[U-Boot] Using an initramfs in SDRAM

[U-Boot] Using an initramfs in SDRAM

[Boswell, Patrick]

 

Hello,

 

What bootargs should I pass to have a JTAG preloaded initramfs in SDRAM
be used by a booting Linux (2.6.32) kernel

for an Android boot system?

 

My platform is an OMAP3530. I would like to have the initramfs in SDRAM
versus the MMC/SD card, as is typical

with a Beagleboard running Android.

 

Will a bootarg like "root=0x8f000000" work instead of
"root=/dev/mmcblk0p2"?

 

Thanks.

 

 

[U-Boot] Using an initramfs in SDRAM

[Wolfgang Denk]

Dear "Boswell, Patrick",

In message <0E62BBF85AF134469094EB502CE90A321EAC24@TAMPA202EM.se.sypris.com> you wrote:
> 
> What bootargs should I pass to have a JTAG preloaded initramfs in SDRAM
> be used by a booting Linux (2.6.32) kernel

This is a Linux question, not an U-oot one, so you are actually off
topic here.

> Will a bootarg like "root=0x8f000000" work instead of
> "root=/dev/mmcblk0p2"?

No, it will not work.  You want to read
Documentation/kernel-parameters.txt and Documentation/initrd.txt in
your Linux kernel tree.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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[U-Boot] Using an initramfs in SDRAM

[Eric Cooper]

On Thu, Feb 17, 2011 at 09:38:23AM -0500, Boswell, Patrick wrote:
> What bootargs should I pass to have a JTAG preloaded initramfs in SDRAM
> be used by a booting Linux (2.6.32) kernel for an Android boot system?

Unless I'm misunderstanding your question, you can convert your
initramfs image into a uInitrd (with mkimage), use u-boot to load that
into memory (from MMC or whatever), and then pass its address as the
second argument to bootm.

-- 
Eric Cooper             e c c @ c m u . e d u