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e0cf5ac693
List ParseAcpi() function arguments one per line in order to make this function call consistent with ParseAcpi() calls in other ACPI table parsers. Also, notify the user that XsdtAddress value of 0 results in RSDP parsing being terminated and that the XSDT table will not be processed. This effectively means that no more ACPI tables will be parsed because of this RSDP table content error. Signed-off-by: Krzysztof Koch <krzysztof.koch@arm.com> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com> Reviewed-by: Jaben Carsey <jaben.carsey@intel.com> Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>
153 lines
4.3 KiB
C
153 lines
4.3 KiB
C
/** @file
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RSDP table parser
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Copyright (c) 2016 - 2019, 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 6.2 Specification - Errata A, September 2017
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**/
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#include <Library/UefiLib.h>
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#include "AcpiParser.h"
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#include "AcpiTableParser.h"
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// Local Variables
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STATIC CONST UINT64* XsdtAddress;
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/**
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This function validates the RSDT Address.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateRsdtAddress (
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IN UINT8* Ptr,
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IN VOID* Context
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)
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{
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#if defined(MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
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// Reference: Server Base Boot Requirements System Software on ARM Platforms
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// Section: 4.2.1.1 RSDP
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// Root System Description Pointer (RSDP), ACPI ? 5.2.5.
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// - Within the RSDP, the RsdtAddress field must be null (zero) and the
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// XsdtAddresss MUST be a valid, non-null, 64-bit value.
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UINT32 RsdtAddr;
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RsdtAddr = *(UINT32*)Ptr;
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if (RsdtAddr != 0) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: Rsdt Address = 0x%p. This must be NULL on ARM Platforms.",
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RsdtAddr
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);
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}
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#endif
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}
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/**
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This function validates the XSDT Address.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateXsdtAddress (
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IN UINT8* Ptr,
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IN VOID* Context
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)
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{
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#if defined(MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
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// Reference: Server Base Boot Requirements System Software on ARM Platforms
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// Section: 4.2.1.1 RSDP
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// Root System Description Pointer (RSDP), ACPI ? 5.2.5.
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// - Within the RSDP, the RsdtAddress field must be null (zero) and the
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// XsdtAddresss MUST be a valid, non-null, 64-bit value.
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UINT64 XsdtAddr;
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XsdtAddr = *(UINT64*)Ptr;
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if (XsdtAddr == 0) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: Xsdt Address = 0x%p. This must not be NULL on ARM Platforms.",
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XsdtAddr
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);
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}
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#endif
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}
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/**
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An array describing the ACPI RSDP Table.
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**/
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STATIC CONST ACPI_PARSER RsdpParser[] = {
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{L"Signature", 8, 0, NULL, Dump8Chars, NULL, NULL, NULL},
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{L"Checksum", 1, 8, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Oem ID", 6, 9, NULL, Dump6Chars, NULL, NULL, NULL},
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{L"Revision", 1, 15, L"%d", NULL, NULL, NULL, NULL},
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{L"RSDT Address", 4, 16, L"0x%x", NULL, NULL, ValidateRsdtAddress, NULL},
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{L"Length", 4, 20, L"%d", NULL, NULL, NULL, NULL},
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{L"XSDT Address", 8, 24, L"0x%lx", NULL, (VOID**)&XsdtAddress,
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ValidateXsdtAddress, NULL},
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{L"Extended Checksum", 1, 32, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Reserved", 3, 33, L"%x %x %x", Dump3Chars, NULL, NULL, NULL}
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};
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/**
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This function parses the ACPI RSDP table.
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This function invokes the parser for the XSDT table.
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* Note - This function does not support parsing of RSDT table.
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This function also performs a RAW dump of the ACPI table and
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validates the checksum.
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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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ParseAcpiRsdp (
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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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if (Trace) {
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DumpRaw (Ptr, AcpiTableLength);
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VerifyChecksum (TRUE, Ptr, AcpiTableLength);
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}
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ParseAcpi (
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Trace,
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0,
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"RSDP",
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Ptr,
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AcpiTableLength,
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PARSER_PARAMS (RsdpParser)
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);
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// This code currently supports parsing of XSDT table only
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// and does not parse the RSDT table. Platforms provide the
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// RSDT to enable compatibility with ACPI 1.0 operating systems.
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// Therefore the RSDT should not be used on ARM platforms.
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if ((*XsdtAddress) == 0) {
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IncrementErrorCount ();
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Print (L"ERROR: XSDT Pointer is not set. RSDP parsing aborted.\n");
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return;
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}
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ProcessAcpiTable ((UINT8*)(UINTN)(*XsdtAddress));
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}
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