diff options
Diffstat (limited to 'arch/mn10300/mm/Kconfig.cache')
| -rw-r--r-- | arch/mn10300/mm/Kconfig.cache | 34 |
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. |