to support the DDR SDRAM using DDR SDRAM spec. I am
facing some problem with that.
Can any send me the DDR SDRAM initialization sample code for reference ,
if you have?
Thanks,
Siva.S
--
sivakumar <[EMAIL PROTECTED]>
wipro
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Linuxbios mailin
On 12 Jan 2003, sivakumar wrote:
> I want to support DDR SDRAM in linuxbios. When was browsing the code, I
> found only the SDRAM support. Also I found from the specification that
> Initialization sequence of DDR SDRAM and SDRAM are different.
DDR is in there, see the 7500 port.
kron
_
On Sun, 2003-01-12 at 18:52, sivakumar wrote:
>
> Can any send me the DDR SDRAM initialization sample code for reference ,
> if you have?
>
Init of DDR SDRAM is not much more difficult than SDR if you get
familiar to the spec. You can read and compare the 630/ipl.S which
support
Thanks for the information.
I have gone through the code and have following query.
Following is the one of the step in Initialization of DDR SDRAM.
-Next a MODE REGISTER SET command should be issued for the Extended
Mode Register to enable the DLL,
/* 5. Issue EMRS to enable DLL */
sivakumar <[EMAIL PROTECTED]> writes:
> Thanks for the information.
>
> I have gone through the code and have following query.
> Following is the one of the step in Initialization of DDR SDRAM.
>
> -Next a MODE REGISTER SET command should be issued for the Extended
> Mode Register to enable the
> except on 430TX, where due to a seeming bug in the chipset you have to
> write :-)
Shh! I don't want to hear about 430TX bugs! :-)
Regards,
Andrew
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On 16 Jan 2003, Eric W. Biederman wrote:
> It is performing a memory read. A memory read in intel chipsets
> when the command register is set properly causes commands to be sent
> to memory. Reads seem to work a little bit more reliably than writes
> in my experience.
>
except on 430TX, where
I'm now working on linux
bios with 82845gv/82801db chipset. When I initialize DDR RAM, It's always hangs.
When I enable NOP command and issue a memory read instruction, It hangs.
Anyone can tell me if I missed something? Any advice would be
appreciated.
Best Regards,
Jianwei
On Mon, 19 Jan 2004, Jia Jianwei wrote:
> I'm now working on linux bios with 82845gv/82801db chipset. When I
> initialize DDR RAM, It's always hangs. When I enable NOP command and
> issue a memory read instruction, It hangs. Anyone can tell me if I
> missed something? Any advice would be app
Thank you very much!
I'm using V1 and have changed a lot to fit our own need.
Jianwei
- Original Message -
From: "ron minnich" <[EMAIL PROTECTED]>
To: "Jia Jianwei" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Monday, January 19,
On Mon, 19 Jan 2004, Jia Jianwei wrote:
> Thank you very much!
> I'm using V1 and have changed a lot to fit our own need.
now you are worrying me ... :-)
what are you changing? If possible we'd like to merge 845 support back
into the tree.
ron
___
L
onday, January 19, 2004 2:29 PM
Subject: Re: 82845GV DDR SDRAM initialization
> On Mon, 19 Jan 2004, Jia Jianwei wrote:
>
> > Thank you very much!
> > I'm using V1 and have changed a lot to fit our own need.
>
> now you are worrying me ... :-)
>
> what are you chan
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