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DynamicTablesPkg: AcpiSsdtPcieLibArm: Allow use of segment number as UID 

Add support for selecting to use index or segment number as UID and name.
This allows the path of the nodes to be well known.
For example, if the PCIe node needs to be notified from by an interrupt
for a Generic Event Device

Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Jeff Brasen 2022-09-06 14:33:56 -06:00 committed by mergify[bot]
parent 45297e6c9b
commit 8c92a9508e
3 changed files with 24 additions and 1 deletions
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3
DynamicTablesPkg/DynamicTablesPkg.dec
View File

@ -60,5 +60,8 @@
# Non BSA Compliant 16550 Serial HID
gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdNonBsaCompliant16550SerialHid|""|VOID*|0x40000008
# Use PCI segment numbers as UID
gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdPciUseSegmentAsUid|FALSE|BOOLEAN|0x40000009
[Guids]
gEdkiiDynamicTablesPkgTokenSpaceGuid = { 0xab226e66, 0x31d8, 0x4613, { 0x87, 0x9d, 0xd2, 0xfa, 0xb6, 0x10, 0x26, 0x3c } }

19
DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
View File

@ -981,6 +981,7 @@ BuildSsdtPciTableEx (
UINTN Index;
EFI_ACPI_DESCRIPTION_HEADER **TableList;
ACPI_PCI_GENERATOR *Generator;
UINT32 Uid;
ASSERT (This != NULL);
ASSERT (AcpiTableInfo != NULL);
@ -1036,13 +1037,29 @@ BuildSsdtPciTableEx (
*Table = TableList;
for (Index = 0; Index < PciCount; Index++) {
if (PcdGetBool (PcdPciUseSegmentAsUid)) {
Uid = PciInfo[Index].PciSegmentGroupNumber;
if (Uid > MAX_PCI_ROOT_COMPLEXES_SUPPORTED) {
DEBUG ((
DEBUG_ERROR,
"ERROR: SSDT-PCI: Pci root complexes segment number: %d."
" Greater than maximum number of Pci root complexes supported = %d.\n",
Uid,
MAX_PCI_ROOT_COMPLEXES_SUPPORTED
));
return EFI_INVALID_PARAMETER;
}
} else {
Uid = Index;
}
// Build a SSDT table describing the Pci devices.
Status = BuildSsdtPciTable (
Generator,
CfgMgrProtocol,
AcpiTableInfo,
&PciInfo[Index],
Index,
Uid,
&TableList[Index]
);
if (EFI_ERROR (Status)) {

3
DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf
View File

@ -30,3 +30,6 @@
AmlLib
BaseLib
SsdtPcieSupportLib
[Pcd]
gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdPciUseSegmentAsUid