Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jason Gunthorpe |
57 |
57.00% |
1 |
33.33% |
| Catalin Marinas |
41 |
41.00% |
1 |
33.33% |
| Thomas Gleixner |
2 |
2.00% |
1 |
33.33% |
| Total |
100 |
|
3 |
|
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on arch/arm/kernel/io.c
*
* Copyright (C) 2012 ARM Ltd.
*/
#include <linux/export.h>
#include <linux/types.h>
#include <linux/io.h>
/*
* This generates a memcpy that works on a from/to address which is aligned to
* bits. Count is in terms of the number of bits sized quantities to copy. It
* optimizes to use the STR groupings when possible so that it is WC friendly.
*/
#define memcpy_toio_aligned(to, from, count, bits) \
({ \
volatile u##bits __iomem *_to = to; \
const u##bits *_from = from; \
size_t _count = count; \
const u##bits *_end_from = _from + ALIGN_DOWN(_count, 8); \
\
for (; _from < _end_from; _from += 8, _to += 8) \
__const_memcpy_toio_aligned##bits(_to, _from, 8); \
if ((_count % 8) >= 4) { \
__const_memcpy_toio_aligned##bits(_to, _from, 4); \
_from += 4; \
_to += 4; \
} \
if ((_count % 4) >= 2) { \
__const_memcpy_toio_aligned##bits(_to, _from, 2); \
_from += 2; \
_to += 2; \
} \
if (_count % 2) \
__const_memcpy_toio_aligned##bits(_to, _from, 1); \
})
void __iowrite64_copy_full(void __iomem *to, const void *from, size_t count)
{
memcpy_toio_aligned(to, from, count, 64);
dgh();
}
EXPORT_SYMBOL(__iowrite64_copy_full);
void __iowrite32_copy_full(void __iomem *to, const void *from, size_t count)
{
memcpy_toio_aligned(to, from, count, 32);
dgh();
}
EXPORT_SYMBOL(__iowrite32_copy_full);