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hw/arm/armsse: Add unimplemented-device stub for CPU local control registers 

The SSE-200 has a "CPU local security control" register bank; add an
unimplemented-device stub for it. (The register bank has only one
interesting register, which allows the guest to lock down changes
to various CPU registers so they cannot be modified further. We
don't support that in our Cortex-M33 model anyway.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190121185118.18550-19-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2019-02-01 14:55:43 +00:00
parent 2357bca532
commit c1f572579e
2 changed files with 32 additions and 0 deletions
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31
hw/arm/armsse.c
View File

@ -33,6 +33,7 @@ struct ARMSSEInfo {
bool has_mhus;
bool has_ppus;
bool has_cachectrl;
bool has_cpusecctrl;
};
static const ARMSSEInfo armsse_variants[] = {
@ -45,6 +46,7 @@ static const ARMSSEInfo armsse_variants[] = {
.has_mhus = false,
.has_ppus = false,
.has_cachectrl = false,
.has_cpusecctrl = false,
},
};
@ -302,6 +304,16 @@ static void armsse_init(Object *obj)
g_free(name);
}
}
if (info->has_cpusecctrl) {
for (i = 0; i < info->num_cpus; i++) {
char *name = g_strdup_printf("cpusecctrl%d", i);
sysbus_init_child_obj(obj, name, &s->cpusecctrl[i],
sizeof(s->cpusecctrl[i]),
TYPE_UNIMPLEMENTED_DEVICE);
g_free(name);
}
}
object_initialize_child(obj, "nmi-orgate", &s->nmi_orgate,
sizeof(s->nmi_orgate), TYPE_OR_IRQ,
&error_abort, NULL);
@ -833,6 +845,25 @@ static void armsse_realize(DeviceState *dev, Error **errp)
memory_region_add_subregion(&s->cpu_container[i], 0x50010000, mr);
}
}
if (info->has_cpusecctrl) {
for (i = 0; i < info->num_cpus; i++) {
char *name = g_strdup_printf("CPUSECCTRL%d", i);
MemoryRegion *mr;
qdev_prop_set_string(DEVICE(&s->cpusecctrl[i]), "name", name);
g_free(name);
qdev_prop_set_uint64(DEVICE(&s->cpusecctrl[i]), "size", 0x1000);
object_property_set_bool(OBJECT(&s->cpusecctrl[i]), true,
"realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpusecctrl[i]), 0);
memory_region_add_subregion(&s->cpu_container[i], 0x50011000, mr);
}
}
/* 0x40020000 .. 0x4002ffff : ARMSSE system control peripheral region */
/* Devices behind APB PPC1:

1
include/hw/arm/armsse.h
View File

@ -151,6 +151,7 @@ typedef struct ARMSSE {
UnimplementedDeviceState mhu[2];
UnimplementedDeviceState ppu[NUM_PPUS];
UnimplementedDeviceState cachectrl[SSE_MAX_CPUS];
UnimplementedDeviceState cpusecctrl[SSE_MAX_CPUS];
/*
* 'container' holds all devices seen by all CPUs.