Travis Geiselbrecht | 1d0df69 | 2008-09-01 02:26:09 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008 Travis Geiselbrecht |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining |
| 5 | * a copy of this software and associated documentation files |
| 6 | * (the "Software"), to deal in the Software without restriction, |
| 7 | * including without limitation the rights to use, copy, modify, merge, |
| 8 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 9 | * and to permit persons to whom the Software is furnished to do so, |
| 10 | * subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | #ifndef __REG_H |
| 24 | #define __REG_H |
| 25 | |
| 26 | #include <sys/types.h> |
| 27 | |
| 28 | /* low level macros for accessing memory mapped hardware registers */ |
| 29 | #define REG64(addr) ((volatile uint64_t *)(addr)) |
| 30 | #define REG32(addr) ((volatile uint32_t *)(addr)) |
| 31 | #define REG16(addr) ((volatile uint16_t *)(addr)) |
| 32 | #define REG8(addr) ((volatile uint8_t *)(addr)) |
| 33 | |
Travis Geiselbrecht | 2c691e8 | 2008-09-04 02:41:01 -0700 | [diff] [blame] | 34 | #define RMWREG64(addr, startbit, width, val) *REG64(addr) = (*REG64(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) |
| 35 | #define RMWREG32(addr, startbit, width, val) *REG32(addr) = (*REG32(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) |
| 36 | #define RMWREG16(addr, startbit, width, val) *REG16(addr) = (*REG16(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) |
| 37 | #define RMWREG8(addr, startbit, width, val) *REG8(addr) = (*REG8(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) |
| 38 | |
Brian Swetland | 9c19412 | 2008-12-07 21:53:03 -0800 | [diff] [blame] | 39 | #define writel(v, a) (*REG32(a) = (v)) |
| 40 | #define readl(a) (*REG32(a)) |
| 41 | |
Subbaraman Narayanamurthy | f9b6e0d | 2010-09-08 16:51:43 -0700 | [diff] [blame] | 42 | #define writeb(v, a) (*REG8(a) = (v)) |
| 43 | #define readb(a) (*REG8(a)) |
Channagoud Kadabi | 4ba108f | 2013-03-18 11:59:28 -0700 | [diff] [blame] | 44 | |
| 45 | #define writehw(v, a) (*REG16(a) = (v)) |
| 46 | #define readhw(a) (*REG16(a)) |
Travis Geiselbrecht | 1d0df69 | 2008-09-01 02:26:09 -0700 | [diff] [blame] | 47 | #endif |