| #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); |
| } |