arch/mips/tx4938/toshiba_rbtx4938/prom.c

   1 /*
   2  * linux/arch/mips/tx4938/toshiba_rbtx4938/prom.c
   3  *
   4  * rbtx4938 specific prom routines
   5  * Copyright (C) 2000-2001 Toshiba Corporation
   6  *
   7  * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
   8  * terms of the GNU General Public License version 2. This program is
   9  * licensed "as is" without any warranty of any kind, whether express
  10  * or implied.
  11  *
  12  * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
  13  */
  14
  15 #include <linux/config.h>
  16 #include <linux/init.h>
  17 #include <linux/mm.h>
  18 #include <linux/sched.h>
  19 #include <linux/bootmem.h>
  20
  21 #include <asm/addrspace.h>
  22 #include <asm/bootinfo.h>
  23 #include <asm/tx4938/tx4938.h>
  24
  25 void __init prom_init_cmdline(void)
  26 {
  27         int argc = (int) fw_arg0;
  28         char **argv = (char **) fw_arg1;
  29         int i;
  30
  31         /* ignore all built-in args if any f/w args given */
  32         if (argc > 1) {
  33                 *arcs_cmdline = '\0';
  34         }
  35
  36         for (i = 1; i < argc; i++) {
  37                 if (i != 1) {
  38                         strcat(arcs_cmdline, " ");
  39                 }
  40                 strcat(arcs_cmdline, argv[i]);
  41         }
  42 }
  43
  44 void __init prom_init(void)
  45 {
  46         extern int tx4938_get_mem_size(void);
  47         int msize;
  48 #ifndef CONFIG_TX4938_NAND_BOOT
  49         prom_init_cmdline();
  50 #endif
  51         mips_machgroup = MACH_GROUP_TOSHIBA;
  52         mips_machtype = MACH_TOSHIBA_RBTX4938;
  53
  54         msize = tx4938_get_mem_size();
  55         add_memory_region(0, msize << 20, BOOT_MEM_RAM);
  56
  57         return;
  58 }
  59
  60 unsigned long  __init prom_free_prom_memory(void)
  61 {
  62         return 0;
  63 }
  64
  65 void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
  66 {
  67         return;
  68 }
  69
  70 const char *get_system_type(void)
  71 {
  72         return "Toshiba RBTX4938";
  73 }
  74
  75 char * __init prom_getcmdline(void)
  76 {
  77         return &(arcs_cmdline[0]);
  78 }