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Commit ed7eb5aa authored by Paul Burton's avatar Paul Burton Committed by Ralf Baechle
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MIPS: CPS: Introduce register modify (set/clear/change) accessors 



For read-write registers introduce accessor functions that simplify the
task of modifying a subset of bits within the register. set_* functions
set bits to 1, clear_* functions clear bits to 0 & change_* functions
set bits specified in a mask to an arbitrary value.

Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17004/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 829ca2be

arch/mips/include/asm/mips-cps.h

+22 −1
Original line number Diff line number Diff line
@@ -71,6 +71,26 @@ static inline void write_##unit##_##name(uint##sz##_t val) \ 
	}								\

}



#define CPS_ACCESSOR_M(unit, sz, name)					\

static inline void change_##unit##_##name(uint##sz##_t mask,		\

					  uint##sz##_t val)		\

{									\

	uint##sz##_t reg_val = read_##unit##_##name();			\

	reg_val &= ~mask;						\

	reg_val |= val;							\

	write_##unit##_##name(reg_val);					\

}									\

									\

static inline void set_##unit##_##name(uint##sz##_t val)		\

{									\

	change_##unit##_##name(val, val);				\

}									\

									\

static inline void clear_##unit##_##name(uint##sz##_t val)		\

{									\

	change_##unit##_##name(val, 0);					\

}



#define CPS_ACCESSOR_RO(unit, sz, off, name)				\

	CPS_ACCESSOR_A(unit, off, name)					\

	CPS_ACCESSOR_R(unit, sz, name)
@@ -82,6 +102,7 @@ static inline void write_##unit##_##name(uint##sz##_t val) \ 
#define CPS_ACCESSOR_RW(unit, sz, off, name)				\

	CPS_ACCESSOR_A(unit, off, name)					\

	CPS_ACCESSOR_R(unit, sz, name)					\

	CPS_ACCESSOR_W(unit, sz, name)

	CPS_ACCESSOR_W(unit, sz, name)					\

	CPS_ACCESSOR_M(unit, sz, name)



#endif /* __MIPS_ASM_MIPS_CPS_H__ */