Hi,
I'm playing with fdt booting on beaglebone board. I'm using latest u-boot git HEAD (2c072c958bb544c72f0e848375803dbd6971f022) + I've added to am335x_evm confing : #ifndef CONFIG_SPL_BUILD #define CONFIG_OF_CONTROL #define CONFIG_OF_SEPARATE #endif
I took beaglebone devicetree from kernel. Then I took patch [1] to build image from u-boot and my compiled DT blob.
Booting this image always fails with: No valid FDT found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb> ** CONFIG_OF_CONTROL defined but no FDT - please see doc/README.fdt-control
I poke around this and find out that when CONFIG_OF_SEPARATE is used then fdt_blob is set to address of .__end pointer. When evaluate image with hexdump it seems that fdt blob (in my particular case and configuration) is shifted by 312 bytes from .__end. When I point gd->fdt_blob (hack in code) to that address it boots fine. Any ideas what I'm doing wrong (I must do something wrong as it seems nobody complains :)).
[1] - http://git.denx.de/?p=u-boot/u-boot-x86.git;a=commit;h=d4ab2022cdfe098e93819...
BR,
marek