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