coreboot October 2004

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RE: Testbios help with nvidia 6800Gt and simple how to
by Dave Aubin 05 Oct '04

05 Oct '04

I've taken the time to put together a simple testbios faq. I hope it is helpful. Feedback and additions are welcome. Thanks, Dave Testbios (vgabios) Faq Date: 10/5/2004 Author(s): David Aubin daubin(a)actuality-systems.com Purpose: Testbios is an i386 emulator that sits on top of user space linux. It's primary purpose is to provide program video rom's in to the cached memory area. Faq Contents: 1. Where to obtain testbios 2. Prerequisites 3. How to build testbios 4. How to retrieve a good video bios 5. How to use testbios 1. Where to obtain testbios A. Testbios(vgabios) can be retrieved from the linuxbios/freebios source tree: http://www.linuxbios.org/developer/download/index.html 2. Prerequisites A. You must have installed pci-utils i. Get http://atrey.karlin.mff.cuni.cz/~mj/pciutils.shtml 3. How to build testbios: A. cd freebios/util/vgabios B. Edit ./Makefile and fill in the correct values for your environment I build on a 64 AMD so my makefile looks like this --Being ./Makefile for x64-- CC = gcc ARCH := $(shell uname -m | sed -e s,i[3456789]86,i386,) INCLUDE = -I ../pciutils-2.1.11 CFLAGS = -Wall -Ix86emu/include -O2 -g $(INCLUDE) INTOBJS = int10.o int15.o int16.o int1a.o inte6.o OBJECTS = testbios.o helper_exec.o helper_mem.o $(INTOBJS) LDFLAGS = -static-libgcc -static LIBS = x86emu/src/x86emu/libx86emu.a ../pciutils-2.1.11/lib/libpci.a # user space pci is the only option right now. OBJECTS += pci-userspace.o ifeq ($(shell if test "$(ARCH)" == "x86_64" ; then echo 1; fi), 1) CFLAGS +=-m32 -march=i386 endif all: testbios testbios: $(OBJECTS) $(LIBS) $(CC) $(CFLAGS) -o testbios $(OBJECTS) $(LDFLAGS) $(LIBS) helper_exec.o: helper_exec.c test.h x86emu/src/x86emu/libx86emu.a: $(MAKE) -C x86emu/src/x86emu/ -f makefile.linux clean: $(MAKE) -C x86emu/src/x86emu/ -f makefile.linux clean rm -f *.o *~ testbios distclean: clean $(MAKE) -C x86emu/src/x86emu/ -f makefile.linux clean --End ./Makefile-- C. Edit ~vgabios/x86emu/src/x86emu/makefile.linux and fill in the correct values for your environment I build on a 64 AMD so my makefile looks like this --Begin ~vgabios/x86emu/src/x86emu/makefile.linux-- ######################################################################## ##### # # Realmode X86 Emulator Library # # Copyright (C) 1996-1999 SciTech Software, Inc. # # ======================================================================== # # Permission to use, copy, modify, distribute, and sell this software and # its documentation for any purpose is hereby granted without fee, # provided that the above copyright notice appear in all copies and that # both that copyright notice and this permission notice appear in # supporting documentation, and that the name of the authors not be used # in advertising or publicity pertaining to distribution of the software # without specific, written prior permission. The authors makes no # representations about the suitability of this software for any purpose. # It is provided "as is" without express or implied warranty. # # THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, # INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO # EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR # CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF # USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR # OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR # PERFORMANCE OF THIS SOFTWARE. # # ======================================================================== # # Descripton: Linux specific makefile for the x86emu library. # ######################################################################## ##### TARGETLIB = libx86emu.a OBJS=\ debug.o \ decode.o \ fpu.o \ ops.o \ ops2.o \ prim_ops.o \ sys.o $(TARGETLIB): $(OBJS) ar rv $(TARGETLIB) $(OBJS) INCS = -I. -Ix86emu -I../../include CFLAGS += -D__DRIVER__ -DFORCE_POST -D_CEXPORT= -DNO_LONG_LONG -DDEBUG ARCH := $(shell uname -m | sed -e s,i[3456789]86,i386,) ifeq ($(shell if test "$(ARCH)" == "x86_64" ; then echo 1; fi), 1) CFLAGS +=-m32 -march=i386 endif .c.o: # gcc -m32 -march=i386 -g -O -Wall -c $(CFLAGS) $(INCS) $*.c gcc -g -O -Wall -c $(CFLAGS) $(INCS) $*.c .cpp.o: # gcc -m32 -march=i386 -c $(CFLAGS) $(INCS) $*.cpp gcc -c $(CFLAGS) $(INCS) $*.cpp clean: rm -f *.a *.o validate: validate.o libx86emu.a gcc -o validate validate.o -lx86emu -L. --End ~vgabios/x86emu/src/x86emu/makefile.linux-- D. Once built you could have a 32bit testbios executable made. Depending on your embedded environment you might want to have it built shared as the above example makes it static. Just remove -static-libgcc -static from the LDFLAGS on ./Makefile if you wish to have it built shared. 4. How to retrieve a good video bios A. There are sites that have video bios roms on their website. I know of this one for nvidia cards: http://whitebunny.demon.nl/hardware/chipset_nvidia.html B. However you should be able to retrieve your own video bios as well with linux. i. Boot up a machine with a commercial bios (not linux bios) with the video card you wish to work under linux bios. ii. From the command line enter: dd if=/dev/mem of=vgabios.bin skip=1536 count=128 or dd if=/dev/mem of=vgabios.bin bs=1k count=64 skip=786432 This assumes you card's bios is cached in 0xc0000. You can see where and how much your card's bios is using by doing a cat iomem | grep "Video ROM" a. dd Explained (man dd to learn more): 1. if is the location to retrieve from. 2. of is the output file (your rom image) 3. skip jumps n blocks where the default n is 512 bytes 4. count is how many blocks you wish to read 5. bs is the block size C. You now have a video bios image 5. How to use testbios A. Currently testbios only works from user space linux (10/4/04) B. Example from a linux command line or script enter the following to get your video bios programmed: ./testbios -s 65536 --abseg /dev/mem ./vgabios.bin i. Testbios explained a. -s <size> how much of the video bios is there b. --abseg where would you like to write this (/dev/mem default) c. filename of video bios d. -d diag mode <pci busdevfn> 1. How to get pci busdevfn A. lspci B. look for your video card Example: 2:00:00 2 (00 << 3) | 00 = 0x200 Example: 00:12.0: 0 (12 << 3) | 0 = 0x90 e. -t dump f. -c codesegment Where do you want to start, default is 0xc0000 g. -b base Where do you want base to be default is 0xc000 h. -i instruction pointer usually left off as the default -----Original Message----- From: linuxbios-admin(a)clustermatic.org [mailto:linuxbios-admin@clustermatic.org] On Behalf Of Dave Aubin Sent: Tuesday, October 05, 2004 2:22 PM To: Richard Smith Cc: linuxbios(a)clustermatic.org Subject: RE: Testbios help with nvidia 6800Gt and simple how to Hi, Thank you:) Yes, it was at 0xc0000-0xc7fff, which is only 32k. But the image I got from the windows tool was 64k (double 8000). Weird. I would like to stay away from window tools. The info you provided is nice. I wish there was a way for us To make a faq and we could add this to the testbios faq. There Is a lot of good info on the clustermatic list, but it is all Dispersed. Ron if I write a simple faq can you provide some mechanism to Allow updates to it? Thanks, Dave -----Original Message----- From: Richard Smith [mailto:rsmith@bitworks.com] Sent: Tuesday, October 05, 2004 2:16 PM To: Dave Aubin Cc: linuxbios(a)clustermatic.org Subject: Re: Testbios help with nvidia 6800Gt and simple how to Dave Aubin wrote: > It seems my dd returned an unusable binary. I found a good binary for > The nvidia card from here: > http://whitebunny.demon.nl/hardware/chipset_nvidia.html > I was wondering about your dd command that but I had not had a chance to respond yet. This is what I use: dd if=/dev/mem of=vbios.bin bs=1k count=64 skip=786432 That will rip the bios from 0x0c0000. You can verify that you actually have bios there with 'hd -s 0x0c0000 -n 256 /dev/mem' in some cases it may be located at 0x0e0000 rather than 0x0c0000. It should start with the 0x55aa (Little endian) or 0xaa55 (big endian) and futher on you should see some text identifying the bios. -- Richard A. Smith _______________________________________________ Linuxbios mailing list Linuxbios(a)clustermatic.org http://www.clustermatic.org/mailman/listinfo/linuxbios

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Adding a PCI device that doesn't exist (yet)
by Jay Miller 05 Oct '04

05 Oct '04

Hi All, The PCI interface to our "special sauce" is an FPGA that we're programming after the OS boots. The hardware doesn't have PCI hot-plug support, which means we're forced to reboot after programming in order to re-enumerate the bus in BIOS. Or are we? I was thinking of replacing the default scan_bus method with one that calls the default method for most devices and inserts the non-existent device information into the table at the appropriate time. Has anyone been successful at this sort of thing? Cheers, Jay Miller 781-229-7812x117 Actuality Systems, Inc. jmiller(a)actuality-systems.com

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RE: Testbios help with nvidia 6800Gt and simple how to
by Dave Aubin 05 Oct '04

05 Oct '04

Hi, Thank you:) Yes, it was at 0xc0000-0xc7fff, which is only 32k. But the image I got from the windows tool was 64k (double 8000). Weird. I would like to stay away from window tools. The info you provided is nice. I wish there was a way for us To make a faq and we could add this to the testbios faq. There Is a lot of good info on the clustermatic list, but it is all Dispersed. Ron if I write a simple faq can you provide some mechanism to Allow updates to it? Thanks, Dave -----Original Message----- From: Richard Smith [mailto:rsmith@bitworks.com] Sent: Tuesday, October 05, 2004 2:16 PM To: Dave Aubin Cc: linuxbios(a)clustermatic.org Subject: Re: Testbios help with nvidia 6800Gt and simple how to Dave Aubin wrote: > It seems my dd returned an unusable binary. I found a good binary for > The nvidia card from here: > http://whitebunny.demon.nl/hardware/chipset_nvidia.html > I was wondering about your dd command that but I had not had a chance to respond yet. This is what I use: dd if=/dev/mem of=vbios.bin bs=1k count=64 skip=786432 That will rip the bios from 0x0c0000. You can verify that you actually have bios there with 'hd -s 0x0c0000 -n 256 /dev/mem' in some cases it may be located at 0x0e0000 rather than 0x0c0000. It should start with the 0x55aa (Little endian) or 0xaa55 (big endian) and futher on you should see some text identifying the bios. -- Richard A. Smith

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Re: Testbios help with nvidia 6800Gt and simple how to
by Richard Smith 05 Oct '04

05 Oct '04

Dave Aubin wrote: > It seems my dd returned an unusable binary. I found a good binary for > The nvidia card from here: > http://whitebunny.demon.nl/hardware/chipset_nvidia.html > I was wondering about your dd command that but I had not had a chance to respond yet. This is what I use: dd if=/dev/mem of=vbios.bin bs=1k count=64 skip=786432 That will rip the bios from 0x0c0000. You can verify that you actually have bios there with 'hd -s 0x0c0000 -n 256 /dev/mem' in some cases it may be located at 0x0e0000 rather than 0x0c0000. It should start with the 0x55aa (Little endian) or 0xaa55 (big endian) and futher on you should see some text identifying the bios. -- Richard A. Smith

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RE: Testbios help with nvidia 6800Gt and simple how to
by Dave Aubin 05 Oct '04

05 Oct '04

Found the answer. It seems my dd returned an unusable binary. I found a good binary for The nvidia card from here: http://whitebunny.demon.nl/hardware/chipset_nvidia.html Seems they use a windows tool to retrieve the rom. Perhaps with this Card being so new this was the problem I was having. In any even My GeForce 6800GT now works under Linux bios:) Hope this helps someone. -----Original Message----- From: linuxbios-admin(a)clustermatic.org [mailto:linuxbios-admin@clustermatic.org] On Behalf Of Dave Aubin Sent: Tuesday, October 05, 2004 10:01 AM To: linuxbios(a)clustermatic.org Subject: Testbios help with nvidia 6800Gt and simple how to Hello, I'm trying to get an nvidia 6800 Gt video card to work with linuxbios, but I am coming up short. Below is a mini how to with test bios and I did follow the steps, but it still doesn't work. Can someone please help me? I did the exact same steps with an nvidia5950 and it worked great. Is there something I am missing? Simple Test Bios How to. Purpose: Testbios provides an i386 emulator for programming the video bios. How to: First you need to retrieve the video bios from a machine booted up with a commercial bios running linux. Then once that is done you can execute the bios by using testbios. How to retrieve video bios 1. Boot up machine with commercial bios in to a linux environment 2. dd if=/dev/mem of=vgabios.bin skip=1536 count=128 from a terminal window A. This copies the video bios out of /dev/mem and places it in vgabios.bin How to execute testbios 1. Boot up machine with Linuxbios in to a linux environment 2. run testbios --abseg /dev/mem -s 65536 /root/vgabios.bin A. If working you should see the video bios welcome message on the screen Thanks, Dave:) _______________________________________________ Linuxbios mailing list Linuxbios(a)clustermatic.org http://www.clustermatic.org/mailman/listinfo/linuxbios

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Freebios2 on EPIA-M / MII - a large patch
by Nick Barker 05 Oct '04

05 Oct '04

I've been working on freebios2 for the EPIA-MII for the last couple of months as a way of getting to know freebios2. I've got to the stage where I have a lot of things working, and would like to contribute them back to the project. These include: - ACPI power management and interrupt routing (could be applicable to other platforms as well) - Boot off onboard Compact Flash on the MII - Legacy VGA BIOS working - Mtrr's set up correctly for VGA and framebuffer - AGP and GART working - set up vt1211 as new device for enabling COM,LPT,FDC and H/W monitoring - 1/2 speed serial baud rate fix. The memory initialisation code is the static code borrowed from V1, and setup for 256Mb only at the moment. I have a source code patch made up which is approximately 200K big uncompressed (64K bzipped), and I think some may object if I post something of that size on the mailing list. Who should I direct this to so that it can get reviewed/incorporated? Nick Barker

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Testbios help with nvidia 6800Gt and simple how to
by Dave Aubin 05 Oct '04

05 Oct '04

Hello, I'm trying to get an nvidia 6800 Gt video card to work with linuxbios, but I am coming up short. Below is a mini how to with test bios and I did follow the steps, but it still doesn't work. Can someone please help me? I did the exact same steps with an nvidia5950 and it worked great. Is there something I am missing? Simple Test Bios How to. Purpose: Testbios provides an i386 emulator for programming the video bios. How to: First you need to retrieve the video bios from a machine booted up with a commercial bios running linux. Then once that is done you can execute the bios by using testbios. How to retrieve video bios 1. Boot up machine with commercial bios in to a linux environment 2. dd if=/dev/mem of=vgabios.bin skip=1536 count=128 from a terminal window A. This copies the video bios out of /dev/mem and places it in vgabios.bin How to execute testbios 1. Boot up machine with Linuxbios in to a linux environment 2. run testbios --abseg /dev/mem -s 65536 /root/vgabios.bin A. If working you should see the video bios welcome message on the screen Thanks, Dave:)

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RE: e7500 code
by YhLu 04 Oct '04

04 Oct '04

I keep that in V2 to let others to check if the converting to C is right. YH -----Original Message----- From: Ronald G. Minnich [mailto:rminnich@lanl.gov] Sent: Monday, October 04, 2004 10:40 AM To: YhLu Cc: linuxbios(a)clustermatic.org Subject: RE: e7500 code On Mon, 4 Oct 2004, YhLu wrote: > That seems not be used. Please search it. it ought to be removed then? ron

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RE: e7500 code
by YhLu 04 Oct '04

04 Oct '04

That seems not be used. Please search it. Regards YH -----Original Message----- From: Ronald G. Minnich [mailto:rminnich@lanl.gov] Sent: Monday, October 04, 2004 9:32 AM To: linuxbios(a)clustermatic.org Subject: e7500 code it hardwires CASL to a pre-defined value: #define MRS_VALUE (MODE_NORM | CAS_LATENCY | BURST_TYPE | BURST_LENGTH) which is going to be trouble if the SPD value is different. e75xx maintainers: did you really want to do this? ron _______________________________________________ Linuxbios mailing list Linuxbios(a)clustermatic.org http://www.clustermatic.org/mailman/listinfo/linuxbios

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e7500 code
by Ronald G. Minnich 04 Oct '04

04 Oct '04

it hardwires CASL to a pre-defined value: #define MRS_VALUE (MODE_NORM | CAS_LATENCY | BURST_TYPE | BURST_LENGTH) which is going to be trouble if the SPD value is different. e75xx maintainers: did you really want to do this? ron

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coreboot October 2004