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From: "xianglai" <lixianglai@loongson.cn>
To: devel@edk2.groups.io
Cc: quic_llindhol@quicinc.com, michael.d.kinney@intel.com,
	kraxel@redhat.com, ardb@kernel.org, maobibo@loongson.cn
Subject: [edk2-platforms][PATCH V3 03/16] Platform/Loongson: Add PeiServicesTablePointerLib.
Date: Thu, 29 Sep 2022 15:07:51 +0800	[thread overview]
Message-ID: <2a6a42645879933905052f7546e06b060d0dd71b.1664433514.git.lixianglai@loongson.cn> (raw)
In-Reply-To: <cover.1664433514.git.lixianglai@loongson.cn>

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

Signed-off-by: xianglai li <lixianglai@loongson.cn>
---
 .../PeiServicesTablePointer.c                 | 78 +++++++++++++++++++
 .../PeiServicesTablePointerLib.inf            | 32 ++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
 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..068960d4ce
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
@@ -0,0 +1,78 @@
+/** @file
+  PEI Services Table Pointer Library.
+
+  Copyright (c) 2021 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"
+
+/**
+  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
+  )
+{
+  LOONGARCH_CSR_WRITEQ ((UINTN)PeiServicesTablePointer, LOONGARCH_CSR_KS0);
+}
+
+/**
+  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;
+
+  LOONGARCH_CSR_READQ (val, LOONGARCH_CSR_KS0);
+  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/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
+#  PEI Services Table Pointer Library.
+#
+#  Copyright (c) 2021 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
+
+[Packages]
+  Platform/Loongson/LoongArchQemuPkg/Loongson.dec
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  DebugLib
+
+[Pcd]
+
-- 
2.31.1


  parent reply	other threads:[~2022-09-29  7:08 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-29  7:07 [edk2-platforms][PATCH V3 00/16] Platform: Add Loongson support xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 01/16] Platform/Loongson: Add Serial Port library xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 02/16] Platform/Loongson: Support SEC And Add Readme.md xianglai
2022-09-29  7:07 ` xianglai [this message]
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 04/16] Platform/Loongson: Add QemuFwCfgLib xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 05/16] Platform/Loongson: Add MmuLib xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 06/16] Platform/Loongson: Add StableTimerLib xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 07/16] Platform/Loongson: Support PEI phase xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 08/16] Platform/Loongson: Add CPU DXE driver xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 09/16] Platform/Loongson: Add PciCpuIoDxe driver xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 10/16] Platform/Loongson: Add timer Dxe driver xianglai
2022-09-29  7:07 ` [edk2-platforms][PATCH V3 11/16] Platform/Loongson: Add RealTime Clock lib xianglai
2022-09-29  7:08 ` [edk2-platforms][PATCH V3 12/16] Platform/Loongson: Add Platform Boot Manager Lib xianglai
2022-09-29  7:08 ` [edk2-platforms][PATCH V3 13/16] Platform/Loongson: Add Reset System Lib xianglai
2022-09-29  7:08 ` [edk2-platforms][PATCH V3 14/16] Platform/Loongson: Support Dxe xianglai
2022-09-29  7:08 ` [edk2-platforms][PATCH V3 15/16] Platform/Loongson: Add QemuFlashFvbServicesRuntimeDxe driver xianglai
2022-09-29  7:08 ` [edk2-platforms][PATCH V3 16/16] Platform/Loongson: Support for saving variables to flash xianglai
  -- strict thread matches above, loose matches on Subject: below --
2022-10-14  4:01 [edk2-platforms][PATCH V3 00/16] Platform: Add Loongson support xianglai
2022-10-14  4:01 ` [edk2-platforms][PATCH V3 03/16] Platform/Loongson: Add PeiServicesTablePointerLib xianglai

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