source: mypx/target/dve68k_gcc/target_timer.c

/*
 *  TOPPERS/ASP Kernel
 *      Toyohashi Open Platform for Embedded Real-Time Systems/
 *      Advanced Standard Profile Kernel
 * 
 *  Copyright (C) 2005,2006 by Embedded and Real-Time Systems Laboratory
 *              Graduate School of Information Science, Nagoya Univ., JAPAN
 * 
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/*
 *              ¥¿¥€¥Þ¥É¥é¥€¥Ð¡ÊDVE68K/40ÍÑ¡Ë
 */

#include "kernel_impl.h"
#include "time_event.h"
#include <sil.h>
#include "target_timer.h"

/*
 *  ¥¿¥€¥Þ€Îµ¯Æ°œèÍý
 */
void
target_timer_initialize(intptr_t exinf)
{
        CLOCK   cyc = TO_CLOCK(TIC_NUME, TIC_DENO);

        /*
         *  ¥¿¥€¥ÞŒþŽü€òÀßÄꀷ¡€¥¿¥€¥Þ€ÎÆ°ºî€ò³«»Ï€¹€ë¡¥
         */
        assert(cyc <= MAX_CLOCK);
        dga_write((void *) TADR_DGA_CSR12, CSR12_START | cyc);

        /*
         *  ¥¿¥€¥Þ³ä¹þ€ßÍ×µá€ò¥¯¥ê¥¢€¹€ë¡¥
         */
        x_clear_int(INTNO_TIMER);
}

/*
 *  ¥¿¥€¥Þ€ÎÄä»ßœèÍý
 */
void
target_timer_terminate(intptr_t exinf)
{
        /*
         *  ¥¿¥€¥Þ€ÎÆ°ºî€òÄä»ß€¹€ë¡¥
         */
        dga_write((void *) TADR_DGA_CSR12, CSR12_STOP);
}

/*
 *  ¥¿¥€¥Þ³ä¹þ€ß¥Ï¥ó¥É¥é
 */
void
target_timer_handler(void)
{
        i_begin_int(INTNO_TIMER);
        signal_time();                                  /* ¥¿¥€¥à¥Æ¥£¥Ã¥¯€Î¶¡µë */
        i_end_int(INTNO_TIMER);
}