MIPS: make cache operation mode configurable

Currently the cache operation mode is hard-coded to
CONF_CM_CACHABLE_NONCOHERENT. This is not appropiate for CPUs or SOCs
which operate at a different mode.

This patch makes the cache operation mode configurable via board config.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Acked-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>

diff --git a/arch/mips/cpu/mips32/start.S b/arch/mips/cpu/mips32/start.S
index e829b024c728fa4d4d3be7a973967b0ace846929..9c1b2f76d09bcff61c4d617da0795b7f35b9085c 100644 (file)
--- a/arch/mips/cpu/mips32/start.S
+++ b/arch/mips/cpu/mips32/start.S
@@ -27,6 +27,10 @@
 #include <asm/regdef.h>
 #include <asm/mipsregs.h>
 
+#ifndef CONFIG_SYS_MIPS_CACHE_MODE
+#define CONFIG_SYS_MIPS_CACHE_MODE CONF_CM_CACHABLE_NONCOHERENT
+#endif
+
        /*
         * For the moment disable interrupts, mark the kernel mode and
         * set ST0_KX so that the CPU does not spit fire when using
@@ -249,7 +253,7 @@ reset:
         nop
 
        /* ... and enable them */
-       li      t0, CONF_CM_CACHABLE_NONCOHERENT
+       li      t0, CONFIG_SYS_MIPS_CACHE_MODE
        mtc0    t0, CP0_CONFIG
 #endif