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| author | Paul Mundt <lethal@linux-sh.org> | 2007-07-31 17:07:28 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2007-09-21 11:57:46 +0900 |
| commit | e7bd34a15b85655f24d1b45edbe3bdfebf9d027e (patch) | |
| tree | 051647273266582fe95dcc5cf008534c264be5ae /arch/sh/mm/Kconfig | |
| parent | ac919986d7dfc5d1d9f5585521307f222a8ebeaf (diff) | |
| download | op-kernel-dev-e7bd34a15b85655f24d1b45edbe3bdfebf9d027e.zip op-kernel-dev-e7bd34a15b85655f24d1b45edbe3bdfebf9d027e.tar.gz | |
sh: Support explicit L1 cache disabling.
This reworks the cache mode configuration in Kconfig, and allows for
explicit selection of write-back/write-through/off configurations.
All of the cache flushing routines are optimized away for the off
case.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/Kconfig')
| -rw-r--r-- | arch/sh/mm/Kconfig | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 093d491..c277755 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -2,7 +2,6 @@ # Processor families # config CPU_SH2 - select SH_WRITETHROUGH if !CPU_SH2A bool config CPU_SH2A @@ -414,8 +413,17 @@ config SH_DIRECT_MAPPED Turn this option off for platforms that do not have a direct-mapped cache, and you have no need to run the caches in such a configuration. -config SH_WRITETHROUGH - bool "Use write-through caching" +choice + prompt "Cache mode" + default CACHE_WRITEBACK if CPU_SH2A || CPU_SH3 || CPU_SH4 + default CACHE_WRITETHROUGH if (CPU_SH2 && !CPU_SH2A) + +config CACHE_WRITEBACK + bool "Write-back" + depends on CPU_SH2A || CPU_SH3 || CPU_SH4 + +config CACHE_WRITETHROUGH + bool "Write-through" help Selecting this option will configure the caches in write-through mode, as opposed to the default write-back configuration. @@ -426,4 +434,9 @@ config SH_WRITETHROUGH If unsure, say N. +config CACHE_OFF + bool "Off" + +endchoice + endmenu |
