Barebox PBL with uncompressed barebox proper

[Lior Weintraub]

Thanks Sascha!

Before applying the recommended change the trace showed:
uncompress.c: memory at 0xc000000000, size 0x00300000
uncompress.c: uncompressing barebox binary at 0x000000c000002b60 (size 0x00030def) to 0xc000100000 (uncompressed size: 0x0005a9a0)
uncompress.c: jumping to uncompressed image at 0x000000c000100000

After applying this configuration, the .img file was increased (as expected) and the trace shows:
uncompress.c: memory at 0xc000000000, size 0x00300000
uncompress.c: uncompressing barebox binary at 0x000000c000002480 (size 0x0005a9a4) to 0xc000100000 (uncompressed size: 0x0005a9a0)
uncompress.c: jumping to uncompressed image at 0x000000c000100000

Indeed is seems link an uncompressed image because the sizes of the "compressed" match to the uncompress (well except 4 bytes which probably indicate the image size or the compression type (just a guess)).

I assume that the decompress function detects the header and know that it is an uncompressed image and then just copy it to another location (in my case 0xc000100000).

Can we avoid this step?
Since the image was loaded into SRAM we wish to run locally without the extra relocation (which also takes simulation time).

Cheers,
Lior.



> -----Original Message-----
> From: Sascha Hauer <s.hauer at pengutronix.de>
> Sent: Wednesday, August 16, 2023 1:44 PM
> To: Lior Weintraub <liorw at pliops.com>
> Cc: barebox at lists.infradead.org; Ahmad Fatoum
> <a.fatoum at pengutronix.de>
> Subject: Re: Barebox PBL with uncompressed barebox proper
> 
> CAUTION: External Sender
> 
> On Wed, Aug 16, 2023 at 10:36:16AM +0000, Lior Weintraub wrote:
> > Hi,
> >
> > Is there as option to build a barebox PBL with uncompressed barebox
> proper?
> > The incentive for that is to accelerate RTL simulations.
> 
> Yes, just enable CONFIG_IMAGE_COMPRESSION_NONE.
> 
> Sascha
> 
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