Am 25.01.2017 um 21:21 schrieb Marek Vasut: > On 01/25/2017 06:33 PM, Dalon Westergreen wrote: >> On Wed, 2017-01-25 at 08:39 -0600, Dinh Nguyen wrote: >>> >>> On 01/25/2017 03:48 AM, Marek Vasut wrote: >>>> >>>> On 01/25/2017 05:13 AM, Dalon Westergreen wrote: >>>>> >>>>> From: Dalon Westergreen <[email protected]> >>>>> >>>>> These patches update the boot and os partition numbers in >>>>> the >>>>> default uboot environment for a number of socfpga >>>>> boards. Per >>>>> request, common environment configurations have been moved to >>>>> a >>>>> shared >>>>> header. >>>> >>>> OK, waiting for Acks from Dinh, just to be sure. >>>> >>>> btw a nit, please fill the $subject of cover letter next time. >>>> >>>> >> I was just informed of an issue with moving the fat/boot partition >> to p2. Windows no longer mounts the fat partition. I'm not sure >> who or why CONFIG_SYS_MMCSD_FS_BOOT_PARTITION was changed to 2 >> but i think in order to allow windows to mount the fat partition >> it will need to be the first partition. So i am going to change >> CONFIG_SYS_MMCSD_FS_BOOT_PARTITION back to 1, and change the >> default env variables appropriately. > > You mean the layout is now: > - p1 0x83 > - p2 0xa2 > - ... > > I think this is really flaky, but I heard somewhere on the list that it > is possible to write the u-boot-spl-with-dtb.sfp (without having actual > 0xa2 partition) to offset 64 kiB and the machine will still boot. I am > starting to consider using this approach as it will also allow distro > bootcmd to work and distros to integrate altera boards. >
Yes, when #define CONFIG_SPL_ABORT_ON_RAW_IMAGE is set then the SPL will search for an u-boot image at the CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR location on the MMC after a failed scan for a 0xa2 partition. So with that option the uboot image can be installed on the MMC by dd if=u-boot-with-spl.sfp of=<disk> bs=64k seek=1 skip=1 With that the first 64KiB of the MMC are untouched, MBR/GPT for the OS is preserved, and u-boot can start without 0xa2 partition. Br, Frank _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
