sh: Definitions for 3-level page table layout

[firefly-linux-kernel-4.4.55.git] / arch / sh / mm / Kconfig

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 0e7ba8e891cfb529dd2cc2c7c20458fa15ceb093..b3f6c1a30b2270635a18ad85cd7d721abde4eb1d 100644 (file)
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -189,6 +189,24 @@ config ARCH_MEMORY_PROBE
        def_bool y
        depends on MEMORY_HOTPLUG
 
+choice
+       prompt "Page table layout"
+       default PGTABLE_LEVELS_3 if X2TLB
+       default PGTABLE_LEVELS_2
+
+config PGTABLE_LEVELS_2
+       bool "2 Levels"
+       help
+         This is the default page table layout for all SuperH CPUs.
+
+config PGTABLE_LEVELS_3
+       bool "3 Levels"
+       depends on X2TLB
+       help
+         This enables a 3 level page table structure.
+
+endchoice
+
 choice
        prompt "Kernel page size"
        default PAGE_SIZE_8KB if X2TLB
@@ -196,13 +214,13 @@ choice
 
 config PAGE_SIZE_4KB
        bool "4kB"
-       depends on !MMU || !X2TLB
+       depends on !MMU || !X2TLB || PGTABLE_LEVELS_3
        help
          This is the default page size used by all SuperH CPUs.
 
 config PAGE_SIZE_8KB
        bool "8kB"
-       depends on !MMU || X2TLB
+       depends on !MMU || X2TLB && !PGTABLE_LEVELS_3
        help
          This enables 8kB pages as supported by SH-X2 and later MMUs.
 
@@ -214,7 +232,7 @@ config PAGE_SIZE_16KB
 
 config PAGE_SIZE_64KB
        bool "64kB"
-       depends on !MMU || CPU_SH4 || CPU_SH5
+       depends on !MMU || CPU_SH4 && !PGTABLE_LEVELS_3 || CPU_SH5
        help
          This enables support for 64kB pages, possible on all SH-4
          CPUs and later.