Joachim, The Xilinx PPC405 core does not have an integrated DMA controller.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joachim Förster Sent: Thursday, April 26, 2007 10:06 AM To: [email protected] Subject: ML403 and PPC4xx_DMA ? Hi all, I have a question regarding the PowerPC 405 Core on the Xilinx ML403 board and DMA . The Linux kernel has an option called CONFIG_PPC4xx_DMA. Do all/some PowerPC 4xx Cores have an integrated DMA Controller? I tried to find some documentation about this DMA Controller in several Xilinx and IBM manuals which cover the PowerPC 405 Core - but I didn't find anything. So, my question is: Does the Virtex-4 FX12 PowerPC 405 Core on the ML403 have such DMA Controller? If yes, is it usable within Linux to transfer data from RAM to a device's hardware buffers (typical task of a DMA controller)? Thanks, Joachim PS: I tried to compile a kernel image with CONFIG_PPC4xx_DMA enabled, but gcc complains about missing definitions in ppc4xx_dma.c ... e.g. DCRN_DMASR (defined in ibm405.h). Well I guess I have to have DCRN_MASR_BASE defined in xparameters_ml403.h .... but defined to what? _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
