io-64-nonatomic-hi-lo.h 1.14 KB
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
#define _LINUX_IO_64_NONATOMIC_HI_LO_H_
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#include <linux/io.h>
#include <asm-generic/int-ll64.h>

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static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
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{
	const volatile u32 __iomem *p = addr;
	u32 low, high;

	high = readl(p + 1);
	low = readl(p);

	return low + ((u64)high << 32);
}

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static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
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{
	writel(val >> 32, addr + 4);
	writel(val, addr);
}
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static inline __u64 hi_lo_readq_relaxed(const volatile void __iomem *addr)
{
	const volatile u32 __iomem *p = addr;
	u32 low, high;

	high = readl_relaxed(p + 1);
	low = readl_relaxed(p);

	return low + ((u64)high << 32);
}

static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
{
	writel_relaxed(val >> 32, addr + 4);
	writel_relaxed(val, addr);
}

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#ifndef readq
#define readq hi_lo_readq
#endif

#ifndef writeq
#define writeq hi_lo_writeq
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#endif

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#ifndef readq_relaxed
#define readq_relaxed hi_lo_readq_relaxed
#endif

#ifndef writeq_relaxed
#define writeq_relaxed hi_lo_writeq_relaxed
#endif

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#endif	/* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */