arch/mips/au1000/db1x00/init.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      PB1000 board setup
   4  *
   5  * Copyright 2001 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  15  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  16  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  17  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  18  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  20  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  22  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  *  You should have received a copy of the  GNU General Public License along
  26  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  27  *  675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30 #include <linux/init.h>
  31 #include <linux/mm.h>
  32 #include <linux/sched.h>
  33 #include <linux/bootmem.h>
  34 #include <asm/addrspace.h>
  35 #include <asm/bootinfo.h>
  36 #include <linux/config.h>
  37 #include <linux/string.h>
  38 #include <linux/kernel.h>
  39
  40 int prom_argc;
  41 char **prom_argv, **prom_envp;
  42 extern void  __init prom_init_cmdline(void);
  43 extern char *prom_getenv(char *envname);
  44
  45 const char *get_system_type(void)
  46 {
  47 #ifdef CONFIG_MIPS_BOSPORUS
  48         return "Alchemy Bosporus Gateway Reference";
  49 #else
  50         return "Alchemy Db1x00";
  51 #endif
  52 }
  53
  54 void __init prom_init(void)
  55 {
  56         unsigned char *memsize_str;
  57         unsigned long memsize;
  58
  59         prom_argc = fw_arg0;
  60         prom_argv = (char **) fw_arg1;
  61         prom_envp = (char **) fw_arg2;
  62
  63         mips_machgroup = MACH_GROUP_ALCHEMY;
  64         mips_machtype = MACH_DB1000;    /* set the platform # */
  65
  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         add_memory_region(0, memsize, BOOT_MEM_RAM);
  74 }