[Etherboot-developers] mknbi-1.2-7rc3 released

[<ke...@us...>]

>Ah, ok I guess I was being lazy and assuming that the second segment
>would be above 1MB.
>
>Ok, I didn't realise that ramdisk_max was a cap rather than the actual
>top of memory. Makes sense. Will fix.

Sorry, the last posting went to Etherboot-users by mistake, mystifying
newbies no doubt, but I think I've got the code right now (famous last
words). Latest release is in:

	http://etherboot.sf.net/mknbi-1.2-7rc3.tar.gz

Here's the relevant segment:

	...
	get_memsizes();
	max = (setup->su_version >= 0x203) ? setup->ramdisk_max : 0x37FFFFFF;
	/* compute top of initrd only if user has not overridden it */
	if (top_of_initrd == 0) {
		struct e820entry	*e;
		/* look for highest E820_RAM that is under ramdisk_max
		   strictly speaking we should also check that
		   we have room for the ramdisk in the memory segment */
		for (i = 0; i < meminfo.map_count; i++) {
			e = &meminfo.map[i];
			if (e->type == E820_RAM
				&& e->addr < max
				&& (e->addr + e->size) > top_of_initrd)
				top_of_initrd = e->addr + e->size;
		}
	}
	if (top_of_initrd > max)
		top_of_initrd = max;
	/* Round down to next lower 4k boundary */
	top_of_initrd &= ~0xFFF;
	printf("Top of initrd is %dk\n", top_of_initrd >> 10);
	...

and top_of_initrd measures bytes now.