> > I use the fallback and the normal mode, if my chip has a size 256*1024, >> what size of FALLBACK_SIZE and ROM_IMAGE_SIZE I can choose, I have some >> difficulty to define the role of the ROM_IMAGE_SIZE, the ROM_SIZE define >> the size of the chip, the FALLBACK_SIZE define the size of the fallback >> mode, but the ROM_IMAGE_SIZE ??? I don't understand the goal of >> ROM_IMAGE_SIZE, if you have an better explaination that on the Web site, >> I >> would appreciate much. >> > > Just to make sure first, after changing anything in the config'lb or > options.lb files, you have to re-run ./buildtarget to recreate the make > files with the new values. > > If I understand it right, this is pretty much how it works, and some > reasonable values for a 256k flash part: > > ROM_IMAGE_SIZE determines the amount of space for lb's fallback image to > take up, 64kb (64*1024, or 0x10000). The minimum size of this is > dependent on the code, I don't know how you'd find it out other than > trial-and-error, but there must be a way. > > FALLBACK_SIZE determines the space for the fallback lb image + the > payload for the "fallback.rom", 128kb (128*1024, or 0x20000). This means > 64kb for lb+64kb for the payload. This at minimum needs to be > (obviously) the size of your built code + the size of your payload. > Also, make sure your Options.lb contains "default HAVE_FALLBACK_BOOT=1". > > ROM_IMAGE_SIZE again determines the size for the normal image's code, 64kb > > ROM_SIZE determines the size of the whole chip, 256kb. LB then computes > ROM_SIZE - FALLBACK_SIZE to get the size for the "normal.rom", which is > the normal lb code + the payload again. > > At the end, lb merges the fallback.rom(128k) and normal.rom (128k) to > give you linuxbios.rom (256k). > > There are some other options, like PAYLOAD_SIZE and ROM_SECTION_SIZE, > these should be computed by your src/../Config.lb based on the other > values. If you still have problems, grab the config.lb's and options.lb > from the asus p2b and use the values in those, they build a 256k flash > part for me just fine. > > -Corey >
Thank's for all of your explaination, now have a better vision of the things, thanks again ;) regards Ccases -- linuxbios mailing list [email protected] http://www.linuxbios.org/mailman/listinfo/linuxbios
