sh: Preparation for uncached jumps through PMB.
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>
diff --git a/arch/sh/mm/cache-debugfs.c b/arch/sh/mm/cache-debugfs.c
index de6d2c9..db6d950 100644
--- a/arch/sh/mm/cache-debugfs.c
+++ b/arch/sh/mm/cache-debugfs.c
@@ -22,7 +22,8 @@
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 @@
* 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 @@
addrstart += cache->way_incr;
}
- back_to_P1();
+ back_to_cached();
return 0;
}