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-rw-r--r--cpu/ppc4xx/commproc.c14
-rw-r--r--cpu/ppc4xx/start.S52
2 files changed, 65 insertions, 1 deletions
diff --git a/cpu/ppc4xx/commproc.c b/cpu/ppc4xx/commproc.c
index 68aab5b..22156dd 100644
--- a/cpu/ppc4xx/commproc.c
+++ b/cpu/ppc4xx/commproc.c
@@ -26,10 +26,21 @@
#include <common.h>
#include <commproc.h>
-
+#include <asm/io.h>
#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
+#if defined(CFG_POST_ALT_WORD_ADDR)
+void post_word_store (ulong a)
+{
+ out_be32((void *)CFG_POST_ALT_WORD_ADDR, a);
+}
+
+ulong post_word_load (void)
+{
+ return in_be32((void *)CFG_POST_ALT_WORD_ADDR);
+}
+#else /* CFG_POST_ALT_WORD_ADDR */
void post_word_store (ulong a)
{
volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR + CFG_POST_WORD_ADDR);
@@ -41,6 +52,7 @@ ulong post_word_load (void)
volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR + CFG_POST_WORD_ADDR);
return *(volatile ulong *) save_addr;
}
+#endif /* CFG_POST_ALT_WORD_ADDR */
#endif /* CONFIG_POST || CONFIG_LOGBUFFER*/
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 52601ed..a730604 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -636,6 +636,33 @@ _start:
dcbz r0,r3
addi r3,r3,32
bdnz ..d_ag
+
+ /*
+ * Lock the init-ram/stack in d-cache, so that other regions
+ * may use d-cache as well
+ * Note, that this current implementation locks exactly 4k
+ * of d-cache, so please make sure that you don't define a
+ * bigger init-ram area. Take a look at the lwmon5 440EPx
+ * implementation as a reference.
+ */
+ msync
+ isync
+ /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
+ lis r1,0x0201
+ ori r1,r1,0xf808
+ mtspr dvlim,r1
+ lis r1,0x0808
+ ori r1,r1,0x0808
+ mtspr dnv0,r1
+ mtspr dnv1,r1
+ mtspr dnv2,r1
+ mtspr dnv3,r1
+ mtspr dtv0,r1
+ mtspr dtv1,r1
+ mtspr dtv2,r1
+ mtspr dtv3,r1
+ msync
+ isync
#endif /* CFG_INIT_RAM_DCACHE */
/* 440EP & 440GR are only 440er PPC's without internal SRAM */
@@ -1345,6 +1372,31 @@ relocate_code:
mr r4,r10
mr r5,r11
#endif
+
+#ifdef CFG_INIT_RAM_DCACHE
+ /*
+ * Unlock the previously locked d-cache
+ */
+ msync
+ isync
+ /* set TFLOOR/NFLOOR to 0 again */
+ lis r6,0x0001
+ ori r6,r6,0xf800
+ mtspr dvlim,r6
+ lis r6,0x0000
+ ori r6,r6,0x0000
+ mtspr dnv0,r6
+ mtspr dnv1,r6
+ mtspr dnv2,r6
+ mtspr dnv3,r6
+ mtspr dtv0,r6
+ mtspr dtv1,r6
+ mtspr dtv2,r6
+ mtspr dtv3,r6
+ msync
+ isync
+#endif /* CFG_INIT_RAM_DCACHE */
+
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
defined(CONFIG_440SP) || defined(CONFIG_440SPE)