lib/arm64/asm/io.h

#ifndef _ASMARM64_IO_H_
#define _ASMARM64_IO_H_
/*
 * From Linux arch/arm64/include/asm/io.h
 * Generic IO read/write.  These perform native-endian accesses.
 *
 * Copyright (C) 2017, Red Hat Inc, Andrew Jones <drjones@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.
 */
#include <libcflat.h>
#include <asm/barrier.h>
#include <asm/page.h>

#define __iomem
#define __force

#define __raw_writeb __raw_writeb
static inline void __raw_writeb(u8 val, volatile void __iomem *addr)
{
	asm volatile("strb %w0, [%1]" : : "r" (val), "r" (addr));
}

#define __raw_writew __raw_writew
static inline void __raw_writew(u16 val, volatile void __iomem *addr)
{
	asm volatile("strh %w0, [%1]" : : "r" (val), "r" (addr));
}

#define __raw_writel __raw_writel
static inline void __raw_writel(u32 val, volatile void __iomem *addr)
{
	asm volatile("str %w0, [%1]" : : "r" (val), "r" (addr));
}

#define __raw_writeq __raw_writeq
static inline void __raw_writeq(u64 val, volatile void __iomem *addr)
{
	asm volatile("str %0, [%1]" : : "r" (val), "r" (addr));
}

#define __raw_readb __raw_readb
static inline u8 __raw_readb(const volatile void __iomem *addr)
{
	u8 val;
	asm volatile("ldrb %w0, [%1]" : "=r" (val) : "r" (addr));
	return val;
}

#define __raw_readw __raw_readw
static inline u16 __raw_readw(const volatile void __iomem *addr)
{
	u16 val;
	asm volatile("ldrh %w0, [%1]" : "=r" (val) : "r" (addr));
	return val;
}

#define __raw_readl __raw_readl
static inline u32 __raw_readl(const volatile void __iomem *addr)
{
	u32 val;
	asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr));
	return val;
}

#define __raw_readq __raw_readq
static inline u64 __raw_readq(const volatile void __iomem *addr)
{
	u64 val;
	asm volatile("ldr %0, [%1]" : "=r" (val) : "r" (addr));
	return val;
}

#define virt_to_phys virt_to_phys
static inline phys_addr_t virt_to_phys(const volatile void *x)
{
	return __virt_to_phys((unsigned long)(x));
}

#define phys_to_virt phys_to_virt
static inline void *phys_to_virt(phys_addr_t x)
{
	return (void *)__phys_to_virt(x);
}

#include <asm-generic/io.h>

#endif /* _ASMARM64_IO_H_ */