Provide platform_override of U540 platform.
Cc: Sunil V L <suni...@ventanamicro.com>
Cc: Daniel Schaefer <daniel.schae...@hpe.com>
Signed-off-by: Abner Chang <abner.ch...@hpe.com>
---
.../FreedomU540HiFiveUnleashedBoard/U540.dsc | 1 +
.../RiscVSpecialPlatformLib.inf | 36 ++++++++++++
.../RiscVSpecialPlatformLib/SifiveFu540.c | 56 +++++++++++++++++++
3 files changed, 93 insertions(+)
create mode 100644
Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/RiscVSpecialPlatformLib.inf
create mode 100644
Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/SifiveFu540.c
diff --git
a/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/U540.dsc
b/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/U540.dsc
index d12af19825..71dbca0e96 100644
--- a/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/U540.dsc
+++ b/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/U540.dsc
@@ -163,6 +163,7 @@
ReportStatusCodeLib|MdeModulePkg/Library/PeiReportStatusCodeLib/PeiReportStatusCodeLib.inf
ExtractGuidedSectionLib|MdePkg/Library/BaseExtractGuidedSectionLib/BaseExtractGuidedSectionLib.inf
+
RiscVSpecialPlatformLib|Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/RiscVSpecialPlatformLib.inf
!ifdef $(SOURCE_DEBUG_ENABLE)
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgentLib.inf
diff --git
a/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/RiscVSpecialPlatformLib.inf
b/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/RiscVSpecialPlatformLib.inf
new file mode 100644
index 0000000000..26f475ca45
--- /dev/null
+++
b/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/RiscVSpecialPlatformLib.inf
@@ -0,0 +1,36 @@
+## @file
+# Null library instance to provide platform_override for the
+# special RISC-V platform. This module incorporates with
+# OpensbiPlatformLib and RISC-V Opensbi library.
+#
+# Copyright (c) 2021, Hewlett Packard Enterprise Development LP. All rights
reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001b
+ BASE_NAME = RiscVSpecialPlatformLib
+ FILE_GUID = FE0AE3E6-90A4-421D-851D-E092CBEEE645
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = RiscVSpecialPlatformLib|SEC
+
+#
+# The following information is for reference only and not required by the
build tools.
+#
+# VALID_ARCHITECTURES = RISCV64
+#
+
+[Sources]
+ SifiveFu540.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec
+ Silicon/RISC-V/ProcessorPkg/RiscVProcessorPkg.dec
+
+[LibraryClasses]
+ BaseLib
diff --git
a/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/SifiveFu540.c
b/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/SifiveFu540.c
new file mode 100644
index 0000000000..e89403f7ff
--- /dev/null
+++
b/Platform/SiFive/U5SeriesPkg/FreedomU540HiFiveUnleashedBoard/Library/RiscVSpecialPlatformLib/SifiveFu540.c
@@ -0,0 +1,56 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ * Anup Patel <anup.pa...@wdc.com>
+
+ Copyright (c) 2021, Hewlett Packard Enterprise Development LP. All rights
reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+ */
+
+#include <Library/RiscVSpecialPlatformLib.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+#include <sbi_utils/fdt/fdt_fixup.h>
+
+static u64 sifive_fu540_tlbr_flush_limit(const struct fdt_match *match)
+{
+ /*
+ * The sfence.vma by virtual address does not work on
+ * SiFive FU540 so we return remote TLB flush limit as zero.
+ */
+ return 0;
+}
+
+static int sifive_fu540_fdt_fixup(void *fdt, const struct fdt_match *match)
+{
+ /*
+ * SiFive Freedom U540 has an erratum that prevents S-mode software
+ * to access a PMP protected region using 1GB page table mapping, so
+ * always add the no-map attribute on this platform.
+ */
+ fdt_reserved_memory_nomap_fixup(fdt);
+
+ return 0;
+}
+
+static const struct fdt_match sifive_fu540_match[] = {
+ { .compatible = "sifive,fu540" },
+ { .compatible = "sifive,fu540g" },
+ { .compatible = "sifive,fu540-c000" },
+ { .compatible = "sifive,hifive-unleashed-a00" },
+ { },
+};
+
+const struct platform_override sifive_fu540 = {
+ .match_table = sifive_fu540_match,
+ .tlbr_flush_limit = sifive_fu540_tlbr_flush_limit,
+ .fdt_fixup = sifive_fu540_fdt_fixup,
+};
+
+const struct platform_override *special_platforms[] = {
+ &sifive_fu540,
+};
+INTN NumberOfPlaformsInArray = array_size(special_platforms);
--
2.31.1
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