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.
> >
>
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