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ArmPlatformPkg/PrePi: Make dynamic the top of the System Memory

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This change allows to change the top of the System Memory that
was hardcoded by:
FixedPcdGet64 (PcdSystemMemoryBase) + FixedPcdGet64 (PcdSystemMemorySize)

It allows to add support when the Trusted Firmware reserves the
top of the System Memory as Trusted. The size of this region
might not be known in advance.

Note: The reason why the start of the System Memory has not been
made dynamic is because the early code calculates where to place
the stack from the top of the System Memory.
So there is no need to make the start of the System Memory a
dynamic value at the early stage of the boot phase.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <Olivier.Martin@arm.com>
Reviewed-by: Ronald Cron <Ronald.Cron@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17835 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin
2015-07-06 16:56:31 +00:00
committed by oliviermartin
parent 40a3f38f67
commit 5dbacdb21b
7 changed files with 72 additions and 31 deletions
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4
ArmPlatformPkg/PrePi/PrePi.c
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@@ -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 ();