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b38180effe
This checks the number of PCC descriptor entries provided match the count set in the table, and if they don't indicate a warning. Signed-off-by: Carsten Haitzler <carsten.haitzler@foss.arm.com>
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/** @file
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RAS2 table parser
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Copyright (c) 2024, Arm Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Reference(s):
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- ACPI 6.5 Specification - August 2022
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**/
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#include <Library/PrintLib.h>
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#include <Library/BaseLib.h>
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#include <Library/UefiLib.h>
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#include "AcpiParser.h"
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#include "AcpiView.h"
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// Local variables
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STATIC CONST UINT16 *Ras2PccDescriptors;
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STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
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/**
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An ACPI_PARSER array describing the ACPI RAS2 Table.
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*/
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STATIC CONST ACPI_PARSER Ras2Parser[] = {
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PARSE_ACPI_HEADER (&AcpiHdrInfo),
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{ L"Reserved", 2, 36, L"0x%x", NULL, NULL, NULL, NULL },
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{ L"PCC Descriptors", 2, 38, L"%d", NULL, (VOID **)&Ras2PccDescriptors, NULL, NULL }
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};
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/**
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An ACPI_PARSER array describing the RAS2 PCC ID Entry
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*/
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STATIC CONST ACPI_PARSER Ras2StructurePccDescriptor[] = {
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{ L"PCC ID", 1, 0, L"0x%x", NULL, NULL, NULL, NULL },
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{ L"Reserved", 1, 1, L"0x%x", NULL, NULL, NULL, NULL },
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{ L"Reserved", 1, 2, L"0x%x", NULL, NULL, NULL, NULL },
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{ L"Feature Type", 1, 3, L"0x%x", NULL, NULL, NULL, NULL },
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{ L"Instance", 4, 4, L"0x%x", NULL, NULL, NULL, NULL }
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};
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STATIC
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VOID
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DumpPccEntry (
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IN UINT8 *Ptr,
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IN UINT32 Length
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)
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{
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ParseAcpi (
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TRUE,
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2,
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"PCC Descriptor Entry",
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Ptr,
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Length,
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PARSER_PARAMS (Ras2StructurePccDescriptor)
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);
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}
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/**
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This function parses the ACPI RAS2 table.
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When trace is enabled this function parses the RAS2 table and
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traces the ACPI table fields.
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This function parses the following RAS2 structures:
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- Pcc Instries
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- Entry Pcc ID
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- Entry Feature Type
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- Entry Pcc Instance
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This function also performs validation of the ACPI table fields.
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@param [in] Trace If TRUE, trace the ACPI fields.
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@param [in] Ptr Pointer to the start of the buffer.
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@param [in] AcpiTableLength Length of the ACPI table.
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@param [in] AcpiTableRevision Revision of the ACPI table.
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**/
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VOID
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EFIAPI
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ParseAcpiRas2 (
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IN BOOLEAN Trace,
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IN UINT8 *Ptr,
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IN UINT32 AcpiTableLength,
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IN UINT8 AcpiTableRevision
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)
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{
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UINT32 Offset;
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UINT16 Count = 0;
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CONST CHAR16 *Message;
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if (!Trace) {
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return;
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}
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// Parse ACPI Header + RAS2 "fixed" fields
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Offset = ParseAcpi (
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Trace,
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0,
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"RAS2",
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Ptr,
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AcpiTableLength,
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PARSER_PARAMS (Ras2Parser)
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);
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// Table is too small to contain data
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if (Offset >= AcpiTableLength) {
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return;
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}
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// Loop over rest of table for PCC Entries and dump them
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while (Offset <= (AcpiTableLength - sizeof (EFI_ACPI_RAS2_PCC_DESCRIPTOR))) {
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DumpPccEntry (
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Ptr + Offset,
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sizeof (EFI_ACPI_RAS2_PCC_DESCRIPTOR)
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);
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Offset += sizeof (EFI_ACPI_RAS2_PCC_DESCRIPTOR);
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Count++;
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} // while
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// Check counts match and print error if not
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if (Count != *Ras2PccDescriptors) {
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Message = Count > *Ras2PccDescriptors ? L"many" : L"few";
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IncrementWarningCount ();
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Print (
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L"\nWARNING: Too %s descriptors provided (advertised %d, provided %d)",
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Message,
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*Ras2PccDescriptors,
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Count
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);
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}
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}
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