Hi Arseniy, avkrasnov@xxxxxxxxxxxxxxxxx wrote on Tue, 7 May 2024 09:53:06 +0300: > On 06.05.2024 16:48, Miquel Raynal wrote: > > Hi Arseniy, > > > > avkrasnov@xxxxxxxxxxxxxxxxx wrote on Tue, 16 Apr 2024 11:51:00 +0300: > > > >> Boot ROM code on Meson requires that some pages on NAND must be written > >> in special mode: "short" ECC mode where each block is 384 bytes and > >> scrambling mode is on. > > > > Ok > > > >> Such pages located with the specified interval within specified offset. > > > > I'm sorry I don't get that sentence. > > Sorry, I mean this (let me draw :) ) : > > [ page 0 ][ page 1 ][ page 2 ][ page 3 ][ page 4 ][ page 5 ][ page 6 ][ page 7 ][ page 8 ][ page 9 ] > > For example, we have 10 pages starting from the beginning of the chip - this is "within specified offset", > e.g. offset is 10. BootROM on axg needs that (for example) every third page must be written in "special" > mode: scrambling is on and ECC is 384 bytes. Such pages are 0, 2, 4, 6, 8. E.g. "specified interval" will > be 3. Shall be 2, no? > > So: > > amlogic,boot-pages: 10 > amlogic,boot-page-step: 3 Ok I get it. Thanks for the explanation. I don't really understand the logic behind it though. Do you know why the bootROM would access only one page over 2 or 3? Is there a default value? Is this configurable? Thanks, Miquèl
