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[ARM] nommu: fixups for the exception vectors

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The high page vector (0xFFFF0000) does not supported in nommu mode.
This patch allows the vectors to be 0x00000000 or the begining of DRAM
in nommu mode.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Hyok S. Choi
2006-03-27 15:18:50 +01:00
committed by Russell King
parent f8c07de6be
commit c760fc1997
4 changed files with 31 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/kernel/signal.h
View File

@ -7,6 +7,6 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define KERN_SIGRETURN_CODE 0xffff0500
#define KERN_SIGRETURN_CODE (CONFIG_VECTORS_BASE + 0x00000500)
extern const unsigned long sigreturn_codes[7];

9
arch/arm/kernel/traps.c
View File

@ -688,6 +688,7 @@ EXPORT_SYMBOL(abort);
void __init trap_init(void)
{
unsigned long vectors = CONFIG_VECTORS_BASE;
extern char __stubs_start[], __stubs_end[];
extern char __vectors_start[], __vectors_end[];
extern char __kuser_helper_start[], __kuser_helper_end[];
@ -698,9 +699,9 @@ void __init trap_init(void)
* into the vector page, mapped at 0xffff0000, and ensure these
* are visible to the instruction stream.
*/
memcpy((void *)0xffff0000, __vectors_start, __vectors_end - __vectors_start);
memcpy((void *)0xffff0200, __stubs_start, __stubs_end - __stubs_start);
memcpy((void *)0xffff1000 - kuser_sz, __kuser_helper_start, kuser_sz);
memcpy((void *)vectors, __vectors_start, __vectors_end - __vectors_start);
memcpy((void *)vectors + 0x200, __stubs_start, __stubs_end - __stubs_start);
memcpy((void *)vectors + 0x1000 - kuser_sz, __kuser_helper_start, kuser_sz);
/*
* Copy signal return handlers into the vector page, and
@ -709,6 +710,6 @@ void __init trap_init(void)
memcpy((void *)KERN_SIGRETURN_CODE, sigreturn_codes,
sizeof(sigreturn_codes));
flush_icache_range(0xffff0000, 0xffff0000 + PAGE_SIZE);
flush_icache_range(vectors, vectors + PAGE_SIZE);
modify_domain(DOMAIN_USER, DOMAIN_CLIENT);
}