target/linux/brcm47xx-2.6/files/arch/mips/bcm947xx/prom.c

   1 /*
   2  *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.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 as published by the
   6  *  Free Software Foundation;  either version 2 of the  License, or (at your
   7  *  option) any later version.
   8  *
   9  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  10  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  11  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  12  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  13  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  14  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  15  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  16  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  17  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  18  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  19  *
  20  *  You should have received a copy of the  GNU General Public License along
  21  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  22  *  675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  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/pmon.h>
  33 #include "../cfe/cfe_private.h"
  34
  35 const char *get_system_type(void)
  36 {
  37         return "Broadcom BCM47xx";
  38 }
  39
  40 void __init prom_init(void)
  41 {
  42         unsigned long mem;
  43
  44         mips_machgroup = MACH_GROUP_BRCM;
  45         mips_machtype = MACH_BCM47XX;
  46
  47         cfe_setup(fw_arg0, fw_arg1, fw_arg2, fw_arg3);
  48
  49         /* Figure out memory size by finding aliases */
  50         for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
  51                 if (*(unsigned long *)((unsigned long)(prom_init) + mem) ==
  52                     *(unsigned long *)(prom_init))
  53                         break;
  54         }
  55
  56         add_memory_region(0, mem, BOOT_MEM_RAM);
  57 }
  58
  59 unsigned long __init prom_free_prom_memory(void)
  60 {
  61         return 0;
  62 }