Entry | |
---|---|
R0 | Flags: |
Bits 0-31: Reserved (set to 0) | |
R1 | DMA tag |
Exit | |
---|---|
R0 | Number of bytes transferred so far |
- | All other registers preserved |
This SWI is used to return the progress of a DMA transfer, giving the total number of bytes transferred.
An error block is returned if the DMA tag is invalid.