diff options
Diffstat (limited to 'lib_blackfin')
| -rw-r--r-- | lib_blackfin/string.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/lib_blackfin/string.c b/lib_blackfin/string.c index 2a56910..36eecdf 100644 --- a/lib_blackfin/string.c +++ b/lib_blackfin/string.c @@ -175,19 +175,22 @@ void dma_memcpy_nocache(void *dst, const void *src, size_t count) bfin_write_MDMA_D0_CONFIG(0); bfin_write_MDMA_S0_CONFIG(0); } +/* We should do a dcache invalidate on the destination after the dma, but since + * we lack such hardware capability, we'll flush/invalidate the destination + * before the dma and bank on the idea that u-boot is single threaded. + */ void *dma_memcpy(void *dst, const void *src, size_t count) { - if (dcache_status()) + if (dcache_status()) { blackfin_dcache_flush_range(src, src + count); + blackfin_dcache_flush_invalidate_range(dst, dst + count); + } dma_memcpy_nocache(dst, src, count); if (icache_status()) blackfin_icache_flush_range(dst, dst + count); - if (dcache_status()) - blackfin_dcache_invalidate_range(dst, dst + count); - return dst; } |