1 #include "hw/hw.h" 2 #include "hw/mips/mips.h" 3 #include "cpu.h" 4 5 /* Raise IRQ to CPU if necessary. It must be called every time the active 6 IRQ may change */ 7 void cpu_mips_update_irq(CPUOldState *env) 8 { 9 CPUState *cpu = ENV_GET_CPU(env); 10 11 if ((env->CP0_Status & (1 << CP0St_IE)) && 12 !(env->CP0_Status & (1 << CP0St_EXL)) && 13 !(env->CP0_Status & (1 << CP0St_ERL)) && 14 !(env->hflags & MIPS_HFLAG_DM)) { 15 if ((env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) && 16 !(cpu->interrupt_request & CPU_INTERRUPT_HARD)) { 17 cpu_interrupt(cpu, CPU_INTERRUPT_HARD); 18 } 19 } else 20 cpu_reset_interrupt(cpu, CPU_INTERRUPT_HARD); 21 } 22 23 static void cpu_mips_irq_request(void *opaque, int irq, int level) 24 { 25 CPUOldState *env = (CPUOldState *)opaque; 26 27 if (irq < 0 || irq > 7) 28 return; 29 30 if (level) { 31 env->CP0_Cause |= 1 << (irq + CP0Ca_IP); 32 } else { 33 env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP)); 34 } 35 cpu_mips_update_irq(env); 36 } 37 38 void cpu_mips_irq_init_cpu(CPUOldState *env) 39 { 40 qemu_irq *qi; 41 int i; 42 43 qi = qemu_allocate_irqs(cpu_mips_irq_request, env, 8); 44 for (i = 0; i < 8; i++) { 45 env->irq[i] = qi[i]; 46 } 47 } 48