diff options
| author |   Aubrey Li <aubrey.li@analog.com> | 2007-05-21 18:09:28 +0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-21 09:50:22 -0700 |
| commit | 5f9a3e899897201a49965cd9e1bb2570b3bde2b5 (patch) | |
| tree | 27616f6c6e49f2bafe2681441576e491bfbce0e1 /arch/blackfin/kernel | |
| parent | Blackfin arch: document why we have to touch the UART peripheral in our boot up code (diff) | |
| download | linux-dev-5f9a3e899897201a49965cd9e1bb2570b3bde2b5.tar.xz linux-dev-5f9a3e899897201a49965cd9e1bb2570b3bde2b5.zip | |
Blackfin arch: dma_memcpy borken for > 64K
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>
Diffstat (limited to 'arch/blackfin/kernel')
| -rw-r--r-- | arch/blackfin/kernel/bfin_dma_5xx.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 1c344acfd487..0ccb0dc3f833 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -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) |