/*
 * Copyright (c) 2008 Travis Geiselbrecht
 *
 * Use of this source code is governed by a MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT
 */
#pragma once

#include <stdint.h>

/* low level macros for accessing memory mapped hardware registers */
#define REG64(addr) ((volatile uint64_t *)(uintptr_t)(addr))
#define REG32(addr) ((volatile uint32_t *)(uintptr_t)(addr))
#define REG16(addr) ((volatile uint16_t *)(uintptr_t)(addr))
#define REG8(addr) ((volatile uint8_t *)(uintptr_t)(addr))

#define RMWREG64(addr, startbit, width, val) *REG64(addr) = (*REG64(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit))
#define RMWREG32(addr, startbit, width, val) *REG32(addr) = (*REG32(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit))
#define RMWREG16(addr, startbit, width, val) *REG16(addr) = (*REG16(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit))
#define RMWREG8(addr, startbit, width, val) *REG8(addr) = (*REG8(addr) & ~(((1<<(width)) - 1) << (startbit))) | ((val) << (startbit))

#define writel(v, a) (*REG32(a) = (v))
#define readl(a) (*REG32(a))
#define writeb(v, a) (*REG8(a) = (v))
#define readb(a) (*REG8(a))