it's pretty sure the coreboot support k8... On Tue, Jun 29, 2010 at 4:26 AM, Andrew <[email protected]> wrote:
> Hi all. > > I experimented with K10+ CPUs and boards that doesn't support them, and on > some boards it's possible to start new CPUs with BIOS from board on same (or > closely relative, like GeForce7025/NForce520 pair) chipset - possible with > some bugs, possible without all working fuctions, or even sysnem that hangs > on late BIOS initialisation stages - but CPU is successfully initialized. > Also there are many enough old AM2 boards, that have AM2+/AM3 CPU support. > So incompatibility of new CPUs with old hardware is only on software level > (or 'semi-hardware' - when there aren't enough place in flash to fit new > K10-related modules and microcodes). > > I looked to coreboot because it looks like it can be enough functional > replacement of native BIOS. And I want to try to make some experiments with > it. > > I have some MBs for experiments (Asus M2V-MX, Biostar GeForce7025, Palit > NForce520 - that is AM2+/AM3 CPU compatible, MSI K9N4 Ultra MS-7310, and > some Biostar on K8T800 - but as I understand this bridge can't be correctly > initialized by coreboot). GeForce7025 and NForce520 boards have compatible > BIOS - at least, after swapping of flashes they can successfully load MS-DOS > from USB flash, and work with PCI/PCI-E videocards - so it looks that they > use reference design. Also I have Willem programmer (still without PLCC > parallel flash adapter because it was unneeded for me for many years - but > I'll make it soon) and POST card, some knowledge in PC hardware and > programming, and sometimes have some free time that I can spent for such > experiments. > > After look at code I have some questions: > 1) Coreboot image that is assembled for K10, will support K8 CPUs? And how > about K10.5 AthlonII/PhenomII CPUs (generic AM2+ boards can successfully run > AM3 CPUs)? > 2) To change CPU family - it's enough to replace family in Kconfig and > replace included files in romstage.c? > 3) Why you don't use generic AMD memory routines and CPUID detection for > CPU family at initialization, and possible conditional compiling of code if > somebody will need to disable support of K8 or K10+ - for ex., for flash > space saving? > 4) And what I need for try to create bios for unsupported MB if I take one > working as basic? Except modifying Kconfig, replacing DSDT and, of course, > replacing MB model name? How can I obtain data for devicetree.cb? I must > edit irq_tables.c and mptable.c if I try to adapt BIOS from MB with same > chipset? And how about cmos.layout? > > > -- > coreboot mailing list: [email protected] > http://www.coreboot.org/mailman/listinfo/coreboot > -- Wang Qing Pei MSN:[email protected] <msn%[email protected]> Gmail:[email protected] <gmail%[email protected]> Phone:86+13426369984
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