Commit dc967d7f authored by Timur Tabi's avatar Timur Tabi Committed by Kumar Gala

[POWERPC] add clrsetbits macros

This patch adds the clrsetbits_xxx() macros, which are used to set and clear
multiple bits in a single read-modify-write operation.  Specify the bits to
clear in the 'clear' parameter and the bits to set in the 'set' parameter.
These macros can also be used to set a multiple-bit bit pattern using a mask,
by specifying the mask in the 'clear' parameter and the new bit pattern in the
'set' parameter.  There are big-endian and little-endian versions for 8, 16,
32, and 64 bits.
Signed-off-by: default avatarTimur Tabi <timur@freescale.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 364f8ffc
...@@ -737,6 +737,29 @@ static inline void * bus_to_virt(unsigned long address) ...@@ -737,6 +737,29 @@ static inline void * bus_to_virt(unsigned long address)
#define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v)) #define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v))
#define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v)) #define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v))
/* Clear and set bits in one shot. These macros can be used to clear and
* set multiple bits in a register using a single read-modify-write. These
* macros can also be used to set a multiple-bit bit pattern using a mask,
* by specifying the mask in the 'clear' parameter and the new bit pattern
* in the 'set' parameter.
*/
#define clrsetbits(type, addr, clear, set) \
out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
#ifdef __powerpc64__
#define clrsetbits_be64(addr, clear, set) clrsetbits(be64, addr, clear, set)
#define clrsetbits_le64(addr, clear, set) clrsetbits(le64, addr, clear, set)
#endif
#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
#define clrsetbits_le16(addr, clear, set) clrsetbits(le32, addr, clear, set)
#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_IO_H */ #endif /* _ASM_POWERPC_IO_H */
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