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@@ -0,0 +1,56 @@
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+/*
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+ * SPDX-License-Identifier: BSD-2-Clause
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+ *
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+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
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+ *
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+ * Authors:
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+ * Anup Patel <anup.patel@wdc.com>
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+
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+ Copyright (c) 2021, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
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+
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+ SPDX-License-Identifier: BSD-2-Clause-Patent
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+ */
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+
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+#include <Library/RiscVSpecialPlatformLib.h>
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+#include <sbi_utils/fdt/fdt_helper.h>
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+#include <sbi_utils/fdt/fdt_fixup.h>
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+
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+static u64 sifive_fu540_tlbr_flush_limit(const struct fdt_match *match)
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+{
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+ /*
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+ * The sfence.vma by virtual address does not work on
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+ * SiFive FU540 so we return remote TLB flush limit as zero.
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+ */
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+ return 0;
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+}
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+
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+static int sifive_fu540_fdt_fixup(void *fdt, const struct fdt_match *match)
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+{
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+ /*
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+ * SiFive Freedom U540 has an erratum that prevents S-mode software
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+ * to access a PMP protected region using 1GB page table mapping, so
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+ * always add the no-map attribute on this platform.
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+ */
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+ fdt_reserved_memory_nomap_fixup(fdt);
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+
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+ return 0;
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+}
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+
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+static const struct fdt_match sifive_fu540_match[] = {
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+ { .compatible = "sifive,fu540" },
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+ { .compatible = "sifive,fu540g" },
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+ { .compatible = "sifive,fu540-c000" },
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+ { .compatible = "sifive,hifive-unleashed-a00" },
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+ { },
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+};
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+
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+const struct platform_override sifive_fu540 = {
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+ .match_table = sifive_fu540_match,
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+ .tlbr_flush_limit = sifive_fu540_tlbr_flush_limit,
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+ .fdt_fixup = sifive_fu540_fdt_fixup,
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+};
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+
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+const struct platform_override *special_platforms[] = {
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+ &sifive_fu540,
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+};
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+INTN NumberOfPlaformsInArray = array_size(special_platforms);
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