Add support for rock3b

Signed-off-by: Jakub Duchniewicz <j.duchniewicz@unsw.edu.au>

libsel4/sel4_plat_include/rk3568/sel4/plat/api/constants.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2025, UNSW
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <sel4/config.h>
+
+#if defined(CONFIG_ARM_CORTEX_A55)
+#include <sel4/arch/constants_cortex_a55.h>
+#else
+#error "unsupported core"
+#endif
+

src/plat/rk3568/config.cmake

@@ -0,0 +1,31 @@
+#
+# Copyright 2025, UNSW
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+declare_platform(rk3568 KernelPlatformRock3b PLAT_rk3568 KernelArchARM)
+
+if(KernelPlatformRock3b)
+    declare_seL4_arch(aarch64)
+    set(KernelArmCortexA55 ON)
+    set(KernelArchArmV8a ON)
+    set(KernelArmGicV3 ON)
+    config_set(KernelARMPlatform ARM_PLAT rock3b)
+    list(APPEND KernelDTSList "tools/dts/rock3b.dts")
+    list(APPEND KernelDTSList "src/plat/rk3568/overlay-rock3b.dts")
+
+    declare_default_headers(
+        TIMER_FREQUENCY 24000000
+        MAX_IRQ 283
+        NUM_PPI 32
+        TIMER drivers/timer/arm_generic.h
+        INTERRUPT_CONTROLLER arch/machine/gic_v3.h
+        KERNEL_WCET 10u
+    )
+endif()
+
+add_sources(
+    DEP "KernelPlatformRock3b"
+    CFILES src/arch/arm/machine/gic_v3.c src/arch/arm/machine/l2c_nop.c
+)

src/plat/rk3568/overlay-rock3b.dts

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2025, UNSW
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ */
+
+/ {
+	chosen {
+		seL4,elfloader-devices =
+		    "serial2",
+		    &{/psci},
+		    &{/timer};
+
+		seL4,kernel-devices =
+		    "serial2",
+		    &{/interrupt-controller@fd400000},
+		    &{/timer};
+	};
+
+	memory@00000000 {
+		device_type = "memory";
+        reg = <0x00 0x200000 0x00 0xecc9c000>;
+	};
+};

tools/dts/update-dts.sh

@@ -62,6 +62,7 @@ freescale/fsl-imx8mq-evk=imx8mq-evk
 freescale/fsl-imx8mm-evk=imx8mm-evk
 rockchip/rk3399-rockpro64=rockpro64
 rockchip/rk3566-quartz64-a=quartz64
+rockchip/rk3568-rock3b=rock3b
 broadcom/bcm2711-rpi-4-b=rpi4
 avnet/maaxboard=maaxboard
 "