/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. */ #ifndef _SYS_MACHCLOCK_H #define _SYS_MACHCLOCK_H #ifdef __cplusplus extern "C" { #endif #ifdef _ASM /* * Macro to clear the NPT (non-privileged trap) bit in the %tick/%stick * register. Uses %g1-%g4. */ #define CLEARTICKNPT \ sethi %hi(cpu_clearticknpt), %g1; \ jmp %g1 + %lo(cpu_clearticknpt); \ rd %pc, %g4 #define RD_TICK_NO_SUSPEND_CHECK(out, scr1) \ rdpr %tick, out; \ sllx out, 1, out; \ srlx out, 1, out; #define RD_TICK(out, scr1, scr2, label) \ RD_TICK_NO_SUSPEND_CHECK(out, scr1); /* * These macros on sun4u read the %tick register, due to : * - %stick does not have enough precision, it's very low frequency * - %stick accesses are very slow on UltraSPARC IIe * Instead, consumers read %tick and scale it by the current stick/tick ratio. * This only works because all cpus in a system change clock ratios * synchronously and the changes are all initiated by the kernel. */ #define RD_CLOCK_TICK(out, scr1, scr2, label) \ /* CSTYLED */ \ RD_TICK(out,scr1,scr2,label) #define RD_CLOCK_TICK_NO_SUSPEND_CHECK(out, scr1) \ /* CSTYLED */ \ RD_TICK_NO_SUSPEND_CHECK(out,scr1) #endif /* _ASM */ #if defined(CPU_MODULE) /* * Constants used to convert hi-res timestamps into nanoseconds * (see <sys/clock.h> file for more information) */ #if defined(CHEETAH) || defined(HUMMINGBIRD) || defined(OLYMPUS_C) /* * At least 3.9MHz, for slower %stick-based systems. */ #define NSEC_SHIFT 8 #elif defined(SPITFIRE) /* * At least 62.5 MHz, for faster %tick-based systems. */ #define NSEC_SHIFT 4 #define VTRACE_SHIFT 4 #else #error "Compiling for CPU_MODULE but no CPU specified" #endif /* * NOTE: the macros below assume that the various time-related variables * (hrestime, hrestime_adj, hres_last_tick, timedelta, nsec_scale, etc) * are all stored together on a 64-byte boundary. The primary motivation * is cache performance, but we also take advantage of a convenient side * effect: these variables all have the same high 22 address bits, so only * one sethi is needed to access them all. */ /* * GET_HRESTIME() returns the value of hrestime, hrestime_adj and the * number of nanoseconds since the last clock tick ('nslt'). It also * sets 'nano' to the value NANOSEC (one billion). * * This macro assumes that all registers are globals or outs so they can * safely contain 64-bit data, and that it's safe to use the label "5:". * Further, this macro calls the NATIVE_TIME_TO_NSEC_SCALE which in turn * uses the labels "6:" and "7:"; labels "5:", "6:" and "7:" must not * be used across invocations of this macro. */ #define GET_HRESTIME(hrestsec, hrestnsec, adj, nslt, nano, scr, hrlock, \ gnt1, gnt2) \ 5: sethi %hi(hres_lock), scr; \ lduw [scr + %lo(hres_lock)], hrlock; /* load clock lock */ \ lduw [scr + %lo(nsec_scale)], nano; /* tick-to-ns factor */ \ andn hrlock, 1, hrlock; /* see comments above! */ \ ldx [scr + %lo(hres_last_tick)], nslt; \ ldn [scr + %lo(hrestime)], hrestsec; /* load hrestime.sec */\ add scr, %lo(hrestime), hrestnsec; \ ldn [hrestnsec + CLONGSIZE], hrestnsec; \ GET_NATIVE_TIME(adj, gnt1, gnt2); /* get current %tick */ \ subcc adj, nslt, nslt; /* nslt = ticks since last clockint */ \ movneg %xcc, %g0, nslt; /* ignore neg delta from tick skew */ \ ldx [scr + %lo(hrestime_adj)], adj; /* load hrestime_adj */ \ /* membar #LoadLoad; (see comment (2) above) */ \ lduw [scr + %lo(hres_lock)], scr; /* load clock lock */ \ NATIVE_TIME_TO_NSEC_SCALE(nslt, nano, gnt1, NSEC_SHIFT); \ sethi %hi(NANOSEC), nano; \ xor hrlock, scr, scr; \ /* CSTYLED */ \ brnz,pn scr, 5b; \ or nano, %lo(NANOSEC), nano; /* * Similar to above, but returns current gethrtime() value in 'base'. */ #define GET_HRTIME(base, now, nslt, scale, scr, hrlock, gnt1, gnt2) \ 5: sethi %hi(hres_lock), scr; \ lduw [scr + %lo(hres_lock)], hrlock; /* load clock lock */ \ lduw [scr + %lo(nsec_scale)], scale; /* tick-to-ns factor */ \ andn hrlock, 1, hrlock; /* see comments above! */ \ ldx [scr + %lo(hres_last_tick)], nslt; \ ldx [scr + %lo(hrtime_base)], base; /* load hrtime_base */ \ GET_NATIVE_TIME(now, gnt1, gnt2); /* get current %tick */ \ subcc now, nslt, nslt; /* nslt = ticks since last clockint */ \ movneg %xcc, %g0, nslt; /* ignore neg delta from tick skew */ \ /* membar #LoadLoad; (see comment (2) above) */ \ ld [scr + %lo(hres_lock)], scr; /* load clock lock */ \ NATIVE_TIME_TO_NSEC_SCALE(nslt, scale, gnt1, NSEC_SHIFT); \ xor hrlock, scr, scr; \ /* CSTYLED */ \ brnz,pn scr, 5b; \ add base, nslt, base; #endif /* CPU_MODULE */ #ifndef _ASM #ifdef _KERNEL /* * Hardware watchdog variables and knobs */ #define CLK_WATCHDOG_DEFAULT 10 /* 10 seconds */ extern int watchdog_enable; extern int watchdog_available; extern int watchdog_activated; extern uint_t watchdog_timeout_seconds; /* * tod module name and operations */ struct tod_ops { timestruc_t (*tod_get)(void); void (*tod_set)(timestruc_t); uint_t (*tod_set_watchdog_timer)(uint_t); uint_t (*tod_clear_watchdog_timer)(void); void (*tod_set_power_alarm)(timestruc_t); void (*tod_clear_power_alarm)(void); uint64_t (*tod_get_cpufrequency)(void); }; extern struct tod_ops tod_ops; extern char *tod_module_name; extern uint64_t gettick_counter(void); #define CLOCK_TICK_COUNTER() gettick_counter() /* * These defines allow common code to use TOD functions independant * of hardware platform. */ #define TODOP_GET(top) ((top).tod_get()) #define TODOP_SET(top, ts) ((top).tod_set(ts)) #define TODOP_SETWD(top, nsec) ((top).tod_set_watchdog_timer(nsec)) #define TODOP_CLRWD(top) ((top).tod_clear_watchdog_timer()) #define TODOP_SETWAKE(top, ts) ((top).tod_set_power_alarm(ts)) #define TODOP_CLRWAKE(top) ((top).tod_clear_power_alarm()) #endif /* _KERNEL */ #endif /* _ASM */ #ifdef __cplusplus } #endif #endif /* !_SYS_MACHCLOCK_H */
