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