MIPS: microMIPS: Add configuration option for microMIPS kernel.

This adds the option to build the Linux kernel using only the
microMIPS ISA. The resulting kernel binary is, at a minimum,
20% smaller than using the MIPS32R2 ISA.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 03de102b7a09..79bc56c78cdb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2041,6 +2041,13 @@ config CPU_HAS_SMARTMIPS
           you don't know you probably don't have SmartMIPS and should say N
           here.
 
+config CPU_MICROMIPS
+        depends on SYS_SUPPORTS_MICROMIPS
+        bool "Build kernel using microMIPS ISA"
+        help
+          When this option is enabled the kernel will be built using the
+          microMIPS ISA
+
 config CPU_HAS_WB
         bool