arch/powerpc/cpu/mpc83xx/ecc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2007-2011 Freescale Semiconductor, Inc.
   4  *
   5  * Dave Liu <daveliu@freescale.com>
   6  * based on the contribution of Marian Balakowicz <m8@semihalf.com>
   7  */
   8
   9 #include <common.h>
  10 #include <mpc83xx.h>
  11 #include <command.h>
  12
  13 #if defined(CONFIG_DDR_ECC) && defined(CONFIG_DDR_ECC_CMD)
  14 void ecc_print_status(void)
  15 {
  16         immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  17 #ifdef CONFIG_SYS_FSL_DDR2
  18         struct ccsr_ddr __iomem *ddr = &immap->ddr;
  19 #else
  20         ddr83xx_t *ddr = &immap->ddr;
  21 #endif
  22
  23         printf("\nECC mode: %s\n\n",
  24                (ddr->sdram_cfg & SDRAM_CFG_ECC_EN) ? "ON" : "OFF");
  25
  26         /* Interrupts */
  27         printf("Memory Error Interrupt Enable:\n");
  28         printf("  Multiple-Bit Error Interrupt Enable: %d\n",
  29                (ddr->err_int_en & ECC_ERR_INT_EN_MBEE) ? 1 : 0);
  30         printf("  Single-Bit Error Interrupt Enable: %d\n",
  31                (ddr->err_int_en & ECC_ERR_INT_EN_SBEE) ? 1 : 0);
  32         printf("  Memory Select Error Interrupt Enable: %d\n\n",
  33                (ddr->err_int_en & ECC_ERR_INT_EN_MSEE) ? 1 : 0);
  34
  35         /* Error disable */
  36         printf("Memory Error Disable:\n");
  37         printf("  Multiple-Bit Error Disable: %d\n",
  38                (ddr->err_disable & ECC_ERROR_DISABLE_MBED) ? 1 : 0);
  39         printf("  Single-Bit Error Disable: %d\n",
  40                (ddr->err_disable & ECC_ERROR_DISABLE_SBED) ? 1 : 0);
  41         printf("  Memory Select Error Disable: %d\n\n",
  42                (ddr->err_disable & ECC_ERROR_DISABLE_MSED) ? 1 : 0);
  43
  44         /* Error injection */
  45         printf("Memory Data Path Error Injection Mask High/Low: %08x %08x\n",
  46                ddr->data_err_inject_hi, ddr->data_err_inject_lo);
  47
  48         printf("Memory Data Path Error Injection Mask ECC:\n");
  49         printf("  ECC Mirror Byte: %d\n",
  50                (ddr->ecc_err_inject & ECC_ERR_INJECT_EMB) ? 1 : 0);
  51         printf("  ECC Injection Enable: %d\n",
  52                (ddr->ecc_err_inject & ECC_ERR_INJECT_EIEN) ? 1 : 0);
  53         printf("  ECC Error Injection Mask: 0x%02x\n\n",
  54                ddr->ecc_err_inject & ECC_ERR_INJECT_EEIM);
  55
  56         /* SBE counter/threshold */
  57         printf("Memory Single-Bit Error Management (0..255):\n");
  58         printf("  Single-Bit Error Threshold: %d\n",
  59                (ddr->err_sbe & ECC_ERROR_MAN_SBET) >> ECC_ERROR_MAN_SBET_SHIFT);
  60         printf("  Single-Bit Error Counter: %d\n\n",
  61                (ddr->err_sbe & ECC_ERROR_MAN_SBEC) >> ECC_ERROR_MAN_SBEC_SHIFT);
  62
  63         /* Error detect */
  64         printf("Memory Error Detect:\n");
  65         printf("  Multiple Memory Errors: %d\n",
  66                (ddr->err_detect & ECC_ERROR_DETECT_MME) ? 1 : 0);
  67         printf("  Multiple-Bit Error: %d\n",
  68                (ddr->err_detect & ECC_ERROR_DETECT_MBE) ? 1 : 0);
  69         printf("  Single-Bit Error: %d\n",
  70                (ddr->err_detect & ECC_ERROR_DETECT_SBE) ? 1 : 0);
  71         printf("  Memory Select Error: %d\n\n",
  72                (ddr->err_detect & ECC_ERROR_DETECT_MSE) ? 1 : 0);
  73
  74         /* Capture data */
  75         printf("Memory Error Address Capture: 0x%08x\n", ddr->capture_address);
  76         printf("Memory Data Path Read Capture High/Low: %08x %08x\n",
  77                ddr->capture_data_hi, ddr->capture_data_lo);
  78         printf("Memory Data Path Read Capture ECC: 0x%02x\n\n",
  79                ddr->capture_ecc & CAPTURE_ECC_ECE);
  80
  81         printf("Memory Error Attributes Capture:\n");
  82         printf(" Data Beat Number: %d\n",
  83                (ddr->capture_attributes & ECC_CAPT_ATTR_BNUM) >>
  84                ECC_CAPT_ATTR_BNUM_SHIFT);
  85         printf("  Transaction Size: %d\n",
  86                (ddr->capture_attributes & ECC_CAPT_ATTR_TSIZ) >>
  87                ECC_CAPT_ATTR_TSIZ_SHIFT);
  88         printf("  Transaction Source: %d\n",
  89                (ddr->capture_attributes & ECC_CAPT_ATTR_TSRC) >>
  90                ECC_CAPT_ATTR_TSRC_SHIFT);
  91         printf("  Transaction Type: %d\n",
  92                (ddr->capture_attributes & ECC_CAPT_ATTR_TTYP) >>
  93                ECC_CAPT_ATTR_TTYP_SHIFT);
  94         printf("  Error Information Valid: %d\n\n",
  95                ddr->capture_attributes & ECC_CAPT_ATTR_VLD);
  96 }
  97
  98 int do_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
  99 {
 100         immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 101 #ifdef CONFIG_SYS_FSL_DDR2
 102         struct ccsr_ddr __iomem *ddr = &immap->ddr;
 103 #else
 104         ddr83xx_t *ddr = &immap->ddr;
 105 #endif
 106         volatile u32 val;
 107         u64 *addr;
 108         u32 count;
 109         register u64 *i;
 110         u32 ret[2];
 111         u32 pattern[2];
 112         u32 writeback[2];
 113
 114         /* The pattern is written into memory to generate error */
 115         pattern[0] = 0xfedcba98UL;
 116         pattern[1] = 0x76543210UL;
 117
 118         /* After injecting error, re-initialize the memory with the value */
 119         writeback[0] = 0x01234567UL;
 120         writeback[1] = 0x89abcdefUL;
 121
 122         if (argc > 4)
 123                 return cmd_usage(cmdtp);
 124
 125         if (argc == 2) {
 126                 if (strcmp(argv[1], "status") == 0) {
 127                         ecc_print_status();
 128                         return 0;
 129                 } else if (strcmp(argv[1], "captureclear") == 0) {
 130                         ddr->capture_address = 0;
 131                         ddr->capture_data_hi = 0;
 132                         ddr->capture_data_lo = 0;
 133                         ddr->capture_ecc = 0;
 134                         ddr->capture_attributes = 0;
 135                         return 0;
 136                 }
 137         }
 138         if (argc == 3) {
 139                 if (strcmp(argv[1], "sbecnt") == 0) {
 140                         val = simple_strtoul(argv[2], NULL, 10);
 141                         if (val > 255) {
 142                                 printf("Incorrect Counter value, "
 143                                        "should be 0..255\n");
 144                                 return 1;
 145                         }
 146
 147                         val = (val << ECC_ERROR_MAN_SBEC_SHIFT);
 148                         val |= (ddr->err_sbe & ECC_ERROR_MAN_SBET);
 149
 150                         ddr->err_sbe = val;
 151                         return 0;
 152                 } else if (strcmp(argv[1], "sbethr") == 0) {
 153                         val = simple_strtoul(argv[2], NULL, 10);
 154                         if (val > 255) {
 155                                 printf("Incorrect Counter value, "
 156                                        "should be 0..255\n");
 157                                 return 1;
 158                         }
 159
 160                         val = (val << ECC_ERROR_MAN_SBET_SHIFT);
 161                         val |= (ddr->err_sbe & ECC_ERROR_MAN_SBEC);
 162
 163                         ddr->err_sbe = val;
 164                         return 0;
 165                 } else if (strcmp(argv[1], "errdisable") == 0) {
 166                         val = ddr->err_disable;
 167
 168                         if (strcmp(argv[2], "+sbe") == 0) {
 169                                 val |= ECC_ERROR_DISABLE_SBED;
 170                         } else if (strcmp(argv[2], "+mbe") == 0) {
 171                                 val |= ECC_ERROR_DISABLE_MBED;
 172                         } else if (strcmp(argv[2], "+mse") == 0) {
 173                                 val |= ECC_ERROR_DISABLE_MSED;
 174                         } else if (strcmp(argv[2], "+all") == 0) {
 175                                 val |= (ECC_ERROR_DISABLE_SBED |
 176                                         ECC_ERROR_DISABLE_MBED |
 177                                         ECC_ERROR_DISABLE_MSED);
 178                         } else if (strcmp(argv[2], "-sbe") == 0) {
 179                                 val &= ~ECC_ERROR_DISABLE_SBED;
 180                         } else if (strcmp(argv[2], "-mbe") == 0) {
 181                                 val &= ~ECC_ERROR_DISABLE_MBED;
 182                         } else if (strcmp(argv[2], "-mse") == 0) {
 183                                 val &= ~ECC_ERROR_DISABLE_MSED;
 184                         } else if (strcmp(argv[2], "-all") == 0) {
 185                                 val &= ~(ECC_ERROR_DISABLE_SBED |
 186                                          ECC_ERROR_DISABLE_MBED |
 187                                          ECC_ERROR_DISABLE_MSED);
 188                         } else {
 189                                 printf("Incorrect err_disable field\n");
 190                                 return 1;
 191                         }
 192
 193                         ddr->err_disable = val;
 194                         sync();
 195                         isync();
 196                         return 0;
 197                 } else if (strcmp(argv[1], "errdetectclr") == 0) {
 198                         val = ddr->err_detect;
 199
 200                         if (strcmp(argv[2], "mme") == 0) {
 201                                 val |= ECC_ERROR_DETECT_MME;
 202                         } else if (strcmp(argv[2], "sbe") == 0) {
 203                                 val |= ECC_ERROR_DETECT_SBE;
 204                         } else if (strcmp(argv[2], "mbe") == 0) {
 205                                 val |= ECC_ERROR_DETECT_MBE;
 206                         } else if (strcmp(argv[2], "mse") == 0) {
 207                                 val |= ECC_ERROR_DETECT_MSE;
 208                         } else if (strcmp(argv[2], "all") == 0) {
 209                                 val |= (ECC_ERROR_DETECT_MME |
 210                                         ECC_ERROR_DETECT_MBE |
 211                                         ECC_ERROR_DETECT_SBE |
 212                                         ECC_ERROR_DETECT_MSE);
 213                         } else {
 214                                 printf("Incorrect err_detect field\n");
 215                                 return 1;
 216                         }
 217
 218                         ddr->err_detect = val;
 219                         return 0;
 220                 } else if (strcmp(argv[1], "injectdatahi") == 0) {
 221                         val = simple_strtoul(argv[2], NULL, 16);
 222
 223                         ddr->data_err_inject_hi = val;
 224                         return 0;
 225                 } else if (strcmp(argv[1], "injectdatalo") == 0) {
 226                         val = simple_strtoul(argv[2], NULL, 16);
 227
 228                         ddr->data_err_inject_lo = val;
 229                         return 0;
 230                 } else if (strcmp(argv[1], "injectecc") == 0) {
 231                         val = simple_strtoul(argv[2], NULL, 16);
 232                         if (val > 0xff) {
 233                                 printf("Incorrect ECC inject mask, "
 234                                        "should be 0x00..0xff\n");
 235                                 return 1;
 236                         }
 237                         val |= (ddr->ecc_err_inject & ~ECC_ERR_INJECT_EEIM);
 238
 239                         ddr->ecc_err_inject = val;
 240                         return 0;
 241                 } else if (strcmp(argv[1], "inject") == 0) {
 242                         val = ddr->ecc_err_inject;
 243
 244                         if (strcmp(argv[2], "en") == 0)
 245                                 val |= ECC_ERR_INJECT_EIEN;
 246                         else if (strcmp(argv[2], "dis") == 0)
 247                                 val &= ~ECC_ERR_INJECT_EIEN;
 248                         else
 249                                 printf("Incorrect command\n");
 250
 251                         ddr->ecc_err_inject = val;
 252                         sync();
 253                         isync();
 254                         return 0;
 255                 } else if (strcmp(argv[1], "mirror") == 0) {
 256                         val = ddr->ecc_err_inject;
 257
 258                         if (strcmp(argv[2], "en") == 0)
 259                                 val |= ECC_ERR_INJECT_EMB;
 260                         else if (strcmp(argv[2], "dis") == 0)
 261                                 val &= ~ECC_ERR_INJECT_EMB;
 262                         else
 263                                 printf("Incorrect command\n");
 264
 265                         ddr->ecc_err_inject = val;
 266                         return 0;
 267                 }
 268         }
 269         if (argc == 4) {
 270                 if (strcmp(argv[1], "testdw") == 0) {
 271                         addr = (u64 *) simple_strtoul(argv[2], NULL, 16);
 272                         count = simple_strtoul(argv[3], NULL, 16);
 273
 274                         if ((u32) addr % 8) {
 275                                 printf("Address not aligned on "
 276                                        "double word boundary\n");
 277                                 return 1;
 278                         }
 279                         disable_interrupts();
 280
 281                         for (i = addr; i < addr + count; i++) {
 282
 283                                 /* enable injects */
 284                                 ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
 285                                 sync();
 286                                 isync();
 287
 288                                 /* write memory location injecting errors */
 289                                 ppcDWstore((u32 *) i, pattern);
 290                                 sync();
 291
 292                                 /* disable injects */
 293                                 ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
 294                                 sync();
 295                                 isync();
 296
 297                                 /* read data, this generates ECC error */
 298                                 ppcDWload((u32 *) i, ret);
 299                                 sync();
 300
 301                                 /* re-initialize memory, double word write the location again,
 302                                  * generates new ECC code this time */
 303                                 ppcDWstore((u32 *) i, writeback);
 304                                 sync();
 305                         }
 306                         enable_interrupts();
 307                         return 0;
 308                 }
 309                 if (strcmp(argv[1], "testword") == 0) {
 310                         addr = (u64 *) simple_strtoul(argv[2], NULL, 16);
 311                         count = simple_strtoul(argv[3], NULL, 16);
 312
 313                         if ((u32) addr % 8) {
 314                                 printf("Address not aligned on "
 315                                        "double word boundary\n");
 316                                 return 1;
 317                         }
 318                         disable_interrupts();
 319
 320                         for (i = addr; i < addr + count; i++) {
 321
 322                                 /* enable injects */
 323                                 ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
 324                                 sync();
 325                                 isync();
 326
 327                                 /* write memory location injecting errors */
 328                                 *(u32 *) i = 0xfedcba98UL;
 329                                 sync();
 330
 331                                 /* sub double word write,
 332                                  * bus will read-modify-write,
 333                                  * generates ECC error */
 334                                 *((u32 *) i + 1) = 0x76543210UL;
 335                                 sync();
 336
 337                                 /* disable injects */
 338                                 ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
 339                                 sync();
 340                                 isync();
 341
 342                                 /* re-initialize memory,
 343                                  * double word write the location again,
 344                                  * generates new ECC code this time */
 345                                 ppcDWstore((u32 *) i, writeback);
 346                                 sync();
 347                         }
 348                         enable_interrupts();
 349                         return 0;
 350                 }
 351         }
 352         return cmd_usage(cmdtp);
 353 }
 354
 355 U_BOOT_CMD(ecc, 4, 0, do_ecc,
 356            "support for DDR ECC features",
 357            "status              - print out status info\n"
 358            "ecc captureclear        - clear capture regs data\n"
 359            "ecc sbecnt <val>        - set Single-Bit Error counter\n"
 360            "ecc sbethr <val>        - set Single-Bit Threshold\n"
 361            "ecc errdisable <flag>   - clear/set disable Memory Error Disable, flag:\n"
 362            "  [-|+]sbe - Single-Bit Error\n"
 363            "  [-|+]mbe - Multiple-Bit Error\n"
 364            "  [-|+]mse - Memory Select Error\n"
 365            "  [-|+]all - all errors\n"
 366            "ecc errdetectclr <flag> - clear Memory Error Detect, flag:\n"
 367            "  mme - Multiple Memory Errors\n"
 368            "  sbe - Single-Bit Error\n"
 369            "  mbe - Multiple-Bit Error\n"
 370            "  mse - Memory Select Error\n"
 371            "  all - all errors\n"
 372            "ecc injectdatahi <hi>  - set Memory Data Path Error Injection Mask High\n"
 373            "ecc injectdatalo <lo>  - set Memory Data Path Error Injection Mask Low\n"
 374            "ecc injectecc <ecc>    - set ECC Error Injection Mask\n"
 375            "ecc inject <en|dis>    - enable/disable error injection\n"
 376            "ecc mirror <en|dis>    - enable/disable mirror byte\n"
 377            "ecc testdw <addr> <cnt>  - test mem region with double word access:\n"
 378            "  - enables injects\n"
 379            "  - writes pattern injecting errors with double word access\n"
 380            "  - disables injects\n"
 381            "  - reads pattern back with double word access, generates error\n"
 382            "  - re-inits memory\n"
 383            "ecc testword <addr> <cnt>  - test mem region with word access:\n"
 384            "  - enables injects\n"
 385            "  - writes pattern injecting errors with word access\n"
 386            "  - writes pattern with word access, generates error\n"
 387            "  - disables injects\n" "  - re-inits memory");
 388 #endif