Subversion Repositories HelenOS-historic

Rev

Rev 577 | Rev 1702 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 577 Rev 1482
Line 33... Line 33...
33 
#include <arch/interrupt.h>
 33 
#include <arch/interrupt.h>
34 
#include <arch/register.h>
 34 
#include <arch/register.h>
35 
#include <arch/asm.h>
 35 
#include <arch/asm.h>
36 
#include <arch/barrier.h>
 36 
#include <arch/barrier.h>
37 
#include <time/clock.h>
 37 
#include <time/clock.h>
- 
 
 38 
#include <arch.h>
38 
 
 39 
 
39 
 
 40 
 
- 
 
 41 
#define IT_SERVICE_CLOCKS 64
- 
 
 42 
 
40 
/** Initialize Interval Timer. */
 43 
/** Initialize Interval Timer. */
41 
void it_init(void)
 44 
void it_init(void)
42 
{
 45 
{
43 
    cr_itv_t itv;
 46 
    cr_itv_t itv;
44 
 
 47 
 
Line 56... Line 59...
56 
 
 59 
 
57 
    /* propagate changes */
 60 
    /* propagate changes */
58 
    srlz_d();
 61 
    srlz_d();
59 
}
 62 
}
60 
 
 63 
 
- 
 
 64 
 
61 
/** Process Interval Timer interrupt. */
 65 
/** Process Interval Timer interrupt. */
62 
void it_interrupt(void)
 66 
void it_interrupt(void)
63 
{
 67 
{
- 
 
 68 
    __s64 c;
- 
 
 69 
    __s64 m;
- 
 
 70 
   
64 
    eoi_write(EOI);
 71 
    eoi_write(EOI);
- 
 
 72 
   
- 
 
 73 
    m=itm_read();
- 
 
 74 
   
- 
 
 75 
    while(1)
- 
 
 76 
    {
- 
 
 77 
   
- 
 
 78 
        c=itc_read();
- 
 
 79 
        c+=IT_SERVICE_CLOCKS;
- 
 
 80 
 
- 
 
 81 
        m+=IT_DELTA;
- 
 
 82 
        if(m-c<0)
- 
 
 83 
        {
65 
    itm_write(itc_read() + IT_DELTA);   /* program next interruption */
 84 
            CPU->missed_clock_ticks++;
- 
 
 85 
        }
- 
 
 86 
        else break;
- 
 
 87 
    }
- 
 
 88 
   
- 
 
 89 
    itm_write(m);
66 
    srlz_d();               /* propagate changes */
 90 
    srlz_d();               /* propagate changes */
- 
 
 91 
   
- 
 
 92 
   
- 
 
 93 
   
67 
    clock();
 94 
    clock();
68 
    poll_keyboard();
 95 
    poll_keyboard();
69 
}
 96 
}