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-rw-r--r--cpu/ppc4xx/start.S9
1 files changed, 8 insertions, 1 deletions
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 948de43..647088f 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -1198,12 +1198,19 @@ ppcSync:
.globl relocate_code
relocate_code:
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
- dccci 0,0 /* Invalidate data cache, now no longer our stack */
+ /*
+ * On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
+ * to speed up the boot process. Now this cache needs to be disabled.
+ */
+ iccci 0,0 /* Invalidate inst cache */
+ dccci 0,0 /* Invalidate data cache, now no longer our stack */
sync
+ isync
addi r1,r0,0x0000 /* TLB entry #0 */
tlbre r0,r1,0x0002 /* Read contents */
ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
tlbwe r0,r1,0x0002 /* Save it out */
+ sync
isync
#endif
mr r1, r3 /* Set new stack pointer */