/* Disable the Fixed-Interval-Timer */
void fit_disable()
{
U32 tcr;
MFSPR(tcr, TCR);
tcr &= ~FIT_INT_ENABLE;
MTSPR(tcr, TCR);
}
void fit_init()
{
U32 tcr;
MFSPR(tcr, TCR);
tcr |= FIT_TIME_PERIOD_3;
MTSPR(tcr, TCR);
}
/* Enable the Fixed-Interval-Timer */
void fit_enable()
{
U32 msr, tcr;
MFSPR(tcr, TCR);
tcr |= FIT_INT_ENABLE;
MTSPR(tcr, TCR);
MFMSR(msr);
msr |= MSR_EXTERNAL_IRQ_ENABLE;
MTMSR(msr);
ISYNC;
}
int main(int argc, char **argv)
{
char src1[4096] = "Hello world.";
char dst1[4096] = "1111111111111111111111111111111111";
char src2[4096] = "The whole world spread before you.";
char dst2[4096] = "2222222222222222222222222222222222";
// Attach the external interrupt handler for 'intr0'
int_init();
int_add(0, (void *)interruptHandler, NULL);
int_enable(0);
// Enable external interrupts
Uns32 spr = MFSPR(17);
spr |= 0x4;
MTSPR(17, spr);
writeReg8(DMA_BASE, DMA_CONFIGURATION, BURST_SIZE); /* reset */
LOG("initial dst1 '%s' dst2 '%s'\n", dst1, dst2);
/* write to DMAC registers to start burst */
dmaBurst(0, src1, dst1, strlen(src1)+1);
dmaBurst(1, src2, dst2, strlen(src2)+1);
/* wait for burst to complete */
LOG("Waiting for interrupts\n");
while ( interruptCount < 2 )
;
LOG("%u interrupts received\n", interruptCount);
/* check results */
LOG("DMA result dst1 '%s' dst2 '%s'\n", dst1, dst2);
return 1;
}
static void
mfspr(int d, int s)
{
MFSPR(s, d);
}