diff options
| author | cognet <cognet@FreeBSD.org> | 2007-08-18 16:47:28 +0000 |
|---|---|---|
| committer | cognet <cognet@FreeBSD.org> | 2007-08-18 16:47:28 +0000 |
| commit | fad9eb8cfef69bb3b592cc5aba729ceda82cae51 (patch) | |
| tree | 67fcbc96698061e856441440336b3523a67f9e32 /sys | |
| parent | 05d51a15e9cc000685a8ab21e013895361f68eaa (diff) | |
| download | FreeBSD-src-fad9eb8cfef69bb3b592cc5aba729ceda82cae51.zip FreeBSD-src-fad9eb8cfef69bb3b592cc5aba729ceda82cae51.tar.gz | |
Just wbinv if both PREREAD and PREWRITE are set.
In PREREAD, just invalidate the cache lines, and do not write back them, if
the buffer is properly aligned.
Approved by: re (blanket)
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arm/arm/busdma_machdep.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/arm/arm/busdma_machdep.c b/sys/arm/arm/busdma_machdep.c index 85f350f..2044e2a 100644 --- a/sys/arm/arm/busdma_machdep.c +++ b/sys/arm/arm/busdma_machdep.c @@ -1091,13 +1091,19 @@ bus_dmamap_sync_buf(void *buf, int len, bus_dmasync_op_t op) { char _tmp_cl[arm_dcache_align], _tmp_clend[arm_dcache_align]; - if (op & BUS_DMASYNC_PREWRITE) { + if ((op & BUS_DMASYNC_PREWRITE) && !(op & BUS_DMASYNC_PREREAD)) { cpu_dcache_wb_range((vm_offset_t)buf, len); cpu_l2cache_wb_range((vm_offset_t)buf, len); } if (op & BUS_DMASYNC_PREREAD) { - cpu_idcache_wbinv_range((vm_offset_t)buf, len); - cpu_l2cache_wbinv_range((vm_offset_t)buf, len); + if ((op & BUS_DMASYNC_PREWRITE) || + ((((vm_offset_t)(buf) | len) & arm_dcache_align_mask) == 0)) { + cpu_dcache_inv_range((vm_offset_t)buf, len); + cpu_l2cache_inv_range((vm_offset_t)buf, len); + } else { + cpu_dcache_wbinv_range((vm_offset_t)buf, len); + cpu_l2cache_wbinv_range((vm_offset_t)buf, len); + } } if (op & BUS_DMASYNC_POSTREAD) { if ((vm_offset_t)buf & arm_dcache_align_mask) { |
