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| author | Magnus Damm <damm@igel.co.jp> | 2009-02-27 16:41:17 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-02-27 16:41:17 +0900 |
| commit | 0197f21ca5c5ed0df2a14a60ef073e8163e6533b (patch) | |
| tree | d5068ed91e1e9b438d46934c50d97dcadd24e8bb | |
| parent | 4f099ebb27211d378304ddcfa507097f5128f5b9 (diff) | |
| download | kernel_samsung_smdk4412-0197f21ca5c5ed0df2a14a60ef073e8163e6533b.zip kernel_samsung_smdk4412-0197f21ca5c5ed0df2a14a60ef073e8163e6533b.tar.gz kernel_samsung_smdk4412-0197f21ca5c5ed0df2a14a60ef073e8163e6533b.tar.bz2 | |
sh: prefetch early exception data on sh4/sh4a.
Prefetch early exception data. There is unused space in our
exception handler cache line anyway, so this is almost free.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | arch/sh/include/asm/entry-macros.S | 5 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh3/entry.S | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/sh/include/asm/entry-macros.S b/arch/sh/include/asm/entry-macros.S index 2dab0b8..3a4752a 100644 --- a/arch/sh/include/asm/entry-macros.S +++ b/arch/sh/include/asm/entry-macros.S @@ -31,3 +31,8 @@ #endif .endm +#if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH4) +# define PREF(x) pref @x +#else +# define PREF(x) nop +#endif diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S index 0271fe0..e984e94 100644 --- a/arch/sh/kernel/cpu/sh3/entry.S +++ b/arch/sh/kernel/cpu/sh3/entry.S @@ -463,9 +463,11 @@ tlb_miss: sts pr, k3 ! save original pr value in k3 handle_exception: + mova exception_data, k0 + ! Setup stack and save DSP context (k0 contains original r15 on return) bsr prepare_stack_save_dsp - nop + PREF(k0) ! Save registers / Switch to bank 0 mov.l 5f, k2 ! vector register address @@ -556,10 +558,11 @@ ENTRY(handle_interrupt) 11: #endif /* defined(CONFIG_KGDB) */ sts pr, k3 ! save original pr value in k3 + mova exception_data, k0 ! Setup stack and save DSP context (k0 contains original r15 on return) bsr prepare_stack_save_dsp - nop + PREF(k0) ! Save registers / Switch to bank 0 bsr save_regs ! needs original pr value in k3 |