mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-11 01:06:01 +03:00
94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* 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.
|
|
*/
|
|
|
|
#include <Kernel/PCI/IOAccess.h>
|
|
#include <LibBareMetal/IO.h>
|
|
|
|
namespace Kernel {
|
|
|
|
void PCI::IOAccess::initialize()
|
|
{
|
|
if (!PCI::Access::is_initialized())
|
|
new PCI::IOAccess();
|
|
}
|
|
|
|
PCI::IOAccess::IOAccess()
|
|
{
|
|
kprintf("PCI: Using IO Mechanism for PCI Configuartion Space Access\n");
|
|
}
|
|
|
|
u8 PCI::IOAccess::read8_field(Address address, u32 field)
|
|
{
|
|
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
|
|
return IO::in8(PCI_VALUE_PORT + (field & 3));
|
|
}
|
|
|
|
u16 PCI::IOAccess::read16_field(Address address, u32 field)
|
|
{
|
|
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
|
|
return IO::in16(PCI_VALUE_PORT + (field & 2));
|
|
}
|
|
|
|
u32 PCI::IOAccess::read32_field(Address address, u32 field)
|
|
{
|
|
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
|
|
return IO::in32(PCI_VALUE_PORT);
|
|
}
|
|
|
|
void PCI::IOAccess::write8_field(Address address, u32 field, u8 value)
|
|
{
|
|
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
|
|
IO::out8(PCI_VALUE_PORT + (field & 3), value);
|
|
}
|
|
void PCI::IOAccess::write16_field(Address address, u32 field, u16 value)
|
|
{
|
|
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
|
|
IO::out16(PCI_VALUE_PORT + (field & 2), value);
|
|
}
|
|
void PCI::IOAccess::write32_field(Address address, u32 field, u32 value)
|
|
{
|
|
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
|
|
IO::out32(PCI_VALUE_PORT, value);
|
|
}
|
|
|
|
void PCI::IOAccess::enumerate_all(Function<void(Address, ID)>& callback)
|
|
{
|
|
// Single PCI host controller.
|
|
if ((read8_field(Address(), PCI_HEADER_TYPE) & 0x80) == 0) {
|
|
enumerate_bus(-1, 0, callback);
|
|
return;
|
|
}
|
|
|
|
// Multiple PCI host controllers.
|
|
for (u8 function = 0; function < 8; ++function) {
|
|
if (read16_field(Address(0, 0, 0, function), PCI_VENDOR_ID) == PCI_NONE)
|
|
break;
|
|
enumerate_bus(-1, function, callback);
|
|
}
|
|
}
|
|
|
|
}
|