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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: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17004/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2017-08-12 19:49:30 -07:00 committed by Ralf Baechle
parent 829ca2be9c
commit ed7eb5aad7
1 changed files with 22 additions and 1 deletions
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23
arch/mips/include/asm/mips-cps.h
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@ -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__ */