What kind of Linux address must I use to set the SAR reg. of the DMA ctrl ?
From: Callebaut Benoit <hidden>
Date: 2003-05-07 06:52:06
Hello, I am writing the code to start a DMA transfer with the built-in DMA controller of the MPC8245. The purpose is to do Memory to PCI transfers. The PCI part seems to be OK ( memory of the device is written) the the source address seems to be wrong since I read 0XFFFFFFFF as data in the device. I tried with bus and physical address (using virt_to_bus & virt_to_phys functions) but this doesn't give good results. So I ask myself which kind of linux address must I use to configure the SAR register of the Dual channel DMA controller ? If It works I will post a patch of my work. Thanks ------------------------------------------------------------------------------ ---- Benoit Callebaut Software Development Engineer Barco | Control Rooms Noordlaan 5, 8520 Kuurne, Belgium Tel +32(0)56 36 84 28 Fax +32(0)56 36 86 05 mailto:benoit.callebaut@barco.com http://www.barcocontrolrooms.com ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/