• Baruch Siach's avatar
    xtensa: remap io area defined in device tree · 6cb97111
    Baruch Siach authored
    Use the simple-bus node to discover the io area, and remap the cached and
    bypass io ranges. The parent-bus-address value of the first triplet in the
    "ranges" property is used. This value is rounded down to the nearest 256MB
    boundary. The length of the io area is fixed at 256MB; the "ranges" property
    length value is ignored.
    Other limitations: (1) only the first simple-bus node is considered, and (2)
    only the first triplet of the "ranges" property is considered.
    See ePAPR 1.1 §6.5 for the simple-bus node description, and §2.3.8 for the
    "ranges" property description.
    Signed-off-by: default avatarBaruch Siach <baruch@tkos.co.il>
    Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
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