From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by spool.mail.gandi.net (Postfix) with ESMTPS id A03D0940EAD for ; Wed, 20 Dec 2023 01:20:52 +0000 (UTC) DKIM-Signature: a=rsa-sha256; bh=xDMoYxN3vzH1gjvYAR4hn50MANbk21G3fl1ZvFvyeyU=; c=relaxed/simple; d=groups.io; h=Message-ID:Date:MIME-Version:User-Agent:Subject:To:Cc:References:From:In-Reply-To:Precedence:List-Subscribe:List-Help:Sender:List-Id:Mailing-List:Delivered-To:Reply-To:List-Unsubscribe-Post:List-Unsubscribe:Content-Type; s=20140610; t=1703035251; v=1; b=AHzV36DMypqh5zHiuvW2sbCvYKYEXbAVlYvltQ+txBcUbXh+eSfSXvy8OZgLFxER4hXBRj/m 6v8FCkqwWLdlNfCE4V926ab5zgL5MMpmarSsoefG+uZc1WTctjL3bLBl30PXNE0U8bbb4wwElLu Mgmkuld+YojD2TfHJ/4pSs2Y= X-Received: by 127.0.0.2 with SMTP id Ct4dYY7687511xtqz30SWHVj; Tue, 19 Dec 2023 17:20:51 -0800 X-Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by mx.groups.io with SMTP id smtpd.web11.12032.1703035249405902874 for ; Tue, 19 Dec 2023 17:20:50 -0800 X-Received: from loongson.cn (unknown [10.40.24.149]) by gateway (Coremail) with SMTP id _____8CxuehrQYJlQc4CAA--.14168S3; Wed, 20 Dec 2023 09:20:44 +0800 (CST) X-Received: from [10.40.24.149] (unknown [10.40.24.149]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Dxjb5kQYJlUEMBAA--.1307S3; Wed, 20 Dec 2023 09:20:36 +0800 (CST) Message-ID: <515091b3-35d9-44b0-befe-a2874f56ba75@loongson.cn> Date: Wed, 20 Dec 2023 09:20:36 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: =?UTF-8?B?UmU6IOWbnuWkjTogW2VkazItZGV2ZWxdIFtQQVRDSCB2NCAwOS8zN10gTWRlUGtnOiBBZGQgYSBuZXcgbGlicmFyeSBuYW1lZCBQZWlTZXJ2aWNlc1RhYmxlUG9pbnRlckxpYktzMA==?= To: gaoliming , devel@edk2.groups.io, 'Michael D Kinney' Cc: 'Zhiguang Liu' , 'Laszlo Ersek' References: <20231212130932.2467028-1-lichao@loongson.cn> <17A017B459AD36A8.31409@groups.io> <00f401da327c$4c735010$e559f030$@byosoft.com.cn> From: "Chao Li" In-Reply-To: <00f401da327c$4c735010$e559f030$@byosoft.com.cn> X-CM-TRANSID: AQAAf8Dxjb5kQYJlUEMBAA--.1307S3 X-CM-SenderInfo: xolfxt3r6o00pqjv00gofq/1tbiAQAKCGWA-a4KcgAUsZ X-Coremail-Antispam: 1Uk129KBj93XoW3CFWxJF1kKw17Zr48Zw4UJrc_yoWDuw13pw 48GF4ktry5JryIgr1UXa15AFW5Zan7C3s8Cr4vqF18C34DAryjqr12qFyFgF1rZan5Aw1I grWayw48ua48XFcCm3ZEXasCq-sJn29KB7ZKAUJUUUU5529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJaTc02F40Eb7x2x7xS6rWj6F1UMc02F40En4AKxVAvwIkv4cxYr24l5I8C rVAqjxCE14ACF2xKxwAqx4xG64kEw2xG04xIwI0_Jr0_Gr1l5I8CrVCF0I0E4I0vr27v73 VFW2AGmfu7bjvjm3AaLaJ3UjIYCTnIWjp_UUUOs7kC6x804xWl14x267AKxVWUJVW8JwAF c2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII 0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xv wVC0I7IYx2IY6xkF7I0E14v26r4j6F4UM28EF7xvwVC2z280aVAFwI0_Gr0_Cr1l84ACjc xK6I8E87Iv6xkF7I0E14v26r4j6r4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY 07AIYIkI8VC2zVCFFI0UMc02F40Eb7x2x7xS6rWj6F1UMc02F40En4AKxVAvwIkv4cxYr2 4l5I8CrVAqjxCE14ACF2xKxwAqx4xG64kEw2xG04xIwI0_Jr0_Gr1l5I8CrVCF0I0E4I0v r24lYx0E2Ix0cI8IcVAFwI0_Jrv_JF1lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7x kEbVWUJVW8JwACjcxG0xvEwIxGrwCjr7xvwVCIw2I0I7xG6c02F41l42xK82IYc2Ij64vI r41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUGVWUWwC20s026x8Gjc xK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0 cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8V AvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E 14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x07jooGQUUUUU= Precedence: Bulk List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,lichao@loongson.cn List-Unsubscribe-Post: List-Unsubscribe=One-Click List-Unsubscribe: X-Gm-Message-State: EfJZ9XY4SJtm4Hdoijud9D10x7686176AA= Content-Type: multipart/alternative; boundary="------------kjLjciZhj8t86NC0IC1Z8D3F" X-GND-Status: LEGIT Authentication-Results: spool.mail.gandi.net; dkim=pass header.d=groups.io header.s=20140610 header.b=AHzV36DM; dmarc=none; spf=pass (spool.mail.gandi.net: domain of bounce@groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce@groups.io --------------kjLjciZhj8t86NC0IC1Z8D3F Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Liming, Yes, the code branch is in my private repo, here is the link: https://github.com/kilaterlee/edk2/tree/push1102 Thanks, Chao On 2023/12/19 21:07, gaoliming wrote: > > Chao: > >  Is there a branch or pull request for this patch set? I would like to > check how this new library instance be used. > > Thanks > > Liming > > *发件人:*devel@edk2.groups.io *代表 *Chao Li > *发送时间:*2023年12月19日21:01 > *收件人:*devel@edk2.groups.io; Michael D Kinney > ; Liming Gao > *抄送:*Zhiguang Liu ; Laszlo Ersek > > *主题:*Re: [edk2-devel] [PATCH v4 09/37] MdePkg: Add a new library named > PeiServicesTablePointerLibKs0 > > Hi Mike and Liming, > > Can you please review this patch? Thank you! > > Thanks, > Chao > > On 2023/12/12 21:11, Chao Li wrote: > > Adding PeiServicesTablePointerLibKs0 for LoongArch64, which provides > > setting and getting the PEI service table pointer through the CSR KS0 > > register. > > The idea of this library is derived from > > ArmPkg/Library/PeiServicesTablePointerLib/ > > BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584 > > Cc: Michael D Kinney > > > Cc: Liming Gao > > > Cc: Zhiguang Liu > > > Cc: Laszlo Ersek > > Signed-off-by: Chao Li > > > --- > > .../Library/PeiServicesTablePointerLib.h      |  9 +- > > .../PeiServicesTablePointer.c                 | 87 +++++++++++++++++++ > > .../PeiServicesTablePointerLibKs0.inf         | 37 ++++++++ > > .../PeiServicesTablePointerLibKs0.uni         | 20 +++++ > > MdePkg/MdePkg.dsc                             |  3 + > > 5 files changed, 152 insertions(+), 4 deletions(-) > > create mode 100644 > MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c > > create mode 100644 > MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf > > create mode 100644 > MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni > > diff --git a/MdePkg/Include/Library/PeiServicesTablePointerLib.h > b/MdePkg/Include/Library/PeiServicesTablePointerLib.h > > index 61635eff00..f85c38363c 100644 > > --- a/MdePkg/Include/Library/PeiServicesTablePointerLib.h > > +++ b/MdePkg/Include/Library/PeiServicesTablePointerLib.h > > @@ -52,10 +52,11 @@ SetPeiServicesTablePointer ( > >    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. > > +  For Itanium, ARM and LoongArch 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, > ARM and > > +  LoongArch CPUs. > >  **/ > > VOID > > diff --git > a/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c > b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c > > new file mode 100644 > > index 0000000000..2560b232f9 > > --- /dev/null > > +++ > b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c > > @@ -0,0 +1,87 @@ > > +/** @file > > +  PEI Services Table Pointer Library For Reigseter Mechanism. > > + > > +  This library is used for PEIM which does executed from flash > device directly but > > +  executed in memory. > > + > > +  Copyright (c) 2006 - 2010, Intel Corporation. All rights > reserved.
> > +  Copyright (c) 2011 Hewlett-Packard Corporation. All rights > reserved.
> > +  Copyright (c) 2023 Loongson Technology Corporation Limited. All > rights reserved.
> > + > > +  SPDX-License-Identifier: BSD-2-Clause-Patent > > + > > +**/ > > + > > +#include > > +#include > > +#include > > +#include > > + > > +/** > > +  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 > > +  ) > > +{ > > +  ASSERT (PeiServicesTablePointer != NULL); > > +  CsrWrite (LOONGARCH_CSR_KS0, (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 > > +  ) > > +{ > > +  CONST EFI_PEI_SERVICES  **PeiServices; > > + > > +  PeiServices = (CONST EFI_PEI_SERVICES **)(CsrRead > (LOONGARCH_CSR_KS0)); > > +  ASSERT (PeiServices != NULL); > > +  return PeiServices; > > +} > > + > > +/** > > +  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, ARM and LoongArch 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, > ARM and > > +  LoongArch CPUs. > > + > > +**/ > > +VOID > > +EFIAPI > > +MigratePeiServicesTablePointer ( > > +  VOID > > +  ) > > +{ > > +  return; > > +} > > diff --git > a/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf > b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf > > new file mode 100644 > > index 0000000000..e8ecd4616d > > --- /dev/null > > +++ > b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf > > @@ -0,0 +1,37 @@ > > +## @file > > +# Instance of PEI Services Table Pointer Library using register > CSR KS0 for the table pointer. > > +# > > +# PEI Services Table Pointer Library implementation that > retrieves a pointer to the > > +# PEI Services Table from a CPU register. Applies to modules that > execute from > > +# read-only memory. > > +# > > +# Copyright (c) 2007 - 2018, Intel Corporation. All rights > reserved.
> > +# Copyright (c) 2011 Hewlett-Packard Corporation. All rights > reserved.
> > +# Copyright (c) 2023 Loongson Technology Corporation Limited. All > rights reserved.
> > +# > > +#  SPDX-License-Identifier: BSD-2-Clause-Patent > > +# > > +# > > +## > > + > > +[Defines] > > +  INF_VERSION                    = 1.29 > > +  BASE_NAME                      = PeiServicesTablePointerLib > > +  MODULE_UNI_FILE                = PeiServicesTablePointerLibKs0.uni > > +  FILE_GUID                      = > 619950D1-7C5F-EA1B-D6DD-2FF7B0A4A2B7 > > +  MODULE_TYPE                    = PEIM > > +  VERSION_STRING                 = 1.0 > > +  LIBRARY_CLASS                  = > PeiServicesTablePointerLib|PEIM PEI_CORE SEC > > + > > +# > > +#  VALID_ARCHITECTURES           = LOONGARCH64 > > +# > > + > > +[Sources] > > +  PeiServicesTablePointer.c > > + > > +[Packages] > > +  MdePkg/MdePkg.dec > > + > > +[LibraryClasses] > > +  DebugLib > > diff --git > a/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni > b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni > > new file mode 100644 > > index 0000000000..2539448ce5 > > --- /dev/null > > +++ > b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni > > @@ -0,0 +1,20 @@ > > +// /** @file > > +// Instance of PEI Services Table Pointer Library using register > CSR KS0 for the table pointer. > > +// > > +// PEI Services Table Pointer Library implementation that > retrieves a pointer to the > > +// PEI Services Table from a CPU register. Applies to modules > that execute from > > +// read-only memory. > > +// > > +// Copyright (c) 2007 - 2018, Intel Corporation. All rights > reserved.
> > +// Copyright (c) 2011 Hewlett-Packard Corporation. All rights > reserved.
> > +// Copyright (c) 2023 Loongson Technology Corporation Limited. > All rights reserved.
> > +// > > +// SPDX-License-Identifier: BSD-2-Clause-Patent > > +// > > +// **/ > > + > > + > > +#string STR_MODULE_ABSTRACT             #language en-US "Instance > of PEI Services Table Pointer Library using CPU register for the > table pointer" > > + > > +#string STR_MODULE_DESCRIPTION          #language en-US "The PEI > Services Table Pointer Library implementation that retrieves a > pointer to the PEI Services Table from a CPU register. Applies to > modules that execute from read-only memory." > > + > > diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc > > index 3abd1a1e23..109224c527 100644 > > --- a/MdePkg/MdePkg.dsc > > +++ b/MdePkg/MdePkg.dsc > > @@ -200,4 +200,7 @@ > >    > MdePkg/Library/BaseSerialPortLibRiscVSbiLib/BaseSerialPortLibRiscVSbiLib.inf > >    > MdePkg/Library/BaseSerialPortLibRiscVSbiLib/BaseSerialPortLibRiscVSbiLibRam.inf > > +[Components.LOONGARCH64] > > +  > MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf > > + > > [BuildOptions] > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#112736): https://edk2.groups.io/g/devel/message/112736 Mute This Topic: https://groups.io/mt/103261739/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=-=-=-=-=-=-=-=-=-=-=- --------------kjLjciZhj8t86NC0IC1Z8D3F Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit

Hi Liming,

Yes, the code branch is in my private repo, here is the link: https://github.com/kilaterlee/edk2/tree/push1102


Thanks,
Chao
On 2023/12/19 21:07, gaoliming wrote:

Chao:

 Is there a branch or pull request for this patch set? I would like to check how this new library instance be used.

 

Thanks

Liming

发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Chao Li
发送时间: 2023年12月19日 21:01
收件人: devel@edk2.groups.io; Michael D Kinney <michael.d.kinney@intel.com>; Liming Gao <gaoliming@byosoft.com.cn>
抄送: Zhiguang Liu <zhiguang.liu@intel.com>; Laszlo Ersek <lersek@redhat.com>
主题: Re: [edk2-devel] [PATCH v4 09/37] MdePkg: Add a new library named PeiServicesTablePointerLibKs0

 

Hi Mike and Liming,

Can you please review this patch? Thank you!

 

Thanks,
Chao

On 2023/12/12 21:11, Chao Li wrote:

Adding PeiServicesTablePointerLibKs0 for LoongArch64, which provides
setting and getting the PEI service table pointer through the CSR KS0
register.
 
The idea of this library is derived from
ArmPkg/Library/PeiServicesTablePointerLib/
 
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584
 
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
---
 .../Library/PeiServicesTablePointerLib.h      |  9 +-
 .../PeiServicesTablePointer.c                 | 87 +++++++++++++++++++
 .../PeiServicesTablePointerLibKs0.inf         | 37 ++++++++
 .../PeiServicesTablePointerLibKs0.uni         | 20 +++++
 MdePkg/MdePkg.dsc                             |  3 +
 5 files changed, 152 insertions(+), 4 deletions(-)
 create mode 100644 MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c
 create mode 100644 MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf
 create mode 100644 MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni
 
diff --git a/MdePkg/Include/Library/PeiServicesTablePointerLib.h b/MdePkg/Include/Library/PeiServicesTablePointerLib.h
index 61635eff00..f85c38363c 100644
--- a/MdePkg/Include/Library/PeiServicesTablePointerLib.h
+++ b/MdePkg/Include/Library/PeiServicesTablePointerLib.h
@@ -52,10 +52,11 @@ SetPeiServicesTablePointer (
   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.
+  For Itanium, ARM and LoongArch 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, ARM and
+  LoongArch CPUs.
 
 **/
 VOID
diff --git a/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c
new file mode 100644
index 0000000000..2560b232f9
--- /dev/null
+++ b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointer.c
@@ -0,0 +1,87 @@
+/** @file
+  PEI Services Table Pointer Library For Reigseter Mechanism.
+
+  This library is used for PEIM which does executed from flash device directly but
+  executed in memory.
+
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2011 Hewlett-Packard Corporation. All rights reserved.<BR>
+  Copyright (c) 2023 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Library/DebugLib.h>
+#include <Library/PeiServicesTablePointerLib.h>
+#include <Register/LoongArch64/Csr.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
+  )
+{
+  ASSERT (PeiServicesTablePointer != NULL);
+  CsrWrite (LOONGARCH_CSR_KS0, (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
+  )
+{
+  CONST EFI_PEI_SERVICES  **PeiServices;
+
+  PeiServices = (CONST EFI_PEI_SERVICES **)(CsrRead (LOONGARCH_CSR_KS0));
+  ASSERT (PeiServices != NULL);
+  return PeiServices;
+}
+
+/**
+  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, ARM and LoongArch 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, ARM and
+  LoongArch CPUs.
+
+**/
+VOID
+EFIAPI
+MigratePeiServicesTablePointer (
+  VOID
+  )
+{
+  return;
+}
diff --git a/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf
new file mode 100644
index 0000000000..e8ecd4616d
--- /dev/null
+++ b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf
@@ -0,0 +1,37 @@
+## @file
+# Instance of PEI Services Table Pointer Library using register CSR KS0 for the table pointer.
+#
+# PEI Services Table Pointer Library implementation that retrieves a pointer to the
+# PEI Services Table from a CPU register. Applies to modules that execute from
+# read-only memory.
+#
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2011 Hewlett-Packard Corporation. All rights reserved.<BR>
+# Copyright (c) 2023 Loongson Technology Corporation Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 1.29
+  BASE_NAME                      = PeiServicesTablePointerLib
+  MODULE_UNI_FILE                = PeiServicesTablePointerLibKs0.uni
+  FILE_GUID                      = 619950D1-7C5F-EA1B-D6DD-2FF7B0A4A2B7
+  MODULE_TYPE                    = PEIM
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = PeiServicesTablePointerLib|PEIM PEI_CORE SEC
+
+#
+#  VALID_ARCHITECTURES           = LOONGARCH64
+#
+
+[Sources]
+  PeiServicesTablePointer.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  DebugLib
diff --git a/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni
new file mode 100644
index 0000000000..2539448ce5
--- /dev/null
+++ b/MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.uni
@@ -0,0 +1,20 @@
+// /** @file
+// Instance of PEI Services Table Pointer Library using register CSR KS0 for the table pointer.
+//
+// PEI Services Table Pointer Library implementation that retrieves a pointer to the
+// PEI Services Table from a CPU register. Applies to modules that execute from
+// read-only memory.
+//
+// Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+// Copyright (c) 2011 Hewlett-Packard Corporation. All rights reserved.<BR>
+// Copyright (c) 2023 Loongson Technology Corporation Limited. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "Instance of PEI Services Table Pointer Library using CPU register for the table pointer"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "The PEI Services Table Pointer Library implementation that retrieves a pointer to the PEI Services Table from a CPU register. Applies to modules that execute from read-only memory."
+
diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
index 3abd1a1e23..109224c527 100644
--- a/MdePkg/MdePkg.dsc
+++ b/MdePkg/MdePkg.dsc
@@ -200,4 +200,7 @@
   MdePkg/Library/BaseSerialPortLibRiscVSbiLib/BaseSerialPortLibRiscVSbiLib.inf
   MdePkg/Library/BaseSerialPortLibRiscVSbiLib/BaseSerialPortLibRiscVSbiLibRam.inf
 
+[Components.LOONGARCH64]
+  MdePkg/Library/PeiServicesTablePointerLibKs0/PeiServicesTablePointerLibKs0.inf
+
 [BuildOptions]

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