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Diffstat (limited to 'src/arch/arm/include/armv4/arch/io.h')
| -rw-r--r-- | src/arch/arm/include/armv4/arch/io.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/arch/arm/include/armv4/arch/io.h b/src/arch/arm/include/armv4/arch/io.h new file mode 100644 index 0000000000..12af03827b --- /dev/null +++ b/src/arch/arm/include/armv4/arch/io.h @@ -0,0 +1,59 @@ +/* + * Originally imported from linux/include/asm-arm/io.h. This file has changed + * substantially since then. + * + * Copyright 2013 Google Inc. + * Copyright (C) 1996-2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Modifications: + * 08-Apr-2013 G Replaced several macros with inlines for type safety. + * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both + * constant addresses and variable addresses. + * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture + * specific IO header files. + * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. + * 04-Apr-1999 PJB Added check_signature. + * 12-Dec-1999 RMK More cleanups + * 18-Jun-2000 RMK Removed virt_to_* and friends definitions + */ +#ifndef __ARCH_IO_H +#define __ARCH_IO_H + +#include <endian.h> +#include <stdint.h> + +static inline uint8_t read8(const void *addr) +{ + return *(volatile uint8_t *)addr; +} + +static inline uint16_t read16(const void *addr) +{ + return *(volatile uint16_t *)addr; +} + +static inline uint32_t read32(const void *addr) +{ + return *(volatile uint32_t *)addr; +} + +static inline void write8(void *addr, uint8_t val) +{ + *(volatile uint8_t *)addr = val; +} + +static inline void write16(void *addr, uint16_t val) +{ + *(volatile uint16_t *)addr = val; +} + +static inline void write32(void *addr, uint32_t val) +{ + *(volatile uint32_t *)addr = val; +} + +#endif /* __ARCH_IO_H */ |