We can cover the entire MMIO range and 512 GB of memory starting at 0x80_0000_0000 using 40 bits of VA space, both in the page tables and in the GCD memory map.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <[email protected]> --- Platforms/AMD/Styx/CelloBoard/CelloBoard.dsc | 5 +++++ Platforms/AMD/Styx/OverdriveBoard/OverdriveBoard.dsc | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/Platforms/AMD/Styx/CelloBoard/CelloBoard.dsc b/Platforms/AMD/Styx/CelloBoard/CelloBoard.dsc index 8a100e0d9a3c..0a987cc3b118 100644 --- a/Platforms/AMD/Styx/CelloBoard/CelloBoard.dsc +++ b/Platforms/AMD/Styx/CelloBoard/CelloBoard.dsc @@ -375,6 +375,11 @@ DEFINE DO_KCS = 0 # Size of the region used by UEFI in permanent memory (Reserved 64MB) gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000 + # 40 bits of VA space is sufficient to support up to 512 GB of RAM in the + # range 0x80_0000_0000 - 0xFF_FFFF_FFFF (all platform and PCI MMIO is below + # that) + gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize|40 + # # ARM PrimeCell # diff --git a/Platforms/AMD/Styx/OverdriveBoard/OverdriveBoard.dsc b/Platforms/AMD/Styx/OverdriveBoard/OverdriveBoard.dsc index 38c3309dcff1..72ceb8b6994e 100644 --- a/Platforms/AMD/Styx/OverdriveBoard/OverdriveBoard.dsc +++ b/Platforms/AMD/Styx/OverdriveBoard/OverdriveBoard.dsc @@ -382,6 +382,11 @@ DEFINE DO_KCS = 1 # Size of the region used by UEFI in permanent memory (Reserved 64MB) gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000 + # 40 bits of VA space is sufficient to support up to 512 GB of RAM in the + # range 0x80_0000_0000 - 0xFF_FFFF_FFFF (all platform and PCI MMIO is below + # that) + gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize|40 + # # ARM PrimeCell # -- 2.7.4 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
