sh: uncached mapping helpers.

This adds some helper routines for uncached mapping support. This
simplifies some of the cases where we need to check the uncached mapping
boundaries in addition to giving us a centralized location for building
more complex manipulation on top of.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index 91ae76277d8f..79ff39517f8e 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -152,6 +152,7 @@ ENTRY(_stext)
 
         mov     #0, r10
 
+#ifdef CONFIG_UNCACHED_MAPPING
         /*
          * Uncached mapping
          */
@@ -171,6 +172,7 @@ ENTRY(_stext)
         add     r4, r1
         add     r4, r3
         add     #1, r10
+#endif
 
 /*
  * Iterate over all of the available sizes from largest to
@@ -216,6 +218,7 @@ ENTRY(_stext)
         __PMB_ITER_BY_SIZE(64)
         __PMB_ITER_BY_SIZE(16)
 
+#ifdef CONFIG_UNCACHED_MAPPING
         /*
          * Now that we can access it, update cached_to_uncached and
          * uncached_size.
@@ -228,6 +231,7 @@ ENTRY(_stext)
         shll16  r7
         shll8   r7
         mov.l   r7, @r0
+#endif
 
         /*
          * Clear the remaining PMB entries.
@@ -306,7 +310,9 @@ ENTRY(stack_start)
 .LFIRST_ADDR_ENTRY:     .long   PAGE_OFFSET | PMB_V
 .LFIRST_DATA_ENTRY:     .long   __MEMORY_START | PMB_V
 .LMMUCR:                .long   MMUCR
+.LMEMORY_SIZE:          .long   __MEMORY_SIZE
+#ifdef CONFIG_UNCACHED_MAPPING
 .Lcached_to_uncached:   .long   cached_to_uncached
 .Luncached_size:        .long   uncached_size
-.LMEMORY_SIZE:          .long   __MEMORY_SIZE
+#endif
 #endif