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

https://bitbucket.org/evzijst/gittest
C | 70 lines | 19 code | 8 blank | 43 comment | 0 complexity | 6d55a7951c4d7fd91043af929b79abce MD5 | raw file
 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