Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 1 | /* |
| 2 | * VMI Time wrappers |
| 3 | * |
| 4 | * Copyright (C) 2006, VMware, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 14 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 15 | * details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | * |
| 21 | * Send feedback to dhecht@vmware.com |
| 22 | * |
| 23 | */ |
| 24 | |
Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 25 | #ifndef ASM_X86__VMI_TIME_H |
| 26 | #define ASM_X86__VMI_TIME_H |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 27 | |
| 28 | /* |
| 29 | * Raw VMI call indices for timer functions |
| 30 | */ |
| 31 | #define VMI_CALL_GetCycleFrequency 66 |
| 32 | #define VMI_CALL_GetCycleCounter 67 |
| 33 | #define VMI_CALL_SetAlarm 68 |
| 34 | #define VMI_CALL_CancelAlarm 69 |
| 35 | #define VMI_CALL_GetWallclockTime 70 |
| 36 | #define VMI_CALL_WallclockUpdated 71 |
| 37 | |
| 38 | /* Cached VMI timer operations */ |
| 39 | extern struct vmi_timer_ops { |
| 40 | u64 (*get_cycle_frequency)(void); |
| 41 | u64 (*get_cycle_counter)(int); |
| 42 | u64 (*get_wallclock)(void); |
| 43 | int (*wallclock_updated)(void); |
| 44 | void (*set_alarm)(u32 flags, u64 expiry, u64 period); |
| 45 | void (*cancel_alarm)(u32 flags); |
| 46 | } vmi_timer_ops; |
| 47 | |
| 48 | /* Prototypes */ |
| 49 | extern void __init vmi_time_init(void); |
| 50 | extern unsigned long vmi_get_wallclock(void); |
| 51 | extern int vmi_set_wallclock(unsigned long now); |
Jeremy Fitzhardinge | 688340e | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 52 | extern unsigned long long vmi_sched_clock(void); |
Alok Kataria | e93ef94 | 2008-07-01 11:43:36 -0700 | [diff] [blame] | 53 | extern unsigned long vmi_tsc_khz(void); |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 54 | |
| 55 | #ifdef CONFIG_X86_LOCAL_APIC |
Zachary Amsden | e0bb864 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 56 | extern void __devinit vmi_time_bsp_init(void); |
| 57 | extern void __devinit vmi_time_ap_init(void); |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 58 | #endif |
| 59 | |
| 60 | /* |
| 61 | * When run under a hypervisor, a vcpu is always in one of three states: |
| 62 | * running, halted, or ready. The vcpu is in the 'running' state if it |
| 63 | * is executing. When the vcpu executes the halt interface, the vcpu |
| 64 | * enters the 'halted' state and remains halted until there is some work |
| 65 | * pending for the vcpu (e.g. an alarm expires, host I/O completes on |
| 66 | * behalf of virtual I/O). At this point, the vcpu enters the 'ready' |
| 67 | * state (waiting for the hypervisor to reschedule it). Finally, at any |
| 68 | * time when the vcpu is not in the 'running' state nor the 'halted' |
| 69 | * state, it is in the 'ready' state. |
| 70 | * |
| 71 | * Real time is advances while the vcpu is 'running', 'ready', or |
| 72 | * 'halted'. Stolen time is the time in which the vcpu is in the |
| 73 | * 'ready' state. Available time is the remaining time -- the vcpu is |
| 74 | * either 'running' or 'halted'. |
| 75 | * |
| 76 | * All three views of time are accessible through the VMI cycle |
| 77 | * counters. |
| 78 | */ |
| 79 | |
| 80 | /* The cycle counters. */ |
| 81 | #define VMI_CYCLES_REAL 0 |
| 82 | #define VMI_CYCLES_AVAILABLE 1 |
| 83 | #define VMI_CYCLES_STOLEN 2 |
| 84 | |
| 85 | /* The alarm interface 'flags' bits */ |
| 86 | #define VMI_ALARM_COUNTERS 2 |
| 87 | |
| 88 | #define VMI_ALARM_COUNTER_MASK 0x000000ff |
| 89 | |
| 90 | #define VMI_ALARM_WIRED_IRQ0 0x00000000 |
| 91 | #define VMI_ALARM_WIRED_LVTT 0x00010000 |
| 92 | |
| 93 | #define VMI_ALARM_IS_ONESHOT 0x00000000 |
| 94 | #define VMI_ALARM_IS_PERIODIC 0x00000100 |
| 95 | |
| 96 | #define CONFIG_VMI_ALARM_HZ 100 |
| 97 | |
Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 98 | #endif /* ASM_X86__VMI_TIME_H */ |