MIPS: Kconfig: Add Kconfig symbols for EVA support

Add basic Kconfig support for EVA. Not selectable by any platform
at this point.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 50d854ce7f5997b84e2d52184ac32f294699979c..731446473f213c83f943d1def3c48b295bda34e8 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1455,6 +1455,26 @@ config CPU_XLP
          Netlogic Microsystems XLP processors.
 endchoice
 
+config CPU_MIPS32_3_5_FEATURES
+       bool "MIPS32 Release 3.5 Features"
+       depends on SYS_HAS_CPU_MIPS32_R3_5
+       depends on CPU_MIPS32_R2
+       help
+         Choose this option to build a kernel for release 2 or later of the
+         MIPS32 architecture including features from the 3.5 release such as
+         support for Enhanced Virtual Addressing (EVA).
+
+config CPU_MIPS32_3_5_EVA
+       bool "Enhanced Virtual Addressing (EVA)"
+       depends on CPU_MIPS32_3_5_FEATURES
+       select EVA
+       default y
+       help
+         Choose this option if you want to enable the Enhanced Virtual
+         Addressing (EVA) on your MIPS32 core (such as proAptiv).
+         One of its primary benefits is an increase in the maximum size
+         of lowmem (up to 3GB). If unsure, say 'N' here.
+
 if CPU_LOONGSON2F
 config CPU_NOP_WORKAROUNDS
        bool
@@ -1548,6 +1568,9 @@ config SYS_HAS_CPU_MIPS32_R1
 config SYS_HAS_CPU_MIPS32_R2
        bool
 
+config SYS_HAS_CPU_MIPS32_R3_5
+       bool
+
 config SYS_HAS_CPU_MIPS64_R1
        bool
 
@@ -1664,6 +1687,9 @@ config CPU_MIPSR2
        bool
        default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
 
+config EVA
+       bool
+
 config SYS_SUPPORTS_32BIT_KERNEL
        bool
 config SYS_SUPPORTS_64BIT_KERNEL
@@ -2149,7 +2175,7 @@ config CPU_R4400_WORKAROUNDS
 #
 config HIGHMEM
        bool "High Memory Support"
-       depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
+       depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA
 
 config CPU_SUPPORTS_HIGHMEM
        bool