diff options
author | Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> | 2012-02-15 16:47:01 +0900 |
---|---|---|
committer | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2012-05-28 09:12:53 +0900 |
commit | 1379c51ea5cbffe68016d61d37108750db26fc33 (patch) | |
tree | 0b1145daee7b0c707617f63fac50742c8114c731 /arch | |
parent | 8ca805e1022679738ae27b7c1153781b65836ac8 (diff) | |
download | u-boot-imx-1379c51ea5cbffe68016d61d37108750db26fc33.zip u-boot-imx-1379c51ea5cbffe68016d61d37108750db26fc33.tar.gz u-boot-imx-1379c51ea5cbffe68016d61d37108750db26fc33.tar.bz2 |
sh: Add bit control functions
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/sh/include/asm/io.h | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h index ca598a6..0a00db3 100644 --- a/arch/sh/include/asm/io.h +++ b/arch/sh/include/asm/io.h @@ -147,13 +147,13 @@ extern void __iounmap(void *addr); */ #ifdef iomem_valid_addr #define __arch_ioremap(off, sz, nocache) \ - ({ \ +({ \ unsigned long _off = (off), _size = (sz); \ void *_ret = (void *)0; \ if (iomem_valid_addr(_off, _size)) \ _ret = __ioremap(iomem_to_phys(_off), _size, 0); \ _ret; \ - }) +}) #define __arch_iounmap __iounmap #endif @@ -238,6 +238,43 @@ 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 * that can be used to access the memory range with the caching * properties specified by "flags". @@ -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); } |