diff options
Diffstat (limited to 'include/io.h')
| -rw-r--r-- | include/io.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/include/io.h b/include/io.h new file mode 100644 index 0000000..45a385e --- /dev/null +++ b/include/io.h @@ -0,0 +1,175 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __IO_H +#define __IO_H + +#ifndef __ASSEMBLY__ + +#include <compiler.h> +#include <stdint.h> +#include <processor.h> +#include <ccan/endian/endian.h> + +/* + * IO access functions + * + * __in_beXX() / __out_beXX() : non-byteswap, no barrier + * in_beXX() / out_beXX() : non-byteswap, barrier + * in_leXX() / out_leXX() : byteswap, barrier + */ + +static inline uint8_t __in_8(const volatile uint8_t *addr) +{ + uint8_t val; + asm volatile("lbzcix %0,0,%1" : + "=r"(val) : "r"(addr), "m"(*addr) : "memory"); + return val; +} + +static inline uint8_t in_8(const volatile uint8_t *addr) +{ + sync(); + return __in_8(addr); +} + +static inline uint16_t __in_be16(const volatile uint16_t *addr) +{ + uint16_t val; + asm volatile("lhzcix %0,0,%1" : + "=r"(val) : "r"(addr), "m"(*addr) : "memory"); + return val; +} + +static inline uint16_t in_be16(const volatile uint16_t *addr) +{ + sync(); + return __in_be16(addr); +} + +static inline uint16_t in_le16(const volatile uint16_t *addr) +{ + return bswap_16(in_be16(addr)); +} + +static inline uint32_t __in_be32(const volatile uint32_t *addr) +{ + uint32_t val; + asm volatile("lwzcix %0,0,%1" : + "=r"(val) : "r"(addr), "m"(*addr) : "memory"); + return val; +} + +static inline uint32_t in_be32(const volatile uint32_t *addr) +{ + sync(); + return __in_be32(addr); +} + +static inline uint32_t in_le32(const volatile uint32_t *addr) +{ + return bswap_32(in_be32(addr)); +} + +static inline uint64_t __in_be64(const volatile uint64_t *addr) +{ + uint64_t val; + asm volatile("ldcix %0,0,%1" : + "=r"(val) : "r"(addr), "m"(*addr) : "memory"); + return val; +} + +static inline uint64_t in_be64(const volatile uint64_t *addr) +{ + sync(); + return __in_be64(addr); +} + +static inline uint64_t in_le64(const volatile uint64_t *addr) +{ + return bswap_64(in_be64(addr)); +} + +static inline void __out_8(volatile uint8_t *addr, uint8_t val) +{ + asm volatile("stbcix %0,0,%1" + : : "r"(val), "r"(addr), "m"(*addr) : "memory"); +} + +static inline void out_8(volatile uint8_t *addr, uint8_t val) +{ + sync(); + return __out_8(addr, val); +} + +static inline void __out_be16(volatile uint16_t *addr, uint16_t val) +{ + asm volatile("sthcix %0,0,%1" + : : "r"(val), "r"(addr), "m"(*addr) : "memory"); +} + +static inline void out_be16(volatile uint16_t *addr, uint16_t val) +{ + sync(); + return __out_be16(addr, val); +} + +static inline void out_le16(volatile uint16_t *addr, uint16_t val) +{ + out_be16(addr, bswap_16(val)); +} + +static inline void __out_be32(volatile uint32_t *addr, uint32_t val) +{ + asm volatile("stwcix %0,0,%1" + : : "r"(val), "r"(addr), "m"(*addr) : "memory"); +} + +static inline void out_be32(volatile uint32_t *addr, uint32_t val) +{ + sync(); + return __out_be32(addr, val); +} + +static inline void out_le32(volatile uint32_t *addr, uint32_t val) +{ + out_be32(addr, bswap_32(val)); +} + +static inline void __out_be64(volatile uint64_t *addr, uint64_t val) +{ + asm volatile("stdcix %0,0,%1" + : : "r"(val), "r"(addr), "m"(*addr) : "memory"); +} + +static inline void out_be64(volatile uint64_t *addr, uint64_t val) +{ + sync(); + return __out_be64(addr, val); +} + +static inline void out_le64(volatile uint64_t *addr, uint64_t val) +{ + out_be64(addr, bswap_64(val)); +} + +/* Assistant to macros used to access PCI config space */ +#define in_le8 in_8 +#define out_le8 out_8 + +#endif /* __ASSEMBLY__ */ + +#endif /* __IO_H */ |