arch/arm/mach-clps711x/edb7211-mm.c

   1 /*
   2  *  linux/arch/arm/mach-clps711x/mm.c
   3  *
   4  *  Extra MM routines for the EDB7211 board
   5  *
   6  *  Copyright (C) 2000, 2001 Blue Mug, Inc.  All Rights Reserved.
   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 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24
  25 #include <asm/hardware.h>
  26 #include <asm/page.h>
  27 #include <asm/pgtable.h>
  28 #include <asm/sizes.h>
  29
  30 #include <asm/mach/map.h>
  31
  32 extern void clps711x_map_io(void);
  33
  34 /*
  35  * The on-chip registers are given a size of 1MB so that a section can
  36  * be used to map them; this saves a page table.  This is the place to
  37  * add mappings for ROM, expansion memory, PCMCIA, etc.  (if static
  38  * mappings are chosen for those areas).
  39  *
  40  * Here is a physical memory map (to be fleshed out later):
  41  *
  42  * Physical Address  Size  Description
  43  * ----------------- ----- ---------------------------------
  44  * c0000000-c001ffff 128KB reserved for video RAM [1]
  45  * c0020000-c0023fff  16KB parameters (see Documentation/arm/Setup)
  46  * c0024000-c0027fff  16KB swapper_pg_dir (task 0 page directory)
  47  * c0028000-...            kernel image (TEXTADDR)
  48  *
  49  * [1] Unused pages should be given back to the VM; they are not yet.
  50  *     The parameter block should also be released (not sure if this
  51  *     happens).
  52  */
  53 static struct map_desc edb7211_io_desc[] __initdata = {
  54  /* virtual, physical, length, type */
  55
  56  /* memory-mapped extra keyboard row and CS8900A Ethernet chip */
  57  { EP7211_VIRT_EXTKBD,  EP7211_PHYS_EXTKBD,  SZ_1M, MT_DEVICE },
  58  { EP7211_VIRT_CS8900A, EP7211_PHYS_CS8900A, SZ_1M, MT_DEVICE },
  59
  60  /* flash banks */
  61  { EP7211_VIRT_FLASH1,  EP7211_PHYS_FLASH1,  SZ_8M, MT_DEVICE },
  62  { EP7211_VIRT_FLASH2,  EP7211_PHYS_FLASH2,  SZ_8M, MT_DEVICE }
  63 };
  64
  65 void __init edb7211_map_io(void)
  66 {
  67         clps711x_map_io();
  68         iotable_init(edb7211_io_desc, ARRAY_SIZE(edb7211_io_desc));
  69 }
  70