1// Copyright 2016 The Fuchsia Authors 2// Copyright (c) 2008 Travis Geiselbrecht 3// 4// Use of this source code is governed by a MIT-style 5// license that can be found in the LICENSE file or at 6// https://opensource.org/licenses/MIT 7 8#pragma once 9 10#include <stdint.h> 11 12/* low level macros for accessing memory mapped hardware registers */ 13#define REG64(addr) ((volatile uint64_t *)(uintptr_t)(addr)) 14#define REG32(addr) ((volatile uint32_t *)(uintptr_t)(addr)) 15#define REG16(addr) ((volatile uint16_t *)(uintptr_t)(addr)) 16#define REG8(addr) ((volatile uint8_t *)(uintptr_t)(addr)) 17 18#define RMWREG64(addr, startbit, width, val) *REG64(addr) = (*REG64(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) 19#define RMWREG32(addr, startbit, width, val) *REG32(addr) = (*REG32(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) 20#define RMWREG16(addr, startbit, width, val) *REG16(addr) = (*REG16(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) 21#define RMWREG8(addr, startbit, width, val) *REG8(addr) = (*REG8(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit)) 22 23#define writell(v, a) (*REG64(a) = (v)) 24#define readll(a) (*REG64(a)) 25#define writel(v, a) (*REG32(a) = (v)) 26#define readl(a) (*REG32(a)) 27#define writew(v, a) (*REG16(a) = (v)) 28#define readw(a) (*REG16(a)) 29#define writeb(v, a) (*REG8(a) = (v)) 30#define readb(a) (*REG8(a)) 31