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>
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index 91ae762..79ff395 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -152,6 +152,7 @@
mov #0, r10
+#ifdef CONFIG_UNCACHED_MAPPING
/*
* Uncached mapping
*/
@@ -171,6 +172,7 @@
add r4, r1
add r4, r3
add #1, r10
+#endif
/*
* Iterate over all of the available sizes from largest to
@@ -216,6 +218,7 @@
__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 @@
shll16 r7
shll8 r7
mov.l r7, @r0
+#endif
/*
* Clear the remaining PMB entries.
@@ -306,7 +310,9 @@
.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