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	1	/*
	2	* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	#include <pexpert/pexpert.h>
	29	#include <pexpert/protos.h>
	30	#include <machine/machine_routines.h>
	31	#include <i386/lapic.h>
	32	#include <sys/kdebug.h>
	33
	34
	35	#if CONFIG_DTRACE && DEVELOPMENT
	36	#include <mach/sdt.h>
	37	#endif
	38
	39	void PE_incoming_interrupt(x86_saved_state_t *);
	40
	41
	42	struct i386_interrupt_handler {
	43	IOInterruptHandler handler;
	44	void *nub;
	45	void *target;
	46	void *refCon;
	47	};
	48
	49	typedef struct i386_interrupt_handler i386_interrupt_handler_t;
	50
	51	i386_interrupt_handler_t PE_interrupt_handler;
	52
	53
	54
	55	void
	56	PE_incoming_interrupt(x86_saved_state_t *state)
	57	{
	58	i386_interrupt_handler_t *vector;
	59	uint64_t rip;
	60	int interrupt;
	61	boolean_t user_mode = FALSE;
	62
	63	if (is_saved_state64(state) == TRUE) {
	64	x86_saved_state64_t *state64;
	65
	66	state64 = saved_state64(state);
	67	rip = state64->isf.rip;
	68	interrupt = state64->isf.trapno;
	69	user_mode = TRUE;
	70	} else {
	71	x86_saved_state32_t *state32;
	72
	73	state32 = saved_state32(state);
	74	if (state32->cs & 0x03)
	75	user_mode = TRUE;
	76	rip = state32->eip;
	77	interrupt = state32->trapno;
	78	}
	79
	80	KERNEL_DEBUG_CONSTANT(
	81	MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) \| DBG_FUNC_START,
	82	interrupt, (unsigned int)rip, user_mode, 0, 0);
	83
	84	vector = &PE_interrupt_handler;
	85
	86	#if CONFIG_DTRACE && DEVELOPMENT
	87	DTRACE_INT5(interrupt_start, void *, vector->nub, int, 0,
	88	void *, vector->target, IOInterruptHandler, vector->handler,
	89	void *, vector->refCon);
	90	#endif
	91
	92	if (!lapic_interrupt(interrupt, state)) {
	93	vector->handler(vector->target, NULL, vector->nub, interrupt);
	94	}
	95
	96	#if CONFIG_DTRACE && DEVELOPMENT
	97	DTRACE_INT5(interrupt_complete, void *, vector->nub, int, 0,
	98	void *, vector->target, IOInterruptHandler, vector->handler,
	99	void *, vector->refCon);
	100	#endif
	101
	102	KERNEL_DEBUG_CONSTANT(
	103	MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) \| DBG_FUNC_END,
	104	0, 0, 0, 0, 0);
	105	}
	106
	107	void PE_install_interrupt_handler(void *nub,
	108	__unused int source,
	109	void *target,
	110	IOInterruptHandler handler,
	111	void *refCon)
	112	{
	113	i386_interrupt_handler_t *vector;
	114
	115	vector = &PE_interrupt_handler;
	116
	117	/vector->source = source; IGNORED /
	118	vector->handler = handler;
	119	vector->nub = nub;
	120	vector->target = target;
	121	vector->refCon = refCon;
	122	}