On Sat, Mar 25, 2017, 00:40 Andrei Borzenkov <arvidj...@gmail.com> wrote:
> 25.03.2017 10:22, Vladimir 'phcoder' Serbinenko пишет: > > On Sat, Mar 25, 2017, 00:16 Andrei Borzenkov <arvidj...@gmail.com> > wrote: > > > >> 24.03.2017 21:38, Gailu Singh пишет: > >>> This is how it is calculated in coreboot > >>> > >>> > >> > https://review.coreboot.org:4430/cgit/coreboot.git/tree/src/lib/cbfs.c?id=refs/heads/master#n268 > >>> > >>> ___FMAP__COREBOOT_BASE and ___FMAP__COREBOOT_SIZE are based on values > >>> available in fmd files (depending on 8MB/16Mb coreboot). > >>> > >>> > >>> #grep -r FMAP__COREBOOT_BASE src/lib/cbfs.c: size_t fmap_top = > >>> ___FMAP__COREBOOT_BASE + ___FMAP__COREBOOT_SIZE; > >>> build/fmap_config.h:#define ___FMAP__COREBOOT_BASE 0x300800 > >>> > >>> #grep -r FMAP__COREBOOT_SIZE > >>> src/soc/intel/baytrail/romstage/cache_as_ram.inc:#define > CODE_CACHE_SIZE > >>> _ALIGN_UP_POW2(___FMAP__COREBOOT_SIZE) > >>> src/lib/cbfs.c: size_t fmap_top = ___FMAP__COREBOOT_BASE + > >>> ___FMAP__COREBOOT_SIZE; > >>> build/fmap_config.h:#define ___FMAP__COREBOOT_SIZE 0xc1d800 > >>> > >>> #cat src/mainboard/intel/leafhill/leafhill.16384.fmd > >>> FLASH 16M { > >>> SI_DESC@0x0 0x1000 > >>> IFWI@0x1000 0x2ff000 > >>> FMAP@0x300000 0x800 > >>> COREBOOT(CBFS)@0x300800 0xc1d800 > >>> UNIFIED_MRC_CACHE@0xf1e000 0x21000 { > >>> RECOVERY_MRC_CACHE@0x0 0x10000 > >>> RW_MRC_CACHE@0x10000 0x10000 > >>> RW_VAR_MRC_CACHE@0x20000 0x1000 > >>> } > >>> BIOS_UNUSABLE@0xf3f000 0x40000 > >>> DEVICE_EXTENSION@0xf7f000 0x7f000 > >>> UNUSED_HOLE@0xfff000 0x1000 > >>> } > >>> > >>> > >> > >> How does it help us? We have no idea which board grub currently runs on. > >> Do you suggest scanning the whole memory for "__FMAP__" signature? > >> > > I think it ends up at constant offset from the end of ROM > > > > But we do not know the end of ROM in general case, that is the problem. > ROM is an overloaded term in this case. I mean the whole ROM, not just the BIOS section that contains coreboot and cbfs > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel >
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