1 /*
2  * Copyright (c) 2024 Google Inc. All rights reserved
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining
5  * a copy of this software and associated documentation files
6  * (the "Software"), to deal in the Software without restriction,
7  * including without limitation the rights to use, copy, modify, merge,
8  * publish, distribute, sublicense, and/or sell copies of the Software,
9  * and to permit persons to whom the Software is furnished to do so,
10  * subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be
13  * included in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22  */
23 
24 use cfg_if::cfg_if;
25 
26 cfg_if! {
27     if #[cfg(target_arch = "aarch64")] {
28         mod aarch64;
29         pub(crate) use aarch64::*;
30     } else if #[cfg(target_arch = "x86_64")] {
31         mod x86_64;
32         pub(crate) use x86_64::*;
33     } else {
34         use core::ptr::NonNull;
35         use virtio_drivers::BufferDirection;
36         use virtio_drivers::PhysAddr;
37 
38         pub(crate) fn dma_alloc_share(_paddr: usize, _size: usize) {
39             unimplemented!();
40         }
41 
42         pub(crate) fn dma_dealloc_unshare(_paddr: PhysAddr, _size: usize) {
43             unimplemented!();
44         }
45 
46         // Safety: unimplemented
47         pub(crate) unsafe fn share(_buffer: NonNull<[u8]>, _direction: BufferDirection) -> PhysAddr {
48             unimplemented!();
49         }
50 
51         // Safety: unimplemented
52         pub(crate) unsafe fn unshare(_paddr: PhysAddr, _buffer: NonNull<[u8]>, _direction: BufferDirection) {
53             unimplemented!();
54         }
55     }
56 }
57