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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_CLOCK_H 27 #define _SYS_CLOCK_H 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 #ifdef _KERNEL 34 35 #ifndef _ASM 36 37 #include <sys/psw.h> 38 #include <sys/time.h> 39 #include <sys/processor.h> 40 #if defined(__GNUC__) && defined(_ASM_INLINES) 41 #include <asm/clock.h> 42 #endif 43 #include <sys/machclock.h> 44 45 extern time_t ggmtl(void); 46 extern void sgmtl(time_t); 47 extern void rtcsync(void); 48 49 extern void unlock_hres_lock(void); 50 extern void hres_tick(void); 51 extern void (*hrtime_tick)(void); 52 53 #ifndef __xpv 54 extern void tsc_hrtimeinit(uint64_t cpu_freq_hz); 55 extern void tsc_sync_master(processorid_t); 56 extern void tsc_sync_slave(void); 57 #endif 58 59 /* 60 * Careful: this can always return zero on some systems. Use the system hrtime 61 * routines if you want a meaningful time. 62 */ 63 extern hrtime_t tsc_read(void); 64 65 extern hrtime_t __rdtsc_insn(void); 66 67 extern int tsc_gethrtime_enable; 68 69 #define ADJ_SHIFT 4 /* used in get_hrestime */ 70 71 #define YRBASE 00 /* 1900 - what year 0 in chip represents */ 72 73 #endif /* !_ASM */ 74 75 #define CBE_HIGH_PIL 14 76 #define CBE_LOCK_PIL LOCK_LEVEL 77 #define CBE_LOW_PIL 2 78 79 /* 80 * CLOCK_LOCK() sets the LSB (bit 0) of the hres_lock. The rest of the 81 * 31bits are used as the counter. This lock is acquired 82 * around "hrestime" and "timedelta". This lock is acquired to make 83 * sure that level-14 accounts for changes to this variable in that 84 * interrupt itself. The level-14 interrupt code also acquires this 85 * lock. 86 * (Note: It is assumed that the lock_set_spl() uses only bit 0 of the lock.) 87 * 88 * CLOCK_UNLOCK() increments the lower bytes straight, thus clearing the 89 * lock and also incrementing the counter. This way gethrtime() 90 * can figure out if the value in the lock got changed or not. 91 */ 92 #define HRES_LOCK_OFFSET 0 /* byte 0 has the lock bit(bit 0 in the byte) */ 93 94 #define CLOCK_LOCK(oldsplp) \ 95 lock_set_spl((lock_t *)&hres_lock + HRES_LOCK_OFFSET, \ 96 ipltospl(XC_HI_PIL), oldsplp) 97 98 #define CLOCK_UNLOCK(spl) \ 99 unlock_hres_lock(); \ 100 splx(spl); \ 101 LOCKSTAT_RECORD0(LS_CLOCK_UNLOCK_RELEASE, \ 102 (lock_t *)&hres_lock + HRES_LOCK_OFFSET); 103 104 #endif /* KERNEL */ 105 106 #ifdef __cplusplus 107 } 108 #endif 109 110 #endif /* _SYS_CLOCK_H */ 111