diff options
Diffstat (limited to 'arch/tile/lib/cacheflush.c')
| -rw-r--r-- | arch/tile/lib/cacheflush.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/tile/lib/cacheflush.c b/arch/tile/lib/cacheflush.c index 8f8ad81..2238b40 100644 --- a/arch/tile/lib/cacheflush.c +++ b/arch/tile/lib/cacheflush.c @@ -147,18 +147,21 @@ void finv_buffer_remote(void *buffer, size_t size, int hfh) force_load(p); /* - * Repeat, but with inv's instead of loads, to get rid of the + * Repeat, but with finv's instead of loads, to get rid of the * data we just loaded into our own cache and the old home L3. - * No need to unroll since inv's don't target a register. + * No need to unroll since finv's don't target a register. + * The finv's are guaranteed not to actually flush the data in + * the buffer back to their home, since we just read it, so the + * lines are clean in cache; we will only invalidate those lines. */ p = (char *)buffer + size - 1; - __insn_inv(p); + __insn_finv(p); p -= step_size; p = (char *)((unsigned long)p | (step_size - 1)); for (; p >= base; p -= step_size) - __insn_inv(p); + __insn_finv(p); - /* Wait for the load+inv's (and thus finvs) to have completed. */ + /* Wait for these finv's (and thus the first finvs) to be done. */ __insn_mf(); #ifdef __tilegx__ |