blob: db6b96785ff514083ba1ad1a752c5ce6bc87ec01 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/OwnPtr.h>
#include <AK/Types.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Storage/Ramdisk/Controller.h>
namespace Kernel {
ErrorOr<NonnullRefPtr<RamdiskController>> RamdiskController::try_initialize()
{
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) RamdiskController()));
}
ErrorOr<void> RamdiskController::reset()
{
return Error::from_errno(ENOTIMPL);
}
ErrorOr<void> RamdiskController::shutdown()
{
return Error::from_errno(ENOTIMPL);
}
size_t RamdiskController::devices_count() const
{
return m_devices.size();
}
void RamdiskController::complete_current_request(AsyncDeviceRequest::RequestResult)
{
VERIFY_NOT_REACHED();
}
RamdiskController::RamdiskController()
: StorageController(0)
{
// Populate ramdisk controllers from Multiboot boot modules, if any.
size_t count = 0;
MM.for_each_used_memory_range([&](auto& used_memory_range) {
if (used_memory_range.type == Memory::UsedMemoryRangeType::BootModule) {
size_t length = Memory::page_round_up(used_memory_range.end.get()).release_value_but_fixme_should_propagate_errors() - used_memory_range.start.get();
auto region_or_error = MM.allocate_kernel_region(used_memory_range.start, length, "Ramdisk"sv, Memory::Region::Access::ReadWrite);
if (region_or_error.is_error()) {
dmesgln("RamdiskController: Failed to allocate kernel region of size {}", length);
} else {
m_devices.append(RamdiskDevice::create(*this, region_or_error.release_value(), 6, count));
}
count++;
}
});
}
RamdiskController::~RamdiskController() = default;
LockRefPtr<StorageDevice> RamdiskController::device(u32 index) const
{
if (index >= m_devices.size())
return nullptr;
return m_devices[index];
}
}
|
