From 0bc42d7fcb0acaab4202db97ff2de475424bf9b4 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 27 Oct 2010 17:28:41 +0100 Subject: 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 --- arch/mn10300/mm/Kconfig.cache | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 arch/mn10300/mm/Kconfig.cache (limited to 'arch/mn10300/mm') diff --git a/arch/mn10300/mm/Kconfig.cache b/arch/mn10300/mm/Kconfig.cache new file mode 100644 index 000000000000..f5599f47ec15 --- /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 -- cgit