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  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <linux/mm.h>
  24 #include <linux/init.h>
  25 #include <linux/err.h>
  26
  27 #include <asm/pgtable.h>
  28 #include <asm/mach/map.h>
  29
  30 #include <mach/common.h>
  31 #include <mach/hardware.h>
  32 #include <mach/mx25.h>
  33 #include <mach/iomux-v3.h>
  34
  35 /*
  36  * This table defines static virtual address mappings for I/O regions.
  37  * These are the mappings common across all MX3 boards.
  38  */
  39 static struct map_desc mxc_io_desc[] __initdata = {
  40         {
  41                 .virtual        = MX25_AVIC_BASE_ADDR_VIRT,
  42                 .pfn            = __phys_to_pfn(MX25_AVIC_BASE_ADDR),
  43                 .length         = MX25_AVIC_SIZE,
  44                 .type           = MT_DEVICE_NONSHARED
  45         }, {
  46                 .virtual        = MX25_AIPS1_BASE_ADDR_VIRT,
  47                 .pfn            = __phys_to_pfn(MX25_AIPS1_BASE_ADDR),
  48                 .length         = MX25_AIPS1_SIZE,
  49                 .type           = MT_DEVICE_NONSHARED
  50         }, {
  51                 .virtual        = MX25_AIPS2_BASE_ADDR_VIRT,
  52                 .pfn            = __phys_to_pfn(MX25_AIPS2_BASE_ADDR),
  53                 .length         = MX25_AIPS2_SIZE,
  54                 .type           = MT_DEVICE_NONSHARED
  55         },
  56 };
  57
  58 /*
  59  * This function initializes the memory map. It is called during the
  60  * system startup to create static physical to virtual memory mappings
  61  * for the IO modules.
  62  */
  63 void __init mx25_map_io(void)
  64 {
  65         mxc_set_cpu_type(MXC_CPU_MX25);
  66         mxc_iomux_v3_init(MX25_IO_ADDRESS(MX25_IOMUXC_BASE_ADDR));
  67         mxc_arch_reset_init(MX25_IO_ADDRESS(MX25_WDOG_BASE_ADDR));
  68
  69         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  70 }
  71
  72 void __init mx25_init_irq(void)
  73 {
  74         mxc_init_irq((void __iomem *)MX25_AVIC_BASE_ADDR_VIRT);
  75 }
  76