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Diffstat (limited to 'arch/xtensa/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index d575e8701955..524b80722fd0 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -249,6 +249,23 @@ config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX If in doubt, say Y. +config MEMMAP_CACHEATTR + hex "Cache attributes for the memory address space" + depends on !MMU + default 0x22222222 + help + These cache attributes are set up for noMMU systems. Each hex digit + specifies cache attributes for the corresponding 512MB memory + region: bits 0..3 -- for addresses 0x00000000..0x1fffffff, + bits 4..7 -- for addresses 0x20000000..0x3fffffff, and so on. + + Cache attribute values are specific for the MMU type, so e.g. + for region protection MMUs: 2 is cache bypass, 4 is WB cached, + 1 is WT cached, f is illegal. For ful MMU: bit 0 makes it executable, + bit 1 makes it writable, bits 2..3 meaning is 0: cache bypass, + 1: WB cache, 2: WT cache, 3: special (c and e are illegal, f is + reserved). + config KSEG_PADDR hex "Physical address of the KSEG mapping" depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX && MMU |