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Commit 5068debf authored by Ralf Baechle's avatar Ralf Baechle
Browse files

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: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0f04afb5

include/asm-mips/hazards.h

+21 −0
Original line number Diff line number Diff line
@@ -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__ */