For AST2600 SPL with CONFIG_SPL_SEPARATE_BSS=y and CONFIG_OF_SEPARATE=y, fdt_find_separate() expects the appended control DTB at _image_binary_end.
The AST2600 SPL linker script aligned _image_binary_end via the .binman_sym_table section. In builds where that section has no emitted contents, objcopy -O binary does not include the alignment bytes in spl/u-boot-spl-nodtb.bin. This causes the nodtb binary to end before _image_binary_end, so the appended DTB is placed too early. On evb-ast2600 this produced: sizeof(spl/u-boot-spl-nodtb.bin) = 0xc92c _image_binary_end = 0xc930 SPL then looked four bytes past the FDT header and failed with: Missing DTB No serial driver found Move the 8-byte alignment into the preceding emitted __u_boot_list section so the objcopy output and _image_binary_end agree. Signed-off-by: Quentin Strydom <[email protected]> --- Changes in v2: - Replace the Makefile padding change with an AST2600 SPL linker script fix. - Move the 8-byte alignment into the emitted __u_boot_list section so spl/u-boot-spl-nodtb.bin and _image_binary_end agree. - This was reproduced and tested with QEMU ast2600-evb, not physical hardware. arch/arm/mach-aspeed/ast2600/u-boot-spl.lds | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds b/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds index 303ace2f61c..894eda1db77 100644 --- a/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds +++ b/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds @@ -42,6 +42,7 @@ SECTIONS . = ALIGN(4); __u_boot_list : { KEEP(*(SORT(__u_boot_list*))); + . = ALIGN(8); } > .nor . = ALIGN(4); @@ -49,7 +50,6 @@ SECTIONS __binman_sym_start = .; KEEP(*(SORT(.binman_sym*))); __binman_sym_end = .; - . = ALIGN(8); } > .nor /* -- 2.43.0
