[LinuxBIOS] selection of compression algorithm

yhlu yinghailu at gmail.com
Tue May 23 21:53:05 CEST 2006

linuxbios_apc.rom is the code for ap. The code is in it's own cache.
So BSP is executing the code in ROM and RAM, and at the same time the
APs executing code in cache.

The AP uncompress the linuxbios_apc.rom from rom to it's cache before
jump it. At that time the RAM on BSP is ready already.


On 5/23/06, Stefan Reinauer <stepan at coresystems.de> wrote:
> * yhlu <yinghailu at gmail.com> [060523 11:26]:
> > I may only want to lzma for payload if we can sqush tiny kernel and
> > initrd in 1M with LinuxBIOS.
> Thats why we all would want to see this, yes. But using nrv2b if lzma is
> so much more efficient makes not much sense in any other case either.
> > I may need to use nrv2b for linuxbios_ram.rom and
> > linuxbios_ap_code.rom.
>  * What's linuxbios_ap_code.rom?
> > These too can share the code in car stage. and
> > code in cache can not have too much space for lzma properties array.
> When we're uncompressing, we do have memory. So cache sizes are no
> restriction at this point anymore.
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