target/linux/ramips/patches-3.8/0004-MIPS-ralink-adds-prom-and-cmdline-code.patch

   1 From 7e47cefa69c8ed2c889522ce29fcce73ce8cf08e Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sun, 20 Jan 2013 22:01:05 +0100
   4 Subject: [PATCH 04/14] MIPS: ralink: adds prom and cmdline code
   5
   6 Add minimal code to handle commandlines.
   7
   8 Signed-off-by: John Crispin <blogic@openwrt.org>
   9 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  10 Patchwork: http://patchwork.linux-mips.org/patch/4892/
  11 ---
  12  arch/mips/ralink/prom.c |   69 +++++++++++++++++++++++++++++++++++++++++++++++
  13  1 file changed, 69 insertions(+)
  14  create mode 100644 arch/mips/ralink/prom.c
  15
  16 --- /dev/null
  17 +++ b/arch/mips/ralink/prom.c
  18 @@ -0,0 +1,69 @@
  19 +/*
  20 + *  This program is free software; you can redistribute it and/or modify it
  21 + *  under the terms of the GNU General Public License version 2 as published
  22 + *  by the Free Software Foundation.
  23 + *
  24 + *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
  25 + *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
  26 + *  Copyright (C) 2013 John Crispin <blogic@openwrt.org>
  27 + */
  28 +
  29 +#include <linux/string.h>
  30 +#include <linux/of_fdt.h>
  31 +#include <linux/of_platform.h>
  32 +
  33 +#include <asm/bootinfo.h>
  34 +#include <asm/addrspace.h>
  35 +
  36 +#include "common.h"
  37 +
  38 +struct ralink_soc_info soc_info;
  39 +
  40 +const char *get_system_type(void)
  41 +{
  42 +       return soc_info.sys_type;
  43 +}
  44 +
  45 +static __init void prom_init_cmdline(int argc, char **argv)
  46 +{
  47 +       int i;
  48 +
  49 +       pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
  50 +              (unsigned int)fw_arg0, (unsigned int)fw_arg1,
  51 +              (unsigned int)fw_arg2, (unsigned int)fw_arg3);
  52 +
  53 +       argc = fw_arg0;
  54 +       argv = (char **) KSEG1ADDR(fw_arg1);
  55 +
  56 +       if (!argv) {
  57 +               pr_debug("argv=%p is invalid, skipping\n",
  58 +                      argv);
  59 +               return;
  60 +       }
  61 +
  62 +       for (i = 0; i < argc; i++) {
  63 +               char *p = (char *) KSEG1ADDR(argv[i]);
  64 +
  65 +               if (CPHYSADDR(p) && *p) {
  66 +                       pr_debug("argv[%d]: %s\n", i, p);
  67 +                       strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  68 +                       strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  69 +               }
  70 +       }
  71 +}
  72 +
  73 +void __init prom_init(void)
  74 +{
  75 +       int argc;
  76 +       char **argv;
  77 +
  78 +       prom_soc_init(&soc_info);
  79 +
  80 +       pr_info("SoC Type: %s\n", get_system_type());
  81 +
  82 +       prom_init_cmdline(argc, argv);
  83 +}
  84 +
  85 +void __init prom_free_prom_memory(void)
  86 +{
  87 +}