Thanks for the data points, Alex.
I'm using U-Boot 1.1.1 and vanilla kernel.org 2.6.11.4 (actually now
2.6.11.5). My BCSR_ADDR looks the same as what you've listed below, so
I'd guess the difference is with U-Boot... (Another engineer here
installed U-Boot on my board, from, I believe, a binary copy he got from
a Freescale(?) CD... I didn't build U-Boot from source... That's
something I'll need to take a look at...)
Mike, have you discovered anything further about your problem?
Walt
On Tue, 2005-03-29 at 08:29 +0200, Bastos Fernandez Alexandre wrote:
> Hi,
>
> >From "linux/arch/ppc/platforms/pq2ads.h"
> #define BCSR_ADDR ((uint) 0xf4500000)
> >From "u-boot/include/configs/MPC8260ADS.h"
> #define CFG_BCSR 0xF4500000
> So ...
> Which version of u-boot and/or linux tree are you using?
> With linuxppc-2.5 and u-boot 1.2 everything works fine for me.
> Maybe Mike's problem is other. Maybe not. :-)
>
> Best regards,
> Alex
>
> > -----Original Message-----
> > From: Walter L. Wimer III [SMTP:walt.wimer at timesys.com]
> > Sent: Monday, March 28, 2005 6:07 PM
> > To: Mike Rapoport
> > Cc: linuxppc-embedded at ozlabs.org
> > Subject: Re: Problem running Linux 2.6.11 on MPC8272ADS
> >
> >
> > Hi Mike,
> >
> > I had the same "hang" experience. The file arch/ppc/platforms/pq2ads.c
> > contains the following function:
> >
> > void __init
> > m82xx_board_setup(void)
> > {
> > /* Enable the 2nd UART port */
> > *(volatile uint *)(BCSR_ADDR + 4) &= ~BCSR1_RS232_EN2;
> > }
> >
> >
> > I had to ifdef-out the assignment statement above. It appears that the
> > definition for BCSR_ADDR in the kernel code differs from what U-Boot is
> > using, and that area of memory isn't properly mapped into the kernel
> > address space this early in the boot sequence. As a result, I was
> > getting an Oops() before the console was even enabled (I could see the
> > Oops message by examining the kernel's printk log buffer using a
> > BDI-2000 hardware debugger).
> >
> >
> >
> > Good luck,
> >
> > Walt Wimer
> > TimeSys Corporation
> >
> >
> >
> >
> > On Sun, 2005-03-27 at 11:31 +0200, Mike Rapoport wrote:
> > > Hi,
> > > I'm trying to bring up the Linux 2.6.11 on MPC8272ADS and it seem to
> > > hang up at the very beginning.
> > > I use ads8272_defconfig and then enable console on SCC:
> > >
> > > CONFIG_SERIAL_CPM=y
> > > CONFIG_SERIAL_CPM_CONSOLE=y
> > > CONFIG_SERIAL_CPM_SCC1=y
> > >
> > >
> > > when I boot the kernel from the u-boot the system hangs up right after
> > > the kernel decompression.
> > >
> >
> > _______________________________________________
> > Linuxppc-embedded mailing list
> > Linuxppc-embedded at ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
