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/init.h>
  16 #include <linux/mm.h>
  17 #include <linux/sched.h>
  18 #include <linux/bootmem.h>
  19
  20 #include <asm/addrspace.h>
  21 #include <asm/bootinfo.h>
  22 #include <asm/tx4938/tx4938.h>
  23
  24 void __init prom_init_cmdline(void)
  25 {
  26         int argc = (int) fw_arg0;
  27         char **argv = (char **) fw_arg1;
  28         int i;
  29
  30         /* ignore all built-in args if any f/w args given */
  31         if (argc > 1) {
  32                 *arcs_cmdline = '\0';
  33         }
  34
  35         for (i = 1; i < argc; i++) {
  36                 if (i != 1) {
  37                         strcat(arcs_cmdline, " ");
  38                 }
  39                 strcat(arcs_cmdline, argv[i]);
  40         }
  41 }
  42
  43 void __init prom_init(void)
  44 {
  45         extern int tx4938_get_mem_size(void);
  46         int msize;
  47 #ifndef CONFIG_TX4938_NAND_BOOT
  48         prom_init_cmdline();
  49 #endif
  50         mips_machgroup = MACH_GROUP_TOSHIBA;
  51         mips_machtype = MACH_TOSHIBA_RBTX4938;
  52
  53         msize = tx4938_get_mem_size();
  54         add_memory_region(0, msize << 20, BOOT_MEM_RAM);
  55
  56         return;
  57 }
  58
  59 unsigned long  __init prom_free_prom_memory(void)
  60 {
  61         return 0;
  62 }
  63
  64 void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
  65 {
  66         return;
  67 }
  68
  69 const char *get_system_type(void)
  70 {
  71         return "Toshiba RBTX4938";
  72 }
  73
  74 char * __init prom_getcmdline(void)
  75 {
  76         return &(arcs_cmdline[0]);
  77 }