gptimer.c

sun公司的sparc v8处理器的配置代码。

#include "testmod.h"
#include "irqmp.h"

struct timerreg {
    volatile unsigned int counter;		/* 0x0 */
    volatile unsigned int reload;		/* 0x4 */
    volatile unsigned int control;		/* 0x8 */
    volatile unsigned int dummy;		/* 0xC */
};

struct gptimer {
    volatile unsigned int scalercnt;		/* 0x00 */
    volatile unsigned int scalerload;		/* 0x04 */
    volatile unsigned int configreg;		/* 0x08 */
    volatile unsigned int dummy1;		/* 0x0C */
    struct timerreg timer[7];
};

#define IRQPEND 0x10
#define CHAIN_TEST 8

gptimer_test(int addr)
{
        struct gptimer *lr = (struct gptimer *) addr;
        extern volatile int irqtbl[];
        int i, j, pil, ntimers;

	report_device(0x01011000);
	ntimers = lr->configreg & 0x7;
	lr->scalerload = -1;
	if (lr->scalercnt == lr->scalercnt) fail(1);

/* timer 1 test */

	lr->scalerload = 31;
	lr->scalercnt = 31;
	for (i=0; i<ntimers; i++) lr->timer[i].control = 0; // halt all timers
	
	/* test basic functions */
	for (i=0; i<ntimers; i++) {
	    report_subtest(i);
	    lr->timer[i].counter = 0;
	    lr->timer[i].reload = 15;
	    lr->timer[i].control = 0x6;
	    if (lr->timer[i].counter != 15) fail(3); // check loading
	    lr->timer[i].control = 0xf;
	    for (j=14; j >= 0; j--) { while (lr->timer[i].counter != j) {}}
	    while (lr->timer[i].counter != 15) {}
    
	    if (!(lr->timer[i].control & IRQPEND)) fail(4);
	    lr->timer[i].control = 0;	
	    if (lr->timer[i].control & IRQPEND) fail(5);
	}

	if (ntimers > 1) {		/* simple check of chain function */
	    report_subtest(CHAIN_TEST);
	    lr->timer[0].control = 0xf;
	    lr->timer[1].control = 0x2f;
	    while (lr->timer[1].counter != 13) {}
	}

	for (i=0; i<ntimers; i++) lr->timer[i].control = 0; // halt all timers
	
	if (irqmp_base) {
	    init_irqmp(irqmp_base);
	    irqmp_base->irqmask = 1 << 8;	  /* unmask interrupt */
	    lr->timer[0].reload = 15;
	    lr->timer[0].control = 0xd;
	    asm("wr %g0, %g0, %asr19");		/* power-down */
	}
}


/*
gptimer_test_pp(int addr, int irq)
{
    struct ambadev dev;

    if (find_ahb_slvi(&dev) == 0) 
        gptimer_test(dev.start[0], dev.irq);
}
*/