36388314fe
When hw interrupt pending bits in CP0_Cause are set, the CPU should see the hw interrupt line as active. The CPU may or may not take the interrupt based on internal state (global irq mask etc) but the glue logic shouldn't care. This fixes MIPS external hw interrupts in combination with -icount. Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
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* QEMU MIPS interrupt support
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "mips_cpudevs.h"
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#include "cpu.h"
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static void cpu_mips_irq_request(void *opaque, int irq, int level)
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{
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CPUState *env = (CPUState *)opaque;
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if (irq < 0 || irq > 7)
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return;
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if (level) {
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env->CP0_Cause |= 1 << (irq + CP0Ca_IP);
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} else {
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env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP));
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}
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if (env->CP0_Cause & CP0Ca_IP_mask) {
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cpu_interrupt(env, CPU_INTERRUPT_HARD);
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} else {
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cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
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}
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}
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void cpu_mips_irq_init_cpu(CPUState *env)
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{
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qemu_irq *qi;
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int i;
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qi = qemu_allocate_irqs(cpu_mips_irq_request, env, 8);
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for (i = 0; i < 8; i++) {
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env->irq[i] = qi[i];
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}
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}
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