qemu/hw/mips_int.c
ths 24c7b0e330 Sanitize mips exception handling.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2546 c046a42c-6fe2-441c-8c8c-71466251a162
2007-03-30 16:44:54 +00:00

34 lines
925 B
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);
}
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);
}