linux/arch/mips/qemu/q-irq.c
Ralf Baechle e4ac58afdf [MIPS] Rewrite all the assembler interrupt handlers to C.
Saves like 1,600 lines of code, is way easier to debug, compilers
frequently do a better job than the cut and paste type of handlers many
boards had.  And finally having all the stuff done in a single place
also means alot of bug potencial for the MT ASE is gone.

The only surviving handler in assembler is the DECstation one; I hope
Maciej will rewrite it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-19 04:14:21 +02:00

36 lines
677 B
C

#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/i8259.h>
#include <asm/mipsregs.h>
#include <asm/qemu.h>
#include <asm/system.h>
#include <asm/time.h>
extern asmlinkage void qemu_handle_int(void);
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & 0x8000) {
ll_timer_interrupt(Q_COUNT_COMPARE_IRQ, regs);
return;
}
if (pending & 0x0400) {
int irq = i8259_irq();
if (likely(irq >= 0))
do_IRQ(irq, regs);
return;
}
}
void __init arch_init_irq(void)
{
mips_hpt_frequency = QEMU_C0_COUNTER_CLOCK; /* 100MHz */
init_i8259_irqs();
set_c0_status(0x8400);
}