[LinuxBIOS] selection of compression algorithm

[Lu, Yinghai]

Copy_and_run is used by CAR and included in cache_as_ram_auto.c and
compiled with gcc. That should be changed to use lzma easily.

CONFIG_COMPRESSED_ROM_STREAM is used for pay load. --- stream_init will
do the uncompressed. ( stream_init is in ram)

CONFIG_COMPRESS is for linuxbios_ram.rom --- copy_and_run will do the
uncompress. ( copy_and_run is ROM, and used ram as stack and local
variable)

You may create one file only that is corresponding to lib/nrv2b.c...

YH

-----Original Message-----
From: linuxbios-bounces at linuxbios.org
[mailto:linuxbios-bounces at linuxbios.org] On Behalf Of Carl-Daniel
Hailfinger
Sent: Monday, May 22, 2006 12:29 PM
To: yhlu
Cc: Stefan Reinauer; LinuxBIOS
Subject: Re: [LinuxBIOS] selection of compression algorithm

> On 5/22/06, Stefan Reinauer <stepan at coresystems.de> wrote:
>> We never actually compile nrv2b with romcc, do we? At the point we
run
>> nrv2b ram has to be enabled anyways - we uncompress the code
somewhere.
>> So our limits are far bigger than that.

yhlu wrote:
> in crt0.s, and it is used to uncompress linuxbios_ram when using
romcc.

You mean copy_and_run() is compiled with romcc? Can we change that?

What's the difference between CONFIG_COMPRESSED_ROM_STREAM and
CONFIG_COMPRESS? Can we use lzma compression for both?


Regards,
Carl-Daniel
-- 
http://www.hailfinger.org/

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