On Fri, Sep 09, 2016 at 09:15:38AM +0100, Ard Biesheuvel wrote: > 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]>
Reviewed-by: Leif Lindholm <[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
