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| 2 | /* -*- Mode:C; c-basic-offset:4; tab-width:4; indent-tabs-mode:nil -*- */ |
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| 3 | /* |
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| 4 | * vtm.h: virtual timer head file. |
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| 5 | * Copyright (c) 2004, Intel Corporation. |
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| 6 | * |
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| 7 | * This program is free software; you can redistribute it and/or modify it |
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| 8 | * under the terms and conditions of the GNU General Public License, |
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| 9 | * version 2, as published by the Free Software Foundation. |
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| 10 | * |
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| 11 | * This program is distributed in the hope it will be useful, but WITHOUT |
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| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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| 14 | * more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License along with |
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| 17 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 18 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
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| 19 | * |
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| 20 | * Yaozu Dong (Eddie Dong) (Eddie.dong@intel.com) |
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| 21 | */ |
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| 22 | |
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| 23 | #ifndef _VTM_H_ |
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| 24 | #define _VTM_H_ |
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| 25 | |
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| 26 | #include <xen/timer.h> |
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| 27 | #include <xen/types.h> |
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| 28 | |
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| 29 | #define MAX_JUMP_STEP (5000) /* 500ms, max jump step */ |
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| 30 | #define MIN_GUEST_RUNNING_TIME (0) /* 10ms for guest os to run */ |
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| 31 | #define ITV_VECTOR_MASK (0xff) |
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| 32 | |
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| 33 | typedef struct vtime { |
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| 34 | long vtm_offset; // guest ITC = host ITC + vtm_offset |
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| 35 | uint64_t vtm_local_drift; |
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| 36 | uint64_t last_itc; |
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| 37 | uint64_t pending; |
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| 38 | /* |
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| 39 | * Local drift (temporary) after guest suspension |
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| 40 | * In case of long jump amount of ITC after suspension, |
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| 41 | * guest ITC = host ITC + vtm_offset - vtm_local_drift; |
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| 42 | * so that the duration passed saw in guest ITC is limited to |
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| 43 | * cfg_max_jump that will make all kind of device driver happy. |
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| 44 | */ |
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| 45 | |
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| 46 | // next all uses ITC tick as unit |
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| 47 | uint64_t cfg_max_jump; // max jump within one time suspendsion |
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| 48 | uint64_t cfg_min_grun; // min guest running time since last jump |
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| 49 | // uint64_t latest_read_itc; // latest guest read ITC |
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| 50 | struct timer vtm_timer; |
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| 51 | // int triggered; |
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| 52 | |
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| 53 | |
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| 54 | uint64_t guest_running_time; // guest running time since last switch |
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| 55 | //uint64_t vtm_last_suspending_time; |
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| 56 | //uint64_t switch_in_time; |
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| 57 | //uint64_t switch_out_time; |
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| 58 | //uint64_t itc_freq; |
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| 59 | |
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| 60 | } vtime_t; |
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| 61 | |
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| 62 | #define ITV_VECTOR(itv) (itv&0xff) |
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| 63 | #define ITV_IRQ_MASK(itv) (itv&(1<<16)) |
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| 64 | |
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| 65 | #define VTM_FIRED(vtm) ((vtm)->triggered) |
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| 66 | |
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| 67 | #endif /* _STATS_H_ */ |
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