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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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