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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/arch/arm/kernel/isa.c
3 *
4 * Copyright (C) 1999 Phil Blundell
5 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * 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
9 * 2 of the License, or (at your option) any later version.
Russell King7034b0e2006-08-28 12:44:03 +010010 *
11 * ISA shared memory and I/O port support, and is required to support
12 * iopl, inb, outb and friends in userspace via glibc emulation.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/stddef.h>
15#include <linux/types.h>
16#include <linux/fs.h>
17#include <linux/sysctl.h>
18#include <linux/init.h>
Ben Dooks87e0d6c2009-01-08 15:42:40 +000019#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
21static unsigned int isa_membase, isa_portbase, isa_portshift;
22
23static ctl_table ctl_isa_vars[4] = {
Russell King7034b0e2006-08-28 12:44:03 +010024 {
Russell King7034b0e2006-08-28 12:44:03 +010025 .procname = "membase",
26 .data = &isa_membase,
27 .maxlen = sizeof(isa_membase),
28 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -080029 .proc_handler = proc_dointvec,
Russell King7034b0e2006-08-28 12:44:03 +010030 }, {
Russell King7034b0e2006-08-28 12:44:03 +010031 .procname = "portbase",
32 .data = &isa_portbase,
33 .maxlen = sizeof(isa_portbase),
34 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -080035 .proc_handler = proc_dointvec,
Russell King7034b0e2006-08-28 12:44:03 +010036 }, {
Russell King7034b0e2006-08-28 12:44:03 +010037 .procname = "portshift",
38 .data = &isa_portshift,
39 .maxlen = sizeof(isa_portshift),
40 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -080041 .proc_handler = proc_dointvec,
Eric W. Biederman50469612009-04-03 05:11:21 -070042 }, {}
Linus Torvalds1da177e2005-04-16 15:20:36 -070043};
44
45static struct ctl_table_header *isa_sysctl_header;
46
Russell King7034b0e2006-08-28 12:44:03 +010047static ctl_table ctl_isa[2] = {
48 {
Russell King7034b0e2006-08-28 12:44:03 +010049 .procname = "isa",
50 .mode = 0555,
51 .child = ctl_isa_vars,
Eric W. Biederman50469612009-04-03 05:11:21 -070052 }, {}
Russell King7034b0e2006-08-28 12:44:03 +010053};
54
55static ctl_table ctl_bus[2] = {
56 {
Russell King7034b0e2006-08-28 12:44:03 +010057 .procname = "bus",
58 .mode = 0555,
59 .child = ctl_isa,
Eric W. Biederman50469612009-04-03 05:11:21 -070060 }, {}
Russell King7034b0e2006-08-28 12:44:03 +010061};
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63void __init
64register_isa_ports(unsigned int membase, unsigned int portbase, unsigned int portshift)
65{
66 isa_membase = membase;
67 isa_portbase = portbase;
68 isa_portshift = portshift;
Eric W. Biederman0b4d4142007-02-14 00:34:09 -080069 isa_sysctl_header = register_sysctl_table(ctl_bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070}