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>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/sh/mm/cache-debugfs.c b/arch/sh/mm/cache-debugfs.c
index de6d2c9aa477..db6d950b6f5e 100644
--- a/arch/sh/mm/cache-debugfs.c
+++ b/arch/sh/mm/cache-debugfs.c
@@ -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;
 }