1 // Copyright 2024, Linaro Limited
2 // Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
3 // SPDX-License-Identifier: GPL-2.0-or-later
4
5 use core::ptr::NonNull;
6 use std::os::raw::{c_uint, c_void};
7
8 use qemu_api::{bindings::*, zeroable::Zeroable};
9
10 use crate::device::PL011State;
11
12 pub static PL011_OPS: MemoryRegionOps = MemoryRegionOps {
13 read: Some(pl011_read),
14 write: Some(pl011_write),
15 read_with_attrs: None,
16 write_with_attrs: None,
17 endianness: device_endian::DEVICE_NATIVE_ENDIAN,
18 valid: Zeroable::ZERO,
19 impl_: MemoryRegionOps__bindgen_ty_2 {
20 min_access_size: 4,
21 max_access_size: 4,
22 ..Zeroable::ZERO
23 },
24 };
25
pl011_read(opaque: *mut c_void, addr: hwaddr, size: c_uint) -> u6426 unsafe extern "C" fn pl011_read(opaque: *mut c_void, addr: hwaddr, size: c_uint) -> u64 {
27 assert!(!opaque.is_null());
28 let mut state = unsafe { NonNull::new_unchecked(opaque.cast::<PL011State>()) };
29 let val = unsafe { state.as_mut().read(addr, size) };
30 match val {
31 std::ops::ControlFlow::Break(val) => val,
32 std::ops::ControlFlow::Continue(val) => {
33 // SAFETY: self.char_backend is a valid CharBackend instance after it's been
34 // initialized in realize().
35 let cb_ptr = unsafe { core::ptr::addr_of_mut!(state.as_mut().char_backend) };
36 unsafe { qemu_chr_fe_accept_input(cb_ptr) };
37
38 val
39 }
40 }
41 }
42
pl011_write(opaque: *mut c_void, addr: hwaddr, data: u64, _size: c_uint)43 unsafe extern "C" fn pl011_write(opaque: *mut c_void, addr: hwaddr, data: u64, _size: c_uint) {
44 unsafe {
45 assert!(!opaque.is_null());
46 let mut state = NonNull::new_unchecked(opaque.cast::<PL011State>());
47 state.as_mut().write(addr, data)
48 }
49 }
50