VxWorks.c ??
Hi Mark After that, I need to set up a development environment. I have the ppc kernel source, but I'm not able to get libc and u-boot to compile. Should I give up and just use the ELDK? Definitely go with ELDK, it will save you quite a few grey hairs and a considerable amount of time. Also, what JTAG Emulators and programmers do you use that are compatible with Linux and MPC8xx? Abatron's BDI2000 is your best option. Well that's a personal preference anyway :-) Regards Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
System crash in kernel_thread
I experienced a similar problem with my 860 based board. The solution was in DER (Debug Enable Register) configured by the BDI. I had to remove a bit, I just don't remember which one. Thanks, that solved it, I had to clear the SYSIE in the Debug Enable register. Regards Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
System crash in kernel_thread
Hi Guys I'm trying to port Linux to a proprietary board. I got u-boot working good, and now that I start the kernel I find that the system _halts_ when it tries to run init using the kernel_thread routine in init/main.c/rest_init(). Can someone suggest why this could be happening? This is my output: Linux version 2.4.20 (fpereira at rigel) (gcc version 2.95.4 20010319 (prerelease/f ranzo/20011204)) #17 Tue Jun 3 11:02:30 SAST 2003 On node 0 totalpages: 8192 zone(0): 8192 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: Decrementer Frequency = 18750/60 Warning: real time clock seems stuck! Calibrating delay loop... 49.76 BogoMIPS Memory: 30892k available (1048k kernel code, 380k data, 52k init, 0k highmem) Dentry cache hash table entries: 4096 (order: 3, 32768 bytes) Inode cache hash table entries: 2048 (order: 2, 16384 bytes) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes) Page-cache hash table entries: 8192 (order: 3, 32768 bytes) POSIX conformance testing by UNIFIX ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
mmap with flash
I want to implement mmap with flash device! You can use the kernel flash module for this. See /linux/drivers/char/flash.c. Instead of mmaping memory (mem) you can simply open and then mmap the actual flash _device_. Regards Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
consistent_alloc
Hi All I'm using Denx Linux 2.4.20 running on am MPC8xx processor. I've found that consistent_alloc does not seem to allocate memory from a cache-free region. I've found that even though I'm using consistent_alloc to allocate memory, I still have to flush the relevant area before letting the CPM read it. Is there any alternative to consistent_alloc, or should it work and possibly I am using it incorrectly? Regards Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Cramfs root file system
Hi all / Dennis 1) in kernel file init/main.c 's dev_name_struct, add entry for mtdblock, 0x1f00 if it's not there already. 2) in ppcboot =setenv bootargs init=/linuxrc root=/dev/mtdblockx I added the mtdblock entry and, yes it seems to have helped. The kernel however now returns... mtdblock_open ok mtdblock: read on initrd at 0x400, size 0x400 mtdblock: read on initrd at 0x0, size 0x1000 mtdblock: read on initrd at 0x1000, size 0x1000 mtdblock: read on initrd at 0x2000, size 0x1000 mtdblock: read on initrd at 0x3000, size 0x1000 wrong magic VFS: Mounted root (jffs filesystem) readonly. Ive looked at the kernel code, and it looks like it doesn't support a cramfs system only jffs (ROM systems anyway). Can anyone confirm whether Linux 2.4.4 supports cramfs for root file systems? Thanks Flavio Pereira -Original Message- From: Dennis Khoo [mailto:[EMAIL PROTECTED] Sent: Thursday, November 21, 2002 9:18 PM To: Flavio Pereira; LinuxPPC Subject: Re: Cramfs root file system Flavio, Please append a correct root= boot option Kernel panic: VFS: Unable to mount root fs on 02:00 Now, is it possible to do what Im trying to do, if so are there any suggestions as to what I'm doing wrong? I saw the same error when I was trying to mount jffs2 as root. Maybe your problem is similar to mine. My solution: 1) in kernel file init/main.c 's dev_name_struct, add entry for mtdblock, 0x1f00 if it's not there already. 2) in ppcboot =setenv bootargs init=/linuxrc root=/dev/mtdblockx Hope this helps. Dennis Khoo Software Engineer Adapcom, Inc ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Cramfs root file system
Hi All Im trying to use a cramfs image as a root-file system at kernel boot time. I've built a cramfs image, copied it into my flash device (mtd3), and can successfully mount it at runtime. However at boot time I use root=dev/mtdblock3 (or dev/mtd3 im not sure which one to use) and I get the following errors... NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. Root-NFS: No NFS server available, giving up. VFS: Unable to mount root fs via NFS, trying floppy. request_module[block-major-2]: Root fs not mounted VFS: Cannot open root device mtdblock3 or 02:00 Please append a correct root= boot option Kernel panic: VFS: Unable to mount root fs on 02:00 Now, is it possible to do what Im trying to do, if so are there any suggestions as to what I'm doing wrong? Thanks Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Bug in sharp.c flash driver
Hi Wolfgang
I finally sorted out my MTD problems. It turns out that there is a
problem in drvivers/mtd/sharp.c. In function sharp_erase
if (instr-callback) {
instr-callback(instr);
}
instr-state never gets set so the mtd driver never exits. We need to
set the state before this if statement:
instr-state = MTD_ERASE_DONE;
Regards
Flavio Pereira
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
MTD Driver (denx Linux 2.4.4)
Hi All I'm having difficulty in getting the MTD driver working. I'm using a non-CFI complaint Sharp chip so I have defined CONFIG_MTD_SHARP. However I cannot locate anywhere in the code where the kernel will call sharp_probe_init. In any case I forced init_mtd (mtdcore.c) to call sharp_probe_init and it seems to load the driver okay as I see the following on my serial console JFFS version 1.0, (C) 1999, 2000 Axis Communications AB JFFS2 version 2.1. (C) 2001 Red Hat, Inc., designed by Axis Communications AB. MTD Sharp chip driver ds at lineo.com MTD Sharp chip driver ds at lineo.com Now my question is, do I need to force this driver to load or am I missing some compile flag? How do I go about partitioning the flash, ie how does this driver link to a flash map? Any help would be appreciated Thanks in advance Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linker problem
Hi All Im trying to cross compile some c++ code for the 8260 chip. However when the linker executes it return the following error: undefined reference to `__throw' Can anyone please give some advice on how to tackle this problem? What does this mean? Does it have anything to do with c++ libraries??? Im using the cross compile environment set up by the ELDK Kit from DENX. Regards Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
8260 configuration
Hi Bo 1. Yes the IMMR needs to be configured at least above 0xC000. The kernel executes code at 0xC000, and an IMMR lower that this will cause the kernel to crash as soon as it starts executing code. I recommend that you stay with the default value 0xF000. 2. The start address is fixed to 0x0 3. ? 4. No, not that I know of. 5. Try getting ELDK from the Denx site. (www.denx.de) -Original Message- From: Yu Bo-BOYU1 [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 02, 2002 3:08 AM To: linuxppc embedded Subject: 8260 configuration I am new to embedded linux but I had good experience in vxWorks. Right now I had a custom 8260 board with SMC1 connected to serial port and FCC3 for fast ethernet. I would like to try running linux on this custom board. I downloaded the latest monta vista preview kit 2.1 as my base release. I had boot code ( with vxWorks and it is based on EST8260 bsp) in my custom board already. I decide to download the linux object via tftp. But I have the following questions: 1. Do I have to configure IMMR as 0xF_ or higher. The default configuration in our boot is 0x0F00_ ? Is this a hard requirement or not ? If so, why can't linux init code do so by writing to IMMR+0x101a8 ? 2. How to specify the start address where linux runs when I build the zImage ? 3. When I make xconfig, what configuration I must have in order to run ? I certainly do not need VGA/HARD DISK/PCI (this board does not have pci devices). 4. Is there any good website/paper/documentation about linux for 8260 platform. 5. Can anyone access ftp.leo.org to get ELDK ? I can ping it but I cannot ftp it today. Thanks. Bo ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
RT-Linux vs RTAI
Hi All Can anyone explain the difference between RT-Linux and the RTAI patches available from the Denx site...? Is there a difference? Thanks in advance Flavio Pereira ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Simple drivers....denx ftp
Hi All Can someone please e-mail the DENX example drivers that are available whose sources can be found on: ftp://ftp.denx.de/pub/LinuxPPC/usr/src/drivers.tar.gz I'm having trouble accessing the ftp site for a few days now... Thanks in advance Flavio ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on 8260 using ELDK..Help?!?
Hi Wolfgang I recommend to return to the original code, and get this working. You can probably use the driver in our CVS as reference; we fixed a couple of issues for example in the area of BRG assignment. I have returned to the original uart.c. Although it still kills my serial port it has nothing to do with the unable to open initial console. Will the original uart.c I still get logging in /var/log/messages and I can see it is still doing the same thing. Yes, uart.c is probably something that I will still have to look at, but it is not the root cause of my original problem. Any more suggestions would be appreciated since I feel I've hit the brick wall quite severely now. Besides file permissions (which Im conviced are fine now) what else could cause the kernel to not be able to open a console? Regards Flavio ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on 8260 using ELDK..Help?!?
Hi Pete Yes, both the read and write permissions are enabled for console and tty0 in dev... Flavio -Original Message- From: Pete McCormick [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 04, 2002 4:40 PM To: Flavio Pereira Cc: linuxppc-embedded at lists.linuxppc.org Subject: RE: Linux on 8260 using ELDK..Help?!? Flavio, What do your file permissions look like on /dev/ttyS0? Do you have read and write access enabled? Pete P.S. I am also using the linux 2.4.18 kernel on the MPC8260ADS board, so I might be able to help on further issues... --- Flavio Pereira fpereira at azisa.com wrote: Hi Wolfgang Firstly let me say thanks for your response. Did you fix the IMMR mapping in PPCBoot? The CFG_DEFAULT_IMMR defi- nition will NOT work with LInux; see the Linux memory map require- ments - You _must_ map the IMMR at 0xF000 or above. Yes I have fixed to IMMR mappings in PPCBoot to correspond to 0xF000 Are you sure this was done well? Well _no_ I'm not sure this was done well but I can tell you exactly what I have done. For uart.c I've completely removed SMC1 and SMC2 from serial_state rs_table and rs_brg_map[]. If I don't remove this my serial port does not come up at all initially. For tty_io.c I simply to do not call rs_8xx_init because it kills my serial port, i.e. if I let it this code execute there is no more output on my serial terminal. Did you run the ELDK_MAKEDEV and ELDK_FIXPERM scripts as documented? I've run ELDK_MAKEDEV, so the dev/console file does exist and I've also run ELDK_FIXOWNER. I'm guessing that FIXOWNER = FIXPERM. Also in my var\log\messages I get the following...so init is trying to execute: Dec 31 19:00:13 192 kernel: Warning: unable to open an initial console. Dec 31 19:00:13 192 /sbin/mingetty[133]: /dev/ttyS0: Operation not permitted Dec 31 19:00:06 192 rc.sysinit: Mounting proc filesystem: succeeded Dec 31 19:00:06 192 sysctl: net.ipv4.ip_forward = 0 Dec 31 19:00:06 192 sysctl: net.ipv4.conf.all.rp_filter = 1 Dec 31 19:00:07 192 sysctl: error: 'net.ipv4.ip_always_defrag' is an unknown key Dec 31 19:00:07 192 sysctl: error: 'kernel.sysrq' is an unknown key Dec 31 19:00:07 192 rc.sysinit: Configuring kernel parameters: succeeded Dec 31 19:00:07 192 date: Wed Dec 31 19:00:06 EST 1969 Dec 31 19:00:07 192 rc.sysinit: Setting clock : Wed Dec 31 19:00:06 EST 1969 succeeded Dec 31 19:00:07 192 swapon: swapon: cannot open /etc/fstab: No such file or directory Dec 31 19:00:07 192 rc.sysinit: Activating swap partitions: failed Dec 31 19:00:07 192 rc.sysinit: Setting hostname 192.168.1.246: succeeded Dec 31 19:00:10 192 rc.sysinit: Checking filesystems succeeded Dec 31 19:00:10 192 fsck: Checking all file systems. Dec 31 19:00:10 192 rc.sysinit: Mounting local filesystems: failed Dec 31 19:00:10 192 fsck: WARNING: couldn't open /etc/fstab: No such file or directory Dec 31 19:00:10 192 mount: can't create lock file /etc/mtab~62: Permission denied (use -n flag to override) Dec 31 19:00:11 192 rc.sysinit: Enabling swap space: succeeded Dec 31 19:00:11 192 init: can't open(/etc/ioctl.save, O_WRONLY): Permission denied Dec 31 19:00:13 192 /sbin/mingetty[134]: /dev/ttyS0: Operation not permitted Dec 31 19:00:11 192 init: Entering runlevel: 3 Dec 31 19:00:14 192 /sbin/mingetty[135]: /dev/ttyS0: Operation not permitted Dec 31 19:00:14 192 /sbin/mingetty[136]: /dev/ttyS0: Operation not permitted Dec 31 19:00:14 192 /sbin/mingetty[137]: /dev/ttyS0: Operation not permitted Dec 31 19:00:14 192 /sbin/mingetty[138]: /dev/ttyS0: Operation not permitted Dec 31 19:00:14 192 /sbin/mingetty[139]: /dev/ttyS0: Operation not permitted Dec 31 19:00:14 192 /sbin/mingetty[140]: /dev/ttyS0: Operation not permitted Regards, Flavio -Original Message- From: Wolfgang Denk [mailto:wd at denx.de] Sent: Wednesday, September 04, 2002 3:41 PM To: Flavio Pereira Cc: linuxppc-embedded at lists.linuxppc.org Subject: Re: Linux on 8260 using ELDK..Help?!? Dear flavio, in message 1E354700654661418593A0D6B5A9D41008943B at mail.azisa.co.za you wrote: I'm a _newbie_ to Linux and am busy porting Linux to a MPC8260ADS board. PPCBoot is working fine and the Linux kernel seems to boot up okay up and till the point where it begins to load init, it then crashes. The trace is shown below. I've also tried forcing sh and Did you fix the IMMR mapping in PPCBoot? The CFG_DEFAULT_IMMR defi- nition will NOT work with LInux; see the Linux memory map require- ments - You _must_ map the IMMR at 0xF000 or above. bash as the start-up but these also fail with similar errors. I'm using the binaries provided by the ELDK development package. Also my changes to the base kernel code (2.4.4) are minimal and are limited to uart.c (force SCC1 as serial port) and tty_io.c (don't call rs_8xx_init). Can anyone please point me in the right direction...? Are you sure this was done well
