• Miodrag Dinic's avatar
    MIPS: ranchu: Add Ranchu as a new generic-based board · f2d0b0d5
    Miodrag Dinic authored
    Provide amendments to the MIPS generic platform framework so that
    the new generic-based board Ranchu can be chosen to be built.
    
    The Ranchu board is intended to be used by Android emulator. The name
    "Ranchu" originates from Android development community. "Goldfish" and
    "Ranchu" are terms used for two generations of virtual boards used by
    Android emulator. The name "Ranchu" is a newer one among the two, and
    this patch deals with Ranchu. However, for historical reasons, some
    devices/drivers still contain the name "Goldfish".
    
    MIPS Ranchu machine includes a number of Goldfish devices. The support
    for Virtio devices is also included. Ranchu board supports up to 16
    Virtio devices which can be attached using Virtio MMIO Bus. This is
    summarized in the following picture:
    
           ABUS
            ||----MIPS CPU
            ||       |                    IRQs
            ||----Goldfish PIC------------(32)--------
            ||                     | | | | | | | | |
            ||----Goldfish TTY------ | | | | | | | |
            ||                       | | | | | | | |
            ||----Goldfish RTC-------- | | | | | | |
            ||                         | | | | | | |
            ||----Goldfish FB----------- | | | | | |
            ||                           | | | | | |
            ||----Goldfish Events--------- | | | | |
            ||                             | | | | |
            ||----Goldfish Audio------------ | | | |
            ||                               | | | |
            ||----Goldfish Battery------------ | | |
            ||                                 | | |
            ||----Android PIPE------------------ | |
            ||                                   | |
            ||----Virtio MMIO Bus                | |
            ||    |    |    |                    | |
            ||    |    |   (virtio-block)--------- |
            ||   (16)  |                           |
            ||    |   (virtio-net)------------------
    
    Device Tree is created on the QEMU side based on the information about
    devices IO map and IRQ numbers. Kernel will load this DTB using UHI
    boot protocol DTB handover mode.
    Signed-off-by: default avatarMiodrag Dinic <miodrag.dinic@mips.com>
    Signed-off-by: default avatarGoran Ferenc <goran.ferenc@mips.com>
    Signed-off-by: default avatarAleksandar Markovic <aleksandar.markovic@mips.com>
    Reviewed-by: default avatarJames Hogan <jhogan@kernel.org>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: Paul Burton <paul.burton@mips.com>
    Cc: linux-mips@linux-mips.org
    Patchwork: https://patchwork.linux-mips.org/patch/18138/Signed-off-by: default avatarJames Hogan <jhogan@kernel.org>
    f2d0b0d5
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