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 struct 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 struct ctl_table ctl_isa[2] = { 48 { 49 .procname = "isa", 50 .mode = 0555, 51 .child = ctl_isa_vars, 52 }, {} 53 }; 54 55 static struct 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 } 71