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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_CSKY_IO_H
#define __ASM_CSKY_IO_H
#include <linux/pgtable.h>
#include <linux/types.h>
/*
* I/O memory access primitives. Reads are ordered relative to any
* following Normal memory access. Writes are ordered relative to any prior
* Normal memory access.
*
* For CACHEV1 (807, 810), store instruction could fast retire, so we need
* another mb() to prevent st fast retire.
*
* For CACHEV2 (860), store instruction with PAGE_ATTR_NO_BUFFERABLE won't
* fast retire.
*/
#define readb(c) ({ u8 __v = readb_relaxed(c); rmb(); __v; })
#define readw(c) ({ u16 __v = readw_relaxed(c); rmb(); __v; })
#define readl(c) ({ u32 __v = readl_relaxed(c); rmb(); __v; })
#ifdef CONFIG_CPU_HAS_CACHEV2
#define writeb(v,c) ({ wmb(); writeb_relaxed((v),(c)); })
#define writew(v,c) ({ wmb(); writew_relaxed((v),(c)); })
#define writel(v,c) ({ wmb(); writel_relaxed((v),(c)); })
#else
#define writeb(v,c) ({ wmb(); writeb_relaxed((v),(c)); mb(); })
#define writew(v,c) ({ wmb(); writew_relaxed((v),(c)); mb(); })
#define writel(v,c) ({ wmb(); writel_relaxed((v),(c)); mb(); })
#endif
/*
* String version of I/O memory access operations.
*/
extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);
extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);
extern void __memset_io(volatile void __iomem *, int, size_t);
#define memset_io(c,v,l) __memset_io((c),(v),(l))
#define memcpy_fromio(a,c,l) __memcpy_fromio((a),(c),(l))
#define memcpy_toio(c,a,l) __memcpy_toio((c),(a),(l))
/*
* I/O memory mapping functions.
*/
#define ioremap_wc(addr, size) \
ioremap_prot((addr), (size), \
(_PAGE_IOREMAP & ~_CACHE_MASK) | _CACHE_UNCACHED)
#include <asm-generic/io.h>
#endif /* __ASM_CSKY_IO_H */
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