Hello Raja,

We too are working on customized board with amcc 440SPe processor & xilinx System Ace controller. The System Ace controller is connected to compact flash driver.
We use u-boot 1.1.2 as bootloader & linux kernel - 2.6.16-2.

System ace is connected to amcc440SPE processor via GPIO and External Peripheral Bus Controller(EBC).

While booting the linux, it crashes when i am trying to access(read/write) a system ace register.
In the u-boot though i have support, as of now  i am not doing anything with system ace as it not required now.
In u-boot/include/configs/custom_board.h, i could see
#define CFG_ACE_BASE        0xe0000000          /* Xilinx ACE controller - Compact Flash */
 So i have used this address in Linux driver to to ioremap to access the  ace registers. Though i could do ioremap,  it crashes while booting exactly when it is trying the access any ace register.

I doubt with the address i have used . But could not get any clue from the docs given.

I want to know how to access the system ace registers and how to  get the address to ioremap. Please let me know if any details required and also if i am missing any fundamentals.


Thanks & Regards
Sudheer




sudheer wrote: 
Hi Ameet,

Firstly, thanks for the mail.

I am able to compile the linux-2.6.16 and got the ace support files with 
the patch.
While compiling got some errors with  xparameters, but am rectify  them.

I need to wait for the hardware to test the source.

Thanks & Regards
Sudheer


Ameet Patil wrote:
  
Hi Sudheer,
   Frank has already answered your questions. If you have any problems 
with the SysAce patch... do let me know. I have written a small 
tutorial here if it helps...

http://linux.get2knowmore.com


-Ameet

sudheer wrote:
    
Hello Ameet Patil

I am looking for linux kernel source 2.6.16 with system ace 
controller support. I downloaded the linux-2.6.16 and linux-2.6.17-1 
source from kernel.org but could not find any files related to system 
ace controller  ( No xilinx_sysace directory in  drivers/block/) .  I 
have checked penguinppc.org also but could not get it.

Can you please send to me the link where i could download the 
linuxppc-2.6.16 source with system ace support.

Thanks & Regards
Sudheer

Ameet Patil wrote:
      
Hi Raja,
    I have ported the Xilinx System ACE driver to 2.6 kernel. Find 
the latest one here:
http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/patches/linuxppc-2.6.17.1-sysace-1.2.patch 


NOTE: this patch wouldn't work if you are using the TEMAC driver. In 
which case use the -after-TEMAC patch found in the patches folder 
above.

Check the following discussions (threads) for more details:
1. "Xilinx SystemACE driver for 2.6"
2. "Xilinx BSP for linux 2.6"
3. "Kernel hangs after "Now booting the kernel"."

cheers,
-Ameet

Raja Chidambaram wrote:
 
        
 Hi all,
 We are working on customized board with amcc 440SPe
processor & xilinx System Ace controller. The System
Ace controller is connected to compact flash driver.

We use u-boot 1.2 as bootloader & linux kernel
2.6.16-2.

On the process the u-boot is able to detect compact
flash through Xilinx SystemAce controller & able to
load the kernel image into compact flash.But when the
linux boot's up it not able to detect the System Ace
controller or compact flash.

Note:we need to have the root file system in compact
flash.

Is their any drivers available for SystemAce
controller on linux 2.6,if their how to get it.please
help me in this
                                    with regards
                                     raja



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