jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/OwnPtr.h>
8#include <AK/Types.h>
9#include <Kernel/Library/LockRefPtr.h>
10#include <Kernel/Storage/Ramdisk/Controller.h>
11
12namespace Kernel {
13
14NonnullLockRefPtr<RamdiskController> RamdiskController::initialize()
15{
16 return adopt_lock_ref(*new RamdiskController());
17}
18
19bool RamdiskController::reset()
20{
21 TODO();
22}
23
24bool RamdiskController::shutdown()
25{
26 TODO();
27}
28
29size_t RamdiskController::devices_count() const
30{
31 return m_devices.size();
32}
33
34void RamdiskController::complete_current_request(AsyncDeviceRequest::RequestResult)
35{
36 VERIFY_NOT_REACHED();
37}
38
39RamdiskController::RamdiskController()
40 : StorageController(0)
41{
42 // Populate ramdisk controllers from Multiboot boot modules, if any.
43 size_t count = 0;
44 MM.for_each_used_memory_range([&](auto& used_memory_range) {
45 if (used_memory_range.type == Memory::UsedMemoryRangeType::BootModule) {
46 size_t length = Memory::page_round_up(used_memory_range.end.get()).release_value_but_fixme_should_propagate_errors() - used_memory_range.start.get();
47 auto region_or_error = MM.allocate_kernel_region(used_memory_range.start, length, "Ramdisk"sv, Memory::Region::Access::ReadWrite);
48 if (region_or_error.is_error()) {
49 dmesgln("RamdiskController: Failed to allocate kernel region of size {}", length);
50 } else {
51 m_devices.append(RamdiskDevice::create(*this, region_or_error.release_value(), 6, count));
52 }
53 count++;
54 }
55 });
56}
57
58RamdiskController::~RamdiskController() = default;
59
60LockRefPtr<StorageDevice> RamdiskController::device(u32 index) const
61{
62 if (index >= m_devices.size())
63 return nullptr;
64 return m_devices[index];
65}
66
67}