cmd/mp.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2008-2009 Freescale Semiconductor, Inc.
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8 #include <cpu_func.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
  46         if (argc == 3) {
  47                 if (strncmp(argv[2], "reset", 5) == 0)
  48                         cpu_reset(cpuid);
  49                 else if (strncmp(argv[2], "status", 6) == 0)
  50                         cpu_status(cpuid);
  51                 else if (strncmp(argv[2], "disable", 7) == 0)
  52                         return cpu_disable(cpuid);
  53                 else
  54                         return CMD_RET_USAGE;
  55
  56                 return 0;
  57         }
  58
  59         /* 4 or greater, make sure its release */
  60         if (strncmp(argv[2], "release", 7) != 0)
  61                 return CMD_RET_USAGE;
  62
  63         if (cpu_release(cpuid, argc - 3, argv + 3))
  64                 return CMD_RET_USAGE;
  65
  66         return 0;
  67 }
  68
  69 #ifdef CONFIG_SYS_LONGHELP
  70 static char cpu_help_text[] =
  71             "<num> reset                 - Reset cpu <num>\n"
  72         "cpu status                      - Status of all cpus\n"
  73         "cpu <num> status                - Status of cpu <num>\n"
  74         "cpu <num> disable               - Disable cpu <num>\n"
  75         "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]"
  76 #ifdef CONFIG_PPC
  77         "\n"
  78         "                         [args] : <pir> <r3> <r6>\n" \
  79         "                                   pir - processor id (if writeable)\n" \
  80         "                                    r3 - value for gpr 3\n" \
  81         "                                    r6 - value for gpr 6\n" \
  82         "\n" \
  83         "     Use '-' for any arg if you want the default value.\n" \
  84         "     Default for r3 is <num> and r6 is 0\n" \
  85         "\n" \
  86         "     When cpu <num> is released r4 and r5 = 0.\n" \
  87         "     r7 will contain the size of the initial mapped area"
  88 #endif
  89         "";
  90 #endif
  91
  92 U_BOOT_CMD(
  93         cpu, CONFIG_SYS_MAXARGS, 1, cpu_cmd,
  94         "Multiprocessor CPU boot manipulation and release", cpu_help_text
  95 );