If DTB_DIR=<path> is set during the build, incorporate DTBs from
that path for all AArch64 FVP platform variants so that they can
be loaded straight from the firmware image instead of from a file
system. This relieves a user of having to keep a DTB file with the
right name in the working directory of the model.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
 ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.fdf | 25 
++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.fdf 
b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.fdf
index 1c709771b571..0076d3da0cb5 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.fdf
+++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.fdf
@@ -210,6 +210,31 @@ READ_LOCK_STATUS   = TRUE
   # FV Filesystem
   INF MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystemDxe.inf
 
+!ifdef $(DTB_DIR)
+  #
+  # Embed flattened device tree (FDT) images for all known
+  # variants of this platform
+  #
+  FILE RAW = PCD (gArmVExpressTokenSpaceGuid.PcdFdtFvpBaseAEMv8x4GicV2) {
+    $(DTB_DIR)/fvp-base-gicv2-psci.dtb
+  }
+  FILE RAW = PCD (gArmVExpressTokenSpaceGuid.PcdFdtFvpBaseAEMv8x4GicV2Legacy) {
+    $(DTB_DIR)/fvp-base-gicv2legacy-psci.dtb
+  }
+  FILE RAW = PCD (gArmVExpressTokenSpaceGuid.PcdFdtFvpBaseAEMv8x4GicV3) {
+    $(DTB_DIR)/fvp-base-gicv3-psci.dtb
+  }
+  FILE RAW = PCD (gArmVExpressTokenSpaceGuid.PcdFdtFvpFoundationGicV2) {
+    $(DTB_DIR)/fvp-foundation-gicv2-psci.dtb
+  }
+  FILE RAW = PCD (gArmVExpressTokenSpaceGuid.PcdFdtFvpFoundationGicV2Legacy) {
+    $(DTB_DIR)/fvp-foundation-gicv2legacy-psci.dtb
+  }
+  FILE RAW = PCD (gArmVExpressTokenSpaceGuid.PcdFdtFvpFoundationGicV3) {
+    $(DTB_DIR)/fvp-foundation-gicv3-psci.dtb
+  }
+!endif
+
 [FV.FVMAIN_COMPACT]
 FvAlignment        = 16
 ERASE_POLARITY     = 1
-- 
1.9.1


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