arm: Instantiate NRF51 random number generator

Use RNG in SOC.

Signed-off-by: Steffen Görtz <contrib@steffen-goertz.de>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190103091119.9367-5-stefanha@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 18 insertions, 0 deletions

diff --git a/hw/arm/nrf51_soc.c b/hw/arm/nrf51_soc.c
index 55f8eaa..d2a19b8 100644
--- a/hw/arm/nrf51_soc.c
+++ b/hw/arm/nrf51_soc.c
@@ -86,6 +86,19 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
                        qdev_get_gpio_in(DEVICE(&s->cpu),
                        BASE_TO_IRQ(NRF51_UART_BASE)));
 
+    /* RNG */
+    object_property_set_bool(OBJECT(&s->rng), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+
+    mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0);
+    memory_region_add_subregion_overlap(&s->container, NRF51_RNG_BASE, mr, 0);
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->rng), 0,
+                       qdev_get_gpio_in(DEVICE(&s->cpu),
+                       BASE_TO_IRQ(NRF51_RNG_BASE)));
+
     create_unimplemented_device("nrf51_soc.io", NRF51_IOMEM_BASE,
                                 NRF51_IOMEM_SIZE);
     create_unimplemented_device("nrf51_soc.ficr", NRF51_FICR_BASE,
@@ -110,6 +123,9 @@ static void nrf51_soc_init(Object *obj)
                            TYPE_NRF51_UART);
     object_property_add_alias(obj, "serial0", OBJECT(&s->uart), "chardev",
                               &error_abort);
+
+    sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng),
+                           TYPE_NRF51_RNG);
 }
 
 static Property nrf51_soc_properties[] = {
diff --git a/include/hw/arm/nrf51_soc.h b/include/hw/arm/nrf51_soc.h
index 73fc92e..9e3ba91 100644
--- a/include/hw/arm/nrf51_soc.h
+++ b/include/hw/arm/nrf51_soc.h
@@ -13,6 +13,7 @@
 #include "hw/sysbus.h"
 #include "hw/arm/armv7m.h"
 #include "hw/char/nrf51_uart.h"
+#include "hw/misc/nrf51_rng.h"
 
 #define TYPE_NRF51_SOC "nrf51-soc"
 #define NRF51_SOC(obj) \
@@ -26,6 +27,7 @@ typedef struct NRF51State {
     ARMv7MState cpu;
 
     NRF51UARTState uart;
+    NRF51RNGState rng;
 
     MemoryRegion iomem;
     MemoryRegion sram;