arch/mips/ralink/prom.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
   6  *  Copyright (C) 2013 John Crispin <john@phrozen.org>
   7  */
   8
   9 #include <linux/string.h>
  10
  11 #include <asm/bootinfo.h>
  12 #include <asm/addrspace.h>
  13
  14 #include <asm/mach-ralink/ralink_regs.h>
  15
  16 #include "common.h"
  17
  18 struct ralink_soc_info soc_info;
  19
  20 enum ralink_soc_type ralink_soc;
  21 EXPORT_SYMBOL_GPL(ralink_soc);
  22
  23 const char *get_system_type(void)
  24 {
  25         return soc_info.sys_type;
  26 }
  27
  28 static __init void prom_init_cmdline(void)
  29 {
  30         int argc;
  31         char **argv;
  32         int i;
  33
  34         pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
  35                (unsigned int)fw_arg0, (unsigned int)fw_arg1,
  36                (unsigned int)fw_arg2, (unsigned int)fw_arg3);
  37
  38         argc = fw_arg0;
  39         argv = (char **) KSEG1ADDR(fw_arg1);
  40
  41         if (!argv) {
  42                 pr_debug("argv=%p is invalid, skipping\n",
  43                        argv);
  44                 return;
  45         }
  46
  47         for (i = 0; i < argc; i++) {
  48                 char *p = (char *) KSEG1ADDR(argv[i]);
  49
  50                 if (CPHYSADDR(p) && *p) {
  51                         pr_debug("argv[%d]: %s\n", i, p);
  52                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  53                         strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  54                 }
  55         }
  56 }
  57
  58 void __init prom_init(void)
  59 {
  60         prom_soc_init(&soc_info);
  61
  62         pr_info("SoC Type: %s\n", get_system_type());
  63
  64         prom_init_cmdline();
  65 }