Running Barebox in Barebox.
I have seen an example of tftp loading barebox in /dev/ram0 and then running it with the go command.
Is that something that has been tested with the MPC5200?
Else is there a good example to achieve this?
Cheers.
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Hi Renaud,
Quoted 2 lines · Renaud Barbier
I have seen an example of tftp loading barebox in
/dev/ram0and then running it with the go command.
Yes, this works on most boards.
Quoted 2 lines
Is that something that has been tested with the MPC5200?
This should work since
commit 1c9c937a6ac34c4d41fa70d0339f546f40b6c6d5
Author: Sascha Hauer <[email protected]> Date: Mon Sep 26 17:29:51 2011 +0200
ppc mpc5200b: cleanup lowlevel startup
The old startup process consisted of several CFG_LOWBOOT, CFG_RAMBOOT ifdeffery which I do not understand. So remove all this and replace it with:
- put the entry point for second stage loaders to offset 0x0 so that we can do a go /dev/ram0 to start a second barebox
- When we come from the reset vector assume MBAR is at 0x80000000
- When we come from the second stage entry assume that SPR 311 is in sync with the current MBAR address.
- Switch MBAR to 0xf0000000 and we are done.
Just tested on current master and this works for me.
Sascha
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