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authoroliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524>2013-05-10 12:49:10 +0000
committeroliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524>2013-05-10 12:49:10 +0000
commitb5a572238d3c45ec8d3d0ec2c6ee3e6930458b96 (patch)
treed29b612ce62955afab2a4b4425b9b0a7254cedbc /ArmPlatformPkg
parent2d45f194d98a1ff4f7d78b96a551d903969262b4 (diff)
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ArmPlatform/ArmPlatformLib: Introduced ArmPlatformPeiBootAction()
This function allows platform to do any specific actions prior to the start the PEI phase. For instance, this function could be used by some platforms to initialize clocks that are required at the early stage of the PEI phase. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> Acked-by: Ryan Harkin <ryan.harkin@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14347 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPlatformPkg')
-rw-r--r--ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.S8
-rw-r--r--ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.asm11
-rw-r--r--ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf4
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.S6
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.asm5
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/ArmVExpressLib.inf4
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.S5
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.asm5
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.S7
-rw-r--r--ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.asm5
-rw-r--r--ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S8
-rw-r--r--ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm7
-rw-r--r--ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S4
-rw-r--r--ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm4
-rw-r--r--ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S4
-rw-r--r--ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm4
16 files changed, 77 insertions, 14 deletions
diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.S b/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.S
index 847509f9d2..3baad66431 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.S
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.S
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2012, ARM Limited. All rights reserved.
+// Copyright (c) 2012-2013, 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
@@ -15,8 +15,9 @@
#include <Library/ArmLib.h>
.text
-.align 3
+.align 2
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
@@ -47,3 +48,6 @@ ASM_PFX(ArmPlatformIsPrimaryCore):
moveq r0, #1
movne r0, #0
bx lr
+
+ASM_PFX(ArmPlatformPeiBootAction):
+ bx lr
diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.asm b/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.asm
index 6d35182a27..55b211ea12 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.asm
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbHelper.asm
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2012, ARM Limited. All rights reserved.
+// Copyright (c) 2012-2013, 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
@@ -16,14 +16,14 @@
INCLUDE AsmMacroIoLib.inc
+ EXPORT ArmPlatformPeiBootAction
EXPORT ArmPlatformGetCorePosition
EXPORT ArmPlatformIsPrimaryCore
IMPORT _gPcd_FixedAtBuild_PcdArmPrimaryCore
IMPORT _gPcd_FixedAtBuild_PcdArmPrimaryCoreMask
- PRESERVE8
- AREA ArmPlatformNullHelper, CODE, READONLY
+ AREA ArmRealViewEbHelper, CODE, READONLY
//UINTN
//ArmPlatformGetCorePosition (
@@ -52,5 +52,8 @@ ArmPlatformIsPrimaryCore FUNCTION
bx lr
ENDFUNC
- END
+ArmPlatformPeiBootAction FUNCTION
+ bx lr
+ ENDFUNC
+ END
diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf b/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf
index a8fe3b4ce3..a97ee41c4a 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf
@@ -1,5 +1,5 @@
#/* @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
@@ -32,6 +32,8 @@
MemoryAllocationLib
[Sources.common]
+ ArmRealViewEbHelper.asm | RVCT
+ ArmRealViewEbHelper.S | GCC
ArmRealViewEb.c
ArmRealViewEbMem.c
ArmRealViewEbHelper.asm | RVCT
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.S b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.S
index 09cfc827a1..b560f56c51 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.S
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.S
@@ -17,11 +17,15 @@
#include <ArmPlatform.h>
.text
-.align 3
+.align 2
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
+ASM_PFX(ArmPlatformPeiBootAction):
+ bx lr
+
//UINTN
//ArmPlatformGetCorePosition (
// IN UINTN MpId
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.asm b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.asm
index 1b5474b5f2..0ae95f5dbd 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.asm
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA15-A7/CTA15-A7Helper.asm
@@ -18,12 +18,17 @@
INCLUDE AsmMacroIoLib.inc
+ EXPORT ArmPlatformPeiBootAction
EXPORT ArmPlatformGetCorePosition
EXPORT ArmPlatformIsPrimaryCore
PRESERVE8
AREA CTA15A7Helper, CODE, READONLY
+ArmPlatformPeiBootAction FUNCTION
+ bx lr
+ ENDFUNC
+
//UINTN
//ArmPlatformGetCorePosition (
// IN UINTN MpId
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/ArmVExpressLib.inf b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/ArmVExpressLib.inf
index 5a44eb5f70..d160a4fc91 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/ArmVExpressLib.inf
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/ArmVExpressLib.inf
@@ -1,5 +1,5 @@
#/* @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
@@ -37,6 +37,8 @@
SerialPortLib
[Sources.common]
+ CTA9x4Helper.asm | RVCT
+ CTA9x4Helper.S | GCC
CTA9x4.c
CTA9x4Mem.c
CTA9x4Helper.S | GCC
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.S b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.S
index fc7312b6f1..e12b8cd4e9 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.S
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.S
@@ -17,8 +17,8 @@
.text
.align 2
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
-GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
@@ -56,4 +56,7 @@ ASM_PFX(ArmPlatformGetCorePosition):
and r0, r0, #ARM_CORE_MASK
bx lr
+ASM_PFX(ArmPlatformPeiBootAction):
+ bx lr
+
ASM_FUNCTION_REMOVE_IF_UNREFERENCED
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.asm b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.asm
index c2db346723..9508cedd84 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.asm
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Helper.asm
@@ -18,6 +18,7 @@
INCLUDE AsmMacroIoLib.inc
+ EXPORT ArmPlatformPeiBootAction
EXPORT ArmPlatformIsPrimaryCore
EXPORT ArmPlatformGetPrimaryCoreMpId
EXPORT ArmPlatformGetCorePosition
@@ -62,4 +63,8 @@ ArmPlatformGetCorePosition FUNCTION
bx lr
ENDFUNC
+ArmPlatformPeiBootAction FUNCTION
+ bx lr
+ ENDFUNC
+
END
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.S b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.S
index 1c256af241..95006c5f25 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.S
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.S
@@ -16,12 +16,14 @@
#include <Library/ArmLib.h>
#include <Library/PcdLib.h>
#include <AutoGen.h>
+#include "AsmMacroIoLib.inc"
#include <Chipset/ArmCortexA9.h>
.text
.align 2
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
GCC_ASM_EXPORT(ArmGetCpuCountPerCluster)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
@@ -30,6 +32,9 @@ GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
+ASM_PFX(ArmPlatformPeiBootAction):
+ bx lr
+
# IN None
# OUT r0 = SCU Base Address
ASM_PFX(ArmGetScuBaseAddress):
@@ -37,7 +42,7 @@ ASM_PFX(ArmGetScuBaseAddress):
# the Configuration BAR as a stack is not necessary setup. The SCU is at the
# offset 0x0000 from the Private Memory Region.
mrc p15, 4, r0, c15, c0, 0
- bx lr
+ bx lr
//UINTN
//ArmPlatformGetPrimaryCoreMpId (
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.asm b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.asm
index 02b9f0f4a7..5befec31ef 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.asm
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.asm
@@ -22,6 +22,7 @@
INCLUDE AsmMacroIoLib.inc
+ EXPORT ArmPlatformPeiBootAction
EXPORT ArmGetCpuCountPerCluster
EXPORT ArmPlatformIsPrimaryCore
EXPORT ArmPlatformGetPrimaryCoreMpId
@@ -32,6 +33,10 @@
AREA RTSMHelper, CODE, READONLY
+ArmPlatformPeiBootAction FUNCTION
+ bx lr
+ ENDFUNC
+
// IN None
// OUT r0 = SCU Base Address
ArmGetScuBaseAddress FUNCTION
diff --git a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S
index e6f2a9e380..49f3fde667 100644
--- a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S
+++ b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2012, ARM Limited. All rights reserved.
+// Copyright (c) 2012-2013, 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
@@ -15,8 +15,9 @@
#include <Library/ArmLib.h>
.text
-.align 3
+.align 2
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
@@ -24,6 +25,9 @@ GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
+ASM_PFX(ArmPlatformPeiBootAction):
+ bx lr
+
//UINTN
//ArmPlatformGetCorePosition (
// IN UINTN MpId
diff --git a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm
index 84f1ee35bf..6047ca25c4 100644
--- a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm
+++ b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2012, ARM Limited. All rights reserved.
+// Copyright (c) 2012-2013, 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
@@ -16,6 +16,7 @@
INCLUDE AsmMacroIoLib.inc
+ EXPORT ArmPlatformPeiBootAction
EXPORT ArmPlatformGetCorePosition
EXPORT ArmPlatformGetPrimaryCoreMpId
EXPORT ArmPlatformIsPrimaryCore
@@ -26,6 +27,10 @@
PRESERVE8
AREA ArmPlatformNullHelper, CODE, READONLY
+ArmPlatformPeiBootAction FUNCTION
+ bx lr
+ ENDFUNC
+
//UINTN
//ArmPlatformGetCorePosition (
// IN UINTN MpId
diff --git a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
index 3b463eabee..af4350b0cb 100644
--- a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
+++ b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
@@ -23,11 +23,15 @@ GCC_ASM_IMPORT(CEntryPoint)
GCC_ASM_IMPORT(ArmPlatformGetCorePosition)
GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_IMPORT(ArmReadMpidr)
+GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
GCC_ASM_EXPORT(_ModuleEntryPoint)
StartupAddr: .word CEntryPoint
ASM_PFX(_ModuleEntryPoint):
+ // Do early platform specific actions
+ bl ASM_PFX(ArmPlatformPeiBootAction)
+
// Identify CPU ID
bl ASM_PFX(ArmReadMpidr)
// Keep a copy of the MpId register value
diff --git a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
index 1510fb84d0..be1a767696 100644
--- a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
+++ b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
@@ -22,6 +22,7 @@
IMPORT ArmPlatformGetCorePosition
IMPORT ArmPlatformIsPrimaryCore
IMPORT ArmReadMpidr
+ IMPORT ArmPlatformPeiBootAction
EXPORT _ModuleEntryPoint
PRESERVE8
@@ -30,6 +31,9 @@
StartupAddr DCD CEntryPoint
_ModuleEntryPoint
+ // Do early platform specific actions
+ bl ArmPlatformPeiBootAction
+
// Identify CPU ID
bl ArmReadMpidr
// Keep a copy of the MpId register value
diff --git a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
index da654c7a35..3d4e1e9279 100644
--- a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
+++ b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
@@ -24,6 +24,7 @@
GCC_ASM_IMPORT(CEntryPoint)
GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_IMPORT(ArmReadMpidr)
+GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
GCC_ASM_IMPORT(ArmPlatformStackSet)
GCC_ASM_EXPORT(_ModuleEntryPoint)
@@ -31,6 +32,9 @@ StartupAddr: .word CEntryPoint
ASM_PFX(_ModuleEntryPoint):
+ // Do early platform specific actions
+ bl ASM_PFX(ArmPlatformPeiBootAction)
+
// Get ID of this CPU in Multicore system
bl ASM_PFX(ArmReadMpidr)
// Keep a copy of the MpId register value
diff --git a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm
index b78729fbc2..993fccfa47 100644
--- a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm
+++ b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm
@@ -23,6 +23,7 @@
IMPORT CEntryPoint
IMPORT ArmPlatformIsPrimaryCore
IMPORT ArmReadMpidr
+ IMPORT ArmPlatformPeiBootAction
IMPORT ArmPlatformStackSet
EXPORT _ModuleEntryPoint
@@ -33,6 +34,9 @@
StartupAddr DCD CEntryPoint
_ModuleEntryPoint
+ // Do early platform specific actions
+ bl ArmPlatformPeiBootAction
+
// Get ID of this CPU in Multicore system
bl ArmReadMpidr
// Keep a copy of the MpId register value