On Fri, 2018-03-02 at 14:48 +0200, Kari Tanninen wrote: > "In Debian installer, for the various plug devices, we append to > the DTB at the end of the kernel rather than loading it separately." > > > Is that possible/reasonable? > > U-boot have to link all files on boot and it is impossibe to append > command line parametres to fdt-blob > without resize fdt-blob at U-boot. U-boot is using physical addressing > only(?) and I think kernel cannot > resize itself before boot without relocation problems -> bootm_size > variable issue. > > If fdt is used, kernel should discard ATAG-variables by default, I > think. [...]
This behaviour is configurable. For armel and armhf we enable CONFIG_ARM_ATAG_DTB_COMPAT and CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER so that ATAG variables override the DTB. Ben. -- Ben Hutchings [W]e found...that it wasn't as easy to get programs right as we had thought. ... I realized that a large part of my life from then on was going to be spent in finding mistakes in my own programs. - Maurice Wilkes, 1949
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