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| author | Pierre Gondois <Pierre.Gondois@arm.com> | 2022-02-01 16:30:13 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2022-02-01 17:39:34 +0000 |
| commit | 5751d608217d0e8250442efb5941733407b8d0c5 (patch) | |
| tree | e8a7e216ca95d86d461e479c48571cf61506d467 /DynamicTablesPkg | |
| parent | 13136cc3111f2b2e44e2f1ba80e08434b79b1f4b (diff) | |
| download | edk2-5751d608217d0e8250442efb5941733407b8d0c5.tar.gz edk2-5751d608217d0e8250442efb5941733407b8d0c5.tar.bz2 edk2-5751d608217d0e8250442efb5941733407b8d0c5.zip | |
DynamicTablesPkg: AmlLib: AmlAddPrtEntry() to handle GSI
In ACPI 6.4, s6.2.13, _PRT objects describing PCI legacy interrupts
can be defined following 2 models.
In the first model, _PRT entries reference link devices. Link devices
then describe interrupts. This allows to dynamically modify
interrupts through _SRS and _PRS objects and to choose exactly the
interrupt type (level/edge triggered, active high/low).
In the second model, interrupt numbers are described in the _PRT entry.
The interrupt type is then assumed by the OS.
AmlAddPrtEntry() currently only handles the first model. Make
changes to also handle the second model.
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'DynamicTablesPkg')
| -rw-r--r-- | DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c | 89 |
1 files changed, 55 insertions, 34 deletions
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c index d245848ce3..2d55db97c7 100644 --- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c +++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c @@ -1,7 +1,7 @@ /** @file
AML Code Generation.
- Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+ Copyright (c) 2020 - 2022, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -881,6 +881,9 @@ AmlCodeGenNameResourceTemplate ( // interrupt, so let it to index 0.
}
+ The 2 models described in ACPI 6.4, s6.2.13 "_PRT (PCI Routing Table)" can
+ be generated by this function. The example above matches the first model.
+
The package is added at the tail of the list of the input _PRT node
name:
Name (_PRT, Package () {
@@ -901,8 +904,10 @@ AmlCodeGenNameResourceTemplate ( @param [in] Pin PCI pin number of the device (0-INTA ... 3-INTD).
Must be between 0-3.
@param [in] LinkName Link Name, i.e. device in the AML NameSpace
- describing the interrupt used.
- The input string is copied.
+ describing the interrupt used. The input string
+ is copied.
+ If NULL, generate 0 in the 'Source' field (cf.
+ second model, using GSIV).
@param [in] SourceIndex Source index or GSIV.
@param [in] PrtNameNode Prt Named node to add the object to ....
@@ -930,7 +935,6 @@ AmlAddPrtEntry ( AML_DATA_NODE *DataNode;
if ((Pin > 3) ||
- (LinkName == NULL) ||
(PrtNameNode == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)PrtNameNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (PrtNameNode, AML_NAME_OP, 0)) ||
@@ -999,41 +1003,58 @@ AmlAddPrtEntry ( NewElementNode = NULL;
- Status = ConvertAslNameToAmlName (LinkName, &AmlNameString);
- if (EFI_ERROR (Status)) {
- ASSERT (0);
- goto error_handler;
- }
+ if (LinkName != NULL) {
+ Status = ConvertAslNameToAmlName (LinkName, &AmlNameString);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
- Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
- if (EFI_ERROR (Status)) {
- ASSERT (0);
- goto error_handler;
- }
+ Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
- Status = AmlCreateDataNode (
- EAmlNodeDataTypeNameString,
- (UINT8 *)AmlNameString,
- AmlNameStringSize,
- &DataNode
- );
- if (EFI_ERROR (Status)) {
- ASSERT (0);
- goto error_handler;
- }
+ Status = AmlCreateDataNode (
+ EAmlNodeDataTypeNameString,
+ (UINT8 *)AmlNameString,
+ AmlNameStringSize,
+ &DataNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
- // AmlNameString will be freed before returning.
+ // AmlNameString will be freed be fore returning.
- Status = AmlVarListAddTail (
- (AML_NODE_HANDLE)PackageNode,
- (AML_NODE_HANDLE)DataNode
- );
- if (EFI_ERROR (Status)) {
- ASSERT (0);
- goto error_handler;
- }
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PackageNode,
+ (AML_NODE_HANDLE)DataNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
- DataNode = NULL;
+ DataNode = NULL;
+ } else {
+ Status = AmlCodeGenInteger (0, &NewElementNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PackageNode,
+ (AML_NODE_HANDLE)NewElementNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
+ }
Status = AmlCodeGenInteger (SourceIndex, &NewElementNode);
if (EFI_ERROR (Status)) {
|