OpenBIOS October 2009

openbios@openbios.org

6 participants
6 discussions

starting
by G 3 18 Oct '10

18 Oct '10

I have begun doing work with OpenBIOS. I was wondering if it is possible to compile OpenBIOS for PowerPC on Mac OS X? If not, what Linux distro should I use? Any advice would really help.

6 17

QEMU OpenBIOS booting?
by Steven Noonan 24 May '10

24 May '10

Hi folks, I've been trying to use OpenBIOS with QEMU, and I've had trouble getting it to boot any PowerPC-based OS discs (Linux, Mac OS X, etc). OpenBIOS just doesn't seem to find anything bootable. If I try booting QEMU with -nographic, I get this output (I get the same with a self-built openbios-qemu.elf from the OpenBIOS SVN as well): ---- snip ---- >> ============================================================= >> OpenBIOS 1.0 [Apr 12 2009 00:55] >> Configuration device id QEMU version 1 machine id 1 >> CPUs: 1 >> Memory: 128M >> UUID: 00000000-0000-0000-0000-000000000000 >> CPU type PowerPC,970FX Welcome to OpenBIOS v1.0 built on Apr 12 2009 00:55 >> ELF - yaboot_startup: Entering boot, no path >> ELF - try_bootinfo: Trying hd:0,ppc\bootinfo.txt >> ELF - try_bootinfo: Can't open hd:0,ppc\bootinfo.txt >> ELF - try_path: Trying hd:2,\ofclient >> ELF - try_path: Can't open hd:2,\ofclient >> ELF - try_path: Trying hd:2,\yaboot conf=hd:2,\yaboot.conf >> ELF - try_path: Can't open hd:2,\yaboot >> *** Boot failure! No secondary bootloader specified *** ---- snip ---- Laurent Vivier suggested in this conversation in February (http://lists.openbios.org/pipermail/openbios/2009-February/003476.html) that there could be a bug in partition map decoding. Has such a bug been confirmed? I was trying to find the bug myself (I am an experienced C/C++ programmer), but the bug seems to be subtle, and my lack of familiarity with the code base doesn't help much. I've been trying to figure this out for 7 hours straight now... Any advice or other help would be much appreciated! - Steven

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PATCH: Implement Forth source debugger for OpenBIOS
by Mark Cave-Ayland 09 Nov '09

09 Nov '09

Hi all, Whilst spending some time working on debugging SPARC64 support with Qemu/OpenBIOS, it became readily apparent that progress was being hampered by the lack of debugging facilities in OpenBIOS (see http://lists.openbios.org/pipermail/openbios/2009-August/003949.html). Hence I've been working on adding a source debugger to OpenBIOS which should enable developers to step/trace through Forth words in order to locate bugs in the lower level Forth OpenBIOS code. The attached patch implements a Forth Source Debugger based upon the IEEE-1275 specification; it is not a comprehensive implementation but has already proved to be very useful in my tests here. A sample session using the debugger goes something like this: Welcome to OpenBIOS v1.0 built on Oct 31 2009 10:09 Type 'help' for detailed information [unix] Booting default not supported. 0 > : bar ." test " ; ok 0 > debug bar Stepper keys: <space>/<enter> Up Down Trace Rstack Forth ok 0 > bar : bar ( Empty ) 0xf7e11f0c: (") : (") ( Empty ) 0xf7dfd928: r> ( f7e11f0c ) 0xf7dfd92c: dup ( f7e11f0c f7e11f0c ) 0xf7dfd930: 2 ( f7e11f0c f7e11f0c 2 ) 0xf7dfd934: cells ( f7e11f0c f7e11f0c 8 ) 0xf7dfd938: + ( f7e11f0c f7e11f14 ) 0xf7dfd93c: over ( f7e11f0c f7e11f14 f7e11f0c ) 0xf7dfd940: cell+ ( f7e11f0c f7e11f14 f7e11f10 ) 0xf7dfd944: @ ( f7e11f0c f7e11f14 5 ) 0xf7dfd948: rot ( f7e11f14 5 f7e11f0c ) 0xf7dfd94c: over ( f7e11f14 5 f7e11f0c 5 ) 0xf7dfd950: + ( f7e11f14 5 f7e11f11 ) 0xf7dfd954: aligned ( f7e11f14 5 f7e11f14 ) 0xf7dfd958: cell+ ( f7e11f14 5 f7e11f18 ) 0xf7dfd95c: >r ( f7e11f14 5 ) 0xf7dfd960: (semis) [ Finished (") ] ( f7e11f14 5 ) 0xf7e11f1c: type test ( Empty ) 0xf7e11f20: (semis) [ Finished bar ] ok 0 > bar : bar ( Empty ) 0xf7e11f0c: (") : (") ( Empty ) 0xf7dfd928: r> [ Up to bar ] ( f7e11f14 5 ) 0xf7e11f1c: type test ( Empty ) 0xf7e11f20: (semis) [ Finished bar ] ok 0 > As eluded to in earlier posts to the list, my initial attempts at adding debug support were focused on storing additional information in the rstack. Unfortunately this created extra problems in debugging some of the more interesting Forth words, since they would manipulate the return stack and cause the debugger to get confused. My final implementation works in a much more simple way; when the debug word is invoked with the name of the word to debug, the start and end addresses of the word are added to a debug linked list. Then in the next() function, we iterate through the linked list to see if the current PC lies within one of the functions within. If this is the case, we enter the source debugger in step/trace mode as appropriate. Having given the patch a reasonably good test here, I'm quite pleased with the additional functionality it provides. The only minor downsides I can see are that the patch adds extra work in docol(), semis() and next() in order to update the debug linked list. I've tried to wrap most of the complexity in conditional while() statements so that it is only invoked while the debugger is active, and so should have a minimal impact on normal runtime performance (which seems to be the case here). Please test the patch and let me know if it requires extra work in order for it to be considered ready for committing to the OpenBIOS SVN repository. ATB, Mark. -- Mark Cave-Ayland - Senior Technical Architect PostgreSQL - PostGIS Sirius Corporation plc - control through freedom http://www.siriusit.co.uk t: +44 870 608 0063 Sirius Labs: http://www.siriusit.co.uk/labs

5 11

r590 - trunk/openbios-devel/arch/ppc/qemu
by svn＠openbios.org 19 Oct '09

19 Oct '09

Author: laurent Date: 2009-10-20 01:02:10 +0200 (Tue, 20 Oct 2009) New Revision: 590 Modified: trunk/openbios-devel/arch/ppc/qemu/main.c Log: ppc: if "\\:tbxi" (mac) fails, try "ppc\bootinfo.txt" (chrp). This is needed to load the bootloader of OpenBSD. Signed-off-by: Laurent Vivier <Laurent(a)vivier.eu> Modified: trunk/openbios-devel/arch/ppc/qemu/main.c =================================================================== --- trunk/openbios-devel/arch/ppc/qemu/main.c 2009-09-21 23:12:02 UTC (rev 589) +++ trunk/openbios-devel/arch/ppc/qemu/main.c 2009-10-19 23:02:10 UTC (rev 590) @@ -205,8 +205,12 @@ static void newworld_boot( void ) { - static const char * const chrp_path = "\\\\:tbxi" ; + static const char * const chrp_path[] = { "\\\\:tbxi", + "ppc\\bootinfo.txt", + NULL + }; char *path = pop_fstr_copy(), *param; + int i; param = strchr(path, ' '); if (param) { @@ -237,7 +241,8 @@ param = pop_fstr_copy(); } try_path(path, NULL, param); - try_path(path, chrp_path, param); + for (i = 0; chrp_path[i]; i++) + try_path(path, chrp_path[i], param); } else { uint16_t boot_device = fw_cfg_read_i16(FW_CFG_BOOT_DEVICE); switch (boot_device) { @@ -249,12 +254,14 @@ path = strdup("cd:"); break; } - try_path(path, chrp_path, param); + for (i = 0; chrp_path[i]; i++) + try_path(path, chrp_path[i], param); } } else { NEWWORLD_DPRINTF("Entering boot, path %s\n", path); try_path(path, NULL, param); - try_path(path, chrp_path, param); + for (i = 0; chrp_path[i]; i++) + try_path(path, chrp_path[i], param); } printk("*** Boot failure! No secondary bootloader specified ***\n"); }

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OpenBIOS version 1.1?
by G 3 14 Oct '09

14 Oct '09

Is there a roadmap or plan that states when version 1.1 of OpenBIOS will be declared? I'm wondering this because a lot of features have been added to OpenBIOS since version 1.0 was released (7 months ago).

2 1

Support for 16 head harddisk on OLD Interactive Unix configured for 15 head harddisk
by Hanusz L. 06 Oct '09

06 Oct '09

Hello, I have an old system running Interactive Unix on a 15 head harddisk (4Gb). I would like to clone this system to a 16 head harddisk because it is now difficult to find 15 head harddisks. The problem is that I cannot modify the system which think it has a 15 head harddisk. I suppose that Interactive unix use the Int13 interrupt mechanism to access the disk (am I wrong ?). I wonder if there is a possibility to modify openbios so that a 16 head harddisk is used and is simulated as a 15 head harddisk by the bios ? I would probably have to modify the drivers/ide.c file to do a conversion. My questions are: - Can openbios boot Interactive Unix ? - What implementation should I use ? Thanks for any help, Leszek Hanusz ##################################################################################### This e-mail message has been scanned for Viruses and Content and cleared by Mailsecurity software #####################################################################################

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