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From: "Joachim Förster" <mls.JOFT@gmx.de>
To: linuxppc-embedded@ozlabs.org
Subject: ML403 and PPC4xx_DMA ?
Date: Thu, 26 Apr 2007 18:06:26 +0200	[thread overview]
Message-ID: <1177603586.5532.20.camel@localhost> (raw)

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?

             reply	other threads:[~2007-04-26 16:06 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-26 16:06 Joachim Förster [this message]
2007-04-26 19:51 ` ML403 and PPC4xx_DMA ? rvk
2007-04-26 21:36 ` Rick Moleres

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