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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/** @file
SLIT table parser
Copyright (c) 2016 - 2019, 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/PrintLib.h>
#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
// Local Variables
STATIC CONST UINT64* SlitSystemLocalityCount;
STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
/**
An ACPI_PARSER array describing the ACPI SLIT table.
**/
STATIC CONST ACPI_PARSER SlitParser[] = {
PARSE_ACPI_HEADER (&AcpiHdrInfo),
{L"Number of System Localities", 8, 36, L"0x%lx", NULL,
(VOID**)&SlitSystemLocalityCount, NULL, NULL}
};
/**
Macro to get the value of a System Locality
**/
#define SLIT_ELEMENT(Ptr, i, j) *(Ptr + (i * LocalityCount) + j)
/**
This function parses the ACPI SLIT table.
When trace is enabled this function parses the SLIT table and
traces the ACPI table fields.
This function also validates System Localities for the following:
- Diagonal elements have a normalized value of 10
- Relative distance from System Locality at i*N+j is same as
j*N+i
@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
ParseAcpiSlit (
IN BOOLEAN Trace,
IN UINT8* Ptr,
IN UINT32 AcpiTableLength,
IN UINT8 AcpiTableRevision
)
{
UINT32 Offset;
UINT32 Count;
UINT32 Index;
UINT32 LocalityCount;
UINT8* LocalityPtr;
CHAR16 Buffer[80]; // Used for AsciiName param of ParseAcpi
if (!Trace) {
return;
}
Offset = ParseAcpi (
TRUE,
0,
"SLIT",
Ptr,
AcpiTableLength,
PARSER_PARAMS (SlitParser)
);
// Check if the values used to control the parsing logic have been
// successfully read.
if (SlitSystemLocalityCount == NULL) {
IncrementErrorCount ();
Print (
L"ERROR: Insufficient table length. AcpiTableLength = %d.\n",
AcpiTableLength
);
return;
}
/*
Despite the 'Number of System Localities' being a 64-bit field in SLIT,
the maximum number of localities that can be represented in SLIT is limited
by the 'Length' field of the ACPI table.
Since the ACPI table length field is 32-bit wide. The maximum number of
localities that can be represented in SLIT can be calculated as:
MaxLocality = sqrt (MAX_UINT32 - sizeof (EFI_ACPI_6_3_SYSTEM_LOCALITY_DISTANCE_INFORMATION_TABLE_HEADER))
= 65535
= MAX_UINT16
*/
if (*SlitSystemLocalityCount > MAX_UINT16) {
IncrementErrorCount ();
Print (
L"ERROR: The Number of System Localities provided can't be represented " \
L"in the SLIT table. SlitSystemLocalityCount = %ld. " \
L"MaxLocalityCountAllowed = %d.\n",
*SlitSystemLocalityCount,
MAX_UINT16
);
return;
}
LocalityCount = (UINT32)*SlitSystemLocalityCount;
// Make sure system localities fit in the table buffer provided
if (Offset + (LocalityCount * LocalityCount) > AcpiTableLength) {
IncrementErrorCount ();
Print (
L"ERROR: Invalid Number of System Localities. " \
L"SlitSystemLocalityCount = %ld. AcpiTableLength = %d.\n",
*SlitSystemLocalityCount,
AcpiTableLength
);
return;
}
LocalityPtr = Ptr + Offset;
// We only print the Localities if the count is less than 16
// If the locality count is more than 16 then refer to the
// raw data dump.
if (LocalityCount < 16) {
UnicodeSPrint (
Buffer,
sizeof (Buffer),
L"Entry[0x%lx][0x%lx]",
LocalityCount,
LocalityCount
);
PrintFieldName (0, Buffer);
Print (L"\n");
Print (L" ");
for (Index = 0; Index < LocalityCount; Index++) {
Print (L" (%3d) ", Index);
}
Print (L"\n");
for (Count = 0; Count< LocalityCount; Count++) {
Print (L" (%3d) ", Count);
for (Index = 0; Index < LocalityCount; Index++) {
Print (L" %3d ", SLIT_ELEMENT (LocalityPtr, Count, Index));
}
Print (L"\n");
}
}
// Validate
for (Count = 0; Count < LocalityCount; Count++) {
for (Index = 0; Index < LocalityCount; Index++) {
// Element[x][x] must be equal to 10
if ((Count == Index) && (SLIT_ELEMENT (LocalityPtr, Count,Index) != 10)) {
IncrementErrorCount ();
Print (
L"ERROR: Diagonal Element[0x%lx][0x%lx] (%3d)."
L" Normalized Value is not 10\n",
Count,
Index,
SLIT_ELEMENT (LocalityPtr, Count, Index)
);
}
// Element[i][j] must be equal to Element[j][i]
if (SLIT_ELEMENT (LocalityPtr, Count, Index) !=
SLIT_ELEMENT (LocalityPtr, Index, Count)) {
IncrementErrorCount ();
Print (
L"ERROR: Relative distances for Element[0x%lx][0x%lx] (%3d) and \n"
L"Element[0x%lx][0x%lx] (%3d) do not match.\n",
Count,
Index,
SLIT_ELEMENT (LocalityPtr, Count, Index),
Index,
Count,
SLIT_ELEMENT (LocalityPtr, Index, Count)
);
}
}
}
}
|
