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-rw-r--r--arch/mn10300/mm/Kconfig.cache34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/mn10300/mm/Kconfig.cache b/arch/mn10300/mm/Kconfig.cache
index 97adc06e7128..653254a34f88 100644
--- a/arch/mn10300/mm/Kconfig.cache
+++ b/arch/mn10300/mm/Kconfig.cache
@@ -22,12 +22,26 @@ choice
config MN10300_CACHE_WBACK
bool "Write-Back"
+ help
+ The dcache operates in delayed write-back mode. It must be manually
+ flushed if writes are made that subsequently need to be executed or
+ to be DMA'd by a device.
config MN10300_CACHE_WTHRU
bool "Write-Through"
+ help
+ The dcache operates in immediate write-through mode. Writes are
+ committed to RAM immediately in addition to being stored in the
+ cache. This means that the written data is immediately available for
+ execution or DMA.
+
+ This is not available for use with an SMP kernel if cache flushing
+ and invalidation by automatic purge register is not selected.
config MN10300_CACHE_DISABLED
bool "Disabled"
+ help
+ The icache and dcache are disabled.
endchoice
@@ -64,3 +78,23 @@ config MN10300_CACHE_FLUSH_BY_TAG
config MN10300_CACHE_FLUSH_BY_REG
def_bool y if MN10300_CACHE_MANAGE_BY_REG && MN10300_CACHE_WBACK
+
+
+config MN10300_HAS_CACHE_SNOOP
+ def_bool n
+
+config MN10300_CACHE_SNOOP
+ bool "Use CPU Cache Snooping"
+ depends on MN10300_CACHE_ENABLED && MN10300_HAS_CACHE_SNOOP
+ default y
+
+config MN10300_CACHE_FLUSH_ICACHE
+ def_bool y if MN10300_CACHE_WBACK && !MN10300_CACHE_SNOOP
+ help
+ Set if we need the dcache flushing before the icache is invalidated.
+
+config MN10300_CACHE_INV_ICACHE
+ def_bool y if MN10300_CACHE_WTHRU && !MN10300_CACHE_SNOOP
+ help
+ Set if we need the icache to be invalidated, even if the dcache is in
+ write-through mode and doesn't need flushing.