diff options
Diffstat (limited to 'hw/apic.c')
| -rw-r--r-- | hw/apic.c | 11 |
1 files changed, 8 insertions, 3 deletions
@@ -280,6 +280,8 @@ void cpu_set_apic_base(CPUState *env, uint64_t val) #ifdef DEBUG_APIC printf("cpu_set_apic_base: %016" PRIx64 "\n", val); #endif + if (!s) + return; s->apicbase = (val & 0xfffff000) | (s->apicbase & (MSR_IA32_APICBASE_BSP | MSR_IA32_APICBASE_ENABLE)); /* if disabled, cannot be enabled again */ @@ -294,14 +296,17 @@ uint64_t cpu_get_apic_base(CPUState *env) { APICState *s = env->apic_state; #ifdef DEBUG_APIC - printf("cpu_get_apic_base: %016" PRIx64 "\n", (uint64_t)s->apicbase); + printf("cpu_get_apic_base: %016" PRIx64 "\n", + s ? (uint64_t)s->apicbase: 0); #endif - return s->apicbase; + return s ? s->apicbase : 0; } void cpu_set_apic_tpr(CPUX86State *env, uint8_t val) { APICState *s = env->apic_state; + if (!s) + return; s->tpr = (val & 0x0f) << 4; apic_update_irq(s); } @@ -309,7 +314,7 @@ void cpu_set_apic_tpr(CPUX86State *env, uint8_t val) uint8_t cpu_get_apic_tpr(CPUX86State *env) { APICState *s = env->apic_state; - return s->tpr >> 4; + return s ? s->tpr >> 4 : 0; } /* return -1 if no bit is set */ |