- Implement RISC-V DxeIpl.
- Provide DxeIpl platform implementation-specifc library for RISC-V platform.
Two libraries are provided in this commit,
* Defualt library which simply switch stack and transfer
control to DXE core.
* Switch stack, privilege mode and then transfer control to
DXE core through RISC-V opensbi.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Abner Chang <abner.ch...@hpe.com>
---
MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf | 13 +++-
MdeModulePkg/Core/DxeIplPeim/RiscV64/DxeLoadFunc.c | 76 ++++++++++++++++++++++
2 files changed, 88 insertions(+), 1 deletion(-)
create mode 100644 MdeModulePkg/Core/DxeIplPeim/RiscV64/DxeLoadFunc.c
diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
index 98bc17f..5532323 100644
--- a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
+++ b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
@@ -7,6 +7,7 @@
#
# Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+# Copyright (c) 2016 - 2019, Hewlett Packard Enterprise Development LP. All
rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -25,7 +26,7 @@
#
# The following information is for reference only and not required by the
build tools.
#
-# VALID_ARCHITECTURES = IA32 X64 EBC (EBC is for build only) AARCH64
+# VALID_ARCHITECTURES = IA32 X64 EBC (EBC is for build only)
AARCH64 RISCV64
#
[Sources]
@@ -49,6 +50,9 @@
[Sources.ARM, Sources.AARCH64]
Arm/DxeLoadFunc.c
+[Sources.RISCV64]
+ RiscV64/DxeLoadFunc.c
+
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
@@ -56,6 +60,9 @@
[Packages.ARM, Packages.AARCH64]
ArmPkg/ArmPkg.dec
+[Packages.RISCV64]
+ RiscVPkg/RiscVPkg.dec
+
[LibraryClasses]
PcdLib
MemoryAllocationLib
@@ -75,6 +82,10 @@
[LibraryClasses.ARM, LibraryClasses.AARCH64]
ArmMmuLib
+[LibraryClasses.RISCV64]
+ RiscVPlatformDxeIplLib
+ RiscVOpensbiLib
+
[Ppis]
gEfiDxeIplPpiGuid ## PRODUCES
gEfiPeiDecompressPpiGuid ## PRODUCES
diff --git a/MdeModulePkg/Core/DxeIplPeim/RiscV64/DxeLoadFunc.c
b/MdeModulePkg/Core/DxeIplPeim/RiscV64/DxeLoadFunc.c
new file mode 100644
index 0000000..934dfa5
--- /dev/null
+++ b/MdeModulePkg/Core/DxeIplPeim/RiscV64/DxeLoadFunc.c
@@ -0,0 +1,76 @@
+/** @file
+ RISC-V specific functionality for DxeLoad.
+
+ Copyright (c) 2016 - 2019, Hewlett Packard Enterprise Development LP. All
rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+
+#include "DxeIpl.h"
+#include "Library/RiscVPlatformDxeIpl.h"
+
+typedef
+VOID*
+(EFIAPI *DXEENTRYPOINT) (
+ IN VOID *HobStart
+ );
+
+/**
+ Transfers control to DxeCore.
+
+ This function performs a CPU architecture specific operations to execute
+ the entry point of DxeCore with the parameters of HobList.
+ It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.
+
+ @param DxeCoreEntryPoint The entry point of DxeCore.
+ @param HobList The start of HobList passed to DxeCore.
+
+**/
+VOID
+HandOffToDxeCore (
+ IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
+ IN EFI_PEI_HOB_POINTERS HobList
+ )
+{
+ VOID *BaseOfStack;
+ VOID *TopOfStack;
+ EFI_STATUS Status;
+ //
+ //
+ // Allocate 128KB for the Stack
+ //
+ BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
+ ASSERT (BaseOfStack != NULL);
+
+ //
+ // Compute the top of the stack we were allocated. Pre-allocate a UINTN
+ // for safety.
+ //
+ TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE)
* EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
+ TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
+
+ //
+ // End of PEI phase signal
+ //
+ Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Update the contents of BSP stack HOB to reflect the real stack info
passed to DxeCore.
+ //
+ UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, STACK_SIZE);
+
+ DEBUG ((EFI_D_INFO, "DXE Core new stack at %x, stack pointer at %x\n",
BaseOfStack, TopOfStack));
+
+ //
+ // Transfer the control to the entry point of DxeCore.
+ //
+ RiscVPlatformHandOffToDxeCore (BaseOfStack, TopOfStack, DxeCoreEntryPoint,
HobList);
+}
+
--
2.7.4
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