release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-mx25/mm.c

   1 /*
   2  *  Copyright (C) 1999,2000 Arm Limited
   3  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   4  *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
   5  *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
   6  *    - add MX31 specific definitions
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/mm.h>
  20 #include <linux/init.h>
  21 #include <linux/err.h>
  22
  23 #include <asm/pgtable.h>
  24 #include <asm/mach/map.h>
  25
  26 #include <mach/common.h>
  27 #include <mach/hardware.h>
  28 #include <mach/mx25.h>
  29 #include <mach/iomux-v3.h>
  30
  31 /*
  32  * This table defines static virtual address mappings for I/O regions.
  33  * These are the mappings common across all MX3 boards.
  34  */
  35 static struct map_desc mxc_io_desc[] __initdata = {
  36         {
  37                 .virtual        = MX25_AVIC_BASE_ADDR_VIRT,
  38                 .pfn            = __phys_to_pfn(MX25_AVIC_BASE_ADDR),
  39                 .length         = MX25_AVIC_SIZE,
  40                 .type           = MT_DEVICE_NONSHARED
  41         }, {
  42                 .virtual        = MX25_AIPS1_BASE_ADDR_VIRT,
  43                 .pfn            = __phys_to_pfn(MX25_AIPS1_BASE_ADDR),
  44                 .length         = MX25_AIPS1_SIZE,
  45                 .type           = MT_DEVICE_NONSHARED
  46         }, {
  47                 .virtual        = MX25_AIPS2_BASE_ADDR_VIRT,
  48                 .pfn            = __phys_to_pfn(MX25_AIPS2_BASE_ADDR),
  49                 .length         = MX25_AIPS2_SIZE,
  50                 .type           = MT_DEVICE_NONSHARED
  51         },
  52 };
  53
  54 /*
  55  * This function initializes the memory map. It is called during the
  56  * system startup to create static physical to virtual memory mappings
  57  * for the IO modules.
  58  */
  59 void __init mx25_map_io(void)
  60 {
  61         mxc_set_cpu_type(MXC_CPU_MX25);
  62         mxc_iomux_v3_init(MX25_IO_ADDRESS(MX25_IOMUXC_BASE_ADDR));
  63         mxc_arch_reset_init(MX25_IO_ADDRESS(MX25_WDOG_BASE_ADDR));
  64
  65         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  66 }
  67
  68 int imx25_register_gpios(void);
  69
  70 void __init mx25_init_irq(void)
  71 {
  72         mxc_init_irq((void __iomem *)MX25_AVIC_BASE_ADDR_VIRT);
  73         imx25_register_gpios();
  74 }