// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2006 PathScale , Inc . All Rights Reserved .
*/
#include <linux/export.h>
#include <linux/io.h>
/**
* _ _ iowrite32_copy - copy data to MMIO space , in 32 - bit units
* @ to : destination , in MMIO space ( must be 32 - bit aligned )
* @ from : source ( must be 32 - bit aligned )
* @ count : number of 32 - bit quantities to copy
*
* Copy data from kernel space to MMIO space , in units of 32 bits at a
* time . Order of access is not guaranteed , nor is a memory barrier
* performed afterwards .
*/
#ifndef __iowrite32_copy
void __iowrite32_copy(void __iomem *to, const void *from, size_t count)
{
u32 __iomem *dst = to;
const u32 *src = from;
const u32 *end = src + count;
while (src < end)
__raw_writel(*src++, dst++);
}
EXPORT_SYMBOL_GPL(__iowrite32_copy);
#endif
/**
* _ _ ioread32_copy - copy data from MMIO space , in 32 - bit units
* @ to : destination ( must be 32 - bit aligned )
* @ from : source , in MMIO space ( must be 32 - bit aligned )
* @ count : number of 32 - bit quantities to copy
*
* Copy data from MMIO space to kernel space , in units of 32 bits at a
* time . Order of access is not guaranteed , nor is a memory barrier
* performed afterwards .
*/
void __ioread32_copy(void *to, const void __iomem *from, size_t count)
{
u32 *dst = to;
const u32 __iomem *src = from;
const u32 __iomem *end = src + count;
while (src < end)
*dst++ = __raw_readl(src++);
}
EXPORT_SYMBOL_GPL(__ioread32_copy);
/**
* _ _ iowrite64_copy - copy data to MMIO space , in 64 - bit or 32 - bit units
* @ to : destination , in MMIO space ( must be 64 - bit aligned )
* @ from : source ( must be 64 - bit aligned )
* @ count : number of 64 - bit quantities to copy
*
* Copy data from kernel space to MMIO space , in units of 32 or 64 bits at a
* time . Order of access is not guaranteed , nor is a memory barrier
* performed afterwards .
*/
#ifndef __iowrite64_copy
void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
{
#ifdef CONFIG_64BIT
u64 __iomem *dst = to;
const u64 *src = from;
const u64 *end = src + count;
while (src < end)
__raw_writeq(*src++, dst++);
#else
__iowrite32_copy(to, from, count * 2 );
#endif
}
EXPORT_SYMBOL_GPL(__iowrite64_copy);
#endif
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