common/cmd_mp.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc.
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <common.h>
  24 #include <command.h>
  25
  26 int
  27 cpu_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  28 {
  29         unsigned long cpuid;
  30
  31         if (argc < 3) {
  32                 printf ("Usage:\n%s\n", cmdtp->usage);
  33                 return 1;
  34         }
  35
  36         cpuid = simple_strtoul(argv[1], NULL, 10);
  37         if (cpuid >= CONFIG_NR_CPUS) {
  38                 printf ("Core num: %d is out of range[0..%d]\n",
  39                                 cpuid, CONFIG_NR_CPUS - 1);
  40                 return 1;
  41         }
  42
  43
  44         if (argc == 3) {
  45                 if (strncmp(argv[2], "reset", 5) == 0) {
  46                         cpu_reset(cpuid);
  47                 } else if (strncmp(argv[2], "status", 6) == 0) {
  48                         cpu_status(cpuid);
  49                 } else {
  50                         printf ("Usage:\n%s\n", cmdtp->usage);
  51                         return 1;
  52                 }
  53                 return 0;
  54         }
  55
  56         /* 4 or greater, make sure its release */
  57         if (strncmp(argv[2], "release", 7) != 0) {
  58                 printf ("Usage:\n%s\n", cmdtp->usage);
  59                 return 1;
  60         }
  61
  62         if (cpu_release(cpuid, argc - 3, argv + 3)) {
  63                 printf ("Usage:\n%s\n", cmdtp->usage);
  64                 return 1;
  65         }
  66
  67         return 0;
  68 }
  69
  70 #ifdef CONFIG_PPC
  71 #define CPU_ARCH_HELP \
  72         "                         [args] : <pir> <r3> <r6>\n" \
  73         "                                   pir - processor id (if writeable)\n" \
  74         "                                    r3 - value for gpr 3\n" \
  75         "                                    r6 - value for gpr 6\n" \
  76         "\n" \
  77         "     Use '-' for any arg if you want the default value.\n" \
  78         "     Default for r3 is <num> and r6 is 0\n" \
  79         "\n" \
  80         "     When cpu <num> is released r4 and r5 = 0.\n" \
  81         "     r7 will contain the size of the initial mapped area\n"
  82 #endif
  83
  84 U_BOOT_CMD(
  85         cpu, CFG_MAXARGS, 1, cpu_cmd,
  86         "cpu     - Multiprocessor CPU boot manipulation and release\n",
  87             "<num> reset                 - Reset cpu <num>\n"
  88         "cpu <num> status                - Status of cpu <num>\n"
  89         "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]\n"
  90 #ifdef CPU_ARCH_HELP
  91         CPU_ARCH_HELP
  92 #endif
  93         );