diff options
| -rw-r--r-- | hw/arm/armv7m.c | 7 | ||||
| -rw-r--r-- | hw/intc/armv7m_nvic.c | 6 | ||||
| -rw-r--r-- | target/arm/cpu.c | 18 |
3 files changed, 29 insertions, 2 deletions
diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c index a4ab7d2069..9e00d4037c 100644 --- a/hw/arm/armv7m.c +++ b/hw/arm/armv7m.c @@ -178,6 +178,12 @@ static void armv7m_realize(DeviceState *dev, Error **errp) return; } } + + /* Tell the CPU where the NVIC is; it will fail realize if it doesn't + * have one. + */ + s->cpu->env.nvic = &s->nvic; + object_property_set_bool(OBJECT(s->cpu), true, "realized", &err); if (err != NULL) { error_propagate(errp, err); @@ -202,7 +208,6 @@ static void armv7m_realize(DeviceState *dev, Error **errp) sbd = SYS_BUS_DEVICE(&s->nvic); sysbus_connect_irq(sbd, 0, qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ)); - s->cpu->env.nvic = &s->nvic; memory_region_add_subregion(&s->container, 0xe000e000, sysbus_mmio_get_region(sbd, 0)); diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c index c51151fa8a..661be8878a 100644 --- a/hw/intc/armv7m_nvic.c +++ b/hw/intc/armv7m_nvic.c @@ -2183,7 +2183,11 @@ static void armv7m_nvic_realize(DeviceState *dev, Error **errp) int regionlen; s->cpu = ARM_CPU(qemu_get_cpu(0)); - assert(s->cpu); + + if (!s->cpu || !arm_feature(&s->cpu->env, ARM_FEATURE_M)) { + error_setg(errp, "The NVIC can only be used with a Cortex-M CPU"); + return; + } if (s->num_irq > NVIC_MAX_IRQ) { error_setg(errp, "num-irq %d exceeds NVIC maximum", s->num_irq); diff --git a/target/arm/cpu.c b/target/arm/cpu.c index ab047b9402..e1de45e904 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -767,6 +767,24 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp) return; } +#ifndef CONFIG_USER_ONLY + /* The NVIC and M-profile CPU are two halves of a single piece of + * hardware; trying to use one without the other is a command line + * error and will result in segfaults if not caught here. + */ + if (arm_feature(env, ARM_FEATURE_M)) { + if (!env->nvic) { + error_setg(errp, "This board cannot be used with Cortex-M CPUs"); + return; + } + } else { + if (env->nvic) { + error_setg(errp, "This board can only be used with Cortex-M CPUs"); + return; + } + } +#endif + cpu_exec_realizefn(cs, &local_err); if (local_err != NULL) { error_propagate(errp, local_err); |