kernel/2.6.29.6-aldebaran-rt/arch/arm/mach-mx2/generic.c

   1 /*
   2  * generic.c
   3  *
   4  * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18  * MA 02110-1301, USA.
  19  */
  20
  21 #include <linux/mm.h>
  22 #include <linux/init.h>
  23 #include <mach/hardware.h>
  24 #include <asm/pgtable.h>
  25 #include <asm/mach/map.h>
  26
  27 /* MX27 memory map definition */
  28 static struct map_desc mxc_io_desc[] __initdata = {
  29         /*
  30          * this fixed mapping covers:
  31          * - AIPI1
  32          * - AIPI2
  33          * - AITC
  34          * - ROM Patch
  35          * - and some reserved space
  36          */
  37         {
  38                 .virtual = AIPI_BASE_ADDR_VIRT,
  39                 .pfn = __phys_to_pfn(AIPI_BASE_ADDR),
  40                 .length = AIPI_SIZE,
  41                 .type = MT_DEVICE
  42         },
  43         /*
  44          * this fixed mapping covers:
  45          * - CSI
  46          * - ATA
  47          */
  48         {
  49                 .virtual = SAHB1_BASE_ADDR_VIRT,
  50                 .pfn = __phys_to_pfn(SAHB1_BASE_ADDR),
  51                 .length = SAHB1_SIZE,
  52                 .type = MT_DEVICE
  53         },
  54         /*
  55          * this fixed mapping covers:
  56          * - EMI
  57          */
  58         {
  59                 .virtual = X_MEMC_BASE_ADDR_VIRT,
  60                 .pfn = __phys_to_pfn(X_MEMC_BASE_ADDR),
  61                 .length = X_MEMC_SIZE,
  62                 .type = MT_DEVICE
  63         }
  64 };
  65
  66 /*
  67  * Initialize the memory map. It is called during the
  68  * system startup to create static physical to virtual
  69  * memory map for the IO modules.
  70  */
  71 void __init mxc_map_io(void)
  72 {
  73         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  74 }