[Simpad-general] Re: Re-partitioning flash

[Albert R. <al...@ir...>]

Ahh, I see. So bootloader replaces kernel parameters with its own, so
I need to build a kernel with static definition of flash partitions. 

But what about bootloader itself? How to change its idea of flash
partitions? Would just deleting and re-creating flash partitions of
different sizes from boot> prompt work? In other words, is it only
kernel parameters where flash partitions are hard-coded inside
bootloader? Everything else is changable from boot> prompt? 

And how reliable this bootloader in regards of partition delition/
creation? Obviously, I want to avoid a possibility of briking my
pad and working out jtag magic...
 -albertr 


Michael 'Mickey' Lauer writes: 

> Am Samstag, den 25.06.2005, 09:36 -0400 schrieb Albert Rybalkin:
>> Hello,  
>> 
>> I'm using hh bootloader on my SL4 (the version compiled for
>> 0.9.0-rc1 opensimpad build). It has the following partitions
>> defined in flash:  
>> 
>> 0x00000000-0x00040000 : "bootldr"
>> 0x00040000-0x01800000 : "root"
>> 0x01800000-0x02000000 : "home"  
>> 
>> I would like to get rid of /home partition and make root partition
>> occupy remaining space. I'm aware that I need to pass static partition
>> definition to the kernel. But do I need to change anything in the
>> bootloader? How does bootloader finds partitions in flash? Does it
>> just scans all flash or it has some parameters which statically
>> define partitions? Is it safe to assume that I can just drop
>> to boot> prompt, delete root and home partitions, then create one
>> large root partition, erase it and copy jffs2 image to it?
> 
> In general, see linux/drivers/mtd/maps/sa1100.c 
> 
> bootldr passes in flash geometry parameters via kernel CMDline. You need
> to build a new bootldr if you want to change its idea of the geometry on
> that device or disable setting mtd params via cmdline in the kernel and
> adapt sa1100.c to use a static mapping that pleases you. 
> 
> -- 
> Regards, 
> 
> Mickey.
> ------------------------------------------------------------------
> Dipl.-Inf. Michael 'Mickey' Lauer <mi...@tm...>
> ------------------------------------------------------------------ 
> 
>  
> 
> 
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