diff options
3 files changed, 12 insertions, 3 deletions
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec b/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec index 7ab2405b88..791b45bf50 100644 --- a/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec +++ b/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec @@ -43,6 +43,12 @@ #
gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress|0x0|UINT64|0x00000001
+ #
+ # Padding in bytes to add to the device tree allocation, so that the DTB can
+ # be modified in place (default: 256 bytes)
+ #
+ gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeAllocationPadding|256|UINT32|0x00000002
+
[PcdsDynamic, PcdsFixedAtBuild]
#
# ARM PSCI function invocations can be done either through hypervisor
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.c b/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.c index c500d5964b..bdf2b57fcb 100644 --- a/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.c +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.c @@ -33,6 +33,7 @@ PlatformPeim ( VOID *Base;
VOID *NewBase;
UINTN FdtSize;
+ UINTN FdtPages;
UINT64 *FdtHobData;
UINT64 *UartHobData;
INT32 Node, Prev;
@@ -47,10 +48,11 @@ PlatformPeim ( ASSERT (Base != NULL);
ASSERT (fdt_check_header (Base) == 0);
- FdtSize = fdt_totalsize (Base);
- NewBase = AllocatePages (EFI_SIZE_TO_PAGES (FdtSize));
+ FdtSize = fdt_totalsize (Base) + PcdGet32 (PcdDeviceTreeAllocationPadding);
+ FdtPages = EFI_SIZE_TO_PAGES (FdtSize);
+ NewBase = AllocatePages (FdtPages);
ASSERT (NewBase != NULL);
- CopyMem (NewBase, Base, FdtSize);
+ fdt_open_into (Base, NewBase, EFI_PAGES_TO_SIZE (FdtPages));
FdtHobData = BuildGuidHob (&gFdtHobGuid, sizeof *FdtHobData);
ASSERT (FdtHobData != NULL);
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.inf b/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.inf index 96019e4009..6675a1f915 100644 --- a/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.inf +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/PlatformPeiLib/PlatformPeiLib.inf @@ -40,6 +40,7 @@ gArmTokenSpaceGuid.PcdFvBaseAddress
gArmTokenSpaceGuid.PcdFvSize
gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
+ gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeAllocationPadding
[Guids]
gEarlyPL011BaseAddressGuid
|