disk controllers w/ 64-bit addressing?

[Dave Feustel]

64-bit memory addressing for disk transfers can be done iin AMD native mode
via programmed i/o. The question is whether 64-bit memory addressing via
dma-controlled memory transfers is possible and/or supported via the disk driver.

On Wednesday 26 November 2003 02:33 am, James Van Artsdalen wrote:
> This is not exactly an authoritative or complete answer from
> HighPoint, but it does suggest there's hope for an (relative to SCSI)
> economic means of a disk system that doesn't need bounce buffers.
>
> Does anyone in FreeBSD already have a contact at HighPoint or should
> I nag them to cough up a datasheet for whatever IC is used?
>
> The pictures show eight SATA ports and one control IC with no
> ATA-to-SATA adapter chips in sight, so this probably isn't one of the
> chips listed on their site but rather something new.
>
> Date: Wed, 26 Nov 2003 14:48:43 +0800
> To: James Van Artsdalen
> From: "HighPoint Technologies Inc." <support at highpoint-tech.com>
> Subject: Re: RocketRaid 1820
>
> Dear Sir / Madam,
>
> Thanks for your contacting us!
> The current driver for RR1820 only can work on the 32-bit OS.
>
> If you use the 32bit OS on Opteron, RR1820 can work properly, for Memory
> Addressing, it is determined by the operating system directly.
>
> The 64bit-driver(Support 64bit OS) will support 64bit addressing, but it
> hasn't released yet.
>
> Regards,
> HighPoint Technologies Inc.
>
> At 04:13 2003-11-26, you wrote:
> >Is the datasheet on the controller for the 1820 available?
> >
> >Can the 1820 address memory above 4 GB (i.e., Opteron)?
> >
> >I can see that the 1820 does 64-bit data: the question is if it does
> >64-bit addresses too.
>
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