arch/mips/ralink/prom.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify it
   3  *  under the terms of the GNU General Public License version 2 as published
   4  *  by the Free Software Foundation.
   5  *
   6  *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
   7  *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
   8  *  Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   9  */
  10
  11 #include <linux/string.h>
  12 #include <linux/of_fdt.h>
  13 #include <linux/of_platform.h>
  14
  15 #include <asm/bootinfo.h>
  16 #include <asm/addrspace.h>
  17
  18 #include "common.h"
  19
  20 struct ralink_soc_info soc_info;
  21
  22 const char *get_system_type(void)
  23 {
  24         return soc_info.sys_type;
  25 }
  26
  27 static __init void prom_init_cmdline(int argc, char **argv)
  28 {
  29         int i;
  30
  31         pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
  32                (unsigned int)fw_arg0, (unsigned int)fw_arg1,
  33                (unsigned int)fw_arg2, (unsigned int)fw_arg3);
  34
  35         argc = fw_arg0;
  36         argv = (char **) KSEG1ADDR(fw_arg1);
  37
  38         if (!argv) {
  39                 pr_debug("argv=%p is invalid, skipping\n",
  40                        argv);
  41                 return;
  42         }
  43
  44         for (i = 0; i < argc; i++) {
  45                 char *p = (char *) KSEG1ADDR(argv[i]);
  46
  47                 if (CPHYSADDR(p) && *p) {
  48                         pr_debug("argv[%d]: %s\n", i, p);
  49                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  50                         strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  51                 }
  52         }
  53 }
  54
  55 void __init prom_init(void)
  56 {
  57         int argc;
  58         char **argv;
  59
  60         prom_soc_init(&soc_info);
  61
  62         pr_info("SoC Type: %s\n", get_system_type());
  63
  64         prom_init_cmdline(argc, argv);
  65 }
  66
  67 void __init prom_free_prom_memory(void)
  68 {
  69 }