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
  21 static unsigned int isa_membase, isa_portbase, isa_portshift;
  22
  23 static 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
  45 static struct ctl_table_header *isa_sysctl_header;
  46
  47 static ctl_table ctl_isa[2] = {
  48         {
  49                 .procname       = "isa",
  50                 .mode           = 0555,
  51                 .child          = ctl_isa_vars,
  52         }, {}
  53 };
  54
  55 static ctl_table ctl_bus[2] = {
  56         {
  57                 .procname       = "bus",
  58                 .mode           = 0555,
  59                 .child          = ctl_isa,
  60         }, {}
  61 };
  62
  63 void __init
  64 register_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 }