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. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
