• Albert Herranz's avatar
    wii: use both mem1 and mem2 as ram · de32400d
    Albert Herranz authored
    The Nintendo Wii video game console has two discontiguous RAM regions:
    - MEM1: 24MB @ 0x00000000
    - MEM2: 64MB @ 0x10000000
    
    Unfortunately, the kernel currently does not support discontiguous RAM
    memory regions on 32-bit PowerPC platforms.
    
    This patch adds a series of workarounds to allow the use of the second
    memory region (MEM2) as RAM by the kernel.
    Basically, a single range of memory from the beginning of MEM1 to the
    end of MEM2 is reported to the kernel, and a memory reservation is
    created for the hole between MEM1 and MEM2.
    
    With this patch the system is able to use all the available RAM and not
    just ~27% of it.
    
    This will no longer be needed when proper discontig memory support
    for 32-bit PowerPC is added to the kernel.
    Signed-off-by: default avatarAlbert Herranz <albert_herranz@yahoo.es>
    Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
    de32400d
pgtable_32.c 10.3 KB