#include <asm/io.h>
#include <asm/jazz.h>
-extern asmlinkage void jazz_handle_int(void);
-
-static spinlock_t r4030_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(r4030_lock);
static void enable_r4030_irq(unsigned int irq)
{
spin_unlock_irqrestore(&r4030_lock, flags);
}
-static unsigned int startup_r4030_irq(unsigned int irq)
-{
- enable_r4030_irq(irq);
- return 0; /* never anything pending */
-}
-
-#define shutdown_r4030_irq disable_r4030_irq
-
void disable_r4030_irq(unsigned int irq)
{
unsigned int mask = ~(1 << (irq - JAZZ_PARALLEL_IRQ));
spin_unlock_irqrestore(&r4030_lock, flags);
}
-#define mask_and_ack_r4030_irq disable_r4030_irq
-
-static void end_r4030_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
- enable_r4030_irq(irq);
-}
-
-static struct hw_interrupt_type r4030_irq_type = {
- "R4030",
- startup_r4030_irq,
- shutdown_r4030_irq,
- enable_r4030_irq,
- disable_r4030_irq,
- mask_and_ack_r4030_irq,
- end_r4030_irq,
- NULL
+static struct irq_chip r4030_irq_type = {
+ .typename = "R4030",
+ .ack = disable_r4030_irq,
+ .mask = disable_r4030_irq,
+ .mask_ack = disable_r4030_irq,
+ .unmask = enable_r4030_irq,
};
void __init init_r4030_ints(void)
{
int i;
- for (i = JAZZ_PARALLEL_IRQ; i <= JAZZ_TIMER_IRQ; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- irq_desc[i].handler = &r4030_irq_type;
- }
+ for (i = JAZZ_PARALLEL_IRQ; i <= JAZZ_TIMER_IRQ; i++)
+ set_irq_chip_and_handler(i, &r4030_irq_type, handle_level_irq);
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, 0);
r4030_read_reg16(JAZZ_IO_IRQ_SOURCE); /* clear pending IRQs */
*/
void __init arch_init_irq(void)
{
- set_except_vector(0, jazz_handle_int);
-
init_i8259_irqs(); /* Integrated i8259 */
init_r4030_ints();
change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
}
+
+static void loc_call(unsigned int irq, unsigned int mask)
+{
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+ r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
+ do_IRQ(irq);
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+ r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
+}
+
+static void ll_local_dev(void)
+{
+ switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
+ case 0:
+ panic("Unimplemented loc_no_irq handler");
+ break;
+ case 4:
+ loc_call(JAZZ_PARALLEL_IRQ, JAZZ_IE_PARALLEL);
+ break;
+ case 8:
+ loc_call(JAZZ_PARALLEL_IRQ, JAZZ_IE_FLOPPY);
+ break;
+ case 12:
+ panic("Unimplemented loc_sound handler");
+ break;
+ case 16:
+ panic("Unimplemented loc_video handler");
+ break;
+ case 20:
+ loc_call(JAZZ_ETHERNET_IRQ, JAZZ_IE_ETHERNET);
+ break;
+ case 24:
+ loc_call(JAZZ_SCSI_IRQ, JAZZ_IE_SCSI);
+ break;
+ case 28:
+ loc_call(JAZZ_KEYBOARD_IRQ, JAZZ_IE_KEYBOARD);
+ break;
+ case 32:
+ loc_call(JAZZ_MOUSE_IRQ, JAZZ_IE_MOUSE);
+ break;
+ case 36:
+ loc_call(JAZZ_SERIAL1_IRQ, JAZZ_IE_SERIAL1);
+ break;
+ case 40:
+ loc_call(JAZZ_SERIAL2_IRQ, JAZZ_IE_SERIAL2);
+ break;
+ }
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & IE_IRQ5)
+ write_c0_compare(0);
+ else if (pending & IE_IRQ4) {
+ r4030_read_reg32(JAZZ_TIMER_REGISTER);
+ do_IRQ(JAZZ_TIMER_IRQ);
+ } else if (pending & IE_IRQ3)
+ panic("Unimplemented ISA NMI handler");
+ else if (pending & IE_IRQ2)
+ do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK));
+ else if (pending & IE_IRQ1) {
+ ll_local_dev();
+ } else if (unlikely(pending & IE_IRQ0))
+ panic("Unimplemented local_dma handler");
+ else if (pending & IE_SW1) {
+ clear_c0_cause(IE_SW1);
+ panic("Unimplemented sw1 handler");
+ } else if (pending & IE_SW0) {
+ clear_c0_cause(IE_SW0);
+ panic("Unimplemented sw0 handler");
+ }
+}