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Travis Geiselbrecht1d0df692008-09-01 02:26:09 -07001/*
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 Geiselbrecht2c691e82008-09-04 02:41:01 -070034#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 Swetland9c194122008-12-07 21:53:03 -080039#define writel(v, a) (*REG32(a) = (v))
40#define readl(a) (*REG32(a))
41
Subbaraman Narayanamurthyf9b6e0d2010-09-08 16:51:43 -070042#define writeb(v, a) (*REG8(a) = (v))
43#define readb(a) (*REG8(a))
Travis Geiselbrecht1d0df692008-09-01 02:26:09 -070044#endif