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::{bindings, cell::bql_locked, irq::InterruptSource, prelude::*}; 10 11 unsafe impl ObjectType for SysBusDevice { 12 type Class = SysBusDeviceClass; 13 const TYPE_NAME: &'static CStr = 14 unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_SYS_BUS_DEVICE) }; 15 } 16 17 impl SysBusDevice { 18 /// Return `self` cast to a mutable pointer, for use in calls to C code. 19 const fn as_mut_ptr(&self) -> *mut SysBusDevice { 20 addr_of!(*self) as *mut _ 21 } 22 23 /// Expose an interrupt source outside the device as a qdev GPIO output. 24 /// Note that the ordering of calls to `init_irq` is important, since 25 /// whoever creates the sysbus device will refer to the interrupts with 26 /// a number that corresponds to the order of calls to `init_irq`. 27 pub fn init_irq(&self, irq: &InterruptSource) { 28 assert!(bql_locked()); 29 unsafe { 30 bindings::sysbus_init_irq(self.as_mut_ptr(), irq.as_ptr()); 31 } 32 } 33 } 34