Am Sonntag, 27. Februar 2005 17.08 schrieb Matt Porter: > On Sun, Feb 27, 2005 at 04:10:30PM +0100, Niklaus Giger wrote: > > Am Samstag, 26. Februar 2005 23.28 schrieb Niklaus Giger: > > > Hi > > > > > > I would like to port Linux to a custom PPC405GPr board. Its hardware > > > runs vxWorks fine for more than a year. > > > > I made some more progress. After adding 3 lines for MMU support with the > > BDI I can debug the startup up to kernel_start using BDI. > > > > Afterwards my console changes the baudrate for still unknown reasons. > How do you know this? Console isn't initialized until after the kernel > command line printk and a few other facilities are initialized. Because I see the following output arch: exit *???????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????? which for me is typical for a wrong baudrate. Okay, I do not know this. Specially it may not be the "console" device but whatever is going out at this moment via the PPC405GPr internal UART0 device. > > Analysing the __log_buf I get the following output > > (gdb) x/s &__log_buf > > 0xc01accfc <ratelimit_lock.9>: "<4>Linux version 2.6.10 > > (niklaus at ng.ngiger.dyndns.org) (gcc-Version 3.3.5 (Debian 1:3.3.5-8)) #15 > > Sun Feb 27 14:44:27 CET 2005\n<7>On node 0 totalpages: 8240\n<7> DMA > > zone: 8240 pages, LIFO batch:2\n<7>"... > > (gdb) x > > 0xc01acdc4 <ratelimit_lock.9+200>: " Normal zone: 0 pages, LIFO > > batch:1\n<7> HighMem zone: 0 pages, LIFO batch:1\n<4>Built 1 > > zonelists\n<4>Kernel command line: ip=172.25.1.6\n<4>PID hash table > > entries: 256 (order:8, 4096 bytes)\n" > > (gdb) x > > 0xc01ace84 <ratelimit_lock.9+392>: "" > > Is this all of the log_buf output? Try setting your kernel cmdline > with "console=ttyS0,115200" where 115200 is you console baudrate > you are using in U-Boot. Otherwise, the kernel 8250 driver has no > idea which baudrate to set for the 8250/console. Yes, this is all. I tried you suggestion, but I got no other result. The paramter "console=ttyS0,9600" now is found in the log buffer. Or is ttyS0 the wrong device name for the internal PPC405Gpr UART0? I am using 9600 8 bit no parity which should be anyway the default baudrate for the console.
Thanks for your help -- Niklaus Giger Wieshoschet 6 CH-8753 Mollis Tel. ++41 55 612 20 54 (privat) Tel. ++41 55 618 64 68 (Gesch?ft)
