Kernel Commandline: Change nopci_mmio to be pci_mmio

Instead of having nopci_mmio, the boot argument now is
pci_mmio='on|off'.

Kernel/init.cpp

@@ -76,6 +76,7 @@
 static void setup_serial_debug();
 static void setup_acpi();
 static void setup_vmmouse();
+static void setup_pci();
 
 VirtualConsole* tty0;
 
@@ -142,8 +143,7 @@ extern "C" [[noreturn]] void init()
  // 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(KParams::the().has("nopci_mmio"));
- PCI::Initializer::the().dismiss();
+ setup_pci();
 
  PIT::initialize();
 
@@ -437,3 +437,22 @@ void setup_vmmouse()
  kprintf("vmmouse boot argmuent has an invalid value.\n");
  hang();
 }
+
+void setup_pci()
+{
+ if (!KParams::the().has("pci_mmio")) {
+ PCI::Initializer::the().test_and_initialize(false);
+ PCI::Initializer::the().dismiss();
+ return;
+ }
+ auto pci_mmio = KParams::the().get("pci_mmio");
+ if (pci_mmio == "on") {
+ PCI::Initializer::the().test_and_initialize(false);
+ } else if (pci_mmio == "off") {
+ PCI::Initializer::the().test_and_initialize(true);
+ } else {
+ kprintf("pci_mmio boot argmuent has an invalid value.\n");
+ hang();
+ }
+ PCI::Initializer::the().dismiss();
+}