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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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05933aac7b
With the SGI SN2 machvec removal most of the indirections are unused now, so remove them. This includes the entire removal of the mmio read*/write* macros as the generic ones are identical to the asm-generic/io.h version. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lkml.kernel.org/r/20190813072514.23299-17-hch@lst.de Signed-off-by: Tony Luck <tony.luck@intel.com>
52 lines
935 B
C
52 lines
935 B
C
// 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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