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Diffstat (limited to 'post/cpu/ppc4xx/denali_ecc.c')
-rw-r--r--post/cpu/ppc4xx/denali_ecc.c90
1 files changed, 45 insertions, 45 deletions
diff --git a/post/cpu/ppc4xx/denali_ecc.c b/post/cpu/ppc4xx/denali_ecc.c
index 3fa3ba6..47f529e 100644
--- a/post/cpu/ppc4xx/denali_ecc.c
+++ b/post/cpu/ppc4xx/denali_ecc.c
@@ -31,7 +31,7 @@
#include <common.h>
#include <watchdog.h>
-#ifdef CONFIG_POST
+#if defined(CONFIG_POST) && (defined(CONFIG_440EPX) || defined(CONFIG_440GRX))
#include <post.h>
@@ -47,8 +47,6 @@
#include <asm/io.h>
#include <ppc440.h>
-#include "../../../board/lwmon5/sdram.h"
-
DECLARE_GLOBAL_DATA_PTR;
const static unsigned char syndrome_codes[] = {
@@ -65,9 +63,9 @@ const static unsigned char syndrome_codes[] = {
#define ECC_START_ADDR 0x10
#define ECC_STOP_ADDR 0x2000
-#define ECC_PATTERN 0x0101010101010101ull
-#define ECC_PATTERN_CORR 0x0101010101010100ull
-#define ECC_PATTERN_UNCORR 0x010101010101010Full
+#define ECC_PATTERN 0x01010101
+#define ECC_PATTERN_CORR 0x11010101
+#define ECC_PATTERN_UNCORR 0xF1010101
static int test_ecc_error(void)
{
@@ -152,68 +150,78 @@ static int test_ecc_error(void)
static int test_ecc(unsigned long ecc_addr)
{
- volatile unsigned long long *ecc_mem;
unsigned long value;
- unsigned long ecc_data;
- volatile unsigned long *lecc_mem;
- int pret, ret = 0;
+ volatile unsigned *const ecc_mem = (volatile unsigned *) ecc_addr;
+ int pret;
+ int ret = 0;
sync();
eieio();
WATCHDOG_RESET();
- ecc_mem = (unsigned long long *)ecc_addr;
- lecc_mem = (ulong *)ecc_addr;
- *ecc_mem = ECC_PATTERN;
+ debug("Entering test_ecc(0x%08lX)\n", ecc_addr);
+ out_be32(ecc_mem, ECC_PATTERN);
+ out_be32(ecc_mem + 1, ECC_PATTERN);
+ in_be32(ecc_mem);
pret = test_ecc_error();
- if (pret != 0)
+ if (pret != 0) {
+ debug("pret: expected 0, got %d\n", pret);
ret = 1;
-
- /* disconnect ecc */
+ }
+ /* test for correctable error */
+ /* disconnect from ecc storage */
mfsdram(DDR0_22, value);
mtsdram(DDR0_22, (value &~ DDR0_22_CTRL_RAW_MASK)
| DDR0_22_CTRL_RAW_ECC_DISABLE);
- /* injecting error */
- *ecc_mem = ECC_PATTERN_CORR;
+ /* creating (correctable) single-bit error */
+ out_be32(ecc_mem, ECC_PATTERN_CORR);
/* enable ecc */
mfsdram(DDR0_22, value);
mtsdram(DDR0_22, (value &~ DDR0_22_CTRL_RAW_MASK)
| DDR0_22_CTRL_RAW_ECC_ENABLE);
+ sync();
+ eieio();
- ecc_data = *lecc_mem;
+ in_be32(ecc_mem);
pret = test_ecc_error();
/* if read data ok, 1 correctable error must be fixed */
- if (pret != 3)
+ if (pret != 3) {
+ debug("pret: expected 3, got %d\n", pret);
ret = 1;
-
+ }
/* test for uncorrectable error */
/* disconnect from ecc storage */
mfsdram(DDR0_22, value);
mtsdram(DDR0_22, (value &~ DDR0_22_CTRL_RAW_MASK)
| DDR0_22_CTRL_RAW_NO_ECC_RAM);
- /* injecting multiply bit error */
-
- *ecc_mem = ECC_PATTERN_UNCORR;
+ /* creating (uncorrectable) multiple-bit error */
+ out_be32(ecc_mem, ECC_PATTERN_UNCORR);
/* enable ecc */
mfsdram(DDR0_22, value);
mtsdram(DDR0_22, (value &~ DDR0_22_CTRL_RAW_MASK)
| DDR0_22_CTRL_RAW_ECC_ENABLE);
+ sync();
+ eieio();
- ecc_data = *lecc_mem;
- /* what the data should be read? */
-
+ in_be32(ecc_mem);
pret = test_ecc_error();
/* info about uncorrectable error must appear */
- if (pret != 5)
+ if (pret != 5) {
+ debug("pret: expected 5, got %d\n", pret);
ret = 1;
+ }
+ /* remove error from SDRAM */
+ out_be32(ecc_mem, ECC_PATTERN);
+ /* clear error caused by read-modify-write */
+ mfsdram(DDR0_00, value);
+ mtsdram(DDR0_00, value | DDR0_00_INT_ACK_ALL);
sync();
eieio();
-
return ret;
}
@@ -223,10 +231,15 @@ int ecc_post_test (int flags)
unsigned long value;
unsigned long iaddr;
-#if CONFIG_DDR_ECC
sync();
eieio();
+ mfsdram(DDR0_22, value);
+ if (0x3 != DDR0_22_CTRL_RAW_DECODE(value)) {
+ debug("SDRAM ECC not enabled, skipping ECC POST.\n");
+ return 0;
+ }
+
/* mask all int */
mfsdram(DDR0_01, value);
mtsdram(DDR0_01, (value &~ DDR0_01_INT_MASK_MASK)
@@ -236,32 +249,19 @@ int ecc_post_test (int flags)
mfsdram(DDR0_00, value);
mtsdram(DDR0_00, value | DDR0_00_INT_ACK_ALL);
- /* enable full support of ECC */
- mfsdram(DDR0_22, value);
- mtsdram(DDR0_22, (value &~ DDR0_22_CTRL_RAW_MASK)
- | DDR0_22_CTRL_RAW_ECC_ENABLE);
-
- for (iaddr = ECC_START_ADDR; iaddr < ECC_STOP_ADDR; iaddr += iaddr) {
+ for (iaddr = ECC_START_ADDR; iaddr <= ECC_STOP_ADDR; iaddr += iaddr) {
ret = test_ecc(iaddr);
if (ret)
break;
}
-
- /* clear error status */
- mfsdram(DDR0_00, value);
- mtsdram(DDR0_00, value | DDR0_00_INT_ACK_ALL);
-
/*
* Clear possible errors resulting from ECC testing.
* If not done, then we could get an interrupt later on when
* exceptions are enabled.
*/
set_mcsr(get_mcsr());
-#endif
-
return ret;
}
-
#endif /* CONFIG_POST & CFG_POST_ECC */
-#endif /* CONFIG_POST */
+#endif /* defined(CONFIG_POST) && ... */