• David Gibson's avatar
    Better support for dma_addr_t variables · 8292f75a
    David Gibson authored
    
    
    A while back, we introduced the dma_addr_t type, which is supposed to
    be used for bus visible memory addresses.  At present, this is an
    alias for target_phys_addr_t, but this will change when we eventually
    add support for guest visible IOMMUs.
    
    There are some instances of target_phys_addr_t in the code now which
    should really be dma_addr_t, but can't be trivially converted due to
    missing features which this patch corrects.
    
     * We add DMA_ADDR_BITS analagous to TARGET_PHYS_ADDR_BITS.  This is
       important where we need to make a compile-time (#if) based on the
       size of dma_addr_t.
    
     * We add a new helper macro to create device properties which take a
       dma_addr_t, currently an alias to DEFINE_PROP_TADDR().
    Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
    8292f75a
qdev-dma.h 376 Bytes