10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*5129Smarx * Common Development and Distribution License (the "License"). 6*5129Smarx * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 220Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 230Sstevel@tonic-gate /* All Rights Reserved */ 240Sstevel@tonic-gate 250Sstevel@tonic-gate /* 26*5129Smarx * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 270Sstevel@tonic-gate * Use is subject to license terms. 280Sstevel@tonic-gate */ 290Sstevel@tonic-gate 300Sstevel@tonic-gate #ifndef _SYS_PIT_H 310Sstevel@tonic-gate #define _SYS_PIT_H 320Sstevel@tonic-gate 330Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 340Sstevel@tonic-gate 350Sstevel@tonic-gate #ifdef __cplusplus 360Sstevel@tonic-gate extern "C" { 370Sstevel@tonic-gate #endif 380Sstevel@tonic-gate 390Sstevel@tonic-gate /* Definitions for 8254 Programmable Interrupt Timer ports on AT 386 */ 400Sstevel@tonic-gate #define PITCTR0_PORT 0x40 /* counter 0 port */ 410Sstevel@tonic-gate #define PITCTR1_PORT 0x41 /* counter 1 port */ 420Sstevel@tonic-gate #define PITCTR2_PORT 0x42 /* counter 2 port */ 430Sstevel@tonic-gate #define PITCTL_PORT 0x43 /* PIT control port */ 440Sstevel@tonic-gate #define PITAUX_PORT 0x61 /* PIT auxiliary port */ 450Sstevel@tonic-gate #define SANITY_CTR0 0x48 /* sanity timer counter */ 460Sstevel@tonic-gate #define SANITY_CTL 0x4B /* sanity control word */ 470Sstevel@tonic-gate #define SANITY_CHECK 0x461 /* bit 7 set if sanity timer went off */ 480Sstevel@tonic-gate #define FAILSAFE_NMI 0x80 /* to test if sanity timer went off */ 490Sstevel@tonic-gate #define ENABLE_SANITY 0x04 /* Enables sanity clock NMI ints */ 500Sstevel@tonic-gate #define RESET_SANITY 0x00 /* resets sanity NMI interrupt */ 510Sstevel@tonic-gate 520Sstevel@tonic-gate /* PIT Status Byte */ 530Sstevel@tonic-gate 540Sstevel@tonic-gate #define PITSTAT_OUTPUT 7 /* OUTPUT status bit */ 550Sstevel@tonic-gate #define PITSTAT_NULLCNT 6 /* NULL COUNT status bit */ 560Sstevel@tonic-gate 570Sstevel@tonic-gate /* Definitions for 8254 commands */ 580Sstevel@tonic-gate 590Sstevel@tonic-gate #define PIT_READBACK 0xc0 /* read-back command */ 600Sstevel@tonic-gate #define PIT_READBACKC0 0x02 /* enable read-back for counter 0 */ 610Sstevel@tonic-gate 620Sstevel@tonic-gate /* Following are used for Timer 0 */ 630Sstevel@tonic-gate #define PIT_C0 0x00 /* select counter 0 */ 640Sstevel@tonic-gate #define PIT_LOADMODE 0x30 /* load least significant byte */ 650Sstevel@tonic-gate /* followed by most significant byte */ 660Sstevel@tonic-gate #define PIT_NDIVMODE 0x04 /* divide by N counter */ 670Sstevel@tonic-gate #define PIT_SQUAREMODE 0x06 /* square-wave mode */ 680Sstevel@tonic-gate #define PIT_ENDSIGMODE 0x00 /* assert OUT at end-of-count mode */ 690Sstevel@tonic-gate 700Sstevel@tonic-gate /* Used for Timer 1. Used for delay calculations in countdown mode */ 710Sstevel@tonic-gate #define PIT_C1 0x40 /* select counter 1 */ 720Sstevel@tonic-gate #define PIT_READMODE 0x30 /* read or load least significant */ 730Sstevel@tonic-gate /* byte followed by most significant */ 740Sstevel@tonic-gate #define PIT_RATEMODE 0x06 /* square-wave mode for USART */ 750Sstevel@tonic-gate 76*5129Smarx #define PIT_C2 0x80 /* select counter 2 */ 770Sstevel@tonic-gate 780Sstevel@tonic-gate #define SANITY_NUM 0xFFFF /* Sanity timer fires every .2 secs */ 790Sstevel@tonic-gate /* bits used in auxiliary control port for timer 2 */ 800Sstevel@tonic-gate #define PITAUX_GATE2 0x01 /* aux port, PIT gate 2 input */ 810Sstevel@tonic-gate #define PITAUX_OUT2 0x02 /* aux port, PIT clock out 2 enable */ 820Sstevel@tonic-gate #define PIT_HZ 1193182 /* 8254's cycles per second */ 830Sstevel@tonic-gate 840Sstevel@tonic-gate #ifdef __cplusplus 850Sstevel@tonic-gate } 860Sstevel@tonic-gate #endif 870Sstevel@tonic-gate 880Sstevel@tonic-gate #endif /* _SYS_PIT_H */ 89