On Wed, Jul 18, 2001 at 09:09:42PM -0700, Chris Vandomelen wrote:
> Since I can't seem to find any information about this anywhere else, I
> figured this would be the appropriate place to ask.
> I'm using a moderately hacked 2.4.0-test9 kernel from the linux-vr
> repository (the only complete kernel, excluding NetBSD, that I've found
> which runs on CE devices at the moment), and it doesn't want to recognize
> all 48M of RAM in the device, only the 1st 16. The memory is mapped as
> 0M - 16M: On-board memory
> 16M - 32M: Unmapped region
> 32M - 64M: Memory expansion card
> When the first 16M is checked, the memory immediately after that is found
> to be non-existant.
> Does anyone have a patch (other than the hack I tossed together to turn
> the 32M-64M chunk into an MTD device)
Now that hack took longer to implement than a proper solution ...
> that would be useful to work past the memory hole?
Put something like the following into your systems prom_meminit:
add_memory_region(0UL , 16UL << 20, BOOT_MEM_RAM);
add_memory_region(16UL , 16UL << 20, BOOT_MEM_RESERVED);
add_memory_region(32UL << 20, 32UL << 20, BOOT_MEM_RAM);
You may want to account for additional memory areas and do a proper detection
etc., exclude area which are used by the firmware etc.