arch/mips/vr41xx/common/init.c

   1 /*
   2  *  init.c, Common initialization routines for NEC VR4100 series.
   3  *
   4  *  Copyright (C) 2003-2008  Yoichi Yuasa <yuasa@linux-mips.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <linux/init.h>
  21 #include <linux/ioport.h>
  22 #include <linux/irq.h>
  23 #include <linux/string.h>
  24
  25 #include <asm/bootinfo.h>
  26 #include <asm/time.h>
  27 #include <asm/vr41xx/irq.h>
  28 #include <asm/vr41xx/vr41xx.h>
  29
  30 #define IO_MEM_RESOURCE_START   0UL
  31 #define IO_MEM_RESOURCE_END     0x1fffffffUL
  32
  33 static void __init iomem_resource_init(void)
  34 {
  35         iomem_resource.start = IO_MEM_RESOURCE_START;
  36         iomem_resource.end = IO_MEM_RESOURCE_END;
  37 }
  38
  39 void __init plat_time_init(void)
  40 {
  41         unsigned long tclock;
  42
  43         vr41xx_calculate_clock_frequency();
  44
  45         tclock = vr41xx_get_tclock_frequency();
  46         if (current_cpu_data.processor_id == PRID_VR4131_REV2_0 ||
  47             current_cpu_data.processor_id == PRID_VR4131_REV2_1)
  48                 mips_hpt_frequency = tclock / 2;
  49         else
  50                 mips_hpt_frequency = tclock / 4;
  51 }
  52
  53 void __init plat_mem_setup(void)
  54 {
  55         iomem_resource_init();
  56
  57         vr41xx_siu_setup();
  58 }
  59
  60 void __init prom_init(void)
  61 {
  62         int argc, i;
  63         char **argv;
  64
  65         argc = fw_arg0;
  66         argv = (char **)fw_arg1;
  67
  68         for (i = 1; i < argc; i++) {
  69                 strcat(arcs_cmdline, argv[i]);
  70                 if (i < (argc - 1))
  71                         strcat(arcs_cmdline, " ");
  72         }
  73 }
  74
  75 void __init prom_free_prom_memory(void)
  76 {
  77 }