mmio.h

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/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Originally imported from linux/include/asm-arm/io.h. This file has changed
 * substantially since then.
 */
 
#ifndef __ARCH_MMIO_H__
#define __ARCH_MMIO_H__
 
#include <arch/cache.h>
#include <endian.h>
#include <stdint.h>
 
static inline uint8_t read8(const void *addr)
{
        dmb();
        return *(volatile uint8_t *)__builtin_assume_aligned(addr, sizeof(uint8_t));
}
 
static inline uint16_t read16(const void *addr)
{
        dmb();
        return *(volatile uint16_t *)__builtin_assume_aligned(addr, sizeof(uint16_t));
}
 
static inline uint32_t read32(const void *addr)
{
        dmb();
        return *(volatile uint32_t *)__builtin_assume_aligned(addr, sizeof(uint32_t));
}
 
/* Not supported */
uint64_t read64(const void *addr);
 
static inline void write8(void *addr, uint8_t val)
{
        dmb();
        *(volatile uint8_t *)__builtin_assume_aligned(addr, sizeof(uint8_t)) = val;
        dmb();
}
 
static inline void write16(void *addr, uint16_t val)
{
        dmb();
        *(volatile uint16_t *)__builtin_assume_aligned(addr, sizeof(uint16_t)) = val;
        dmb();
}
 
static inline void write32(void *addr, uint32_t val)
{
        dmb();
        *(volatile uint32_t *)__builtin_assume_aligned(addr, sizeof(uint32_t)) = val;
        dmb();
}
 
/* Not supported */
void write64(void *addr, uint64_t val);
 
#endif /* __ARCH_MMIO_H__ */