• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 98 subscribers
  • Views 348 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SDMA causes system to crash when copying data > 4K bytes

tamo2
Expert 1670 points
Other Parts Discussed in Thread: DM3730

I am trying to make SDMA to work on Linux 3.0/DM3730.

I have tried the simplest memory copy (Element size = BYTE, non-burst, non-packed, single frame).  It works when the size of the data is 1K Bytes, but if I try to copy larger size, say 4K bytes, then system dies.

Can anybody help me?

Thanks!

1106.slaDmaSample.cpp

  • 0
    Guru 31670 points

    Tamo,

    Are you allocating the requirement memory from CMEM?

    Also It might be because of scattered physical pages in the memory, even though the virtual addresses are contiguous. Check the physical address of the address (src + 4k) and compare with the physical address of  src. Do the same comparison for destination address also.

  • 0 in reply to Renjith Thomas
    Expert 1670 points

    Renjith Thomas said:

    Also It might be because of scattered physical pages in the memory, even though the virtual addresses are contiguous. Check the physical address of the address (src + 4k) and compare with the physical address of  src. Do the same comparison for destination address also.

    I wasn't allocating from CMEM.  This makes perfect sense!  
    Thanks for the quick response!