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powerpc: Move the patch_exception to a common place

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So that it can be used by other codes. No function change.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Kevin Hao
2013-05-12 07:26:22 +08:00
committed by Benjamin Herrenschmidt
parent e9419669fa
commit 1e8341ae0c
3 changed files with 22 additions and 19 deletions
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19
arch/powerpc/mm/tlb_nohash.c
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@@ -518,25 +518,6 @@ static void setup_page_sizes(void)
}
}
static void __patch_exception(int exc, unsigned long addr)
{
extern unsigned int interrupt_base_book3e;
unsigned int *ibase = &interrupt_base_book3e;
/* Our exceptions vectors start with a NOP and -then- a branch
* to deal with single stepping from userspace which stops on
* the second instruction. Thus we need to patch the second
* instruction of the exception, not the first one
*/
patch_branch(ibase + (exc / 4) + 1, addr, 0);
}
#define patch_exception(exc, name) do { \
extern unsigned int name; \
__patch_exception((exc), (unsigned long)&name); \
} while (0)
static void setup_mmu_htw(void)
{
/* Check if HW tablewalk is present, and if yes, enable it by: