Problem with OPB access on 440GX and Linux 2.6.15

[Gerhard Jaeger]

On Monday 09 October 2006 15:46, powerpc440 wrote:
> Hi everybody,
> 
> I'm having a PPC440GX based board, based on Ocotea.
> On the board is a Xilinx CPLD chip, connected with OPB (On-Chip
> Peripheral Bus).
> Under U-Boot I can communicate – reading and writing, without any
> problems, but when the Linux kernel ones is loaded, then I'm getting
> error message: “Bus error”. This error message appears on reading or
> writing.
> How I can access the units, which are connected with OPB?
> 
> There are the source code from the driver, that I use :
> 
> static void io_addr = ioremap(0x48300000, 0x100000); /* allocate 1MB
> adress space */
> long value = readl(io_addr + 0x7000);
> 
[SNIPSNAP]

Hi,

are you sure the address is correct?
This looks to me like the Ocotea FPGA address minus 0x100000000...
In that case use ioremap64().

HTH
Gerhard

-- 
Gerhard Jaeger <gjaeger at sysgo.com>            
SYSGO AG                      Embedded and Real-Time Software
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