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| 2 | |
| 3 | * Copyright 2006 PathScale, Inc. All Rights Reserved.
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| 4 |
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| 5 |
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| 6 | #include <linux/export.h>
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| 7 | #include <linux/io.h>
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| 8 |
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| 9 | |
| 10 | * __iowrite32_copy - copy data to MMIO space, in 32-bit units
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| 11 | * @to: destination, in MMIO space (must be 32-bit aligned)
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| 12 | * @from: source (must be 32-bit aligned)
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| 13 | * @count: number of 32-bit quantities to copy
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| 14 | *
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| 15 | * Copy data from kernel space to MMIO space, in units of 32 bits at a
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| 16 | * time. Order of access is not guaranteed, nor is a memory barrier
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| 17 | * performed afterwards.
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| 18 |
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| 19 | #ifndef __iowrite32_copy
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| 20 | void __iowrite32_copy(void __iomem *to, const void *from, size_t count)
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| 21 | {
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| 22 | u32 __iomem *dst = to;
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| 23 | const u32 *src = from;
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| 24 | const u32 *end = src + count;
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| 25 |
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| 26 | while (src < end)
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| 27 | __raw_writel(*src++, dst++);
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| 28 | }
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| 29 | EXPORT_SYMBOL_GPL(__iowrite32_copy);
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| 30 | #endif
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| 31 |
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| 32 | |
| 33 | * __ioread32_copy - copy data from MMIO space, in 32-bit units
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| 34 | * @to: destination (must be 32-bit aligned)
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| 35 | * @from: source, in MMIO space (must be 32-bit aligned)
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| 36 | * @count: number of 32-bit quantities to copy
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| 37 | *
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| 38 | * Copy data from MMIO space to kernel space, in units of 32 bits at a
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| 39 | * time. Order of access is not guaranteed, nor is a memory barrier
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| 40 | * performed afterwards.
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| 41 |
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| 42 | void __ioread32_copy(void *to, const void __iomem *from, size_t count)
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| 43 | {
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| 44 | u32 *dst = to;
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| 45 | const u32 __iomem *src = from;
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| 46 | const u32 __iomem *end = src + count;
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| 47 |
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| 48 | while (src < end)
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| 49 | *dst++ = __raw_readl(src++);
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| 50 | }
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| 51 | EXPORT_SYMBOL_GPL(__ioread32_copy);
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| 52 |
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| 53 | |
| 54 | * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
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| 55 | * @to: destination, in MMIO space (must be 64-bit aligned)
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| 56 | * @from: source (must be 64-bit aligned)
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| 57 | * @count: number of 64-bit quantities to copy
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| 58 | *
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| 59 | * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
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| 60 | * time. Order of access is not guaranteed, nor is a memory barrier
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| 61 | * performed afterwards.
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| 62 |
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| 63 | #ifndef __iowrite64_copy
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| 64 | void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
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| 65 | {
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| 66 | #ifdef CONFIG_64BIT
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| 67 | u64 __iomem *dst = to;
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| 68 | const u64 *src = from;
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| 69 | const u64 *end = src + count;
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| 70 |
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| 71 | while (src < end)
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| 72 | __raw_writeq(*src++, dst++);
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| 73 | #else
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| 74 | __iowrite32_copy(to, from, count * 2);
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| 75 | #endif
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| 76 | }
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| 77 | EXPORT_SYMBOL_GPL(__iowrite64_copy);
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| 78 | #endif
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