1 /*- 2 * Copyright (c) 2014 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/types.h> 32 #include <sys/queue.h> 33 #include <sys/cpuset.h> 34 #include <sys/systm.h> 35 36 #include <machine/vmm.h> 37 38 #include "vatpic.h" 39 #include "vatpit.h" 40 #include "vmm_ioport.h" 41 42 #define MAX_IOPORTS 1280 43 44 ioport_handler_func_t ioport_handler[MAX_IOPORTS] = { 45 [TIMER_MODE] = vatpit_handler, 46 [TIMER_CNTR0] = vatpit_handler, 47 [TIMER_CNTR1] = vatpit_handler, 48 [TIMER_CNTR2] = vatpit_handler, 49 [NMISC_PORT] = vatpit_nmisc_handler, 50 [IO_ICU1] = vatpic_master_handler, 51 [IO_ICU1 + ICU_IMR_OFFSET] = vatpic_master_handler, 52 [IO_ICU2] = vatpic_slave_handler, 53 [IO_ICU2 + ICU_IMR_OFFSET] = vatpic_slave_handler, 54 [IO_ELCR1] = vatpic_elc_handler, 55 [IO_ELCR2] = vatpic_elc_handler, 56 }; 57 58 int 59 emulate_ioport(struct vm *vm, int vcpuid, struct vm_exit *vmexit) 60 { 61 ioport_handler_func_t handler; 62 uint32_t mask, val; 63 int error; 64 65 if (vmexit->u.inout.port >= MAX_IOPORTS) 66 return (-1); 67 68 handler = ioport_handler[vmexit->u.inout.port]; 69 if (handler == NULL) 70 return (-1); 71 72 if (!vmexit->u.inout.in) { 73 switch (vmexit->u.inout.bytes) { 74 case 1: 75 mask = 0xff; 76 break; 77 case 2: 78 mask = 0xffff; 79 break; 80 default: 81 mask = 0xffffffff; 82 break; 83 } 84 val = vmexit->u.inout.eax & mask; 85 } 86 87 error = (*handler)(vm, vcpuid, vmexit->u.inout.in, 88 vmexit->u.inout.port, vmexit->u.inout.bytes, &val); 89 90 if (!error && vmexit->u.inout.in) { 91 switch (vmexit->u.inout.bytes) { 92 case 1: 93 mask = 0xff; 94 break; 95 case 2: 96 mask = 0xffff; 97 break; 98 default: 99 mask = 0xffffffff; 100 break; 101 } 102 vmexit->u.inout.eax &= ~mask; 103 vmexit->u.inout.eax |= val & mask; 104 } 105 106 return (error); 107 } 108