[edk2-devel] [PATCH v3 2/3] DynamicTablesPkg: AcpiSsdtPcieLibArm: Support UID > 0xF

[Jeff Brasen via groups.io]

Add support for PCIe devices with UID > 0xF.
This is done by using the next value in the name so
PCI5, PC26, etc

Signed-off-by: Jeff Brasen <jbrasen at nvidia.com>
---
 .../Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c  | 5 ++++-
 .../Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.h  | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
index d4c5f47b07..68ecae96be 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
@@ -824,7 +824,10 @@ GeneratePciDevice (
 
   // Write the name of the PCI device.
   CopyMem (AslName, "PCIx", AML_NAME_SEG_SIZE + 1);
-  AslName[AML_NAME_SEG_SIZE - 1] = AsciiFromHex (Uid);
+  AslName[AML_NAME_SEG_SIZE - 1] = AsciiFromHex (Uid & 0xF);
+  if (Uid > 0xF) {
+    AslName[AML_NAME_SEG_SIZE - 2] = AsciiFromHex ((Uid >> 4) & 0xF);
+  }
 
   // ASL: Device (PCIx) {}
   Status = AmlCodeGenDevice (AslName, ScopeNode, &PciNode);
diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.h b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.h
index 59a0d601a3..515a3e1785 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.h
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.h
@@ -31,7 +31,7 @@
         Corresponding changes would be needed to support the Name and
         UID fields describing the Pci root complexes.
 */
-#define MAX_PCI_ROOT_COMPLEXES_SUPPORTED  16
+#define MAX_PCI_ROOT_COMPLEXES_SUPPORTED  256
 
 // _SB scope of the AML namespace.
 #define SB_SCOPE  "\\_SB_"
-- 
2.25.1



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