xref: /kvm-unit-tests/lib/riscv/asm/io.h (revision bd744d46591007f4dbb2ec1b9e05a55a145c8684)

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * From Linux arch/riscv/include/asm/mmio.h
 */
#ifndef _ASMRISCV_IO_H_
#define _ASMRISCV_IO_H_
#include <libcflat.h>

#define __iomem

/* Generic IO read/write.  These perform native-endian accesses. */
#define __raw_writeb __raw_writeb
static inline void __raw_writeb(u8 val, volatile void __iomem *addr)
{
	asm volatile("sb %0, 0(%1)" : : "r" (val), "r" (addr));
}

#define __raw_writew __raw_writew
static inline void __raw_writew(u16 val, volatile void __iomem *addr)
{
	asm volatile("sh %0, 0(%1)" : : "r" (val), "r" (addr));
}

#define __raw_writel __raw_writel
static inline void __raw_writel(u32 val, volatile void __iomem *addr)
{
	asm volatile("sw %0, 0(%1)" : : "r" (val), "r" (addr));
}

#ifdef CONFIG_64BIT
#define __raw_writeq __raw_writeq
static inline void __raw_writeq(u64 val, volatile void __iomem *addr)
{
	asm volatile("sd %0, 0(%1)" : : "r" (val), "r" (addr));
}
#endif

#define __raw_readb __raw_readb
static inline u8 __raw_readb(const volatile void __iomem *addr)
{
	u8 val;

	asm volatile("lb %0, 0(%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("lh %0, 0(%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("lw %0, 0(%1)" : "=r" (val) : "r" (addr));
	return val;
}

#ifdef CONFIG_64BIT
#define __raw_readq __raw_readq
static inline u64 __raw_readq(const volatile void __iomem *addr)
{
	u64 val;

	asm volatile("ld %0, 0(%1)" : "=r" (val) : "r" (addr));
	return val;
}
#endif

#include <asm-generic/io.h>

#endif /* _ASMRISCV_IO_H_ */