aboutsummaryrefslogtreecommitdiff
path: root/arch/mn10300/mm
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2010-10-27 17:28:41 +0100
committerDavid Howells <dhowells@redhat.com>2010-10-27 17:28:41 +0100
commit0bc42d7fcb0acaab4202db97ff2de475424bf9b4 (patch)
tree4ca3bbe604cda0f578de150b90aa4032ad22943d /arch/mn10300/mm
parent86c0f935c1eee1d778b43895f80c9d27a896dfd9 (diff)
downloadlinux-0bc42d7fcb0acaab4202db97ff2de475424bf9b4.tar.gz
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>
Diffstat (limited to 'arch/mn10300/mm')
-rw-r--r--arch/mn10300/mm/Kconfig.cache32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/mn10300/mm/Kconfig.cache b/arch/mn10300/mm/Kconfig.cache
new file mode 100644
index 00000000000..f5599f47ec1
--- /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