From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from loongson.cn (loongson.cn [114.242.206.163]) by mx.groups.io with SMTP id smtpd.web12.5452.1646210703958006509 for ; Wed, 02 Mar 2022 00:45:07 -0800 Authentication-Results: mx.groups.io; dkim=missing; spf=pass (domain: loongson.cn, ip: 114.242.206.163, mailfrom: lixianglai@loongson.cn) Received: from localhost.localdomain (unknown [10.2.5.185]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxn89_Lh9i7TkBAA--.6283S5; Wed, 02 Mar 2022 16:44:49 +0800 (CST) From: "xianglai" To: devel@edk2.groups.io Subject: [edk2-platforms][PATCH V1 03/15] Platform/Loongson: Add PeiServicesTablePointerLib. Date: Wed, 2 Mar 2022 03:44:35 -0500 Message-Id: <20220302084447.2991355-4-lixianglai@loongson.cn> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220302084447.2991355-1-lixianglai@loongson.cn> References: <20220302084447.2991355-1-lixianglai@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf9Dxn89_Lh9i7TkBAA--.6283S5 X-Coremail-Antispam: 1UD129KBjvJXoWxZF48AF15Wr18CrW8Xr1xGrg_yoWrZw1fpw 4UGF4kKr45JryIgryYqa15CFW5AFsrCr98Crs7XF15Cw1kAry0qr12vFyFkF1rua1rAw1I gryFkw4Uua4UXF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: 5ol0xt5qjotxo6or00hjvr0hdfq/ Content-Transfer-Encoding: quoted-printable Use a register to save PeiServicesTable pointer, This lib Provides PeiServicesTable pointer saving and retrieval services. Signed-off-by: xianglai li --- .../PeiServicesTablePointer.c | 78 +++++++++++++++++++ .../PeiServicesTablePointerLib.inf | 32 ++++++++ 2 files changed, 110 insertions(+) create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesT= ablePointerLib/PeiServicesTablePointer.c create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesT= ablePointerLib/PeiServicesTablePointerLib.inf diff --git a/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePoi= nterLib/PeiServicesTablePointer.c b/Platform/Loongson/LoongArchQemuPkg/Libr= ary/PeiServicesTablePointerLib/PeiServicesTablePointer.c new file mode 100644 index 0000000000..068960d4ce --- /dev/null +++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib= /PeiServicesTablePointer.c @@ -0,0 +1,78 @@ +/** @file=0D + PEI Services Table Pointer Library.=0D +=0D + Copyright (c) 2021 Loongson Technology Corporation Limited. All rights r= eserved.
=0D +=0D + SPDX-License-Identifier: BSD-2-Clause-Patent=0D +=0D +**/=0D +=0D +#include =0D +#include =0D +#include =0D +#include "Library/Cpu.h"=0D +=0D +/**=0D + Caches a pointer PEI Services Table.=0D +=0D + Caches the pointer to the PEI Services Table specified by PeiServicesTab= lePointer=0D + in a platform specific manner.=0D +=0D + If PeiServicesTablePointer is NULL, then ASSERT ().=0D +=0D + @param PeiServicesTablePointer The address of PeiServices pointer.= =0D +**/=0D +VOID=0D +EFIAPI=0D +SetPeiServicesTablePointer (=0D + IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer=0D + )=0D +{=0D + LOONGARCH_CSR_WRITEQ ((UINTN)PeiServicesTablePointer, LOONGARCH_CSR_KS0)= ;=0D +}=0D +=0D +/**=0D + Retrieves the cached value of the PEI Services Table pointer.=0D +=0D + Returns the cached value of the PEI Services Table pointer in a CPU spec= ific manner=0D + as specified in the CPU binding section of the Platform Initialization P= re-EFI=0D + Initialization Core Interface Specification.=0D +=0D + If the cached PEI Services Table pointer is NULL, then ASSERT ().=0D +=0D + @return The pointer to PeiServices.=0D +**/=0D +CONST EFI_PEI_SERVICES **=0D +EFIAPI=0D +GetPeiServicesTablePointer (=0D + VOID=0D + )=0D +{=0D + UINTN val;=0D +=0D + LOONGARCH_CSR_READQ (val, LOONGARCH_CSR_KS0);=0D + return (CONST EFI_PEI_SERVICES **)val;=0D +}=0D +=0D +/**=0D +Perform CPU specific actions required to migrate the PEI Services Table=0D +pointer from temporary RAM to permanent RAM.=0D +=0D +For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes=0D +immediately preceding the Interrupt Descriptor Table (IDT) in memory.=0D +For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes=0D +immediately preceding the Interrupt Descriptor Table (IDT) in memory.=0D +For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in=0D +a dedicated CPU register. This means that there is no memory storage=0D +associated with storing the PEI Services Table pointer, so no additional=0D +migration actions are required for Itanium or ARM CPUs.=0D +=0D +**/=0D +VOID=0D +EFIAPI=0D +MigratePeiServicesTablePointer (=0D +VOID=0D +)=0D +{=0D + return;=0D +}=0D diff --git a/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePoi= nterLib/PeiServicesTablePointerLib.inf b/Platform/Loongson/LoongArchQemuPkg= /Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf new file mode 100644 index 0000000000..6fe76d1351 --- /dev/null +++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib= /PeiServicesTablePointerLib.inf @@ -0,0 +1,32 @@ +## @file=0D +# PEI Services Table Pointer Library.=0D +#=0D +# Copyright (c) 2021 Loongson Technology Corporation Limited. All rights = reserved.
=0D +#=0D +# SPDX-License-Identifier: BSD-2-Clause-Patent=0D +#=0D +##=0D +[Defines]=0D + INF_VERSION =3D 0x00010005=0D + BASE_NAME =3D PeiServicesTablePointerLib=0D + FILE_GUID =3D C3C9C4ED-EB8A-4548-BE1B-ABB0B6F35B1E= =0D + MODULE_TYPE =3D PEIM=0D + VERSION_STRING =3D 1.0=0D + LIBRARY_CLASS =3D PeiServicesTablePointerLib|PEIM PEI_C= ORE SEC=0D +=0D +#=0D +# VALID_ARCHITECTURES =3D LOONGARCH64=0D +#=0D +=0D +[Sources]=0D + PeiServicesTablePointer.c=0D +=0D +[Packages]=0D + Platform/Loongson/LoongArchQemuPkg/Loongson.dec=0D + MdePkg/MdePkg.dec=0D +=0D +[LibraryClasses]=0D + DebugLib=0D +=0D +[Pcd]=0D +=0D --=20 2.27.0