coreboot July 2003

coreboot@coreboot.org

67 participants
150 discussions

Flash memory?
by John Praveen 24 Jul '03

24 Jul '03

Hi I read the document www.linux-magazine.com/issue/28/LinuxBIOS.pdf. It states that DiskOnChip is required for the linuxBIOS. The How-to doc in linuxbios tree too is based on building it for DiskOnChip. Thats what i was confused whether my Flash device would be supported or not? __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com

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SC1200-BLDT (fwd)
by ron minnich 24 Jul '03

24 Jul '03

anybody? ron ---------- Forwarded message ---------- Date: Wed, 23 Jul 2003 03:12:33 +0000 From: Devi Priya <ijpriya(a)hotmail.com> To: rminnich(a)lanl.gov Subject: SC1200-BLDT Hello I have compiled the linuxbios for sc1200. I also have Dorado xpress loader. Can you plz tell how could I boot my linux OS from Flash into RAM using the BLDT from National? I assume the BLDT is for WindowsCE OS. I assume like this. I can have the (lilo) bootloader as the option ROM. So my BIOS program shall scan for the option ROMs. Is it correct? _________________________________________________________________ It's all happening @ F1. Feel the thrill! http://server1.msn.co.in/sp03/formula2003/index.asp Race along right here!

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about a serial port.....
by gimyung han 24 Jul '03

24 Jul '03

I finally succeeded in burning linuxbois on rom, however, how can i see if i succeed or not? On the HOWTO I should connect linuxbios computer with serial port..... where should I connect it? can anybody explain about it? thanks for any helps _________________________________________________________________ 증권 정보 가장 빠르고 편하게 보실 수 있습니다. MSN 증권/투자 http://www.msn.co.kr/stock/

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supermicro p4dc6p complier problem
by Tien 24 Jul '03

24 Jul '03

Hi guys, Does anyone can complier supermicro P4DC6P with latest version source code? Pls let me know how to do it if anyone know it. Best regards, Tien

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Re:Loading OS from Flash ROM!
by John Praveen 24 Jul '03

24 Jul '03

On Fri, 18 Jul 2003, John Praveen wrote: > I am new to linux bios. My project is based on > geode chip. I want my linux OS to be in Flash ROM(capacity 4 MB). >I have sad news. You can't get a 4 MB chip on that board, I bet. I can't get to this. This means that 4 MB Flash ROM cannot be used with SC1200? Or is it not supported in LinuxBIOS. Plz help me to understand these. >It is >probably 4 Mbits, 512 KB. You'll have to put that overweight linux kernel >on a diet to get it to fit in there. >One option is 2.4.0 or so, that might fit. >Can DoC fit on your geode anywhere? No I don't use DiskOnChip. Thanks. --------------------------------- Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month!

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irq routing on TigerMPX.
by Oleg Gusev 24 Jul '03

24 Jul '03

It seems that linuxbios (and linux) uses the irq routing tables dumped from the bios mptable. Are there any good reasons to reroute 9 pci/agp interrupts (2 64-bit slots on the first pci bus + 1 agp + 4 32-bit slots + builtin ethernet on the second pci bus) to 4 apic pins 16,17,18,19 when at least the pins 5,9,10,11 are not used at all ? Now i have 3 devices sharing pin 19, and 2 devices on 16,17 and 18. Is this the intended use of io-apic ? Oleg.

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DoC again
by Martin Schmachtel 23 Jul '03

23 Jul '03

These may sound like stupid questions to you, but please bear with me, I'm new to this stuff and have not found anything definitive on google about it. M-Systems apparently no longer produces the Disk-on-chip millenium with the part number MD-2800-D08. The successor MD-2802-D08 is supposed to be compatible , but I'd like to be a little more certain about it. Has anybody used the new chips with linuxbios successfully? Can any bios chip (in DIP-32 package) be replaced by a DoC? Or are there any requirements not all boards fullfil, like not all needed address lines are connected? More specifically, I'd like to try to get linuxbios working on my Asus P2B, which I hope will not be too difficult since some support for 440BX seems already present. ciaole schmadde

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OT: job offer
by Franz Reinhardt 23 Jul '03

23 Jul '03

wenglor sensoric gmbh sucht: PC-HW/SW-Entwickler (Ingenieur/Techniker mit Berufserfahrung) zur Schaltungsentwicklung und Treiberprogrammierung. Anforderung: Fundierte Kenntnisse in der PC-Architektur Aufgabengebiet: Entwicklung von PC-basierten Hauptplatinen Schaltungen in der PC-Peripherie (z.B. PCI-Bus) Mit über 300 Mitarbeitern sind wir in Deutschland die Nr. 2 im Bereich der optischen Sensorik. Informationen zur Firma und unserer Produktpalette entnehmen sie bitte unserer Homepage http://www.wenglor.de Weitere Informationen zu diesem Stellenangebot erhalten sie per Email: fre(a)wenglor.de oder telefonisch: +49 (0)7542-5399-421 -- ----wenglor(R)----sensors for your success----------

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TigerMPX and s2466.
by Oleg Gusev 23 Jul '03

23 Jul '03

Is there any difference between these two mainboards, other than s2466-4M having 4Mbit flash ROM? I would like to test linuxbios, but it is not obvious which one to take. Oleg.

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freebios2 mod to reset code.
by ron minnich 23 Jul '03

23 Jul '03

Now that we are using romcc, and all functions are inline, it is getting increasingly painful to deal with linuxbios images smaller than 64k. This problem happens as we need a 16-bit jump to the start of the linuxbios code, which limits us to jumping to 0xffff0000. But if linuxbios is bigger than that, we need to be able to jmp to 0xfffe0000, which is not possible with the current setup. We can grow this if we do the following: make reset a rel jump to 0xfffffff0 - (sizeof entry16). Then put entry 16 right before 0xfffffff0. Entry16 code turns on 32-bit mode and then jumps to the real start of the linuxbios image -- which can now be anywhere in the flash image. I could use this now, as could others. here is sample code which I am trying. It now assembles and inspection of the object reveals that it is certainly close to correct. Here's where I wish I had a really good emulator for linux -- checking this out would be a whole lot easier. The test reset16 code: .section .reset .code16 .globl rgdtptr16 .globl reset_start .type reset_start, @function reset_start: cli xorl %eax, %eax movl %eax, %cr3 /* Invalidate TLB*/ invd movw %cs, %ax shlw $4, %ax movw $gdtptr16_offset, %bx subw %ax, %bx data32 lgdt %cs:(%bx) movl %cr0, %eax andl $0x7FFAFFD1, %eax /* PG,AM,WP,NE,TS,EM,MP = 0 */ orl $0x60000001, %eax /* CD, NW, PE = 1 */ movl %eax, %cr0 /* Now that we are in protected mode jump to a 32 bit code segment. */ data32 ljmp $ROM_CODE_SEG, $__protected_start /** The gdt has a 4 Gb code segment at 0x10, and a 4 GB data segment * at 0x18; these are Linux-compatible. */ .align 4 .globl rgdtptr16 rgdtptr16: .word gdt_end - gdt -1 /* compute the table limit */ .long gdt /* we know the offset */ .globl reset_vector .align 4 reset_vector: jmp reset_start The net effect is this: 16-bit reset jmps to a very small startup code right before 0xfffffff0 that enables full 32-bit mode. We can then jmp anywhere we want -- to 0xfffe0000 for example -- which we can't do now. This will alleviate the problem of linuxbios images growing to > 64K which is a consequence of romcc right now. This will allow us to live with really big linuxbios images until romcc makes tighter code. Comments? Errors in the code? thanks ron

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coreboot July 2003