sdk/banjo/ddk.protocol.acpi/acpi.banjo

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library ddk.protocol.acpi;

using zx;

struct AcpiMmio {
    /// Offset from beginning of VMO where the mmio region begins.
    zx.off offset;
    /// Size of mmio region.
    usize size;
    handle<vmo> vmo;
};

[Layout = "ddk-protocol"]
protocol Acpi {
    GetPio(uint32 index) -> (zx.status s, handle<resource> pio);
    GetMmio(uint32 index) -> (zx.status s, AcpiMmio mmio);
    MapInterrupt(int64 index) -> (zx.status s, handle<interrupt> @handle);
    GetBti(uint32 bdf, uint32 index) -> (zx.status s, handle<bti> bti);
    ConnectSysmem(handle<channel> connection) -> (zx.status s);
    RegisterSysmemHeap(uint64 heap, handle<channel> connection) -> (zx.status s);
};

/// A generic ACPI device. This will allow devices to query information directly
/// from ACPI, removing the need for them to be implemented directly in the
/// board driver.
[Layout = "ddk-protocol"]
protocol AcpiDevice {
    /// For now, this has a single stub method, since banjo protocols require
    /// at least one method, but we will add methods as the requirements become
    /// clearer.
    Stub() -> ();
};