Hi Joe, On 10 August 2016 at 10:43, Joe Desbonnet <jdesbon...@gmail.com> wrote: > > I've been trying to implement vboot from SPI flash on the BeagleBone Black > with only limited success. I'm working with u-boot 2016.07 and using the > instructions in beaglebone_vboot.txt (in doc directory). > > So far: I've had no problem booting regular u-boot from SPI flash. I build > with am335x_boneblack_defconfig with minor modifications: added SPI_BOOT > to the list of items on CONFIG_SYS_EXTRA_OPTIONS and added > CONFIG_SPI_FLASH_STMICRO=y to enable support for my SPI flash chip > (M25P16). The I use the following command sequence from the u-boot command > line to program the flash: > > sf probe 0 > sf erase 0 +80000 > mmc rescan > fatload mmc 0 ${loadaddr} MLO.byteswap > sf write ${loadaddr} 0 ${filesize} > fatload mmc 0 ${loadaddr} u-boot.img > sf write ${loadaddr} 0x20000 ${filesize} > > And this works nicely. > > I also have had success with vboot enabled u-boot using > the beaglebone_vboot.txt instructions and booting from SD card. > > *BUT* > > when I copy MLO(.byteswap) and u-boot.img that works successfully on SD > card to SPI flash it fails to get past the Second Phase Loader: > > U-Boot SPL 2016.07 (Aug 10 2016 - 16:06:39) > Trying to boot from SPI > > U-Boot SPL 2016.07 (Aug 10 2016 - 16:06:39) > Trying to boot from SPI > > ... etc for ever > > On an oscilloscope I can see what I'm sure is the SPL trying to loading > u-boot.img on the SPI bus. But it never gets as far as executing it. > > So in summary, I've got SPI boot working and vboot working but I cannot > seem to combine both. > > Any ideas what I'm doing wrong?
Not really, but if you look at spl_spi_load_image() you could add some debugging or #define DEBUG at the top of the file. Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot