// Copyright 2021 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 fuchsia.hardware.acpi;

/// These values are taken from source/include/actypes.h in ACPICA.
type AddressSpace = flexible enum {
    SYSTEM_MEMORY = 0;
    SYSTEM_IO = 1;
    PCI_CONFIG = 2;
    EC = 3;
    SMBUS = 4;
    CMOS = 5;
    PCI_BAR_TARGET = 6;
    IPMI = 7;
    GPIO = 8;
    GSBUS = 9;
    PLATFORM_COMM = 10;
};

protocol AddressSpaceHandler {
    /// Read a value from this address space.
    Read(struct {
        /// Address to be read.
        address uint64;
        /// Bit width of the operation (usually 8, 16, 32, or 64).
        width uint32;
    }) -> (struct {
        /// Value returned by read.
        value uint64;
    }) error Status;

    /// Write a value to this address space.
    Write(struct {
        /// Address to be written.
        address uint64;
        /// Bit width of the operation (usually 8, 16, 32, or 64).
        width uint32;
        /// Value to be written.
        value uint64;
    }) -> (struct {}) error Status;
};