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 "hw/hw.h" 24 #include "hw/mips/cpudevs.h" 25 #include "cpu.h" 26 27 static void cpu_mips_irq_request(void *opaque, int irq, int level) 28 { 29 MIPSCPU *cpu = opaque; 30 CPUMIPSState *env = &cpu->env; 31 CPUState *cs = CPU(cpu); 32 33 if (irq < 0 || irq > 7) 34 return; 35 36 if (level) { 37 env->CP0_Cause |= 1 << (irq + CP0Ca_IP); 38 } else { 39 env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP)); 40 } 41 42 if (env->CP0_Cause & CP0Ca_IP_mask) { 43 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 44 } else { 45 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 46 } 47 } 48 49 void cpu_mips_irq_init_cpu(CPUMIPSState *env) 50 { 51 qemu_irq *qi; 52 int i; 53 54 qi = qemu_allocate_irqs(cpu_mips_irq_request, mips_env_get_cpu(env), 8); 55 for (i = 0; i < 8; i++) { 56 env->irq[i] = qi[i]; 57 } 58 } 59 60 void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level) 61 { 62 if (irq < 0 || irq > 2) { 63 return; 64 } 65 66 qemu_set_irq(env->irq[irq], level); 67 } 68