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kernel/linux-imx6_3.14.28/arch/arm/kernel/isa.c 1.62 KB
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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);
  }