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c2ef7f740b
Also, PCI Initializer dismiss() now deletes the object correctly, and the PCI initialization process no longer use the DMI decoder to determine if PCI is supported. grub configuration files include an entry to boot the OS without ACPI support.
106 lines
No EOL
2.6 KiB
C++
106 lines
No EOL
2.6 KiB
C++
#include <Kernel/ACPI/ACPIParser.h>
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#include <Kernel/IO.h>
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#include <Kernel/KParams.h>
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#include <Kernel/PCI/IOAccess.h>
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#include <Kernel/PCI/Initializer.h>
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#include <Kernel/PCI/MMIOAccess.h>
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static PCI::Initializer* s_pci_initializer;
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PCI::Initializer& PCI::Initializer::the()
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{
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if (s_pci_initializer == nullptr) {
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s_pci_initializer = new PCI::Initializer();
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}
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return *s_pci_initializer;
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}
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void PCI::Initializer::initialize_pci_mmio_access(ACPI_RAW::MCFG& mcfg)
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{
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PCI::MMIOAccess::initialize(mcfg);
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}
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void PCI::Initializer::initialize_pci_io_access()
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{
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PCI::IOAccess::initialize();
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}
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void PCI::Initializer::test_and_initialize(bool disable_pci_mmio)
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{
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if (disable_pci_mmio) {
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if (test_pci_io()) {
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initialize_pci_io_access();
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} else {
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kprintf("No PCI Bus Access Method Detected, Halt!\n");
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ASSERT_NOT_REACHED(); // NO PCI Access ?!
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}
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return;
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}
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if (test_acpi()) {
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if (test_pci_mmio()) {
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initialize_pci_mmio_access_after_test();
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} else {
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if (test_pci_io()) {
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initialize_pci_io_access();
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} else {
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kprintf("No PCI Bus Access Method Detected, Halt!\n");
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ASSERT_NOT_REACHED(); // NO PCI Access ?!
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}
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}
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} else {
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if (test_pci_io()) {
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initialize_pci_io_access();
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} else {
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kprintf("No PCI Bus Access Method Detected, Halt!\n");
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ASSERT_NOT_REACHED(); // NO PCI Access ?!
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}
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}
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}
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PCI::Initializer::Initializer()
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{
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}
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bool PCI::Initializer::test_acpi()
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{
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if ((KParams::the().has("noacpi")) || !ACPIParser::the().is_operable())
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return false;
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else
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return true;
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}
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bool PCI::Initializer::test_pci_io()
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{
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kprintf("Testing PCI via manual probing... ");
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u32 tmp = 0x80000000;
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IO::out32(PCI_ADDRESS_PORT, tmp);
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tmp = IO::in32(PCI_ADDRESS_PORT);
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if (tmp == 0x80000000) {
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kprintf("PCI IO Supported!\n");
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return true;
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}
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kprintf("PCI IO Not Supported!\n");
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return false;
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}
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bool PCI::Initializer::test_pci_mmio()
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{
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if (ACPIParser::the().find_table("MCFG") != nullptr)
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return true;
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else
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return false;
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}
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void PCI::Initializer::initialize_pci_mmio_access_after_test()
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{
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initialize_pci_mmio_access(*(ACPI_RAW::MCFG*)(ACPIParser::the().find_table("MCFG")));
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}
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void PCI::Initializer::dismiss()
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{
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if (s_pci_initializer == nullptr)
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return;
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kprintf("PCI Subsystem Initializer dismissed.\n");
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delete s_pci_initializer;
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s_pci_initializer = nullptr;
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}
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PCI::Initializer::~Initializer()
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{
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} |