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39712 discussions

02 Nov '04

MB Model? HT routing table? YH -----Original Message----- From: Stefan Reinauer [mailto:stepan@openbios.org] Sent: Tuesday, November 02, 2004 12:06 PM To: linuxbios(a)clustermatic.org Subject: Weird K8 output Hi, on a 4cpu K8 system I get the following output before the system hangs.. Is the machine drunk or are CPU1-3 just running away? LinuxBIOS-1.1.7.0-fallback Tue Nov 2 20:34:14 CET 2004 starting... setting up resource map....done. Enabling routing table for node 00 done. Enabling SMP settings setup_remote_node: done Renaming current temporary node to 01 done. anabling routing table for node 01 dConlee. tRiennamgin g mcutrrrenrt emporary node to 02 done. Enabling routing table for node 02 dConle.e mRernaiminngg c urmretntr tre porary node to 03 done. Enabling routing table for node 03 dColnee.a iz04n ngod esm itnirtiral ed. coherent_ht_finalize done PCI_DEV=(0,0x18,0) 0xb4=00030000 bus=00 id =74501022 bus=00 id =74601022 PCI_DEV=(0,0x19,0) 0xd4=000a0400 Stefan _______________________________________________ Linuxbios mailing list Linuxbios(a)clustermatic.org http://www.clustermatic.org/mailman/listinfo/linuxbios

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Re: Segments in pre-C and C part
by ebiederman＠lnxi.com 02 Nov '04

02 Nov '04

Li-Ta Lo <ollie(a)lanl.gov> writes: > Eric, > > Why we use two differenct segment lay out for pre-C and > C part ? For the code that runs from ram and the code that runs directly from the rom chip. > In entry32.inc it is 0x08 for code and 0x10 for data but > in c_start we use 0x10 for code and 0x18 for data. Good question but it is probably a decent thing that will keep up from making too many assumptions that they have the same gdt. I don't believe this is something that has changed recently. Eric

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Re: Interrupt Handling
by ebiederman＠lnxi.com 02 Nov '04

02 Nov '04

Li-Ta Lo <ollie(a)lanl.gov> writes: > Eric, > > Why there are two ways for interrupt handling in c_start.S There are two ways for hardware exception handling. Interrupts are not handled. And that is because on x86 exception handlers don't always give you an error code. > vec9: > pushl $0 /* error code */ > pushl $9 /* vector */ > jmp int_hand > > > vec10: > /* error code */ > pushl $10 /* vector */ > jmp int_hand > .word 0x9090 > > Vector 9 push the error code and vector but vector 10 only push the > vector number. > > BTW, are those handler actually used ? The idt is uninited. This hunk below initializes it. It seems to work out better to initialize the idt with code instead of data. /* Initialize the Interrupt Descriptor table */ leal _idt, %edi leal vec0, %ebx movl $(0x10 << 16), %eax /* cs selector */ 1: movw %bx, %ax movl %ebx, %edx movw $0x8E00, %dx /* Interrupt gate - dpl=0, present */ movl %eax, 0(%edi) movl %edx, 4(%edi) addl $6, %ebx addl $8, %edi cmpl $_idt_end, %edi jne 1b /* Load the Interrupt descriptor table */ lidt idtarg Eric

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Weird K8 output
by Stefan Reinauer 02 Nov '04

02 Nov '04

Hi, on a 4cpu K8 system I get the following output before the system hangs.. Is the machine drunk or are CPU1-3 just running away? LinuxBIOS-1.1.7.0-fallback Tue Nov 2 20:34:14 CET 2004 starting... setting up resource map....done. Enabling routing table for node 00 done. Enabling SMP settings setup_remote_node: done Renaming current temporary node to 01 done. anabling routing table for node 01 dConlee. tRiennamgin g mcutrrrenrt emporary node to 02 done. Enabling routing table for node 02 dConle.e mRernaiminngg c urmretntr tre porary node to 03 done. Enabling routing table for node 03 dColnee.a iz04n ngod esm itnirtiral ed. coherent_ht_finalize done PCI_DEV=(0,0x18,0) 0xb4=00030000 bus=00 id =74501022 bus=00 id =74601022 PCI_DEV=(0,0x19,0) 0xd4=000a0400 Stefan

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Re: Removing .name field
by ebiederman＠lnxi.com 02 Nov '04

02 Nov '04

Li-Ta Lo <ollie(a)lanl.gov> writes: > Eric, > > Since you relaxed the 64kB limit. Why you still removed the .name field? > We really want the field back in for debugging purpose. No one has shown me a use or an example of a use. I have simply heard that the name field is a good thing. Show me how it would be used and I don't have a problem with not removing it. As it simply looks totally like dead code to me. In addition while I have relaxed the 64KiB limit I still want to watch the code size. Eric

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linuxbios external api
by Jeremy Jackson 02 Nov '04

02 Nov '04

Maybe this has been asked before, but i've been thinking about exporting functions like serial console, debugger entry points, etc. the PC BIOS uses the interrupt vectors as, well, vectors. I remember the C=64 had a jump table at a fixed address. I was wondering how hard it would be to use an ELF symbol table as a jump table, or at least as the source of information to build one. -- Jeremy Jackson Coplanar Networks (519)897-1516 http://www.coplanar.net

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Status Report 2004-11-02
by Stefan Reinauer 02 Nov '04

02 Nov '04

Hi, after some more changes like the removed 64k limit for linuxbios rom images here a new status report about the current image builds. NOTE: Many boards are broken at the moment. If anyone here can supply fixes, please do so. The situation is almost fatal given that the changes to do are mostly time consuming but not really complex. As a generic goal we should work on reducing the impact of such changes by adapting the structure. Example: Having a per board fallback mechanism seems overkill.. The only difference among all boards seem to be the included files from the north bridge and southbridge directories. These could easily be autogenerated from the config tool. The less files one port has, the easier it is to adapt to new changes. Long term this raises code quality and the number of new ports. Stefan

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option tables
by Stefan Reinauer 02 Nov '04

02 Nov '04

Hi, what's the right method of disabling build with an option table? Setting HAVE_OPTION_TABLE to 0 fails in src/include/pc80/mc146818rtc.h It's possible to change both HAVE_OPTIONS_TABLE and USE_OPTION_TABLE, but the logic is a bit weird. Stefan

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RE: Status Report 2004-11-02
by YhLu 02 Nov '04

02 Nov '04

I have fixed my parts. Regards YH -----Original Message----- From: Stefan Reinauer [mailto:stepan@openbios.org] Sent: Tuesday, November 02, 2004 4:14 AM To: linuxbios(a)clustermatic.org Subject: Status Report 2004-11-02 Hi, after some more changes like the removed 64k limit for linuxbios rom images here a new status report about the current image builds. NOTE: Many boards are broken at the moment. If anyone here can supply fixes, please do so. The situation is almost fatal given that the changes to do are mostly time consuming but not really complex. As a generic goal we should work on reducing the impact of such changes by adapting the structure. Example: Having a per board fallback mechanism seems overkill.. The only difference among all boards seem to be the included files from the north bridge and southbridge directories. These could easily be autogenerated from the config tool. The less files one port has, the easier it is to adapt to new changes. Long term this raises code quality and the number of new ports. Stefan

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testing and researching
by Jakob Praher 02 Nov '04

02 Nov '04

hi all, I'd like to do some embedded systems and cluster research and would like to use linuxbios as the building block. Has anybody tried to use linuxbios as the bios in a vm like bochs or vmware, so that one can "play" with linuxbios in software only? Additionally I'd like to know, whether you prefere the LinuxBiosKernel (I mean that there is no "real" linux kernel in the bios) over the LinuxKernel in Bios approach. If you are using LinuxBiosKernel are you using a standard ATA flash disk, or are there better ways to boot the LinuxKernel..... I'd also apprechiate a good and cheap hardware configuration, that works with linuxbios, especially: * in todays boards: is the flash bios big enough for the LinuxBiosKernel * if not, which flash chips would you prefer? * what board would you choose for clustering testing purposes (it should have state of the art peripheral stuff and modern chipsets, etc). thanks in advance -- Jakob

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