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
--- board/armltd/vexpress64/Makefile | 3 ++- board/armltd/vexpress64/vexpress64.c | 4 ++++ configs/vexpress_fvp_bloblist_defconfig | 5 +++++ doc/board/armltd/vexpress64.rst | 16 ++++++++++++++++ 4 files changed, 27 insertions(+), 1 deletion(-) create mode 100644 configs/vexpress_fvp_bloblist_defconfig
diff --git a/board/armltd/vexpress64/Makefile b/board/armltd/vexpress64/Makefile index 1878fbed4e..4729787c5e 100644 --- a/board/armltd/vexpress64/Makefile +++ b/board/armltd/vexpress64/Makefile @@ -3,5 +3,6 @@ # (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 b5ede58757..0b75c1358f 100644 --- a/board/armltd/vexpress64/vexpress64.c +++ b/board/armltd/vexpress64/vexpress64.c @@ -100,7 +100,9 @@ int dram_init_banksize(void) * 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 @@ static phys_addr_t find_dtb_in_nor_flash(const char *partname) } #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 @@ int board_fdt_blob_setup(void **fdtp) 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 0000000000..dcc87db872 --- /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 a7f771d266..4dadadb53d 100644 --- a/doc/board/armltd/vexpress64.rst +++ b/doc/board/armltd/vexpress64.rst @@ -43,6 +43,22 @@ Juno is an Arm development board with the following features:
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 ----------