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// Copyright 2024 Red Hat, Inc.
// Author(s): Paolo Bonzini <pbonzini@redhat.com>
// SPDX-License-Identifier: GPL-2.0-or-later
use std::{ffi::CStr, ptr::addr_of};
pub use bindings::{SysBusDevice, SysBusDeviceClass};
use crate::{
bindings,
cell::bql_locked,
irq::InterruptSource,
prelude::*,
qdev::{DeviceClass, DeviceState},
qom::ClassInitImpl,
};
unsafe impl ObjectType for SysBusDevice {
type Class = SysBusDeviceClass;
const TYPE_NAME: &'static CStr =
unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_SYS_BUS_DEVICE) };
}
qom_isa!(SysBusDevice: DeviceState, Object);
// TODO: add SysBusDeviceImpl
impl<T> ClassInitImpl<SysBusDeviceClass> for T
where
T: ClassInitImpl<DeviceClass>,
{
fn class_init(sdc: &mut SysBusDeviceClass) {
<T as ClassInitImpl<DeviceClass>>::class_init(&mut sdc.parent_class);
}
}
/// Trait for methods of [`SysBusDevice`] and its subclasses.
pub trait SysBusDeviceMethods: ObjectDeref
where
Self::Target: IsA<SysBusDevice>,
{
/// Expose a memory region to the board so that it can give it an address
/// in guest memory. Note that the ordering of calls to `init_mmio` is
/// important, since whoever creates the sysbus device will refer to the
/// region with a number that corresponds to the order of calls to
/// `init_mmio`.
fn init_mmio(&self, iomem: &bindings::MemoryRegion) {
assert!(bql_locked());
unsafe {
bindings::sysbus_init_mmio(self.as_mut_ptr(), addr_of!(*iomem) as *mut _);
}
}
/// Expose an interrupt source outside the device as a qdev GPIO output.
/// Note that the ordering of calls to `init_irq` is important, since
/// whoever creates the sysbus device will refer to the interrupts with
/// a number that corresponds to the order of calls to `init_irq`.
fn init_irq(&self, irq: &InterruptSource) {
assert!(bql_locked());
unsafe {
bindings::sysbus_init_irq(self.as_mut_ptr(), irq.as_ptr());
}
}
}
impl<R: ObjectDeref> SysBusDeviceMethods for R where R::Target: IsA<SysBusDevice> {}
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