hw/arm: Introduce BCM2838 SoC

Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240226000259.2752893-5-sergey.kambalin@auriga.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/hw/arm/bcm2838_peripherals.c b/hw/arm/bcm2838_peripherals.c
new file mode 100644
index 0000000000..06110c724f
--- /dev/null
+++ b/hw/arm/bcm2838_peripherals.c
@@ -0,0 +1,72 @@
+/*
+ * BCM2838 peripherals emulation
+ *
+ * Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "hw/arm/raspi_platform.h"
+#include "hw/arm/bcm2838_peripherals.h"
+
+/* Lower peripheral base address on the VC (GPU) system bus */
+#define BCM2838_VC_PERI_LOW_BASE 0x7c000000
+
+static void bcm2838_peripherals_init(Object *obj)
+{
+    BCM2838PeripheralState *s = BCM2838_PERIPHERALS(obj);
+    BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_GET_CLASS(obj);
+
+    /* Lower memory region for peripheral devices (exported to the Soc) */
+    memory_region_init(&s->peri_low_mr, obj, "bcm2838-peripherals",
+                       bc->peri_low_size);
+    sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_low_mr);
+
+}
+
+static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
+{
+    BCM2838PeripheralState *s = BCM2838_PERIPHERALS(dev);
+    BCMSocPeripheralBaseState *s_base = BCM_SOC_PERIPHERALS_BASE(dev);
+
+    bcm_soc_peripherals_common_realize(dev, errp);
+
+    /* Map lower peripherals into the GPU address space */
+    memory_region_init_alias(&s->peri_low_mr_alias, OBJECT(s),
+                             "bcm2838-peripherals", &s->peri_low_mr, 0,
+                             memory_region_size(&s->peri_low_mr));
+    memory_region_add_subregion_overlap(&s_base->gpu_bus_mr,
+                                        BCM2838_VC_PERI_LOW_BASE,
+                                        &s->peri_low_mr_alias, 1);
+
+}
+
+static void bcm2838_peripherals_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_CLASS(oc);
+    BCMSocPeripheralBaseClass *bc_base = BCM_SOC_PERIPHERALS_BASE_CLASS(oc);
+
+    bc->peri_low_size = 0x2000000;
+    bc_base->peri_size = 0x1800000;
+    dc->realize = bcm2838_peripherals_realize;
+}
+
+static const TypeInfo bcm2838_peripherals_type_info = {
+    .name = TYPE_BCM2838_PERIPHERALS,
+    .parent = TYPE_BCM_SOC_PERIPHERALS_BASE,
+    .instance_size = sizeof(BCM2838PeripheralState),
+    .instance_init = bcm2838_peripherals_init,
+    .class_size = sizeof(BCM2838PeripheralClass),
+    .class_init = bcm2838_peripherals_class_init,
+};
+
+static void bcm2838_peripherals_register_types(void)
+{
+    type_register_static(&bcm2838_peripherals_type_info);
+}
+
+type_init(bcm2838_peripherals_register_types)