65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
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/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VMM_LAPIC_H_
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#define _VMM_LAPIC_H_
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struct vm;
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int lapic_write(struct vm *vm, int cpu, u_int offset, uint64_t val);
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int lapic_read(struct vm *vm, int cpu, u_int offset, uint64_t *retval);
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void lapic_timer_tick(struct vm *vm, int cpu);
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/*
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* Returns a vector between 32 and 255 if an interrupt is pending in the
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* IRR that can be delivered based on the current state of ISR and TPR.
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*
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* Note that the vector does not automatically transition to the ISR as a
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* result of calling this function.
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*
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* Returns -1 if there is no eligible vector that can be delivered to the
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* guest at this time.
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*/
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int lapic_pending_intr(struct vm *vm, int cpu);
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/*
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* Transition 'vector' from IRR to ISR. This function is called with the
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* vector returned by 'lapic_pending_intr()' when the guest is able to
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* accept this interrupt (i.e. RFLAGS.IF = 1 and no conditions exist that
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* block interrupt delivery).
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*/
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void lapic_intr_accepted(struct vm *vm, int cpu, int vector);
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/*
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* Signals to the LAPIC that an interrupt at 'vector' needs to be generated
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* to the 'cpu', the state is recorded in IRR.
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*/
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int lapic_set_intr(struct vm *vm, int cpu, int vector);
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#endif
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