RsdpParser.c File Reference

#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"

Go to the source code of this file.

Functions
STATIC VOID EFIAPI	ValidateRsdtAddress (IN UINT8 *Ptr, IN UINT32 Length, IN VOID *Context)
STATIC VOID EFIAPI	ValidateXsdtAddress (IN UINT8 *Ptr, IN UINT32 Length, IN VOID *Context)
VOID EFIAPI	ParseAcpiRsdp (IN BOOLEAN Trace, IN UINT8 *Ptr, IN UINT32 AcpiTableLength, IN UINT8 AcpiTableRevision)

Variables
STATIC CONST UINT64 *	XsdtAddress
STATIC CONST ACPI_PARSER	RsdpParser []

Detailed Description

RSDP table parser

Copyright (c) 2016 - 2024, Arm Limited. All rights reserved. SPDX-License-Identifier: BSD-2-Clause-Patent

Reference(s):

• ACPI 6.2 Specification - Errata A, September 2017

Definition in file RsdpParser.c.

Function Documentation

ParseAcpiRsdp()

VOID EFIAPI ParseAcpiRsdp	(	IN BOOLEAN	Trace,
		IN UINT8 *	Ptr,
		IN UINT32	AcpiTableLength,
		IN UINT8	AcpiTableRevision
	)

This function parses the ACPI RSDP table.

This function invokes the parser for the XSDT table. Note - This function does not support parsing of RSDT table.

This function also performs a RAW dump of the ACPI table and validates the checksum.

Parameters

[in]	Trace	If TRUE, trace the ACPI fields.
[in]	Ptr	Pointer to the start of the buffer.
[in]	AcpiTableLength	Length of the ACPI table.
[in]	AcpiTableRevision	Revision of the ACPI table.

Definition at line 126 of file RsdpParser.c.

ValidateRsdtAddress()

STATIC VOID EFIAPI ValidateRsdtAddress	(	IN UINT8 *	Ptr,
		IN UINT32	Length,
		IN VOID *	Context
	)

This function validates the RSDT Address.

Parameters

[in]	Ptr	Pointer to the start of the field data.
[in]	Length	Length of the field.
[in]	Context	Pointer to context specific information e.g. this could be a pointer to the ACPI table header.

Definition at line 29 of file RsdpParser.c.

ValidateXsdtAddress()

STATIC VOID EFIAPI ValidateXsdtAddress	(	IN UINT8 *	Ptr,
		IN UINT32	Length,
		IN VOID *	Context
	)

This function validates the XSDT Address.

Parameters

[in]	Ptr	Pointer to the start of the field data.
[in]	Length	Length of the field.
[in]	Context	Pointer to context specific information e.g. this could be a pointer to the ACPI table header.

Definition at line 67 of file RsdpParser.c.

Variable Documentation

RsdpParser

STATIC CONST ACPI_PARSER RsdpParser[]

Initial value:

= {
  { L"Signature",         8, 0,  NULL,        Dump8Chars, NULL,                  NULL,                NULL },
  { L"Checksum",          1, 8,  L"0x%x",     NULL,       NULL,                  NULL,                NULL },
  { L"Oem ID",            6, 9,  NULL,        Dump6Chars, NULL,                  NULL,                NULL },
  { L"Revision",          1, 15, L"%d",       NULL,       NULL,                  NULL,                NULL },
  { L"RSDT Address",      4, 16, L"0x%x",     NULL,       NULL,                  ValidateRsdtAddress, NULL },
  { L"Length",            4, 20, L"%d",       NULL,       NULL,                  NULL,                NULL },
  { L"XSDT Address",      8, 24, L"0x%lx",    NULL,       (VOID **)&XsdtAddress,
    ValidateXsdtAddress, NULL },
  { L"Extended Checksum", 1, 32, L"0x%x",     NULL,       NULL,                  NULL,                NULL },
  { L"Reserved",          3, 33, L"%x %x %x", Dump3Chars, NULL,                  NULL,                NULL }
}

An array describing the ACPI RSDP Table.

Definition at line 97 of file RsdpParser.c.

XsdtAddress

STATIC CONST UINT64* XsdtAddress

Definition at line 16 of file RsdpParser.c.