forked from Mirrors/opensbi
217d5e4880
Instruction TLB can fail to respect a non-global SFENCE thus we need to flush the TLB using SFENCE.VMA x0, x0 See full description of CIP-1200 in Errata_FU740-C000_20210205 from https://www.sifive.com/boards/hifive-unmatched Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
37 lines
953 B
C
37 lines
953 B
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 SiFive
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*
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* Authors:
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* David Abdurachmanov <david.abdurachmanov@sifive.com>
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*/
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#include <platform_override.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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static u64 sifive_fu740_tlbr_flush_limit(const struct fdt_match *match)
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{
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/*
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* Needed to address CIP-1200 errata on SiFive FU740
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* Title: Instruction TLB can fail to respect a non-global SFENCE
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* Workaround: Flush the TLB using SFENCE.VMA x0, x0
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* See Errata_FU740-C000_20210205 from
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* https://www.sifive.com/boards/hifive-unmatched
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*/
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return 0;
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}
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static const struct fdt_match sifive_fu740_match[] = {
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{ .compatible = "sifive,fu740" },
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{ .compatible = "sifive,fu740-c000" },
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{ .compatible = "sifive,hifive-unmatched-a00" },
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{ },
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};
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const struct platform_override sifive_fu740 = {
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.match_table = sifive_fu740_match,
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.tlbr_flush_limit = sifive_fu740_tlbr_flush_limit,
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};
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