Revision 29e922b6 qemu-timer.c
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#include <mmsystem.h> |
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#endif |
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#include "cpu-defs.h" |
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#include "qemu-timer.h" |
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#include "exec-all.h" |
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/* Conversion factor from emulated instructions to virtual clock ticks. */ |
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static int icount_time_shift;
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int icount_time_shift; |
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/* Arbitrarily pick 1MIPS as the minimum allowable speed. */ |
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#define MAX_ICOUNT_SHIFT 10 |
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/* Compensate for varying guest execution speed. */ |
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static int64_t qemu_icount_bias;
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int64_t qemu_icount_bias; |
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static QEMUTimer *icount_rt_timer; |
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static QEMUTimer *icount_vm_timer; |
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| ... | ... | |
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} |
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#endif |
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/* Return the virtual CPU time, based on the instruction counter. */ |
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static int64_t cpu_get_icount(void) |
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{
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int64_t icount; |
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CPUState *env = cpu_single_env;; |
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icount = qemu_icount; |
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if (env) {
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if (!can_do_io(env)) |
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fprintf(stderr, "Bad clock read\n"); |
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icount -= (env->icount_decr.u16.low + env->icount_extra); |
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} |
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return qemu_icount_bias + (icount << icount_time_shift); |
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} |
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/***********************************************************/ |
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/* guest cycle counter */ |
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