mirror of
https://github.com/RGBCube/serenity
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6131048a5f
Instead of mapping a 4KB region to access device configuration space each time we call one of the PCI helpers, just map them once during the boot process. Then, if we request to access one of those devices, we can ask the PCI subsystem to give us the virtual address where the device's configuration space is mapped.
75 lines
2.9 KiB
C++
75 lines
2.9 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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#pragma once
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <Kernel/PCI/Definitions.h>
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namespace Kernel {
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class PCI::Access {
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public:
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enum class Type {
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IO,
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MMIO,
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};
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void enumerate(Function<void(Address, ID)>&) const;
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void enumerate_bus(int type, u8 bus, Function<void(Address, ID)>&);
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void enumerate_functions(int type, u8 bus, u8 slot, u8 function, Function<void(Address, ID)>& callback);
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void enumerate_slot(int type, u8 bus, u8 slot, Function<void(Address, ID)>& callback);
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static Access& the();
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static bool is_initialized();
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virtual uint32_t segment_count() const = 0;
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virtual uint8_t segment_start_bus(u32 segment) const = 0;
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virtual uint8_t segment_end_bus(u32 segment) const = 0;
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virtual const char* access_type() const = 0;
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virtual void write8_field(Address address, u32 field, u8 value) = 0;
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virtual void write16_field(Address address, u32 field, u16 value) = 0;
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virtual void write32_field(Address address, u32 field, u32 value) = 0;
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virtual u8 read8_field(Address address, u32 field) = 0;
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virtual u16 read16_field(Address address, u32 field) = 0;
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virtual u32 read32_field(Address address, u32 field) = 0;
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protected:
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virtual void enumerate_hardware(Function<void(Address, ID)>) = 0;
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u8 early_read8_field(Address address, u32 field);
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u16 early_read16_field(Address address, u32 field);
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u32 early_read32_field(Address address, u32 field);
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u16 early_read_type(Address address);
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Access();
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Vector<PhysicalID> m_physical_ids;
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};
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}
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