REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076
This is mostly copied from
edk2-platforms/Platform/RISC-V/PlatformPkg/Library/ResetSystemLib
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: Rebecca Cran <rebe...@bsdio.com>
Cc: Peter Grehan <gre...@freebsd.org>
Cc: Daniel Schaefer <g...@danielschaefer.me>
Signed-off-by: Sunil V L <suni...@ventanamicro.com>
---
OvmfPkg/Library/ResetSystemLib/BaseResetSystemLib.inf | 6 +
OvmfPkg/Library/ResetSystemLib/DxeResetSystemLib.inf | 9 +-
OvmfPkg/Library/ResetSystemLib/RiscV64/DxeResetShutdown.c | 20 +++
OvmfPkg/Library/ResetSystemLib/RiscV64/ResetSystemLib.c | 128
++++++++++++++++++++
4 files changed, 162 insertions(+), 1 deletion(-)
diff --git a/OvmfPkg/Library/ResetSystemLib/BaseResetSystemLib.inf
b/OvmfPkg/Library/ResetSystemLib/BaseResetSystemLib.inf
index a554c6b68cfe..9b2afc36dd95 100644
--- a/OvmfPkg/Library/ResetSystemLib/BaseResetSystemLib.inf
+++ b/OvmfPkg/Library/ResetSystemLib/BaseResetSystemLib.inf
@@ -25,6 +25,9 @@ [Sources.IA32, Sources.X64]
Ia32X64/BaseResetShutdown.c
Ia32X64/ResetSystemLib.c
+[Sources.RISCV64]
+ RiscV64/ResetSystemLib.c
+
[Packages]
MdeModulePkg/MdeModulePkg.dec
MdePkg/MdePkg.dec
@@ -36,3 +39,6 @@ [LibraryClasses]
IoLib
PciLib
TimerLib
+
+[LibraryClasses.RISCV64]
+ RiscVSbiLib
diff --git a/OvmfPkg/Library/ResetSystemLib/DxeResetSystemLib.inf
b/OvmfPkg/Library/ResetSystemLib/DxeResetSystemLib.inf
index acf9c6a93552..c012a163c61a 100644
--- a/OvmfPkg/Library/ResetSystemLib/DxeResetSystemLib.inf
+++ b/OvmfPkg/Library/ResetSystemLib/DxeResetSystemLib.inf
@@ -20,13 +20,17 @@ [Defines]
# The following information is for reference only and not required by the build
# tools.
#
-# VALID_ARCHITECTURES = IA32 X64
+# VALID_ARCHITECTURES = IA32 X64 RISCV64
#
[Sources.IA32, Sources.X64]
Ia32X64/DxeResetShutdown.c
Ia32X64/ResetSystemLib.c
+[Sources.RISCV64]
+ RiscV64/ResetSystemLib.c
+ RiscV64/DxeResetShutdown.c
+
[Packages]
MdeModulePkg/MdeModulePkg.dec
MdePkg/MdePkg.dec
@@ -39,5 +43,8 @@ [LibraryClasses]
PcdLib
TimerLib
+[LibraryClasses.RISCV64]
+ RiscVSbiLib
+
[Pcd]
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId ## CONSUMES
diff --git a/OvmfPkg/Library/ResetSystemLib/RiscV64/DxeResetShutdown.c
b/OvmfPkg/Library/ResetSystemLib/RiscV64/DxeResetShutdown.c
new file mode 100644
index 000000000000..027e235cad11
--- /dev/null
+++ b/OvmfPkg/Library/ResetSystemLib/RiscV64/DxeResetShutdown.c
@@ -0,0 +1,20 @@
+/** @file
+ DXE Reset System Library Shutdown API implementation for OVMF.
+
+ Copyright (C) 2020, Red Hat, Inc.
+ Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h> // CpuDeadLoop()
+#include <Library/ResetSystemLib.h> // ResetShutdown()
+
+EFI_STATUS
+EFIAPI
+DxeResetInit (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/Library/ResetSystemLib/RiscV64/ResetSystemLib.c
b/OvmfPkg/Library/ResetSystemLib/RiscV64/ResetSystemLib.c
new file mode 100644
index 000000000000..14f7653aa8de
--- /dev/null
+++ b/OvmfPkg/Library/ResetSystemLib/RiscV64/ResetSystemLib.c
@@ -0,0 +1,128 @@
+/** @file
+ Reset System Library functions for RISC-V
+
+ Copyright (c) 2021, Hewlett Packard Development LP. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/ResetSystemLib.h>
+#include <Library/BaseRiscVSbiLib.h>
+
+/**
+ This function causes a system-wide reset (cold reset), in which
+ all circuitry within the system returns to its initial state. This type of
reset
+ is asynchronous to system operation and operates without regard to
+ cycle boundaries.
+
+ If this function returns, it means that the system does not support cold
reset.
+**/
+VOID
+EFIAPI
+ResetCold (
+ VOID
+ )
+{
+ // Warm Reset via SBI ecall
+ SbiSystemReset (SBI_SRST_RESET_TYPE_COLD_REBOOT, SBI_SRST_RESET_REASON_NONE);
+}
+
+/**
+ This function causes a system-wide initialization (warm reset), in which all
processors
+ are set to their initial state. Pending cycles are not corrupted.
+
+ If this function returns, it means that the system does not support warm
reset.
+**/
+VOID
+EFIAPI
+ResetWarm (
+ VOID
+ )
+{
+ // Warm Reset via SBI ecall
+ SbiSystemReset (SBI_SRST_RESET_TYPE_WARM_REBOOT, SBI_SRST_RESET_REASON_NONE);
+}
+
+/**
+ This function causes the system to enter a power state equivalent
+ to the ACPI G2/S5 or G3 states.
+
+ If this function returns, it means that the system does not support shutdown
reset.
+**/
+VOID
+EFIAPI
+ResetShutdown (
+ VOID
+ )
+{
+ // Shut down via SBI ecall
+ SbiSystemReset (SBI_SRST_RESET_TYPE_SHUTDOWN, SBI_SRST_RESET_REASON_NONE);
+}
+
+/**
+ This function causes a systemwide reset. The exact type of the reset is
+ defined by the EFI_GUID that follows the Null-terminated Unicode string
passed
+ into ResetData. If the platform does not recognize the EFI_GUID in ResetData
+ the platform must pick a supported reset type to perform. The platform may
+ optionally log the parameters from any non-normal reset that occurs.
+
+ @param[in] DataSize The size, in bytes, of ResetData.
+ @param[in] ResetData The data buffer starts with a Null-terminated string,
+ followed by the EFI_GUID.
+**/
+VOID
+EFIAPI
+ResetPlatformSpecific (
+ IN UINTN DataSize,
+ IN VOID *ResetData
+ )
+{
+ //
+ // Can map to OpenSBI vendor or platform specific reset type.
+ //
+ return;
+}
+
+/**
+ The ResetSystem function resets the entire platform.
+
+ @param[in] ResetType The type of reset to perform.
+ @param[in] ResetStatus The status code for the reset.
+ @param[in] DataSize The size, in bytes, of ResetData.
+ @param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
EfiResetShutdown
+ the data buffer starts with a Null-terminated
string, optionally
+ followed by additional binary data. The string is
a description
+ that the caller may use to further indicate the
reason for the
+ system reset.
+**/
+VOID
+EFIAPI
+ResetSystem (
+ IN EFI_RESET_TYPE ResetType,
+ IN EFI_STATUS ResetStatus,
+ IN UINTN DataSize,
+ IN VOID *ResetData OPTIONAL
+ )
+{
+ switch (ResetType) {
+ case EfiResetWarm:
+ ResetWarm ();
+ break;
+
+ case EfiResetCold:
+ ResetCold ();
+ break;
+
+ case EfiResetShutdown:
+ ResetShutdown ();
+ return;
+
+ case EfiResetPlatformSpecific:
+ ResetPlatformSpecific (DataSize, ResetData);
+ return;
+
+ default:
+ return;
+ }
+}
--
2.38.0
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