Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 16 Jun 2009 09:28:14 -0500

Hi Liu Ping,

On Tuesday 16 June 2009 03:39:57 Michael Abbott wrote:
> However, the problem is nothing to do with the 8401...

I agree with Michael, this is not a problem with the 8401 driver and it may 
not be one with the 8002 driver either.

Is this the first time you have tried to use a card that responds in the VME 
A32 space?  If so I would guess that the problem is that your vxWorks BSP 
needs to be configured to map the relevent portion of VME A32 space into the 
CPU's memory map.  The error message is occurring because the driver is 
asking the vxWorks BSP to give it the CPU address corresponding to a 
particular VME A32 address, but the BSP is replying that there is no such CPU 
address because the BSP is not configuring the VME Bridge chip with any A32 
Master windows that cover that range.

Read the target.txt file in your target/config/<bsp> directory, it should 
document the window mappings.  Look for the VME_A32_MSTR_BUS and 
VME_A32_MSTR_SIZE variables; you may be able to just modify them and rebuild 
the BSP, but don't just make the window as large as possible because that can 
significantly slow down the startup of the vxWorks image at boot time and 
also use up memory in MMU page tables.

I can't give you any specific advice because I don't know what VME CPU board 
you are using, and I only know about a limited number of BSPs anyway.

- Andrew
-- 
The best FOSS code is written to be read by other humans -- Harold Welte

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System