replace ad hoc driver loading with a proper driver manager, new DDK, new PnP manager with device matching, asynchronous startup, resource ownership and removal, add shared PCI capability helpers, replace typed, rigid services with a proper service manager, implement proper system shutdown and restart, shutting down unloads drivers and shuts down services, add simple power button, remove heavyweight boot self-tests and SMP stress runs, add monotonic timestamps to kernel debug output, fruitless USB and PS/2 fixes, make test builds opt in.

code/ddk/pci_caps.c

@@ -0,0 +1,34 @@
+// Pure DDK support library routines; no kernel or module-wide state.
+
+#include <ntlite/ddk/pci_caps.h>
+
+KSTATUS NtlPciFindCapability(const NTL_PCI_CONFIG_READER* reader,
+                             uint8_t firstOffset,
+                             uint8_t capabilityId,
+                             uint8_t* outOffset) {
+    if (!reader || !reader->Read32 || !outOffset || !capabilityId)
+        return NTLSTATUS_INVALID_PARAMETER;
+
+    *outOffset = 0;
+    uint8_t current = firstOffset;
+    uint64_t visited = 0;
+
+    while (current) {
+        if (current < 0x40u || (current & 3u) != 0u)
+            return NTLSTATUS_DEVICE_ERROR;
+
+        uint64_t bit = 1ull << (current / 4u - 16u);
+        if (visited & bit)
+            return NTLSTATUS_DEVICE_ERROR;
+        visited |= bit;
+
+        uint32_t header = reader->Read32(reader->Context, current);
+        if ((uint8_t)header == capabilityId) {
+            *outOffset = current;
+            return NTLSTATUS_SUCCESS;
+        }
+        current = (uint8_t)((header >> 8) & 0xFCu);
+    }
+
+    return NTLSTATUS_NOT_FOUND;
+}