arch/mips/jz4740/prom.c

   1 /*
   2  *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
   3  *  JZ4740 SoC prom code
   4  *
   5  *  This program is free software; you can redistribute it and/or modify it
   6  *  under  the terms of the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the License, or (at your
   8  *  option) any later version.
   9  *
  10  *  You should have received a copy of the GNU General Public License along
  11  *  with this program; if not, write to the Free Software Foundation, Inc.,
  12  *  675 Mass Ave, Cambridge, MA 02139, USA.
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/string.h>
  19
  20 #include <linux/serial_reg.h>
  21
  22 #include <asm/bootinfo.h>
  23 #include <asm/mach-jz4740/base.h>
  24
  25 static __init void jz4740_init_cmdline(int argc, char *argv[])
  26 {
  27         unsigned int count = COMMAND_LINE_SIZE - 1;
  28         int i;
  29         char *dst = &(arcs_cmdline[0]);
  30         char *src;
  31
  32         for (i = 1; i < argc && count; ++i) {
  33                 src = argv[i];
  34                 while (*src && count) {
  35                         *dst++ = *src++;
  36                         --count;
  37                 }
  38                 *dst++ = ' ';
  39         }
  40         if (i > 1)
  41                 --dst;
  42
  43         *dst = 0;
  44 }
  45
  46 void __init prom_init(void)
  47 {
  48         jz4740_init_cmdline((int)fw_arg0, (char **)fw_arg1);
  49         mips_machtype = MACH_INGENIC_JZ4740;
  50 }
  51
  52 void __init prom_free_prom_memory(void)
  53 {
  54 }