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From: Hebbar <gururajakr@sanyo.co.in>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users]  how to Relocate arm startup code
Date: Mon, 11 Feb 2008 16:59:00 -0800 (PST)	[thread overview]
Message-ID: <15424226.post@talk.nabble.com> (raw)


Hi,

I am working on a customized arm926ejs versatile board. My board has SDRAM
at reset vector i.e., @ 0x00 and FLASH is located at a different higher
lcoation. At Boot up, SDRAm is mapped to Flash. I have to enable few
register and enable sdram chip. @ reset the arm uboot startup code has 

b reset

which point to TEXT_BASE + 0x50 which in my case falls to uninitialized
SDRAM and hence it fails. So i have to hard code the startup to point to my
flash location. so 

Instead of 
b reset

i have 
ldr	pc, _flash_reset

where 
_flash_reset:
	.word (CFG_FLASH_BASE + reset - TEXT_BASE)

So i want to know if there is any better alternative to this instead of hard
coding. Also i would like to know how this taken care of for versatile
board.

Regards
Gururaja
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View this message in context: http://www.nabble.com/how-to-Relocate-arm-startup-code-tp15424226p15424226.html
Sent from the Uboot - Users mailing list archive at Nabble.com.

                 reply	other threads:[~2008-02-12  0:59 UTC|newest]

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