generic/starfive: Add Starfive JH7110 platform implementation

Add Starfive JH7110 platform implementation

Signed-off-by: Wei Liang Lim <weiliang.lim@starfivetech.com>
Reviewed-by: Chee Hong Ang <cheehong.ang@starfivetech.com>
Reviewed-by: Jun Liang Tan <junliang.tan@starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

platform/generic/starfive/jh7110.c

@@ -0,0 +1,47 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 StarFive
+ *
+ * Authors:
+ *   Wei Liang Lim <weiliang.lim@starfivetech.com>
+ */
+
+#include <libfdt.h>
+#include <platform_override.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+
+static u32 selected_hartid = -1;
+
+static bool starfive_jh7110_cold_boot_allowed(u32 hartid,
+				   const struct fdt_match *match)
+{
+	if (selected_hartid != -1)
+		return (selected_hartid == hartid);
+
+	return true;
+}
+
+static void starfive_jh7110_fw_init(void *fdt, const struct fdt_match *match)
+{
+	const fdt32_t *val;
+	int len, coff;
+
+	coff = fdt_path_offset(fdt, "/chosen");
+	if (-1 < coff) {
+		val = fdt_getprop(fdt, coff, "starfive,boot-hart-id", &len);
+		if (val && len >= sizeof(fdt32_t))
+			selected_hartid = (u32) fdt32_to_cpu(*val);
+	}
+}
+
+static const struct fdt_match starfive_jh7110_match[] = {
+	{ .compatible = "starfive,jh7110" },
+	{ },
+};
+
+const struct platform_override starfive_jh7110 = {
+	.match_table = starfive_jh7110_match,
+	.cold_boot_allowed = starfive_jh7110_cold_boot_allowed,
+	.fw_init = starfive_jh7110_fw_init,
+};