diff options
Diffstat (limited to 'arch/arc/include/asm/io.h')
| -rw-r--r-- | arch/arc/include/asm/io.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h new file mode 100644 index 0000000000..24b7337308 --- /dev/null +++ b/arch/arc/include/asm/io.h @@ -0,0 +1,218 @@ +/* + * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_ARC_IO_H +#define __ASM_ARC_IO_H + +#include <linux/types.h> +#include <asm/byteorder.h> + +static inline void sync(void) +{ + /* Not yet implemented */ +} + +static inline u8 __raw_readb(const volatile void __iomem *addr) +{ + u8 b; + + __asm__ __volatile__("ldb%U1 %0, %1\n" + : "=r" (b) + : "m" (*(volatile u8 __force *)addr) + : "memory"); + return b; +} + +static inline u16 __raw_readw(const volatile void __iomem *addr) +{ + u16 s; + + __asm__ __volatile__("ldw%U1 %0, %1\n" + : "=r" (s) + : "m" (*(volatile u16 __force *)addr) + : "memory"); + return s; +} + +static inline u32 __raw_readl(const volatile void __iomem *addr) +{ + u32 w; + + __asm__ __volatile__("ld%U1 %0, %1\n" + : "=r" (w) + : "m" (*(volatile u32 __force *)addr) + : "memory"); + return w; +} + +#define readb __raw_readb + +static inline u16 readw(const volatile void __iomem *addr) +{ + return __le16_to_cpu(__raw_readw(addr)); +} + +static inline u32 readl(const volatile void __iomem *addr) +{ + return __le32_to_cpu(__raw_readl(addr)); +} + +static inline void __raw_writeb(u8 b, volatile void __iomem *addr) +{ + __asm__ __volatile__("stb%U1 %0, %1\n" + : + : "r" (b), "m" (*(volatile u8 __force *)addr) + : "memory"); +} + +static inline void __raw_writew(u16 s, volatile void __iomem *addr) +{ + __asm__ __volatile__("stw%U1 %0, %1\n" + : + : "r" (s), "m" (*(volatile u16 __force *)addr) + : "memory"); +} + +static inline void __raw_writel(u32 w, volatile void __iomem *addr) +{ + __asm__ __volatile__("st%U1 %0, %1\n" + : + : "r" (w), "m" (*(volatile u32 __force *)addr) + : "memory"); +} + +#define writeb __raw_writeb +#define writew(b, addr) __raw_writew(__cpu_to_le16(b), addr) +#define writel(b, addr) __raw_writel(__cpu_to_le32(b), addr) + +static inline int __raw_readsb(unsigned int addr, void *data, int bytelen) +{ + __asm__ __volatile__ ("1:ld.di r8, [r0]\n" + "sub.f r2, r2, 1\n" + "bnz.d 1b\n" + "stb.ab r8, [r1, 1]\n" + : + : "r" (addr), "r" (data), "r" (bytelen) + : "r8"); + return bytelen; +} + +static inline int __raw_readsw(unsigned int addr, void *data, int wordlen) +{ + __asm__ __volatile__ ("1:ld.di r8, [r0]\n" + "sub.f r2, r2, 1\n" + "bnz.d 1b\n" + "stw.ab r8, [r1, 2]\n" + : + : "r" (addr), "r" (data), "r" (wordlen) + : "r8"); + return wordlen; +} + +static inline int __raw_readsl(unsigned int addr, void *data, int longlen) +{ + __asm__ __volatile__ ("1:ld.di r8, [r0]\n" + "sub.f r2, r2, 1\n" + "bnz.d 1b\n" + "st.ab r8, [r1, 4]\n" + : + : "r" (addr), "r" (data), "r" (longlen) + : "r8"); + return longlen; +} + +static inline int __raw_writesb(unsigned int addr, void *data, int bytelen) +{ + __asm__ __volatile__ ("1:ldb.ab r8, [r1, 1]\n" + "sub.f r2, r2, 1\n" + "bnz.d 1b\n" + "st.di r8, [r0, 0]\n" + : + : "r" (addr), "r" (data), "r" (bytelen) + : "r8"); + return bytelen; +} + +static inline int __raw_writesw(unsigned int addr, void *data, int wordlen) +{ + __asm__ __volatile__ ("1:ldw.ab r8, [r1, 2]\n" + "sub.f r2, r2, 1\n" + "bnz.d 1b\n" + "st.ab.di r8, [r0, 0]\n" + : + : "r" (addr), "r" (data), "r" (wordlen) + : "r8"); + return wordlen; +} + +static inline int __raw_writesl(unsigned int addr, void *data, int longlen) +{ + __asm__ __volatile__ ("1:ld.ab r8, [r1, 4]\n" + "sub.f r2, r2, 1\n" + "bnz.d 1b\n" + "st.ab.di r8, [r0, 0]\n" + : + : "r" (addr), "r" (data), "r" (longlen) + : "r8"); + return longlen; +} + +#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_le32(a, v) out_arch(l, le32, a, v) +#define out_le16(a, v) out_arch(w, le16, a, v) + +#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) + +/* + * 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) + +#endif /* __ASM_ARC_IO_H */ |