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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/export.h>
#include <linux/io.h>
/**
* __ioread64_copy - copy data from MMIO space, in 64-bit units
* @to: destination (must be 64-bit aligned)
* @from: source, in MMIO space (must be 64-bit aligned)
* @count: number of 64-bit quantities to copy
*
* Copy data from MMIO space to kernel space, in units of 32 or 64 bits at a
* time. Order of access is not guaranteed, nor is a memory barrier
* performed afterwards.
*/
void __ioread64_copy(void *to, const void __iomem *from, size_t count)
{
#ifdef CONFIG_64BIT
u64 *dst = to;
const u64 __iomem *src = from;
const u64 __iomem *end = src + count;
while (src < end)
*dst++ = __raw_readq(src++);
#else
__ioread32_copy(to, from, count * 2);
#endif
}
EXPORT_SYMBOL_GPL(__ioread64_copy);
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