Important note, to make this support works you will need to ensure this PCD
is not present in your DSC file:
gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize|32
Otherwise, only the 32-bit address space will be accessible in UEFI.
From: Olivier Martin [mailto:olivier.mar...@arm.com]
Sent: 28 November 2013 22:00
To: edk2-devel@lists.sourceforge.net; linaro-uefi-internal
Cc: edk2-buildtools-de...@lists.sourceforge.net
Subject: [PATCH] Enabling DRAM above the 32bit address space on AArch64
Here is the patch to enable DRAM region located above the 32-bit address
space in UEFI.
This patch works fine on AArch64. It needs to be applied on SVN rev 14915
(2013-11-28 21:40:48).
This change has been validated on the FVP AArch64 model using 4GB
of DRAM at 0x8_0000_0000:
- # System Memory (2GB)
- gArmTokenSpaceGuid.PcdSystemMemoryBase|0x80000000
- gArmTokenSpaceGuid.PcdSystemMemorySize|0x80000000
+ # System Memory (4GB)
+ gArmTokenSpaceGuid.PcdSystemMemoryBase|0x800000000
+ gArmTokenSpaceGuid.PcdSystemMemorySize|0x100000000
EFI Shell and Linux kernel boot successfully on this use case.
This patch breaks the AArch32 builds. The compilers do not recognize the
format 0x800000000ULL (ie: the 'ULL').
To fix the AArch32 build you need to change
BaseTools/Conf/build_rule.template such as:
--- a/BaseTools/Conf/build_rule.template
+++ b/BaseTools/Conf/build_rule.template
@@ -166,7 +166,7 @@
<Command.GCC, Command.RVCT>
"$(PP)" $(PP_FLAGS) $(INC) ${src} > ${d_path}(+)${s_base}.i
- Trim --source-code -o ${d_path}(+)${s_base}.iii
${d_path}(+)${s_base}.i
+ Trim --trim-long --source-code -o ${d_path}(+)${s_base}.iii
${d_path}(+)${s_base}.i
# For RVCTCYGWIN ASM_FLAGS must be first to work around pathing
issues
"$(ASM)" $(ASM_FLAGS) -o ${dst} $(INC) ${d_path}(+)${s_base}.iii
I will push this change in SVN repository when this change will be accepted
by the BaseTools team and rollback into the SVN EDK2.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin olivier.mar...@arm.com
Thanks,
Olivier
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