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120 giacomo 1
/* Project:     OSLib
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 * Description: The OS Construction Kit
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 * Date:                1.6.2000
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 * Idea by:             Luca Abeni & Gerardo Lamastra
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 *
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 * OSLib is an SO project aimed at developing a common, easy-to-use
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 * low-level infrastructure for developing OS kernels and Embedded
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 * Applications; it partially derives from the HARTIK project but it
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 * currently is independently developed.
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 *
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 * OSLib is distributed under GPL License, and some of its code has
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 * been derived from the Linux kernel source; also some important
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 * ideas come from studying the DJGPP go32 extender.
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 *
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 * We acknowledge the Linux Community, Free Software Foundation,
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 * D.J. Delorie and all the other developers who believe in the
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 * freedom of software and ideas.
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 *
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 * For legalese, check out the included GPL license.
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 */
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/*      Advanced Timer
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 *      Date: 8.4.2003
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 *      Author: Giacomo Guidi <giacomo@gandalf.sssup.it>
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 *
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 */
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#ifndef __ADVTIMER_H__
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#define __ADVTIMER_H__
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#include <ll/i386/defs.h>
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BEGIN_DEF
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/* TSC */
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#define rdtsc(low,high) \
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     __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
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#define rdtscll(val) \
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     __asm__ __volatile__("rdtsc" : "=A" (val))
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/* RTC */
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#define RTC_PORT(x)     (0x70 + (x))
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#define CMOS_READ(addr,val)     \
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{                               \
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outp(RTC_PORT(0),(addr));       \
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val = inp(RTC_PORT(1));         \
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}
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#define CMOS_WRITE(addr,val)    \
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{                               \
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outp(RTC_PORT(0),(addr));       \
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outp(RTC_PORT(1),(val));        \
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}
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#define RTC_IRQ 8
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131 giacomo 60
extern signed long long clk_per_msec;
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extern __inline__ void UNSIGNED_TSC2NSEC(unsigned long long tsc, unsigned long long *n)
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{
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        unsigned long nl,nh;
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        nl = *n & 0xFFFFFFFF;
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        nh = *n >> 32;
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        __asm__("mull %%ecx\n\t"
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                "movl %%eax,%%esi\n\t"
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                "movl %%edx,%%edi\n\t"
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                "xorl %%edx,%%edx\n\t"
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                "movl %6,%%eax\n\t"
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                "mull %%ecx\n\t"
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                "addl %%edi,%%eax\n\t"
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                "adcl $0,%%edx\n\t"
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                "movl %5,%%ecx\n\t"
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                "divl %%ecx\n\t"
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                "xchgl %%eax,%%esi\n\t"
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                "divl %%ecx\n\t"
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                : "=a" (nl), "=S" (nh)
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                : "c" (1000000), "a" ((unsigned long)(tsc & 0xFFFFFFFF)), "d" (0),
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                  "m" ((unsigned long)(clk_per_msec)), "m" ((unsigned long)(tsc >> 32)),
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                  "S" (0), "D" (0));
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        *n = nh;
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        *n <<= 32;
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        *n |= nl;
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}
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void ll_init_advtimer(void);
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void ll_restore_CMOS(void);
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120 giacomo 96
END_DEF
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#endif