1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * linux/arch/arm/kernel/isa.c
5 * Copyright (C) 1999 Phil Blundell
7 * ISA shared memory and I/O port support, and is required to support
8 * iopl, inb, outb and friends in userspace via glibc emulation.
10 #include <linux/stddef.h>
11 #include <linux/types.h>
13 #include <linux/sysctl.h>
14 #include <linux/init.h>
17 static unsigned int isa_membase, isa_portbase, isa_portshift;
19 static struct ctl_table ctl_isa_vars[4] = {
21 .procname = "membase",
23 .maxlen = sizeof(isa_membase),
25 .proc_handler = proc_dointvec,
27 .procname = "portbase",
28 .data = &isa_portbase,
29 .maxlen = sizeof(isa_portbase),
31 .proc_handler = proc_dointvec,
33 .procname = "portshift",
34 .data = &isa_portshift,
35 .maxlen = sizeof(isa_portshift),
37 .proc_handler = proc_dointvec,
41 static struct ctl_table_header *isa_sysctl_header;
43 static struct ctl_table ctl_isa[2] = {
47 .child = ctl_isa_vars,
51 static struct ctl_table ctl_bus[2] = {
60 register_isa_ports(unsigned int membase, unsigned int portbase, unsigned int portshift)
62 isa_membase = membase;
63 isa_portbase = portbase;
64 isa_portshift = portshift;
65 isa_sysctl_header = register_sysctl_table(ctl_bus);