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Kernel: Create support for PCI ECAM

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The new PCI subsystem is initialized during runtime.
PCI::Initializer is supposed to be called during early boot, to
perform a few tests, and initialize the proper configuration space
access mechanism. Kernel boot parameters can be specified by a user to
determine what tests will occur, to aid debugging on problematic
machines.
After that, PCI::Initializer should be dismissed.

PCI::IOAccess is a class that is derived from PCI::Access
class and implements PCI configuration space access mechanism via x86
IO ports.
PCI::MMIOAccess is a class that is derived from PCI::Access
and implements PCI configurtaion space access mechanism via memory
access.

The new PCI subsystem also supports determination of IO/MMIO space
needed by a device by checking a given BAR.
In addition, Every device or component that use the PCI subsystem has
changed to match the last changes.
This commit is contained in:
Liav A 2019-12-31 13:04:30 +02:00 • committed by Andreas Kling
parent d85874be4b
commit e5ffa960d7
20 changed files with 878 additions and 16 deletions
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40
Kernel/init.cpp
View file

@ -5,6 +5,9 @@
#include "Scheduler.h"
#include "kstdio.h"
#include <AK/Types.h>
#include <Kernel/ACPI/ACPIDynamicParser.h>
#include <Kernel/ACPI/ACPIStaticParser.h>
#include <Kernel/ACPI/DMIDecoder.h>
#include <Kernel/Arch/i386/APIC.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Arch/i386/PIC.h>
@ -39,7 +42,8 @@
#include <Kernel/Net/LoopbackAdapter.h>
#include <Kernel/Net/NetworkTask.h>
#include <Kernel/Net/RTL8139NetworkAdapter.h>
#include <Kernel/PCI.h>
#include <Kernel/PCI/Access.h>
#include <Kernel/PCI/Initializer.h>
#include <Kernel/TTY/PTYMultiplexer.h>
#include <Kernel/TTY/VirtualConsole.h>
#include <Kernel/VM/MemoryManager.h>
@ -245,6 +249,35 @@ extern "C" [[noreturn]] void init(u32 physical_address_for_kernel_page_tables)
new KParams(String(reinterpret_cast<const char*>(multiboot_info_ptr->cmdline)));
bool text_debug = KParams::the().has("text_debug");
bool complete_acpi_disable = KParams::the().has("noacpi");
bool dynamic_acpi_disable = KParams::the().has("noacpi_aml");
bool pci_mmio_disable = KParams::the().has("nopci_mmio");
bool pci_force_probing = KParams::the().has("pci_nodmi");
bool dmi_unreliable = KParams::the().has("dmi_unreliable");
MemoryManager::initialize(physical_address_for_kernel_page_tables);
if (dmi_unreliable) {
DMIDecoder::initialize_untrusted();
} else {
DMIDecoder::initialize();
}
if (complete_acpi_disable) {
ACPIParser::initialize_limited();
} else {
if (!dynamic_acpi_disable) {
ACPIDynamicParser::initialize_without_rsdp();
} else {
ACPIStaticParser::initialize_without_rsdp();
}
}
// Sample test to see if the ACPI parser is working...
kprintf("ACPI: HPET table @ P 0x%x\n", ACPIParser::the().find_table("HPET"));
PCI::Initializer::the().test_and_initialize(pci_mmio_disable, pci_force_probing);
PCI::Initializer::the().dismiss();
vfs = new VFS;
dev_debuglog = new DebugLogDevice;
@ -298,15 +331,14 @@ extern "C" [[noreturn]] void init(u32 physical_address_for_kernel_page_tables)
tty1 = new VirtualConsole(1);
VirtualConsole::switch_to(0);
MemoryManager::initialize(physical_address_for_kernel_page_tables);
if (APIC::init())
APIC::enable(0);
PIT::initialize();
PCI::enumerate_all([](const PCI::Address& address, PCI::ID id) {
kprintf("PCI device: bus=%d slot=%d function=%d id=%w:%w\n",
kprintf("PCI: device @ %w:%b:%b.%d [%w:%w]\n",
address.seg(),
address.bus(),
address.slot(),
address.function(),