armv7m: Pass through start-powered-off CPU property

Expose "start-powered-off" as a property of the ARMv7M container,
which we just pass through to the CPU object in the same way that we
do for "init-svtor" and "idau". (We want this for the SSE-200, which
powers up only the first CPU at reset and leaves the second powered
down.)

As with the other CPU properties here, we can't just use alias
properties, because the CPU QOM object is not created until armv7m
realize time.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190121185118.18550-4-peter.maydell@linaro.org

diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 0f2c8e066cffec6b6162f2493d53ad60f3a78d89..adae11e76edc918b14c9f52d10b7b814d017832d 100644 (file)
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -182,6 +182,14 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
             return;
         }
     }
+    if (object_property_find(OBJECT(s->cpu), "start-powered-off", NULL)) {
+        object_property_set_bool(OBJECT(s->cpu), s->start_powered_off,
+                                 "start-powered-off", &err);
+        if (err != NULL) {
+            error_propagate(errp, err);
+            return;
+        }
+    }
 
     /*
      * Tell the CPU where the NVIC is; it will fail realize if it doesn't
@@ -250,6 +258,8 @@ static Property armv7m_properties[] = {
     DEFINE_PROP_LINK("idau", ARMv7MState, idau, TYPE_IDAU_INTERFACE, Object *),
     DEFINE_PROP_UINT32("init-svtor", ARMv7MState, init_svtor, 0),
     DEFINE_PROP_BOOL("enable-bitband", ARMv7MState, enable_bitband, false),
+    DEFINE_PROP_BOOL("start-powered-off", ARMv7MState, start_powered_off,
+                     false),
     DEFINE_PROP_END_OF_LIST(),
 };
 

diff --git a/include/hw/arm/armv7m.h b/include/hw/arm/armv7m.h
index 2ba24953b633185da610efeba4beefc541ac38d4..e96a98f80931aa19fbbcc2239b35a7eb589a1891 100644 (file)
--- a/include/hw/arm/armv7m.h
+++ b/include/hw/arm/armv7m.h
@@ -65,6 +65,7 @@ typedef struct ARMv7MState {
     Object *idau;
     uint32_t init_svtor;
     bool enable_bitband;
+    bool start_powered_off;
 } ARMv7MState;
 
 #endif