MAX78000: Add GCR to SOC

This commit adds the Global Control Register to
max78000_soc

Signed-off-by: Jackson Donaldson <jcksn@duck.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250704223239.248781-8-jcksn@duck.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 18 insertions, 2 deletions

diff --git a/hw/arm/max78000_soc.c b/hw/arm/max78000_soc.c
index 2f93ab8..45c6088 100644
--- a/hw/arm/max78000_soc.c
+++ b/hw/arm/max78000_soc.c
@@ -30,6 +30,8 @@ static void max78000_soc_initfn(Object *obj)
 
     object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
 
+    object_initialize_child(obj, "gcr", &s->gcr, TYPE_MAX78000_GCR);
+
     for (i = 0; i < MAX78000_NUM_ICC; i++) {
         g_autofree char *name = g_strdup_printf("icc%d", i);
         object_initialize_child(obj, name, &s->icc[i], TYPE_MAX78000_ICC);
@@ -48,7 +50,7 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
 {
     MAX78000State *s = MAX78000_SOC(dev_soc);
     MemoryRegion *system_memory = get_system_memory();
-    DeviceState *dev, *armv7m;
+    DeviceState *dev, *gcrdev, *armv7m;
     SysBusDevice *busdev;
     Error *err = NULL;
     int i;
@@ -69,6 +71,11 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
 
     memory_region_init_ram(&s->sram, NULL, "MAX78000.sram", SRAM_SIZE,
                            &err);
+
+    gcrdev = DEVICE(&s->gcr);
+    object_property_set_link(OBJECT(gcrdev), "sram", OBJECT(&s->sram),
+                                 &err);
+
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -101,19 +108,26 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
     }
 
     for (i = 0; i < MAX78000_NUM_UART; i++) {
+        g_autofree char *link = g_strdup_printf("uart%d", i);
         dev = DEVICE(&(s->uart[i]));
         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), errp)) {
             return;
         }
 
+        object_property_set_link(OBJECT(gcrdev), link, OBJECT(dev),
+                                 &err);
+
         busdev = SYS_BUS_DEVICE(dev);
         sysbus_mmio_map(busdev, 0, max78000_uart_addr[i]);
         sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m,
                                                        max78000_uart_irq[i]));
     }
 
-    create_unimplemented_device("globalControl",        0x40000000, 0x400);
+    dev = DEVICE(&s->gcr);
+    sysbus_realize(SYS_BUS_DEVICE(dev), errp);
+    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0x40000000);
+
     create_unimplemented_device("systemInterface",      0x40000400, 0x400);
     create_unimplemented_device("functionControl",      0x40000800, 0x400);
     create_unimplemented_device("watchdogTimer0",       0x40003000, 0x400);
diff --git a/include/hw/arm/max78000_soc.h b/include/hw/arm/max78000_soc.h
index 57894f0..919aca0 100644
--- a/include/hw/arm/max78000_soc.h
+++ b/include/hw/arm/max78000_soc.h
@@ -11,6 +11,7 @@
 
 #include "hw/or-irq.h"
 #include "hw/arm/armv7m.h"
+#include "hw/misc/max78000_gcr.h"
 #include "hw/misc/max78000_icc.h"
 #include "hw/char/max78000_uart.h"
 #include "qom/object.h"
@@ -35,6 +36,7 @@ struct MAX78000State {
     MemoryRegion sram;
     MemoryRegion flash;
 
+    Max78000GcrState gcr;
     Max78000IccState icc[MAX78000_NUM_ICC];
     Max78000UartState uart[MAX78000_NUM_UART];