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Serenity Operating System
1/*
2 * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <Kernel/VM/ContiguousVMObject.h>
28#include <Kernel/VM/MemoryManager.h>
29#include <Kernel/VM/PhysicalPage.h>
30
31namespace Kernel {
32
33//#define CONTIGUOUS_VMOBJECT_DEBUG
34
35NonnullRefPtr<ContiguousVMObject> ContiguousVMObject::create_with_size(size_t size)
36{
37 return adopt(*new ContiguousVMObject(size));
38}
39
40ContiguousVMObject::ContiguousVMObject(size_t size)
41 : VMObject(size)
42{
43 auto contiguous_physical_pages = MM.allocate_contiguous_supervisor_physical_pages(size);
44 for (size_t i = 0; i < page_count(); i++) {
45 physical_pages()[i] = contiguous_physical_pages[i];
46#ifdef CONTIGUOUS_VMOBJECT_DEBUG
47 dbg() << "Contiguous page[" << i << "]: " << physical_pages()[i]->paddr();
48#endif
49 }
50}
51
52ContiguousVMObject::ContiguousVMObject(const ContiguousVMObject& other)
53 : VMObject(other)
54{
55}
56
57ContiguousVMObject::~ContiguousVMObject()
58{
59}
60
61NonnullRefPtr<VMObject> ContiguousVMObject::clone()
62{
63 ASSERT_NOT_REACHED();
64}
65
66}