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, 9 insertions, 9 deletions

diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index ef6ab39eaf65..ab81c602295f 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -163,18 +163,18 @@ repeat:
         return 0;
 }
 
-int set_pmb_entry(struct pmb_entry *pmbe)
+int __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe)
 {
         int ret;
 
-        jump_to_P2();
+        jump_to_uncached();
         ret = __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, &pmbe->entry);
-        back_to_P1();
+        back_to_cached();
 
         return ret;
 }
 
-void clear_pmb_entry(struct pmb_entry *pmbe)
+void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
 {
         unsigned int entry = pmbe->entry;
         unsigned long addr;
@@ -188,7 +188,7 @@ void clear_pmb_entry(struct pmb_entry *pmbe)
                      entry >= NR_PMB_ENTRIES))
                 return;
 
-        jump_to_P2();
+        jump_to_uncached();
 
         /* Clear V-bit */
         addr = mk_pmb_addr(entry);
@@ -197,7 +197,7 @@ void clear_pmb_entry(struct pmb_entry *pmbe)
         addr = mk_pmb_data(entry);
         ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr);
 
-        back_to_P1();
+        back_to_cached();
 
         clear_bit(entry, &pmb_map);
 }
@@ -302,7 +302,7 @@ static void pmb_cache_ctor(struct kmem_cache *cachep, void *pmb)
         pmbe->entry = PMB_NO_ENTRY;
 }
 
-static int __init pmb_init(void)
+static int __uses_jump_to_uncached pmb_init(void)
 {
         unsigned int nr_entries = ARRAY_SIZE(pmb_init_map);
         unsigned int entry, i;
@@ -312,7 +312,7 @@ static int __init pmb_init(void)
         pmb_cache = kmem_cache_create("pmb", sizeof(struct pmb_entry), 0,
                                       SLAB_PANIC, pmb_cache_ctor);
 
-        jump_to_P2();
+        jump_to_uncached();
 
         /*
          * Ordering is important, P2 must be mapped in the PMB before we
@@ -335,7 +335,7 @@ static int __init pmb_init(void)
         i |= MMUCR_TI;
         ctrl_outl(i, MMUCR);
 
-        back_to_P1();
+        back_to_cached();
 
         return 0;
 }