board: vexpress64: enable bloblist for SPL handoff
Enable bloblist on vexpress64 platforms to facilitate information
passing from TF-A using the firmware handoff framework.
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/board/armltd/vexpress64/Kconfig b/board/armltd/vexpress64/Kconfig
index 584b545..7e87094 100644
--- a/board/armltd/vexpress64/Kconfig
+++ b/board/armltd/vexpress64/Kconfig
@@ -28,7 +28,7 @@
config TARGET_VEXPRESS64_BASE_FVP
bool "Support Versatile Express ARMv8a FVP BASE model"
select VEXPRESS64_BASE_MODEL
- imply OF_HAS_PRIOR_STAGE
+ imply OF_HAS_PRIOR_STAGE if !BLOBLIST
config TARGET_VEXPRESS64_BASER_FVP
bool "Support Versatile Express ARMv8r64 FVP BASE model"
diff --git a/board/armltd/vexpress64/Makefile b/board/armltd/vexpress64/Makefile
index 1878fbe..b0dd1d0 100644
--- a/board/armltd/vexpress64/Makefile
+++ b/board/armltd/vexpress64/Makefile
@@ -3,5 +3,8 @@
# (C) Copyright 2000-2004
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-obj-y := vexpress64.o lowlevel_init.o
+obj-y := vexpress64.o
+
+obj-$(CONFIG_OF_HAS_PRIOR_STAGE) += lowlevel_init.o
+
obj-$(CONFIG_TARGET_VEXPRESS64_JUNO) += pcie.o
diff --git a/board/armltd/vexpress64/vexpress64.c b/board/armltd/vexpress64/vexpress64.c
index b5ede58..0b75c13 100644
--- a/board/armltd/vexpress64/vexpress64.c
+++ b/board/armltd/vexpress64/vexpress64.c
@@ -100,7 +100,9 @@
* Push the variable into the .data section so that it
* does not get cleared later.
*/
+#ifdef CONFIG_OF_HAS_PRIOR_STAGE
unsigned long __section(".data") prior_stage_fdt_address[2];
+#endif
#ifdef CONFIG_OF_BOARD
@@ -151,6 +153,7 @@
}
#endif
+#ifdef CONFIG_OF_HAS_PRIOR_STAGE
/*
* Filter for a valid DTB, as TF-A happens to provide a pointer to some
* data structure using the DTB format, which we cannot use.
@@ -201,6 +204,7 @@
return -ENXIO;
}
#endif
+#endif
/* Actual reset is done via PSCI. */
void reset_cpu(void)
diff --git a/configs/vexpress_fvp_bloblist_defconfig b/configs/vexpress_fvp_bloblist_defconfig
new file mode 100644
index 0000000..dcc87db
--- /dev/null
+++ b/configs/vexpress_fvp_bloblist_defconfig
@@ -0,0 +1,5 @@
+#include <configs/vexpress_fvp_defconfig>
+
+CONFIG_BLOBLIST=y
+CONFIG_BLOBLIST_PASSAGE=y
+CONFIG_BLOBLIST_SIZE_RELOC=0x10000
diff --git a/doc/board/armltd/vexpress64.rst b/doc/board/armltd/vexpress64.rst
index a7f771d..4dadadb 100644
--- a/doc/board/armltd/vexpress64.rst
+++ b/doc/board/armltd/vexpress64.rst
@@ -43,6 +43,22 @@
More details can be found in the board documentation [3]_.
+Bloblist Support
+----------------
+
+The ``vexpress_fvp_bloblist_defconfig`` configures U-Boot to be compiled for
+Vexpress64 with Bloblist as the primary method for information handoff between
+boot stages. U-Boot offers three methods to set up a bloblist: using a
+predefined bloblist at a specified address, dynamically allocating memory for a
+bloblist, or utilizing a standard passage-provided bloblist with automatic size
+detection.
+
+By default, ``vexpress_fvp_bloblist_defconfig`` uses the standard passage method
+(CONFIG_BLOBLIST_PASSAGE) because TF-A provides a Transfer List in non-secure
+memory that U-Boot can utilise. This Bloblist, which is referred to as a Transfer List in
+TF-A, contains all necessary data for the handoff process, including DT and ACPI
+tables.
+
References
----------