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Will Deacon 2d81f1fe81 ARM: lib: add call_with_stack function for safely changing stack 
When disabling the MMU, it is necessary to take out a 1:1 identity map
of the reset code so that it can safely be executed with and without
the MMU active. To avoid the situation where the physical address of the
reset code aliases with the virtual address of the active stack (which
cannot be included in the 1:1 mapping), it is desirable to change to a
new stack at a location which is less likely to alias.

This code adds a new lib function, call_with_stack:

	void call_with_stack(void (*fn)(void *), void *arg, void *sp);

which changes the stack to point at the sp parameter, before invoking
fn(arg) with the new stack selected.

Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 		2011-12-12 16:07:35 +00:00
..
Makefile ARM: lib: add call_with_stack function for safely changing stack 2011-12-12 16:07:35 +00:00
ashldi3.S Thumb-2: Implement the unified arch/arm/lib functions 2009-07-24 12:32:57 +01:00
ashrdi3.S Thumb-2: Implement the unified arch/arm/lib functions 2009-07-24 12:32:57 +01:00
backtrace.S ARM: 7068/1: process: change from __backtrace to dump_stack in show_regs 2011-10-17 09:12:41 +01:00
bitops.h ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
call_with_stack.S ARM: lib: add call_with_stack function for safely changing stack 2011-12-12 16:07:35 +00:00
changebit.S ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
clear_user.S ARM: 6110/1: Fix Thumb-2 kernel builds when UACCESS_WITH_MEMCPY is enabled 2010-05-08 10:45:26 +01:00
clearbit.S ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
copy_from_user.S ARM: fix build error in arch/arm/kernel/process.c 2010-04-21 08:45:21 +01:00
copy_page.S ARM: 5701/1: ARM: copy_page.S: take into account the size of the cache line 2009-09-15 22:07:02 +01:00
copy_template.S Thumb-2: Implement the unified arch/arm/lib functions 2009-07-24 12:32:57 +01:00
copy_to_user.S ARM: 6110/1: Fix Thumb-2 kernel builds when UACCESS_WITH_MEMCPY is enabled 2010-05-08 10:45:26 +01:00
csumipv6.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
csumpartial.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
csumpartialcopy.S [ARM] 5231/1: Do not save the frame pointer in the csum_partial_copy_* functions 2008-09-01 12:06:35 +01:00
csumpartialcopygeneric.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
csumpartialcopyuser.S ARM: Fix csum_partial_copy_from_user() 2010-07-26 12:18:16 +01:00
delay.S ARM: udelay: prevent math rounding resulting in short udelays 2011-01-10 23:55:59 +00:00
div64.S ARM: 7125/1: Add unwinding annotations for 64bit division functions 2011-10-17 09:13:42 +01:00
ecard.S ARM: remove unnecessary mach/hardware.h includes 2011-07-12 11:19:27 -05:00
findbit.S ARM: 6482/2: Fix find_next_zero_bit and related assembly 2010-11-24 20:17:46 +00:00
floppydma.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
getuser.S ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs 2010-11-04 15:44:31 +00:00
io-acorn.S [ARM] Remove unnecessary asm/hardware.h includes 2006-03-21 22:05:50 +00:00
io-readsb.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
io-readsl.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
io-readsw-armv3.S ARM: remove unnecessary mach/hardware.h includes 2011-07-12 11:19:27 -05:00
io-readsw-armv4.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
io-shark.c [PATCH] ARM: 2815/1: Shark: new defconfig, fixes with __io and serial ports 2005-07-16 17:17:18 +01:00
io-writesb.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
io-writesl.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
io-writesw-armv3.S ARM: remove unnecessary mach/hardware.h includes 2011-07-12 11:19:27 -05:00
io-writesw-armv4.S Thumb-2: Implement the unified arch/arm/lib functions 2009-07-24 12:32:57 +01:00
lib1funcs.S ARM: 6945/1: Add unwinding support for division functions 2011-05-27 22:56:53 +01:00
lshrdi3.S Thumb-2: Implement the unified arch/arm/lib functions 2009-07-24 12:32:57 +01:00
memchr.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
memcpy.S Thumb-2: Implement the unified arch/arm/lib functions 2009-07-24 12:32:57 +01:00
memmove.S ARM: 6006/1: ARM: Use the correct NOP size in memmove for Thumb-2 kernel builds 2010-03-29 17:33:33 +01:00
memset.S [ARM] remove memzero() 2008-11-27 12:37:59 +00:00
memzero.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
muldi3.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
putuser.S ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs 2010-11-04 15:44:31 +00:00
setbit.S ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
strchr.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
strncpy_from_user.S ARM: fix build error in arch/arm/kernel/process.c 2010-04-21 08:45:21 +01:00
strnlen_user.S ARM: fix build error in arch/arm/kernel/process.c 2010-04-21 08:45:21 +01:00
strrchr.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
testchangebit.S ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
testclearbit.S ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
testsetbit.S ARM: 7171/1: unwind: add unwind directives to bitops assembly macros 2011-11-26 21:58:53 +00:00
uaccess.S ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs 2010-11-04 15:44:31 +00:00
uaccess_with_memcpy.c ARM: include linux/highmem.h in uaccess functions 2011-10-02 15:44:32 +02:00
ucmpdi2.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00