pe_interrupt.c   [plain text]

/*
 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
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 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
#include <pexpert/pexpert.h>
#include <pexpert/protos.h>
#include <machine/machine_routines.h>
#include <i386/mp.h>
#include <sys/kdebug.h>


#if CONFIG_DTRACE && DEVELOPMENT
#include <mach/sdt.h>
#endif

void PE_incoming_interrupt(x86_saved_state_t *);


struct i386_interrupt_handler {
	IOInterruptHandler	handler;
	void			*nub;
	void			*target;
	void			*refCon;
};

typedef struct i386_interrupt_handler i386_interrupt_handler_t;

i386_interrupt_handler_t	PE_interrupt_handler;



void
PE_incoming_interrupt(x86_saved_state_t *state)
{
	i386_interrupt_handler_t	*vector;
	uint64_t			rip;
	int				interrupt;
	boolean_t			user_mode = FALSE;

        if (is_saved_state64(state) == TRUE) {
	        x86_saved_state64_t	*state64;

	        state64 = saved_state64(state);
		rip = state64->isf.rip;
		interrupt = state64->isf.trapno;
		user_mode = TRUE;
	} else {
		x86_saved_state32_t	*state32;

		state32 = saved_state32(state);
		if (state32->cs & 0x03)
			user_mode = TRUE;
		rip = state32->eip;
		interrupt = state32->trapno;
	}

	KERNEL_DEBUG_CONSTANT(
		MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
		interrupt, (unsigned int)rip, user_mode, 0, 0);

	vector = &PE_interrupt_handler;

#if CONFIG_DTRACE && DEVELOPMENT
            DTRACE_INT5(interrupt_start, void *, vector->nub, int, 0, 
                        void *, vector->target, IOInterruptHandler, vector->handler,
                        void *, vector->refCon);
#endif

	if (!lapic_interrupt(interrupt, state)) {
		vector->handler(vector->target, NULL, vector->nub, interrupt);
	}

#if CONFIG_DTRACE && DEVELOPMENT
            DTRACE_INT5(interrupt_complete, void *, vector->nub, int, 0, 
                        void *, vector->target, IOInterruptHandler, vector->handler,
                        void *, vector->refCon);
#endif

	KERNEL_DEBUG_CONSTANT(
		MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
	   0, 0, 0, 0, 0);
}

void PE_install_interrupt_handler(void *nub,
				  __unused int source,
				  void *target,
				  IOInterruptHandler handler,
				  void *refCon)
{
	i386_interrupt_handler_t	*vector;

	vector = &PE_interrupt_handler;

	/*vector->source = source; IGNORED */
	vector->handler = handler;
	vector->nub = nub;
	vector->target = target;
	vector->refCon = refCon;
}