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::ptr::addr_of; 6 7 pub use bindings::{SysBusDevice, SysBusDeviceClass}; 8 9 use crate::{bindings, cell::bql_locked, irq::InterruptSource}; 10 11 impl SysBusDevice { 12 /// Return `self` cast to a mutable pointer, for use in calls to C code. 13 const fn as_mut_ptr(&self) -> *mut SysBusDevice { 14 addr_of!(*self) as *mut _ 15 } 16 17 /// Expose an interrupt source outside the device as a qdev GPIO output. 18 /// Note that the ordering of calls to `init_irq` is important, since 19 /// whoever creates the sysbus device will refer to the interrupts with 20 /// a number that corresponds to the order of calls to `init_irq`. 21 pub fn init_irq(&self, irq: &InterruptSource) { 22 assert!(bql_locked()); 23 unsafe { 24 bindings::sysbus_init_irq(self.as_mut_ptr(), irq.as_ptr()); 25 } 26 } 27 } 28