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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-12-08 10:07:08 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-01-05 11:31:00 +0100 |
commit | 7f008630105ad1a0d250704ca8191020b43f79d5 (patch) | |
tree | 1850c8c44c67ce42bcbfbd811a36bb53c3b2a143 /arch/arm/include/asm/io.h | |
parent | 7a17b47240ab4a1de882f4975416dd08eb545450 (diff) | |
download | barebox-7f008630105ad1a0d250704ca8191020b43f79d5.tar.gz barebox-7f008630105ad1a0d250704ca8191020b43f79d5.tar.xz |
ARM: Add U-Boot specific io functions
To make it easier to adopt code from U-Boot.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/include/asm/io.h')
-rw-r--r-- | arch/arm/include/asm/io.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index ccf1f59013..850a99c6d9 100644 --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -12,4 +12,61 @@ extern void memcpy_fromio(void *, const volatile void __iomem *, size_t); extern void memcpy_toio(volatile void __iomem *, const void *, size_t); extern void memset_io(volatile void __iomem *, int, size_t); +/* + * 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 out_arch(type,endian,a,v) __raw_write##type(cpu_to_##endian(v),a) +#define in_arch(type,endian,a) endian##_to_cpu(__raw_read##type(a)) + +#define out_le64(a,v) out_arch(q,le64,a,v) +#define out_le32(a,v) out_arch(l,le32,a,v) +#define out_le16(a,v) out_arch(w,le16,a,v) + +#define in_le64(a) in_arch(q,le64,a) +#define in_le32(a) in_arch(l,le32,a) +#define in_le16(a) in_arch(w,le16,a) + +#define out_be32(a,v) out_arch(l,be32,a,v) +#define out_be16(a,v) out_arch(w,be16,a,v) + +#define in_be32(a) in_arch(l,be32,a) +#define in_be16(a) in_arch(w,be16,a) + +#define out_8(a,v) __raw_writeb(v,a) +#define in_8(a) __raw_readb(a) + +#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) + #endif /* __ASM_ARM_IO_H */ |