From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3C21A301.2080204@elsoft.ch> Date: Thu, 20 Dec 2001 09:36:17 +0100 From: "David =?ISO-8859-1?Q?M=FCller?= (ELSOFT AG)" MIME-Version: 1.0 To: Adrian Cox Cc: linuxppc-dev@lists.linuxppc.org Subject: Re: ISA DMA References: <3C206A41.1080501@humboldt.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Hi Seems like you are facing the same problem as i do. But IIRC i think you have to adjust the code in include/asm/dma.h (and possibly other places) as well (at least in 2.4.14, not sure about the later kernels). BTW: What south bridge do you use? Some of the newer ones offer 32bit addressing capability for DMA. Adrian Cox wrote: > The current 2.4-devel tree never assigns any memory to the ISA DMA zone, > irrespective of the setting of ISA_DMA_THRESHOLD. As I'm currently > trying to get a floppy working on a platform with 24-bit ISA DMA in its > Southbridge, this looks like a problem. > > How do people feel about the attached patch? This should only change > behavior for platforms which set ISA_DMA_THRESHOLD to a value other than > 0 or (-1)L. > [stuff deleted] Dave ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/