arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_prom.c

   1 /*
   2  * rbtx4927 specific prom routines
   3  *
   4  * Author: MontaVista Software, Inc.
   5  *         source@mvista.com
   6  *
   7  * Copyright 2001-2002 MontaVista Software Inc.
   8  *
   9  * Copyright (C) 2004 MontaVista Software Inc.
  10  * Author: Manish Lachwani, mlachwani@mvista.com
  11  *
  12  *  This program is free software; you can redistribute it and/or modify it
  13  *  under the terms of the GNU General Public License as published by the
  14  *  Free Software Foundation; either version 2 of the License, or (at your
  15  *  option) any later version.
  16  *
  17  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  18  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  22  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  23  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  25  *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  26  *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  *  You should have received a copy of the GNU General Public License along
  29  *  with this program; if not, write to the Free Software Foundation, Inc.,
  30  *  675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32 #include <linux/init.h>
  33 #include <linux/mm.h>
  34 #include <linux/sched.h>
  35 #include <linux/bootmem.h>
  36
  37 #include <asm/addrspace.h>
  38 #include <asm/bootinfo.h>
  39 #include <asm/cpu.h>
  40 #include <asm/tx4927/tx4927.h>
  41
  42 void __init prom_init_cmdline(void)
  43 {
  44         int argc = (int) fw_arg0;
  45         char **argv = (char **) fw_arg1;
  46         int i;                  /* Always ignore the "-c" at argv[0] */
  47
  48         /* ignore all built-in args if any f/w args given */
  49         if (argc > 1) {
  50                 *arcs_cmdline = '\0';
  51         }
  52
  53         for (i = 1; i < argc; i++) {
  54                 if (i != 1) {
  55                         strcat(arcs_cmdline, " ");
  56                 }
  57                 strcat(arcs_cmdline, argv[i]);
  58         }
  59 }
  60
  61 void __init prom_init(void)
  62 {
  63         extern int tx4927_get_mem_size(void);
  64         extern char* toshiba_name;
  65         int msize;
  66
  67         prom_init_cmdline();
  68
  69         if ((read_c0_prid() & 0xff) == PRID_REV_TX4927) {
  70                 mips_machtype = MACH_TOSHIBA_RBTX4927;
  71                 toshiba_name  = "TX4927";
  72         } else {
  73                 mips_machtype = MACH_TOSHIBA_RBTX4937;
  74                 toshiba_name  = "TX4937";
  75         }
  76
  77         msize = tx4927_get_mem_size();
  78         add_memory_region(0, msize << 20, BOOT_MEM_RAM);
  79 }
  80
  81 void __init prom_free_prom_memory(void)
  82 {
  83 }
  84
  85 const char *get_system_type(void)
  86 {
  87         return "Toshiba RBTX4927/RBTX4937";
  88 }
  89
  90 char * __init prom_getcmdline(void)
  91 {
  92         return &(arcs_cmdline[0]);
  93 }
  94