Hi Marc,
Please send the patch to the devel@edk2.groups.io. There are two ways to do
this:
1. add below info in the .gitconfig. It would help to send to the email address
every time you use 'git send-email *.patch'.
[sendemail]
to = devel@edk2.groups.io
2. add the email address every time you send patch. i.e. 'git send-email
*.patch --to devel@edk2.groups.io'
I prefer #1.
Thanks,
Zhichao
> -----Original Message-----
> From: Marc Moisson <marc.moisson-franckhau...@arm.com>
> Sent: Monday, August 17, 2020 6:09 PM
> To: marc.moisson-franckhau...@arm.com
> Cc: n...@arm.com; Ni, Ray <ray...@intel.com>; Gao, Zhichao
> <zhichao....@intel.com>; matteo.carl...@arm.com;
> guillaume.letell...@arm.com; sami.muja...@arm.com
> Subject: [PATCH v1-resend 1/1] ShellPkg/AcpiView: PCCT Parser
>
> Create a new parser for the PCCT Table.
>
> The PCCT Table is used to describe how the OSPM can communicate with
>
> entities outside the platform. It describes which
>
> memory spaces correspond to which entity as well as a few of the
>
> needed information to handle the communications.
>
> This new PCCT parser dumps the values and names of the table fields. It
>
> also performs some validation on the table's fields.
>
>
>
> Signed-off-by: Marc Moisson-Franckhauser <marc.moisson-
> franckhau...@arm.com>
>
> ---
>
>
>
> The changes can be seen at
> https://github.com/AurelienMoisson/edk2/tree/840_acpiview_pcct_parser_v1
>
>
>
> ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.h
> | 24 +-
>
> ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiTableParser.h
> | 4
> +-
>
> ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.c
> |
> 488 ++++++++++++++++++++
>
> ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.h
> |
> 33 ++
>
>
> ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLib.c
> | 4 +-
>
>
> ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLib.i
> nf | 4 +-
>
> 6 files changed, 552 insertions(+), 5 deletions(-)
>
>
>
> diff --git a/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.h
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.h
>
> index
> f81ccac7e118378aa185db4b625e5bcd75f78347..7ed9cb5b7d8ff8f448f4893eebf8
> ddd744ccbf4b 100644
>
> --- a/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.h
>
> +++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.h
>
> @@ -1,7 +1,7 @@
>
> /** @file
>
> Header file for ACPI parser
>
>
>
> - Copyright (c) 2016 - 2020, ARM Limited. All rights reserved.
>
> + Copyright (c) 2016 - 2020, Arm Limited. All rights reserved.
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> **/
>
>
>
> @@ -670,6 +670,28 @@ ParseAcpiMcfg (
>
> IN UINT8 AcpiTableRevision
>
> );
>
>
>
> +/**
>
> + This function parses the ACPI PCCT table including its sub-structures of
> type
>
> + 0 through 4.
>
> + When trace is enabled this function parses the PCCT table and
>
> + traces the ACPI table fields.
>
> +
>
> + This function also performs validation of the ACPI table fields.
>
> +
>
> + @param [in] Trace If TRUE, trace the ACPI fields.
>
> + @param [in] Ptr Pointer to the start of the buffer.
>
> + @param [in] AcpiTableLength Length of the ACPI table.
>
> + @param [in] AcpiTableRevision Revision of the ACPI table.
>
> +**/
>
> +VOID
>
> +EFIAPI
>
> +ParseAcpiPcct (
>
> + IN BOOLEAN Trace,
>
> + IN UINT8* Ptr,
>
> + IN UINT32 AcpiTableLength,
>
> + IN UINT8 AcpiTableRevision
>
> + );
>
> +
>
> /**
>
> This function parses the ACPI PPTT table.
>
> When trace is enabled this function parses the PPTT table and
>
> diff --git a/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiTableParser.h
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiTableParser.h
>
> index
> 4f92596b90a6ee422d8d0959881015ffd3de4da0..0ebf79fb653ae3a8190273aee4
> 52723c6213eb58 100644
>
> --- a/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiTableParser.h
>
> +++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiTableParser.h
>
> @@ -1,7 +1,7 @@
>
> /** @file
>
> Header file for ACPI table parser
>
>
>
> - Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
>
> + Copyright (c) 2016 - 2020, Arm Limited. All rights reserved.
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> **/
>
>
>
> @@ -11,7 +11,7 @@
>
> /**
>
> The maximum number of ACPI table parsers.
>
> */
>
> -#define MAX_ACPI_TABLE_PARSERS 16
>
> +#define MAX_ACPI_TABLE_PARSERS 32
>
>
>
> /** An invalid/NULL signature value.
>
> */
>
> diff --git
> a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.c
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.c
>
> new file mode 100644
>
> index
> 0000000000000000000000000000000000000000..80cd35bb8fc6f1ece56fc3089d
> e090687a836a1f
>
> --- /dev/null
>
> +++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.c
>
> @@ -0,0 +1,488 @@
>
> +/** @file
>
> + PCCT table parser
>
> +
>
> + Copyright (c) 2020, Arm Limited.
>
> + SPDX-License-Identifier: BSD-2-Clause-Patent
>
> +
>
> + @par Reference(s):
>
> + - ACPI 6.3 Specification - January 2019
>
> +**/
>
> +
>
> +#include <Library/PrintLib.h>
>
> +#include <Library/UefiLib.h>
>
> +#include "AcpiParser.h"
>
> +#include "AcpiView.h"
>
> +#include "AcpiViewConfig.h"
>
> +#include "PcctParser.h"
>
> +
>
> +// Local variables
>
> +STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
>
> +
>
> +STATIC UINT8* PccSubspaceLength;
>
> +STATIC UINT8* PccSubspaceType;
>
> +
>
> +/**
>
> + This function validates the length coded on 4 bytes of a shared memory
> range
>
> +
>
> + @param [in] Ptr Pointer to the start of the field data.
>
> + @param [in] Context Pointer to context specific information e.g. this
>
> + could be a pointer to the ACPI table header.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +EFIAPI
>
> +ValidateRangeLength4 (
>
> + IN UINT8* Ptr,
>
> + IN VOID* Context
>
> + )
>
> +{
>
> + if (*(UINT32*)Ptr < MIN_EXT_PCC_SUBSPACE_MEM_RANGE_LEN) {
>
> + IncrementErrorCount ();
>
> + Print (
>
> + L"\nError: Shared memory range length is too short.\n"
>
> + L"Length of: %u when it should be over or equal to %u",
>
> + *(UINT32*)Ptr,
>
> + MIN_EXT_PCC_SUBSPACE_MEM_RANGE_LEN
>
> + );
>
> + }
>
> +}
>
> +
>
> +/**
>
> + This function validates the length coded on 8 bytes of a shared memory
> range
>
> +
>
> + @param [in] Ptr Pointer to the start of the field data.
>
> + @param [in] Context Pointer to context specific information e.g. this
>
> + could be a pointer to the ACPI table header.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +EFIAPI
>
> +ValidateRangeLength8 (
>
> + IN UINT8* Ptr,
>
> + IN VOID* Context
>
> + )
>
> +{
>
> + if (*(UINT64*)Ptr <= MIN_MEMORY_RANGE_LENGTH) {
>
> + IncrementErrorCount ();
>
> + Print (
>
> + L"\nError: Shared memory range length is too short.\n"
>
> + L"Length of: %u when it should be over %u",
>
> + *(UINT64*)Ptr,
>
> + MIN_MEMORY_RANGE_LENGTH
>
> + );
>
> + }
>
> +}
>
> +
>
> +/**
>
> + This function validates address space for type 0 structure.
>
> +
>
> + @param [in] Ptr Pointer to the start of the field data.
>
> + @param [in] Context Pointer to context specific information e.g. this
>
> + could be a pointer to the ACPI table header.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +EFIAPI
>
> +ValidatePccType0Gas (
>
> + IN UINT8* Ptr,
>
> + IN VOID* Context
>
> + )
>
> +{
>
> + switch (*(UINT8*)Ptr) {
>
> +#if !(defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64))
>
> + case EFI_ACPI_6_3_SYSTEM_IO:
>
> +#endif //if not (defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64))
>
> + case EFI_ACPI_6_3_SYSTEM_MEMORY:
>
> + return;
>
> + default:
>
> + IncrementErrorCount ();
>
> + Print (L"\nError: Invalid address space");
>
> + }
>
> +}
>
> +
>
> +/**
>
> + This function validates address space for structures of types other than 0.
>
> +
>
> + @param [in] Ptr Pointer to the start of the field data.
>
> + @param [in] Context Pointer to context specific information e.g. this
>
> + could be a pointer to the ACPI table header.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +EFIAPI
>
> +ValidatePccGas (
>
> + IN UINT8* Ptr,
>
> + IN VOID* Context
>
> + )
>
> +{
>
> + switch (*(UINT8*)Ptr) {
>
> +#if !(defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64))
>
> + case EFI_ACPI_6_3_SYSTEM_IO:
>
> +#endif //if not (defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64))
>
> + case EFI_ACPI_6_3_FUNCTIONAL_FIXED_HARDWARE:
>
> + case EFI_ACPI_6_3_SYSTEM_MEMORY:
>
> + return;
>
> + default:
>
> + IncrementErrorCount ();
>
> + Print (L"\nError: Invalid address space");
>
> + }
>
> +}
>
> +
>
> +/**
>
> + An ACPI_PARSER array describing the ACPI PCCT Table.
>
> +*/
>
> +STATIC CONST ACPI_PARSER PcctParser[] = {
>
> + PARSE_ACPI_HEADER (&AcpiHdrInfo),
>
> + {L"Flags", 4, 36, NULL, NULL, NULL, NULL, NULL},
>
> + {L"Reserved", 8, 40, NULL, NULL, NULL, NULL, NULL}
>
> +};
>
> +
>
> +/**
>
> + An ACPI_PARSER array describing the platform communications channel
> subspace
>
> + structure header.
>
> +*/
>
> +STATIC CONST ACPI_PARSER PccSubspaceHeaderParser[] = {
>
> + PCC_SUBSPACE_HEADER ()
>
> + // ... Type Specific Fields ...
>
> +};
>
> +
>
> +/**
>
> + An ACPI_PARSER array describing the Generic Communications Subspace -
> Type 0
>
> +*/
>
> +STATIC CONST ACPI_PARSER PccSubspaceType0Parser[] = {
>
> + PCC_SUBSPACE_HEADER (),
>
> + {L"Reserved", 6, 2, L"0x%x%x%x%x%x%x", Dump6Chars, NULL, NULL, NULL},
>
> + {L"Base Address", 8, 8, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Memory Range Length", 8, 16, L"0x%lx", NULL, NULL,
> ValidateRangeLength8, NULL},
>
> + {L"Doorbell Register", 12, 24, NULL, DumpGas, NULL, ValidatePccType0Gas,
> NULL},
>
> + {L"Doorbell Preserve", 8, 36, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Doorbell Write", 8, 44, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Nominal Latency", 4, 52, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Maximum Periodic Access Rate", 4, 56, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Minimum Request Turnaround Time", 2, 60, L"%u", NULL, NULL, NULL,
> NULL}
>
> +};
>
> +
>
> +/**
>
> + An ACPI_PARSER array describing the HW-Reduced Communications Subspace
>
> + - Type 1
>
> +*/
>
> +STATIC CONST ACPI_PARSER PccSubspaceType1Parser[] = {
>
> + PCC_SUBSPACE_HEADER (),
>
> + {L"Platform Interrupt", 4, 2, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Platform Interrupt Flags", 1, 6, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Reserved", 1, 7, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Base Address", 8, 8, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Memory Range Length", 8, 16, L"0x%lx", NULL, NULL,
> ValidateRangeLength8, NULL},
>
> + {L"Doorbell Register", 12, 24, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Doorbell Preserve", 8, 36, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Doorbell Write", 8, 44, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Nominal Latency", 4, 52, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Maximum Periodic Access Rate", 4, 56, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Minimum Request Turnaround Time", 2, 60, L"%u", NULL, NULL, NULL,
> NULL}
>
> +};
>
> +
>
> +/**
>
> + An ACPI_PARSER array describing the HW-Reduced Communications Subspace
>
> + - Type 2
>
> +*/
>
> +STATIC CONST ACPI_PARSER PccSubspaceType2Parser[] = {
>
> + PCC_SUBSPACE_HEADER (),
>
> + {L"Platform Interrupt", 4, 2, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Platform Interrupt Flags", 1, 6, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Reserved", 1, 7, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Base Address", 8, 8, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Memory Range Length", 8, 16, L"0x%lx", NULL, NULL,
> ValidateRangeLength8, NULL},
>
> + {L"Doorbell Register", 12, 24, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Doorbell Preserve", 8, 36, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Doorbell Write", 8, 44, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Nominal Latency", 4, 52, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Maximum Periodic Access Rate", 4, 56, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Minimum Request Turnaround Time", 2, 60, L"%u", NULL, NULL, NULL,
> NULL},
>
> + {L"Platform Interrupt Ack Register", 12, 62, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Platform Interrupt Ack Preserve", 8, 74, L"0x%lx", NULL, NULL, NULL,
> NULL},
>
> + {L"Platform Interrupt Ack Write", 8, 82, L"0x%lx", NULL, NULL,
>
> + NULL, NULL},
>
> +};
>
> +
>
> +/**
>
> + An ACPI_PARSER array describing the Extended PCC Subspaces - Type 3/4
>
> +*/
>
> +STATIC CONST ACPI_PARSER PccSubspaceType3Parser[] = {
>
> + PCC_SUBSPACE_HEADER (),
>
> + {L"Platform Interrupt", 4, 2, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Platform Interrupt Flags", 1, 6, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Reserved", 1, 7, L"0x%x", NULL, NULL, NULL, NULL},
>
> + {L"Base Address", 8, 8, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Memory Range Length", 4, 16, L"0x%x", NULL, NULL,
> ValidateRangeLength4, NULL},
>
> + {L"Doorbell Register", 12, 20, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Doorbell Preserve", 8, 32, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Doorbell Write", 8, 40, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Nominal Latency", 4, 48, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Maximum Periodic Access Rate", 4, 52, L"%u", NULL, NULL, NULL, NULL},
>
> + {L"Minimum Request Turnaround Time", 4, 56, L"%u", NULL, NULL, NULL,
> NULL},
>
> + {L"Platform Interrupt Ack Register", 12, 60, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Platform Interrupt Ack Preserve", 8, 72, L"0x%lx", NULL, NULL, NULL,
> NULL},
>
> + {L"Platform Interrupt Ack Set", 8, 80, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Reserved", 8, 88, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Cmd Complete Check Reg Addr", 12, 96, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Cmd Complete Check Mask", 8, 108, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Cmd Update Reg Addr", 12, 116, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Cmd Update Preserve mask", 8, 128, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Cmd Update Set mask", 8, 136, L"0x%lx", NULL, NULL, NULL, NULL},
>
> + {L"Error Status Register", 12, 144, NULL, DumpGas, NULL,
>
> + ValidatePccGas, NULL},
>
> + {L"Error Status Mask", 8, 156, L"0x%lx", NULL, NULL, NULL, NULL},
>
> +};
>
> +
>
> +/**
>
> + This function parses the PCC Subspace type 0.
>
> +
>
> + @param [in] Ptr Pointer to the start of Subspace Structure.
>
> + @param [in] Length Length of the Subspace Structure.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +DumpPccSubspaceType0 (
>
> + IN UINT8* Ptr,
>
> + IN UINT8 Length
>
> + )
>
> +{
>
> + ParseAcpi (
>
> + TRUE,
>
> + 2,
>
> + "Subspace Type 0",
>
> + Ptr,
>
> + Length,
>
> + PARSER_PARAMS (PccSubspaceType0Parser)
>
> + );
>
> +}
>
> +
>
> +/**
>
> + This function parses the PCC Subspace type 1.
>
> +
>
> + @param [in] Ptr Pointer to the start of the Subspace Structure.
>
> + @param [in] Length Length of the Subspace Structure.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +DumpPccSubspaceType1 (
>
> + IN UINT8* Ptr,
>
> + IN UINT8 Length
>
> + )
>
> +{
>
> + ParseAcpi (
>
> + TRUE,
>
> + 2,
>
> + "Subspace Type 1",
>
> + Ptr,
>
> + Length,
>
> + PARSER_PARAMS (PccSubspaceType1Parser)
>
> + );
>
> +}
>
> +
>
> +/**
>
> + This function parses the PCC Subspace type 2.
>
> +
>
> + @param [in] Ptr Pointer to the start of the Subspace Structure.
>
> + @param [in] Length Length of the Subspace Structure.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +DumpPccSubspaceType2 (
>
> + IN UINT8* Ptr,
>
> + IN UINT8 Length
>
> + )
>
> +{
>
> + ParseAcpi (
>
> + TRUE,
>
> + 2,
>
> + "Subspace Type 2",
>
> + Ptr,
>
> + Length,
>
> + PARSER_PARAMS (PccSubspaceType2Parser)
>
> + );
>
> +}
>
> +
>
> +/**
>
> + This function parses the PCC Subspace type 3.
>
> +
>
> + @param [in] Ptr Pointer to the start of the Subspace Structure.
>
> + @param [in] Length Length of the Subspace Structure.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +DumpPccSubspaceType3 (
>
> + IN UINT8* Ptr,
>
> + IN UINT8 Length
>
> + )
>
> +{
>
> + ParseAcpi (
>
> + TRUE,
>
> + 2,
>
> + "Subspace Type 3",
>
> + Ptr,
>
> + Length,
>
> + PARSER_PARAMS (PccSubspaceType3Parser)
>
> + );
>
> +}
>
> +
>
> +/**
>
> + This function parses the PCC Subspace type 4.
>
> +
>
> + @param [in] Ptr Pointer to the start of the Subspace Structure.
>
> + @param [in] Length Length of the Subspace Structure.
>
> +**/
>
> +STATIC
>
> +VOID
>
> +DumpPccSubspaceType4 (
>
> + IN UINT8* Ptr,
>
> + IN UINT8 Length
>
> + )
>
> +{
>
> + ParseAcpi (
>
> + TRUE,
>
> + 2,
>
> + "Subspace Type 4",
>
> + Ptr,
>
> + Length,
>
> + PARSER_PARAMS (PccSubspaceType3Parser)
>
> + );
>
> +}
>
> +
>
> +/**
>
> + This function parses the ACPI PCCT table including its sub-structures of
> type
>
> + 0 through 4.
>
> + When trace is enabled this function parses the PCCT table and
>
> + traces the ACPI table fields.
>
> +
>
> + This function also performs validation of the ACPI table fields.
>
> +
>
> + @param [in] Trace If TRUE, trace the ACPI fields.
>
> + @param [in] Ptr Pointer to the start of the buffer.
>
> + @param [in] AcpiTableLength Length of the ACPI table.
>
> + @param [in] AcpiTableRevision Revision of the ACPI table.
>
> +**/
>
> +VOID
>
> +EFIAPI
>
> +ParseAcpiPcct (
>
> + IN BOOLEAN Trace,
>
> + IN UINT8* Ptr,
>
> + IN UINT32 AcpiTableLength,
>
> + IN UINT8 AcpiTableRevision
>
> + )
>
> +{
>
> + UINT32 Offset;
>
> + UINT8* PccSubspacePtr;
>
> + UINT32 SubspaceCount;
>
> +
>
> + if (!Trace) {
>
> + return;
>
> + }
>
> +
>
> + Offset = ParseAcpi (
>
> + TRUE,
>
> + 0,
>
> + "PCCT",
>
> + Ptr,
>
> + AcpiTableLength,
>
> + PARSER_PARAMS (PcctParser)
>
> + );
>
> +
>
> + PccSubspacePtr = Ptr + Offset;
>
> +
>
> + SubspaceCount = 0;
>
> + while (Offset < AcpiTableLength) {
>
> + // Parse common structure header to obtain Type and Length.
>
> + ParseAcpi (
>
> + FALSE,
>
> + 0,
>
> + NULL,
>
> + PccSubspacePtr,
>
> + AcpiTableLength - Offset,
>
> + PARSER_PARAMS (PccSubspaceHeaderParser)
>
> + );
>
> +
>
> + // Check if the values used to control the parsing logic have been
>
> + // successfully read.
>
> + if ((PccSubspaceType == NULL) ||
>
> + (PccSubspaceLength == NULL)) {
>
> + IncrementErrorCount ();
>
> + Print (
>
> + L"ERROR: Insufficient remaining table buffer length to read the " \
>
> + L"structure header. Length = %u.\n",
>
> + AcpiTableLength - Offset
>
> + );
>
> + return;
>
> + }
>
> +
>
> + // Validate Structure length
>
> + if ((*PccSubspaceLength == 0) ||
>
> + ((Offset + (*PccSubspaceLength)) > AcpiTableLength)) {
>
> + IncrementErrorCount ();
>
> + Print (
>
> + L"ERROR: Invalid Structure length. " \
>
> + L"Length = %u. Offset = %u. AcpiTableLength = %u.\n",
>
> + *PccSubspaceLength,
>
> + Offset,
>
> + AcpiTableLength
>
> + );
>
> + return;
>
> + }
>
> +
>
> + switch (*PccSubspaceType) {
>
> + case EFI_ACPI_6_3_PCCT_SUBSPACE_TYPE_GENERIC:
>
> + DumpPccSubspaceType0 (
>
> + PccSubspacePtr,
>
> + *PccSubspaceLength
>
> + );
>
> + break;
>
> + case
> EFI_ACPI_6_3_PCCT_SUBSPACE_TYPE_1_HW_REDUCED_COMMUNICATIONS:
>
> + DumpPccSubspaceType1 (
>
> + PccSubspacePtr,
>
> + *PccSubspaceLength
>
> + );
>
> + break;
>
> + case
> EFI_ACPI_6_3_PCCT_SUBSPACE_TYPE_2_HW_REDUCED_COMMUNICATIONS:
>
> + DumpPccSubspaceType2 (
>
> + PccSubspacePtr,
>
> + *PccSubspaceLength
>
> + );
>
> + break;
>
> + case EFI_ACPI_6_3_PCCT_SUBSPACE_TYPE_3_EXTENDED_PCC:
>
> + DumpPccSubspaceType3 (
>
> + PccSubspacePtr,
>
> + *PccSubspaceLength
>
> + );
>
> + break;
>
> + case EFI_ACPI_6_3_PCCT_SUBSPACE_TYPE_4_EXTENDED_PCC:
>
> + DumpPccSubspaceType4 (
>
> + PccSubspacePtr,
>
> + *PccSubspaceLength
>
> + );
>
> + break;
>
> + default:
>
> + IncrementErrorCount ();
>
> + Print (
>
> + L"ERROR: Unknown processor topology structure:"
>
> + L" Type = %u, Length = %u\n",
>
> + PccSubspaceType,
>
> + *PccSubspaceLength
>
> + );
>
> + }
>
> +
>
> + PccSubspacePtr += *PccSubspaceLength;
>
> + Offset += *PccSubspaceLength;
>
> + SubspaceCount++;
>
> + } // while
>
> + if (SubspaceCount > MAX_PCC_SUBSPACES) {
>
> + IncrementErrorCount ();
>
> + Print (L"ERROR: Too many subspaces.");
>
> + }
>
> +}
>
> diff --git
> a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.h
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.h
>
> new file mode 100644
>
> index
> 0000000000000000000000000000000000000000..5260c22040ba87d3984eade7
> d8a8765ba03917e6
>
> --- /dev/null
>
> +++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Pcct/PcctParser.h
>
> @@ -0,0 +1,33 @@
>
> +/** @file
>
> + Header file for PCCT parser
>
> +
>
> + Copyright (c) 2020, Arm Limited.
>
> + SPDX-License-Identifier: BSD-2-Clause-Patent
>
> +**/
>
> +
>
> +#ifndef PCCT_PARSER_H_
>
> +#define PCCT_PARSER_H_
>
> +
>
> +/**
>
> + Minimum value for the 'length' field in subspaces of types 0, 1 and 2.
>
> +*/
>
> +#define MIN_MEMORY_RANGE_LENGTH 8
>
> +
>
> +/**
>
> + Minimum value for the 'length' field in subspaces of types 3 and 4.
>
> +*/
>
> +#define MIN_EXT_PCC_SUBSPACE_MEM_RANGE_LEN 16
>
> +
>
> +/**
>
> + Maximum number of PCC subspaces.
>
> +*/
>
> +#define MAX_PCC_SUBSPACES 256
>
> +
>
> +/**
>
> + Parser for the header of any type of PCC subspace.
>
> +*/
>
> +#define PCC_SUBSPACE_HEADER()
> \
>
> + {L"Type", 1, 0, L"0x%x", NULL, (VOID**)&PccSubspaceType, NULL, NULL},
> \
>
> + {L"Length", 1, 1, L"%u", NULL, (VOID**)&PccSubspaceLength, NULL, NULL}
>
> +
>
> +#endif // PCCT_PARSER_H_
>
> diff --git
> a/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.c
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.c
>
> index
> d2f26ff89f12e596702281c38ab0de3729aa68e4..feb80661cddc420670edb2d8c7a
> 570b0a89272d8 100644
>
> ---
> a/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.c
>
> +++
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.c
>
> @@ -1,7 +1,7 @@
>
> /** @file
>
> Main file for 'acpiview' Shell command function.
>
>
>
> - Copyright (c) 2016 - 2020, ARM Limited. All rights reserved.<BR>
>
> + Copyright (c) 2016 - 2020, Arm Limited. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> **/
>
>
>
> @@ -57,6 +57,8 @@ ACPI_TABLE_PARSER ParserList[] = {
>
> {EFI_ACPI_6_2_MULTIPLE_APIC_DESCRIPTION_TABLE_SIGNATURE,
> ParseAcpiMadt},
>
>
> {EFI_ACPI_6_2_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BA
> SE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE,
>
> ParseAcpiMcfg},
>
> +
> {EFI_ACPI_6_2_PLATFORM_COMMUNICATIONS_CHANNEL_TABLE_SIGNATURE,
>
> + ParseAcpiPcct},
>
>
> {EFI_ACPI_6_2_PROCESSOR_PROPERTIES_TOPOLOGY_TABLE_STRUCTURE_SIGN
> ATURE,
>
> ParseAcpiPptt},
>
> {RSDP_TABLE_INFO, ParseAcpiRsdp},
>
> diff --git
> a/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.inf
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.inf
>
> index
> 91459f9ec632635ee453c5ef46f67445cd9eee0c..efa9c8784a6670e5a4f500e0ae5
> 59a4938852f95 100644
>
> ---
> a/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.inf
>
> +++
> b/ShellPkg/Library/UefiShellAcpiViewCommandLib/UefiShellAcpiViewCommandLi
> b.inf
>
> @@ -1,7 +1,7 @@
>
> ## @file
>
> # Provides Shell 'acpiview' command functions
>
> #
>
> -# Copyright (c) 2016 - 2020, ARM Limited. All rights reserved.<BR>
>
> +# Copyright (c) 2016 - 2020, Arm Limited. All rights reserved.<BR>
>
> #
>
> # SPDX-License-Identifier: BSD-2-Clause-Patent
>
> #
>
> @@ -37,6 +37,8 @@
>
> Parsers/Madt/MadtParser.c
>
> Parsers/Madt/MadtParser.h
>
> Parsers/Mcfg/McfgParser.c
>
> + Parsers/Pcct/PcctParser.c
>
> + Parsers/Pcct/PcctParser.h
>
> Parsers/Pptt/PpttParser.c
>
> Parsers/Pptt/PpttParser.h
>
> Parsers/Rsdp/RsdpParser.c
>
> --
>
> 'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
>
>
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