[PATCH 3/7] hw/arm/mps2: Add CMSDK APB watchdog as unimplemented device

[Philippe Mathieu-Daudé]

Register the watchdog peripheral as unimplemented to better
follow its accesses, for example booting Zephyr:

  ----------------
  IN: wdog_cmsdk_apb_init
  0x00000900:  b508       push     {r3, lr}
  0x00000902:  4b07       ldr      r3, [pc, #0x1c]
  0x00000904:  4a07       ldr      r2, [pc, #0x1c]
  0x00000906:  6018       str      r0, [r3]
  0x00000908:  4b07       ldr      r3, [pc, #0x1c]
  0x0000090a:  4808       ldr      r0, [pc, #0x20]
  0x0000090c:  f8c3 2c00  str.w    r2, [r3, #0xc00]
  0x00000910:  4a07       ldr      r2, [pc, #0x1c]
  0x00000912:  6812       ldr      r2, [r2]
  0x00000914:  601a       str      r2, [r3]
  0x00000916:  f000 f9f9  bl       #0xd0c
  cmsdk-apb-watchdog: unimplemented device write (size 4, value 0x1acce551, 
offset 0xc00)
  cmsdk-apb-watchdog: unimplemented device write (size 4, value 0xe4e1c00, 
offset 0x0)

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/arm/mps2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index 1e8d5f21f9..570ec50aa8 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -314,6 +314,7 @@ static void mps2_common_init(MachineState *machine)
     sysbus_connect_irq(SYS_BUS_DEVICE(&mms->dualtimer), 0,
                        qdev_get_gpio_in(armv7m, 10));
     sysbus_mmio_map(SYS_BUS_DEVICE(&mms->dualtimer), 0, 0x40002000);
+    create_unimplemented_device("cmsdk-apb-watchdog", 0x40008000, 0x1000);
 
     sysbus_init_child_obj(OBJECT(mms), "scc", &mms->scc,
                           sizeof(mms->scc), TYPE_MPS2_SCC);
-- 
2.21.3