cmd/iotrace.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2014 Google, Inc
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8 #include <iotrace.h>
   9
  10 static void do_print_stats(void)
  11 {
  12         ulong start, size, needed_size, offset, count;
  13
  14         printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis");
  15         iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
  16         printf("Start:  %08lx\n", start);
  17         printf("Actual Size:   %08lx\n", size);
  18         printf("Needed Size:   %08lx\n", needed_size);
  19         iotrace_get_region(&start, &size);
  20         printf("Region: %08lx\n", start);
  21         printf("Size:   %08lx\n", size);
  22         printf("Offset: %08lx\n", offset);
  23         printf("Output: %08lx\n", start + offset);
  24         printf("Count:  %08lx\n", count);
  25         printf("CRC32:  %08lx\n", (ulong)iotrace_get_checksum());
  26 }
  27
  28 static void do_print_trace(void)
  29 {
  30         ulong start, size, needed_size, offset, count;
  31
  32         struct iotrace_record *cur_record;
  33
  34         iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
  35
  36         if (!start || !size || !count)
  37                 return;
  38
  39         printf("Timestamp  Value          Address\n");
  40
  41         cur_record = (struct iotrace_record *)start;
  42         for (int i = 0; i < count; i++) {
  43                 if (cur_record->flags & IOT_WRITE)
  44                         printf("%08llu: 0x%08lx --> 0x%08llx\n",
  45                                cur_record->timestamp,
  46                                         cur_record->value,
  47                                         (unsigned long long)cur_record->addr);
  48                 else
  49                         printf("%08llu: 0x%08lx <-- 0x%08llx\n",
  50                                cur_record->timestamp,
  51                                         cur_record->value,
  52                                         (unsigned long long)cur_record->addr);
  53
  54                 cur_record++;
  55         }
  56 }
  57
  58 static int do_set_buffer(int argc, char *const argv[])
  59 {
  60         ulong addr = 0, size = 0;
  61
  62         if (argc == 2) {
  63                 addr = simple_strtoul(*argv++, NULL, 16);
  64                 size = simple_strtoul(*argv++, NULL, 16);
  65         } else if (argc != 0) {
  66                 return CMD_RET_USAGE;
  67         }
  68
  69         iotrace_set_buffer(addr, size);
  70
  71         return 0;
  72 }
  73
  74 static int do_set_region(int argc, char *const argv[])
  75 {
  76         ulong addr = 0, size = 0;
  77
  78         if (argc == 2) {
  79                 addr = simple_strtoul(*argv++, NULL, 16);
  80                 size = simple_strtoul(*argv++, NULL, 16);
  81         } else if (argc != 0) {
  82                 return CMD_RET_USAGE;
  83         }
  84
  85         iotrace_set_region(addr, size);
  86
  87         return 0;
  88 }
  89
  90 int do_iotrace(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  91 {
  92         const char *cmd = argc < 2 ? NULL : argv[1];
  93
  94         if (!cmd)
  95                 return cmd_usage(cmdtp);
  96         switch (*cmd) {
  97         case 'b':
  98                 return do_set_buffer(argc - 2, argv + 2);
  99         case 'l':
 100                 return do_set_region(argc - 2, argv + 2);
 101         case 'p':
 102                 iotrace_set_enabled(0);
 103                 break;
 104         case 'r':
 105                 iotrace_set_enabled(1);
 106                 break;
 107         case 's':
 108                 do_print_stats();
 109                 break;
 110         case 'd':
 111                 do_print_trace();
 112                 break;
 113         default:
 114                 return CMD_RET_USAGE;
 115         }
 116
 117         return 0;
 118 }
 119
 120 U_BOOT_CMD(
 121         iotrace,        4,      1,      do_iotrace,
 122         "iotrace utility commands",
 123         "stats                        - display iotrace stats\n"
 124         "iotrace buffer <address> <size>      - set iotrace buffer\n"
 125         "iotrace limit <address> <size>       - set iotrace region limit\n"
 126         "iotrace pause                        - pause tracing\n"
 127         "iotrace resume                       - resume tracing\n"
 128         "iotrace dump                         - dump iotrace buffer"
 129 );