package/boot/uboot-mediatek/patches/230-cmd-add-pstore-check.patch

   1 --- a/cmd/pstore.c
   2 +++ b/cmd/pstore.c
   3 @@ -208,6 +208,58 @@ static int pstore_set(struct cmd_tbl *cm
   4  }
   5
   6  /**
   7 + * pstore_check() - Check for pstore records
   8 + * @cmdtp: Command data struct pointer
   9 + * @flag: Command flag
  10 + * @argc: Command-line argument count
  11 + * @argv: Array of command-line arguments
  12 + *
  13 + * Return: 0 if there are records in pstore, 1 otherwise
  14 + */
  15 +static int pstore_check(struct cmd_tbl *cmdtp, int flag,  int argc,
  16 +                       char * const argv[])
  17 +{
  18 +       phys_addr_t ptr;
  19 +       char *buffer;
  20 +       u32 size;
  21 +       int header_len = 0;
  22 +       bool compressed;
  23 +
  24 +       if (pstore_length == 0) {
  25 +               printf("Please set PStore configuration\n");
  26 +               return CMD_RET_USAGE;
  27 +       }
  28 +
  29 +       if (buffer_size == 0)
  30 +               pstore_init_buffer_size();
  31 +
  32 +       buffer = malloc_cache_aligned(buffer_size);
  33 +
  34 +       ptr = pstore_addr;
  35 +       phys_addr_t ptr_end = ptr + pstore_length - pstore_pmsg_size
  36 +                       - pstore_ftrace_size - pstore_console_size;
  37 +
  38 +       while (ptr < ptr_end) {
  39 +               size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
  40 +                                        pstore_record_size, buffer);
  41 +               ptr += pstore_record_size;
  42 +
  43 +               if (size == 0)
  44 +                       continue;
  45 +
  46 +               header_len = pstore_read_kmsg_hdr(buffer, &compressed);
  47 +               if (header_len == 0)
  48 +                       continue;
  49 +
  50 +               free(buffer);
  51 +               return 0;
  52 +       }
  53 +
  54 +       free(buffer);
  55 +       return 1;
  56 +}
  57 +
  58 +/**
  59   * pstore_print_buffer() - Print buffer
  60   * @type: buffer type
  61   * @buffer: buffer to print
  62 @@ -459,6 +511,7 @@ static int pstore_save(struct cmd_tbl *c
  63
  64  static struct cmd_tbl cmd_pstore_sub[] = {
  65         U_BOOT_CMD_MKENT(set, 8, 0, pstore_set, "", ""),
  66 +       U_BOOT_CMD_MKENT(check, 1, 0, pstore_check, "", ""),
  67         U_BOOT_CMD_MKENT(display, 3, 0, pstore_display, "", ""),
  68         U_BOOT_CMD_MKENT(save, 4, 0, pstore_save, "", ""),
  69  };
  70 @@ -566,6 +619,8 @@ U_BOOT_CMD(pstore, 10, 0, do_pstore,
  71            "  'pmsg-size' is the size of the user space logs record.\n"
  72            "  'ecc-size' enables/disables ECC support and specifies ECC buffer size in\n"
  73            "  bytes (0 disables it, 1 is a special value, means 16 bytes ECC).\n"
  74 +          "pstore check\n"
  75 +          "- Returns true if there are records in pstore.\n"
  76            "pstore display [record-type] [nb]\n"
  77            "- Display existing records in pstore reserved memory. A 'record-type' can\n"
  78            "  be given to only display records of this kind. 'record-type' can be one\n"