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51 lines
935 B
51 lines
935 B
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <asm/io.h> |
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/* |
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* Copy data from IO memory space to "real" memory space. |
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* This needs to be optimized. |
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*/ |
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void memcpy_fromio(void *to, const volatile void __iomem *from, long count) |
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{ |
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char *dst = to; |
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while (count) { |
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count--; |
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*dst++ = readb(from++); |
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} |
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} |
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EXPORT_SYMBOL(memcpy_fromio); |
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/* |
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* Copy data from "real" memory space to IO memory space. |
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* This needs to be optimized. |
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*/ |
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void memcpy_toio(volatile void __iomem *to, const void *from, long count) |
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{ |
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const char *src = from; |
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while (count) { |
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count--; |
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writeb(*src++, to++); |
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} |
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} |
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EXPORT_SYMBOL(memcpy_toio); |
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/* |
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* "memset" on IO memory space. |
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* This needs to be optimized. |
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*/ |
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void memset_io(volatile void __iomem *dst, int c, long count) |
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{ |
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unsigned char ch = (char)(c & 0xff); |
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while (count) { |
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count--; |
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writeb(ch, dst); |
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dst++; |
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} |
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} |
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EXPORT_SYMBOL(memset_io);
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