mirror of
https://github.com/RGBCube/serenity
synced 2025-05-23 20:15:06 +00:00
187723776a
This reverts commit 4e0f85432a as the
ramdisk code is useful for the bring-up of the aarch64 port. Once the
kernel supports better ram-based filesystems, this code will be removed
again.
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*
|
|
* 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 {
|
|
|
|
NonnullLockRefPtr<RamdiskController> RamdiskController::initialize()
|
|
{
|
|
return adopt_lock_ref(*new RamdiskController());
|
|
}
|
|
|
|
bool RamdiskController::reset()
|
|
{
|
|
TODO();
|
|
}
|
|
|
|
bool RamdiskController::shutdown()
|
|
{
|
|
TODO();
|
|
}
|
|
|
|
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];
|
|
}
|
|
|
|
}
|