jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/Bitmap.h>
10#include <AK/Vector.h>
11#include <Kernel/Bus/PCI/Controller/HostController.h>
12#include <Kernel/Locking/Spinlock.h>
13#include <Kernel/Memory/Region.h>
14
15namespace Kernel::PCI {
16
17class MemoryBackedHostBridge : public HostController {
18public:
19 static NonnullOwnPtr<MemoryBackedHostBridge> must_create(Domain const&, PhysicalAddress);
20
21 virtual void write8_field(BusNumber, DeviceNumber, FunctionNumber, u32 field, u8 value) override;
22 virtual void write16_field(BusNumber, DeviceNumber, FunctionNumber, u32 field, u16 value) override;
23 virtual void write32_field(BusNumber, DeviceNumber, FunctionNumber, u32 field, u32 value) override;
24
25 virtual u8 read8_field(BusNumber, DeviceNumber, FunctionNumber, u32 field) override;
26 virtual u16 read16_field(BusNumber, DeviceNumber, FunctionNumber, u32 field) override;
27 virtual u32 read32_field(BusNumber, DeviceNumber, FunctionNumber, u32 field) override;
28
29protected:
30 MemoryBackedHostBridge(PCI::Domain const&, PhysicalAddress);
31
32 // Memory-mapped access operations
33 void map_bus_region(BusNumber);
34 VirtualAddress get_device_configuration_memory_mapped_space(BusNumber, DeviceNumber, FunctionNumber);
35 PhysicalAddress determine_memory_mapped_bus_base_address(BusNumber) const;
36
37 // Data-members for accessing Memory mapped PCI devices' configuration spaces
38 BusNumber m_mapped_bus { 0 };
39 OwnPtr<Memory::Region> m_mapped_bus_region;
40 PhysicalAddress m_start_address;
41};
42
43}