1*0e751525SEric Saxe /* 2*0e751525SEric Saxe * CDDL HEADER START 3*0e751525SEric Saxe * 4*0e751525SEric Saxe * The contents of this file are subject to the terms of the 5*0e751525SEric Saxe * Common Development and Distribution License (the "License"). 6*0e751525SEric Saxe * You may not use this file except in compliance with the License. 7*0e751525SEric Saxe * 8*0e751525SEric Saxe * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*0e751525SEric Saxe * or http://www.opensolaris.org/os/licensing. 10*0e751525SEric Saxe * See the License for the specific language governing permissions 11*0e751525SEric Saxe * and limitations under the License. 12*0e751525SEric Saxe * 13*0e751525SEric Saxe * When distributing Covered Code, include this CDDL HEADER in each 14*0e751525SEric Saxe * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*0e751525SEric Saxe * If applicable, add the following below this CDDL HEADER, with the 16*0e751525SEric Saxe * fields enclosed by brackets "[]" replaced with your own identifying 17*0e751525SEric Saxe * information: Portions Copyright [yyyy] [name of copyright owner] 18*0e751525SEric Saxe * 19*0e751525SEric Saxe * CDDL HEADER END 20*0e751525SEric Saxe */ 21*0e751525SEric Saxe /* 22*0e751525SEric Saxe * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23*0e751525SEric Saxe * Use is subject to license terms. 24*0e751525SEric Saxe */ 25*0e751525SEric Saxe 26*0e751525SEric Saxe #ifndef _HPET_H 27*0e751525SEric Saxe #define _HPET_H 28*0e751525SEric Saxe 29*0e751525SEric Saxe #include <sys/hpet_acpi.h> 30*0e751525SEric Saxe 31*0e751525SEric Saxe /* 32*0e751525SEric Saxe * Interface for HPET access. 33*0e751525SEric Saxe */ 34*0e751525SEric Saxe 35*0e751525SEric Saxe #ifdef __cplusplus 36*0e751525SEric Saxe extern "C" { 37*0e751525SEric Saxe #endif 38*0e751525SEric Saxe 39*0e751525SEric Saxe /* 40*0e751525SEric Saxe * HPET_INFINITY is used for timers that will never expire. 41*0e751525SEric Saxe */ 42*0e751525SEric Saxe #define HPET_INFINITY (INT64_MAX) 43*0e751525SEric Saxe 44*0e751525SEric Saxe /* 45*0e751525SEric Saxe * State of initialization. 46*0e751525SEric Saxe */ 47*0e751525SEric Saxe #define HPET_NO_SUPPORT (0) 48*0e751525SEric Saxe #define HPET_TIMER_SUPPORT (1) /* supports main counter reads */ 49*0e751525SEric Saxe #define HPET_INTERRUPT_SUPPORT (2) /* supports interrupt/timer */ 50*0e751525SEric Saxe #define HPET_FULL_SUPPORT (3) /* supports counter and timer intr */ 51*0e751525SEric Saxe 52*0e751525SEric Saxe typedef struct hpet { 53*0e751525SEric Saxe uint_t supported; 54*0e751525SEric Saxe boolean_t (*install_proxy)(void); 55*0e751525SEric Saxe boolean_t (*callback)(int); 56*0e751525SEric Saxe /* 57*0e751525SEric Saxe * Next two function pointers allow CPUs to use the HPET's timer 58*0e751525SEric Saxe * as a proxy for their LAPIC timers which stop during Deep C-State. 59*0e751525SEric Saxe */ 60*0e751525SEric Saxe boolean_t (*use_hpet_timer)(hrtime_t *); 61*0e751525SEric Saxe void (*use_lapic_timer)(hrtime_t); 62*0e751525SEric Saxe } hpet_t; 63*0e751525SEric Saxe 64*0e751525SEric Saxe #define CST_EVENT_MULTIPLE_CSTATES (128) /* callbacks for _CST changes */ 65*0e751525SEric Saxe #define CST_EVENT_ONE_CSTATE (129) 66*0e751525SEric Saxe 67*0e751525SEric Saxe /* 68*0e751525SEric Saxe * unix access to the HPET is done through the hpet structure. 69*0e751525SEric Saxe */ 70*0e751525SEric Saxe extern hpet_t hpet; 71*0e751525SEric Saxe 72*0e751525SEric Saxe int hpet_acpi_init(int *hpet_vect, iflag_t *hpet_flags); 73*0e751525SEric Saxe void hpet_acpi_fini(void); 74*0e751525SEric Saxe uint32_t hpet_proxy_ipl(void); 75*0e751525SEric Saxe 76*0e751525SEric Saxe #ifdef __cplusplus 77*0e751525SEric Saxe } 78*0e751525SEric Saxe #endif 79*0e751525SEric Saxe 80*0e751525SEric Saxe #endif /* _HPET_H */ 81