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sh: Add bit control functions

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This provide bit control functions as clrbits_*, setbits_* and
clrsetbits_*.

V2: Fix comment style and error of whitespace.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Nobuhiro Iwamatsu 2012-02-15 16:47:01 +09:00 committed by Nobuhiro Iwamatsu
parent 8ca805e102
commit 1379c51ea5
1 changed files with 40 additions and 3 deletions
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43
arch/sh/include/asm/io.h
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@ -147,13 +147,13 @@ extern void __iounmap(void *addr);
*/ */
#ifdef iomem_valid_addr #ifdef iomem_valid_addr
#define __arch_ioremap(off, sz, nocache) \ #define __arch_ioremap(off, sz, nocache) \
({ \ ({ \
unsigned long _off = (off), _size = (sz); \ unsigned long _off = (off), _size = (sz); \
void *_ret = (void *)0; \ void *_ret = (void *)0; \
if (iomem_valid_addr(_off, _size)) \ if (iomem_valid_addr(_off, _size)) \
_ret = __ioremap(iomem_to_phys(_off), _size, 0); \ _ret = __ioremap(iomem_to_phys(_off), _size, 0); \
_ret; \ _ret; \
}) })
#define __arch_iounmap __iounmap #define __arch_iounmap __iounmap
#endif #endif
@ -237,6 +237,43 @@ static inline void sync(void)
{ {
} }
/*
* 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 * Given a physical address and a length, return a virtual address
* that can be used to access the memory range with the caching * that can be used to access the memory range with the caching
@ -261,7 +298,7 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
} }
static inline phys_addr_t virt_to_phys(void * vaddr) static inline phys_addr_t virt_to_phys(void *vaddr)
{ {
return (phys_addr_t)(vaddr); return (phys_addr_t)(vaddr);
} }