Reviewed-by: Chao Li <lic...@loongson.cn> Thanks, Chao --------
On 11ζ 11 2022, at 5:12 δΈε, xianglai li <lixiang...@loongson.cn> wrote: > 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 (#96288): https://edk2.groups.io/g/devel/message/96288 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] -=-=-=-=-=-=-=-=-=-=-=-
