98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*-
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* Copyright (c) 2014 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
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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 THE AUTHOR ``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 THE AUTHOR 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/cpuset.h>
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#include <sys/systm.h>
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#include <machine/vmm.h>
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#include "vatpic.h"
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#include "vatpit.h"
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#include "vmm_ioport.h"
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#define MAX_IOPORTS 1280
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ioport_handler_func_t ioport_handler[MAX_IOPORTS] = {
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[TIMER_MODE] = vatpit_handler,
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[TIMER_CNTR0] = vatpit_handler,
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[TIMER_CNTR1] = vatpit_handler,
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[TIMER_CNTR2] = vatpit_handler,
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[NMISC_PORT] = vatpit_nmisc_handler,
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[IO_ICU1] = vatpic_master_handler,
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[IO_ICU1 + ICU_IMR_OFFSET] = vatpic_master_handler,
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[IO_ICU2] = vatpic_slave_handler,
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[IO_ICU2 + ICU_IMR_OFFSET] = vatpic_slave_handler,
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[IO_ELCR1] = vatpic_elc_handler,
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[IO_ELCR2] = vatpic_elc_handler,
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};
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int
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emulate_ioport(struct vm *vm, int vcpuid, struct vm_exit *vmexit)
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{
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ioport_handler_func_t handler;
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uint32_t mask, val;
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int error;
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if (vmexit->u.inout.port >= MAX_IOPORTS)
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return (-1);
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handler = ioport_handler[vmexit->u.inout.port];
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if (handler == NULL)
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return (-1);
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switch (vmexit->u.inout.bytes) {
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case 1:
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mask = 0xff;
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break;
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case 2:
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mask = 0xffff;
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break;
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default:
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mask = 0xffffffff;
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break;
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}
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if (!vmexit->u.inout.in) {
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val = vmexit->u.inout.eax & mask;
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}
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error = (*handler)(vm, vcpuid, vmexit->u.inout.in,
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vmexit->u.inout.port, vmexit->u.inout.bytes, &val);
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if (!error && vmexit->u.inout.in) {
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vmexit->u.inout.eax &= ~mask;
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vmexit->u.inout.eax |= val & mask;
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}
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return (error);
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}
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