linux/arch/mips/ralink/prom.c
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   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#include <linux/of_fdt.h>
  11#include <linux/of_platform.h>
  12
  13#include <asm/bootinfo.h>
  14#include <asm/addrspace.h>
  15
  16#include <asm/mach-ralink/ralink_regs.h>
  17
  18#include "common.h"
  19
  20struct ralink_soc_info soc_info;
  21
  22enum ralink_soc_type ralink_soc;
  23EXPORT_SYMBOL_GPL(ralink_soc);
  24
  25const char *get_system_type(void)
  26{
  27        return soc_info.sys_type;
  28}
  29
  30static __init void prom_init_cmdline(void)
  31{
  32        int argc;
  33        char **argv;
  34        int i;
  35
  36        pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
  37               (unsigned int)fw_arg0, (unsigned int)fw_arg1,
  38               (unsigned int)fw_arg2, (unsigned int)fw_arg3);
  39
  40        argc = fw_arg0;
  41        argv = (char **) KSEG1ADDR(fw_arg1);
  42
  43        if (!argv) {
  44                pr_debug("argv=%p is invalid, skipping\n",
  45                       argv);
  46                return;
  47        }
  48
  49        for (i = 0; i < argc; i++) {
  50                char *p = (char *) KSEG1ADDR(argv[i]);
  51
  52                if (CPHYSADDR(p) && *p) {
  53                        pr_debug("argv[%d]: %s\n", i, p);
  54                        strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  55                        strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  56                }
  57        }
  58}
  59
  60void __init prom_init(void)
  61{
  62        prom_soc_init(&soc_info);
  63
  64        pr_info("SoC Type: %s\n", get_system_type());
  65
  66        prom_init_cmdline();
  67}
  68