mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 02:52:56 +00:00
f30a6484f1
It was used on Apollo only, before its conversion to genirq. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/traps.h>
|
|
#include <asm/apollohw.h>
|
|
|
|
unsigned int apollo_irq_startup(struct irq_data *data)
|
|
{
|
|
unsigned int irq = data->irq;
|
|
|
|
if (irq < 8)
|
|
*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
|
|
else
|
|
*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
|
|
return 0;
|
|
}
|
|
|
|
void apollo_irq_shutdown(struct irq_data *data)
|
|
{
|
|
unsigned int irq = data->irq;
|
|
|
|
if (irq < 8)
|
|
*(volatile unsigned char *)(pica+1) |= (1 << irq);
|
|
else
|
|
*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
|
|
}
|
|
|
|
void apollo_irq_eoi(struct irq_data *data)
|
|
{
|
|
*(volatile unsigned char *)(pica) = 0x20;
|
|
*(volatile unsigned char *)(picb) = 0x20;
|
|
}
|
|
|
|
static struct irq_chip apollo_irq_chip = {
|
|
.name = "apollo",
|
|
.irq_startup = apollo_irq_startup,
|
|
.irq_shutdown = apollo_irq_shutdown,
|
|
.irq_eoi = apollo_irq_eoi,
|
|
};
|
|
|
|
|
|
void __init dn_init_IRQ(void)
|
|
{
|
|
m68k_setup_user_interrupt(VEC_USER + 96, 16);
|
|
m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
|
|
IRQ_APOLLO, 16);
|
|
}
|