From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Lange <thomas@corelatus.se>
Date: Wed, 03 Nov 2004 17:13:47 +0100
Subject: [U-Boot-Users] U-boot for Mips 4KEC
In-Reply-To: <cmajjb$oie$1@sea.gmane.org>
References: <cmajjb$oie$1@sea.gmane.org>
Message-ID: <418903BB.2050703@corelatus.se>
List-Id: <u-boot.lists.denx.de>
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To: u-boot@lists.denx.de

If you look at the other MIPS boards, e.g. dbau1x00, you will
see that you setup SDRAM with assembler code to create a temporary
stack in sdram before executing any c code.
(start.S calls memsetup.S)

/Thomas

calvin wrote:
> Hi,
> 
> In the process of porting U-boot for Malta which uses mips 4Kec I 
> discovered that the stack required for intial C environment can neither 
> be obtained by some on-chip memory (IMMR in MPC8xx ) nor by using DCACHE 
> in locked mode. Mips 4KC has the DCache locked mode support but Mips 
> 4KEC has it only through external pin interface.
> 
> I am looking for a way of not using the C code till code has started 
> running from RAM. But how do I get the value of gd(global data pointer) 
> which U-boot expects? README file does not mention anything about mips 
> registers which are specifially used for this purpose.
> 
> Thanks and Regards,
> Pooja
> 
> 
> 
> 
> 
> 
> 
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