lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sh: Preparation for uncached jumps through PMB.

Browse Source 
Presently most of the 29-bit physical parts do P1/P2 segmentation
with a 1:1 cached/uncached mapping, jumping between the two to
control the caching behaviour. This provides the basic infrastructure
to maintain this behaviour on 32-bit physical parts that don't map
P1/P2 at all, using a shiny new linker section and corresponding
fixmap entry.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Stuart Menefy
2007-11-30 17:06:36 +09:00
committed by Paul Mundt
parent 325df7f204
commit cbaa118ecf
14 changed files with 88 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
arch/sh/mm/cache-debugfs.c
View File

@@ -22,7 +22,8 @@ enum cache_type {
CACHE_TYPE_UNIFIED,
};
static int cache_seq_show(struct seq_file *file, void *iter)
static int __uses_jump_to_uncached cache_seq_show(struct seq_file *file,
void *iter)
{
unsigned int cache_type = (unsigned int)file->private;
struct cache_info *cache;
@@ -34,11 +35,11 @@ static int cache_seq_show(struct seq_file *file, void *iter)
* Go uncached immediately so we don't skew the results any
* more than we already are..
*/
jump_to_P2();
jump_to_uncached();
ccr = ctrl_inl(CCR);
if ((ccr & CCR_CACHE_ENABLE) == 0) {
back_to_P1();
back_to_cached();
seq_printf(file, "disabled\n");
return 0;
@@ -104,7 +105,7 @@ static int cache_seq_show(struct seq_file *file, void *iter)
addrstart += cache->way_incr;
}
back_to_P1();
back_to_cached();
return 0;
}