cmd/mp.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2008-2009 Freescale Semiconductor, Inc.
   4  */
   5
   6 #include <command.h>
   7 #include <cpu_func.h>
   8 #include <vsprintf.h>
   9
  10 static int cpu_status_all(void)
  11 {
  12         unsigned long cpuid;
  13
  14         for (cpuid = 0; ; cpuid++) {
  15                 if (!is_core_valid(cpuid)) {
  16                         if (cpuid == 0) {
  17                                 printf("Core num: %lu is not valid\n", cpuid);
  18                                 return 1;
  19                         }
  20                         break;
  21                 }
  22                 cpu_status(cpuid);
  23         }
  24
  25         return 0;
  26 }
  27
  28 static int
  29 cpu_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  30 {
  31         unsigned long cpuid;
  32
  33         if (argc == 2 && strncmp(argv[1], "status", 6) == 0)
  34                   return cpu_status_all();
  35
  36         if (argc < 3)
  37                 return CMD_RET_USAGE;
  38
  39         cpuid = dectoul(argv[1], NULL);
  40         if (!is_core_valid(cpuid)) {
  41                 printf ("Core num: %lu is not valid\n", cpuid);
  42                 return 1;
  43         }
  44
  45         if (argc == 3) {
  46                 if (strncmp(argv[2], "reset", 5) == 0)
  47                         cpu_reset(cpuid);
  48                 else if (strncmp(argv[2], "status", 6) == 0)
  49                         cpu_status(cpuid);
  50                 else if (strncmp(argv[2], "disable", 7) == 0)
  51                         return cpu_disable(cpuid);
  52                 else
  53                         return CMD_RET_USAGE;
  54
  55                 return 0;
  56         }
  57
  58         /* 4 or greater, make sure its release */
  59         if (strncmp(argv[2], "release", 7) != 0)
  60                 return CMD_RET_USAGE;
  61
  62         if (cpu_release(cpuid, argc - 3, argv + 3))
  63                 return CMD_RET_USAGE;
  64
  65         return 0;
  66 }
  67
  68 U_BOOT_LONGHELP(cpu,
  69             "<num> reset                 - Reset cpu <num>\n"
  70         "cpu status                      - Status of all cpus\n"
  71         "cpu <num> status                - Status of cpu <num>\n"
  72         "cpu <num> disable               - Disable cpu <num>\n"
  73         "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]"
  74 #ifdef CONFIG_PPC
  75         "\n"
  76         "                         [args] : <pir> <r3> <r6>\n" \
  77         "                                   pir - processor id (if writeable)\n" \
  78         "                                    r3 - value for gpr 3\n" \
  79         "                                    r6 - value for gpr 6\n" \
  80         "\n" \
  81         "     Use '-' for any arg if you want the default value.\n" \
  82         "     Default for r3 is <num> and r6 is 0\n" \
  83         "\n" \
  84         "     When cpu <num> is released r4 and r5 = 0.\n" \
  85         "     r7 will contain the size of the initial mapped area"
  86 #endif
  87         );
  88
  89 U_BOOT_CMD(
  90         cpu, CONFIG_SYS_MAXARGS, 1, cpu_cmd,
  91         "Multiprocessor CPU boot manipulation and release", cpu_help_text
  92 );