arm: rockchip: add support for the quartz64 board

The Pine64 Quartz64 board features the Rockchip RK3566, a reduced but
largely identical version of the RK3568.

Two models (A and B) of the Quartz64 board are envisaged, where
this patch targets the already available model A.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm/boards/pine64-quartz64/lowlevel.c b/arch/arm/boards/pine64-quartz64/lowlevel.c
new file mode 100644
index 0000000000..b295885522
--- /dev/null
+++ b/arch/arm/boards/pine64-quartz64/lowlevel.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <common.h>
+#include <linux/sizes.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/hardware.h>
+#include <mach/atf.h>
+#include <debug_ll.h>
+#include <mach/rockchip.h>
+
+extern char __dtb_rk3566_quartz64_a_start[];
+
+static noinline void start_quartz64(void *fdt)
+{
+	/*
+	 * Image execution starts at 0x0, but this is used for ATF and
+	 * OP-TEE later, so move away from here.
+	 */
+	if (current_el() == 3)
+		relocate_to_adr_full(RK3568_BAREBOX_LOAD_ADDRESS);
+	else
+		relocate_to_current_adr();
+
+	setup_c();
+
+	if (current_el() == 3) {
+		rk3568_lowlevel_init();
+		rk3568_atf_load_bl31(fdt);
+		/* not reached */
+	}
+
+	barebox_arm_entry(RK3568_DRAM_BOTTOM, 0x80000000 - RK3568_DRAM_BOTTOM,
+			  fdt);
+}
+
+ENTRY_FUNCTION(start_quartz64a, r0, r1, r2)
+{
+	start_quartz64(__dtb_rk3566_quartz64_a_start);
+}