summaryrefslogtreecommitdiff
path: root/ArmPlatformPkg/PrePi
diff options
context:
space:
mode:
Diffstat (limited to 'ArmPlatformPkg/PrePi')
-rw-r--r--ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S27
-rw-r--r--ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S27
-rw-r--r--ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm25
-rwxr-xr-xArmPlatformPkg/PrePi/PrePi.c4
-rw-r--r--ArmPlatformPkg/PrePi/PrePi.h4
5 files changed, 64 insertions, 23 deletions
diff --git a/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
index fcea9496cb..2c4a7e5324 100644
--- a/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
+++ b/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+// Copyright (c) 2011-2015, 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
@@ -24,8 +24,10 @@ GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
GCC_ASM_IMPORT(ArmPlatformStackSet)
GCC_ASM_EXPORT(_ModuleEntryPoint)
+GCC_ASM_EXPORT(mSystemMemoryEnd)
-StartupAddr: .8byte ASM_PFX(CEntryPoint)
+StartupAddr: .8byte ASM_PFX(CEntryPoint)
+mSystemMemoryEnd: .8byte 0
ASM_PFX(_ModuleEntryPoint):
// Do early platform specific actions
@@ -40,12 +42,23 @@ _SetSVCMode:
// Check if we can install the stack at the top of the System Memory or if we need
// to install the stacks at the bottom of the Firmware Device (case the FD is located
// at the top of the DRAM)
-_SetupStackPosition:
- // Compute Top of System Memory
- LoadConstantToReg (FixedPcdGet64 (PcdSystemMemoryBase), x1)
- LoadConstantToReg (FixedPcdGet64 (PcdSystemMemorySize), x2)
+_SystemMemoryEndInit:
+ ldr x1, mSystemMemoryEnd
+
+ // Is mSystemMemoryEnd initialized?
+ cmp x1, #0
+ bne _SetupStackPosition
+
+ LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryBase), x1)
+ LoadConstantToReg (FixedPcdGet32(PcdSystemMemorySize), x2)
sub x2, x2, #1
- add x1, x1, x2 // x1 = SystemMemoryTop = PcdSystemMemoryBase + PcdSystemMemorySize
+ add x1, x1, x2
+ // Update the global variable
+ adr x2, mSystemMemoryEnd
+ str x1, [x2]
+
+_SetupStackPosition:
+ // r1 = SystemMemoryTop
// Calculate Top of the Firmware Device
LoadConstantToReg (FixedPcdGet32(PcdFdBaseAddress), x2)
diff --git a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
index f00960f166..f64934480f 100644
--- a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
+++ b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2011-2014, ARM Limited. All rights reserved.
+// Copyright (c) 2011-2015, 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
@@ -27,8 +27,10 @@ GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
GCC_ASM_IMPORT(ArmPlatformStackSet)
GCC_ASM_EXPORT(_ModuleEntryPoint)
+GCC_ASM_EXPORT(mSystemMemoryEnd)
-StartupAddr: .word CEntryPoint
+StartupAddr: .word CEntryPoint
+mSystemMemoryEnd: .8byte 0
ASM_PFX(_ModuleEntryPoint):
@@ -48,12 +50,23 @@ _SetSVCMode:
// Check if we can install the stack at the top of the System Memory or if we need
// to install the stacks at the bottom of the Firmware Device (case the FD is located
// at the top of the DRAM)
-_SetupStackPosition:
- // Compute Top of System Memory
- LoadConstantToReg (FixedPcdGet64 (PcdSystemMemoryBase), r1)
- LoadConstantToReg (FixedPcdGet64 (PcdSystemMemorySize), r2)
+_SystemMemoryEndInit:
+ ldr r1, mSystemMemoryEnd
+
+ // Is mSystemMemoryEnd initialized?
+ cmp r1, #0
+ bne _SetupStackPosition
+
+ LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryBase), r1)
+ LoadConstantToReg (FixedPcdGet32(PcdSystemMemorySize), r2)
sub r2, r2, #1
- add r1, r1, r2 // r1 = SystemMemoryTop = PcdSystemMemoryBase + PcdSystemMemorySize
+ add r1, r1, r2
+ // Update the global variable
+ adr r2, mSystemMemoryEnd
+ str r1, [r2]
+
+_SetupStackPosition:
+ // r1 = SystemMemoryTop
// Calculate Top of the Firmware Device
LoadConstantToReg (FixedPcdGet32(PcdFdBaseAddress), r2)
diff --git a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm
index cbb3a08008..f73c56850d 100644
--- a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm
+++ b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2011-2014, ARM Limited. All rights reserved.
+// Copyright (c) 2011-2015, 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
@@ -27,11 +27,13 @@
IMPORT ArmPlatformStackSet
EXPORT _ModuleEntryPoint
+ EXPORT mSystemMemoryEnd
PRESERVE8
AREA PrePiCoreEntryPoint, CODE, READONLY
StartupAddr DCD CEntryPoint
+mSystemMemoryEnd DCQ 0
_ModuleEntryPoint
// Do early platform specific actions
@@ -50,12 +52,23 @@ _SetSVCMode
// Check if we can install the stack at the top of the System Memory or if we need
// to install the stacks at the bottom of the Firmware Device (case the FD is located
// at the top of the DRAM)
-_SetupStackPosition
- // Compute Top of System Memory
- LoadConstantToReg (FixedPcdGet64 (PcdSystemMemoryBase), r1)
- LoadConstantToReg (FixedPcdGet64 (PcdSystemMemorySize), r2)
+_SystemMemoryEndInit
+ ldr r1, mSystemMemoryEnd
+
+ // Is mSystemMemoryEnd initialized?
+ cmp r1, #0
+ bne _SetupStackPosition
+
+ LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryBase), r1)
+ LoadConstantToReg (FixedPcdGet32(PcdSystemMemorySize), r2)
sub r2, r2, #1
- add r1, r1, r2 // r1 = SystemMemoryTop = PcdSystemMemoryBase + PcdSystemMemorySize
+ add r1, r1, r2
+ // Update the global variable
+ adr r2, mSystemMemoryEnd
+ str r1, [r2]
+
+_SetupStackPosition
+ // r1 = SystemMemoryTop
// Calculate Top of the Firmware Device
LoadConstantToReg (FixedPcdGet32(PcdFdBaseAddress), r2)
diff --git a/ArmPlatformPkg/PrePi/PrePi.c b/ArmPlatformPkg/PrePi/PrePi.c
index 9a5e067ef5..99afe6fa90 100755
--- a/ArmPlatformPkg/PrePi/PrePi.c
+++ b/ArmPlatformPkg/PrePi/PrePi.c
@@ -30,7 +30,7 @@
#include "PrePi.h"
#include "LzmaDecompress.h"
-#define IS_XIP() (((UINT32)FixedPcdGet32 (PcdFdBaseAddress) > (UINT32)(FixedPcdGet64 (PcdSystemMemoryBase) + FixedPcdGet32 (PcdSystemMemorySize))) || \
+#define IS_XIP() (((UINT32)FixedPcdGet32 (PcdFdBaseAddress) > mSystemMemoryEnd) || \
((FixedPcdGet32 (PcdFdBaseAddress) + FixedPcdGet32 (PcdFdSize)) < FixedPcdGet64 (PcdSystemMemoryBase)))
// Not used when PrePi in run in XIP mode
@@ -109,7 +109,7 @@ PrePiMain (
// If ensure the FD is either part of the System Memory or totally outside of the System Memory (XIP)
ASSERT (IS_XIP() ||
((FixedPcdGet32 (PcdFdBaseAddress) >= FixedPcdGet64 (PcdSystemMemoryBase)) &&
- ((UINT32)(FixedPcdGet32 (PcdFdBaseAddress) + FixedPcdGet32 (PcdFdSize)) <= (UINT32)(FixedPcdGet64 (PcdSystemMemoryBase) + FixedPcdGet64 (PcdSystemMemorySize)))));
+ ((UINT32)(FixedPcdGet32 (PcdFdBaseAddress) + FixedPcdGet32 (PcdFdSize)) <= (UINT32)mSystemMemoryEnd)));
// Initialize the architecture specific bits
ArchInitialize ();
diff --git a/ArmPlatformPkg/PrePi/PrePi.h b/ArmPlatformPkg/PrePi/PrePi.h
index e67795f449..6e90c2afc8 100644
--- a/ArmPlatformPkg/PrePi/PrePi.h
+++ b/ArmPlatformPkg/PrePi/PrePi.h
@@ -1,6 +1,6 @@
/** @file
*
-* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
+* Copyright (c) 2011-2015, 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
@@ -29,6 +29,8 @@
#define SerialPrint(txt) SerialPortWrite (txt, AsciiStrLen(txt)+1);
+extern UINT64 mSystemMemoryEnd;
+
RETURN_STATUS
EFIAPI
TimerConstructor (
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 23:31:27 +0000