| tsc.c (223211) | tsc.c (223426) |
|---|---|
| 1/*- 2 * Copyright (c) 1998-2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1998-2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
| 28__FBSDID("$FreeBSD: head/sys/x86/x86/tsc.c 223211 2011-06-17 21:41:06Z jkim $"); | 28__FBSDID("$FreeBSD: head/sys/x86/x86/tsc.c 223426 2011-06-22 16:40:45Z jkim $"); |
| 29 30#include "opt_clock.h" 31 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/cpu.h> 35#include <sys/limits.h> 36#include <sys/malloc.h> --- 402 unchanged lines hidden (view full) --- 439 */ 440 if (power_pm_get_type() == POWER_PM_TYPE_APM) { 441 tsc_timecounter.tc_quality = -1000; 442 if (bootverbose) 443 printf("TSC timecounter disabled: APM enabled.\n"); 444 goto init; 445 } 446 | 29 30#include "opt_clock.h" 31 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/cpu.h> 35#include <sys/limits.h> 36#include <sys/malloc.h> --- 402 unchanged lines hidden (view full) --- 439 */ 440 if (power_pm_get_type() == POWER_PM_TYPE_APM) { 441 tsc_timecounter.tc_quality = -1000; 442 if (bootverbose) 443 printf("TSC timecounter disabled: APM enabled.\n"); 444 goto init; 445 } 446 |
| 447 /* 448 * We cannot use the TSC if it stops incrementing in deep sleep. 449 * Currently only Intel CPUs are known for this problem unless 450 * the invariant TSC bit is set. 451 */ 452 if (cpu_can_deep_sleep && cpu_vendor_id == CPU_VENDOR_INTEL && 453 (amd_pminfo & AMDPM_TSC_INVARIANT) == 0) { 454 tsc_timecounter.tc_quality = -1000; 455 if (bootverbose) 456 printf("TSC timecounter disabled: C3 enabled.\n"); 457 goto init; 458 } 459 |
|
| 447#ifdef SMP 448 /* 449 * We can not use the TSC in SMP mode unless the TSCs on all CPUs are 450 * synchronized. If the user is sure that the system has synchronized 451 * TSCs, set kern.timecounter.smp_tsc tunable to a non-zero value. 452 * We also limit the frequency even lower to avoid "temporal anomalies" 453 * as much as possible. 454 */ --- 133 unchanged lines hidden --- | 460#ifdef SMP 461 /* 462 * We can not use the TSC in SMP mode unless the TSCs on all CPUs are 463 * synchronized. If the user is sure that the system has synchronized 464 * TSCs, set kern.timecounter.smp_tsc tunable to a non-zero value. 465 * We also limit the frequency even lower to avoid "temporal anomalies" 466 * as much as possible. 467 */ --- 133 unchanged lines hidden --- |