git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2635 c046a42c-6fe2-441c-8c8c-71466251a162
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
#include "vl.h"
|
|
#include "cpu.h"
|
|
|
|
/* Raise IRQ to CPU if necessary. It must be called every time the active
|
|
IRQ may change */
|
|
void cpu_mips_update_irq(CPUState *env)
|
|
{
|
|
if ((env->CP0_Status & (1 << CP0St_IE)) &&
|
|
!(env->CP0_Status & (1 << CP0St_EXL)) &&
|
|
!(env->CP0_Status & (1 << CP0St_ERL)) &&
|
|
!(env->hflags & MIPS_HFLAG_DM)) {
|
|
if ((env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) &&
|
|
!(env->interrupt_request & CPU_INTERRUPT_HARD)) {
|
|
cpu_interrupt(env, CPU_INTERRUPT_HARD);
|
|
}
|
|
} else
|
|
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
|
|
}
|
|
|
|
static void cpu_mips_irq_request(void *opaque, int irq, int level)
|
|
{
|
|
CPUState *env = (CPUState *)opaque;
|
|
|
|
if (irq < 0 || irq > 7)
|
|
return;
|
|
|
|
if (level) {
|
|
env->CP0_Cause |= 1 << (irq + CP0Ca_IP);
|
|
} else {
|
|
env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP));
|
|
}
|
|
cpu_mips_update_irq(env);
|
|
}
|
|
|
|
void cpu_mips_irq_init_cpu(CPUState *env)
|
|
{
|
|
qemu_irq *qi;
|
|
int i;
|
|
|
|
qi = qemu_allocate_irqs(cpu_mips_irq_request, env, 8);
|
|
for (i = 0; i < 8; i++) {
|
|
env->irq[i] = qi[i];
|
|
}
|
|
}
|