release/src-rt-6.x/linux/linux-2.6/arch/mips/vr41xx/common/init.c

   1 /*
   2  *  init.c, Common initialization routines for NEC VR4100 series.
   3  *
   4  *  Copyright (C) 2003-2005  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
   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 static void __init setup_timer_frequency(void)
  40 {
  41         unsigned long tclock;
  42
  43         tclock = vr41xx_get_tclock_frequency();
  44         if (current_cpu_data.processor_id == PRID_VR4131_REV2_0 ||
  45             current_cpu_data.processor_id == PRID_VR4131_REV2_1)
  46                 mips_hpt_frequency = tclock / 2;
  47         else
  48                 mips_hpt_frequency = tclock / 4;
  49 }
  50
  51 void __init plat_timer_setup(struct irqaction *irq)
  52 {
  53         setup_irq(TIMER_IRQ, irq);
  54 }
  55
  56 static void __init timer_init(void)
  57 {
  58         board_time_init = setup_timer_frequency;
  59 }
  60
  61 void __init plat_mem_setup(void)
  62 {
  63         vr41xx_calculate_clock_frequency();
  64
  65         timer_init();
  66         iomem_resource_init();
  67 }
  68
  69 void __init prom_init(void)
  70 {
  71         int argc, i;
  72         char **argv;
  73
  74         argc = fw_arg0;
  75         argv = (char **)fw_arg1;
  76
  77         for (i = 1; i < argc; i++) {
  78                 strcat(arcs_cmdline, argv[i]);
  79                 if (i < (argc - 1))
  80                         strcat(arcs_cmdline, " ");
  81         }
  82 }
  83
  84 void __init prom_free_prom_memory(void)
  85 {
  86 }