diff options
Diffstat (limited to 'hw/mips_pic.c')
-rw-r--r-- | hw/mips_pic.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/hw/mips_pic.c b/hw/mips_pic.c new file mode 100644 index 0000000..9d146b8 --- /dev/null +++ b/hw/mips_pic.c @@ -0,0 +1,39 @@ +/* + * MIPS CPU interrupt support. + * + */ + +#include "hw.h" + +/* Stub functions for hardware that don't exist. */ +void pic_info(void) +{ +} + +void irq_info(void) +{ +} + +static void mips_cpu_irq_handler(void *opaque, int irq, int level) +{ + CPUState *env = (CPUState *)opaque; + int causebit; + + if (irq < 0 || 7 < irq) + cpu_abort(env, "mips_pic_cpu_handler: Bad interrupt line %d\n", + irq); + + causebit = 0x00000100 << irq; + if (level) { + env->CP0_Cause |= causebit; + cpu_interrupt(env, CPU_INTERRUPT_HARD); + } else { + env->CP0_Cause &= ~causebit; + cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); + } +} + +qemu_irq *mips_cpu_irq_init(CPUState *env) +{ + return qemu_allocate_irqs(mips_cpu_irq_handler, env, 8); +} |