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101 lines
4.8 KiB
C++
101 lines
4.8 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/String.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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virtual void enumerate_all(Function<void(Address, ID)>&) = 0;
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virtual u8 get_interrupt_line(Address address) { return read8_field(address, PCI_INTERRUPT_LINE); }
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virtual u32 get_BAR0(Address address) { return read32_field(address, PCI_BAR0); }
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virtual u32 get_BAR1(Address address) { return read32_field(address, PCI_BAR1); }
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virtual u32 get_BAR2(Address address) { return read32_field(address, PCI_BAR2); }
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virtual u32 get_BAR3(Address address) { return read32_field(address, PCI_BAR3); }
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virtual u32 get_BAR4(Address address) { return read32_field(address, PCI_BAR4); }
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virtual u32 get_BAR5(Address address) { return read32_field(address, PCI_BAR5); }
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virtual size_t get_BAR_Space_Size(Address address, u8 bar_number)
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{
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// See PCI Spec 2.3, Page 222
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ASSERT(bar_number < 6);
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u8 field = (PCI_BAR0 + (bar_number << 2));
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u32 bar_reserved = read32_field(address, field);
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write32_field(address, field, 0xFFFFFFFF);
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u32 space_size = read32_field(address, field);
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write32_field(address, field, bar_reserved);
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space_size &= 0xfffffff0;
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space_size = (~space_size) + 1;
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return space_size;
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}
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virtual ID get_id(Address address) final;
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virtual void enable_interrupt_line(Address address) final
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{
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write16_field(address, PCI_COMMAND, read16_field(address, PCI_COMMAND) & ~(1 << 10));
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}
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virtual void disable_interrupt_line(Address address) final
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{
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write16_field(address, PCI_COMMAND, read16_field(address, PCI_COMMAND) | 1 << 10);
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}
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virtual u8 get_revision_id(Address address) { return read8_field(address, PCI_REVISION_ID); }
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virtual u8 get_subclass(Address address) { return read8_field(address, PCI_SUBCLASS); }
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virtual u8 get_class(Address address) { return read8_field(address, PCI_CLASS); }
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virtual u16 get_subsystem_id(Address address) { return read16_field(address, PCI_SUBSYSTEM_ID); }
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virtual u16 get_subsystem_vendor_id(Address address) { return read16_field(address, PCI_SUBSYSTEM_VENDOR_ID); }
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virtual u16 read_type(Address address) { return (read8_field(address, PCI_CLASS) << 8u) | read8_field(address, PCI_SUBCLASS); }
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virtual void enable_bus_mastering(Address) final;
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virtual void disable_bus_mastering(Address) final;
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virtual void enumerate_bus(int type, u8 bus, Function<void(Address, ID)>&) final;
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virtual void enumerate_functions(int type, u8 bus, u8 slot, u8 function, Function<void(Address, ID)>& callback) final;
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virtual void enumerate_slot(int type, u8 bus, u8 slot, Function<void(Address, ID)>& callback) final;
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static Access& the();
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static bool is_initialized();
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virtual uint32_t get_segments_count() = 0;
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virtual uint8_t get_segment_start_bus(u32 segment) = 0;
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virtual uint8_t get_segment_end_bus(u32 segment) = 0;
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virtual String get_access_type() = 0;
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protected:
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Access();
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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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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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};
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}
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