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-rw-r--r--arch/arm/Kconfig2
-rw-r--r--arch/arm/Makefile1
-rw-r--r--arch/arm/boot/dts/st-pincfg.h71
-rw-r--r--arch/arm/boot/dts/stih415-clock.dtsi38
-rw-r--r--arch/arm/boot/dts/stih415-pinctrl.dtsi268
-rw-r--r--arch/arm/boot/dts/stih415.dtsi87
-rw-r--r--arch/arm/boot/dts/stih41x.dtsi38
-rw-r--r--arch/arm/mach-sti/Kconfig36
-rw-r--r--arch/arm/mach-sti/Makefile2
-rw-r--r--arch/arm/mach-sti/board-dt.c47
-rw-r--r--arch/arm/mach-sti/headsmp.S44
-rw-r--r--arch/arm/mach-sti/platsmp.c117
-rw-r--r--arch/arm/mach-sti/smp.h17
13 files changed, 768 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 49d993cee51..75138645080 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -989,6 +989,8 @@ source "arch/arm/mach-socfpga/Kconfig"
source "arch/arm/mach-spear/Kconfig"
+source "arch/arm/mach-sti/Kconfig"
+
source "arch/arm/mach-s3c24xx/Kconfig"
if ARCH_S3C64XX
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 1ba358ba16b..ef8b1943dcc 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -191,6 +191,7 @@ machine-$(CONFIG_ARCH_W90X900) += w90x900
machine-$(CONFIG_FOOTBRIDGE) += footbridge
machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
machine-$(CONFIG_PLAT_SPEAR) += spear
+machine-$(CONFIG_ARCH_STI) += sti
machine-$(CONFIG_ARCH_VIRT) += virt
machine-$(CONFIG_ARCH_ZYNQ) += zynq
machine-$(CONFIG_ARCH_SUNXI) += sunxi
diff --git a/arch/arm/boot/dts/st-pincfg.h b/arch/arm/boot/dts/st-pincfg.h
new file mode 100644
index 00000000000..8c45d85ac13
--- /dev/null
+++ b/arch/arm/boot/dts/st-pincfg.h
@@ -0,0 +1,71 @@
+#ifndef _ST_PINCFG_H_
+#define _ST_PINCFG_H_
+
+/* Alternate functions */
+#define ALT1 1
+#define ALT2 2
+#define ALT3 3
+#define ALT4 4
+#define ALT5 5
+#define ALT6 6
+#define ALT7 7
+
+/* Output enable */
+#define OE (1 << 27)
+/* Pull Up */
+#define PU (1 << 26)
+/* Open Drain */
+#define OD (1 << 26)
+#define RT (1 << 23)
+#define INVERTCLK (1 << 22)
+#define CLKNOTDATA (1 << 21)
+#define DOUBLE_EDGE (1 << 20)
+#define CLK_A (0 << 18)
+#define CLK_B (1 << 18)
+#define CLK_C (2 << 18)
+#define CLK_D (3 << 18)
+
+/* User-frendly defines for Pin Direction */
+ /* oe = 0, pu = 0, od = 0 */
+#define IN (0)
+ /* oe = 0, pu = 1, od = 0 */
+#define IN_PU (PU)
+ /* oe = 1, pu = 0, od = 0 */
+#define OUT (OE)
+ /* oe = 1, pu = 0, od = 1 */
+#define BIDIR (OE | OD)
+ /* oe = 1, pu = 1, od = 1 */
+#define BIDIR_PU (OE | PU | OD)
+
+/* RETIME_TYPE */
+/*
+ * B Mode
+ * Bypass retime with optional delay parameter
+ */
+#define BYPASS (0)
+/*
+ * R0, R1, R0D, R1D modes
+ * single-edge data non inverted clock, retime data with clk
+ */
+#define SE_NICLK_IO (RT)
+/*
+ * RIV0, RIV1, RIV0D, RIV1D modes
+ * single-edge data inverted clock, retime data with clk
+ */
+#define SE_ICLK_IO (RT | INVERTCLK)
+/*
+ * R0E, R1E, R0ED, R1ED modes
+ * double-edge data, retime data with clk
+ */
+#define DE_IO (RT | DOUBLE_EDGE)
+/*
+ * CIV0, CIV1 modes with inverted clock
+ * Retiming the clk pins will park clock & reduce the noise within the core.
+ */
+#define ICLK (RT | CLKNOTDATA | INVERTCLK)
+/*
+ * CLK0, CLK1 modes with non-inverted clock
+ * Retiming the clk pins will park clock & reduce the noise within the core.
+ */
+#define NICLK (RT | CLKNOTDATA)
+#endif /* _ST_PINCFG_H_ */
diff --git a/arch/arm/boot/dts/stih415-clock.dtsi b/arch/arm/boot/dts/stih415-clock.dtsi
new file mode 100644
index 00000000000..174c799df74
--- /dev/null
+++ b/arch/arm/boot/dts/stih415-clock.dtsi
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/ {
+ clocks {
+ /*
+ * Fixed 30MHz oscillator input to SoC
+ */
+ CLK_SYSIN: CLK_SYSIN {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <30000000>;
+ };
+
+ /*
+ * ARM Peripheral clock for timers
+ */
+ arm_periph_clk: arm_periph_clk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <500000000>;
+ };
+
+ /*
+ * Bootloader initialized system infrastructure clock for
+ * serial devices.
+ */
+ CLKS_ICN_REG_0: CLKS_ICN_REG_0 {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <100000000>;
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/stih415-pinctrl.dtsi b/arch/arm/boot/dts/stih415-pinctrl.dtsi
new file mode 100644
index 00000000000..1d322b24d1e
--- /dev/null
+++ b/arch/arm/boot/dts/stih415-pinctrl.dtsi
@@ -0,0 +1,268 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * publishhed by the Free Software Foundation.
+ */
+#include "st-pincfg.h"
+/ {
+
+ aliases {
+ gpio0 = &PIO0;
+ gpio1 = &PIO1;
+ gpio2 = &PIO2;
+ gpio3 = &PIO3;
+ gpio4 = &PIO4;
+ gpio5 = &PIO5;
+ gpio6 = &PIO6;
+ gpio7 = &PIO7;
+ gpio8 = &PIO8;
+ gpio9 = &PIO9;
+ gpio10 = &PIO10;
+ gpio11 = &PIO11;
+ gpio12 = &PIO12;
+ gpio13 = &PIO13;
+ gpio14 = &PIO14;
+ gpio15 = &PIO15;
+ gpio16 = &PIO16;
+ gpio17 = &PIO17;
+ gpio18 = &PIO18;
+ gpio19 = &PIO100;
+ gpio20 = &PIO101;
+ gpio21 = &PIO102;
+ gpio22 = &PIO103;
+ gpio23 = &PIO104;
+ gpio24 = &PIO105;
+ gpio25 = &PIO106;
+ gpio26 = &PIO107;
+ };
+
+ soc {
+ pin-controller-sbc {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "st,stih415-sbc-pinctrl";
+ st,syscfg = <&syscfg_sbc>;
+ ranges = <0 0xfe610000 0x5000>;
+
+ PIO0: gpio@fe610000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0 0x100>;
+ st,bank-name = "PIO0";
+ };
+ PIO1: gpio@fe611000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x1000 0x100>;
+ st,bank-name = "PIO1";
+ };
+ PIO2: gpio@fe612000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x2000 0x100>;
+ st,bank-name = "PIO2";
+ };
+ PIO3: gpio@fe613000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x3000 0x100>;
+ st,bank-name = "PIO3";
+ };
+ PIO4: gpio@fe614000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x4000 0x100>;
+ st,bank-name = "PIO4";
+ };
+
+ sbc_serial1 {
+ pinctrl_sbc_serial1:sbc_serial1 {
+ st,pins {
+ tx = <&PIO2 6 ALT3 OUT>;
+ rx = <&PIO2 7 ALT3 IN>;
+ };
+ };
+ };
+ };
+
+ pin-controller-front {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "st,stih415-front-pinctrl";
+ st,syscfg = <&syscfg_front>;
+ ranges = <0 0xfee00000 0x8000>;
+
+ PIO5: gpio@fee00000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0 0x100>;
+ st,bank-name = "PIO5";
+ };
+ PIO6: gpio@fee01000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x1000 0x100>;
+ st,bank-name = "PIO6";
+ };
+ PIO7: gpio@fee02000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x2000 0x100>;
+ st,bank-name = "PIO7";
+ };
+ PIO8: gpio@fee03000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x3000 0x100>;
+ st,bank-name = "PIO8";
+ };
+ PIO9: gpio@fee04000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x4000 0x100>;
+ st,bank-name = "PIO9";
+ };
+ PIO10: gpio@fee05000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x5000 0x100>;
+ st,bank-name = "PIO10";
+ };
+ PIO11: gpio@fee06000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x6000 0x100>;
+ st,bank-name = "PIO11";
+ };
+ PIO12: gpio@fee07000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x7000 0x100>;
+ st,bank-name = "PIO12";
+ };
+ };
+
+ pin-controller-rear {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "st,stih415-rear-pinctrl";
+ st,syscfg = <&syscfg_rear>;
+ ranges = <0 0xfe820000 0x8000>;
+
+ PIO13: gpio@fe820000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0 0x100>;
+ st,bank-name = "PIO13";
+ };
+ PIO14: gpio@fe821000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x1000 0x100>;
+ st,bank-name = "PIO14";
+ };
+ PIO15: gpio@fe822000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x2000 0x100>;
+ st,bank-name = "PIO15";
+ };
+ PIO16: gpio@fe823000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x3000 0x100>;
+ st,bank-name = "PIO16";
+ };
+ PIO17: gpio@fe824000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x4000 0x100>;
+ st,bank-name = "PIO17";
+ };
+ PIO18: gpio@fe825000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x5000 0x100>;
+ st,bank-name = "PIO18";
+ };
+
+ serial2 {
+ pinctrl_serial2: serial2-0 {
+ st,pins {
+ tx = <&PIO17 4 ALT2 OUT>;
+ rx = <&PIO17 5 ALT2 IN>;
+ };
+ };
+ };
+ };
+
+ pin-controller-left {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "st,stih415-left-pinctrl";
+ st,syscfg = <&syscfg_left>;
+ ranges = <0 0xfd6b0000 0x3000>;
+
+ PIO100: gpio@fd6b0000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0 0x100>;
+ st,bank-name = "PIO100";
+ };
+ PIO101: gpio@fd6b1000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x1000 0x100>;
+ st,bank-name = "PIO101";
+ };
+ PIO102: gpio@fd6b2000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x2000 0x100>;
+ st,bank-name = "PIO102";
+ };
+ };
+
+ pin-controller-right {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "st,stih415-right-pinctrl";
+ st,syscfg = <&syscfg_right>;
+ ranges = <0 0xfd330000 0x5000>;
+
+ PIO103: gpio@fd330000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0 0x100>;
+ st,bank-name = "PIO103";
+ };
+ PIO104: gpio@fd331000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x1000 0x100>;
+ st,bank-name = "PIO104";
+ };
+ PIO105: gpio@fd332000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x2000 0x100>;
+ st,bank-name = "PIO105";
+ };
+ PIO106: gpio@fd333000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x3000 0x100>;
+ st,bank-name = "PIO106";
+ };
+ PIO107: gpio@fd334000 {
+ gpio-controller;
+ #gpio-cells = <1>;
+ reg = <0x4000 0x100>;
+ st,bank-name = "PIO107";
+ };
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/stih415.dtsi b/arch/arm/boot/dts/stih415.dtsi
new file mode 100644
index 00000000000..74ab8ded4b4
--- /dev/null
+++ b/arch/arm/boot/dts/stih415.dtsi
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * publishhed by the Free Software Foundation.
+ */
+#include "stih41x.dtsi"
+#include "stih415-clock.dtsi"
+#include "stih415-pinctrl.dtsi"
+/ {
+
+ L2: cache-controller {
+ compatible = "arm,pl310-cache";
+ reg = <0xfffe2000 0x1000>;
+ arm,data-latency = <3 2 2>;
+ arm,tag-latency = <1 1 1>;
+ cache-unified;
+ cache-level = <2>;
+ };
+
+ soc {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&intc>;
+ ranges;
+ compatible = "simple-bus";
+
+ syscfg_sbc: sbc-syscfg@fe600000{
+ compatible = "st,stih415-sbc-syscfg", "syscon";
+ reg = <0xfe600000 0xb4>;
+ };
+
+ syscfg_front: front-syscfg@fee10000{
+ compatible = "st,stih415-front-syscfg", "syscon";
+ reg = <0xfee10000 0x194>;
+ };
+
+ syscfg_rear: rear-syscfg@fe830000{
+ compatible = "st,stih415-rear-syscfg", "syscon";
+ reg = <0xfe830000 0x190>;
+ };
+
+ /* MPE syscfgs */
+ syscfg_left: left-syscfg@fd690000{
+ compatible = "st,stih415-left-syscfg", "syscon";
+ reg = <0xfd690000 0x78>;
+ };
+
+ syscfg_right: right-syscfg@fd320000{
+ compatible = "st,stih415-right-syscfg", "syscon";
+ reg = <0xfd320000 0x180>;
+ };
+
+ syscfg_system: system-syscfg@fdde0000 {
+ compatible = "st,stih415-system-syscfg", "syscon";
+ reg = <0xfdde0000 0x15c>;
+ };
+
+ syscfg_lpm: lpm-syscfg@fe4b5100{
+ compatible = "st,stih415-lpm-syscfg", "syscon";
+ reg = <0xfe4b5100 0x08>;
+ };
+
+ serial2: serial@fed32000 {
+ compatible = "st,asc";
+ status = "disabled";
+ reg = <0xfed32000 0x2c>;
+ interrupts = <0 197 0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_serial2>;
+ clocks = <&CLKS_ICN_REG_0>;
+ };
+
+ /* SBC comms block ASCs in SASG1 */
+ sbc_serial1: serial@fe531000 {
+ compatible = "st,asc";
+ status = "disabled";
+ reg = <0xfe531000 0x2c>;
+ interrupts = <0 210 0>;
+ clocks = <&CLK_SYSIN>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_sbc_serial1>;
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/stih41x.dtsi b/arch/arm/boot/dts/stih41x.dtsi
new file mode 100644
index 00000000000..7321403cab8
--- /dev/null
+++ b/arch/arm/boot/dts/stih41x.dtsi
@@ -0,0 +1,38 @@
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cpu@0 {
+ compatible = "arm,cortex-a9";
+ reg = <0>;
+ };
+ cpu@1 {
+ compatible = "arm,cortex-a9";
+ reg = <1>;
+ };
+ };
+
+ intc: interrupt-controller@fffe1000 {
+ compatible = "arm,cortex-a9-gic";
+ #interrupt-cells = <3>;
+ interrupt-controller;
+ reg = <0xfffe1000 0x1000>,
+ <0xfffe0100 0x100>;
+ };
+
+ scu@fffe0000 {
+ compatible = "arm,cortex-a9-scu";
+ reg = <0xfffe0000 0x1000>;
+ };
+
+ timer@fffe0200 {
+ interrupt-parent = <&intc>;
+ compatible = "arm,cortex-a9-global-timer";
+ reg = <0xfffe0200 0x100>;
+ interrupts = <1 11 0x04>;
+ clocks = <&arm_periph_clk>;
+ };
+};
diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
new file mode 100644
index 00000000000..23405b584ad
--- /dev/null
+++ b/arch/arm/mach-sti/Kconfig
@@ -0,0 +1,36 @@
+menuconfig ARCH_STI
+ bool "STMicroelectronics Consumer Electronics SOCs with Device Trees" if ARCH_MULTI_V7
+ select GENERIC_CLOCKEVENTS
+ select CLKDEV_LOOKUP
+ select ARM_GIC
+ select ARM_GLOBAL_TIMER
+ select PINCTRL
+ select PINCTRL_ST
+ select MFD_SYSCON
+ select MIGHT_HAVE_CACHE_L2X0
+ select HAVE_SMP
+ select HAVE_ARM_SCU if SMP
+ select ARCH_REQUIRE_GPIOLIB
+ select ARM_ERRATA_720789
+ select ARM_ERRATA_754322
+ select PL310_ERRATA_753970 if CACHE_PL310
+ select PL310_ERRATA_769419 if CACHE_PL310
+ help
+ Include support for STiH41x SOCs like STiH415/416 using the device tree
+ for discovery
+ More information at Documentation/arm/STiH41x and
+ at Documentation/devicetree
+
+
+if ARCH_STI
+
+config SOC_STIH415
+ bool "STiH415 STMicroelectronics Consumer Electronics family"
+ default y
+ help
+ This enables support for STMicroelectronics Digital Consumer
+ Electronics family StiH415 parts, primarily targetted at set-top-box
+ and other digital audio/video applications using Flattned Device
+ Trees.
+
+endif
diff --git a/arch/arm/mach-sti/Makefile b/arch/arm/mach-sti/Makefile
new file mode 100644
index 00000000000..acb33091633
--- /dev/null
+++ b/arch/arm/mach-sti/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SMP) += platsmp.o headsmp.o
+obj-$(CONFIG_ARCH_STI) += board-dt.o
diff --git a/arch/arm/mach-sti/board-dt.c b/arch/arm/mach-sti/board-dt.c
new file mode 100644
index 00000000000..3faf64221d4
--- /dev/null
+++ b/arch/arm/mach-sti/board-dt.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author(s): Srinivas Kandagatla <srinivas.kandagatla@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/irq.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+
+#include "smp.h"
+
+void __init stih41x_l2x0_init(void)
+{
+ u32 way_size = 0x4;
+ u32 aux_ctrl;
+ /* may be this can be encoded in macros like BIT*() */
+ aux_ctrl = (0x1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) |
+ (0x1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
+ (0x1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) |
+ (way_size << L2X0_AUX_CTRL_WAY_SIZE_SHIFT);
+
+ l2x0_of_init(aux_ctrl, L2X0_AUX_CTRL_MASK);
+}
+
+static void __init stih41x_timer_init(void)
+{
+ of_clk_init(NULL);
+ clocksource_of_init();
+ stih41x_l2x0_init();
+}
+
+static const char *stih41x_dt_match[] __initdata = {
+ "st,stih415",
+ NULL
+};
+
+DT_MACHINE_START(STM, "STiH415 SoC with Flattened Device Tree")
+ .init_time = stih41x_timer_init,
+ .smp = smp_ops(sti_smp_ops),
+ .dt_compat = stih41x_dt_match,
+MACHINE_END
diff --git a/arch/arm/mach-sti/headsmp.S b/arch/arm/mach-sti/headsmp.S
new file mode 100644
index 00000000000..78ebc7559f5
--- /dev/null
+++ b/arch/arm/mach-sti/headsmp.S
@@ -0,0 +1,44 @@
+/*
+ * arch/arm/mach-sti/headsmp.S
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * http://www.st.com
+ *
+ * Cloned from linux/arch/arm/mach-vexpress/headsmp.S
+ *
+ * Copyright (c) 2003 ARM Limited
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+ __INIT
+
+/*
+ * ST specific entry point for secondary CPUs. This provides
+ * a "holding pen" into which all secondary cores are held until we're
+ * ready for them to initialise.
+ */
+ENTRY(sti_secondary_startup)
+ mrc p15, 0, r0, c0, c0, 5
+ and r0, r0, #15
+ adr r4, 1f
+ ldmia r4, {r5, r6}
+ sub r4, r4, r5
+ add r6, r6, r4
+pen: ldr r7, [r6]
+ cmp r7, r0
+ bne pen
+
+ /*
+ * we've been released from the holding pen: secondary_stack
+ * should now contain the SVC stack for this core
+ */
+ b secondary_startup
+
+1: .long .
+ .long pen_release
diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c
new file mode 100644
index 00000000000..977a863468f
--- /dev/null
+++ b/arch/arm/mach-sti/platsmp.c
@@ -0,0 +1,117 @@
+/*
+ * arch/arm/mach-sti/platsmp.c
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * http://www.st.com
+ *
+ * Cloned from linux/arch/arm/mach-vexpress/platsmp.c
+ *
+ * Copyright (C) 2002 ARM Ltd.
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "smp.h"
+
+static void __cpuinit write_pen_release(int val)
+{
+ pen_release = val;
+ smp_wmb();
+ __cpuc_flush_dcache_area((void *)&pen_release, sizeof(pen_release));
+ outer_clean_range(__pa(&pen_release), __pa(&pen_release + 1));
+}
+
+static DEFINE_SPINLOCK(boot_lock);
+
+void __cpuinit sti_secondary_init(unsigned int cpu)
+{
+ trace_hardirqs_off();
+
+ /*
+ * let the primary processor know we're out of the
+ * pen, then head off into the C entry point
+ */
+ write_pen_release(-1);
+
+ /*
+ * Synchronise with the boot thread.
+ */
+ spin_lock(&boot_lock);
+ spin_unlock(&boot_lock);
+}
+
+int __cpuinit sti_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ unsigned long timeout;
+
+ /*
+ * set synchronisation state between this boot processor
+ * and the secondary one
+ */
+ spin_lock(&boot_lock);
+
+ /*
+ * The secondary processor is waiting to be released from
+ * the holding pen - release it, then wait for it to flag
+ * that it has been released by resetting pen_release.
+ *
+ * Note that "pen_release" is the hardware CPU ID, whereas
+ * "cpu" is Linux's internal ID.
+ */
+ write_pen_release(cpu_logical_map(cpu));
+
+ /*
+ * Send the secondary CPU a soft interrupt, thereby causing
+ * it to jump to the secondary entrypoint.
+ */
+ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+
+ timeout = jiffies + (1 * HZ);
+ while (time_before(jiffies, timeout)) {
+ smp_rmb();
+ if (pen_release == -1)
+ break;
+
+ udelay(10);
+ }
+
+ /*
+ * now the secondary core is starting up let it run its
+ * calibrations, then wait for it to finish
+ */
+ spin_unlock(&boot_lock);
+
+ return pen_release != -1 ? -ENOSYS : 0;
+}
+
+void __init sti_smp_prepare_cpus(unsigned int max_cpus)
+{
+ void __iomem *scu_base = NULL;
+ struct device_node *np = of_find_compatible_node(
+ NULL, NULL, "arm,cortex-a9-scu");
+ if (np) {
+ scu_base = of_iomap(np, 0);
+ scu_enable(scu_base);
+ of_node_put(np);
+ }
+}
+
+struct smp_operations __initdata sti_smp_ops = {
+ .smp_prepare_cpus = sti_smp_prepare_cpus,
+ .smp_secondary_init = sti_secondary_init,
+ .smp_boot_secondary = sti_boot_secondary,
+};
diff --git a/arch/arm/mach-sti/smp.h b/arch/arm/mach-sti/smp.h
new file mode 100644
index 00000000000..1871b72b1a7
--- /dev/null
+++ b/arch/arm/mach-sti/smp.h
@@ -0,0 +1,17 @@
+/*
+ * arch/arm/mach-sti/smp.h
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * http://www.st.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MACH_STI_SMP_H
+#define __MACH_STI_SMP_H
+
+extern struct smp_operations sti_smp_ops;
+
+#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 02:53:03 +0000