aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/cpu/mpc83xx/ecc.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/cpu/mpc83xx/ecc.c')
-rw-r--r--arch/powerpc/cpu/mpc83xx/ecc.c390
1 files changed, 390 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc83xx/ecc.c b/arch/powerpc/cpu/mpc83xx/ecc.c
new file mode 100644
index 00000000000..f3942b411f6
--- /dev/null
+++ b/arch/powerpc/cpu/mpc83xx/ecc.c
@@ -0,0 +1,390 @@
+/*
+ * Copyright (C) 2007 Freescale Semiconductor, Inc.
+ *
+ * Dave Liu <daveliu@freescale.com>
+ * based on the contribution of Marian Balakowicz <m8@semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <common.h>
+#include <mpc83xx.h>
+#include <command.h>
+
+#if defined(CONFIG_DDR_ECC) && defined(CONFIG_DDR_ECC_CMD)
+void ecc_print_status(void)
+{
+ volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+ volatile ddr83xx_t *ddr = &immap->ddr;
+
+ printf("\nECC mode: %s\n\n",
+ (ddr->sdram_cfg & SDRAM_CFG_ECC_EN) ? "ON" : "OFF");
+
+ /* Interrupts */
+ printf("Memory Error Interrupt Enable:\n");
+ printf(" Multiple-Bit Error Interrupt Enable: %d\n",
+ (ddr->err_int_en & ECC_ERR_INT_EN_MBEE) ? 1 : 0);
+ printf(" Single-Bit Error Interrupt Enable: %d\n",
+ (ddr->err_int_en & ECC_ERR_INT_EN_SBEE) ? 1 : 0);
+ printf(" Memory Select Error Interrupt Enable: %d\n\n",
+ (ddr->err_int_en & ECC_ERR_INT_EN_MSEE) ? 1 : 0);
+
+ /* Error disable */
+ printf("Memory Error Disable:\n");
+ printf(" Multiple-Bit Error Disable: %d\n",
+ (ddr->err_disable & ECC_ERROR_DISABLE_MBED) ? 1 : 0);
+ printf(" Sinle-Bit Error Disable: %d\n",
+ (ddr->err_disable & ECC_ERROR_DISABLE_SBED) ? 1 : 0);
+ printf(" Memory Select Error Disable: %d\n\n",
+ (ddr->err_disable & ECC_ERROR_DISABLE_MSED) ? 1 : 0);
+
+ /* Error injection */
+ printf("Memory Data Path Error Injection Mask High/Low: %08x %08x\n",
+ ddr->data_err_inject_hi, ddr->data_err_inject_lo);
+
+ printf("Memory Data Path Error Injection Mask ECC:\n");
+ printf(" ECC Mirror Byte: %d\n",
+ (ddr->ecc_err_inject & ECC_ERR_INJECT_EMB) ? 1 : 0);
+ printf(" ECC Injection Enable: %d\n",
+ (ddr->ecc_err_inject & ECC_ERR_INJECT_EIEN) ? 1 : 0);
+ printf(" ECC Error Injection Mask: 0x%02x\n\n",
+ ddr->ecc_err_inject & ECC_ERR_INJECT_EEIM);
+
+ /* SBE counter/threshold */
+ printf("Memory Single-Bit Error Management (0..255):\n");
+ printf(" Single-Bit Error Threshold: %d\n",
+ (ddr->err_sbe & ECC_ERROR_MAN_SBET) >> ECC_ERROR_MAN_SBET_SHIFT);
+ printf(" Single-Bit Error Counter: %d\n\n",
+ (ddr->err_sbe & ECC_ERROR_MAN_SBEC) >> ECC_ERROR_MAN_SBEC_SHIFT);
+
+ /* Error detect */
+ printf("Memory Error Detect:\n");
+ printf(" Multiple Memory Errors: %d\n",
+ (ddr->err_detect & ECC_ERROR_DETECT_MME) ? 1 : 0);
+ printf(" Multiple-Bit Error: %d\n",
+ (ddr->err_detect & ECC_ERROR_DETECT_MBE) ? 1 : 0);
+ printf(" Single-Bit Error: %d\n",
+ (ddr->err_detect & ECC_ERROR_DETECT_SBE) ? 1 : 0);
+ printf(" Memory Select Error: %d\n\n",
+ (ddr->err_detect & ECC_ERROR_DETECT_MSE) ? 1 : 0);
+
+ /* Capture data */
+ printf("Memory Error Address Capture: 0x%08x\n", ddr->capture_address);
+ printf("Memory Data Path Read Capture High/Low: %08x %08x\n",
+ ddr->capture_data_hi, ddr->capture_data_lo);
+ printf("Memory Data Path Read Capture ECC: 0x%02x\n\n",
+ ddr->capture_ecc & CAPTURE_ECC_ECE);
+
+ printf("Memory Error Attributes Capture:\n");
+ printf(" Data Beat Number: %d\n",
+ (ddr->capture_attributes & ECC_CAPT_ATTR_BNUM) >>
+ ECC_CAPT_ATTR_BNUM_SHIFT);
+ printf(" Transaction Size: %d\n",
+ (ddr->capture_attributes & ECC_CAPT_ATTR_TSIZ) >>
+ ECC_CAPT_ATTR_TSIZ_SHIFT);
+ printf(" Transaction Source: %d\n",
+ (ddr->capture_attributes & ECC_CAPT_ATTR_TSRC) >>
+ ECC_CAPT_ATTR_TSRC_SHIFT);
+ printf(" Transaction Type: %d\n",
+ (ddr->capture_attributes & ECC_CAPT_ATTR_TTYP) >>
+ ECC_CAPT_ATTR_TTYP_SHIFT);
+ printf(" Error Information Valid: %d\n\n",
+ ddr->capture_attributes & ECC_CAPT_ATTR_VLD);
+}
+
+int do_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+ volatile ddr83xx_t *ddr = &immap->ddr;
+ volatile u32 val;
+ u64 *addr;
+ u32 count;
+ register u64 *i;
+ u32 ret[2];
+ u32 pattern[2];
+ u32 writeback[2];
+
+ /* The pattern is written into memory to generate error */
+ pattern[0] = 0xfedcba98UL;
+ pattern[1] = 0x76543210UL;
+
+ /* After injecting error, re-initialize the memory with the value */
+ writeback[0] = 0x01234567UL;
+ writeback[1] = 0x89abcdefUL;
+
+ if (argc > 4) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+
+ if (argc == 2) {
+ if (strcmp(argv[1], "status") == 0) {
+ ecc_print_status();
+ return 0;
+ } else if (strcmp(argv[1], "captureclear") == 0) {
+ ddr->capture_address = 0;
+ ddr->capture_data_hi = 0;
+ ddr->capture_data_lo = 0;
+ ddr->capture_ecc = 0;
+ ddr->capture_attributes = 0;
+ return 0;
+ }
+ }
+ if (argc == 3) {
+ if (strcmp(argv[1], "sbecnt") == 0) {
+ val = simple_strtoul(argv[2], NULL, 10);
+ if (val > 255) {
+ printf("Incorrect Counter value, "
+ "should be 0..255\n");
+ return 1;
+ }
+
+ val = (val << ECC_ERROR_MAN_SBEC_SHIFT);
+ val |= (ddr->err_sbe & ECC_ERROR_MAN_SBET);
+
+ ddr->err_sbe = val;
+ return 0;
+ } else if (strcmp(argv[1], "sbethr") == 0) {
+ val = simple_strtoul(argv[2], NULL, 10);
+ if (val > 255) {
+ printf("Incorrect Counter value, "
+ "should be 0..255\n");
+ return 1;
+ }
+
+ val = (val << ECC_ERROR_MAN_SBET_SHIFT);
+ val |= (ddr->err_sbe & ECC_ERROR_MAN_SBEC);
+
+ ddr->err_sbe = val;
+ return 0;
+ } else if (strcmp(argv[1], "errdisable") == 0) {
+ val = ddr->err_disable;
+
+ if (strcmp(argv[2], "+sbe") == 0) {
+ val |= ECC_ERROR_DISABLE_SBED;
+ } else if (strcmp(argv[2], "+mbe") == 0) {
+ val |= ECC_ERROR_DISABLE_MBED;
+ } else if (strcmp(argv[2], "+mse") == 0) {
+ val |= ECC_ERROR_DISABLE_MSED;
+ } else if (strcmp(argv[2], "+all") == 0) {
+ val |= (ECC_ERROR_DISABLE_SBED |
+ ECC_ERROR_DISABLE_MBED |
+ ECC_ERROR_DISABLE_MSED);
+ } else if (strcmp(argv[2], "-sbe") == 0) {
+ val &= ~ECC_ERROR_DISABLE_SBED;
+ } else if (strcmp(argv[2], "-mbe") == 0) {
+ val &= ~ECC_ERROR_DISABLE_MBED;
+ } else if (strcmp(argv[2], "-mse") == 0) {
+ val &= ~ECC_ERROR_DISABLE_MSED;
+ } else if (strcmp(argv[2], "-all") == 0) {
+ val &= ~(ECC_ERROR_DISABLE_SBED |
+ ECC_ERROR_DISABLE_MBED |
+ ECC_ERROR_DISABLE_MSED);
+ } else {
+ printf("Incorrect err_disable field\n");
+ return 1;
+ }
+
+ ddr->err_disable = val;
+ __asm__ __volatile__("sync");
+ __asm__ __volatile__("isync");
+ return 0;
+ } else if (strcmp(argv[1], "errdetectclr") == 0) {
+ val = ddr->err_detect;
+
+ if (strcmp(argv[2], "mme") == 0) {
+ val |= ECC_ERROR_DETECT_MME;
+ } else if (strcmp(argv[2], "sbe") == 0) {
+ val |= ECC_ERROR_DETECT_SBE;
+ } else if (strcmp(argv[2], "mbe") == 0) {
+ val |= ECC_ERROR_DETECT_MBE;
+ } else if (strcmp(argv[2], "mse") == 0) {
+ val |= ECC_ERROR_DETECT_MSE;
+ } else if (strcmp(argv[2], "all") == 0) {
+ val |= (ECC_ERROR_DETECT_MME |
+ ECC_ERROR_DETECT_MBE |
+ ECC_ERROR_DETECT_SBE |
+ ECC_ERROR_DETECT_MSE);
+ } else {
+ printf("Incorrect err_detect field\n");
+ return 1;
+ }
+
+ ddr->err_detect = val;
+ return 0;
+ } else if (strcmp(argv[1], "injectdatahi") == 0) {
+ val = simple_strtoul(argv[2], NULL, 16);
+
+ ddr->data_err_inject_hi = val;
+ return 0;
+ } else if (strcmp(argv[1], "injectdatalo") == 0) {
+ val = simple_strtoul(argv[2], NULL, 16);
+
+ ddr->data_err_inject_lo = val;
+ return 0;
+ } else if (strcmp(argv[1], "injectecc") == 0) {
+ val = simple_strtoul(argv[2], NULL, 16);
+ if (val > 0xff) {
+ printf("Incorrect ECC inject mask, "
+ "should be 0x00..0xff\n");
+ return 1;
+ }
+ val |= (ddr->ecc_err_inject & ~ECC_ERR_INJECT_EEIM);
+
+ ddr->ecc_err_inject = val;
+ return 0;
+ } else if (strcmp(argv[1], "inject") == 0) {
+ val = ddr->ecc_err_inject;
+
+ if (strcmp(argv[2], "en") == 0)
+ val |= ECC_ERR_INJECT_EIEN;
+ else if (strcmp(argv[2], "dis") == 0)
+ val &= ~ECC_ERR_INJECT_EIEN;
+ else
+ printf("Incorrect command\n");
+
+ ddr->ecc_err_inject = val;
+ __asm__ __volatile__("sync");
+ __asm__ __volatile__("isync");
+ return 0;
+ } else if (strcmp(argv[1], "mirror") == 0) {
+ val = ddr->ecc_err_inject;
+
+ if (strcmp(argv[2], "en") == 0)
+ val |= ECC_ERR_INJECT_EMB;
+ else if (strcmp(argv[2], "dis") == 0)
+ val &= ~ECC_ERR_INJECT_EMB;
+ else
+ printf("Incorrect command\n");
+
+ ddr->ecc_err_inject = val;
+ return 0;
+ }
+ }
+ if (argc == 4) {
+ if (strcmp(argv[1], "testdw") == 0) {
+ addr = (u64 *) simple_strtoul(argv[2], NULL, 16);
+ count = simple_strtoul(argv[3], NULL, 16);
+
+ if ((u32) addr % 8) {
+ printf("Address not alligned on "
+ "double word boundary\n");
+ return 1;
+ }
+ disable_interrupts();
+
+ for (i = addr; i < addr + count; i++) {
+
+ /* enable injects */
+ ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
+ __asm__ __volatile__("sync");
+ __asm__ __volatile__("isync");
+
+ /* write memory location injecting errors */
+ ppcDWstore((u32 *) i, pattern);
+ __asm__ __volatile__("sync");
+
+ /* disable injects */
+ ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
+ __asm__ __volatile__("sync");
+ __asm__ __volatile__("isync");
+
+ /* read data, this generates ECC error */
+ ppcDWload((u32 *) i, ret);
+ __asm__ __volatile__("sync");
+
+ /* re-initialize memory, double word write the location again,
+ * generates new ECC code this time */
+ ppcDWstore((u32 *) i, writeback);
+ __asm__ __volatile__("sync");
+ }
+ enable_interrupts();
+ return 0;
+ }
+ if (strcmp(argv[1], "testword") == 0) {
+ addr = (u64 *) simple_strtoul(argv[2], NULL, 16);
+ count = simple_strtoul(argv[3], NULL, 16);
+
+ if ((u32) addr % 8) {
+ printf("Address not alligned on "
+ "double word boundary\n");
+ return 1;
+ }
+ disable_interrupts();
+
+ for (i = addr; i < addr + count; i++) {
+
+ /* enable injects */
+ ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
+ __asm__ __volatile__("sync");
+ __asm__ __volatile__("isync");
+
+ /* write memory location injecting errors */
+ *(u32 *) i = 0xfedcba98UL;
+ __asm__ __volatile__("sync");
+
+ /* sub double word write,
+ * bus will read-modify-write,
+ * generates ECC error */
+ *((u32 *) i + 1) = 0x76543210UL;
+ __asm__ __volatile__("sync");
+
+ /* disable injects */
+ ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
+ __asm__ __volatile__("sync");
+ __asm__ __volatile__("isync");
+
+ /* re-initialize memory,
+ * double word write the location again,
+ * generates new ECC code this time */
+ ppcDWstore((u32 *) i, writeback);
+ __asm__ __volatile__("sync");
+ }
+ enable_interrupts();
+ return 0;
+ }
+ }
+ cmd_usage(cmdtp);
+ return 1;
+}
+
+U_BOOT_CMD(ecc, 4, 0, do_ecc,
+ "support for DDR ECC features",
+ "status - print out status info\n"
+ "ecc captureclear - clear capture regs data\n"
+ "ecc sbecnt <val> - set Single-Bit Error counter\n"
+ "ecc sbethr <val> - set Single-Bit Threshold\n"
+ "ecc errdisable <flag> - clear/set disable Memory Error Disable, flag:\n"
+ " [-|+]sbe - Single-Bit Error\n"
+ " [-|+]mbe - Multiple-Bit Error\n"
+ " [-|+]mse - Memory Select Error\n"
+ " [-|+]all - all errors\n"
+ "ecc errdetectclr <flag> - clear Memory Error Detect, flag:\n"
+ " mme - Multiple Memory Errors\n"
+ " sbe - Single-Bit Error\n"
+ " mbe - Multiple-Bit Error\n"
+ " mse - Memory Select Error\n"
+ " all - all errors\n"
+ "ecc injectdatahi <hi> - set Memory Data Path Error Injection Mask High\n"
+ "ecc injectdatalo <lo> - set Memory Data Path Error Injection Mask Low\n"
+ "ecc injectecc <ecc> - set ECC Error Injection Mask\n"
+ "ecc inject <en|dis> - enable/disable error injection\n"
+ "ecc mirror <en|dis> - enable/disable mirror byte\n"
+ "ecc testdw <addr> <cnt> - test mem region with double word access:\n"
+ " - enables injects\n"
+ " - writes pattern injecting errors with double word access\n"
+ " - disables injects\n"
+ " - reads pattern back with double word access, generates error\n"
+ " - re-inits memory\n"
+ "ecc testword <addr> <cnt> - test mem region with word access:\n"
+ " - enables injects\n"
+ " - writes pattern injecting errors with word access\n"
+ " - writes pattern with word access, generates error\n"
+ " - disables injects\n" " - re-inits memory");
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 23:43:34 +0000