MN10300: Cache: Split cache bits out of arch Kconfig
Split the cache bits out of arch/mn10300/Kconfig as they're quite complex.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/arch/mn10300/mm/Kconfig.cache b/arch/mn10300/mm/Kconfig.cache
new file mode 100644
index 0000000..f5599f4
--- /dev/null
+++ b/arch/mn10300/mm/Kconfig.cache
@@ -0,0 +1,32 @@
+#
+# MN10300 CPU cache options
+#
+
+choice
+ prompt "CPU Caching mode"
+ default MN10300_CACHE_WBACK
+ help
+ This option determines the caching mode for the kernel.
+
+ Write-Back caching mode involves the all reads and writes causing
+ the affected cacheline to be read into the cache first before being
+ operated upon. Memory is not then updated by a write until the cache
+ is filled and a cacheline needs to be displaced from the cache to
+ make room. Only at that point is it written back.
+
+ Write-Through caching only fetches cachelines from memory on a
+ read. Writes always get written directly to memory. If the affected
+ cacheline is also in cache, it will be updated too.
+
+ The final option is to turn of caching entirely.
+
+config MN10300_CACHE_WBACK
+ bool "Write-Back"
+
+config MN10300_CACHE_WTHRU
+ bool "Write-Through"
+
+config MN10300_CACHE_DISABLED
+ bool "Disabled"
+
+endchoice