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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/String.h>
#include <Kernel/PCI/Definitions.h>
namespace Kernel {
class PCI::Access {
public:
virtual void enumerate_all(Function<void(Address, ID)>&) = 0;
virtual u8 get_interrupt_line(Address address) { return read8_field(address, PCI_INTERRUPT_LINE); }
virtual u32 get_BAR0(Address address) { return read32_field(address, PCI_BAR0); }
virtual u32 get_BAR1(Address address) { return read32_field(address, PCI_BAR1); }
virtual u32 get_BAR2(Address address) { return read32_field(address, PCI_BAR2); }
virtual u32 get_BAR3(Address address) { return read32_field(address, PCI_BAR3); }
virtual u32 get_BAR4(Address address) { return read32_field(address, PCI_BAR4); }
virtual u32 get_BAR5(Address address) { return read32_field(address, PCI_BAR5); }
virtual size_t get_BAR_Space_Size(Address address, u8 bar_number)
{
// See PCI Spec 2.3, Page 222
ASSERT(bar_number < 6);
u8 field = (PCI_BAR0 + (bar_number << 2));
u32 bar_reserved = read32_field(address, field);
write32_field(address, field, 0xFFFFFFFF);
u32 space_size = read32_field(address, field);
write32_field(address, field, bar_reserved);
space_size &= 0xfffffff0;
space_size = (~space_size) + 1;
return space_size;
}
virtual ID get_id(Address address) final;
virtual void enable_interrupt_line(Address address) final
{
write16_field(address, PCI_COMMAND, read16_field(address, PCI_COMMAND) & ~(1 << 10));
}
virtual void disable_interrupt_line(Address address) final
{
write16_field(address, PCI_COMMAND, read16_field(address, PCI_COMMAND) | 1 << 10);
}
virtual u8 get_revision_id(Address address) { return read8_field(address, PCI_REVISION_ID); }
virtual u8 get_subclass(Address address) { return read8_field(address, PCI_SUBCLASS); }
virtual u8 get_class(Address address) { return read8_field(address, PCI_CLASS); }
virtual u16 get_subsystem_id(Address address) { return read16_field(address, PCI_SUBSYSTEM_ID); }
virtual u16 get_subsystem_vendor_id(Address address) { return read16_field(address, PCI_SUBSYSTEM_VENDOR_ID); }
virtual u16 read_type(Address address) { return (read8_field(address, PCI_CLASS) << 8u) | read8_field(address, PCI_SUBCLASS); }
virtual void enable_bus_mastering(Address) final;
virtual void disable_bus_mastering(Address) final;
virtual void enumerate_bus(int type, u8 bus, Function<void(Address, ID)>&) final;
virtual void enumerate_functions(int type, u8 bus, u8 slot, u8 function, Function<void(Address, ID)>& callback) final;
virtual void enumerate_slot(int type, u8 bus, u8 slot, Function<void(Address, ID)>& callback) final;
static Access& the();
static bool is_initialized();
virtual uint32_t get_segments_count() = 0;
virtual uint8_t get_segment_start_bus(u32 segment) = 0;
virtual uint8_t get_segment_end_bus(u32 segment) = 0;
virtual String get_access_type() = 0;
virtual void write8_field(Address address, u32 field, u8 value) = 0;
virtual void write16_field(Address address, u32 field, u16 value) = 0;
virtual void write32_field(Address address, u32 field, u32 value) = 0;
protected:
Access();
virtual u8 read8_field(Address address, u32 field) = 0;
virtual u16 read16_field(Address address, u32 field) = 0;
virtual u32 read32_field(Address address, u32 field) = 0;
};
}
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