Hi Pritha,
These are the few things that you might want to look for.
1) Check for the command line argument which is being passed to the kernel, if
that is alright. (I mean to say set the console options to the kernel)
Something which looks like
setenv bootargs=/dev/(nfs/ram???) rw console=(ttyS?),baudrate
2) Try to enable "early debug messages" options in the kernel if available to
debug more.
Hope this helps a bit.
-Soumya
-----Original Message-----
From: linuxppc-embedded-bounces at ozlabs.org [mailto:linuxppc-embedded-bounces
at ozlabs.org] On Behalf Of [EMAIL PROTECTED]
Sent: Thursday, December 01, 2005 5:02 PM
To: linuxppc-embedded at ozlabs.org
Subject: Linuxppc-embedded Digest, Vol 16, Issue 3
Send Linuxppc-embedded mailing list submissions to
linuxppc-embedded at ozlabs.org
To subscribe or unsubscribe via the World Wide Web, visit
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
or, via email, send a message with subject or body 'help' to
linuxppc-embedded-request at ozlabs.org
You can reach the person managing the list at
linuxppc-embedded-owner at ozlabs.org
When replying, please edit your Subject line so it is more specific than "Re:
Contents of Linuxppc-embedded digest..."
Today's Topics:
1. Re: Xilinx_uartlite (T Ziomek)
2. Re:RE: linuxppc-embedded help needed:kernel access of bad
area (zengshuai at sogou.com)
3. RE: Xilinx_uartlite (Jaap de Jong)
4. Re: [PATCH] ibm_emac: fix graceful stop timeout handling
(Jeff Garzik)
5. AW: RE: linuxppc-embedded help needed:kernel access of bad
area (Achim Machura)
6. bus error (zengshuai at sogou.com)
7. porting linux to new board type (Nathael PAJANI)
8. Linux hangs while Uncompressing (pritha.bhattacharya at tcs.com)
----------------------------------------------------------------------
Message: 1
Date: Wed, 30 Nov 2005 19:06:29 -0600 (Central Standard Time)
From: T Ziomek <[EMAIL PROTECTED]>
Subject: Re: Xilinx_uartlite
To: jaap.dejong at nedap.com, linuxppc-embedded
<linuxppc-embedded at ozlabs.org>
Message-ID: <Pine.WNT.4.61.0511301902100.3620 at holyoke.labs.mot.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
> I'm trying to get my avnet virtex4fx12 running with linux.
> It boots, but ends with:
> Warning: unable to open an initial console.
> This means /dev/console was not opened; init is running.
> Since my board has no 16550 uart I must use xilinx_uartlite Part of my
> configuration:
> +--Character devices
> +--Xilinx UART Lite ON
> +--Console on UART Lite port ON
> Any ideas?
/dev/console may not be tied to your UARTLite. If you don't specify the
console on your kernel command line, try adding something along the lines of
"console=ttyS0,19200" to it (with the appropriate device and baud rate of
course).
Tom
--
/"\ ASCII Ribbon Campaign |
\ / | Email to user 'CTZ001'
X Against HTML | at 'email.mot.com'
/ \ in e-mail & news |
------------------------------
Message: 2
Date: Thu, 1 Dec 2005 14:52:01 +0800 (CST)
From: <[EMAIL PROTECTED]>
Subject: Re:RE: linuxppc-embedded help needed:kernel access of bad
area
To: "Fillod Stephane" <stephane.fillod at thomson.net>
Cc: Linuxppc-embedded at ozlabs.org
Message-ID: <5100380.1133419921433.JavaMail.postfix at mx3.mail.sohu.com>
Content-Type: text/plain; charset="ISO-8859-1"
thanks very much.but i'm not going to write a user space program.
this is the detail:
//led-module.c
#ifndef __KERNEL__
#define __KERNEL__
#endif
#ifndef MODULE
#define MODULE
#endif
#include <linux/config.h>
#include <linux/module.h>
MODULE_LICENSE("GPL");
#ifdef CONFIG_SMP
#define __SMP__
#endif
#define CONFIG_TASK_SIZE 0x80000000
#include <asm/processor.h>
#include <linux/init.h>
#include <asm/uaccess.h> /* copy_to_user(), copy_from_user() */ #include
<linux/fs.h> /* struct file_operations, register_chrdev(), ... */ #include
<linux/kernel.h> /* printk()*/ #include <linux/sched.h>
#include "led-module.h"
#define BCSRADDR 0x04500000
static int PQ2FADS_GPL_open (struct inode *inode, struct file *filp); static
ssize_t PQ2FADS_GPL_read (struct file *filp, char *buf, size_t count,loff_t
*f_pos); static ssize_t PQ2FADS_GPL_write (struct file *filp, const char *buf,
size_t count,loff_t *f_pos); static int PQ2FADS_GPL_ioctl (struct inode
*inode,struct file *filp,unsigned int cmd,unsigned long scmd); static int
PQ2FADS_GPL_release (struct inode *inode, struct file *filp);
struct file_operations PQ2FADS_GPL_fops = {
open: PQ2FADS_GPL_open,
release: PQ2FADS_GPL_release,
ioctl: PQ2FADS_GPL_ioctl,
read: PQ2FADS_GPL_read,
write: PQ2FADS_GPL_write,
};
static int PQ2FADS_GPL_major;
static int PQ2FADS_GPL_state;
static volatile PQ2FADS_BCSR *PQ2FADS_GPL_CSR=0;
static int init_module(void)
{
printk ("This' a PQ2FADS_ZU board GPL LED Device File!\n");
PQ2FADS_GPL_major = register_chrdev (0, "GPL LED Device",
&PQ2FADS_GPL_fops);
if (PQ2FADS_GPL_major < 0)
{
printk("error1");
return PQ2FADS_GPL_major;
}
printk ("The major is:%d\n", PQ2FADS_GPL_major);
return 0;
}
static void cleanup_module(void)
{
unregister_chrdev(PQ2FADS_GPL_major, "GPL LED Device");
printk("PQ2FADS_ZU board GPL LED Device has been removed! bye!\n"); }
static int PQ2FADS_GPL_open(struct inode *inode,struct file *filp) {
PQ2FADS_GPL_CSR=(PQ2FADS_BCSR*)BCSRADDR;
printk("open %s...OK!\n ", current->comm);
return 0;
}
static int PQ2FADS_GPL_release(struct inode *inode,struct file *filp) {
printk("close....OK!\n ");
return 0;
}
static ssize_t PQ2FADS_GPL_read(struct file *filp,char *buf,size_t count,loff_t
*f_pos) {
// char ledopen[20]="led is open.";
// char ledclose[20]="led is close.";
// count=20;
if(((PQ2FADS_GPL_CSR->bcsr0) & 0x02000000) == 0x0) printk("led is
open");
// else copy_to_user(buf,ledclose,20);
return count;
}
static ssize_t PQ2FADS_GPL_write(struct file *filp,const char *buf,size_t
count,loff_t *f_pos) {
PQ2FADS_GPL_CSR->bcsr0 |=0x02000000;
return 0;
}
static int PQ2FADS_GPL_ioctl(struct inode *inode,struct file *filp,unsigned int
cmd,unsigned long scmd) {
return 0;
}
//led-app.c
#include <stdio.h>
int main(void)
{
int mydev,err;
char resultchar[20]="begin...";
mydev=open("/dev/PQ2FADS_GPL","rb+");
if(mydev<0)
{
printf("open error.\n");
return 1;
}
err=read(mydev,resultchar,20);
if(err !=20) printf("read1 error!\n");
printf("read1=%s",resultchar);
err=write(mydev,resultchar,20);
if(err !=0) printf("write error!\n");
err=read(mydev,resultchar,20);
if(err !=20) printf("read2 error!\n");
printf("read2=%s",resultchar);
return 0;
}
i got led-module.o and led-app.exe
i insmod led-module.o
mknod /dev/PQ2FADS_GPL
and when i run led-app.exe
show:
# ./led-app.exe
open led-app.exe...OK!
Oops: kernel access of bad area, sig: 11
NIP: C30B11B4 XER: 00000000 LR: C003A310 SP: C06B1F00 REGS: c06b1e50 TRAP: 0300
Not tainted
MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 04500000, DSISR: 20000000
TASK = c06b0000[201] 'led-app.exe' Last syscall: 3 last math c06b0000 last
altivec 00000000
GPR00: C003A310 C06B1F00 C06B0000 C01A5AA0 7FFFFDE0 00000014 C01A5AC0 00000000
GPR08: 00000000 04500000 0000000C C01A0000 30025CE8 10018B5C 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 00009032 006B1F40 00000000 C0003E88
GPR24: C0003BE0 00000001 10000500 7FFFFEA4 7FFFFDE0 FFFFFFEA C01A5AA0 00000014
Call backtrace:
10000A1C C003A310 C0003C3C 100004AC 0FEC6D74 00000000 Segmentation fault # as
you know,i am really a new gay.help me please.
----- Original Message -----
From: Fillod Stephane
To: zengshuai at sogou.com ;ppc
Subject: RE: linuxppc-embedded help needed:kernel access of bad area
Sent: Wed Nov 30 17:33:25 CST 2005
> Dear zengshuai,
>
> zengshuai at sogou.com wrote:
> > i writed a led driver for PQ2FADS(a ppc board).
> > but i can't read/write 0x04500000 where led register addr locate in.
> > i tested two ways to do that.
> > first,
> > p=0x04500000;
> > *p=0x12;
> > ....
> > second,
> > outb(0x12,0x04500000);
> > ...
> > two ways both didn't work.they had a some wrong:kernel access of bad
> area.
> > how can i know which area is bad area or good area?
> > and what can i do next? thanks.
>
> Do yourself a favor, read a book about Linux device driver
> development, for example one listed[1] in the excellent Denx's DLUG FAQ[2].
> Getting some training on PowerPC development is a good idea too.
> [1] http://www.denx.de/wiki/view/DULG/MoreInformationBooks
> [2] http://www.denx.de/wiki/DULG/Manual
>
> Peruse also your chip data-sheet, and you will see that outb() is
> non-sense.
>
> If you are accessing the led register from kernel space, you'll find a
> solution using ioremap(). Otherwise, if you are accessing the led
> register from user space, this link[3] will help you, or this shorter
> one[4].
> You can follow this thread[5] for more information.
>
> [3]
> http://www.denx.de/twiki/bin/view/PPCEmbedded/DeviceDrivers#Section_Ac
> ce
> ssingPeripheralsFromUserSpace
> [4] http://tinyurl.com/6c7th
> [5] http://lists.linuxppc.org/linuxppc-embedded/200403/msg00059.html
>
> Please next time, do ourselves a favor, try some searching first
> (google, whatever). Your question is a FAQ.
>
> Regards,
> --
> Stephane
>
------------------------------
?????Sogou.com?2G??????????!
http://mail.sogou.com/recommend/sogoumail_invite_reg1.jsp?from=sogouinvitation&s_EMAIL=zengshuai%40sogou.com&username=&FullName=&Email=&verify=e197bd6dbd1fc7f8d6a035729df08d63
------------------------------
Message: 3
Date: Thu, 1 Dec 2005 08:13:11 +0100
From: "Jaap de Jong" <[EMAIL PROTECTED]>
Subject: RE: Xilinx_uartlite
To: "T Ziomek" <ctz001 at email.mot.com>, "linuxppc-embedded"
<linuxppc-embedded at ozlabs.org>
Message-ID:
<6915D0AE8B9047438F320B466AE30FDD324CCD at nvs0003.nedap.local>
Content-Type: text/plain; charset="us-ascii"
Hi Tom,
Thanks for your reply, but then I only get:
Now booting the kernel
Beste regards,
Jaap
-----Oorspronkelijk bericht-----
Van: T Ziomek [mailto:ctz001 at email.mot.com]
Verzonden: donderdag 1 december 2005 02:06
Aan: Jaap de Jong; linuxppc-embedded
Onderwerp: Re: Xilinx_uartlite
> I'm trying to get my avnet virtex4fx12 running with linux.
> It boots, but ends with:
> Warning: unable to open an initial console.
> This means /dev/console was not opened; init is running.
> Since my board has no 16550 uart I must use xilinx_uartlite Part of my
> configuration:
> +--Character devices
> +--Xilinx UART Lite ON
> +--Console on UART Lite port ON
> Any ideas?
/dev/console may not be tied to your UARTLite. If you don't specify the
console on your kernel command line, try adding something along the
lines of "console=ttyS0,19200" to it (with the appropriate device and
baud rate of course).
Tom
--
/"\ ASCII Ribbon Campaign |
\ / | Email to user 'CTZ001'
X Against HTML | at 'email.mot.com'
/ \ in e-mail & news |
------------------------------
Message: 4
Date: Thu, 01 Dec 2005 02:23:42 -0500
From: Jeff Garzik <[EMAIL PROTECTED]>
Subject: Re: [PATCH] ibm_emac: fix graceful stop timeout handling
To: Eugene Surovegin <ebs at ebshome.net>
Cc: netdev at vger.kernel.org, linuxppc-embedded at ozlabs.org
Message-ID: <438EA4FE.8010903 at pobox.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
applied
------------------------------
Message: 5
Date: Thu, 1 Dec 2005 09:00:41 +0100
From: "Achim Machura" <[EMAIL PROTECTED]>
Subject: AW: RE: linuxppc-embedded help needed:kernel access of bad
area
To: <zengshuai at sogou.com>
Cc: "Linuxppc-Embedded \(E-Mail\)" <linuxppc-embedded at ozlabs.org>
Message-ID: <000001c5f64d$538113d0$34f1ff0a at beint.local>
Content-Type: text/plain; charset="iso-8859-1"
Hello,
> #define BCSRADDR 0x04500000
>
...
> static int PQ2FADS_GPL_open(struct inode *inode,struct file *filp)
> {
> PQ2FADS_GPL_CSR=(PQ2FADS_BCSR*)BCSRADDR;
possible you have to change physical address to logical see ioremap.
achim
------------------------------
Message: 6
Date: Thu, 1 Dec 2005 16:37:43 +0800 (CST)
From: <[EMAIL PROTECTED]>
Subject: bus error
To: "ppc" <linuxppc-embedded at ozlabs.org>
Message-ID:
<13090422.1133426263198.JavaMail.postfix at mx3.mail.sohu.com>
Content-Type: text/plain; charset="GB2312"
//test.c
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
int main(void)
{
static volatile char *reg_mem;
static int axs_mem_fd = -1;
axs_mem_fd = open("/dev/mem", O_RDWR|O_SYNC);
if (axs_mem_fd < 0) {
perror("AXS: can't open /dev/mem");
return NULL;
}
/* memory map */
reg_mem =(volatile char*)mmap(
(caddr_t)reg_mem,
0x4,
PROT_READ|PROT_WRITE,
MAP_SHARED,
axs_mem_fd,
0x04600000
);
if(reg_mem[0]==0x10) printf("OK");
else printf("sorry");
}
host:
ppc_6xx-gcc -o test test.c
target:
./test
Bus error
need help,thanks
------------------------------
??????????Sogou.com??2G????????????????????!
http://mail.sogou.com/recommend/sogoumail_invite_reg1.jsp?from=sogouinvitation&s_EMAIL=zengshuai%40sogou.com&username=linuxppc-embedded&FullName=linuxppc-embedded&Email=linuxppc-embedded%40ozlabs.org&verify=755eff4e640bdcfc57d93cbd8b0a9cb7
------------------------------
Message: 7
Date: Thu, 01 Dec 2005 12:30:54 +0100
From: Nathael PAJANI <[EMAIL PROTECTED]>
Subject: porting linux to new board type
To: linuxppc-embedded at ozlabs.org
Message-ID: <438EDEEE.2000000 at cpe.fr>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi!
I stepped over your message without noticing, do you still need help?
I do not have much experience yet, as I've been graduated only two month
ago, but my job actualy is porting linux to custom boards, and I
achieved my first one two weeks ago.
So maybe I can hand out some usefull clues.
Have fun :)
+++
------------------------------
Message: 8
Date: Thu, 1 Dec 2005 15:29:10 +0530
From: [EMAIL PROTECTED]
Subject: Linux hangs while Uncompressing
To: linuxppc-embedded <linuxppc-embedded at ozlabs.org>
Message-ID:
<OF0098DF7F.857DE409-ON652570CA.001AA3F7-652570CA.0036DB32 at tcs.com>
Content-Type: text/plain; charset="us-ascii"
Hi All,
I have RAM version of U-Boot which is running on a board similar to
MPC8260. My memory map isas follows:
Staring address Device Size Memory
controller and CS
0000 0000
0800 0000
FFF0 0000
0F00 0000
3000 0000
3800 0000
4200 0000
5000 0000
FLASH (Boot)
FLASH (Code)
SSRAM
CPU internal registers
SDRAM
SDRAM
Framer
DSP 8102
1MB (512Kx16)
4 MB (1Mx16)
2 MB (512Kx36)
128 KB
128 MB (16Mx72)
128 MB (16Mx72)
1 MB
2 MB
BR0/OR0: CS0
BR1/OR1: CS1
BR2/OR2: CS2
BR3/OR3: CS3
BR4/OR4: CS4
BR5/OR5: CS5
BR6/OR6: CS6
I have downloaded Linux 2.4.25 kernel image through kermit. after
downloading the image in SDRAM location 0x30000000 and giving the command
bootm 0x30000000
the prompt shows a message:
TCS-PIC-UBOOT=> loadb 0x30000000## Ready for binary (kermit) download to
0x30000000 at 57600 bps...
## Total Size = 0x000936f6 = 603894 Bytes
## Start Addr = 0x30000000
TCS-PIC-UBOOT=> bootm 0x30000000## Booting image at 30000000 ...
Image Name: Linux-2.4.25
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 603830 Bytes = 589.7 kB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ...
The system hangs here and is not able to uncompress the kernel any
further. I have checked in the FAQs provided in the denx's site, but could
not find anything similar to my case.
I would appreciate any help.
Thanks & Regards,
Pritha Bhattacharya
Tata Consultancy Services Limited
Mailto: pritha.bhattacharya at tcs.com
Website: http://www.tcs.com
Notice: The information contained in this e-mail message and/or attachments to
it may contain confidential or privileged information. If you are not the
intended recipient, any dissemination, use, review, distribution, printing or
copying of the information contained in this e-mail message and/or attachments
to it are strictly prohibited. If you have received this communication in
error, please notify us by reply e-mail or telephone and immediately and
permanently delete the message and any attachments. Thank you
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20051201/f2efec47/attachment.htm
------------------------------
_______________________________________________
Linuxppc-embedded mailing list
Linuxppc-embedded at ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
End of Linuxppc-embedded Digest, Vol 16, Issue 3
************************************************
