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Blackfin: new dynamic bfin read/write mmr helpers

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These are useful when working with C structs of MMRs as the appropriate
size is selected based on the given argument.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger
2009-12-26 15:25:56 +00:00
parent 222f6eb66e
commit f2521ce9ce
1 changed files with 17 additions and 0 deletions
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17
arch/blackfin/include/asm/def_LPBlackfin.h
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@@ -50,6 +50,23 @@
#define bfin_write16(addr, val) _bfin_writeX(addr, val, 16, w) #define bfin_write16(addr, val) _bfin_writeX(addr, val, 16, w)
#define bfin_write32(addr, val) _bfin_writeX(addr, val, 32, ) #define bfin_write32(addr, val) _bfin_writeX(addr, val, 32, )
#define bfin_read(addr) \
({ \
sizeof(*(addr)) == 1 ? bfin_read8(addr) : \
sizeof(*(addr)) == 2 ? bfin_read16(addr) : \
sizeof(*(addr)) == 4 ? bfin_read32(addr) : \
({ BUG(); 0; }); \
})
#define bfin_write(addr, val) \
({ \
switch (sizeof(*(addr))) { \
case 1: bfin_write8(addr, val); break; \
case 2: bfin_write16(addr, val); break; \
case 4: bfin_write32(addr, val); break; \
default: BUG(); \
} \
})
#endif /* __ASSEMBLY__ */ #endif /* __ASSEMBLY__ */
/************************************************** /**************************************************