# # 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 config MN10300_CACHE_ENABLED def_bool y if !MN10300_CACHE_DISABLED