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https://github.com/SerenityOS/serenity
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0a2b00a1bf
This new subsystem is somewhat replacing the IDE disk code we had with a new flexible design. StorageDevice is a generic class that represent a generic storage device. It is meant that specific storage hardware will override the interface. StorageController is a generic class that represent a storage controller that can be found in a machine. The IDEController class governs two IDEChannels. An IDEChannel is responsible to manage the master & slave devices of the channel, therefore an IDEChannel is an IRQHandler.
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Storage/IDEController.h>
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#include <Kernel/Storage/PATADiskDevice.h>
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namespace Kernel {
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NonnullRefPtr<IDEController> IDEController::initialize(PCI::Address address, bool force_pio)
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{
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return adopt(*new IDEController(address, force_pio));
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}
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bool IDEController::reset()
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{
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TODO();
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}
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bool IDEController::shutdown()
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{
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TODO();
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}
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void IDEController::start_request(const StorageDevice&, AsyncBlockDeviceRequest&)
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{
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ASSERT_NOT_REACHED();
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}
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void IDEController::complete_current_request(AsyncDeviceRequest::RequestResult)
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{
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ASSERT_NOT_REACHED();
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}
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IDEController::IDEController(PCI::Address address, bool force_pio)
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: StorageController(address)
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{
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initialize(force_pio);
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}
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IDEController::~IDEController()
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{
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}
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void IDEController::initialize(bool force_pio)
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{
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auto bus_master_base = IOAddress(PCI::get_BAR4(pci_address()) & (~1));
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auto bar0 = PCI::get_BAR0(pci_address());
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auto base_io = (bar0 == 0x1 || bar0 == 0) ? IOAddress(0x1F0) : IOAddress(bar0);
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auto bar1 = PCI::get_BAR1(pci_address());
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auto control_io = (bar1 == 0x1 || bar1 == 0) ? IOAddress(0x3F6) : IOAddress(bar1);
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m_channels.append(IDEChannel::create(*this, { base_io, control_io, bus_master_base }, IDEChannel::ChannelType::Primary, force_pio));
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auto bar2 = PCI::get_BAR2(pci_address());
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base_io = (bar2 == 0x1 || bar2 == 0) ? IOAddress(0x170) : IOAddress(bar2);
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auto bar3 = PCI::get_BAR3(pci_address());
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control_io = (bar3 == 0x1 || bar3 == 0) ? IOAddress(0x376) : IOAddress(bar3);
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m_channels.append(IDEChannel::create(*this, { base_io, control_io, bus_master_base.offset(8) }, IDEChannel::ChannelType::Secondary, force_pio));
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}
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RefPtr<StorageDevice> IDEController::device(u32 index)
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{
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switch (index) {
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case 0:
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return m_channels[0].master_device();
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case 1:
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return m_channels[0].slave_device();
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case 2:
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return m_channels[1].master_device();
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case 3:
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return m_channels[1].slave_device();
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}
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return nullptr;
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}
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}
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