arch/mips/kernel/mips_machine.c

   1 /*
   2  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   3  *
   4  *  This program is free software; you can redistribute it and/or modify it
   5  *  under the terms of the GNU General Public License version 2 as published
   6  *  by the Free Software Foundation.
   7  *
   8  */
   9 #include <linux/mm.h>
  10 #include <linux/string.h>
  11 #include <linux/slab.h>
  12
  13 #include <asm/mips_machine.h>
  14
  15 static struct mips_machine *mips_machine __initdata;
  16 static char *mips_machine_name = "Unknown";
  17
  18 #define for_each_machine(mach) \
  19         for ((mach) = (struct mips_machine *)&__mips_machines_start; \
  20              (mach) && \
  21              (unsigned long)(mach) < (unsigned long)&__mips_machines_end; \
  22              (mach)++)
  23
  24 __init void mips_set_machine_name(const char *name)
  25 {
  26         char *p;
  27
  28         if (name == NULL)
  29                 return;
  30
  31         p = kstrdup(name, GFP_KERNEL);
  32         if (!p)
  33                 pr_err("MIPS: no memory for machine_name\n");
  34
  35         mips_machine_name = p;
  36 }
  37
  38 char *mips_get_machine_name(void)
  39 {
  40         return mips_machine_name;
  41 }
  42
  43 __init int mips_machtype_setup(char *id)
  44 {
  45         struct mips_machine *mach;
  46
  47         for_each_machine(mach) {
  48                 if (mach->mach_id == NULL)
  49                         continue;
  50
  51                 if (strcmp(mach->mach_id, id) == 0) {
  52                         mips_machtype = mach->mach_type;
  53                         return 0;
  54                 }
  55         }
  56
  57         pr_err("MIPS: no machine found for id '%s', supported machines:\n", id);
  58         pr_err("%-24s %s\n", "id", "name");
  59         for_each_machine(mach)
  60                 pr_err("%-24s %s\n", mach->mach_id, mach->mach_name);
  61
  62         return 1;
  63 }
  64
  65 __setup("machtype=", mips_machtype_setup);
  66
  67 __init void mips_machine_setup(void)
  68 {
  69         struct mips_machine *mach;
  70
  71         for_each_machine(mach) {
  72                 if (mips_machtype == mach->mach_type) {
  73                         mips_machine = mach;
  74                         break;
  75                 }
  76         }
  77
  78         if (!mips_machine)
  79                 return;
  80
  81         mips_set_machine_name(mips_machine->mach_name);
  82         pr_info("MIPS: machine is %s\n", mips_machine_name);
  83
  84         if (mips_machine->mach_setup)
  85                 mips_machine->mach_setup();
  86 }