PPC: add accessor macros to clear and set bits in one shot
PATCH v2 1/1 PPC: add accessor macros to clear and set bits in one shot
PPC: add accessor macros to clear and set bits in one shot
This patch adds macros from linux/include/asm-powerpc/io.h to clear and set bits in one shot using the in_be32, out_be32, etc. accessor functions. They are very handy to manipulate bits it I/O registers.
This patch is required for my forthcoming FSL NAND UPM driver re-write and the support for the TQM8548 module.
Signed-off-by Wolfgang Grandegger <[email protected]>
--- include/asm-ppc/io.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
include/asm-ppc/io.h +36 -0
@@ -238,6 +238,42 @@ extern inline void out_be32(volatile uns __asm__ __volatile__("sync; stw%U0%X0 %1,%0" :"=m" (*addr) :"r" (val)); } +/* Clear and set bits in one shot. These macros can be used to clear and +* set multiple bits in a register using a single call. 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 clrbits (type, addr, clear) \ + out_##type((addr), in_##type(addr) & ~(clear)) + +#define setbits (type, addr, set) \ + out_##type((addr), in_##type(addr) | (set)) + +#define clrsetbits (type, addr, clear, set) \ + out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) + +#define clrbits_be32 (addr, clear) clrbits(be32, addr, clear) +#define setbits_be32 (addr, set) setbits(be32, addr, set) +#define clrsetbits_be32 (addr, clear, set) clrsetbits(be32, addr, clear, set) + +#define clrbits_le32 (addr, clear) clrbits(le32, addr, clear) +#define setbits_le32 (addr, set) setbits(le32, addr, set) +#define clrsetbits_le32 (addr, clear, set) clrsetbits(le32, addr, clear, set) + +#define clrbits_be16 (addr, clear) clrbits(be16, addr, clear) +#define setbits_be16 (addr, set) setbits(be16, addr, set) +#define clrsetbits_be16 (addr, clear, set) clrsetbits(be16, addr, clear, set) + +#define clrbits_le16 (addr, clear) clrbits(le16, addr, clear) +#define setbits_le16 (addr, set) setbits(le16, addr, set) +#define clrsetbits_le16 (addr, clear, set) clrsetbits(le16, addr, clear, set) + +#define clrbits_8 (addr, clear) clrbits(8, addr, clear) +#define setbits_8 (addr, set) setbits(8, addr, set) +#define clrsetbits_8 (addr, clear, set) clrsetbits(8, addr, clear, set) +/* * Given a physical address and a length, return a virtual address * that can be used to access the memory range with the caching