sh: Isolate uncached mapping support.

This splits out the uncached mapping support under its own config option,
presently only used by 29-bit mode and 32-bit + PMB. This will make it
possible to optionally add an uncached mapping on sh64 as well as booting
without an uncached mapping for 32-bit.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index b89075256b70..65cb5b83e072 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -75,6 +75,7 @@ config MEMORY_SIZE
 config 29BIT
         def_bool !32BIT
         depends on SUPERH32
+        select UNCACHED_MAPPING
 
 config 32BIT
         bool
@@ -84,6 +85,7 @@ config PMB
         bool "Support 32-bit physical addressing through PMB"
         depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
         select 32BIT
+        select UNCACHED_MAPPING
         help
           If you say Y here, physical addressing will be extended to
           32-bits through the SH-4A PMB. If this is not set, legacy
@@ -173,6 +175,9 @@ config IOREMAP_FIXED
        def_bool y
        depends on X2TLB || SUPERH64
 
+config UNCACHED_MAPPING
+        bool
+
 choice
         prompt "Kernel page size"
         default PAGE_SIZE_4KB