1/*- 2 * Copyright (c) 2011 NetApp, Inc. 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 NETAPP, INC ``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 NETAPP, INC 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 * $FreeBSD$ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <sys/types.h> 33 34#include "inout.h" 35 36/* 37 * EISA interrupt Level Control Register. 38 * 39 * This is a 16-bit register with one bit for each of the IRQ0 through IRQ15. 40 * A level triggered irq is indicated by setting the corresponding bit to '1'. 41 */ 42#define ELCR_PORT 0x4d0 43 44static uint8_t elcr[2] = { 0x00, 0x00 }; 45 46static int 47elcr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, 48 uint32_t *eax, void *arg) 49{ 50 int idx; 51 52 if (bytes != 1) 53 return (-1); 54 55 idx = port - ELCR_PORT; 56 57 if (in) 58 *eax = elcr[idx]; 59 else 60 elcr[idx] = *eax; 61 62 return (0); 63} 64INOUT_PORT(elcr, ELCR_PORT + 0, IOPORT_F_INOUT, elcr_handler); 65INOUT_PORT(elcr, ELCR_PORT + 1, IOPORT_F_INOUT, elcr_handler); 66