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Diffstat (limited to 'core/include/io.h')
-rw-r--r-- | core/include/io.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/core/include/io.h b/core/include/io.h new file mode 100644 index 0000000..510bf33 --- /dev/null +++ b/core/include/io.h @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2014, Linaro Limited + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef IO_H +#define IO_H + +#include <stdint.h> +#include <types_ext.h> + +/* + * IO access macro, please avoid using this macro, since it's going to be + * deprecated. + */ +#define IO(addr) (*((volatile unsigned long *)(addr))) + +static inline void write8(uint8_t val, vaddr_t addr) +{ + *(volatile uint8_t *)addr = val; +} + +static inline void write16(uint16_t val, vaddr_t addr) +{ + *(volatile uint16_t *)addr = val; +} + +static inline void write32(uint32_t val, vaddr_t addr) +{ + *(volatile uint32_t *)addr = val; +} + +static inline uint8_t read8(vaddr_t addr) +{ + return *(volatile uint8_t *)addr; +} + +static inline uint16_t read16(vaddr_t addr) +{ + return *(volatile uint16_t *)addr; +} + +static inline uint32_t read32(vaddr_t addr) +{ + return *(volatile uint32_t *)addr; +} + +static inline void io_mask8(vaddr_t addr, uint8_t val, uint8_t mask) +{ + write8((read8(addr) & ~mask) | (val & mask), addr); +} + +static inline void io_mask16(vaddr_t addr, uint16_t val, uint16_t mask) +{ + write16((read16(addr) & ~mask) | (val & mask), addr); +} + +static inline void io_mask32(vaddr_t addr, uint32_t val, uint32_t mask) +{ + write32((read32(addr) & ~mask) | (val & mask), addr); +} + +#endif /*IO_H*/ |