LXR linux/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
  32extern 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 */
  53static 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
  65void __init edb7211_map_io(void)
  66{
  67        clps711x_map_io();
  68        iotable_init(edb7211_io_desc, ARRAY_SIZE(edb7211_io_desc));
  69}
  70
  71