1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 /* 25 * Copyright (c) 2010, Intel Corporation. 26 * All rights reserved. 27 * 28 * Copyright 2020 Joyent, Inc. 29 */ 30 31 #ifndef _SYS_APIC_TIMER_H 32 #define _SYS_APIC_TIMER_H 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 #include <sys/time.h> 39 40 #define IA32_DEADLINE_TSC_MSR 0x6E0 41 42 /* Timer Vector Table register */ 43 #define APIC_LOCAL_TIMER 0xc8 44 45 /* timer vector table */ 46 #define AV_PERIODIC 0x20000 /* Set timer mode to periodic */ 47 #define AV_DEADLINE 0x40000 /* Set timer mode to deadline */ 48 49 #define APIC_TIMER_MODE_ONESHOT 0x0 50 #define APIC_TIMER_MODE_PERIODIC 0x1 51 #define APIC_TIMER_MODE_DEADLINE 0x2 /* TSC-Deadline timer mode */ 52 53 extern int apic_oneshot; 54 extern uint_t apic_nsec_per_intr; 55 extern uint_t apic_hertz_count; 56 extern uint64_t apic_ticks_per_SFnsecs; 57 58 /* 59 * Use scaled-fixed-point arithmetic to calculate apic ticks. 60 * Round when dividing (by adding half of divisor to dividend) 61 * for one extra bit of precision. 62 */ 63 64 #define SF (1ULL<<20) /* Scaling Factor: scale by 2^20 */ 65 #define APIC_TICKS_TO_NSECS(ticks) ((((int64_t)(ticks) * SF) + \ 66 apic_ticks_per_SFnsecs / 2) / \ 67 apic_ticks_per_SFnsecs); 68 #define APIC_NSECS_TO_TICKS(nsecs) (((int64_t)(nsecs) * \ 69 apic_ticks_per_SFnsecs + (SF/2)) / SF) 70 71 extern int apic_timer_init(int); 72 extern void apic_timer_reprogram(hrtime_t); 73 extern void apic_timer_enable(void); 74 extern void apic_timer_disable(void); 75 76 extern hrtime_t apic_timer_stop_count(void); 77 extern void apic_timer_restart(hrtime_t); 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #endif /* _SYS_APIC_TIMER_H */ 84