[Qemu-devel] [PATCH v3 13/13] arm: Add Clock peripheral stub to NRF51 SOC

["Steffen Görtz" <contrib@steffen-goertz.de>]

This stubs enables the microbit-micropython firmware to run
on the microbit machine.

Signed-off-by: Steffen Görtz <contrib@steffen-goertz.de>
---
 hw/arm/nrf51_soc.c         | 27 +++++++++++++++++++++++++++
 include/hw/arm/nrf51_soc.h |  1 +
 2 files changed, 28 insertions(+)

diff --git a/hw/arm/nrf51_soc.c b/hw/arm/nrf51_soc.c
index c29b80c0ca..bccf2b9b2c 100644
--- a/hw/arm/nrf51_soc.c
+++ b/hw/arm/nrf51_soc.c
@@ -35,6 +35,26 @@
 
 #define BASE_TO_IRQ(base) ((base >> 12) & 0x1F)
 
+static uint64_t clock_read(void *opaque, hwaddr addr, unsigned int size)
+{
+    qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " [%u]\n",
+                  __func__, addr, size);
+    return 1;
+}
+
+static void clock_write(void *opaque, hwaddr addr, uint64_t data,
+                        unsigned int size)
+{
+    qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " <- 0x%" PRIx64 " [%u]\n",
+                  __func__, addr, data, size);
+}
+
+static const MemoryRegionOps clock_ops = {
+    .read = clock_read,
+    .write = clock_write
+};
+
+
 static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
 {
     NRF51State *s = NRF51_SOC(dev_soc);
@@ -159,6 +179,13 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
                                             BASE_TO_IRQ(base_addr)));
     }
 
+    /* STUB Peripherals */
+    memory_region_init_io(&s->clock, NULL, &clock_ops, NULL,
+                          "nrf51_soc.clock", 0x1000);
+    memory_region_add_subregion_overlap(&s->container,
+                                        NRF51_IOMEM_BASE, &s->clock, -1);
+
+
 
     create_unimplemented_device("nrf51_soc.io", NRF51_IOMEM_BASE,
                                 NRF51_IOMEM_SIZE);
diff --git a/include/hw/arm/nrf51_soc.h b/include/hw/arm/nrf51_soc.h
index 89525dcb39..4610d0c7ae 100644
--- a/include/hw/arm/nrf51_soc.h
+++ b/include/hw/arm/nrf51_soc.h
@@ -40,6 +40,7 @@ typedef struct NRF51State {
     MemoryRegion iomem;
     MemoryRegion sram;
     MemoryRegion flash;
+    MemoryRegion clock;
 
     uint32_t sram_size;
     uint32_t flash_size;
-- 
2.19.1