[edk2-devel] [edk2-platforms][PATCH V5 03/15] Platform/Loongson: Add PeiServicesTablePointerLib.
xianglai
lixianglai at loongson.cn
Fri Nov 11 08:25:09 UTC 2022
Use a register to save PeiServicesTable pointer,
This lib Provides PeiServicesTable pointer saving
and retrieval services.
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4054
Cc: Bibo Mao <maobibo at loongson.cn>
Cc: Chao Li <lichao at loongson.cn>
Cc: Leif Lindholm <quic_llindhol at quicinc.com>
Cc: Liming Gao <gaoliming at byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney at intel.com>
Signed-off-by: xianglai li <lixianglai at loongson.cn>
---
.../PeiServicesTablePointer.c | 79 +++++++++++++++++++
.../PeiServicesTablePointer.h | 39 +++++++++
.../PeiServicesTablePointerLib.S | 40 ++++++++++
.../PeiServicesTablePointerLib.inf | 32 ++++++++
4 files changed, 190 insertions(+)
create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.h
create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.S
create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
diff --git a/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
new file mode 100644
index 0000000000..204def3bde
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
@@ -0,0 +1,79 @@
+/** @file
+ PEI Services Table Pointer Library.
+
+ Copyright (c) 2022 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Library/PeiServicesTablePointerLib.h>
+#include <Library/DebugLib.h>
+#include "Library/Cpu.h"
+#include "PeiServicesTablePointer.h"
+
+/**
+ Caches a pointer PEI Services Table.
+
+ Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer
+ in a platform specific manner.
+
+ If PeiServicesTablePointer is NULL, then ASSERT ().
+
+ @param PeiServicesTablePointer The address of PeiServices pointer.
+**/
+VOID
+EFIAPI
+SetPeiServicesTablePointer (
+ IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer
+ )
+{
+ LoongarchWriteqKs0 ((UINTN)PeiServicesTablePointer);
+}
+
+/**
+ Retrieves the cached value of the PEI Services Table pointer.
+
+ Returns the cached value of the PEI Services Table pointer in a CPU specific manner
+ as specified in the CPU binding section of the Platform Initialization Pre-EFI
+ Initialization Core Interface Specification.
+
+ If the cached PEI Services Table pointer is NULL, then ASSERT ().
+
+ @return The pointer to PeiServices.
+**/
+CONST EFI_PEI_SERVICES **
+EFIAPI
+GetPeiServicesTablePointer (
+ VOID
+ )
+{
+ UINTN val;
+
+ LoongarchReadqKs0 (&val);
+
+ return (CONST EFI_PEI_SERVICES **)val;
+}
+
+/**
+Perform CPU specific actions required to migrate the PEI Services Table
+pointer from temporary RAM to permanent RAM.
+
+For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes
+immediately preceding the Interrupt Descriptor Table (IDT) in memory.
+For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes
+immediately preceding the Interrupt Descriptor Table (IDT) in memory.
+For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in
+a dedicated CPU register. This means that there is no memory storage
+associated with storing the PEI Services Table pointer, so no additional
+migration actions are required for Itanium or ARM CPUs.
+*/
+VOID
+EFIAPI
+MigratePeiServicesTablePointer (
+VOID
+)
+{
+ return;
+}
diff --git a/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.h b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.h
new file mode 100644
index 0000000000..5bcbc810d0
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.h
@@ -0,0 +1,39 @@
+/** @file
+ PeiServicesTablePointer
+
+ Copyright (c) 2022 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef PEISERVICESTABLEPOINTER_H_
+#define PEISERVICESTABLEPOINTER_H_
+
+/**
+ Write Csr KS0 register.
+
+ @param A0 The value used to write to the KS0 register
+
+ @retval none
+**/
+extern
+VOID
+LoongarchWriteqKs0 (
+ IN UINT64 Val
+ );
+
+/**
+ Read Csr KS0 register.
+
+ @param Val Pointer to the variable used to store the KS0 register value
+
+ @retval none
+**/
+extern
+VOID
+LoongarchReadqKs0 (
+ IN UINT64 *Val
+ );
+
+#endif // PEISERVICESTABLEPOINTER_H_
diff --git a/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.S b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.S
new file mode 100644
index 0000000000..7c6170c5d6
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.S
@@ -0,0 +1,40 @@
+#------------------------------------------------------------------------------
+#
+# Timer Cfg for LoongArch
+#
+# Copyright (c) 2022 Loongson Technology Corporation Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+
+#ifndef __ASSEMBLY__
+#define __ASSEMBLY__
+#endif
+
+#include "Library/Cpu.h"
+
+ASM_GLOBAL ASM_PFX(LoongarchWriteqKs0)
+ASM_GLOBAL ASM_PFX(LoongarchReadqKs0)
+
+#
+# Write Csr KS0 register.
+# @param A0 The value used to write to the KS0 register
+# @retval none
+#
+
+ASM_PFX(LoongarchWriteqKs0):
+ csrwr A0, LOONGARCH_CSR_KS0
+ jirl ZERO, RA,0
+
+#
+# Write Csr KS0 register.
+# @param A0 Pointer to the variable used to store the KS0 register value
+# @retval none
+#
+
+ASM_PFX(LoongarchReadqKs0):
+ csrrd T0, LOONGARCH_CSR_KS0
+ stptr.d T0, A0, 0
+ jirl ZERO, RA,0
+ jirl ZERO, RA,0
diff --git a/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
new file mode 100644
index 0000000000..2ab0d53d4c
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
@@ -0,0 +1,32 @@
+## @file
+# PEI Services Table Pointer Library.
+#
+# Copyright (c) 2022 Loongson Technology Corporation Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = PeiServicesTablePointerLib
+ FILE_GUID = C3C9C4ED-EB8A-4548-BE1B-ABB0B6F35B1E
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PeiServicesTablePointerLib|PEIM PEI_CORE SEC
+
+#
+# VALID_ARCHITECTURES = LOONGARCH64
+#
+
+[Sources]
+ PeiServicesTablePointer.c
+ PeiServicesTablePointerLib.S
+
+[Packages]
+ Platform/Loongson/LoongArchQemuPkg/Loongson.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ DebugLib
+
+[Pcd]
--
2.31.1
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