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2009-07-09linker script: unify usage of discard definitionTejun Heo
Discarded sections in different archs share some commonality but have considerable differences. This led to linker script for each arch implementing its own /DISCARD/ definition, which makes maintaining tedious and adding new entries error-prone. This patch makes all linker scripts to move discard definitions to the end of the linker script and use the common DISCARDS macro. As ld uses the first matching section definition, archs can include default discarded sections by including them earlier in the linker script. ia64 is notable because it first throws away some ia64 specific subsections and then include the rest of the sections into the final image, so those sections must be discarded before the inclusion. defconfig compile tested for x86, x86-64, powerpc, powerpc64, ia64, alpha, sparc, sparc64 and s390. Michal Simek tested microblaze. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Tested-by: Michal Simek <monstr@monstr.eu> Cc: linux-arch@vger.kernel.org Cc: Michal Simek <monstr@monstr.eu> Cc: microblaze-uclinux@itee.uq.edu.au Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Tony Luck <tony.luck@intel.com>
2009-07-09microblaze: include EXIT_TEXT to _stextMichal Simek
Microblaze wants to throw out EXIT_TEXT during runtime too. This hasn't caused trouble till now because the linker script didn't discard EXIT_TEXT and it ended up in its default output section. As discard definition is about to be unified, include EXIT_TEXT into _stext explicitly and while at it replace explicit exitcall definition to EXIT_CALL. Signed-off-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Tejun Heo <tj@kernel.org>
2009-06-24linker script: throw away .discard sectionTejun Heo
x86 throws away .discard section but no other archs do. Also, .discard is not thrown away while linking modules. Make every arch and module linking throw it away. This will be used to define dummy variables for percpu declarations and definitions. This patch is based on Ivan Kokshaysky's alpha percpu patch. [ Impact: always throw away everything in .discard ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Bryan Wu <cooloney@kernel.org> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@elte.hu>
2009-06-20microblaze: Add missing symbols for CONSTRUCTORS supportMichal Simek
Commit b99b87f70c7785ab1e253c6220f4b0b57ce3a7f7 add CONSTRUCTOR support to Linux but Microblaze not defined KERNEL_CTORS symbols which are used with that patch. This patch fixed it. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-06-20microblaze: remove init_mmArnd Bergmann
Alexey removed the definition for init_mm from all architectures but forgot microblaze, which was only recently added. This fixes the microblaze build by dropping it there as well. Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-30microblaze: Fix problem with early_printk in startupMichal Simek
Problem arise when is incopatibility between kernel/dts/pvr and kernel tries to announce it. Early printk device (uartlite in our case) was in TLB 2 and when kernel extract DTB it necessary to allocate at least one TLB at the end of memory. First free TLB was number two where was early printk. But checking mechanism (kernel/dts/pvr) was after extrahing but TLB 2 was different. This caused that kernel hung up. Moving early printk device to TLB 63 solve it and we don't protect it which means that we can use early_printk messages only for initial parts of kernel then we rewrite TLB 63. Reported-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: MakefilesMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Update signal returning addressMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Traps MMU updateMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Enable fork syscall for MMU and add fork as vfork for noMMUMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Update linker script for MMUMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Add MMU related exceptions handlingMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Update exception handling - MMU exceptionMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: entry.S, entry.hMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: MMU asm offset updateMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Update process creation for MMUMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: TLB low level codeMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: Alocate TLB for early consoleMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26microblaze_mmu_v2: MMU update for startup codeMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: Fix cast warning for __va in prom.cMichal Simek
__va expect 32bit value but of_read_ulong(of_read_number) returns 64bit value Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: Cleanup compiled-in rootfs in BSS sectionMichal Simek
This patch is based on patch from Steve Magnani. There were bug for compiled-in rootfs. We have to move moving rootfs which is in BSS section to _ebss section which is at the end of kernel and then clear bss section not vice-versa. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: Fix early cmdline for CMDLINE_FORCEMichal Simek
This patch fixed parsing early parameters because current implementation does that early parse DTS command line and then parse CMDLINE line which is compiled-in. For case that DTS doesn't contain command line is copied command line from kernel with is done in prom.c that's why I can remove it from machine_early_init. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: prepare signal handling for generic unistd.hMichal Simek
We need to define set_restore_sigmask() in order to get pselect and ppoll. Also, the setup_frame function can not be used when __NR_sigreturn is not defined. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: add security initcallsArnd Bergmann
The security subsystem has its own initcalls, which need support in vmlinux.lds.S. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: kill incorrect __bad_xchg definitionArnd Bergmann
The whole point of the __bad_xchg declaration in system.h is to give a linker error when a variable of invalid size is passed to __xchg. The out of line definition in traps.c defeats this purpose and does not any value, so remove it here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: fix __user annotationsArnd Bergmann
The microblaze signal handling code gets some __user pointers wrong, as shown by sparse. This adds the annotations where appropriate and change sys_rt_sigreturn to correctly pass a user stack down to do_sigaltstack instead of a kernel structure. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-21microblaze: export some symbolsArnd Bergmann
Some device drivers require the symbols _ebss, kernel_thread, __page_offset or ___range_ok, so export them. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-18microblaze: Fix kind-of-intr checking against number of interruptsMichal Simek
+ Fix typographic fault. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-01microblaze: Fix return value for sys_ipcMichal Simek
Signed-off-by: John Linn <john.linn@xilinx.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-01microblaze: Storage class should be before const qualifierTobias Klauser
The C99 specification states in section 6.11.5: The placement of a storage-class specifier other than at the beginning of the declaration specifiers in a declaration is an obsolescent feature. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: add parameter to microblaze_read()Coly Li
This patch modifies parameter of microblaze_read() from 'void' to 'struct clocksource *cs', which fixes compile warning for incompatible parameter type. Signed-off-by: Coly Li <coly.li@suse.de> Cc: Michal Simek <monstr@monstr.eu> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Add STATE_SAVE_ARG_SPACE for noMMU kernel tooMichal Simek
For noMMU kernel this change nothing bring but this change helps with MMU synchronization. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Do not check use_dcacheMichal Simek
It is not necessary to check cpuinfo.use_dcache because this checking is done in function which call that functions Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Do not use PVR configuration for broken MB versionMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Fix USR1/2 pvr printing messageMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: iowrite upon timeoutRoel Kluin
retries reaches -1, so the iowrite occurrs upon timeout. Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Remove redundant variableMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Move start_thread to process.cMichal Simek
This change is due to upcomming MMU merge Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Add missing preadv and pwritev syscallsMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Remove sparse error in traps.cMichal Simek
CHECK arch/microblaze/kernel/traps.c arch/microblaze/kernel/traps.c:37:47: warning: Using plain integer as NULL pointer CC arch/microblaze/kernel/traps.o Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Rename kernel_mode to pt_mode in pt_regsMichal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-23microblaze: Remove while(1) loop from show_regs functionMichal Simek
I removed it because of show_regs can't break die function. If process/kernel failed, die (do_exit) function resolve it. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-14microblaze: remove duplicated #include'sHuang Weiyi
Remove duplicated #include's in arch/microblaze/include/asm/io.h arch/microblaze/kernel/prom.c arch/microblaze/kernel/ptrace.c arch/microblaze/kernel/signal.c arch/microblaze/kernel/sys_microblaze.c Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-14microblaze: struct device - replace bus_id with dev_name()Michal Simek
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-14microblaze: Simplify copy_thread()Michal Simek
Removing nr parameter from copy_tread function commit 6f2c55b843836d26528c56a0968689accaedbc67 Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27microblaze_v8: Makefiles for Microblaze cpuMichal Simek
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27microblaze_v8: Interrupt handling and timer supportMichal Simek
Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27microblaze_v8: traps supportMichal Simek
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27microblaze_v8: IPC supportMichal Simek
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27microblaze_v8: ptrace supportMichal Simek
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
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