redonkable/alistair23-linux
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Blackfin arch: dma_memcpy borken for > 64K

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Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aubrey Li 2007-05-21 18:09:28 +08:00 committed by Linus Torvalds
parent 5079df993c
commit 5f9a3e8998
1 changed files with 16 additions and 1 deletions
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17
arch/blackfin/kernel/bfin_dma_5xx.c
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@ -595,7 +595,7 @@ unsigned short get_dma_curr_ycount(unsigned int channel)
}
EXPORT_SYMBOL(get_dma_curr_ycount);
void *dma_memcpy(void *dest, const void *src, size_t size)
void *_dma_memcpy(void *dest, const void *src, size_t size)
{
int direction; /* 1 - address decrease, 0 - address increase */
int flag_align; /* 1 - address aligned, 0 - address unaligned */
@ -734,6 +734,21 @@ void *dma_memcpy(void *dest, const void *src, size_t size)
return dest;
}
void *dma_memcpy(void *dest, const void *src, size_t size)
{
size_t bulk;
size_t rest;
void * addr;
bulk = (size >> 16) << 16;
rest = size - bulk;
if (bulk)
_dma_memcpy(dest, src, bulk);
addr = _dma_memcpy(dest+bulk, src+bulk, rest);
return addr;
}
EXPORT_SYMBOL(dma_memcpy);
void *safe_dma_memcpy(void *dest, const void *src, size_t size)