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Kernel: Add preliminary support for PCIe

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Only segment 0 is supported, but devices can now be accessed through
mmio.

Adding more segments would require adding argument to every PCI API so
it is left for later.
This commit is contained in:
Bananymous
2024-05-25 20:50:07 +03:00
parent 3b18730af6
commit 2a4d986da5
4 changed files with 328 additions and 238 deletions
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11
kernel/kernel/kernel.cpp
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@@ -176,7 +176,12 @@ static void init2(void*)
auto console = MUST(DevFileSystem::get().root_inode()->find_inode(cmdline.console));
ASSERT(console->is_tty());
((TTY*)console.ptr())->set_as_current();
static_cast<Kernel::TTY*>(console.ptr())->set_as_current();
// This only initializes PCIManager by enumerating available devices and choosing PCIe/legacy
// ACPI might require PCI access during its namespace initialization
PCI::PCIManager::initialize();
dprintln("PCI initialized");
if (ACPI::ACPI::get().enter_acpi_mode(InterruptController::get().is_using_apic()).is_error())
dprintln("Failed to enter ACPI mode");
@@ -197,8 +202,8 @@ static void init2(void*)
// NOTE: PCI devices are the last ones to be initialized
// so other devices can reserve predefined interrupts
PCI::PCIManager::initialize();
dprintln("PCI initialized");
PCI::PCIManager::get().initialize_devices();
dprintln("PCI devices initialized");
VirtualFileSystem::initialize(cmdline.root);
dprintln("VFS initialized");