isa.c

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/*
 *  linux/arch/arm/kernel/isa.c
 *
 *  Copyright (C) 1999 Phil Blundell
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 *  ISA shared memory and I/O port support, and is required to support
 *  iopl, inb, outb and friends in userspace via glibc emulation.
 */
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <linux/io.h>

static unsigned int isa_membase, isa_portbase, isa_portshift;

static ctl_table ctl_isa_vars[4] = {
    {
        .procname   = "membase",
        .data       = &isa_membase, 
        .maxlen     = sizeof(isa_membase),
        .mode       = 0444,
        .proc_handler   = proc_dointvec,
    }, {
        .procname   = "portbase",
        .data       = &isa_portbase, 
        .maxlen     = sizeof(isa_portbase),
        .mode       = 0444,
        .proc_handler   = proc_dointvec,
    }, {
        .procname   = "portshift",
        .data       = &isa_portshift, 
        .maxlen     = sizeof(isa_portshift),
        .mode       = 0444,
        .proc_handler   = proc_dointvec,
    }, {}
};

static struct ctl_table_header *isa_sysctl_header;

static ctl_table ctl_isa[2] = {
    {
        .procname   = "isa",
        .mode       = 0555,
        .child      = ctl_isa_vars,
    }, {}
};

static ctl_table ctl_bus[2] = {
    {
        .procname   = "bus",
        .mode       = 0555,
        .child      = ctl_isa,
    }, {}
};

void __init
register_isa_ports(unsigned int membase, unsigned int portbase, unsigned int portshift)
{
    isa_membase = membase;
    isa_portbase = portbase;
    isa_portshift = portshift;
    isa_sysctl_header = register_sysctl_table(ctl_bus);
}