LXR linux/arch/arm/kernel/isa.c

   1/*
   2 *  linux/arch/arm/kernel/isa.c
   3 *
   4 *  Copyright (C) 1999 Phil Blundell
   5 *
   6 * 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.
  10 *
  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.
  13 */
  14#include <linux/stddef.h>
  15#include <linux/types.h>
  16#include <linux/fs.h>
  17#include <linux/sysctl.h>
  18#include <linux/init.h>
  19#include <linux/io.h>
  20
  21static unsigned int isa_membase, isa_portbase, isa_portshift;
  22
  23static ctl_table ctl_isa_vars[4] = {
  24        {
  25                .procname       = "membase",
  26                .data           = &isa_membase, 
  27                .maxlen         = sizeof(isa_membase),
  28                .mode           = 0444,
  29                .proc_handler   = proc_dointvec,
  30        }, {
  31                .procname       = "portbase",
  32                .data           = &isa_portbase, 
  33                .maxlen         = sizeof(isa_portbase),
  34                .mode           = 0444,
  35                .proc_handler   = proc_dointvec,
  36        }, {
  37                .procname       = "portshift",
  38                .data           = &isa_portshift, 
  39                .maxlen         = sizeof(isa_portshift),
  40                .mode           = 0444,
  41                .proc_handler   = proc_dointvec,
  42        }, {}
  43};
  44
  45static struct ctl_table_header *isa_sysctl_header;
  46
  47static ctl_table ctl_isa[2] = {
  48        {
  49                .procname       = "isa",
  50                .mode           = 0555,
  51                .child          = ctl_isa_vars,
  52        }, {}
  53};
  54
  55static ctl_table ctl_bus[2] = {
  56        {
  57                .procname       = "bus",
  58                .mode           = 0555,
  59                .child          = ctl_isa,
  60        }, {}
  61};
  62
  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;
  69        isa_sysctl_header = register_sysctl_table(ctl_bus);
  70}
  71