1 files changed, 36 insertions, 0 deletions
diff --git a/platform/generic/sifive_fu740.c b/platform/generic/sifive_fu740.c
new file mode 100644
index 0000000..c8325d3
--- /dev/null
+++ b/platform/generic/sifive_fu740.c
@@ -0,0 +1,36 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2021 SiFive
+ *
+ * Authors:
+ *   David Abdurachmanov <david.abdurachmanov@sifive.com>
+ */
+
+#include <platform_override.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+#include <sbi_utils/fdt/fdt_fixup.h>
+
+static u64 sifive_fu740_tlbr_flush_limit(const struct fdt_match *match)
+{
+	/*
+	 * Needed to address CIP-1200 errata on SiFive FU740
+	 * Title: Instruction TLB can fail to respect a non-global SFENCE
+	 * Workaround: Flush the TLB using SFENCE.VMA x0, x0
+	 * See Errata_FU740-C000_20210205 from
+	 * https://www.sifive.com/boards/hifive-unmatched
+	 */
+	return 0;
+}
+
+static const struct fdt_match sifive_fu740_match[] = {
+	{ .compatible = "sifive,fu740" },
+	{ .compatible = "sifive,fu740-c000" },
+	{ .compatible = "sifive,hifive-unmatched-a00" },
+	{ },
+};
+
+const struct platform_override sifive_fu740 = {
+	.match_table = sifive_fu740_match,
+	.tlbr_flush_limit = sifive_fu740_tlbr_flush_limit,
+};