/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ #include <platforms.h> #include <mach/boolean.h> #include <mach/port.h> #include <kern/thread.h> #include <kern/task.h> #include <ipc/ipc_port.h> #include <ipc/ipc_space.h> #include <ipc/ipc_right.h> #include <ipc/ipc_object.h> #include <ipc/ipc_entry.h> #include <i386/thread.h> #include <i386/io_port.h> #include <i386/io_emulate.h> #include <i386/iopb_entries.h> #if 1 int emulate_io( __unused struct i386_saved_state *regs, __unused int opcode, __unused int io_port) { /* At the moment, we are not allowing I/O emulation * * FIXME - this should probably change due to * the Window Server's need to map I/O ports into its space. */ return EM_IO_ERROR; } #else int emulate_io( struct i386_saved_state *regs, int opcode, int io_port) { thread_t thread = current_thread(); at386_io_lock_state(); if (iopl_emulate(regs, opcode, io_port)) return EM_IO_DONE; if (iopb_check_mapping(thread, iopl_device)) return EM_IO_ERROR; /* * Check for send rights to the IOPL device port. */ if (iopl_device_port == IP_NULL) return EM_IO_ERROR; { ipc_space_t space = current_space(); mach_port_name_t name; ipc_entry_t entry; boolean_t has_rights = FALSE; ipc_entry_bits_t *capability; is_write_lock(space); assert(space->is_active); if (ipc_right_reverse(space, (ipc_object_t) iopl_device_port, &name, &entry, &capability)) { /* iopl_device_port is locked and active */ if (capability[space->server_id] & MACH_PORT_TYPE_SEND) has_rights = TRUE; ip_unlock(iopl_device_port); } is_write_unlock(space); if (!has_rights) { return EM_IO_ERROR; } } /* * Map the IOPL port set into the thread. */ if (i386_io_port_add(thread, iopl_device) != KERN_SUCCESS) return EM_IO_ERROR; /* * Make the thread use its IO_TSS to get the IO permissions; * it may not have had one before this. */ act_machine_switch_pcb(thread); return EM_IO_RETRY; } #endif