Hi Sami,
Tested-by: Pierre Gondois <pierre.gond...@arm.com>
On 4/17/23 15:22, Sami Mujawar wrote:
For older FVPs (without support for RME extension) the top 16MB of
DRAM1 is reserved as Trusted DRAM. However, the latest FVP Base RevC
AEM Model [1] has support for RME extension. When RME extension is
present the top 64MB of DRAM1 (i.e. at the top of the 32bit address
space) is carved out for four-world support in TF-A [2].
Therefore, reduce the System Memory size by 64MB.
Reference:
[1] FVP Base RevC AEM Model (available on x86_64 / Arm64 Linux)
(https://developer.arm.com/Tools%20and%20Software/
Fixed%20Virtual%20Platforms)
[2] commit c872072 (https://review.trustedfirmware.org/plugins/gitiles/
TF-A/trusted-firmware-a/+/c8720729726faffc39ec64f3a02440a48c8c305a))
Signed-off-by: Sami Mujawar <sami.muja...@arm.com>
---
Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc
b/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc
index
dc081794cf98a27c667ef85bd27dacd80e9e8bd2..f70a4d52ba06f570e017ab5286f06d87193753e5
100644
--- a/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc
+++ b/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc
@@ -107,9 +107,12 @@ [PcdsFixedAtBuild.common]
gArmPlatformTokenSpaceGuid.PcdCPUCorePrimaryStackSize|0x4000
gArmPlatformTokenSpaceGuid.PcdCPUCoreSecondaryStackSize|0x0
- # System Memory (2GB - 16MB of Trusted DRAM at the top of the 32bit address space)
+ # System Memory
+ # When RME is supported by the FVP the top 64MB of DRAM1 (i.e. at the top
+ # of the 32bit address space) is reserved for four-world support in TF-A.
+ # Therefore, set the default System Memory size to (2GB - 64MB).
gArmTokenSpaceGuid.PcdSystemMemoryBase|0x80000000
- gArmTokenSpaceGuid.PcdSystemMemorySize|0x7F000000
+ gArmTokenSpaceGuid.PcdSystemMemorySize|0x7C000000
# Size of the region used by UEFI in permanent memory (Reserved 64MB)
gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000
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