asmlinkage void
vrc5476_irq_dispatch(struct pt_regs *regs)
{
extern unsigned int do_IRQ(int irq, struct pt_regs *regs);
extern void spurious_interrupt(void);
u32 mask;
int nile4_irq;
mask = nile4_get_irq_stat(0);
/* quick check for possible time interrupt */
if (mask & (1 << VRC5476_IRQ_GPT)) {
do_IRQ(VRC5476_IRQ_BASE + VRC5476_IRQ_GPT, regs);
return;
}
/* check for i8259 interrupts */
if (mask & (1 << VRC5476_I8259_CASCADE)) {
int i8259_irq = nile4_i8259_iack();
do_IRQ(I8259_IRQ_BASE + i8259_irq, regs);
return;
}
/* regular nile4 interrupts (we should not really have any */
for (nile4_irq = 0; mask; nile4_irq++, mask >>= 1) {
if (mask & 1) {
do_IRQ(VRC5476_IRQ_BASE + nile4_irq, regs);
return;
}
}
spurious_interrupt();
}
void ddb_local0_irqdispatch(struct pt_regs *regs)
{
u32 mask;
int nile4_irq;
mask = nile4_get_irq_stat(0);
/* Handle the timer interrupt first */
#if 0
if (mask & (1 << NILE4_INT_GPT)) {
do_IRQ(nile4_to_irq(NILE4_INT_GPT), regs);
mask &= ~(1 << NILE4_INT_GPT);
}
#endif
for (nile4_irq = 0; mask; nile4_irq++, mask >>= 1)
if (mask & 1) {
if (nile4_irq == NILE4_INT_INTE) {
int i8259_irq;
nile4_clear_irq(NILE4_INT_INTE);
i8259_irq = nile4_i8259_iack();
do_IRQ(i8259_irq, regs);
} else
do_IRQ(nile4_to_irq(nile4_irq), regs);
}
}
void ddb_local0_irqdispatch(struct pt_regs *regs)
{
u32 mask;
int nile4_irq;
#if 1
volatile static int nesting = 0;
if (nesting++ == 0)
ddb5074_led_d3(1);
ddb5074_led_hex(nesting < 16 ? nesting : 15);
#endif
mask = nile4_get_irq_stat(0);
nile4_clear_irq_mask(mask);
/* Handle the timer interrupt first */
if (mask & (1 << NILE4_INT_GPT)) {
nile4_disable_irq(NILE4_INT_GPT);
do_IRQ(nile4_to_irq(NILE4_INT_GPT), regs);
nile4_enable_irq(NILE4_INT_GPT);
mask &= ~(1 << NILE4_INT_GPT);
}
for (nile4_irq = 0; mask; nile4_irq++, mask >>= 1)
if (mask & 1) {
nile4_disable_irq(nile4_irq);
if (nile4_irq == NILE4_INT_INTE) {
int i8259_irq = nile4_i8259_iack();
i8259_do_irq(i8259_irq, regs);
} else
do_IRQ(nile4_to_irq(nile4_irq), regs);
nile4_enable_irq(nile4_irq);
}
#if 1
if (--nesting == 0)
ddb5074_led_d3(0);
ddb5074_led_hex(nesting < 16 ? nesting : 15);
#endif
}
