Add rpi4 genet driver

.reuse/dep5

@@ -23,6 +23,7 @@ Files:
     drivers/blk/virtio/config.json
     drivers/i2c/meson/config.json
     drivers/i2c/opentitan/config.json
+    drivers/network/genet/config.json
     drivers/network/imx/config.json
     drivers/network/meson/config.json
     drivers/network/virtio/mmio/config.json

ci/matrix.py

@@ -99,6 +99,7 @@ def listify(s: str | Sequence[str]) -> Sequence[str]:
             "qemu_virt_aarch64",
             "qemu_virt_riscv64",
             "rock3b",
+            "rpi4b_1gb",
             "star64",
             "x86_64_generic",
         ],

drivers/network/genet/config.json

@@ -0,0 +1,32 @@
+{
+    "compatible": [
+        "brcm,bcm2711-genet-v5"
+    ],
+    "resources": {
+        "regions": [
+            {
+                "name": "regs",
+                "perms": "rw",
+                "size": 65536,
+                "dt_index": 0
+            },
+            {
+                "name": "device_rx_ring",
+                "size": 32768
+            },
+            {
+                "name": "device_tx_ring",
+                "size": 32768
+            },
+            {
+                "name": "mbox_message",
+                "size": 32768
+            }
+        ],
+        "irqs": [
+            {
+                "dt_index": 0
+            }
+        ]
+    }
+}

drivers/network/genet/eth_driver.mk

@@ -0,0 +1,27 @@
+#
+# Copyright 2024, UNSW
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Include this snippet in your project Makefile to build
+# the GENET NIC driver
+#
+# NOTES
+#  Generates eth_driver.elf (alternative unique name eth_driver_genet.elf)
+#  Expects libsddf_util_debug.a to be in LIBS
+
+ETHERNET_DRIVER_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
+CHECK_NETDRV_GENET_FLAGS_MD5:=.netdrv_genet_cflags-$(shell echo -- ${CFLAGS} ${CFLAGS_network} | shasum | sed 's/ *-//')
+
+${CHECK_NETDRV_GENET_FLAGS_MD5}:
+	-rm -f .netdrv_genet_cflags-*
+	touch $@
+
+eth_driver_genet.elf: network/genet/ethernet.o libsddf_util.a
+	$(LD) $(LDFLAGS) $^ $(LIBS) -o $@
+
+network/genet/ethernet.o: ${ETHERNET_DRIVER_DIR}/ethernet.c ${CHECK_NETDRV_FLAGS_MD5} | $(SDDF_LIBC_INCLUDE)
+	mkdir -p network/genet
+	${CC} -c ${CFLAGS} ${CFLAGS_network} -I ${ETHERNET_DRIVER_DIR} -o $@ $<
+
+-include genet/ethernet.d