common/cmd_mp.c

   1 /*
   2  * Copyright 2008-2009 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9
  10 static int
  11 cpu_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  12 {
  13         unsigned long cpuid;
  14
  15         if (argc < 3)
  16                 return CMD_RET_USAGE;
  17
  18         cpuid = simple_strtoul(argv[1], NULL, 10);
  19         if (!is_core_valid(cpuid)) {
  20                 printf ("Core num: %lu is not valid\n", cpuid);
  21                 return 1;
  22         }
  23
  24
  25         if (argc == 3) {
  26                 if (strncmp(argv[2], "reset", 5) == 0)
  27                         cpu_reset(cpuid);
  28                 else if (strncmp(argv[2], "status", 6) == 0)
  29                         cpu_status(cpuid);
  30                 else if (strncmp(argv[2], "disable", 7) == 0)
  31                         return cpu_disable(cpuid);
  32                 else
  33                         return CMD_RET_USAGE;
  34
  35                 return 0;
  36         }
  37
  38         /* 4 or greater, make sure its release */
  39         if (strncmp(argv[2], "release", 7) != 0)
  40                 return CMD_RET_USAGE;
  41
  42         if (cpu_release(cpuid, argc - 3, argv + 3))
  43                 return CMD_RET_USAGE;
  44
  45         return 0;
  46 }
  47
  48 #ifdef CONFIG_SYS_LONGHELP
  49 static char cpu_help_text[] =
  50             "<num> reset                 - Reset cpu <num>\n"
  51         "cpu <num> status                - Status of cpu <num>\n"
  52         "cpu <num> disable               - Disable cpu <num>\n"
  53         "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]"
  54 #ifdef CONFIG_PPC
  55         "\n"
  56         "                         [args] : <pir> <r3> <r6>\n" \
  57         "                                   pir - processor id (if writeable)\n" \
  58         "                                    r3 - value for gpr 3\n" \
  59         "                                    r6 - value for gpr 6\n" \
  60         "\n" \
  61         "     Use '-' for any arg if you want the default value.\n" \
  62         "     Default for r3 is <num> and r6 is 0\n" \
  63         "\n" \
  64         "     When cpu <num> is released r4 and r5 = 0.\n" \
  65         "     r7 will contain the size of the initial mapped area"
  66 #endif
  67         "";
  68 #endif
  69
  70 U_BOOT_CMD(
  71         cpu, CONFIG_SYS_MAXARGS, 1, cpu_cmd,
  72         "Multiprocessor CPU boot manipulation and release", cpu_help_text
  73 );