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ArmPlatformPkg/PrePiHobListPointerLib: Fixed pointer calculation 

In the PrePi module, the global variables are located at the top of the stack.
At the opposite of the PeiCore where the global variables are located in the
middle of the stack. The top stack region is reserved for Temporary Memory.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12167 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin 2011-08-18 11:23:28 +00:00
parent 3757392733
commit e1808603dc
2 changed files with 16 additions and 19 deletions
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32
ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c
View File

@ -17,14 +17,6 @@
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
//
// Have to use build system to set the original value in case we are running
// from FLASH and globals don't work. So if you do a GetHobList() and gHobList
// and gHobList is NULL the PCD default values are used.
//
VOID *gHobList = NULL;
/**
Returns the pointer to the HOB list.
@ -39,11 +31,10 @@ PrePeiGetHobList (
VOID
)
{
if (gHobList == NULL) {
return (VOID *)*(UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) + (PcdGet32 (PcdCPUCoresNonSecStackSize) / 2) - PcdGet32 (PcdHobListPtrGlobalOffset));
} else {
return gHobList;
}
return (VOID *)*(UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) +
PcdGet32 (PcdCPUCoresNonSecStackSize) -
PcdGet32 (PcdPeiGlobalVariableSize) +
PcdGet32 (PcdHobListPtrGlobalOffset));
}
@ -60,10 +51,15 @@ PrePeiSetHobList (
IN VOID *HobList
)
{
gHobList = HobList;
UINTN* HobListPtr;
//
// If this code is running from ROM this could fail
//
return (gHobList == HobList) ? EFI_SUCCESS: EFI_UNSUPPORTED;
HobListPtr = (UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) +
PcdGet32 (PcdCPUCoresNonSecStackSize) -
PcdGet32 (PcdPeiGlobalVariableSize) +
PcdGet32 (PcdHobListPtrGlobalOffset));
*HobListPtr = (UINTN)HobList;
return EFI_SUCCESS;
}

1
ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointerLib.inf
View File

@ -34,4 +34,5 @@
gArmPlatformTokenSpaceGuid.PcdHobListPtrGlobalOffset
gArmPlatformTokenSpaceGuid.PcdCPUCoresNonSecStackBase
gArmPlatformTokenSpaceGuid.PcdCPUCoresNonSecStackSize
gArmPlatformTokenSpaceGuid.PcdPeiGlobalVariableSize