Re: Booting uncompressed kernel image on i386?

[Ondrej Zary <linux@rainbow-software.org>]

Wakko Warner wrote:
> Ondrej Zary wrote:
> 
>>Nobody answered, time to look at the code :-)
>>The attached patch is a quick hack so "make" will create uncompressed 
>>kernel that can be booted in regular way.
> 
> 
>>--- linux-2.6.12-printserver/arch/i386/boot/compressed/misc.c	2005-06-17 21:48:29.000000000 +0200
>>+++ linux-2.6.12-pentium/arch/i386/boot/compressed/misc.c	2005-07-01 23:34:55.000000000 +0200
>>@@ -374,7 +374,15 @@
>> 
>> 	makecrc();
>> 	putstr("Uncompressing Linux... ");
> 
> 
> Would it not make sense to remove the above line?  You're not actually
> uncompressing anything.
> 
It would but I kept it there for debugging (to see where it crashed :-)
Anyway, I'd like to add new target "make uImage" (or something like 
that) but that requires more work. Something like this might be 
interesting for embedded systems which want to minimalize boot time.

>>-	gunzip();
>>+	int i;
>>+	for (i = 0; i < input_len / WSIZE; i++) {
>>+		memcpy(window, input_data+i*WSIZE, WSIZE);
>>+		outcnt = WSIZE;
>>+		flush_window();
>>+	}
>>+	memcpy(window, input_data+i*WSIZE, input_len % WSIZE);
>>+	outcnt = input_len % WSIZE;
>>+	flush_window();
>> 	putstr("Ok, booting the kernel.\n");
>> 	if (high_loaded) close_output_buffer_if_we_run_high(mv);
>> 	return high_loaded;
> 
> 


-- 
Ondrej Zary