arch/mips/au1000/hydrogen3/init.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      PB1000 board setup
   5  *
   6  * Copyright 2001 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ppopov@mvista.com or source@mvista.com
   9  *
  10  *  This program is free software; you can redistribute  it and/or modify it
  11  *  under  the terms of  the GNU General  Public License as published by the
  12  *  Free Software Foundation;  either version 2 of the  License, or (at your
  13  *  option) any later version.
  14  *
  15  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  16  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  17  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  18  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  19  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  21  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  22  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  23  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  *  You should have received a copy of the  GNU General Public License along
  27  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  28  *  675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/init.h>
  32 #include <linux/mm.h>
  33 #include <linux/sched.h>
  34 #include <linux/bootmem.h>
  35 #include <asm/addrspace.h>
  36 #include <asm/bootinfo.h>
  37 #include <linux/config.h>
  38 #include <linux/string.h>
  39 #include <linux/kernel.h>
  40
  41 int prom_argc;
  42 char **prom_argv, **prom_envp;
  43 extern void  __init prom_init_cmdline(void);
  44 extern char *prom_getenv(char *envname);
  45
  46 const char *get_system_type(void)
  47 {
  48 #ifdef CONFIG_MIPS_BOSPORUS
  49         return "Alchemy Bosporus Gateway Reference";
  50 #else
  51         return "Alchemy Db1x00";
  52 #endif
  53 }
  54
  55 int __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
  56 {
  57         unsigned char *memsize_str;
  58         unsigned long memsize;
  59
  60         prom_argc = argc;
  61         prom_argv = argv;
  62         prom_envp = envp;
  63
  64         mips_machgroup = MACH_GROUP_ALCHEMY;
  65         mips_machtype = MACH_DB1000;    /* set the platform # */
  66         prom_init_cmdline();
  67
  68         memsize_str = prom_getenv("memsize");
  69         if (!memsize_str) {
  70                 memsize = 0x04000000;
  71         } else {
  72                 memsize = simple_strtol(memsize_str, NULL, 0);
  73         }
  74         add_memory_region(0, memsize, BOOT_MEM_RAM);
  75         return 0;
  76 }