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isa.c

/*
 *  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>

static unsigned int isa_membase, isa_portbase, isa_portshift;

static ctl_table ctl_isa_vars[4] = {
      {
            .ctl_name   = BUS_ISA_MEM_BASE,
            .procname   = "membase",
            .data       = &isa_membase, 
            .maxlen           = sizeof(isa_membase),
            .mode       = 0444,
            .proc_handler     = &proc_dointvec,
      }, {
            .ctl_name   = BUS_ISA_PORT_BASE,
            .procname   = "portbase",
            .data       = &isa_portbase, 
            .maxlen           = sizeof(isa_portbase),
            .mode       = 0444,
            .proc_handler     = &proc_dointvec,
      }, {
            .ctl_name   = BUS_ISA_PORT_SHIFT,
            .procname   = "portshift",
            .data       = &isa_portshift, 
            .maxlen           = sizeof(isa_portshift),
            .mode       = 0444,
            .proc_handler     = &proc_dointvec,
      }, {0}
};

static struct ctl_table_header *isa_sysctl_header;

static ctl_table ctl_isa[2] = {
      {
            .ctl_name   = CTL_BUS_ISA,
            .procname   = "isa",
            .mode       = 0555,
            .child            = ctl_isa_vars,
      }, {0}
};

static ctl_table ctl_bus[2] = {
      {
            .ctl_name   = CTL_BUS,
            .procname   = "bus",
            .mode       = 0555,
            .child            = ctl_isa,
      }, {0}
};

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);
}

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