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ArmVirtPkg/PrePi: remove mSystemMemoryEnd

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Recording the top of SEC visible system memory in a global variable is
not necessary, and violates the constraints of the SEC/PEI environment,
given that it may execute from NOR flash. So remove it.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Ard Biesheuvel
2016-10-24 09:22:22 +01:00
parent c112e371ce
commit 5b005a6b32
3 changed files with 1 additions and 15 deletions
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8
ArmVirtPkg/PrePi/Arm/ModuleEntryPoint.S
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@@ -14,8 +14,6 @@
#include <AsmMacroIoLib.h>
ASM_GLOBAL ASM_PFX(mSystemMemoryEnd)
ASM_FUNC(_ModuleEntryPoint)
//
// We are built as a ET_DYN PIE executable, so we need to process all
@@ -66,12 +64,10 @@ _SetupStackPosition:
ADRL (r12, PcdGet64 (PcdSystemMemorySize))
ldrd r2, r3, [r12]
// calculate the top of memory, and record it in mSystemMemoryEnd
// calculate the top of memory
adds r2, r2, r1
sub r2, r2, #1
addcs r3, r3, #1
adr r12, mSystemMemoryEnd
strd r2, r3, [r12]
// truncate the memory used by UEFI to 4 GB range
teq r3, #0
@@ -159,5 +155,3 @@ _PrepareArguments:
_NeverReturn:
b _NeverReturn
ASM_PFX(mSystemMemoryEnd): .quad 0