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, offset, count;
  13
  14         printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis");
  15         iotrace_get_buffer(&start, &size, &offset, &count);
  16         printf("Start:  %08lx\n", start);
  17         printf("Size:   %08lx\n", size);
  18         printf("Offset: %08lx\n", offset);
  19         printf("Output: %08lx\n", start + offset);
  20         printf("Count:  %08lx\n", count);
  21         printf("CRC32:  %08lx\n", (ulong)iotrace_get_checksum());
  22 }
  23
  24 static int do_set_buffer(int argc, char * const argv[])
  25 {
  26         ulong addr = 0, size = 0;
  27
  28         if (argc == 2) {
  29                 addr = simple_strtoul(*argv++, NULL, 16);
  30                 size = simple_strtoul(*argv++, NULL, 16);
  31         } else if (argc != 0) {
  32                 return CMD_RET_USAGE;
  33         }
  34
  35         iotrace_set_buffer(addr, size);
  36
  37         return 0;
  38 }
  39
  40 int do_iotrace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  41 {
  42         const char *cmd = argc < 2 ? NULL : argv[1];
  43
  44         if (!cmd)
  45                 return cmd_usage(cmdtp);
  46         switch (*cmd) {
  47         case 'b':
  48                 return do_set_buffer(argc - 2, argv + 2);
  49         case 'p':
  50                 iotrace_set_enabled(0);
  51                 break;
  52         case 'r':
  53                 iotrace_set_enabled(1);
  54                 break;
  55         case 's':
  56                 do_print_stats();
  57                 break;
  58         default:
  59                 return CMD_RET_USAGE;
  60         }
  61
  62         return 0;
  63 }
  64
  65 U_BOOT_CMD(
  66         iotrace,        4,      1,      do_iotrace,
  67         "iotrace utility commands",
  68         "stats                        - display iotrace stats\n"
  69         "iotrace buffer <address> <size>      - set iotrace buffer\n"
  70         "iotrace pause                        - pause tracing\n"
  71         "iotrace resume                       - resume tracing"
  72 );