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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.
*/
#include <Kernel/ACPI/Parser.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Net/E1000NetworkAdapter.h>
#include <Kernel/Net/RTL8139NetworkAdapter.h>
#include <Kernel/PCI/IOAccess.h>
#include <Kernel/PCI/Initializer.h>
#include <Kernel/PCI/MMIOAccess.h>
#include <LibBareMetal/IO.h>
namespace Kernel {
namespace PCI {
static bool test_pci_io();
static Access::Type detect_optimal_access_type(bool mmio_allowed)
{
if (mmio_allowed && ACPI::is_enabled() && !ACPI::Parser::the()->find_table("MCFG").is_null())
return Access::Type::MMIO;
if (test_pci_io())
return Access::Type::IO;
klog() << "No PCI bus access method detected!";
hang();
}
void initialize()
{
bool mmio_allowed = kernel_command_line().lookup("pci_mmio").value_or("off") == "on";
if (detect_optimal_access_type(mmio_allowed) == Access::Type::MMIO)
MMIOAccess::initialize(ACPI::Parser::the()->find_table("MCFG"));
else
IOAccess::initialize();
enumerate_all([&](const Address& address, ID id) {
klog() << address << " " << id;
E1000NetworkAdapter::detect(address);
RTL8139NetworkAdapter::detect(address);
});
}
bool test_pci_io()
{
klog() << "Testing PCI via manual probing... ";
u32 tmp = 0x80000000;
IO::out32(PCI_ADDRESS_PORT, tmp);
tmp = IO::in32(PCI_ADDRESS_PORT);
if (tmp == 0x80000000) {
klog() << "PCI IO Supported!";
return true;
}
klog() << "PCI IO Not Supported!";
return false;
}
}
}
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