blob: 7f30a8409bb711d4edf77ed04319c628ef8aea73 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/** @file
DSDT table parser
Copyright (c) 2016 - 2022, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- ACPI 6.2 Specification - Errata A, September 2017
**/
#include <IndustryStandard/Acpi.h>
#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
/**
This function parses the ACPI DSDT table.
When trace is enabled this function parses the DSDT table and
traces the ACPI table fields.
For the DSDT table only the ACPI header fields are parsed and
traced.
@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
ParseAcpiDsdt (
IN BOOLEAN Trace,
IN UINT8 *Ptr,
IN UINT32 AcpiTableLength,
IN UINT8 AcpiTableRevision
)
{
if (!Trace) {
return;
}
DumpAcpiHeader (Ptr);
// As per 19.6.29 in the version 6.4 of the ACPI spec, a revision less than 2
// restricts integers to 32 bit width. This may not be intended, raise a
// warning
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_ARM)
if (AcpiTableRevision < 2) {
IncrementWarningCount ();
Print (
L"WARNING: DSDT Table Revision less than 2. Integer width restricted to "
L"32 bits. Table Revision = %d.\n",
AcpiTableRevision
);
return;
}
#endif
}
|
