Florian Boelstler wrote:
Available system memory is only 384 MB (CAM0+CAM1+CAM2), which explains
why Linux "removed" the ramdisk, when it has been copied right below
508M by U-Boot. Because at that time I was using initrd_high @ 1FC00000,
which is outside of mapped RAM.
Is there an option to map less than 64M by a CAM entry?
CAM entries can be any power of 4 between 4K and 256M. However, the
code currently is hardcoded to use no more than 3 entries. It shouldn't
be too hard to change it to use a few more (see cam_mapin_ram(),
mmu_mapin_ram(), and adjust_total_lowmem() in
arch/powerpc/mm/fsl_booke_mmu.c).
Alternately, do you have highmem enabled? That will let you access the
rest of the RAM that the CAM doesn't map, though I don't know if an
initrd in highmem works.
-Scott
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