cmd/iotrace.c

   1 /*
   2  * Copyright (c) 2014 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <iotrace.h>
  10
  11 static void do_print_stats(void)
  12 {
  13         ulong start, size, offset, count;
  14
  15         printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis");
  16         iotrace_get_buffer(&start, &size, &offset, &count);
  17         printf("Start:  %08lx\n", start);
  18         printf("Size:   %08lx\n", size);
  19         printf("Offset: %08lx\n", offset);
  20         printf("Output: %08lx\n", start + offset);
  21         printf("Count:  %08lx\n", count);
  22         printf("CRC32:  %08lx\n", (ulong)iotrace_get_checksum());
  23 }
  24
  25 static int do_set_buffer(int argc, char * const argv[])
  26 {
  27         ulong addr = 0, size = 0;
  28
  29         if (argc == 2) {
  30                 addr = simple_strtoul(*argv++, NULL, 16);
  31                 size = simple_strtoul(*argv++, NULL, 16);
  32         } else if (argc != 0) {
  33                 return CMD_RET_USAGE;
  34         }
  35
  36         iotrace_set_buffer(addr, size);
  37
  38         return 0;
  39 }
  40
  41 int do_iotrace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  42 {
  43         const char *cmd = argc < 2 ? NULL : argv[1];
  44
  45         if (!cmd)
  46                 return cmd_usage(cmdtp);
  47         switch (*cmd) {
  48         case 'b':
  49                 return do_set_buffer(argc - 2, argv + 2);
  50         case 'p':
  51                 iotrace_set_enabled(0);
  52                 break;
  53         case 'r':
  54                 iotrace_set_enabled(1);
  55                 break;
  56         case 's':
  57                 do_print_stats();
  58                 break;
  59         default:
  60                 return CMD_RET_USAGE;
  61         }
  62
  63         return 0;
  64 }
  65
  66 U_BOOT_CMD(
  67         iotrace,        4,      1,      do_iotrace,
  68         "iotrace utility commands",
  69         "stats                        - display iotrace stats\n"
  70         "iotrace buffer <address> <size>      - set iotrace buffer\n"
  71         "iotrace pause                        - pause tracing\n"
  72         "iotrace resume                       - resume tracing"
  73 );