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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>
This commit is contained in:
Ralf Baechle 2005-03-01 18:12:06 +00:00
parent 0f04afb595
commit 5068debff2
1 changed files with 21 additions and 0 deletions
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21
include/asm-mips/hazards.h
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@ -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__ */