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Subject: RE: Cougar memory
Date: Fri, 18 May 2007 09:25:26 -0700
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E02FB254D@onstor-exch02.onstor.net>
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Thread-Topic: Cougar memory
Thread-Index: AceXTCUHh0M0H9YDS4GgvP8uu+752ABsSeegAASqM7AAFaMo4AAAqJAn
References: <BB375AF679D4A34E9CA8DFA650E2B04E03B6ED53@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E03C0C444@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E02FB254C@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E03C0C544@onstor-exch02.onstor.net>
From: "Bill Nadzam" <bill.nadzam@onstor.com>
To: "Maxim Kozlovsky" <maxim.kozlovsky@onstor.com>,
	"Brian Stark" <brian.stark@onstor.com>
Cc: "dl-Cougar" <dl-Cougar@onstor.com>

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Well Max.
the question I had was about the way the FC accesses memory today.
We are required to use a special address space for un-cached reads.
If you feel there is a better way than Brian suggests, thats fine with =
me.
I have not a problem and will do whatever you suggest.
As long as it works, I am fine with this.
=20

________________________________

From: Maxim Kozlovsky
Sent: Fri 5/18/2007 9:07 AM
To: Bill Nadzam; Brian Stark
Cc: dl-Cougar
Subject: RE: Cougar memory



Why spend TLB entries? Just use the XKSEG mappings.

=20

________________________________

From: Bill Nadzam=20
Sent: Thursday, May 17, 2007 10:47 PM
To: Brian Stark
Cc: dl-Cougar
Subject: RE: Cougar memory

=20

This is great news!

Thanks.

=20

________________________________

From: Brian Stark
Sent: Thu 5/17/2007 8:38 PM
To: Bill Nadzam
Subject: RE: Cougar memory

Bill,

=20

This will be the same on Cougar and won't be an issue for the SiBytes.  =
For reading memory that was written by the QLogic, the SiByte will use =
TLB entries that point to uncached memory space. =20

=20

=20

Brian

=20

	=20

=09
________________________________


	From: Bill Nadzam=20
	Sent: Tuesday, May 15, 2007 4:53 PM
	To: Brian Stark
	Subject: Cougar memory

	In the Cheetah and Bobcat we had to use special addressing for uncached =
memory space.

	This would be done whenever we read memory that was written by the =
QLogic part.

	=20

	Is this a problem for the Cougar?


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<DIV dir=3Dltr><FONT face=3DArial color=3D#000000 size=3D2>Well =
Max.</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial size=3D2>the question I had was about =
the way the FC accesses memory today.</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial size=3D2>We are required to use a =
special address space for un-cached reads.</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial size=3D2>If you feel there is a better =
way than Brian suggests, thats fine with me.</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial size=3D2>I have not a problem and will =
do whatever you suggest.</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial size=3D2>As long as it works, I am =
fine with this.</FONT></DIV>=0A=
<DIV dir=3Dltr>&nbsp;</DIV></DIV>=0A=
<DIV dir=3Dltr><BR>=0A=
<HR tabIndex=3D-1>=0A=
<FONT face=3DTahoma size=3D2><B>From:</B> Maxim =
Kozlovsky<BR><B>Sent:</B> Fri 5/18/2007 9:07 AM<BR><B>To:</B> Bill =
Nadzam; Brian Stark<BR><B>Cc:</B> dl-Cougar<BR><B>Subject:</B> RE: =
Cougar memory<BR></FONT><BR></DIV>=0A=
<DIV>=0A=
<DIV class=3DSection1>=0A=
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Why spend TLB =
entries? Just use the XKSEG mappings.</SPAN></FONT></P>=0A=
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>=0A=
<DIV>=0A=
<DIV class=3DMsoNormal style=3D"TEXT-ALIGN: center" align=3Dcenter><FONT =
face=3D"Times New Roman" size=3D3><SPAN style=3D"FONT-SIZE: 12pt">=0A=
<HR tabIndex=3D-1 align=3Dcenter width=3D"100%" SIZE=3D2>=0A=
</SPAN></FONT></DIV>=0A=
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D2><SPAN =
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">From:</SPAN></FONT></B><FONT face=3DTahoma size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Bill Nadzam <BR><B><SPAN =
style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, May 17, 2007 =
10:47 PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> Brian =
Stark<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Cc:</SPAN></B> =
dl-Cougar<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> =
RE: Cougar memory</SPAN></FONT></P></DIV>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>=0A=
<DIV id=3DidOWAReplyText99751>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3DArial color=3Dblack size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">This is =
great news!</SPAN></FONT></P></DIV>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Thanks.</SPAN></FONT></P></DIV></DIV>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>=0A=
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</SPAN></FONT></DIV>=0A=
<P class=3DMsoNormal style=3D"MARGIN-BOTTOM: 12pt"><B><FONT =
face=3DTahoma size=3D2><SPAN style=3D"FONT-WEIGHT: bold; FONT-SIZE: =
10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=3DTahoma =
size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Brian =
Stark<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Thu =
5/17/2007 8:38 PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> =
Bill Nadzam<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> =
RE: Cougar memory</SPAN></FONT></P></DIV>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3DArial color=3Dblue size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: =
Arial">Bill,</SPAN></FONT></P>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>=0A=
<P class=3DMsoNormal><FONT face=3DArial color=3Dblue size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">This will be =
the same on Cougar and won't be an issue for the SiBytes.&nbsp; For =
reading memory that was written by the QLogic, the SiByte will =
use&nbsp;TLB entries that point to uncached memory space. =
&nbsp;</SPAN></FONT></P>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>=0A=
<P class=3DMsoNormal><FONT face=3DArial color=3Dblue size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: =
Arial">Brian</SPAN></FONT></P>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>=0A=
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<HR tabIndex=3D-1 align=3Dcenter width=3D"100%" SIZE=3D2>=0A=
</SPAN></FONT></DIV>=0A=
<P class=3DMsoNormal style=3D"MARGIN-BOTTOM: 12pt"><B><FONT =
face=3DTahoma size=3D2><SPAN style=3D"FONT-WEIGHT: bold; FONT-SIZE: =
10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=3DTahoma =
size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Bill =
Nadzam <BR><B><SPAN style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> =
Tuesday, May 15, 2007 4:53 PM<BR><B><SPAN style=3D"FONT-WEIGHT: =
bold">To:</SPAN></B> Brian Stark<BR><B><SPAN style=3D"FONT-WEIGHT: =
bold">Subject:</SPAN></B> Cougar memory</SPAN></FONT></P>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">In the Cheetah and Bobcat =
we had to use special addressing for uncached memory =
space.</SPAN></FONT></P></DIV>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">This would be done =
whenever we read memory that was written by the QLogic =
part.</SPAN></FONT></P></DIV>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN =
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P></DIV>=0A=
<DIV>=0A=
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN =
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Is this a problem for the =
Cougar?</SPAN></FONT></P></DIV></BLOCKQUOTE></DIV></DIV></DIV></BODY></HT=
ML>
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