1 // Copyright 2024 Red Hat, Inc. 2 // Author(s): Paolo Bonzini <pbonzini@redhat.com> 3 // SPDX-License-Identifier: GPL-2.0-or-later 4 5 use std::{ffi::CStr, ptr::addr_of}; 6 7 pub use bindings::{SysBusDevice, SysBusDeviceClass}; 8 9 use crate::{ 10 bindings, cell::bql_locked, irq::InterruptSource, prelude::*, qdev::DeviceClass, 11 qom::ClassInitImpl, 12 }; 13 14 unsafe impl ObjectType for SysBusDevice { 15 type Class = SysBusDeviceClass; 16 const TYPE_NAME: &'static CStr = 17 unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_SYS_BUS_DEVICE) }; 18 } 19 20 // TODO: add SysBusDeviceImpl 21 impl<T> ClassInitImpl<SysBusDeviceClass> for T 22 where 23 T: ClassInitImpl<DeviceClass>, 24 { 25 fn class_init(sdc: &mut SysBusDeviceClass) { 26 <T as ClassInitImpl<DeviceClass>>::class_init(&mut sdc.parent_class); 27 } 28 } 29 30 impl SysBusDevice { 31 /// Return `self` cast to a mutable pointer, for use in calls to C code. 32 const fn as_mut_ptr(&self) -> *mut SysBusDevice { 33 addr_of!(*self) as *mut _ 34 } 35 36 /// Expose an interrupt source outside the device as a qdev GPIO output. 37 /// Note that the ordering of calls to `init_irq` is important, since 38 /// whoever creates the sysbus device will refer to the interrupts with 39 /// a number that corresponds to the order of calls to `init_irq`. 40 pub fn init_irq(&self, irq: &InterruptSource) { 41 assert!(bql_locked()); 42 unsafe { 43 bindings::sysbus_init_irq(self.as_mut_ptr(), irq.as_ptr()); 44 } 45 } 46 } 47