diff options
Diffstat (limited to 'src/include/mmio.h')
| -rw-r--r-- | src/include/mmio.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/include/mmio.h b/src/include/mmio.h new file mode 100644 index 0000000000..4f2c806cac --- /dev/null +++ b/src/include/mmio.h @@ -0,0 +1,45 @@ +/* + * This file is part of the coreboot project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * mmio.h provides update*() as well as read/write*() from arch/mmio.h + */ + +#ifndef __MMIO_H__ +#define __MMIO_H__ + +#include <arch/mmio.h> +#include <stdint.h> + +static __always_inline void update8(volatile void *addr, uint8_t mask, uint8_t or) +{ + uint8_t reg = read8(addr); + reg = (reg & mask) | or; + write8(addr, reg); +} + +static __always_inline void update16(volatile void *addr, uint16_t mask, uint16_t or) +{ + uint16_t reg = read16(addr); + reg = (reg & mask) | or; + write16(addr, reg); +} + +static __always_inline void update32(volatile void *addr, uint32_t mask, uint32_t or) +{ + uint32_t reg = read32(addr); + reg = (reg & mask) | or; + write32(addr, reg); +} + +#endif /* __MMIO_H__ */ |