From 2ca815a4952ca3ef3bdb01f5dd2a1ee0a57ac319 Mon Sep 17 00:00:00 2001
From: Olivier Martin <olivier.martin@arm.com>
Date: Fri, 4 Jul 2014 11:13:27 +0000
Subject: ArmPkg/ArmGic: Move out the EndOfInterrupt from the interrupt
 acknowledgement

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15619 6f19259b-4bc3-4df7-8a09-765794883524
---
 ArmPkg/Drivers/ArmGic/ArmGic.c      | 29 ++++-------------------------
 ArmPkg/Drivers/ArmGic/ArmGicDxe.c   |  4 ++--
 ArmPkg/Drivers/ArmGic/ArmGicDxe.inf |  2 +-
 ArmPkg/Include/Library/ArmGicLib.h  | 10 +++++-----
 4 files changed, 12 insertions(+), 33 deletions(-)

(limited to 'ArmPkg')

diff --git a/ArmPkg/Drivers/ArmGic/ArmGic.c b/ArmPkg/Drivers/ArmGic/ArmGic.c
index 25bd376027..1717368a7e 100644
--- a/ArmPkg/Drivers/ArmGic/ArmGic.c
+++ b/ArmPkg/Drivers/ArmGic/ArmGic.c
@@ -1,6 +1,6 @@
 /** @file
 *
-*  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
+*  Copyright (c) 2011-2013, ARM Limited. All rights reserved.
 *  
 *  This program and the accompanying materials                          
 *  are licensed and made available under the terms and conditions of the BSD License         
@@ -38,35 +38,14 @@ ArmGicSendSgiTo (
   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDSGIR, ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId);
 }
 
-RETURN_STATUS
+UINTN
 EFIAPI
 ArmGicAcknowledgeInterrupt (
-  IN  UINTN          GicDistributorBase,
-  IN  UINTN          GicInterruptInterfaceBase,
-  OUT UINTN          *CoreId,
-  OUT UINTN          *InterruptId
+  IN  UINTN          GicInterruptInterfaceBase
   )
 {
-  UINT32            Interrupt;
-
   // Read the Interrupt Acknowledge Register
-  Interrupt = MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIAR);
-
-  // Check if it is a valid interrupt ID
-  if ((Interrupt & 0x3FF) < ArmGicGetMaxNumInterrupts (GicDistributorBase)) {
-    // Got a valid SGI number hence signal End of Interrupt by writing to ICCEOIR
-    ArmGicEndOfInterrupt (GicInterruptInterfaceBase, Interrupt);
-
-    if (CoreId) {
-      *CoreId = (Interrupt >> 10) & 0x7;
-    }
-    if (InterruptId) {
-      *InterruptId = Interrupt & 0x3FF;
-    }
-    return RETURN_SUCCESS;
-  } else {
-    return RETURN_INVALID_PARAMETER;
-  }
+  return MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIAR);
 }
 
 VOID
diff --git a/ArmPkg/Drivers/ArmGic/ArmGicDxe.c b/ArmPkg/Drivers/ArmGic/ArmGicDxe.c
index e227f19940..9608c314ed 100644
--- a/ArmPkg/Drivers/ArmGic/ArmGicDxe.c
+++ b/ArmPkg/Drivers/ArmGic/ArmGicDxe.c
@@ -252,10 +252,10 @@ IrqInterruptHandler (
   UINT32                      GicInterrupt;
   HARDWARE_INTERRUPT_HANDLER  InterruptHandler;
 
-  GicInterrupt = MmioRead32 (PcdGet32(PcdGicInterruptInterfaceBase) + ARM_GIC_ICCIAR);
+  GicInterrupt = ArmGicAcknowledgeInterrupt (PcdGet32(PcdGicInterruptInterfaceBase));
 
   // Special Interrupts (ID1020-ID1023) have an Interrupt ID greater than the number of interrupt (ie: Spurious interrupt).
-  if (GicInterrupt >= mGicNumInterrupts) {
+  if ((GicInterrupt & ARM_GIC_ICCIAR_ACKINTID) >= mGicNumInterrupts) {
     // The special interrupt do not need to be acknowledge
     return;
   }
diff --git a/ArmPkg/Drivers/ArmGic/ArmGicDxe.inf b/ArmPkg/Drivers/ArmGic/ArmGicDxe.inf
index 9dc557a037..3974f3c37d 100644
--- a/ArmPkg/Drivers/ArmGic/ArmGicDxe.inf
+++ b/ArmPkg/Drivers/ArmGic/ArmGicDxe.inf
@@ -1,7 +1,7 @@
 #/** @file
 #  
 #  Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
-#  Copyright (c) 2012, ARM Ltd. All rights reserved.<BR>
+#  Copyright (c) 2012 - 2013, ARM Ltd. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
diff --git a/ArmPkg/Include/Library/ArmGicLib.h b/ArmPkg/Include/Library/ArmGicLib.h
index b35d4a794c..af8941905b 100644
--- a/ArmPkg/Include/Library/ArmGicLib.h
+++ b/ArmPkg/Include/Library/ArmGicLib.h
@@ -76,6 +76,9 @@
 #define ARM_GIC_ICCIDR_GET_REVISION(IccIdr)     (((IccIdr) >> 12) & 0xF)
 #define ARM_GIC_ICCIDR_GET_IMPLEMENTER(IccIdr)  ((IccIdr) & 0xFFF)
 
+// Bit Mask for
+#define ARM_GIC_ICCIAR_ACKINTID                 0x3FF
+
 //
 // GIC Secure interfaces
 //
@@ -128,13 +131,10 @@ ArmGicSendSgiTo (
   IN  INTN          SgiId
   );
 
-RETURN_STATUS
+UINTN
 EFIAPI
 ArmGicAcknowledgeInterrupt (
-  IN  UINTN          GicDistributorBase,
-  IN  UINTN          GicInterruptInterfaceBase,
-  OUT UINTN          *CoreId,
-  OUT UINTN          *InterruptId
+  IN  UINTN          GicInterruptInterfaceBase
   );
 
 VOID
-- 
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