RE: [U-Boot-Users] Standalone application problem
Wolfgang,
Would stand alone application called though the uboot call interface need to be GPL'ed? I'm not sure that I would use it that way, but the flexibility it would provide would be useful.
Regards,
Richard W.
-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf Of Wolfgang Denk Sent: Tuesday, November 25, 2003 1:18 PM To: Srikanth Sherman Cc: U-Boot Subject: Re: [U-Boot-Users] Standalone application problem
Hello,
in message 006201c3b385$fcc72e00$1000a8c0@tsihq.com you wrote:
However, I would like to burn the application into the
onboard flash
and execute it on powerup. If I copy the .bin to 0xff800000
and then
set my bootcmd to "go 0xff80000" everything seems to work
OK until I
leave the
You cannot do this so easy. First, the image is linked to a specific address; it is NOT position-independend. Second, the image expects to find writable data and BSS segments which fail when burned to ROM/flash.
How do I load a stand-alone application .bin onto flash
after loading
it into RAM? Secondly, how do I load and run "hello_world" (ELF) correctly? I know I'm missing something really basic here!
You can copy a stand-alone application to flash for storage; but to run it you will have to load (copy it back) to it's link address in RAM. If you want images which support XIP from flash you will need to twiddle the linker script a bit.
Also note that you can wrap your stand-alone application into a "Standalone Image" (image type IH_TYPE_STANDALONE) which would take care of (eventually uncompressing and) loading the image to it's start address.
Best regards,
Wolfgang Denk
-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de Nothing ever becomes real until it is experienced. - John Keats
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Dear Richard,
in message 71555548814716479478431542AA5F8A058D58@dlee2k04.ent.ti.com you wrote:
Would stand alone application called though the uboot call interface need to be GPL'ed? I'm not sure that I would use it that way, but the flexibility it would provide would be useful.
No, there is no need to put standalone application under GPL. This was one of the intentions when I created this feature.
Having said this, I nevertheless strongly encourage everybody to put all code under GPL (or a compatible open source license) anyway.
Best regards,
Wolfgang Denk
participants (2)
-
Wolfgang Denk -
Woodruff, Richard