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 <maob...@loongson.cn> Cc: Chao Li <lic...@loongson.cn> Cc: Leif Lindholm <quic_llind...@quicinc.com> Cc: Liming Gao <gaolim...@byosoft.com.cn> Cc: Michael D Kinney <michael.d.kin...@intel.com> Signed-off-by: xianglai li <lixiang...@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 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#96274): https://edk2.groups.io/g/devel/message/96274 Mute This Topic: https://groups.io/mt/94955171/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-