47 lines
819 B
C
47 lines
819 B
C
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#include <stdio.h>
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#include <time.h>
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#include <sys/times.h>
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#include <sys/types.h>
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#include <minix/u64.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/minlib.h>
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#include <machine/archtypes.h>
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#include "sysutil.h"
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#ifndef CONFIG_MAX_CPUS
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#define CONFIG_MAX_CPUS 1
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#endif
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#define MICROHZ 1000000 /* number of micros per second */
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#define MICROSPERTICK(h) (MICROHZ/(h)) /* number of micros per HZ tick */
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static u32_t calib_mhz = 1000, Hz = 1000;
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int
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micro_delay(u32_t micros)
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{
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return OK;
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}
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u32_t tsc_64_to_micros(u64_t tsc)
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{
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u64_t tmp;
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tmp = div64u64(tsc, calib_mhz);
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if (ex64hi(tmp)) {
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printf("tsc_64_to_micros: more than 2^32ms\n");
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return ~0UL;
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} else {
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return ex64lo(tmp);
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}
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}
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u32_t tsc_to_micros(u32_t low, u32_t high)
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{
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return tsc_64_to_micros(make64(low, high));
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}
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