mirror of
https://github.com/RGBCube/serenity
synced 2025-05-24 21:35:06 +00:00
ac7ce12123
This was a premature optimization from the early days of SerenityOS. The eternal heap was a simple bump pointer allocator over a static byte array. My original idea was to avoid heap fragmentation and improve data locality, but both ideas were rooted in cargo culting, not data. We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting the rest. This patch replaces all kmalloc_eternal() usage by regular kmalloc().
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/*
|
|
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/OwnPtr.h>
|
|
#include <AK/RefPtr.h>
|
|
#include <AK/Types.h>
|
|
#include <Kernel/Storage/ATA/ATAController.h>
|
|
#include <Kernel/Storage/ATA/IDEChannel.h>
|
|
#include <Kernel/Storage/StorageDevice.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class AsyncBlockDeviceRequest;
|
|
|
|
class IDEController final : public ATAController
|
|
, public PCI::Device {
|
|
public:
|
|
static NonnullRefPtr<IDEController> initialize(PCI::DeviceIdentifier const&, bool force_pio);
|
|
virtual ~IDEController() override;
|
|
|
|
virtual RefPtr<StorageDevice> device(u32 index) const override;
|
|
virtual bool reset() override;
|
|
virtual bool shutdown() override;
|
|
virtual size_t devices_count() const override;
|
|
virtual void start_request(const ATADevice&, AsyncBlockDeviceRequest&) override;
|
|
virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
|
|
|
|
bool is_bus_master_capable() const;
|
|
bool is_pci_native_mode_enabled() const;
|
|
|
|
private:
|
|
bool is_pci_native_mode_enabled_on_primary_channel() const;
|
|
bool is_pci_native_mode_enabled_on_secondary_channel() const;
|
|
IDEController(PCI::DeviceIdentifier const&, bool force_pio);
|
|
|
|
RefPtr<StorageDevice> device_by_channel_and_position(u32 index) const;
|
|
void initialize(bool force_pio);
|
|
void detect_disks();
|
|
|
|
NonnullRefPtrVector<IDEChannel> m_channels;
|
|
// FIXME: Find a better way to get the ProgrammingInterface
|
|
PCI::ProgrammingInterface m_prog_if;
|
|
PCI::InterruptLine m_interrupt_line;
|
|
};
|
|
}
|