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| author | Ralf Baechle <ralf@linux-mips.org> | 2005-03-01 18:12:06 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2005-10-29 19:30:49 +0100 |
| commit | 5068debff2dcbc8f624811e3c06d60c7c0bba744 (patch) | |
| tree | 3d3a2ceceb91e6d5e9af7d28dfb4ddeed270c704 /include/asm-mips/hazards.h | |
| parent | 0f04afb59565c3029563b9a79b3513c9f3327a27 (diff) | |
| download | linux-5068debff2dcbc8f624811e3c06d60c7c0bba744.tar.gz | |
New hazard handling function back_to_back_c0_hazard() to handle back to
back mtc0 / mfc0 pairs from the same coprocessor register. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/hazards.h')
| -rw-r--r-- | include/asm-mips/hazards.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/asm-mips/hazards.h b/include/asm-mips/hazards.h index f524eaccd5f1..d6e88cf06ba9 100644 --- a/include/asm-mips/hazards.h +++ b/include/asm-mips/hazards.h @@ -124,6 +124,9 @@ __asm__( ".set\tmips32\n\t" \ "_ssnop; _ssnop; _ssnop; _ssnop\n\t" \ ".set\tmips0") + +#define back_to_back_c0_hazard() do { } while (0) + #else /* @@ -141,6 +144,12 @@ __asm__( "nop; nop; nop; nop; nop; nop;\n\t" \ ".set reorder\n\t") +#define back_to_back_c0_hazard() \ + __asm__ __volatile__( \ + " .set noreorder \n" \ + " nop; nop; nop \n" \ + " .set reorder \n") + #endif /* @@ -170,6 +179,10 @@ __asm__( __asm__ __volatile__( \ "_ehb\t\t\t\t# irq_disable_hazard") +#define back_to_back_c0_hazard() \ + __asm__ __volatile__( \ + "_ehb\t\t\t\t# back_to_back_c0_hazard") + #elif defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_RM9000) /* @@ -186,6 +199,8 @@ __asm__( #define irq_enable_hazard() do { } while (0) #define irq_disable_hazard() do { } while (0) +#define back_to_back_c0_hazard() do { } while (0) + #else /* @@ -210,6 +225,12 @@ __asm__( __asm__ __volatile__( \ "_ssnop; _ssnop; _ssnop;\t\t# irq_disable_hazard") +#define back_to_back_c0_hazard() \ + __asm__ __volatile__( \ + " .set noreorder \n" \ + " nop; nop; nop \n" \ + " .set reorder \n") + #endif #endif /* __ASSEMBLY__ */ |