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https://github.com/RGBCube/serenity
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85307dd26e
Now the ACPI & PCI code is more safer, because we don't use raw pointers or references to objects or data that are located in the physical address space, so an accidental dereference cannot happen easily. Instead, we use the PhysicalAddress class to represent those addresses.
83 lines
3 KiB
C++
83 lines
3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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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#pragma once
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#include <AK/HashMap.h>
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#include <AK/OwnPtr.h>
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#include <AK/Types.h>
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#include <Kernel/ACPI/Definitions.h>
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#include <Kernel/PCI/Access.h>
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#include <Kernel/VM/AnonymousVMObject.h>
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#include <Kernel/VM/PhysicalRegion.h>
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#include <Kernel/VM/Region.h>
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#include <Kernel/VM/VMObject.h>
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namespace Kernel {
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class PCI::MMIOAccess final : public PCI::Access {
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public:
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static void initialize(PhysicalAddress mcfg);
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virtual void enumerate_all(Function<void(Address, ID)>&) override final;
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virtual String get_access_type() override final { return "MMIO-Access"; };
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virtual u32 get_segments_count();
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protected:
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explicit MMIOAccess(PhysicalAddress mcfg);
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private:
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virtual u8 read8_field(Address address, u32) override final;
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virtual u16 read16_field(Address address, u32) override final;
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virtual u32 read32_field(Address address, u32) override final;
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virtual void write8_field(Address address, u32, u8) override final;
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virtual void write16_field(Address address, u32, u16) override final;
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virtual void write32_field(Address address, u32, u32) override final;
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void map_device(Address address);
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virtual u8 get_segment_start_bus(u32);
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virtual u8 get_segment_end_bus(u32);
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PhysicalAddress m_mcfg;
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HashMap<u16, MMIOSegment*>& m_segments;
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OwnPtr<Region> m_mmio_window_region;
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PCI::ChangeableAddress m_mapped_address;
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};
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class PCI::MMIOSegment {
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public:
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MMIOSegment(PhysicalAddress, u8, u8);
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u8 get_start_bus();
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u8 get_end_bus();
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size_t get_size();
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PhysicalAddress get_paddr();
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private:
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PhysicalAddress m_base_addr;
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u8 m_start_bus;
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u8 m_end_bus;
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};
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}
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