introduce a stable NTL_DDK driver ABI to replace direct HAL_API and kernel-header access in drivers, add code/kernel/io_ddk.c and code/public/ntlite/ddk/ headers, change DriverEntry to take (const NTL_DDK*, NTL_DRIVER_INIT*), update kmain to build the DDK once via IoInitializeDdk/IoGetDdk and hand it to both boot and runtime drivers, downgrade code/public/ntlite/ddi/io_driver.h to a legacy I/O model header pulling from ntlite/ddk instead of kernel internals, move code/third_party/lwip into code/drivers/net/lwip/third_party, fix up lwip_sources.txt and build.c include paths to match, split build.c's single CFLAGS macro into COMMON/KERNEL/USER/BOOT/DRIVER cflags.

code/drivers/net/rtl816x/rtl816x.c

@@ -2,7 +2,7 @@
 
 #include "rtl816x.h"
 
-const HAL_API* gHal;
+const NTL_DDK* gRtl816xDdk;
 static DRIVER_OBJECT gRtl816xDriver;
 static RTL816X_DEVICE* gRtl816xDevices[RTL816X_MAX_DEVICES];
 static uint32_t gRtl816xDeviceCount;
@@ -70,8 +70,8 @@ static KSTATUS RtlReset(RTL816X_DEVICE* r) {
     for (uint32_t i = 0; i < 1000; i++) {
         if ((RtlRead8(r, RTL_REG_CHIP_CMD) & RTL_CMD_RESET) == 0)
             return NTLSTATUS_SUCCESS;
-        if (gHal->Timer.Stall)
-            gHal->Timer.Stall(1000);
+        if (gRtl816xDdk->Timer->Stall)
+            gRtl816xDdk->Timer->Stall(1000);
     }
     return NTLSTATUS_TIMEOUT;
 }
@@ -93,10 +93,10 @@ static KSTATUS RtlAllocateDma(RTL816X_DEVICE* r) {
     if (!r->RxRingPhys || !r->TxRingPhys || !r->RxBuffersPhys || !r->TxBuffersPhys)
         return NTLSTATUS_NO_MEMORY;
 
-    r->RxRing = (RTL_DESC*)gHal->PhysToVirt(r->RxRingPhys);
-    r->TxRing = (RTL_DESC*)gHal->PhysToVirt(r->TxRingPhys);
-    r->RxBuffers = (uint8_t*)gHal->PhysToVirt(r->RxBuffersPhys);
-    r->TxBuffers = (uint8_t*)gHal->PhysToVirt(r->TxBuffersPhys);
+    r->RxRing = (RTL_DESC*)gRtl816xDdk->Memory->PhysToVirt(r->RxRingPhys);
+    r->TxRing = (RTL_DESC*)gRtl816xDdk->Memory->PhysToVirt(r->TxRingPhys);
+    r->RxBuffers = (uint8_t*)gRtl816xDdk->Memory->PhysToVirt(r->RxBuffersPhys);
+    r->TxBuffers = (uint8_t*)gRtl816xDdk->Memory->PhysToVirt(r->TxBuffersPhys);
 
     memset(r->RxRing, 0, PAGE_SIZE * RTL_RING_PAGES);
     memset(r->TxRing, 0, PAGE_SIZE * RTL_RING_PAGES);
@@ -559,12 +559,13 @@ KSTATUS Rtl816xAddDevice(DRIVER_OBJECT* driver, DEVICE_OBJECT* physicalDeviceObj
 }
 
 // Implements the driver Entry operation.
-KSTATUS DriverEntry(const HAL_API* hal) {
-    if (!hal)
+KSTATUS DriverEntry(const NTL_DDK* ddk, NTL_DRIVER_INIT* init) {
+    (void)init;
+    if (!ddk || !ddk->Memory || !ddk->Memory->PhysToVirt || !ddk->Timer)
         return NTLSTATUS_INVALID_PARAMETER;
 
     DbgPrint("RTL816X: driver loading...\n");
-    gHal = hal;
+    gRtl816xDdk = ddk;
     gRtl816xDeviceCount = 0;
 
     memset(&gRtl816xDriver, 0, sizeof(gRtl816xDriver));

code/drivers/net/rtl816x/rtl816x.h

@@ -8,17 +8,15 @@
 #include <string.h>
 #include <intrin.h>
 
-#include <ntlite/ddi/hal_api.h>
+#include <ntlite/ddk/ddk.h>
 #include <ntlite/ddi/io_driver.h>
 #include <ntlite/ddi/pci.h>
 #include <ntlite/status.h>
-#include <kernel/ke_debug.h>
-#include <kernel/ke_irq.h>
-#include <kernel/ke_dpc.h>
-#include <kernel/ke_spinlock.h>
-#include <kernel/mm_phys.h>
-#include <kernel/mm_pfn.h>
-#include <kernel/mm_virt.h>
+#include <ntlite/ddk/debug.h>
+#include <ntlite/ddk/interrupt.h>
+#include <ntlite/ddk/dpc.h>
+#include <ntlite/ddk/sync.h>
+#include <ntlite/ddk/memory.h>
 #include <ntlite/ddi/net_device.h>
 
 #define RTL_VENDOR_REALTEK 0x10ECu
@@ -147,7 +145,7 @@ typedef struct RTL816X_DEVICE {
     NET_DEVICE NetDevice;
 } RTL816X_DEVICE;
 
-extern const HAL_API* gHal;
+extern const NTL_DDK* gRtl816xDdk;
 
 KSTATUS Rtl816xAddDevice(DRIVER_OBJECT* driver, DEVICE_OBJECT* physicalDeviceObject);
 KSTATUS Rtl816xDispatchPnp(DEVICE_OBJECT* device, IRP* irp);