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559a779c6a
The ObjectDeref trait now provides all the magic that is required to fake inheritance. Replace the "impl SysBusDevice" block of qemu_api::sysbus with a trait, so that sysbus_init_irq() can be invoked as "self.init_irq()" without any intermediate upcast. Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
64 lines
2.1 KiB
Rust
64 lines
2.1 KiB
Rust
// Copyright 2024 Red Hat, Inc.
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// Author(s): Paolo Bonzini <pbonzini@redhat.com>
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// SPDX-License-Identifier: GPL-2.0-or-later
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use std::{ffi::CStr, ptr::addr_of};
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pub use bindings::{SysBusDevice, SysBusDeviceClass};
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use crate::{
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bindings,
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cell::bql_locked,
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irq::InterruptSource,
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prelude::*,
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qdev::{DeviceClass, DeviceState},
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qom::ClassInitImpl,
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};
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unsafe impl ObjectType for SysBusDevice {
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type Class = SysBusDeviceClass;
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const TYPE_NAME: &'static CStr =
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unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_SYS_BUS_DEVICE) };
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}
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qom_isa!(SysBusDevice: DeviceState, Object);
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// TODO: add SysBusDeviceImpl
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impl<T> ClassInitImpl<SysBusDeviceClass> for T
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where
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T: ClassInitImpl<DeviceClass>,
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{
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fn class_init(sdc: &mut SysBusDeviceClass) {
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<T as ClassInitImpl<DeviceClass>>::class_init(&mut sdc.parent_class);
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}
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}
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/// Trait for methods of [`SysBusDevice`] and its subclasses.
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pub trait SysBusDeviceMethods: ObjectDeref
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where
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Self::Target: IsA<SysBusDevice>,
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{
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/// Expose a memory region to the board so that it can give it an address
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/// in guest memory. Note that the ordering of calls to `init_mmio` is
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/// important, since whoever creates the sysbus device will refer to the
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/// region with a number that corresponds to the order of calls to
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/// `init_mmio`.
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fn init_mmio(&self, iomem: &bindings::MemoryRegion) {
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assert!(bql_locked());
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unsafe {
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bindings::sysbus_init_mmio(self.as_mut_ptr(), addr_of!(*iomem) as *mut _);
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}
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}
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/// Expose an interrupt source outside the device as a qdev GPIO output.
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/// Note that the ordering of calls to `init_irq` is important, since
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/// whoever creates the sysbus device will refer to the interrupts with
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/// a number that corresponds to the order of calls to `init_irq`.
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fn init_irq(&self, irq: &InterruptSource) {
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assert!(bql_locked());
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unsafe {
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bindings::sysbus_init_irq(self.as_mut_ptr(), irq.as_ptr());
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}
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}
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}
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impl<R: ObjectDeref> SysBusDeviceMethods for R where R::Target: IsA<SysBusDevice> {}
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