ok, looks like 0x27051956 is uboot magic number (from start.S) why is the CFG_MONITOR_BASE points to the magic number ?
--- On Tue, 7/22/08, Fundu <[EMAIL PROTECTED]> wrote: > From: Fundu <[EMAIL PROTECTED]> > Subject: [U-Boot-Users] u-boot.bin > To: u-boot-users@lists.sourceforge.net > Date: Tuesday, July 22, 2008, 3:44 PM > i'm working on taishan ppc440gx. > > now here's what i noticed. snippet of u-boot.bin opened > with a hex editor. > > > fffbffff : 27051956 552d426f 6f742031 2e322e30 > '..VU-Boot 1.2.0 > fffc000f : 20284a75 6c203232 20323030 38202d20 (Jul 22 > 2008 - > fffc001f : 31343a31 363a3037 29000000 00000000 > 14:16:07)....... > fffc002f : 00000000 00000000 00000000 00000000 > ................ > fffc003f : 00000000 00000000 00000000 00000000 > ................ > > and my u-boot.map > > .text 0xfffc0000 0x2aa9c > cpu/ppc4xx/start.o(.text) > .text 0xfffc0000 0x2704 cpu/ppc4xx/start.o > 0xfffc01bc _start_of_vectors > 0xfffc0004 version_string > 0xfffc2424 dcache_enable > 0xfffc24dc relocate_code > 0xfffc24b4 in32 > 0xfffc24ac in16r > 0xfffc2474 in8 > 0xfffc24bc in32r > 0xfffc2484 out16 > 0xfffc24a4 in16 > 0xfffc23ec icache_enable > 0xfffc246c wr_tcr > 0xfffc2100 > transfer_to_handler > 0xfffc24cc ppcDcbi > 0xfffc0100 _start > > couple of question. > 1) this line ".text 0xfffc0000 > 0x2aa9c" from u-boot.map > which means .text starts at 0xfffc0000 and with length of > 0x2aa9c. right ? > > then looking at the hex dump of u-boot.bin looks like > there's some data right after first word (U-Boot > 1.2.0...) > what am i missing ? > > 2) when ppc440gx reset it has 0xfffffffc in its program > counter, the instr at this location is a branch instr. > right ? > b) this branch should go to TEXT_BASE which is 0xfffc0000 > in my case. > and that location contains 0x05195655. which looks like a > "rlwimix" instr. (rotate left word immediate then > mask insert). does this look start of monitor ? > > Any insight on how the bootldr starts up would be > appreciated too. > thanks ! > > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move > Developer's challenge > Build the coolest Linux based applications with Moblin SDK > & win great prizes > Grand prize is a trip for two to an Open Source event > anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > U-Boot-Users mailing list > U-Boot-Users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/u-boot-users ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
