.../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
Chao:
I add my comments below.
发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Chao Li
发送时间: 2023年12月21日 19:19
收件人: gaoliming <gaoliming@byosoft.com.cn>; devel@edk2.groups.io; 'Michael D Kinney' <michael.d.kinney@intel.com>
抄送: 'Zhiguang Liu' <zhiguang.liu@intel.com>; 'Laszlo Ersek' <lersek@redhat.com>
主题: Re: 回复: 回复: [edk2-devel] [PATCH v4 09/37] MdePkg: Add a new library named PeiServicesTablePointerLibKs0
Hi Liming,
Sorry, I forget to CC you when I submitted the patch that modified the DebugSupport.h, I originally planned to CC you when I submitted V5.
My answer:
Thanks,
Chao
On 2023/12/21 15:16, gaoliming wrote:
Chao:
For the changes in MdePkg, I have two comments here.
1. DebugSupport.h definition is from UEFI spec. Current definitions match the latest spec UEFI2.10. And, current definitions follow the same style to other archs.
I have submit the ECR to USWG(https://mantis.uefi.org/mantis/view.php?id=2431), and the ECR was marked "Added to homework pile" at 12/06/2023 USWG meeting, here is the meeting minutes link: https://members.uefi.org/wg/uswg/mail/thread/9948.
The USWG meeting saied may be V2.11 will release 2024, I'm not sure, so the ECR is code first.
Can I submit the code and merge the code first, and wait for the V2.11 to be release? If we wait for the V2.11 to be release first, I guss we will probably wait a long time. In fact, RISC-V also modified this file when submitting the virtual-machine code, and the code does not match to the V2.10...
So, please help to merge first, please...
[Liming] I understand current situation. Code first process is to add the code implementation in edk2 staging branch. I may suggest to delay this change only. Other changes can be continued to be merged.
Thanks
2. CpuLib.h. The patch removes #if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64), then these APIs are exposed for all archs, but ARM and RISCV don’t support them. So, I suggest to update it as below.
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
==>
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) || defined (MDE_CPU_LOONGARCH64)
Agree, I will fix it in V5.
Thanks
Liming
发件人: Chao Li <mailto:lichao@loongson.cn> <lichao@loongson.cn>
发送时间: 2023年12月20日 9:21
收件人: gaoliming <mailto:gaoliming@byosoft.com.cn> <gaoliming@byosoft.com.cn>; devel@edk2.groups.io <mailto:devel@edk2.groups.io> ; 'Michael D Kinney' <mailto:michael.d.kinney@intel.com> <michael.d.kinney@intel.com>
抄送: 'Zhiguang Liu' <mailto:zhiguang.liu@intel.com> <zhiguang.liu@intel.com>; 'Laszlo Ersek' <mailto:lersek@redhat.com> <lersek@redhat.com>
主题: Re: 回复: [edk2-devel] [PATCH v4 09/37] MdePkg: Add a new library named PeiServicesTablePointerLibKs0
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 <mailto:devel@edk2.groups.io> <mailto: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 <mailto:devel@edk2.groups.io> ; Michael D Kinney <mailto:michael.d.kinney@intel.com> <michael.d.kinney@intel.com>; Liming Gao <mailto:gaoliming@byosoft.com.cn> <gaoliming@byosoft.com.cn>
抄送: Zhiguang Liu <mailto:zhiguang.liu@intel.com> <zhiguang.liu@intel.com>; Laszlo Ersek <mailto:lersek@redhat.com> <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 <mailto:michael.d.kinney@intel.com> <michael.d.kinney@intel.com>
Cc: Liming Gao <mailto:gaoliming@byosoft.com.cn> <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <mailto:zhiguang.liu@intel.com> <zhiguang.liu@intel.com>
Cc: Laszlo Ersek <mailto:lersek@redhat.com> <lersek@redhat.com>
Signed-off-by: Chao Li <mailto:lichao@loongson.cn> <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]
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#112877): https://edk2.groups.io/g/devel/message/112877
Mute This Topic: https://groups.io/mt/103355356/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Liming,
I can use another way to differentiate between interrupts and exceptions
when registering them. In this way, DebugSupport.h doesn't need to be
changed. In UEFI V2.11, I will supplement the excpetion types supported
by edk2, and adjust the max number of interrupts and exceptions.
Last question: can I add some comments in the DebugSupport.h? Of curse,
the annotation to be added doesn't appear in the UEFI V2.10.
Thanks,
Chao
On 2023/12/25 09:33, gaoliming wrote:
>
> Chao:
>
> I add my comments below.
>
> *发件人:*devel@edk2.groups.io <devel@edk2.groups.io> *代表 *Chao Li
> *发送时间:*2023年12月21日19:19
> *收件人:*gaoliming <gaoliming@byosoft.com.cn>; devel@edk2.groups.io;
> 'Michael D Kinney' <michael.d.kinney@intel.com>
> *抄送:*'Zhiguang Liu' <zhiguang.liu@intel.com>; 'Laszlo Ersek'
> <lersek@redhat.com>
> *主题:*Re: 回复: 回复: [edk2-devel] [PATCH v4 09/37] MdePkg: Add a new
> library named PeiServicesTablePointerLibKs0
>
> Hi Liming,
>
> Sorry, I forget to CC you when I submitted the patch that modified the
> DebugSupport.h, I originally planned to CC you when I submitted V5.
>
> My answer:
>
> Thanks,
> Chao
>
> On 2023/12/21 15:16, gaoliming wrote:
>
> Chao:
>
> For the changes in MdePkg, I have two comments here.
>
> 1.DebugSupport.h definition is from UEFI spec. Current definitions
> match the latest spec UEFI2.10. And, current definitions follow
> the same style to other archs.
>
> I have submit the ECR to
> USWG(https://mantis.uefi.org/mantis/view.php?id=2431), and the ECR was
> marked "Added to homework pile" at 12/06/2023 USWG meeting, here is
> the meeting minutes link:
> https://members.uefi.org/wg/uswg/mail/thread/9948.
>
> The USWG meeting saied may be V2.11 will release 2024, I'm not sure,
> so the ECR is code first.
>
> Can I submit the code and merge the code first, and wait for the V2.11
> to be release? If we wait for the V2.11 to be release first, I guss we
> will probably wait a long time. In fact, RISC-V also modified this
> file when submitting the virtual-machine code, and the code does not
> match to the V2.10...
>
> So, please help to merge first, please...
>
> [Liming] I understand current situation. Code first process is to add
> the code implementation in edk2 staging branch. I may suggest to delay
> this change only. Other changes can be continued to be merged.
>
> Thanks
>
> 2.CpuLib.h. The patch removes #if defined (MDE_CPU_IA32) ||
> defined (MDE_CPU_X64), then these APIs are exposed for all archs,
> but ARM and RISCV don’t support them. So, I suggest to update it
> as below.
>
> #if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
>
> è
>
> #if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) || defined
> (MDE_CPU_LOONGARCH64)
>
> Agree, I will fix it in V5.
>
> Thanks
>
> Liming
>
> *发件人:*Chao Li <lichao@loongson.cn> <mailto:lichao@loongson.cn>
> *发送时间:*2023年12月20日9:21
> *收件人:*gaoliming <gaoliming@byosoft.com.cn>
> <mailto:gaoliming@byosoft.com.cn>; devel@edk2.groups.io; 'Michael
> D Kinney' <michael.d.kinney@intel.com>
> <mailto:michael.d.kinney@intel.com>
> *抄送:*'Zhiguang Liu' <zhiguang.liu@intel.com>
> <mailto:zhiguang.liu@intel.com>; 'Laszlo Ersek'
> <lersek@redhat.com> <mailto:lersek@redhat.com>
> *主题:*Re: 回复: [edk2-devel] [PATCH v4 09/37] MdePkg: Add a new
> library named PeiServicesTablePointerLibKs0
>
> 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>
> <mailto: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>
> <mailto:michael.d.kinney@intel.com>; Liming Gao
> <gaoliming@byosoft.com.cn> <mailto:gaoliming@byosoft.com.cn>
> *抄送:*Zhiguang Liu <zhiguang.liu@intel.com>
> <mailto:zhiguang.liu@intel.com>; Laszlo Ersek
> <lersek@redhat.com> <mailto: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>
> <mailto:michael.d.kinney@intel.com>
>
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> <mailto:gaoliming@byosoft.com.cn>
>
> Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> <mailto:zhiguang.liu@intel.com>
>
> Cc: Laszlo Ersek <lersek@redhat.com>
> <mailto:lersek@redhat.com>
>
> Signed-off-by: Chao Li <lichao@loongson.cn>
> <mailto: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]
>
>
>
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#112928): https://edk2.groups.io/g/devel/message/112928
Mute This Topic: https://groups.io/mt/103355356/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
© 2016 - 2024 Red Hat, Inc.