May 2000 - OpenBIOS - mail.coreboot.org

OT: linux kernel problem
by Edwin Rhodes July 17, 2000

July 17, 2000

when compiling my linux kernel i keep on recieving this message: Warning: Clock Skew Detected Build May Be Incomplete It seams to compile ok. What does this error message mean?? and how can i fix it. thanks edwin ps. I have only been getting this message since i upgraded to an AMD K6-2 500Mhz.

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Current States of LinuxBios on SiS 630
by Ollie Lho June 3, 2000

June 3, 2000

Ron, We can boot the kernel from power-on now. With the romimage which will be sent to you seperately, we can reach the point of kernel_thread(init,...); in arch/i386/kernel/setup.c which means that everything is ready and we are going to load/execute scripts in rc.d. We are using kernel-2.3.99pre5 with the patch in export.tgz. If you can monitor port 0x80 with debug card you can get 0xed at the end. We don't experience the keyboard problem you described, does that happen after the kernel_thread() ?? After initrc are executed ?? The frame buffer device driver is included in 2.4.0-test1 and later kernel. There is some bug in Config.in which makes the option absent when make config, but it is really easy to fix. I think we should move to 2.4.0 now since we are going to need fbdev real soon. Finally, could you please put your source to the FreeBIOS CVS ?? Usually we are unsure if our version matches yours, you know, things like this make a lot of trouble. BTW, we are asking VGA BIOS group to release more information/source code. I hope we can turn on the monitor ASAP, using ICE and debug card is really a pain in the ass. P.S. Jeff, could you review the sisfb for us ?? What are we missing from the driver for this special purpose ?? Ollie - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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SiS 630 booting Linux from power on.
by Ronald G Minnich May 31, 2000

May 31, 2000

We're not up to multiuser, because we have a keyboard hang problem. But we think we'll get that soon. Getting there! ron - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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question for the experts on PII vs. Celeron startup
by Ronald G Minnich May 25, 2000

May 25, 2000

I have been having trouble getting PII to work with memory from powerup. I just now realized that I'm seeing basically the same problem on the Intel and SiS motherboards. Engineers at SiS, using the same linuxbios romimage as I am using, has no troubles on the motherboard BUT: they are using Celeron. (see the linuxbios web page: I can still get the intel motherboard up with linuxbios, but I have to let the flash recovery code run first by twiddling the jumper). The symptom is that during memory init, at some point the processor seems to take a trap during a memory write. It is as though some piece of hardware between the processor and memory is unhappy :-) I'm working with SiS to try a different motherboard. But: I'm now wondering if I'm encountering some kind of PII L2 Cache init problem on the Slot 1 cards I'm using here. I'm very suspicious that I'm seeing a particular kind of problem on my Slot 1 PII systems that SiS is not seeing using a Celeron, and that I'm seeing the same kind of problem on both Intel and SiS mainboards. Any comments on this? Any thoughts? Anyone know if anything special happens for L2 cache on a Slot 1 card at powerup? It would probably look like an IN or OUT to an undocumented address (undocumented since this is Intel we're talking about here). ron p.s. linuxbios: http://www.acl.lanl.gov/linuxbios - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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Programming ROMS
by Edwin Rhodes May 24, 2000

May 24, 2000

Hi, I've managed to obtain some 486 and 386 ROM's that I would like to program. I would like to replace the current ROM code with that of the linux bios code. unfortunately I don't think that the boards support flash update?? how do I go about re-programming them??? what hardware and software is required to re-write the bios?? would I be able to get away with a hot-swap??? or do i need a proper rom programmer, if so which one would you recommend. thanks, Edwin ps. well done for getting so far with linux bios. if there is anything I can do to help let me know. :)

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RE: [OpenBIOS] Programming ROMS
by Jessen, Per May 24, 2000

May 24, 2000

> -----Original Message----- > From: Edwin Rhodes [mailto:edwin_rhodes@hotmail.com] > Sent: 24 May 2000 15:18 > To: openbios(a)elvis.informatik.uni-freiburg.de > Subject: [OpenBIOS] Programming ROMS > > > Hi, I've managed to obtain some 486 and 386 ROM's that I > would like to program. I would like to replace the current > ROM code with that of the linux bios code. unfortunately I > don't think that the boards support flash update?? how do I > go about re-programming them??? what hardware and software is Assuming they are indeed EPROMs, you need to determine the type of EPROM (make, code - e.g. AMD27Cxxxx and so on). Retrieve the datasheet from the manufacturers website, then determine how to program them. > required to re-write the bios?? would I be able to get away > with a hot-swap??? or do i need a proper rom programmer, if > so which one would you recommend. If the EPROMs are not flashable, simply go for a burner that supports the type of chip(s) you have. I'm not sure what you mean by 'hot-swap' ? regards, Per Jessen - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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Programming ROMS
by Edwin Rhodes May 24, 2000

May 24, 2000

Hi, I've managed to obtain some 486 and 386 ROM's that I would like to program. I would like to replace the current ROM code with that of the linux bios code. unfortunately I don't think that the boards support flash update?? how do I go about re-programming them??? what hardware and software is required to re-write the bios?? would I be able to get away with a hot-swap??? or do i need a proper rom programmer, if so which one would you recommend. thanks, Edwin ps. well done for getting so far with linux bios. if there is anything I can do to help let me know. :)

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Mixing 16 and 32 bits code
by Ollie Lho May 22, 2000

May 22, 2000

Ronald, It seems that you made some mistake in mixing 16 and 32 bits code in the intel_start32.S: _realstart: cli movw %cs, %eax movw %eax, %es xor %eax, %eax mov %eax, %cr3 /* Invalidate TLB*/ .byte 0x66 /* prefix */ .byte 0x26 .byte 0x0f, 0x01, 0x16 /* lgdt [es:offset]*/ .word 0x02 /* offset in segment */ movl %cr0, %eax andl $0x7FFAFFD1, %eax /* PG,AM,WP,NE,TS,EM,MP = 0*/ orl $1, %eax movl %eax, %cr0 data32 ljmp $0x10, $.Lprotected Before _realstart there was a .code16 directive, so it should be in 16 bits mode, so how could those 32 bits (long) operation works ?? This bugs seems breaks gas 2.9.5 also. Ollie - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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latest snapshot
by Ronald G Minnich May 8, 2000

May 8, 2000

The latest snapshot of the linuxbios is at http://www.acl.lanl.gov/linuxbios. This is the one that boots multiuser. I included a linux/.config so you have our config. It also includes romimages (I didn't do a make clean, in other words ...) problems to me. We're starting an alpha port next week sometime. ron - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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linuxbios: I can now login
by Ronald G Minnich May 5, 2000

May 5, 2000

Just got the keyboard working, thanks to a few hints from the openbios guys. So I can now log in. You can hit reset on the box, and before you know it you're seeing linux boot messages ... still lots to do, but this is a big step. Logging in is always a good idea :-) One cool thing: I still have not had to reproduce the "steenking bios" code from boot/setup.S. Linux is handling most hardware init tasks just fine. ron - To unsubscribe: send mail to majordomo(a)freiburg.linux.de with 'unsubscribe openbios' in the body of the message

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