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/*
* QEMU MIPS interrupt support
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "hw/irq.h"
#include "hw/mips/cpudevs.h"
#include "sysemu/kvm.h"
#include "kvm_mips.h"
static void cpu_mips_irq_request(void *opaque, int irq, int level)
{
MIPSCPU *cpu = opaque;
CPUMIPSState *env = &cpu->env;
CPUState *cs = CPU(cpu);
bool locked = false;
if (irq < 0 || irq > 7) {
return;
}
/* Make sure locking works even if BQL is already held by the caller */
if (!qemu_mutex_iothread_locked()) {
locked = true;
qemu_mutex_lock_iothread();
}
if (level) {
env->CP0_Cause |= 1 << (irq + CP0Ca_IP);
} else {
env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP));
}
if (kvm_enabled() && (irq == 2 || irq == 3)) {
kvm_mips_set_interrupt(cpu, irq, level);
}
if (env->CP0_Cause & CP0Ca_IP_mask) {
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
} else {
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
if (locked) {
qemu_mutex_unlock_iothread();
}
}
void cpu_mips_irq_init_cpu(MIPSCPU *cpu)
{
CPUMIPSState *env = &cpu->env;
qemu_irq *qi;
int i;
qi = qemu_allocate_irqs(cpu_mips_irq_request, cpu, 8);
for (i = 0; i < 8; i++) {
env->irq[i] = qi[i];
}
g_free(qi);
}
void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level)
{
if (irq < 0 || irq > 2) {
return;
}
qemu_set_irq(env->irq[irq], level);
}
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