#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 do_qemu_int(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) | |
{ | |
set_except_vector(0, qemu_handle_int); | |
mips_hpt_frequency = QEMU_C0_COUNTER_CLOCK; /* 100MHz */ | |
init_i8259_irqs(); | |
set_c0_status(0x8400); | |
} |