From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ag-out-0708.google.com (ag-out-0708.google.com [72.14.246.247]) by ozlabs.org (Postfix) with ESMTP id 91F5EDDE24 for ; Thu, 11 Dec 2008 23:04:20 +1100 (EST) Received: by ag-out-0708.google.com with SMTP id 31so1096808agc.0 for ; Thu, 11 Dec 2008 04:04:18 -0800 (PST) Date: Thu, 11 Dec 2008 20:04:14 +0800 From: "maillist.kernel" To: linuxppc-dev Subject: How to support 3GB pci address? Message-ID: <200812112004118902765@gmail.com> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====003_Dragon652578677326_=====" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --=====003_Dragon652578677326_===== Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: 7bit Hi, we want to design a system using mpc8548, and linking with an idt 16 ports PCIE switch. In the system, the total PCI address needed is about 3GB, so I want to know how to support it in linux. mpc8548 has 36-bit real address, and can support 32GB PCIE address space, but in linux, there is only 1GB kernel space, how to map the 3GB pci address to kernel? Is the 36-bit real address only used to support large memory(>4GB) for muti-threads? Any suggestions please would be much appreciated! Thanks in advance for your help --=====003_Dragon652578677326_===== Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: 7bit
Hi, we want to design a system using mpc8548, and linking with an idt 16 ports PCIE switch.
In the system, the total PCI address needed is about 3GB, so I want to know how to support it in linux. mpc8548 has 36-bit real address, and can support 32GB PCIE address space, but in linux, there is only 1GB kernel space, how to map the 3GB pci address to kernel? Is the  36-bit real address only used to support large memory(>4GB) for muti-threads? 
 
Any suggestions please would be much appreciated!
 

Thanks in advance for your help

 
 
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