X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=ArmPkg%2FInclude%2FLibrary%2FArmGicLib.h;fp=ArmPkg%2FInclude%2FLibrary%2FArmGicLib.h;h=e3ef228dba2ee1e199c0d8cd6668c8a9178d3705;hp=f2d4c7b27ce02b982460e87941f2f14d6cd377e9;hb=1b0ac0dedf19041512de152f047cc5a943598521;hpb=f5241b5725aab99189c733df6b03687656f8b1e8

diff --git a/ArmPkg/Include/Library/ArmGicLib.h b/ArmPkg/Include/Library/ArmGicLib.h
index f2d4c7b27c..e3ef228dba 100644
--- a/ArmPkg/Include/Library/ArmGicLib.h
+++ b/ArmPkg/Include/Library/ArmGicLib.h
@@ -140,10 +140,24 @@ ArmGicSendSgiTo (
   IN  INTN          SgiId
   );
 
+/*
+ * Acknowledge and return the value of the Interrupt Acknowledge Register
+ *
+ * InterruptId is returned separately from the register value because in
+ * the GICv2 the register value contains the CpuId and InterruptId while
+ * in the GICv3 the register value is only the InterruptId.
+ *
+ * @param GicInterruptInterfaceBase   Base Address of the GIC CPU Interface
+ * @param InterruptId                 InterruptId read from the Interrupt Acknowledge Register
+ *
+ * @retval value returned by the Interrupt Acknowledge Register
+ *
+ */
 UINTN
 EFIAPI
 ArmGicAcknowledgeInterrupt (
-  IN  UINTN          GicInterruptInterfaceBase
+  IN  UINTN          GicInterruptInterfaceBase,
+  OUT UINTN          *InterruptId
   );
 
 VOID