From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by oss.sgi.com id ; Fri, 28 Jan 2000 14:54:56 -0800 Received: from deliverator.sgi.com ([204.94.214.10]:9542 "EHLO deliverator.sgi.com") by oss.sgi.com with ESMTP id ; Fri, 28 Jan 2000 14:54:36 -0800 Received: from cthulhu.engr.sgi.com (cthulhu.engr.sgi.com [192.26.80.2]) by deliverator.sgi.com (980309.SGI.8.8.8-aspam-6.2/980310.SGI-aspam) via ESMTP id OAA10463; Fri, 28 Jan 2000 14:52:50 -0800 (PST) mail_from (owner-linux@cthulhu.engr.sgi.com) Received: (from majordomo-owner@localhost) by cthulhu.engr.sgi.com (980427.SGI.8.8.8/970903.SGI.AUTOCF) id OAA21363 for linux-list; Fri, 28 Jan 2000 14:30:07 -0800 (PST) mail_from (owner-linux@relay.engr.sgi.com) Received: from sgi.com (sgi.engr.sgi.com [192.26.80.37]) by cthulhu.engr.sgi.com (980427.SGI.8.8.8/970903.SGI.AUTOCF) via ESMTP id OAA07536 for ; Fri, 28 Jan 2000 14:30:04 -0800 (PST) mail_from (jharrell@ti.com) Received: from jester.ti.com (jester.ti.com [192.94.94.1]) by sgi.com (980327.SGI.8.8.8-aspam/980304.SGI-aspam: SGI does not authorize the use of its proprietary systems or networks for unsolicited or bulk email from the Internet.) via ESMTP id OAA03048 for ; Fri, 28 Jan 2000 14:30:02 -0800 (PST) mail_from (jharrell@ti.com) Received: from dlep6.itg.ti.com ([157.170.188.9]) by jester.ti.com (8.9.3/8.9.3) with ESMTP id QAA04989 for ; Fri, 28 Jan 2000 16:29:17 -0600 (CST) Received: from dlep6.itg.ti.com (localhost [127.0.0.1]) by dlep6.itg.ti.com (8.9.3/8.9.3) with ESMTP id QAA01101 for ; Fri, 28 Jan 2000 16:29:51 -0600 (CST) Received: from dlep4.itg.ti.com (dlep4.itg.ti.com [157.170.188.63]) by dlep6.itg.ti.com (8.9.3/8.9.3) with ESMTP id QAA01089 for ; Fri, 28 Jan 2000 16:29:50 -0600 (CST) Received: from ti.com (IDENT:jharrell@pcp97780pcs.sc.ti.com [158.218.100.100]) by dlep4.itg.ti.com (8.9.3/8.9.3) with ESMTP id QAA12777 for ; Fri, 28 Jan 2000 16:29:55 -0600 (CST) Message-ID: <389218F6.7CAD27A5@ti.com> Date: Fri, 28 Jan 2000 15:32:22 -0700 From: Jeff Harrell X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.2.12-20 i686) X-Accept-Language: en MIME-Version: 1.0 To: sgi-mips Subject: Question concerning memory configuration Content-Type: multipart/alternative; boundary="------------F3D7B55FFD548980CE46B13B" Sender: owner-linuxmips@oss.sgi.com Precedence: bulk Return-Path: X-Orcpt: rfc822;linuxmips-outgoing --------------F3D7B55FFD548980CE46B13B Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit I have question concerning the memory configuration variables in the MIPS/Linux codebase. I am working on a board that has 64Mbytes (0x400 0000) of SDRAM. We are using an R4000 core and have the memory map setup so that KSEG0 & KSEG1 both map to address 0x0 in physical memory. On our embedded system we are going to hard code the variable mips_memory_upper (This eventually is stored in memory_end). My question is what I should initialize the value to? Do I treat the top of memory as KSEG1 + 64Mbytes? (i.e., 0xA400 0000) or do I initialize it realative to 0? If anybody has any insights in this area, any information would be greatly appreciated. Thanks, Jeff -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jeff Harrell Work: (801) 619-6104 Broadband Access group/TI jharrell@ti.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ --------------F3D7B55FFD548980CE46B13B Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit I have question concerning the memory configuration variables in the MIPS/Linux
codebase.  I am working on a board that has 64Mbytes (0x400 0000) of SDRAM.  We
are using an R4000 core and have the memory map setup so that KSEG0 & KSEG1 both
map to address 0x0 in physical memory.  On our embedded system we are going to hard
code the variable mips_memory_upper (This eventually is stored in memory_end).  My
question is what I should initialize the value to?  Do I treat the top of memory as KSEG1
+ 64Mbytes? (i.e., 0xA400 0000) or do I initialize it realative to 0?  If anybody has any
insights in this area, any information would be greatly appreciated.

Thanks,
Jeff 

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jeff Harrell                    Work:  (801) 619-6104 
Broadband Access group/TI       
jharrell@ti.com
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