common/cmd_mp.c

   1 /*
   2  * Copyright 2008-2009 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 * const argv[])
  28 {
  29         unsigned long cpuid;
  30
  31         if (argc < 3)
  32                 return cmd_usage(cmdtp);
  33
  34         cpuid = simple_strtoul(argv[1], NULL, 10);
  35         if (cpuid >= cpu_numcores()) {
  36                 printf ("Core num: %lu is out of range[0..%d]\n",
  37                                 cpuid, cpu_numcores() - 1);
  38                 return 1;
  39         }
  40
  41
  42         if (argc == 3) {
  43                 if (strncmp(argv[2], "reset", 5) == 0)
  44                         cpu_reset(cpuid);
  45                 else if (strncmp(argv[2], "status", 6) == 0)
  46                         cpu_status(cpuid);
  47                 else if (strncmp(argv[2], "disable", 7) == 0)
  48                         return cpu_disable(cpuid);
  49                 else
  50                         return cmd_usage(cmdtp);
  51
  52                 return 0;
  53         }
  54
  55         /* 4 or greater, make sure its release */
  56         if (strncmp(argv[2], "release", 7) != 0)
  57                 return cmd_usage(cmdtp);
  58
  59         if (cpu_release(cpuid, argc - 3, argv + 3))
  60                 return cmd_usage(cmdtp);
  61
  62         return 0;
  63 }
  64
  65 #ifdef CONFIG_PPC
  66 #define CPU_ARCH_HELP \
  67         "                         [args] : <pir> <r3> <r6>\n" \
  68         "                                   pir - processor id (if writeable)\n" \
  69         "                                    r3 - value for gpr 3\n" \
  70         "                                    r6 - value for gpr 6\n" \
  71         "\n" \
  72         "     Use '-' for any arg if you want the default value.\n" \
  73         "     Default for r3 is <num> and r6 is 0\n" \
  74         "\n" \
  75         "     When cpu <num> is released r4 and r5 = 0.\n" \
  76         "     r7 will contain the size of the initial mapped area"
  77 #endif
  78
  79 U_BOOT_CMD(
  80         cpu, CONFIG_SYS_MAXARGS, 1, cpu_cmd,
  81         "Multiprocessor CPU boot manipulation and release",
  82             "<num> reset                 - Reset cpu <num>\n"
  83         "cpu <num> status                - Status of cpu <num>\n"
  84         "cpu <num> disable               - Disable cpu <num>\n"
  85         "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]"
  86 #ifdef CPU_ARCH_HELP
  87         "\n"
  88         CPU_ARCH_HELP
  89 #endif
  90 );