1 /* 2 * QEMU MIPS interrupt support 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 * THE SOFTWARE. 21 */ 22 23 #include "qemu/osdep.h" 24 #include "qemu/main-loop.h" 25 #include "hw/irq.h" 26 #include "sysemu/kvm.h" 27 #include "kvm_mips.h" 28 29 static void cpu_mips_irq_request(void *opaque, int irq, int level) 30 { 31 MIPSCPU *cpu = opaque; 32 CPUMIPSState *env = &cpu->env; 33 CPUState *cs = CPU(cpu); 34 35 if (irq < 0 || irq > 7) { 36 return; 37 } 38 39 QEMU_IOTHREAD_LOCK_GUARD(); 40 41 if (level) { 42 env->CP0_Cause |= 1 << (irq + CP0Ca_IP); 43 } else { 44 env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP)); 45 } 46 47 if (kvm_enabled() && (irq == 2 || irq == 3)) { 48 kvm_mips_set_interrupt(cpu, irq, level); 49 } 50 51 if (env->CP0_Cause & CP0Ca_IP_mask) { 52 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 53 } else { 54 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 55 } 56 } 57 58 void cpu_mips_irq_init_cpu(MIPSCPU *cpu) 59 { 60 CPUMIPSState *env = &cpu->env; 61 qemu_irq *qi; 62 int i; 63 64 qi = qemu_allocate_irqs(cpu_mips_irq_request, cpu, 8); 65 for (i = 0; i < 8; i++) { 66 env->irq[i] = qi[i]; 67 } 68 g_free(qi); 69 } 70 71 void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level) 72 { 73 if (irq < 0 || irq > 2) { 74 return; 75 } 76 77 qemu_set_irq(env->irq[irq], level); 78 } 79