Re: [Gumstix-users] Bluetooth-ttyS0

[David F. <dav...@ya...>]

 
> Doesn't u-boot pass in stuff using tags? You
> should be able to add an
> additional tag. I haven't looked at the
> gumstix, but on our board
> (which uses a super-simple bootloader) uses the
> block of memory at
> 0xC000000 to pass tag information. On the arm,
> the kernel loads at
> 0xC0008000 and 0xC0004000 is used for the
> top-level MMU table.
> 
> I think that 0xC000000 becomes the zero page
> eventually.
> 
> Looking at arch/arm/mach-pxa/gumstix.c it would
> appear that the boot
> params are at 0xA0000100 (physical address
> because the 0xC0000000
> stuff hasn't been setup yet).

I'll have to look at that, do you mean the u-boot
environment space or the kernel parameters?
 
> So you could probably do something really
> hokey, like store a flag at

It may work locally, but I don't expect anyone
would like this.

> 0xA0003FFC, which wouldn't involve messing with
> tags, or you could
> have u-boot pass in an additional tag with the
> silent information, and

I guess ideally it should be one bit to test, 
otherwise parsing the u-boot environment for
"silent".

David.