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::{self, DeviceClass}, 11 cell::bql_locked, 12 irq::InterruptSource, 13 prelude::*, 14 qom::ClassInitImpl, 15 }; 16 17 unsafe impl ObjectType for SysBusDevice { 18 type Class = SysBusDeviceClass; 19 const TYPE_NAME: &'static CStr = 20 unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_SYS_BUS_DEVICE) }; 21 } 22 23 // TODO: add SysBusDeviceImpl 24 impl<T> ClassInitImpl<SysBusDeviceClass> for T 25 where 26 T: ClassInitImpl<DeviceClass>, 27 { 28 fn class_init(sdc: &mut SysBusDeviceClass) { 29 <T as ClassInitImpl<DeviceClass>>::class_init(&mut sdc.parent_class); 30 } 31 } 32 33 impl SysBusDevice { 34 /// Return `self` cast to a mutable pointer, for use in calls to C code. 35 const fn as_mut_ptr(&self) -> *mut SysBusDevice { 36 addr_of!(*self) as *mut _ 37 } 38 39 /// Expose an interrupt source outside the device as a qdev GPIO output. 40 /// Note that the ordering of calls to `init_irq` is important, since 41 /// whoever creates the sysbus device will refer to the interrupts with 42 /// a number that corresponds to the order of calls to `init_irq`. 43 pub fn init_irq(&self, irq: &InterruptSource) { 44 assert!(bql_locked()); 45 unsafe { 46 bindings::sysbus_init_irq(self.as_mut_ptr(), irq.as_ptr()); 47 } 48 } 49 } 50