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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/** @file
Arm Gic Redistributor Parser.
Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
**/
#include "CmObjectDescUtility.h"
#include "FdtHwInfoParser.h"
#include "Arm/Gic/ArmGicDispatcher.h"
#include "Arm/Gic/ArmGicRParser.h"
/** Parse a Gic compatible interrupt-controller node,
extracting GicR information.
This parser is valid for Gic v3 and higher.
@param [in] FdtParserHandle A handle to the parser instance.
@param [in] GicIntcNode Offset of a Gic compatible
interrupt-controller node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ABORTED An error occurred.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
STATIC
EFI_STATUS
EFIAPI
GicRIntcNodeParser (
IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
IN INT32 GicIntcNode
)
{
EFI_STATUS Status;
UINT32 Index;
UINT32 RedistReg;
UINT32 RegSize;
INT32 AddressCells;
INT32 SizeCells;
CONST UINT8 *Data;
INT32 DataSize;
CM_ARM_GIC_REDIST_INFO GicRInfo;
VOID *Fdt;
if (FdtParserHandle == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Fdt = FdtParserHandle->Fdt;
Status = FdtGetParentAddressInfo (
Fdt,
GicIntcNode,
&AddressCells,
&SizeCells
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Don't support more than 64 bits and less than 32 bits addresses.
if ((AddressCells < 1) ||
(AddressCells > 2) ||
(SizeCells < 1) ||
(SizeCells > 2))
{
ASSERT (0);
return EFI_ABORTED;
}
// The "#redistributor-regions" property is optional.
// It indicates the number of GicR.
Data = fdt_getprop (Fdt, GicIntcNode, "#redistributor-regions", &DataSize);
if ((Data != NULL) && (DataSize == sizeof (UINT32))) {
// If available, must be on one cell.
RedistReg = fdt32_to_cpu (*(UINT32 *)Data);
} else {
// The DT Spec says GicR is mandatory so we will
// always have one.
RedistReg = 1;
}
/*
Ref: linux/blob/master/Documentation/devicetree/bindings/
interrupt-controller/arm%2Cgic-v3.yaml
reg:
description: |
Specifies base physical address(s) and size of the GIC
registers, in the following order:
- GIC Distributor interface (GICD)
- GIC Redistributors (GICR), one range per redistributor region
- GIC CPU interface (GICC)
- GIC Hypervisor interface (GICH)
- GIC Virtual CPU interface (GICV)
GICC, GICH and GICV are optional.
minItems: 2
maxItems: 4096
Example:
interrupt-controller@2c010000 {
compatible = "arm,gic-v3";
#interrupt-cells = <4>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
interrupt-controller;
redistributor-stride = <0x0 0x40000>; // 256kB stride
#redistributor-regions = <2>;
reg = <0x2c010000 0x10000>, // GICD
<0x2d000000 0x800000>, // GICR 1: CPUs 0-31
<0x2e000000 0x800000>, // GICR 2: CPUs 32-63
<0x2c040000 0x2000>, // GICC
<0x2c060000 0x2000>, // GICH
<0x2c080000 0x2000>; // GICV
interrupts = <1 9 4>;
...
}
*/
RegSize = (AddressCells + SizeCells) * sizeof (UINT32);
Data = fdt_getprop (Fdt, GicIntcNode, "reg", &DataSize);
if ((Data == NULL) ||
(DataSize < 0) ||
((DataSize % RegSize) != 0))
{
// If error or wrong size.
ASSERT (0);
return EFI_ABORTED;
}
Data += GET_DT_REG_ADDRESS_OFFSET (1, AddressCells, SizeCells)
* sizeof (UINT32);
for (Index = 0; Index < RedistReg; Index++) {
ZeroMem (&GicRInfo, sizeof (CM_ARM_GIC_REDIST_INFO));
if (AddressCells == 2) {
GicRInfo.DiscoveryRangeBaseAddress = fdt64_to_cpu (*(UINT64 *)Data);
} else {
GicRInfo.DiscoveryRangeBaseAddress = fdt32_to_cpu (*(UINT32 *)Data);
}
Data += sizeof (UINT32) * AddressCells;
if (SizeCells == 2) {
GicRInfo.DiscoveryRangeLength = (UINT32)fdt64_to_cpu (*(UINT64 *)Data);
} else {
GicRInfo.DiscoveryRangeLength = fdt32_to_cpu (*(UINT32 *)Data);
}
// Add the CmObj to the Configuration Manager.
Status = AddSingleCmObj (
FdtParserHandle,
CREATE_CM_ARM_OBJECT_ID (EArmObjGicRedistributorInfo),
&GicRInfo,
sizeof (CM_ARM_GIC_REDIST_INFO),
NULL
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Data += sizeof (UINT32) * SizeCells;
} // for
return Status;
}
/** CM_ARM_GIC_REDIST_INFO parser function.
This parser expects FdtBranch to be a Gic interrupt-controller node.
Gic version must be v3 or higher.
typedef struct CmArmGicRedistInfo {
UINT64 DiscoveryRangeBaseAddress; // {Populated}
UINT32 DiscoveryRangeLength; // {Populated}
} CM_ARM_GIC_REDIST_INFO;
A parser parses a Device Tree to populate a specific CmObj type. None,
one or many CmObj can be created by the parser.
The created CmObj are then handed to the parser's caller through the
HW_INFO_ADD_OBJECT interface.
This can also be a dispatcher. I.e. a function that not parsing a
Device Tree but calling other parsers.
@param [in] FdtParserHandle A handle to the parser instance.
@param [in] FdtBranch When searching for DT node name, restrict
the search to this Device Tree branch.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ABORTED An error occurred.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_NOT_FOUND Not found.
@retval EFI_UNSUPPORTED Unsupported.
**/
EFI_STATUS
EFIAPI
ArmGicRInfoParser (
IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
IN INT32 FdtBranch
)
{
EFI_STATUS Status;
UINT32 GicVersion;
VOID *Fdt;
if (FdtParserHandle == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Fdt = FdtParserHandle->Fdt;
if (!FdtNodeHasProperty (Fdt, FdtBranch, "interrupt-controller")) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Get the Gic version of the interrupt-controller.
Status = GetGicVersion (Fdt, FdtBranch, &GicVersion);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
if (GicVersion < 3) {
ASSERT (0);
return EFI_UNSUPPORTED;
}
Status = GicRIntcNodeParser (FdtParserHandle, FdtBranch);
ASSERT_EFI_ERROR (Status);
return Status;
}
|
