diff options
| author | Kevin Hao <haokexin@gmail.com> | 2013-05-12 07:26:22 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-12-02 14:06:54 +1100 |
| commit | 1e8341ae0c0e117f0626cd6cf6732a0a9c8723f2 (patch) | |
| tree | 61b9d4f33170120c060466bc4bc85586cddb3a26 | |
| parent | e9419669faacf90e7a4e648d38f61c067a47c0ff (diff) | |
powerpc: Move the patch_exception to a common place
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>
| -rw-r--r-- | arch/powerpc/include/asm/code-patching.h | 7 | ||||
| -rw-r--r-- | arch/powerpc/lib/code-patching.c | 15 | ||||
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 19 |
3 files changed, 22 insertions, 19 deletions
diff --git a/arch/powerpc/include/asm/code-patching.h b/arch/powerpc/include/asm/code-patching.h index a6f8c7a5cbb..97e02f985df 100644 --- a/arch/powerpc/include/asm/code-patching.h +++ b/arch/powerpc/include/asm/code-patching.h @@ -34,6 +34,13 @@ int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr); unsigned long branch_target(const unsigned int *instr); unsigned int translate_branch(const unsigned int *dest, const unsigned int *src); +#ifdef CONFIG_PPC_BOOK3E_64 +void __patch_exception(int exc, unsigned long addr); +#define patch_exception(exc, name) do { \ + extern unsigned int name; \ + __patch_exception((exc), (unsigned long)&name); \ +} while (0) +#endif static inline unsigned long ppc_function_entry(void *func) { diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c index 17e5b236431..d5edbeb8eb8 100644 --- a/arch/powerpc/lib/code-patching.c +++ b/arch/powerpc/lib/code-patching.c @@ -159,6 +159,21 @@ unsigned int translate_branch(const unsigned int *dest, const unsigned int *src) return 0; } +#ifdef CONFIG_PPC_BOOK3E_64 +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); +} +#endif #ifdef CONFIG_CODE_PATCHING_SELFTEST diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index 358d7430313..8805b7b87dc 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -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: |