April 2003 - coreboot - mail.coreboot.org

Is reset32.inc required ?
by Shubhangi Jadhav April 22, 2003

April 22, 2003

Hi, I'm trying to port Linuxbios to a motherboard which has a VIA C3 processor. For this I'm using l440bx mainboard config file as a reference. In the config file I found reference to the following includes : cpu/i386/entry16.inc cpu/i386/entry32.inc cpu/i386/reset16.inc However there's no reference to reset32.inc. Is it required to add reset32.inc, please let me know. Regards, Shubhangi

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_ROMBASE
by Shubhangi Jadhav April 22, 2003

April 22, 2003

Hi, Does _ROMBASE=0xf0000 hold good for all i386 processors. I'm using a VIA C3 processor, is this value of _ROMBASE correct. Thanks, Shubhangi

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About 82810e north bridge
by Deepak Kotian April 22, 2003

April 22, 2003

Hi, There seems to be two devices in Intel 82810e north bridge, one is Memory controller Hub and other is Graphical controller HUB. Is it OK to just do the initialization for Memory controller HUB and forget about Graphical controller HUB. Also, I saw 82815ep on linuxbios tree, which has support for MCH only and no AGP. This is very much similar to 82810e with some address changed. What would happen if I support MCH for 82810e , will LinuxBIOS still come up. Could someone please give an opinon on this. Thanks and Regards Deepak

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entry16.inc code doubt
by dkotian3＠vsnl.net April 22, 2003

April 22, 2003

Hi, Could someone please tell me what exactly these two lines in the entry16.inc for i386 architecture is doing ***Extract*** andl $0x7FFAFFD1, %eax /* PG,AM,WP,NE,TS,EM,MP = 0 */ orl $0x60000001, %eax /* CD, NW, PE = 1 */ ***Extract End*** What is the reference for this .. Thanks and Regards Deepak

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p4dpe/g2 and p4dpeg2 builds broken
by Ronald G. Minnich April 21, 2003

April 21, 2003

I'm working on it but ... linuxbios_c.o: In function `displayinit': linuxbios_c.o(.text+0x3d6): undefined reference to `get_option' linuxbios_c.o: In function `remove_logical_cpus': linuxbios_c.o(.text+0xc57): undefined reference to `get_option' linuxbios_c.o: In function `sizeram': linuxbios_c.o(.text+0x20ae): undefined reference to `get_option' linuxbios_c.o: In function `i786_cpufixup': linuxbios_c.o(.text+0x2442): undefined reference to `get_option' linuxbios_c.o: In function `mainboard_fixup': linuxbios_c.o(.text+0x25f6): undefined reference to `get_option' linuxbios_c.o(.text+0x2621): more undefined references to `get_option' follow linuxbios_c.o: In function `ich3_rtc_init': linuxbios_c.o(.text+0x5cb8): undefined reference to `rtc_init' collect2: ld returned 1 exit status make: *** [linuxbios_c] Error 1 I'm looking. ron

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IDE back port
by Ronald G. Minnich April 21, 2003

April 21, 2003

I'm going to have a go at back-porting the IDE driver from etherboot to linuxbios, turns out I need this. ron

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Assembly instruction reference for i386
by dkotian3＠vsnl.net April 21, 2003

April 21, 2003

Hi, Can some give a good assembly instruction reference for i386 architechture which can be used to follow the code in LinuxBIOS. Thanks and Regards Deepak

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Re: romcc compiles to p5, right?
by ebiederman＠lnxi.com April 21, 2003

April 21, 2003

ron minnich <rminnich(a)lanl.gov> writes: > also, should .c files for romcc really be .rc, or not? make rules might be > easier. Don't know, just wondering. .c There only needs to be one make rule as everything romcc compiles needs to be compiled all at once. So it is one file with a bunch of includes. Additionally some of the code I hope to allow to be compiled either way. Eric

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Status report....
by ebiederman＠lnxi.com April 21, 2003

April 21, 2003

I am slowly putting together a working LinuxBIOS development tree. I have romcc up and working and initializing memory on my target hammer board. The memory configuration completely hard coded but it works. I am using gcc's C preprocessor because I need the ability to stringize a macro to print out the LinuxBIOS version string, and I don't feel like implementing macros with arguments and all of the little quirks right now. One of my first steps is making hardwaremain generic and in just starting that and looking at it's dependencies I have found a huge mess of code that needs to be cleaned up. Just a small taste. Why are the I/O primitives in cpu/p5/io.h and not directly in arch/io.h? And why to we have piles of code in that header that are ifdefed out. Most of the code left over from the earliest days of LinuxBIOS is similarly nasty. There is a list that goes on and on, and tomorrow I will get serious about cleaning it out. With a little luck I am maybe a week out from having my hammer code being self hosting. That is a week out from gluing the LinuxBIOS tree back together enough that I can load etherboot and have normal and fallback images. At which point I should have enough bandwidth to get the last of the little things I care about resolved in on the stable branch. I would worry about that more but my primary responsibility at this point is to get the Hammer port up and going. Eric

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the p4dpe-g2 build problem
by Ronald G. Minnich April 21, 2003

April 21, 2003

get_option is defined for the moto clock chip. That is not included in the p4dpe-g2 build any more. I'll try to get something going however. ron

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