arch/mips/emma2rh/common/prom.c

   1 /*
   2  *  arch/mips/emma2rh/common/prom.c
   3  *      This file is prom file.
   4  *
   5  *  Copyright (C) NEC Electronics Corporation 2004-2006
   6  *
   7  *  This file is based on the arch/mips/ddb5xxx/common/prom.c
   8  *
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25 #include <linux/init.h>
  26 #include <linux/mm.h>
  27 #include <linux/sched.h>
  28 #include <linux/bootmem.h>
  29
  30 #include <asm/addrspace.h>
  31 #include <asm/bootinfo.h>
  32 #include <asm/emma2rh/emma2rh.h>
  33 #include <asm/debug.h>
  34
  35 const char *get_system_type(void)
  36 {
  37         switch (mips_machtype) {
  38         case MACH_NEC_MARKEINS:
  39                 return "NEC EMMA2RH Mark-eins";
  40         default:
  41                 return "Unknown NEC board";
  42         }
  43 }
  44
  45 /* [jsun@junsun.net] PMON passes arguments in C main() style */
  46 void __init prom_init(void)
  47 {
  48         int argc = fw_arg0;
  49         char **arg = (char **)fw_arg1;
  50         int i;
  51
  52         /* if user passes kernel args, ignore the default one */
  53         if (argc > 1)
  54                 arcs_cmdline[0] = '\0';
  55
  56         /* arg[0] is "g", the rest is boot parameters */
  57         for (i = 1; i < argc; i++) {
  58                 if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
  59                     >= sizeof(arcs_cmdline))
  60                         break;
  61                 strcat(arcs_cmdline, arg[i]);
  62                 strcat(arcs_cmdline, " ");
  63         }
  64
  65 #if defined(CONFIG_MARKEINS)
  66         mips_machtype = MACH_NEC_MARKEINS;
  67         add_memory_region(0, EMMA2RH_RAM_SIZE, BOOT_MEM_RAM);
  68 #endif
  69
  70 }
  71
  72 void __init prom_free_prom_memory(void)
  73 {
  74 }