Signed-off-by: Daniel Schwierzeck <daniel.schwierz...@googlemail.com>
---
Changes for v2:
- updated patch subject
- removed CPU specific #ifdefs
- added description for config option CONFIG_SYS_MIPS_CACHE_EXT_INIT
to README
README | 5 +++++
arch/mips/cpu/mips32/cache.S | 10 ++++++++++
arch/mips/include/asm/mipsregs.h | 9 ++++++++-
3 files changed, 23 insertions(+), 1 deletions(-)
diff --git a/README b/README
index 07f1d11..834dd45 100644
--- a/README
+++ b/README
@@ -409,6 +409,11 @@ The following options need to be configured:
CONF_CM_CACHABLE_CUW
CONF_CM_CACHABLE_ACCELERATED
+ CONFIG_SYS_MIPS_CACHE_EXT_INIT
+
+ Enable this to use extended cache initialization for recent
+ MIPS CPU cores.
+
CONFIG_SYS_XWAY_EBU_BOOTCFG
Special option for Lantiq XWAY SoCs for booting from NOR flash.
diff --git a/arch/mips/cpu/mips32/cache.S b/arch/mips/cpu/mips32/cache.S
index e683e8b..316e961 100644
--- a/arch/mips/cpu/mips32/cache.S
+++ b/arch/mips/cpu/mips32/cache.S
@@ -81,7 +81,12 @@
*/
LEAF(mips_init_icache)
blez a1, 9f
+#ifdef CONFIG_SYS_MIPS_CACHE_EXT_INIT
+ mtc0 zero, CP0_ITAGLO
+ mtc0 zero, CP0_IDATALO
+#else
mtc0 zero, CP0_TAGLO
+#endif
/* clear tag to invalidate */
PTR_LI t0, INDEX_BASE
PTR_ADDU t1, t0, a1
@@ -106,7 +111,12 @@ LEAF(mips_init_icache)
*/
LEAF(mips_init_dcache)
blez a1, 9f
+#ifdef CONFIG_SYS_MIPS_CACHE_EXT_INIT
+ mtc0 zero, CP0_DTAGLO
+ mtc0 zero, CP0_DDATALO
+#else
mtc0 zero, CP0_TAGLO
+#endif
/* clear all tags */
PTR_LI t0, INDEX_BASE
PTR_ADDU t1, t0, a1
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 15a9fd5..07a3cf6 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -93,7 +93,14 @@
* These registers are listed for completeness and are intended
* for usage in assembly code.
*/
-#define CP0_EBASE $15,1
+#define CP0_EBASE $15,1
+/* L1 I-Cache */
+#define CP0_ITAGLO $28
+#define CP0_IDATALO $28,1
+#define CP0_IDATAHI $29,1
+/* L1 D-Cache */
+#define CP0_DTAGLO $28,2
+#define CP0_DDATALO $28,3
/*
* Coprocessor 0 Set 1 register names
--
1.7.7.2
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
