/uapi/asm/ioctls.h b/arch/xtensa/include/uapi/asm/ioctls.h
index 2aa4cd9f0ce..b4cb1100c0f 100644
--- a/arch/xtensa/include/uapi/asm/ioctls.h
+++ b/arch/xtensa/include/uapi/asm/ioctls.h
@@ -101,6 +101,9 @@
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP _IO('T', 0x37)
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCSERCONFIG _IO('T', 83)
#define TIOCSERGWILD _IOR('T', 84, int)
diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h
index 25bc6c1309c..00eed6786d7 100644
--- a/arch/xtensa/include/uapi/asm/mman.h
+++ b/arch/xtensa/include/uapi/asm/mman.h
@@ -93,4 +93,15 @@
/* compatibility flags */
#define MAP_FILE 0
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+
#endif /* _XTENSA_MMAN_H */
diff --git a/arch/xtensa/include/uapi/asm/signal.h b/arch/xtensa/include/uapi/asm/signal.h
index b88ce96f2af..dacf716dd3e 100644
--- a/arch/xtensa/include/uapi/asm/signal.h
+++ b/arch/xtensa/include/uapi/asm/signal.h
@@ -97,12 +97,6 @@ typedef struct {
#define SA_RESTORER 0x04000000
-/*
- * sigaltstack controls
- */
-#define SS_ONSTACK 1
-#define SS_DISABLE 2
-
#define MINSIGSTKSZ 2048
#define SIGSTKSZ 8192
diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h
index e36c6818492..38079be1cf1 100644
--- a/arch/xtensa/include/uapi/asm/socket.h
+++ b/arch/xtensa/include/uapi/asm/socket.h
@@ -52,6 +52,7 @@
#define SO_ATTACH_FILTER 26
#define SO_DETACH_FILTER 27
+#define SO_GET_FILTER SO_ATTACH_FILTER
#define SO_PEERNAME 28
#define SO_TIMESTAMP 29
diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h
index 479abaea5aa..5162418c5d9 100644
--- a/arch/xtensa/include/uapi/asm/unistd.h
+++ b/arch/xtensa/include/uapi/asm/unistd.h
@@ -1,14 +1,4 @@
-/*
- * include/asm-xtensa/unistd.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2012 Tensilica Inc.
- */
-
-#ifndef _UAPI_XTENSA_UNISTD_H
+#if !defined(_UAPI_XTENSA_UNISTD_H) || defined(__SYSCALL)
#define _UAPI_XTENSA_UNISTD_H
#ifndef __SYSCALL
@@ -270,9 +260,9 @@ __SYSCALL(115, sys_sendmmsg, 4)
/* Process Operations */
#define __NR_clone 116
-__SYSCALL(116, xtensa_clone, 5)
+__SYSCALL(116, sys_clone, 5)
#define __NR_execve 117
-__SYSCALL(117, xtensa_execve, 3)
+__SYSCALL(117, sys_execve, 3)
#define __NR_exit 118
__SYSCALL(118, sys_exit, 1)
#define __NR_exit_group 119
@@ -759,4 +749,6 @@ __SYSCALL(331, sys_kcmp, 5)
#define SYS_XTENSA_COUNT 5 /* count */
+#undef __SYSCALL
+
#endif /* _UAPI_XTENSA_UNISTD_H */
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index f36cef5a62f..c3a59d992ac 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -23,13 +23,13 @@ obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
#
# Replicate rules in scripts/Makefile.build
-sed-y = -e 's/\*(\(\.[a-z]*it\|\.ref\|\)\.text)/*(\1.literal \1.text)/g' \
- -e 's/\.text\.unlikely/.literal.unlikely .text.unlikely/g' \
+sed-y = -e 's/\*(\(\.[a-z]*it\|\.ref\|\)\.text)/*(\1.literal \1.text)/g' \
+ -e 's/\.text\.unlikely/.literal.unlikely .text.unlikely/g' \
-e 's/\*(\(\.text\.[a-z]*\))/*(\1.literal \1)/g'
quiet_cmd__cpp_lds_S = LDS $@
- cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
- | sed $(sed-y) >$@
+cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
+ | sed $(sed-y) >$@
$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
$(call if_changed_dep,_cpp_lds_S)
diff --git a/arch/xtensa/kernel/align.S b/arch/xtensa/kernel/align.S
index 934ae58e2c7..aa2e87b8566 100644
--- a/arch/xtensa/kernel/align.S
+++ b/arch/xtensa/kernel/align.S
@@ -442,7 +442,7 @@ ENTRY(fast_unaligned)
mov a1, a2
rsr a0, ps
- bbsi.l a2, PS_UM_BIT, 1f # jump if user mode
+ bbsi.l a2, PS_UM_BIT, 1f # jump if user mode
movi a0, _kernel_exception
jx a0
@@ -450,6 +450,6 @@ ENTRY(fast_unaligned)
1: movi a0, _user_exception
jx a0
+ENDPROC(fast_unaligned)
#endif /* XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION */
-
diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index 7dc3f915718..0701fad170d 100644
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -41,6 +41,7 @@ int main(void)
DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
DEFINE(PT_ICOUNTLEVEL, offsetof (struct pt_regs, icountlevel));
DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
+ DEFINE(PT_SCOMPARE1, offsetof(struct pt_regs, scompare1));
DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));
DEFINE(PT_AREG1, offsetof (struct pt_regs, areg[1]));
@@ -91,7 +92,8 @@ int main(void)
#endif
DEFINE(THREAD_XTREGS_USER, offsetof (struct thread_info, xtregs_user));
DEFINE(XTREGS_USER_SIZE, sizeof(xtregs_user_t));
- DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, thread.current_ds));
+ DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, \
+ thread.current_ds));
/* struct mm_struct */
DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users));
@@ -108,4 +110,3 @@ int main(void)
return 0;
}
-
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
index 54c3be313bf..64765748486 100644
--- a/arch/xtensa/kernel/coprocessor.S
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -43,10 +43,13 @@
/* IO protection is currently unsupported. */
ENTRY(fast_io_protect)
+
wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
+ENDPROC(fast_io_protect)
+
#if XTENSA_HAVE_COPROCESSORS
/*
@@ -139,6 +142,7 @@ ENTRY(fast_io_protect)
*/
ENTRY(coprocessor_save)
+
entry a1, 32
s32i a0, a1, 0
movi a0, .Lsave_cp_regs_jump_table
@@ -150,7 +154,10 @@ ENTRY(coprocessor_save)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_save)
+
ENTRY(coprocessor_load)
+
entry a1, 32
s32i a0, a1, 0
movi a0, .Lload_cp_regs_jump_table
@@ -162,8 +169,10 @@ ENTRY(coprocessor_load)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_load)
+
/*
- * coprocessor_flush(struct task_info*, index)
+ * coprocessor_flush(struct task_info*, index)
* a2 a3
* coprocessor_restore(struct task_info*, index)
* a2 a3
@@ -178,6 +187,7 @@ ENTRY(coprocessor_load)
ENTRY(coprocessor_flush)
+
entry a1, 32
s32i a0, a1, 0
movi a0, .Lsave_cp_regs_jump_table
@@ -191,6 +201,8 @@ ENTRY(coprocessor_flush)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_flush)
+
ENTRY(coprocessor_restore)
entry a1, 32
s32i a0, a1, 0
@@ -205,6 +217,8 @@ ENTRY(coprocessor_restore)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_restore)
+
/*
* Entry condition:
*
@@ -220,10 +234,12 @@ ENTRY(coprocessor_restore)
*/
ENTRY(fast_coprocessor_double)
+
wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
+ENDPROC(fast_coprocessor_double)
ENTRY(fast_coprocessor)
@@ -327,9 +343,14 @@ ENTRY(fast_coprocessor)
rfe
+ENDPROC(fast_coprocessor)
+
.data
+
ENTRY(coprocessor_owner)
+
.fill XCHAL_CP_MAX, 4, 0
-#endif /* XTENSA_HAVE_COPROCESSORS */
+END(coprocessor_owner)
+#endif /* XTENSA_HAVE_COPROCESSORS */
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 18453067c25..3777fec85e7 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -219,6 +219,7 @@ _user_exception:
j common_exception
+ENDPROC(user_exception)
/*
* First-level exit handler for kernel exceptions
@@ -371,6 +372,13 @@ common_exception:
s32i a2, a1, PT_LBEG
s32i a3, a1, PT_LEND
+ /* Save SCOMPARE1 */
+
+#if XCHAL_HAVE_S32C1I
+ rsr a2, scompare1
+ s32i a2, a1, PT_SCOMPARE1
+#endif
+
/* Save optional registers. */
save_xtregs_opt a1 a2 a4 a5 a6 a7 PT_XTREGS_OPT
@@ -432,6 +440,12 @@ common_exception_return:
load_xtregs_opt a1 a2 a4 a5 a6 a7 PT_XTREGS_OPT
+ /* Restore SCOMPARE1 */
+
+#if XCHAL_HAVE_S32C1I
+ l32i a2, a1, PT_SCOMPARE1
+ wsr a2, scompare1
+#endif
wsr a3, ps /* disable interrupts */
_bbci.l a3, PS_UM_BIT, kernel_exception_exit
@@ -641,6 +655,8 @@ common_exception_exit:
l32i a1, a1, PT_AREG1
rfde
+ENDPROC(kernel_exception)
+
/*
* Debug exception handler.
*
@@ -701,6 +717,7 @@ ENTRY(debug_exception)
/* Debug exception while in exception mode. */
1: j 1b // FIXME!!
+ENDPROC(debug_exception)
/*
* We get here in case of an unrecoverable exception.
@@ -751,6 +768,7 @@ ENTRY(unrecoverable_exception)
1: j 1b
+ENDPROC(unrecoverable_exception)
/* -------------------------- FAST EXCEPTION HANDLERS ----------------------- */
@@ -856,7 +874,7 @@ ENTRY(fast_alloca)
_bnei a0, 1, 1f # no 'movsp a1, ax': jump
- /* Move the save area. This implies the use of the L32E
+ /* Move the save area. This implies the use of the L32E
* and S32E instructions, because this move must be done with
* the user's PS.RING privilege levels, not with ring 0
* (kernel's) privileges currently active with PS.EXCM
@@ -929,6 +947,7 @@ ENTRY(fast_alloca)
l32i a2, a2, PT_AREG2
rfe
+ENDPROC(fast_alloca)
/*
* fast system calls.
@@ -966,6 +985,8 @@ ENTRY(fast_syscall_kernel)
j kernel_exception
+ENDPROC(fast_syscall_kernel)
+
ENTRY(fast_syscall_user)
/* Skip syscall. */
@@ -983,19 +1004,21 @@ ENTRY(fast_syscall_user)
j user_exception
-ENTRY(fast_syscall_unrecoverable)
+ENDPROC(fast_syscall_user)
- /* Restore all states. */
+ENTRY(fast_syscall_unrecoverable)
- l32i a0, a2, PT_AREG0 # restore a0
- xsr a2, depc # restore a2, depc
- rsr a3, excsave1
+ /* Restore all states. */
- wsr a0, excsave1
- movi a0, unrecoverable_exception
- callx0 a0
+ l32i a0, a2, PT_AREG0 # restore a0
+ xsr a2, depc # restore a2, depc
+ rsr a3, excsave1
+ wsr a0, excsave1
+ movi a0, unrecoverable_exception
+ callx0 a0
+ENDPROC(fast_syscall_unrecoverable)
/*
* sysxtensa syscall handler
@@ -1101,7 +1124,7 @@ CATCH
movi a2, -EINVAL
rfe
-
+ENDPROC(fast_syscall_xtensa)
/* fast_syscall_spill_registers.
@@ -1160,6 +1183,8 @@ ENTRY(fast_syscall_spill_registers)
movi a2, 0
rfe
+ENDPROC(fast_syscall_spill_registers)
+
/* Fixup handler.
*
* We get here if the spill routine causes an exception, e.g. tlb miss.
@@ -1228,9 +1253,9 @@ fast_syscall_spill_registers_fixup:
movi a3, exc_table
rsr a0, exccause
- addx4 a0, a0, a3 # find entry in table
- l32i a0, a0, EXC_TABLE_FAST_USER # load handler
- jx a0
+ addx4 a0, a0, a3 # find entry in table
+ l32i a0, a0, EXC_TABLE_FAST_USER # load handler
+ jx a0
fast_syscall_spill_registers_fixup_return:
@@ -1432,7 +1457,7 @@ ENTRY(_spill_registers)
rsr a0, ps
_bbci.l a0, PS_UM_BIT, 1f
- /* User space: Setup a dummy frame and kill application.
+ /* User space: Setup a dummy frame and kill application.
* Note: We assume EXC_TABLE_KSTK contains a valid stack pointer.
*/
@@ -1464,6 +1489,8 @@ ENTRY(_spill_registers)
callx0 a0 # should not return
1: j 1b
+ENDPROC(_spill_registers)
+
#ifdef CONFIG_MMU
/*
* We should never get here. Bail out!
@@ -1475,6 +1502,8 @@ ENTRY(fast_second_level_miss_double_kernel)
callx0 a0 # should not return
1: j 1b
+ENDPROC(fast_second_level_miss_double_kernel)
+
/* First-level entry handler for user, kernel, and double 2nd-level
* TLB miss exceptions. Note that for now, user and kernel miss
* exceptions share the same entry point and are handled identically.
@@ -1682,6 +1711,7 @@ ENTRY(fast_second_level_miss)
j _kernel_exception
1: j _user_exception
+ENDPROC(fast_second_level_miss)
/*
* StoreProhibitedException
@@ -1777,6 +1807,9 @@ ENTRY(fast_store_prohibited)
bbsi.l a2, PS_UM_BIT, 1f
j _kernel_exception
1: j _user_exception
+
+ENDPROC(fast_store_prohibited)
+
#endif /* CONFIG_MMU */
/*
@@ -1787,6 +1820,7 @@ ENTRY(fast_store_prohibited)
*/
ENTRY(system_call)
+
entry a1, 32
/* regs->syscall = regs->areg[2] */
@@ -1831,50 +1865,8 @@ ENTRY(system_call)
callx4 a4
retw
+ENDPROC(system_call)
-/*
- * Create a kernel thread
- *
- * int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
- * a2 a2 a3 a4
- */
-
-ENTRY(kernel_thread)
- entry a1, 16
-
- mov a5, a2 # preserve fn over syscall
- mov a7, a3 # preserve args over syscall
-
- movi a3, _CLONE_VM | _CLONE_UNTRACED
- movi a2, __NR_clone
- or a6, a4, a3 # arg0: flags
- mov a3, a1 # arg1: sp
- syscall
-
- beq a3, a1, 1f # branch if parent
- mov a6, a7 # args
- callx4 a5 # fn(args)
-
- movi a2, __NR_exit
- syscall # return value of fn(args) still in a6
-
-1: retw
-
-/*
- * Do a system call from kernel instead of calling sys_execve, so we end up
- * with proper pt_regs.
- *
- * int kernel_execve(const char *fname, char *const argv[], charg *const envp[])
- * a2 a2 a3 a4
- */
-
-ENTRY(kernel_execve)
- entry a1, 16
- mov a6, a2 # arg0 is in a6
- movi a2, __NR_execve
- syscall
-
- retw
/*
* Task switch.
@@ -1943,6 +1935,7 @@ ENTRY(_switch_to)
retw
+ENDPROC(_switch_to)
ENTRY(ret_from_fork)
@@ -1958,3 +1951,18 @@ ENTRY(ret_from_fork)
j common_exception_return
+ENDPROC(ret_from_fork)
+
+/*
+ * Kernel thread creation helper
+ * On entry, set up by copy_thread: a2 = thread_fn, a3 = thread_fn arg
+ * left from _switch_to: a6 = prev
+ */
+ENTRY(ret_from_kernel_thread)
+
+ call4 schedule_tail
+ mov a6, a3
+ callx4 a2
+ j common_exception_return
+
+ENDPROC(ret_from_kernel_thread)
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index bdc50788f35..91d9095284d 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -18,6 +18,7 @@
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/cacheasm.h>
+#include <asm/initialize_mmu.h>
#include <linux/init.h>
#include <linux/linkage.h>
@@ -47,16 +48,19 @@
*/
__HEAD
- .globl _start
-_start: _j 2f
+ENTRY(_start)
+
+ _j 2f
.align 4
1: .word _startup
2: l32r a0, 1b
jx a0
+ENDPROC(_start)
+
.section .init.text, "ax"
- .align 4
-_startup:
+
+ENTRY(_startup)
/* Disable interrupts and exceptions. */
@@ -107,7 +111,7 @@ _startup:
/* Disable all timers. */
.set _index, 0
- .rept XCHAL_NUM_TIMERS - 1
+ .rept XCHAL_NUM_TIMERS
wsr a0, SREG_CCOMPARE + _index
.set _index, _index + 1
.endr
@@ -120,7 +124,7 @@ _startup:
/* Disable coprocessors. */
-#if XCHAL_CP_NUM > 0
+#if XCHAL_HAVE_CP
wsr a0, cpenable
#endif
@@ -152,6 +156,8 @@ _startup:
isync
+ initialize_mmu
+
/* Unpack data sections
*
* The linker script used to build the Linux kernel image
@@ -230,6 +236,7 @@ _startup:
should_never_return:
j should_never_return
+ENDPROC(_startup)
/*
* BSS section
@@ -239,6 +246,8 @@ __PAGE_ALIGNED_BSS
#ifdef CONFIG_MMU
ENTRY(swapper_pg_dir)
.fill PAGE_SIZE, 1, 0
+END(swapper_pg_dir)
#endif
ENTRY(empty_zero_page)
.fill PAGE_SIZE, 1, 0
+END(empty_zero_page)
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index a6ce3e56373..6f4f9749cff 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -18,6 +18,8 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel_stat.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
#include <asm/uaccess.h>
#include <asm/platform.h>
@@ -26,19 +28,22 @@ static unsigned int cached_irq_mask;
atomic_t irq_err_count;
+static struct irq_domain *root_domain;
+
/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
-asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
+asmlinkage void do_IRQ(int hwirq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
+ int irq = irq_find_mapping(root_domain, hwirq);
- if (irq >= NR_IRQS) {
+ if (hwirq >= NR_IRQS) {
printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
- __func__, irq);
+ __func__, hwirq);
}
irq_enter();
@@ -71,40 +76,39 @@ int arch_show_interrupts(struct seq_file *p, int prec)
static void xtensa_irq_mask(struct irq_data *d)
{
- cached_irq_mask &= ~(1 << d->irq);
+ cached_irq_mask &= ~(1 << d->hwirq);
set_sr (cached_irq_mask, intenable);
}
static void xtensa_irq_unmask(struct irq_data *d)
{
- cached_irq_mask |= 1 << d->irq;
+ cached_irq_mask |= 1 << d->hwirq;
set_sr (cached_irq_mask, intenable);
}
static void xtensa_irq_enable(struct irq_data *d)
{
- variant_irq_enable(d->irq);
+ variant_irq_enable(d->hwirq);
xtensa_irq_unmask(d);
}
static void xtensa_irq_disable(struct irq_data *d)
{
xtensa_irq_mask(d);
- variant_irq_disable(d->irq);
+ variant_irq_disable(d->hwirq);
}
static void xtensa_irq_ack(struct irq_data *d)
{
- set_sr(1 << d->irq, intclear);
+ set_sr(1 << d->hwirq, intclear);
}
static int xtensa_irq_retrigger(struct irq_data *d)
{
- set_sr (1 << d->irq, INTSET);
+ set_sr(1 << d->hwirq, intset);
return 1;
}
-
static struct irq_chip xtensa_irq_chip = {
.name = "xtensa",
.irq_enable = xtensa_irq_enable,
@@ -115,37 +119,99 @@ static struct irq_chip xtensa_irq_chip = {
.irq_retrigger = xtensa_irq_retrigger,
};
-void __init init_IRQ(void)
+static int xtensa_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
{
- int index;
-
- for (index = 0; index < XTENSA_NR_IRQS; index++) {
- int mask = 1 << index;
-
- if (mask & XCHAL_INTTYPE_MASK_SOFTWARE)
- irq_set_chip_and_handler(index, &xtensa_irq_chip,
- handle_simple_irq);
+ u32 mask = 1 << hw;
+
+ if (mask & XCHAL_INTTYPE_MASK_SOFTWARE) {
+ irq_set_chip_and_handler_name(irq, &xtensa_irq_chip,
+ handle_simple_irq, "level");
+ irq_set_status_flags(irq, IRQ_LEVEL);
+ } else if (mask & XCHAL_INTTYPE_MASK_EXTERN_EDGE) {
+ irq_set_chip_and_handler_name(irq, &xtensa_irq_chip,
+ handle_edge_irq, "edge");
+ irq_clear_status_flags(irq, IRQ_LEVEL);
+ } else if (mask & XCHAL_INTTYPE_MASK_EXTERN_LEVEL) {
+ irq_set_chip_and_handler_name(irq, &xtensa_irq_chip,
+ handle_level_irq, "level");
+ irq_set_status_flags(irq, IRQ_LEVEL);
+ } else if (mask & XCHAL_INTTYPE_MASK_TIMER) {
+ irq_set_chip_and_handler_name(irq, &xtensa_irq_chip,
+ handle_edge_irq, "edge");
+ irq_clear_status_flags(irq, IRQ_LEVEL);
+ } else {/* XCHAL_INTTYPE_MASK_WRITE_ERROR */
+ /* XCHAL_INTTYPE_MASK_NMI */
+
+ irq_set_chip_and_handler_name(irq, &xtensa_irq_chip,
+ handle_level_irq, "level");
+ irq_set_status_flags(irq, IRQ_LEVEL);
+ }
+ return 0;
+}
- else if (mask & XCHAL_INTTYPE_MASK_EXTERN_EDGE)
- irq_set_chip_and_handler(index, &xtensa_irq_chip,
- handle_edge_irq);
+static unsigned map_ext_irq(unsigned ext_irq)
+{
+ unsigned mask = XCHAL_INTTYPE_MASK_EXTERN_EDGE |
+ XCHAL_INTTYPE_MASK_EXTERN_LEVEL;
+ unsigned i;
- else if (mask & XCHAL_INTTYPE_MASK_EXTERN_LEVEL)
- irq_set_chip_and_handler(index, &xtensa_irq_chip,
- handle_level_irq);
+ for (i = 0; mask; ++i, mask >>= 1) {
+ if ((mask & 1) && ext_irq-- == 0)
+ return i;
+ }
+ return XCHAL_NUM_INTERRUPTS;
+}
- else if (mask & XCHAL_INTTYPE_MASK_TIMER)
- irq_set_chip_and_handler(index, &xtensa_irq_chip,
- handle_edge_irq);
+/*
+ * Device Tree IRQ specifier translation function which works with one or
+ * two cell bindings. First cell value maps directly to the hwirq number.
+ * Second cell if present specifies whether hwirq number is external (1) or
+ * internal (0).
+ */
+int xtensa_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ unsigned long *out_hwirq, unsigned int *out_type)
+{
+ if (WARN_ON(intsize < 1 || intsize > 2))
+ return -EINVAL;
+ if (intsize == 2 && intspec[1] == 1) {
+ unsigned int_irq = map_ext_irq(intspec[0]);
+ if (int_irq < XCHAL_NUM_INTERRUPTS)
+ *out_hwirq = int_irq;
+ else
+ return -EINVAL;
+ } else {
+ *out_hwirq = intspec[0];
+ }
+ *out_type = IRQ_TYPE_NONE;
+ return 0;
+}
- else /* XCHAL_INTTYPE_MASK_WRITE_ERROR */
- /* XCHAL_INTTYPE_MASK_NMI */
+static const struct irq_domain_ops xtensa_irq_domain_ops = {
+ .xlate = xtensa_irq_domain_xlate,
+ .map = xtensa_irq_map,
+};
- irq_set_chip_and_handler(index, &xtensa_irq_chip,
- handle_level_irq);
- }
+void __init init_IRQ(void)
+{
+ struct device_node *intc = NULL;
cached_irq_mask = 0;
+ set_sr(~0, intclear);
+
+#ifdef CONFIG_OF
+ /* The interrupt controller device node is mandatory */
+ intc = of_find_compatible_node(NULL, NULL, "xtensa,pic");
+ BUG_ON(!intc);
+
+ root_domain = irq_domain_add_linear(intc, NR_IRQS,
+ &xtensa_irq_domain_ops, NULL);
+#else
+ root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0,
+ &xtensa_irq_domain_ops, NULL);
+#endif
+ irq_set_default_host(root_domain);
variant_init_irq();
}
diff --git a/arch/xtensa/kernel/module.c b/arch/xtensa/kernel/module.c
index 451dda928c9..b715237bae6 100644
--- a/arch/xtensa/kernel/module.c
+++ b/arch/xtensa/kernel/module.c
@@ -53,7 +53,7 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
struct module *mod)
{
unsigned int i;
- Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
+ Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
Elf32_Sym *sym;
unsigned char *location;
uint32_t value;
diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
index 97230e46cbe..44bf21c3769 100644
--- a/arch/xtensa/kernel/platform.c
+++ b/arch/xtensa/kernel/platform.c
@@ -44,4 +44,3 @@ _F(void, calibrate_ccount, (void),
ccount_per_jiffy = 10 * (1000000UL/HZ);
});
#endif
-
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 1908f6642d3..0dd5784416d 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -45,6 +45,7 @@
#include <asm/regs.h>
extern void ret_from_fork(void);
+extern void ret_from_kernel_thread(void);
struct task_struct *current_set[NR_CPUS] = {&init_task, };
@@ -107,7 +108,7 @@ void coprocessor_flush_all(struct thread_info *ti)
void cpu_idle(void)
{
- local_irq_enable();
+ local_irq_enable();
/* endless idle loop with no priority at all */
while (1) {
@@ -158,18 +159,30 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
/*
* Copy thread.
*
+ * There are two modes in which this function is called:
+ * 1) Userspace thread creation,
+ * regs != NULL, usp_thread_fn is userspace stack pointer.
+ * It is expected to copy parent regs (in case CLONE_VM is not set
+ * in the clone_flags) and set up passed usp in the childregs.
+ * 2) Kernel thread creation,
+ * regs == NULL, usp_thread_fn is the function to run in the new thread
+ * and thread_fn_arg is its parameter.
+ * childregs are not used for the kernel threads.
+ *
* The stack layout for the new thread looks like this:
*
- * +------------------------+ <- sp in childregs (= tos)
+ * +------------------------+
* | childregs |
* +------------------------+ <- thread.sp = sp in dummy-frame
* | dummy-frame | (saved in dummy-frame spill-area)
* +------------------------+
*
- * We create a dummy frame to return to ret_from_fork:
- * a0 points to ret_from_fork (simulating a call4)
+ * We create a dummy frame to return to either ret_from_fork or
+ * ret_from_kernel_thread:
+ * a0 points to ret_from_fork/ret_from_kernel_thread (simulating a call4)
* sp points to itself (thread.sp)
- * a2, a3 are unused.
+ * a2, a3 are unused for userspace threads,
+ * a2 points to thread_fn, a3 holds thread_fn arg for kernel threads.
*
* Note: This is a pristine frame, so we don't need any spill region on top of
* childregs.
@@ -185,43 +198,62 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
* involved. Much simpler to just not copy those live frames across.
*/
-int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct * p, struct pt_regs * regs)
+int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
+ unsigned long thread_fn_arg, struct task_struct *p)
{
- struct pt_regs *childregs;
- unsigned long tos;
- int user_mode = user_mode(regs);
+ struct pt_regs *childregs = task_pt_regs(p);
#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
struct thread_info *ti;
#endif
- /* Set up new TSS. */
- tos = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- if (user_mode)
- childregs = (struct pt_regs*)(tos - PT_USER_SIZE);
- else
- childregs = (struct pt_regs*)tos - 1;
-
- /* This does not copy all the regs. In a bout of brilliance or madness,
- ARs beyond a0-a15 exist past the end of the struct. */
- *childregs = *regs;
-
/* Create a call4 dummy-frame: a0 = 0, a1 = childregs. */
*((int*)childregs - 3) = (unsigned long)childregs;
*((int*)childregs - 4) = 0;
- childregs->areg[2] = 0;
- p->set_child_tid = p->clear_child_tid = NULL;
- p->thread.ra = MAKE_RA_FOR_CALL((unsigned long)ret_from_fork, 0x1);
p->thread.sp = (unsigned long)childregs;
- if (user_mode(regs)) {
+ if (!(p->flags & PF_KTHREAD)) {
+ struct pt_regs *regs = current_pt_regs();
+ unsigned long usp = usp_thread_fn ?
+ usp_thread_fn : regs->areg[1];
+
+ p->thread.ra = MAKE_RA_FOR_CALL(
+ (unsigned long)ret_from_fork, 0x1);
+ /* This does not copy all the regs.
+ * In a bout of brilliance or madness,
+ * ARs beyond a0-a15 exist past the end of the struct.
+ */
+ *childregs = *regs;
childregs->areg[1] = usp;
+ childregs->areg[2] = 0;
+
+ /* When sharing memory with the parent thread, the child
+ usually starts on a pristine stack, so we have to reset
+ windowbase, windowstart and wmask.
+ (Note that such a new thread is required to always create
+ an initial call4 frame)
+ The exception is vfork, where the new thread continues to
+ run on the parent's stack until it calls execve. This could
+ be a call8 or call12, which requires a legal stack frame
+ of the previous caller for the overflow handlers to work.
+ (Note that it's always legal to overflow live registers).
+ In this case, ensure to spill at least the stack pointer
+ of that frame. */
+
if (clone_flags & CLONE_VM) {
- childregs->wmask = 1; /* can't share live windows */
+ /* check that caller window is live and same stack */
+ int len = childregs->wmask & ~0xf;
+ if (regs->areg[1] == usp && len != 0) {
+ int callinc = (regs->areg[0] >> 30) & 3;
+ int caller_ars = XCHAL_NUM_AREGS - callinc * 4;
+ put_user(regs->areg[caller_ars+1],
+ (unsigned __user*)(usp - 12));
+ }
+ childregs->wmask = 1;
+ childregs->windowstart = 1;
+ childregs->windowbase = 0;
} else {
int len = childregs->wmask & ~0xf;
memcpy(&childregs->areg[XCHAL_NUM_AREGS - len/4],
@@ -230,11 +262,19 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
// FIXME: we need to set THREADPTR in thread_info...
if (clone_flags & CLONE_SETTLS)
childregs->areg[2] = childregs->areg[6];
-
} else {
- /* In kernel space, we start a new thread with a new stack. */
- childregs->wmask = 1;
- childregs->areg[1] = tos;
+ p->thread.ra = MAKE_RA_FOR_CALL(
+ (unsigned long)ret_from_kernel_thread, 1);
+
+ /* pass parameters to ret_from_kernel_thread:
+ * a2 = thread_fn, a3 = thread_fn arg
+ */
+ *((int *)childregs - 1) = thread_fn_arg;
+ *((int *)childregs - 2) = usp_thread_fn;
+
+ /* Childregs are only used when we're going to userspace
+ * in which case start_thread will set them up.
+ */
}
#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
@@ -323,39 +363,3 @@ int dump_fpu(void)
{
return 0;
}
-
-asmlinkage
-long xtensa_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tid, void *child_tls,
- void __user *child_tid, long a5,
- struct pt_regs *regs)
-{
- if (!newsp)
- newsp = regs->areg[1];
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
-}
-
-/*
- * xtensa_execve() executes a new program.
- */
-
-asmlinkage
-long xtensa_execve(const char __user *name,
- const char __user *const __user *argv,
- const char __user *const __user *envp,
- long a3, long a4, long a5,
- struct pt_regs *regs)
-{
- long error;
- struct filename *filename;
-
- filename = getname(name);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
-out:
- return error;
-}
-
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index 33eea4c16f1..61fb2e9e903 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -154,7 +154,7 @@ int ptrace_setxregs(struct task_struct *child, void __user *uregs)
coprocessor_flush_all(ti);
coprocessor_release_all(ti);
- ret |= __copy_from_user(&ti->xtregs_cp, &xtregs->cp0,
+ ret |= __copy_from_user(&ti->xtregs_cp, &xtregs->cp0,
sizeof(xtregs_coprocessor_t));
#endif
ret |= __copy_from_user(&regs->xtregs_opt, &xtregs->opt,
@@ -343,4 +343,3 @@ void do_syscall_trace_leave(struct pt_regs *regs)
&& (current->ptrace & PT_PTRACED))
do_syscall_trace();
}
-
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index b237988ba6d..24c1a57abb4 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -22,6 +22,11 @@
#include <linux/bootmem.h>
#include <linux/kernel.h>
+#ifdef CONFIG_OF
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+#endif
+
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
# include <linux/console.h>
#endif
@@ -42,6 +47,7 @@
#include <asm/page.h>
#include <asm/setup.h>
#include <asm/param.h>
+#include <asm/traps.h>
#include <platform/hardware.h>
@@ -64,6 +70,11 @@ int initrd_is_mapped = 0;
extern int initrd_below_start_ok;
#endif
+#ifdef CONFIG_OF
+extern u32 __dtb_start[];
+void *dtb_start = __dtb_start;
+#endif
+
unsigned char aux_device_present;
extern unsigned long loops_per_jiffy;
@@ -83,6 +94,8 @@ extern void init_mmu(void);
static inline void init_mmu(void) { }
#endif
+extern int mem_reserve(unsigned long, unsigned long, int);
+extern void bootmem_init(void);
extern void zones_init(void);
/*
@@ -104,28 +117,33 @@ typedef struct tagtable {
/* parse current tag */
-static int __init parse_tag_mem(const bp_tag_t *tag)
+static int __init add_sysmem_bank(unsigned long type, unsigned long start,
+ unsigned long end)
{
- meminfo_t *mi = (meminfo_t*)(tag->data);
-
- if (mi->type != MEMORY_TYPE_CONVENTIONAL)
- return -1;
-
if (sysmem.nr_banks >= SYSMEM_BANKS_MAX) {
printk(KERN_WARNING
- "Ignoring memory bank 0x%08lx size %ldKB\n",
- (unsigned long)mi->start,
- (unsigned long)mi->end - (unsigned long)mi->start);
+ "Ignoring memory bank 0x%08lx size %ldKB\n",
+ start, end - start);
return -EINVAL;
}
- sysmem.bank[sysmem.nr_banks].type = mi->type;
- sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(mi->start);
- sysmem.bank[sysmem.nr_banks].end = mi->end & PAGE_MASK;
+ sysmem.bank[sysmem.nr_banks].type = type;
+ sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(start);
+ sysmem.bank[sysmem.nr_banks].end = end & PAGE_MASK;
sysmem.nr_banks++;
return 0;
}
+static int __init parse_tag_mem(const bp_tag_t *tag)
+{
+ meminfo_t *mi = (meminfo_t *)(tag->data);
+
+ if (mi->type != MEMORY_TYPE_CONVENTIONAL)
+ return -1;
+
+ return add_sysmem_bank(mi->type, mi->start, mi->end);
+}
+
__tagtable(BP_TAG_MEMORY, parse_tag_mem);
#ifdef CONFIG_BLK_DEV_INITRD
@@ -142,12 +160,31 @@ static int __init parse_tag_initrd(const bp_tag_t* tag)
__tagtable(BP_TAG_INITRD, parse_tag_initrd);
+#ifdef CONFIG_OF
+
+static int __init parse_tag_fdt(const bp_tag_t *tag)
+{
+ dtb_start = (void *)(tag->data[0]);
+ return 0;
+}
+
+__tagtable(BP_TAG_FDT, parse_tag_fdt);
+
+void __init early_init_dt_setup_initrd_arch(unsigned long start,
+ unsigned long end)
+{
+ initrd_start = (void *)__va(start);
+ initrd_end = (void *)__va(end);
+ initrd_below_start_ok = 1;
+}
+
+#endif /* CONFIG_OF */
+
#endif /* CONFIG_BLK_DEV_INITRD */
static int __init parse_tag_cmdline(const bp_tag_t* tag)
{
- strncpy(command_line, (char*)(tag->data), COMMAND_LINE_SIZE);
- command_line[COMMAND_LINE_SIZE - 1] = '\0';
+ strlcpy(command_line, (char *)(tag->data), COMMAND_LINE_SIZE);
return 0;
}
@@ -185,6 +222,58 @@ static int __init parse_bootparam(const bp_tag_t* tag)
return 0;
}
+#ifdef CONFIG_OF
+
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+ size &= PAGE_MASK;
+ add_sysmem_bank(MEMORY_TYPE_CONVENTIONAL, base, base + size);
+}
+
+void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+ return __alloc_bootmem(size, align, 0);
+}
+
+void __init early_init_devtree(void *params)
+{
+ /* Setup flat device-tree pointer */
+ initial_boot_params = params;
+
+ /* Retrieve various informations from the /chosen node of the
+ * device-tree, including the platform type, initrd location and
+ * size, TCE reserve, and more ...
+ */
+ if (!command_line[0])
+ of_scan_flat_dt(early_init_dt_scan_chosen, command_line);
+
+ /* Scan memory nodes and rebuild MEMBLOCKs */
+ of_scan_flat_dt(early_init_dt_scan_root, NULL);
+ if (sysmem.nr_banks == 0)
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+}
+
+static void __init copy_devtree(void)
+{
+ void *alloc = early_init_dt_alloc_memory_arch(
+ be32_to_cpu(initial_boot_params->totalsize), 0);
+ if (alloc) {
+ memcpy(alloc, initial_boot_params,
+ be32_to_cpu(initial_boot_params->totalsize));
+ initial_boot_params = alloc;
+ }
+}
+
+static int __init xtensa_device_probe(void)
+{
+ of_platform_populate(NULL, NULL, NULL, NULL);
+ return 0;
+}
+
+device_initcall(xtensa_device_probe);
+
+#endif /* CONFIG_OF */
+
/*
* Initialize architecture. (Early stage)
*/
@@ -193,14 +282,14 @@ void __init init_arch(bp_tag_t *bp_start)
{
sysmem.nr_banks = 0;
-#ifdef CONFIG_CMDLINE_BOOL
- strcpy(command_line, default_command_line);
-#endif
-
/* Parse boot parameters */
- if (bp_start)
- parse_bootparam(bp_start);
+ if (bp_start)
+ parse_bootparam(bp_start);
+
+#ifdef CONFIG_OF
+ early_init_devtree(dtb_start);
+#endif
if (sysmem.nr_banks == 0) {
sysmem.nr_banks = 1;
@@ -209,6 +298,11 @@ void __init init_arch(bp_tag_t *bp_start)
+ PLATFORM_DEFAULT_MEM_SIZE;
}
+#ifdef CONFIG_CMDLINE_BOOL
+ if (!command_line[0])
+ strlcpy(command_line, default_command_line, COMMAND_LINE_SIZE);
+#endif
+
/* Early hook for platforms */
platform_init(bp_start);
@@ -235,15 +329,130 @@ extern char _UserExceptionVector_text_end;
extern char _DoubleExceptionVector_literal_start;
extern char _DoubleExceptionVector_text_end;
-void __init setup_arch(char **cmdline_p)
+
+#ifdef CONFIG_S32C1I_SELFTEST
+#if XCHAL_HAVE_S32C1I
+
+static int __initdata rcw_word, rcw_probe_pc, rcw_exc;
+
+/*
+ * Basic atomic compare-and-swap, that records PC of S32C1I for probing.
+ *
+ * If *v == cmp, set *v = set. Return previous *v.
+ */
+static inline int probed_compare_swap(int *v, int cmp, int set)
+{
+ int tmp;
+
+ __asm__ __volatile__(
+ " movi %1, 1f\n"
+ " s32i %1, %4, 0\n"
+ " wsr %2, scompare1\n"
+ "1: s32c1i %0, %3, 0\n"
+ : "=a" (set), "=&a" (tmp)
+ : "a" (cmp), "a" (v), "a" (&rcw_probe_pc), "0" (set)
+ : "memory"
+ );
+ return set;
+}
+
+/* Handle probed exception */
+
+void __init do_probed_exception(struct pt_regs *regs, unsigned long exccause)
+{
+ if (regs->pc == rcw_probe_pc) { /* exception on s32c1i ? */
+ regs->pc += 3; /* skip the s32c1i instruction */
+ rcw_exc = exccause;
+ } else {
+ do_unhandled(regs, exccause);
+ }
+}
+
+/* Simple test of S32C1I (soc bringup assist) */
+
+void __init check_s32c1i(void)
+{
+ int n, cause1, cause2;
+ void *handbus, *handdata, *handaddr; /* temporarily saved handlers */
+
+ rcw_probe_pc = 0;
+ handbus = trap_set_handler(EXCCAUSE_LOAD_STORE_ERROR,
+ do_probed_exception);
+ handdata = trap_set_handler(EXCCAUSE_LOAD_STORE_DATA_ERROR,
+ do_probed_exception);
+ handaddr = trap_set_handler(EXCCAUSE_LOAD_STORE_ADDR_ERROR,
+ do_probed_exception);
+
+ /* First try an S32C1I that does not store: */
+ rcw_exc = 0;
+ rcw_word = 1;
+ n = probed_compare_swap(&rcw_word, 0, 2);
+ cause1 = rcw_exc;
+
+ /* took exception? */
+ if (cause1 != 0) {
+ /* unclean exception? */
+ if (n != 2 || rcw_word != 1)
+ panic("S32C1I exception error");
+ } else if (rcw_word != 1 || n != 1) {
+ panic("S32C1I compare error");
+ }
+
+ /* Then an S32C1I that stores: */
+ rcw_exc = 0;
+ rcw_word = 0x1234567;
+ n = probed_compare_swap(&rcw_word, 0x1234567, 0xabcde);
+ cause2 = rcw_exc;
+
+ if (cause2 != 0) {
+ /* unclean exception? */
+ if (n != 0xabcde || rcw_word != 0x1234567)
+ panic("S32C1I exception error (b)");
+ } else if (rcw_word != 0xabcde || n != 0x1234567) {
+ panic("S32C1I store error");
+ }
+
+ /* Verify consistency of exceptions: */
+ if (cause1 || cause2) {
+ pr_warn("S32C1I took exception %d, %d\n", cause1, cause2);
+ /* If emulation of S32C1I upon bus error gets implemented,
+ we can get rid of this panic for single core (not SMP) */
+ panic("S32C1I exceptions not currently supported");
+ }
+ if (cause1 != cause2)
+ panic("inconsistent S32C1I exceptions");
+
+ trap_set_handler(EXCCAUSE_LOAD_STORE_ERROR, handbus);
+ trap_set_handler(EXCCAUSE_LOAD_STORE_DATA_ERROR, handdata);
+ trap_set_handler(EXCCAUSE_LOAD_STORE_ADDR_ERROR, handaddr);
+}
+
+#else /* XCHAL_HAVE_S32C1I */
+
+/* This condition should not occur with a commercially deployed processor.
+ Display reminder for early engr test or demo chips / FPGA bitstreams */
+void __init check_s32c1i(void)
+{
+ pr_warn("Processor configuration lacks atomic compare-and-swap support!\n");
+}
+
+#endif /* XCHAL_HAVE_S32C1I */
+#else /* CONFIG_S32C1I_SELFTEST */
+
+void __init check_s32c1i(void)
{
- extern int mem_reserve(unsigned long, unsigned long, int);
- extern void bootmem_init(void);
+}
+
+#endif /* CONFIG_S32C1I_SELFTEST */
- memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
- boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
+
+void __init setup_arch(char **cmdline_p)
+{
+ strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
+ check_s32c1i();
+
/* Reserve some memory regions */
#ifdef CONFIG_BLK_DEV_INITRD
@@ -251,7 +460,7 @@ void __init setup_arch(char **cmdline_p)
initrd_is_mapped = mem_reserve(__pa(initrd_start),
__pa(initrd_end), 0);
initrd_below_start_ok = 1;
- } else {
+ } else {
initrd_start = 0;
}
#endif
@@ -275,8 +484,12 @@ void __init setup_arch(char **cmdline_p)
bootmem_init();
- platform_setup(cmdline_p);
+#ifdef CONFIG_OF
+ copy_devtree();
+ unflatten_device_tree();
+#endif
+ platform_setup(cmdline_p);
paging_init();
zones_init();
@@ -326,7 +539,7 @@ c_show(struct seq_file *f, void *slot)
"core ID\t\t: " XCHAL_CORE_ID "\n"
"build ID\t: 0x%x\n"
"byte order\t: %s\n"
- "cpu MHz\t\t: %lu.%02lu\n"
+ "cpu MHz\t\t: %lu.%02lu\n"
"bogomips\t: %lu.%02lu\n",
XCHAL_BUILD_UNIQUE_ID,
XCHAL_HAVE_BE ? "big" : "little",
@@ -381,6 +594,9 @@ c_show(struct seq_file *f, void *slot)
#if XCHAL_HAVE_FP
"fpu "
#endif
+#if XCHAL_HAVE_S32C1I
+ "s32c1i "
+#endif
"\n");
/* Registers. */
@@ -412,7 +628,7 @@ c_show(struct seq_file *f, void *slot)
"icache size\t: %d\n"
"icache flags\t: "
#if XCHAL_ICACHE_LINE_LOCKABLE
- "lock"
+ "lock "
#endif
"\n"
"dcache line size: %d\n"
@@ -420,10 +636,10 @@ c_show(struct seq_file *f, void *slot)
"dcache size\t: %d\n"
"dcache flags\t: "
#if XCHAL_DCACHE_IS_WRITEBACK
- "writeback"
+ "writeback "
#endif
#if XCHAL_DCACHE_LINE_LOCKABLE
- "lock"
+ "lock "
#endif
"\n",
XCHAL_ICACHE_LINESIZE,
@@ -465,4 +681,3 @@ const struct seq_operations cpuinfo_op =
};
#endif /* CONFIG_PROC_FS */
-
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 63c566f627b..de34d6be91c 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -212,7 +212,7 @@ restore_sigcontext(struct pt_regs *regs, struct rt_sigframe __user *frame)
if (err)
return err;
- /* The signal handler may have used coprocessors in which
+ /* The signal handler may have used coprocessors in which
* case they are still enabled. We disable them to force a
* reloading of the original task's CP state by the lazy
* context-switching mechanisms of CP exception handling.
@@ -396,7 +396,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
*/
/* Set up registers for signal handler */
- start_thread(regs, (unsigned long) ka->sa.sa_handler,
+ start_thread(regs, (unsigned long) ka->sa.sa_handler,
(unsigned long) frame);
/* Set up a stack frame for a call4
@@ -424,9 +424,9 @@ give_sigsegv:
return -EFAULT;
}
-asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
+asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
stack_t __user *uoss,
- long a2, long a3, long a4, long a5,
+ long a2, long a3, long a4, long a5,
struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->areg[1]);
diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
index a5c01e74d5d..54fa8425cee 100644
--- a/arch/xtensa/kernel/syscall.c
+++ b/arch/xtensa/kernel/syscall.c
@@ -32,10 +32,8 @@ typedef void (*syscall_t)(void);
syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= {
[0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall,
-#undef __SYSCALL
#define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol,
-#undef __KERNEL_SYSCALLS__
-#include <asm/unistd.h>
+#include <uapi/asm/unistd.h>
};
asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
@@ -49,8 +47,8 @@ asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
return (long)ret;
}
-asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len)
+asmlinkage long xtensa_fadvise64_64(int fd, int advice,
+ unsigned long long offset, unsigned long long len)
{
return sys_fadvise64_64(fd, offset, len, advice);
}
-
diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c
index ac62f9cf1e1..ffb47410431 100644
--- a/arch/xtensa/kernel/time.c
+++ b/arch/xtensa/kernel/time.c
@@ -22,6 +22,7 @@
#include <linux/irq.h>
#include <linux/profile.h>
#include <linux/delay.h>
+#include <linux/irqdomain.h>
#include <asm/timex.h>
#include <asm/platform.h>
@@ -31,7 +32,7 @@ unsigned long ccount_per_jiffy; /* per 1/HZ */
unsigned long nsec_per_ccount; /* nsec per ccount increment */
#endif
-static cycle_t ccount_read(void)
+static cycle_t ccount_read(struct clocksource *cs)
{
return (cycle_t)get_ccount();
}
@@ -52,6 +53,7 @@ static struct irqaction timer_irqaction = {
void __init time_init(void)
{
+ unsigned int irq;
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
printk("Calibrating CPU frequency ");
platform_calibrate_ccount();
@@ -62,7 +64,8 @@ void __init time_init(void)
/* Initialize the linux timer interrupt. */
- setup_irq(LINUX_TIMER_INT, &timer_irqaction);
+ irq = irq_create_mapping(NULL, LINUX_TIMER_INT);
+ setup_irq(irq, &timer_irqaction);
set_linux_timer(get_ccount() + CCOUNT_PER_JIFFY);
}
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index 5caf2b64d43..01e0111bf78 100644
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -293,6 +293,17 @@ do_debug(struct pt_regs *regs)
}
+/* Set exception C handler - for temporary use when probing exceptions */
+
+void * __init trap_set_handler(int cause, void *handler)
+{
+ unsigned long *entry = &exc_table[EXC_TABLE_DEFAULT / 4 + cause];
+ void *previous = (void *)*entry;
+ *entry = (unsigned long)handler;
+ return previous;
+}
+
+
/*
* Initialize dispatch tables.
*
@@ -397,7 +408,8 @@ static inline void spill_registers(void)
"wsr a13, sar\n\t"
"wsr a14, ps\n\t"
:: "a" (&a0), "a" (&ps)
- : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", "memory");
+ : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
+ "memory");
}
void show_trace(struct task_struct *task, unsigned long *sp)
@@ -452,7 +464,7 @@ void show_stack(struct task_struct *task, unsigned long *sp)
if (!sp)
sp = stack_pointer(task);
- stack = sp;
+ stack = sp;
printk("\nStack: ");
@@ -523,5 +535,3 @@ void die(const char * str, struct pt_regs * regs, long err)
do_exit(err);
}
-
-
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S
index 4462c1e595c..68df35f66ce 100644
--- a/arch/xtensa/kernel/vectors.S
+++ b/arch/xtensa/kernel/vectors.S
@@ -79,6 +79,8 @@ ENTRY(_UserExceptionVector)
l32i a0, a0, EXC_TABLE_FAST_USER # load handler
jx a0
+ENDPROC(_UserExceptionVector)
+
/*
* Kernel exception vector. (Exceptions with PS.UM == 0, PS.EXCM == 0)
*
@@ -103,6 +105,7 @@ ENTRY(_KernelExceptionVector)
l32i a0, a0, EXC_TABLE_FAST_KERNEL # load handler address
jx a0
+ENDPROC(_KernelExceptionVector)
/*
* Double exception vector (Exceptions with PS.EXCM == 1)
@@ -225,7 +228,13 @@ ENTRY(_DoubleExceptionVector)
/* Window overflow/underflow exception. Get stack pointer. */
mov a3, a2
- movi a2, exc_table
+ /* This explicit literal and the following references to it are made
+ * in order to fit DoubleExceptionVector.literals into the available
+ * 16-byte gap before DoubleExceptionVector.text in the absence of
+ * link time relaxation. See kernel/vmlinux.lds.S
+ */
+ .literal .Lexc_table, exc_table
+ l32r a2, .Lexc_table
l32i a2, a2, EXC_TABLE_KSTK
/* Check for overflow/underflow exception, jump if overflow. */
@@ -255,7 +264,7 @@ ENTRY(_DoubleExceptionVector)
s32i a0, a2, PT_AREG0
wsr a3, excsave1 # save a3
- movi a3, exc_table
+ l32r a3, .Lexc_table
rsr a0, exccause
s32i a0, a2, PT_DEPC # mark it as a regular exception
@@ -267,7 +276,7 @@ ENTRY(_DoubleExceptionVector)
/* a0: depc, a1: a1, a2: a2, a3: trashed, depc: a0, excsave1: a3 */
- movi a3, exc_table
+ l32r a3, .Lexc_table
s32i a2, a3, EXC_TABLE_DOUBLE_SAVE # temporary variable
/* Enter critical section. */
@@ -296,7 +305,7 @@ ENTRY(_DoubleExceptionVector)
/* a0: avail, a1: a1, a2: kstk, a3: avail, depc: a2, excsave: a3 */
- movi a3, exc_table
+ l32r a3, .Lexc_table
rsr a0, exccause
addx4 a0, a0, a3
l32i a0, a0, EXC_TABLE_FAST_USER
@@ -338,6 +347,7 @@ ENTRY(_DoubleExceptionVector)
.end literal_prefix
+ENDPROC(_DoubleExceptionVector)
/*
* Debug interrupt vector
@@ -349,9 +359,11 @@ ENTRY(_DoubleExceptionVector)
.section .DebugInterruptVector.text, "ax"
ENTRY(_DebugInterruptVector)
+
xsr a0, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
jx a0
+ENDPROC(_DebugInterruptVector)
/* Window overflow and underflow handlers.
@@ -363,38 +375,43 @@ ENTRY(_DebugInterruptVector)
* we try to access any page that would cause a page fault early.
*/
+#define ENTRY_ALIGN64(name) \
+ .globl name; \
+ .align 64; \
+ name:
+
.section .WindowVectors.text, "ax"
/* 4-Register Window Overflow Vector (Handler) */
- .align 64
-.global _WindowOverflow4
-_WindowOverflow4:
+ENTRY_ALIGN64(_WindowOverflow4)
+
s32e a0, a5, -16
s32e a1, a5, -12
s32e a2, a5, -8
s32e a3, a5, -4
rfwo
+ENDPROC(_WindowOverflow4)
+
/* 4-Register Window Underflow Vector (Handler) */
- .align 64
-.global _WindowUnderflow4
-_WindowUnderflow4:
+ENTRY_ALIGN64(_WindowUnderflow4)
+
l32e a0, a5, -16
l32e a1, a5, -12
l32e a2, a5, -8
l32e a3, a5, -4
rfwu
+ENDPROC(_WindowUnderflow4)
/* 8-Register Window Overflow Vector (Handler) */
- .align 64
-.global _WindowOverflow8
-_WindowOverflow8:
+ENTRY_ALIGN64(_WindowOverflow8)
+
s32e a0, a9, -16
l32e a0, a1, -12
s32e a2, a9, -8
@@ -406,11 +423,12 @@ _WindowOverflow8:
s32e a7, a0, -20
rfwo
+ENDPROC(_WindowOverflow8)
+
/* 8-Register Window Underflow Vector (Handler) */
- .align 64
-.global _WindowUnderflow8
-_WindowUnderflow8:
+ENTRY_ALIGN64(_WindowUnderflow8)
+
l32e a1, a9, -12
l32e a0, a9, -16
l32e a7, a1, -12
@@ -422,12 +440,12 @@ _WindowUnderflow8:
l32e a7, a7, -20
rfwu
+ENDPROC(_WindowUnderflow8)
/* 12-Register Window Overflow Vector (Handler) */
- .align 64
-.global _WindowOverflow12
-_WindowOverflow12:
+ENTRY_ALIGN64(_WindowOverflow12)
+
s32e a0, a13, -16
l32e a0, a1, -12
s32e a1, a13, -12
@@ -443,11 +461,12 @@ _WindowOverflow12:
s32e a11, a0, -20
rfwo
+ENDPROC(_WindowOverflow12)
+
/* 12-Register Window Underflow Vector (Handler) */
- .align 64
-.global _WindowUnderflow12
-_WindowUnderflow12:
+ENTRY_ALIGN64(_WindowUnderflow12)
+
l32e a1, a13, -12
l32e a0, a13, -16
l32e a11, a1, -12
@@ -463,6 +482,6 @@ _WindowUnderflow12:
l32e a11, a11, -20
rfwu
- .text
-
+ENDPROC(_WindowUnderflow12)
+ .text
diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c
index a8b9f1fd1e1..afe058b24e6 100644
--- a/arch/xtensa/kernel/xtensa_ksyms.c
+++ b/arch/xtensa/kernel/xtensa_ksyms.c
@@ -43,7 +43,6 @@ EXPORT_SYMBOL(__strncpy_user);
EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL(copy_page);
-EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(empty_zero_page);
/*
diff --git a/arch/xtensa/lib/checksum.S b/arch/xtensa/lib/checksum.S
index df397f932d0..4eb573d2720 100644
--- a/arch/xtensa/lib/checksum.S
+++ b/arch/xtensa/lib/checksum.S
@@ -41,10 +41,11 @@
.text
ENTRY(csum_partial)
- /*
- * Experiments with Ethernet and SLIP connections show that buf
- * is aligned on either a 2-byte or 4-byte boundary.
- */
+
+ /*
+ * Experiments with Ethernet and SLIP connections show that buf
+ * is aligned on either a 2-byte or 4-byte boundary.
+ */
entry sp, 32
extui a5, a2, 0, 2
bnez a5, 8f /* branch if 2-byte aligned */
@@ -170,7 +171,7 @@ ENTRY(csum_partial)
3:
j 5b /* branch to handle the remaining byte */
-
+ENDPROC(csum_partial)
/*
* Copy from ds while checksumming, otherwise like csum_partial
@@ -211,6 +212,7 @@ unsigned int csum_partial_copy_generic (const char *src, char *dst, int len,
*/
ENTRY(csum_partial_copy_generic)
+
entry sp, 32
mov a12, a3
mov a11, a4
@@ -367,6 +369,8 @@ DST( s8i a8, a3, 1 )
6:
j 4b /* process the possible trailing odd byte */
+ENDPROC(csum_partial_copy_generic)
+
# Exception handler:
.section .fixup, "ax"
@@ -406,4 +410,3 @@ DST( s8i a8, a3, 1 )
retw
.previous
-
diff --git a/arch/xtensa/lib/memcopy.S b/arch/xtensa/lib/memcopy.S
index c48b80acb5f..b1c219acabe 100644
--- a/arch/xtensa/lib/memcopy.S
+++ b/arch/xtensa/lib/memcopy.S
@@ -210,8 +210,10 @@ memcpy:
_beqz a4, .Ldone # avoid loading anything for zero-length copies
# copy 16 bytes per iteration for word-aligned dst and unaligned src
ssa8 a3 # set shift amount from byte offset
-#define SIM_CHECKS_ALIGNMENT 1 /* set to 1 when running on ISS (simulator) with the
- lint or ferret client, or 0 to save a few cycles */
+
+/* set to 1 when running on ISS (simulator) with the
+ lint or ferret client, or 0 to save a few cycles */
+#define SIM_CHECKS_ALIGNMENT 1
#if XCHAL_UNALIGNED_LOAD_EXCEPTION || SIM_CHECKS_ALIGNMENT
and a11, a3, a8 # save unalignment offset for below
sub a3, a3, a11 # align a3
diff --git a/arch/xtensa/lib/pci-auto.c b/arch/xtensa/lib/pci-auto.c
index a71733ae119..34d05abbd92 100644
--- a/arch/xtensa/lib/pci-auto.c
+++ b/arch/xtensa/lib/pci-auto.c
@@ -241,8 +241,8 @@ int __init pciauto_bus_scan(struct pci_controller *pci_ctrl, int current_bus)
unsigned char header_type;
struct pci_dev *dev = &pciauto_dev;
- pciauto_dev.bus = &pciauto_bus;
- pciauto_dev.sysdata = pci_ctrl;
+ pciauto_dev.bus = &pciauto_bus;
+ pciauto_dev.sysdata = pci_ctrl;
pciauto_bus.ops = pci_ctrl->ops;
/*
@@ -345,8 +345,3 @@ int __init pciauto_bus_scan(struct pci_controller *pci_ctrl, int current_bus)
}
return sub_bus;
}
-
-
-
-
-
diff --git a/arch/xtensa/lib/strncpy_user.S b/arch/xtensa/lib/strncpy_user.S
index 9f603cdaaa6..1ad0ecf4536 100644
--- a/arch/xtensa/lib/strncpy_user.S
+++ b/arch/xtensa/lib/strncpy_user.S
@@ -166,7 +166,7 @@ __strncpy_user:
retw
.Lz1: # byte 1 is zero
#ifdef __XTENSA_EB__
- extui a9, a9, 16, 16
+ extui a9, a9, 16, 16
#endif /* __XTENSA_EB__ */
EX(s16i, a9, a11, 0, fixup_s)
addi a11, a11, 1 # advance dst pointer
@@ -174,7 +174,7 @@ __strncpy_user:
retw
.Lz2: # byte 2 is zero
#ifdef __XTENSA_EB__
- extui a9, a9, 16, 16
+ extui a9, a9, 16, 16
#endif /* __XTENSA_EB__ */
EX(s16i, a9, a11, 0, fixup_s)
movi a9, 0
diff --git a/arch/xtensa/lib/strnlen_user.S b/arch/xtensa/lib/strnlen_user.S
index 23f2a89816a..4c03b1e581e 100644
--- a/arch/xtensa/lib/strnlen_user.S
+++ b/arch/xtensa/lib/strnlen_user.S
@@ -145,4 +145,3 @@ __strnlen_user:
lenfixup:
movi a2, 0
retw
-
diff --git a/arch/xtensa/lib/usercopy.S b/arch/xtensa/lib/usercopy.S
index 46d60314bb1..ace1892a875 100644
--- a/arch/xtensa/lib/usercopy.S
+++ b/arch/xtensa/lib/usercopy.S
@@ -318,4 +318,3 @@ l_fixup:
/* Ignore memset return value in a6. */
/* a2 still contains bytes not copied. */
retw
-
diff --git a/arch/xtensa/mm/cache.c b/arch/xtensa/mm/cache.c
index 85df4655d32..81edeab82d1 100644
--- a/arch/xtensa/mm/cache.c
+++ b/arch/xtensa/mm/cache.c
@@ -118,7 +118,7 @@ void flush_dcache_page(struct page *page)
* For now, flush the whole cache. FIXME??
*/
-void flush_cache_range(struct vm_area_struct* vma,
+void flush_cache_range(struct vm_area_struct* vma,
unsigned long start, unsigned long end)
{
__flush_invalidate_dcache_all();
@@ -133,7 +133,7 @@ void flush_cache_range(struct vm_area_struct* vma,
*/
void flush_cache_page(struct vm_area_struct* vma, unsigned long address,
- unsigned long pfn)
+ unsigned long pfn)
{
/* Note that we have to use the 'alias' address to avoid multi-hit */
@@ -166,14 +166,14 @@ update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t *ptep)
if (!PageReserved(page) && test_bit(PG_arch_1, &page->flags)) {
- unsigned long vaddr = TLBTEMP_BASE_1 + (addr & DCACHE_ALIAS_MASK);
unsigned long paddr = (unsigned long) page_address(page);
unsigned long phys = page_to_phys(page);
+ unsigned long tmp = TLBTEMP_BASE_1 + (addr & DCACHE_ALIAS_MASK);
__flush_invalidate_dcache_page(paddr);
- __flush_invalidate_dcache_page_alias(vaddr, phys);
- __invalidate_icache_page_alias(vaddr, phys);
+ __flush_invalidate_dcache_page_alias(tmp, phys);
+ __invalidate_icache_page_alias(tmp, phys);
clear_bit(PG_arch_1, &page->flags);
}
@@ -195,7 +195,7 @@ update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t *ptep)
#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
-void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
+void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
@@ -205,8 +205,8 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
/* Flush and invalidate user page if aliased. */
if (alias) {
- unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
- __flush_invalidate_dcache_page_alias(temp, phys);
+ unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+ __flush_invalidate_dcache_page_alias(t, phys);
}
/* Copy data */
@@ -219,12 +219,11 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
*/
if (alias) {
- unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+ unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
__flush_invalidate_dcache_range((unsigned long) dst, len);
- if ((vma->vm_flags & VM_EXEC) != 0) {
- __invalidate_icache_page_alias(temp, phys);
- }
+ if ((vma->vm_flags & VM_EXEC) != 0)
+ __invalidate_icache_page_alias(t, phys);
} else if ((vma->vm_flags & VM_EXEC) != 0) {
__flush_dcache_range((unsigned long)dst,len);
@@ -245,8 +244,8 @@ extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
*/
if (alias) {
- unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
- __flush_invalidate_dcache_page_alias(temp, phys);
+ unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+ __flush_invalidate_dcache_page_alias(t, phys);
}
memcpy(dst, src, len);
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
index 245b08f7eaf..4b7bc8db170 100644
--- a/arch/xtensa/mm/fault.c
+++ b/arch/xtensa/mm/fault.c
@@ -254,4 +254,3 @@ bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
die("Oops", regs, sig);
do_exit(sig);
}
-
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index db955179da2..7a5156ffebb 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -75,15 +75,15 @@ int __init mem_reserve(unsigned long start, unsigned long end, int must_exist)
sysmem.nr_banks++;
}
sysmem.bank[i].end = start;
+
+ } else if (end < sysmem.bank[i].end) {
+ sysmem.bank[i].start = end;
+
} else {
- if (end < sysmem.bank[i].end)
- sysmem.bank[i].start = end;
- else {
- /* remove entry */
- sysmem.nr_banks--;
- sysmem.bank[i].start = sysmem.bank[sysmem.nr_banks].start;
- sysmem.bank[i].end = sysmem.bank[sysmem.nr_banks].end;
- }
+ /* remove entry */
+ sysmem.nr_banks--;
+ sysmem.bank[i].start = sysmem.bank[sysmem.nr_banks].start;
+ sysmem.bank[i].end = sysmem.bank[sysmem.nr_banks].end;
}
return -1;
}
diff --git a/arch/xtensa/mm/misc.S b/arch/xtensa/mm/misc.S
index b048406d875..d97ed1ba7b0 100644
--- a/arch/xtensa/mm/misc.S
+++ b/arch/xtensa/mm/misc.S
@@ -29,6 +29,7 @@
*/
ENTRY(clear_page)
+
entry a1, 16
movi a3, 0
@@ -45,6 +46,8 @@ ENTRY(clear_page)
retw
+ENDPROC(clear_page)
+
/*
* copy_page and copy_user_page are the same for non-cache-aliased configs.
*
@@ -53,6 +56,7 @@ ENTRY(clear_page)
*/
ENTRY(copy_page)
+
entry a1, 16
__loopi a2, a4, PAGE_SIZE, 32
@@ -84,6 +88,8 @@ ENTRY(copy_page)
retw
+ENDPROC(copy_page)
+
#ifdef CONFIG_MMU
/*
* If we have to deal with cache aliasing, we use temporary memory mappings
@@ -109,6 +115,7 @@ ENTRY(__tlbtemp_mapping_start)
*/
ENTRY(clear_user_page)
+
entry a1, 32
/* Mark page dirty and determine alias. */
@@ -164,6 +171,8 @@ ENTRY(clear_user_page)
retw
+ENDPROC(clear_user_page)
+
/*
* copy_page_user (void *to, void *from, unsigned long vaddr, struct page *page)
* a2 a3 a4 a5
@@ -171,7 +180,7 @@ ENTRY(clear_user_page)
ENTRY(copy_user_page)
- entry a1, 32
+ entry a1, 32
/* Mark page dirty and determine alias for destination. */
@@ -262,6 +271,8 @@ ENTRY(copy_user_page)
retw
+ENDPROC(copy_user_page)
+
#endif
#if (DCACHE_WAY_SIZE > PAGE_SIZE)
@@ -272,6 +283,7 @@ ENTRY(copy_user_page)
*/
ENTRY(__flush_invalidate_dcache_page_alias)
+
entry sp, 16
movi a7, 0 # required for exception handler
@@ -287,6 +299,7 @@ ENTRY(__flush_invalidate_dcache_page_alias)
retw
+ENDPROC(__flush_invalidate_dcache_page_alias)
#endif
ENTRY(__tlbtemp_mapping_itlb)
@@ -294,6 +307,7 @@ ENTRY(__tlbtemp_mapping_itlb)
#if (ICACHE_WAY_SIZE > PAGE_SIZE)
ENTRY(__invalidate_icache_page_alias)
+
entry sp, 16
addi a6, a3, (PAGE_KERNEL_EXEC | _PAGE_HW_WRITE)
@@ -307,11 +321,14 @@ ENTRY(__invalidate_icache_page_alias)
isync
retw
+ENDPROC(__invalidate_icache_page_alias)
+
#endif
/* End of special treatment in tlb miss exception */
ENTRY(__tlbtemp_mapping_end)
+
#endif /* CONFIG_MMU
/*
@@ -319,6 +336,7 @@ ENTRY(__tlbtemp_mapping_end)
*/
ENTRY(__invalidate_icache_page)
+
entry sp, 16
___invalidate_icache_page a2 a3
@@ -326,11 +344,14 @@ ENTRY(__invalidate_icache_page)
retw
+ENDPROC(__invalidate_icache_page)
+
/*
* void __invalidate_dcache_page(ulong start)
*/
ENTRY(__invalidate_dcache_page)
+
entry sp, 16
___invalidate_dcache_page a2 a3
@@ -338,11 +359,14 @@ ENTRY(__invalidate_dcache_page)
retw
+ENDPROC(__invalidate_dcache_page)
+
/*
* void __flush_invalidate_dcache_page(ulong start)
*/
ENTRY(__flush_invalidate_dcache_page)
+
entry sp, 16
___flush_invalidate_dcache_page a2 a3
@@ -350,11 +374,14 @@ ENTRY(__flush_invalidate_dcache_page)
dsync
retw
+ENDPROC(__flush_invalidate_dcache_page)
+
/*
* void __flush_dcache_page(ulong start)
*/
ENTRY(__flush_dcache_page)
+
entry sp, 16
___flush_dcache_page a2 a3
@@ -362,11 +389,14 @@ ENTRY(__flush_dcache_page)
dsync
retw
+ENDPROC(__flush_dcache_page)
+
/*
* void __invalidate_icache_range(ulong start, ulong size)
*/
ENTRY(__invalidate_icache_range)
+
entry sp, 16
___invalidate_icache_range a2 a3 a4
@@ -374,11 +404,14 @@ ENTRY(__invalidate_icache_range)
retw
+ENDPROC(__invalidate_icache_range)
+
/*
* void __flush_invalidate_dcache_range(ulong start, ulong size)
*/
ENTRY(__flush_invalidate_dcache_range)
+
entry sp, 16
___flush_invalidate_dcache_range a2 a3 a4
@@ -386,11 +419,14 @@ ENTRY(__flush_invalidate_dcache_range)
retw
+ENDPROC(__flush_invalidate_dcache_range)
+
/*
* void _flush_dcache_range(ulong start, ulong size)
*/
ENTRY(__flush_dcache_range)
+
entry sp, 16
___flush_dcache_range a2 a3 a4
@@ -398,22 +434,28 @@ ENTRY(__flush_dcache_range)
retw
+ENDPROC(__flush_dcache_range)
+
/*
* void _invalidate_dcache_range(ulong start, ulong size)
*/
ENTRY(__invalidate_dcache_range)
+
entry sp, 16
___invalidate_dcache_range a2 a3 a4
retw
+ENDPROC(__invalidate_dcache_range)
+
/*
* void _invalidate_icache_all(void)
*/
ENTRY(__invalidate_icache_all)
+
entry sp, 16
___invalidate_icache_all a2 a3
@@ -421,11 +463,14 @@ ENTRY(__invalidate_icache_all)
retw
+ENDPROC(__invalidate_icache_all)
+
/*
* void _flush_invalidate_dcache_all(void)
*/
ENTRY(__flush_invalidate_dcache_all)
+
entry sp, 16
___flush_invalidate_dcache_all a2 a3
@@ -433,11 +478,14 @@ ENTRY(__flush_invalidate_dcache_all)
retw
+ENDPROC(__flush_invalidate_dcache_all)
+
/*
* void _invalidate_dcache_all(void)
*/
ENTRY(__invalidate_dcache_all)
+
entry sp, 16
___invalidate_dcache_all a2 a3
@@ -445,3 +493,4 @@ ENTRY(__invalidate_dcache_all)
retw
+ENDPROC(__invalidate_dcache_all)
diff --git a/arch/xtensa/mm/mmu.c b/arch/xtensa/mm/mmu.c
index ca81654f3ec..0f77f9d3bb8 100644
--- a/arch/xtensa/mm/mmu.c
+++ b/arch/xtensa/mm/mmu.c
@@ -37,7 +37,7 @@ void __init init_mmu(void)
/* Set rasid register to a known value. */
- set_rasid_register(ASID_USER_FIRST);
+ set_rasid_register(ASID_INSERT(ASID_USER_FIRST));
/* Set PTEVADDR special register to the start of the page
* table, which is in kernel mappable space (ie. not
diff --git a/arch/xtensa/mm/tlb.c b/arch/xtensa/mm/tlb.c
index e2700b21395..5411aa67c68 100644
--- a/arch/xtensa/mm/tlb.c
+++ b/arch/xtensa/mm/tlb.c
@@ -63,7 +63,7 @@ void flush_tlb_all (void)
void flush_tlb_mm(struct mm_struct *mm)
{
if (mm == current->active_mm) {
- int flags;
+ unsigned long flags;
local_save_flags(flags);
__get_new_mmu_context(mm);
__load_mmu_context(mm);
@@ -82,7 +82,7 @@ void flush_tlb_mm(struct mm_struct *mm)
#endif
void flush_tlb_range (struct vm_area_struct *vma,
- unsigned long start, unsigned long end)
+ unsigned long start, unsigned long end)
{
struct mm_struct *mm = vma->vm_mm;
unsigned long flags;
@@ -100,7 +100,7 @@ void flush_tlb_range (struct vm_area_struct *vma,
int oldpid = get_rasid_register();
set_rasid_register (ASID_INSERT(mm->context));
start &= PAGE_MASK;
- if (vma->vm_flags & VM_EXEC)
+ if (vma->vm_flags & VM_EXEC)
while(start < end) {
invalidate_itlb_mapping(start);
invalidate_dtlb_mapping(start);
@@ -130,7 +130,7 @@ void flush_tlb_page (struct vm_area_struct *vma, unsigned long page)
local_save_flags(flags);
- oldpid = get_rasid_register();
+ oldpid = get_rasid_register();
if (vma->vm_flags & VM_EXEC)
invalidate_itlb_mapping(page);
@@ -140,4 +140,3 @@ void flush_tlb_page (struct vm_area_struct *vma, unsigned long page)
local_irq_restore(flags);
}
-
diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
index 7e74895eee0..8207a119eee 100644
--- a/arch/xtensa/platforms/iss/console.c
+++ b/arch/xtensa/platforms/iss/console.c
@@ -221,6 +221,7 @@ static __exit void rs_exit(void)
printk("ISS_SERIAL: failed to unregister serial driver (%d)\n",
error);
put_tty_driver(serial_driver);
+ tty_port_destroy(&serial_port);
}
diff --git a/arch/xtensa/platforms/iss/include/platform/serial.h b/arch/xtensa/platforms/iss/include/platform/serial.h
index e69de29bb2d..16aec542d43 100644
--- a/arch/xtensa/platforms/iss/include/platform/serial.h
+++ b/arch/xtensa/platforms/iss/include/platform/serial.h
@@ -0,0 +1,15 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 Tensilica Inc.
+ */
+
+#ifndef __ASM_XTENSA_ISS_SERIAL_H
+#define __ASM_XTENSA_ISS_SERIAL_H
+
+/* Have no meaning on ISS, but needed for 8250_early.c */
+#define BASE_BAUD 0
+
+#endif /* __ASM_XTENSA_ISS_SERIAL_H */
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h
index bd78192e2fc..b5a4edf02d7 100644
--- a/arch/xtensa/platforms/iss/include/platform/simcall.h
+++ b/arch/xtensa/platforms/iss/include/platform/simcall.h
@@ -74,13 +74,12 @@ static inline int __simc(int a, int b, int c, int d, int e, int f)
"mov %1, a3\n"
: "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
: "r"(c1), "r"(d1), "r"(e1), "r"(f1)
- : );
+ : "memory");
return ret;
}
static inline int simc_open(const char *file, int flags, int mode)
{
- wmb();
return __simc(SYS_open, (int) file, flags, mode, 0, 0);
}
@@ -91,19 +90,16 @@ static inline int simc_close(int fd)
static inline int simc_ioctl(int fd, int request, void *arg)
{
- wmb();
return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0);
}
static inline int simc_read(int fd, void *buf, size_t count)
{
- rmb();
return __simc(SYS_read, fd, (int) buf, count, 0, 0);
}
static inline int simc_write(int fd, const void *buf, size_t count)
{
- wmb();
return __simc(SYS_write, fd, (int) buf, count, 0, 0);
}
@@ -111,7 +107,6 @@ static inline int simc_poll(int fd)
{
struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
- wmb();
return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv,
0, 0);
}
diff --git a/arch/xtensa/platforms/xtfpga/Makefile b/arch/xtensa/platforms/xtfpga/Makefile
new file mode 100644
index 00000000000..b9ae206340c
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/Makefile
@@ -0,0 +1,9 @@
+# Makefile for the Tensilica xtavnet Emulation Board
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definitions are in the main makefile...
+
+obj-y = setup.o lcd.o
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/hardware.h b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
new file mode 100644
index 00000000000..4416773cbde
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
@@ -0,0 +1,69 @@
+/*
+ * arch/xtensa/platform/xtavnet/include/platform/hardware.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Tensilica Inc.
+ */
+
+/*
+ * This file contains the hardware configuration of the XTAVNET boards.
+ */
+
+#ifndef __XTENSA_XTAVNET_HARDWARE_H
+#define __XTENSA_XTAVNET_HARDWARE_H
+
+/* By default NO_IRQ is defined to 0 in Linux, but we use the
+ interrupt 0 for UART... */
+#define NO_IRQ -1
+
+/* Memory configuration. */
+
+#define PLATFORM_DEFAULT_MEM_START 0x00000000
+#define PLATFORM_DEFAULT_MEM_SIZE 0x04000000
+
+/* Interrupt configuration. */
+
+#define PLATFORM_NR_IRQS 10
+
+/* Default assignment of LX60 devices to external interrupts. */
+
+#ifdef CONFIG_ARCH_HAS_SMP
+#define DUART16552_INTNUM XCHAL_EXTINT3_NUM
+#define OETH_IRQ XCHAL_EXTINT4_NUM
+#else
+#define DUART16552_INTNUM XCHAL_EXTINT0_NUM
+#define OETH_IRQ XCHAL_EXTINT1_NUM
+#endif
+
+/*
+ * Device addresses and parameters.
+ */
+
+/* UART */
+#define DUART16552_PADDR (XCHAL_KIO_PADDR + 0x0D050020)
+/* LCD instruction and data addresses. */
+#define LCD_INSTR_ADDR ((char *)IOADDR(0x0D040000))
+#define LCD_DATA_ADDR ((char *)IOADDR(0x0D040004))
+
+/* Misc. */
+#define XTFPGA_FPGAREGS_VADDR IOADDR(0x0D020000)
+/* Clock frequency in Hz (read-only): */
+#define XTFPGA_CLKFRQ_VADDR (XTFPGA_FPGAREGS_VADDR + 0x04)
+/* Setting of 8 DIP switches: */
+#define DIP_SWITCHES_VADDR (XTFPGA_FPGAREGS_VADDR + 0x0C)
+/* Software reset (write 0xdead): */
+#define XTFPGA_SWRST_VADDR (XTFPGA_FPGAREGS_VADDR + 0x10)
+
+/* OpenCores Ethernet controller: */
+ /* regs + RX/TX descriptors */
+#define OETH_REGS_PADDR (XCHAL_KIO_PADDR + 0x0D030000)
+#define OETH_REGS_SIZE 0x1000
+#define OETH_SRAMBUFF_PADDR (XCHAL_KIO_PADDR + 0x0D800000)
+
+ /* 5*rx buffs + 5*tx buffs */
+#define OETH_SRAMBUFF_SIZE (5 * 0x600 + 5 * 0x600)
+
+#endif /* __XTENSA_XTAVNET_HARDWARE_H */
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/lcd.h b/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
new file mode 100644
index 00000000000..0e435645af5
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
@@ -0,0 +1,20 @@
+/*
+ * arch/xtensa/platform/xtavnet/include/platform/lcd.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001, 2006 Tensilica Inc.
+ */
+
+#ifndef __XTENSA_XTAVNET_LCD_H
+#define __XTENSA_XTAVNET_LCD_H
+
+/* Display string STR at position POS on the LCD. */
+void lcd_disp_at_pos(char *str, unsigned char pos);
+
+/* Shift the contents of the LCD display left or right. */
+void lcd_shiftleft(void);
+void lcd_shiftright(void);
+#endif
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/serial.h b/arch/xtensa/platforms/xtfpga/include/platform/serial.h
new file mode 100644
index 00000000000..14d8f7beebf
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/include/platform/serial.h
@@ -0,0 +1,18 @@
+/*
+ * arch/xtensa/platform/xtavnet/include/platform/serial.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001, 2006 Tensilica Inc.
+ */
+
+#ifndef __ASM_XTENSA_XTAVNET_SERIAL_H
+#define __ASM_XTENSA_XTAVNET_SERIAL_H
+
+#include <platform/hardware.h>
+
+#define BASE_BAUD (*(long *)XTFPGA_CLKFRQ_VADDR / 16)
+
+#endif /* __ASM_XTENSA_XTAVNET_SERIAL_H */
diff --git a/arch/xtensa/platforms/xtfpga/lcd.c b/arch/xtensa/platforms/xtfpga/lcd.c
new file mode 100644
index 00000000000..2872301598d
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/lcd.c
@@ -0,0 +1,76 @@
+/*
+ * Driver for the LCD display on the Tensilica LX60 Board.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001, 2006 Tensilica Inc.
+ */
+
+/*
+ *
+ * FIXME: this code is from the examples from the LX60 user guide.
+ *
+ * The lcd_pause function does busy waiting, which is probably not
+ * great. Maybe the code could be changed to use kernel timers, or
+ * change the hardware to not need to wait.
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <platform/hardware.h>
+#include <platform/lcd.h>
+#include <linux/delay.h>
+
+#define LCD_PAUSE_ITERATIONS 4000
+#define LCD_CLEAR 0x1
+#define LCD_DISPLAY_ON 0xc
+
+/* 8bit and 2 lines display */
+#define LCD_DISPLAY_MODE8BIT 0x38
+#define LCD_DISPLAY_POS 0x80
+#define LCD_SHIFT_LEFT 0x18
+#define LCD_SHIFT_RIGHT 0x1c
+
+static int __init lcd_init(void)
+{
+ *LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
+ mdelay(5);
+ *LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
+ udelay(200);
+ *LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
+ udelay(50);
+ *LCD_INSTR_ADDR = LCD_DISPLAY_ON;
+ udelay(50);
+ *LCD_INSTR_ADDR = LCD_CLEAR;
+ mdelay(10);
+ lcd_disp_at_pos("XTENSA LINUX", 0);
+ return 0;
+}
+
+void lcd_disp_at_pos(char *str, unsigned char pos)
+{
+ *LCD_INSTR_ADDR = LCD_DISPLAY_POS | pos;
+ udelay(100);
+ while (*str != 0) {
+ *LCD_DATA_ADDR = *str;
+ udelay(200);
+ str++;
+ }
+}
+
+void lcd_shiftleft(void)
+{
+ *LCD_INSTR_ADDR = LCD_SHIFT_LEFT;
+ udelay(50);
+}
+
+void lcd_shiftright(void)
+{
+ *LCD_INSTR_ADDR = LCD_SHIFT_RIGHT;
+ udelay(50);
+}
+
+arch_initcall(lcd_init);
diff --git a/arch/xtensa/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c
new file mode 100644
index 00000000000..4b9951a4569
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/setup.c
@@ -0,0 +1,301 @@
+/*
+ *
+ * arch/xtensa/platform/xtavnet/setup.c
+ *
+ * ...
+ *
+ * Authors: Chris Zankel <chris@zankel.net>
+ * Joe Taylor <joe@tensilica.com>
+ *
+ * Copyright 2001 - 2006 Tensilica Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+
+#include <asm/timex.h>
+#include <asm/processor.h>
+#include <asm/platform.h>
+#include <asm/bootparam.h>
+#include <platform/lcd.h>
+#include <platform/hardware.h>
+
+void platform_halt(void)
+{
+ lcd_disp_at_pos(" HALT ", 0);
+ local_irq_disable();
+ while (1)
+ cpu_relax();
+}
+
+void platform_power_off(void)
+{
+ lcd_disp_at_pos("POWEROFF", 0);
+ local_irq_disable();
+ while (1)
+ cpu_relax();
+}
+
+void platform_restart(void)
+{
+ /* Flush and reset the mmu, simulate a processor reset, and
+ * jump to the reset vector. */
+
+
+ __asm__ __volatile__ ("movi a2, 15\n\t"
+ "wsr a2, icountlevel\n\t"
+ "movi a2, 0\n\t"
+ "wsr a2, icount\n\t"
+ "wsr a2, ibreakenable\n\t"
+ "wsr a2, lcount\n\t"
+ "movi a2, 0x1f\n\t"
+ "wsr a2, ps\n\t"
+ "isync\n\t"
+ "jx %0\n\t"
+ :
+ : "a" (XCHAL_RESET_VECTOR_VADDR)
+ : "a2"
+ );
+
+ /* control never gets here */
+}
+
+void __init platform_setup(char **cmdline)
+{
+}
+
+#ifdef CONFIG_OF
+
+static void __init update_clock_frequency(struct device_node *node)
+{
+ struct property *newfreq;
+ u32 freq;
+
+ if (!of_property_read_u32(node, "clock-frequency", &freq) && freq != 0)
+ return;
+
+ newfreq = kzalloc(sizeof(*newfreq) + sizeof(u32), GFP_KERNEL);
+ if (!newfreq)
+ return;
+ newfreq->value = newfreq + 1;
+ newfreq->length = sizeof(freq);
+ newfreq->name = kstrdup("clock-frequency", GFP_KERNEL);
+ if (!newfreq->name) {
+ kfree(newfreq);
+ return;
+ }
+
+ *(u32 *)newfreq->value = cpu_to_be32(*(u32 *)XTFPGA_CLKFRQ_VADDR);
+ prom_update_property(node, newfreq);
+}
+
+#define MAC_LEN 6
+static void __init update_local_mac(struct device_node *node)
+{
+ struct property *newmac;
+ const u8* macaddr;
+ int prop_len;
+
+ macaddr = of_get_property(node, "local-mac-address", &prop_len);
+ if (macaddr == NULL || prop_len != MAC_LEN)
+ return;
+
+ newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
+ if (newmac == NULL)
+ return;
+
+ newmac->value = newmac + 1;
+ newmac->length = MAC_LEN;
+ newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
+ if (newmac->name == NULL) {
+ kfree(newmac);
+ return;
+ }
+
+ memcpy(newmac->value, macaddr, MAC_LEN);
+ ((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f;
+ prom_update_property(node, newmac);
+}
+
+static int __init machine_setup(void)
+{
+ struct device_node *serial;
+ struct device_node *eth = NULL;
+
+ for_each_compatible_node(serial, NULL, "ns16550a")
+ update_clock_frequency(serial);
+
+ if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
+ update_local_mac(eth);
+ return 0;
+}
+arch_initcall(machine_setup);
+
+#endif
+
+/* early initialization */
+
+void __init platform_init(bp_tag_t *first)
+{
+}
+
+/* Heartbeat. */
+
+void platform_heartbeat(void)
+{
+}
+
+#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
+
+void platform_calibrate_ccount(void)
+{
+ long clk_freq = 0;
+#ifdef CONFIG_OF
+ struct device_node *cpu =
+ of_find_compatible_node(NULL, NULL, "xtensa,cpu");
+ if (cpu) {
+ u32 freq;
+ update_clock_frequency(cpu);
+ if (!of_property_read_u32(cpu, "clock-frequency", &freq))
+ clk_freq = freq;
+ }
+#endif
+ if (!clk_freq)
+ clk_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
+
+ ccount_per_jiffy = clk_freq / HZ;
+ nsec_per_ccount = 1000000000UL / clk_freq;
+}
+
+#endif
+
+#ifndef CONFIG_OF
+
+#include <linux/serial_8250.h>
+#include <linux/if.h>
+#include <net/ethoc.h>
+
+/*----------------------------------------------------------------------------
+ * Ethernet -- OpenCores Ethernet MAC (ethoc driver)
+ */
+
+static struct resource ethoc_res[] __initdata = {
+ [0] = { /* register space */
+ .start = OETH_REGS_PADDR,
+ .end = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = { /* buffer space */
+ .start = OETH_SRAMBUFF_PADDR,
+ .end = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [2] = { /* IRQ number */
+ .start = OETH_IRQ,
+ .end = OETH_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct ethoc_platform_data ethoc_pdata __initdata = {
+ /*
+ * The MAC address for these boards is 00:50:c2:13:6f:xx.
+ * The last byte (here as zero) is read from the DIP switches on the
+ * board.
+ */
+ .hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
+ .phy_id = -1,
+};
+
+static struct platform_device ethoc_device __initdata = {
+ .name = "ethoc",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(ethoc_res),
+ .resource = ethoc_res,
+ .dev = {
+ .platform_data = &ethoc_pdata,
+ },
+};
+
+/*----------------------------------------------------------------------------
+ * UART
+ */
+
+static struct resource serial_resource __initdata = {
+ .start = DUART16552_PADDR,
+ .end = DUART16552_PADDR + 0x1f,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct plat_serial8250_port serial_platform_data[] __initdata = {
+ [0] = {
+ .mapbase = DUART16552_PADDR,
+ .irq = DUART16552_INTNUM,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+ UPF_IOREMAP,
+ .iotype = UPIO_MEM32,
+ .regshift = 2,
+ .uartclk = 0, /* set in xtavnet_init() */
+ },
+ { },
+};
+
+static struct platform_device xtavnet_uart __initdata = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev = {
+ .platform_data = serial_platform_data,
+ },
+ .num_resources = 1,
+ .resource = &serial_resource,
+};
+
+/* platform devices */
+static struct platform_device *platform_devices[] __initdata = {
+ &ethoc_device,
+ &xtavnet_uart,
+};
+
+
+static int __init xtavnet_init(void)
+{
+ /* Ethernet MAC address. */
+ ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR;
+
+ /* Clock rate varies among FPGA bitstreams; board specific FPGA register
+ * reports the actual clock rate.
+ */
+ serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR;
+
+
+ /* register platform devices */
+ platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
+
+ /* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
+ * knows whether they set it correctly on the DIP switches.
+ */
+ pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
+
+ return 0;
+}
+
+/*
+ * Register to be done during do_initcalls().
+ */
+arch_initcall(xtavnet_init);
+
+#endif /* CONFIG_OF */
diff --git a/arch/xtensa/variants/s6000/gpio.c b/arch/xtensa/variants/s6000/gpio.c
index b89541ba39a..da9e85c13b0 100644
--- a/arch/xtensa/variants/s6000/gpio.c
+++ b/arch/xtensa/variants/s6000/gpio.c
@@ -164,7 +164,7 @@ static void demux_irqs(unsigned int irq, struct irq_desc *desc)
int cirq;
chip->irq_mask(&desc->irq_data);
- chip->irq_ack(&desc->irq_data));
+ chip->irq_ack(&desc->irq_data);
pending = readb(S6_REG_GPIO + S6_GPIO_BANK(0) + S6_GPIO_MIS) & *mask;
cirq = IRQ_BASE - 1;
while (pending) {
@@ -173,7 +173,7 @@ static void demux_irqs(unsigned int irq, struct irq_desc *desc)
pending >>= n;
generic_handle_irq(cirq);
}
- chip->irq_unmask(&desc->irq_data));
+ chip->irq_unmask(&desc->irq_data);
}
extern const signed char *platform_irq_mappings[XTENSA_NR_IRQS];