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, 4 insertions, 3 deletions

diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c
index 2d1dd6044307..f0c7b7397fa6 100644
--- a/arch/sh/mm/tlb-sh4.c
+++ b/arch/sh/mm/tlb-sh4.c
@@ -79,7 +79,8 @@ void update_mmu_cache(struct vm_area_struct * vma,
         local_irq_restore(flags);
 }
 
-void local_flush_tlb_one(unsigned long asid, unsigned long page)
+void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid,
+                                                 unsigned long page)
 {
         unsigned long addr, data;
 
@@ -91,7 +92,7 @@ void local_flush_tlb_one(unsigned long asid, unsigned long page)
          */
         addr = MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT;
         data = page | asid; /* VALID bit is off */
-        jump_to_P2();
+        jump_to_uncached();
         ctrl_outl(data, addr);
-        back_to_P1();
+        back_to_cached();
 }