Theoretically - yes, if someone finds & solders there a 32 MB (256 megabit) SPI Flash chip with 8 pins. Hopefully, as the proprietary UEFIs become more & more bloated, these large capacity chips will become more widely available in the near future. And, since a coreboot itself consumes less than 1MB on these "opensource AGESA" AMD systems such as G505S and A88XM-E, all this room will allow some very interesting experiments! If even 3 MB is enough for me to put 9 of 10 floppies of the collection described here (thanks to LZMA compression) - http://dangerousprototypes.com/docs/Lenovo_G505S_hacking#Useful_floppies , guess what wonders we can do with 31 MB... ;-)
On Mon, Feb 19, 2024 at 7:17 PM ron minnich <[email protected]> wrote: > > Can the system you are discussing actually use larger than 16 MB rom? > > I am wondering about your use of the phrase “out of curiosity” > > On Mon, Feb 19, 2024 at 07:05 Mike Banon <[email protected]> wrote: >> >> Small bump, I am still having this error while (out of curiosity) >> trying to build the Lenovo G505S ROM for 32 MB or 64 MB spi flash: >> >> OBJCOPY bootblock.raw.bin >> Created CBFS (capacity = 33488356 bytes) >> BOOTBLOCK >> CBFS cbfs_master_header >> CBFS fallback/romstage >> Image SIZE 33554432 >> cbfstool: >> /media/mint/2183183a-158f-476a-81af-b42534a68706/shared/core/coreboot/util/cbfstool/cbfstool.c:1186: >> cbfstool_convert_mkstage: Assertion >> `IS_HOST_SPACE_ADDRESS(host_space_address)' failed. >> Aborted (core dumped) >> make: *** [Makefile.mk:1210: build/coreboot.pre] Error 134 >> >> Meanwhile, it builds fine for 4 MB / 8 MB / 16 MB , only these large >> sizes are a problem >> >> On Sat, Jun 25, 2022 at 12:55 AM Julius Werner <[email protected]> wrote: >> > >> > I can see a little bug that makes this return a confusing error (it >> > should have really failed with `SPI flash address(0x300) not in any >> > mmap window!`), and we can fix that if you want. But that still won't >> > make this build (and my patch didn't cause the underlying problem, >> > before that it may have built an image but it probably wouldn't have >> > booted). By default cbfstool only expects the top 16MB of the flash to >> > be memory-mapped, so it cannot link XIP stages into areas outside of >> > that. The real solution is to either change your FMAP to put the >> > COREBOOT section into the top 16MB (we might want to change the >> > auto-generated default FMAP to do that), or pass >> > --ext-win-base/--ext-win-size options to cbfstool to tell it how to >> > map areas below the top 16MB. >> > >> > On Thu, Jun 23, 2022 at 1:09 AM Paul Menzel <[email protected]> wrote: >> > > >> > > Dear Mike, >> > > >> > > >> > > Am 23.06.22 um 09:49 schrieb Mike Banon: >> > > > If I use a default config for i440fx/piix4, building a 16MB ROM works >> > > > fine, but 32MB or 64MB doesn't work anymore: >> > > > >> > > > ... >> > > > CC postcar/southbridge/intel/common/rtc.o >> > > > LINK cbfs/fallback/postcar.debug >> > > > OBJCOPY cbfs/fallback/romstage.elf >> > > > CREATE >> > > > build/mainboard/emulation/qemu-i440fx/cbfs-file.vqaXlP.out (from >> > > > /home/my_custom_path_to/coreboot/.config) >> > > > CC+STRIP src/lib/cbfs_master_header.c >> > > > OBJCOPY cbfs/fallback/bootblock.elf >> > > > OBJCOPY bootblock.raw.elf >> > > > OBJCOPY bootblock.raw.bin >> > > > Created CBFS (capacity = 33553892 bytes) >> > > > BOOTBLOCK >> > > > CBFS cbfs_master_header >> > > > CBFS fallback/romstage >> > > > cbfstool: >> > > > /home/my_custom_path_to/coreboot/util/cbfstool/cbfstool.c:1145: >> > > > cbfstool_convert_mkstage: Assertion >> > > > `IS_HOST_SPACE_ADDRESS(host_space_address)' failed. >> > > > make: *** [Makefile.inc:1116: build/coreboot.pre] Aborted >> > > >> > > Thank you for the report. It looks like a regression of commit >> > > 20ad36547e25 (cbfstool: Do host space address conversion earlier when >> > > adding files) [1]. >> > > >> > > Building a 32 MB ROM also fails for emulation/qemu-q35 >> > > (`CONFIG_BOARD_EMULATION_QEMU_X86_Q35=y`). >> > > >> > > >> > > Kind regards, >> > > >> > > Paul >> > > >> > > >> > > [1]: https://review.coreboot.org/c/coreboot/+/60018 >> > _______________________________________________ >> > coreboot mailing list -- [email protected] >> > To unsubscribe send an email to [email protected] >> >> >> >> -- >> Best regards, Mike Banon >> Open Source Community Manager of 3mdeb - https://3mdeb.com/ >> _______________________________________________ >> coreboot mailing list -- [email protected] >> To unsubscribe send an email to [email protected] -- Best regards, Mike Banon Open Source Community Manager of 3mdeb - https://3mdeb.com/ _______________________________________________ coreboot mailing list -- [email protected] To unsubscribe send an email to [email protected]
