diff options
Diffstat (limited to 'post/cpu/ppc4xx/denali_ecc.c')
| -rw-r--r-- | post/cpu/ppc4xx/denali_ecc.c | 90 |
1 files changed, 45 insertions, 45 deletions
diff --git a/post/cpu/ppc4xx/denali_ecc.c b/post/cpu/ppc4xx/denali_ecc.c index 3fa3ba624..47f529ef4 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) && ... */ |