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/rtl8139/rtl8139.c

@@ -2,7 +2,7 @@
 
 #include "rtl8139.h"
 
-const HAL_API* gHal;
+const NTL_DDK* gRtl8139Ddk;
 static DRIVER_OBJECT gRtl8139Driver;
 static RTL8139_DEVICE* gRtl8139Devices[RTL8139_MAX_DEVICES];
 static uint32_t gRtl8139DeviceCount;
@@ -69,8 +69,8 @@ static KSTATUS Rtl8139Reset(RTL8139_DEVICE* r) {
     for (uint32_t i = 0; i < 1000; i++) {
         if ((Rtl8139Read8(r, RTL8139_REG_CMD) & RTL8139_CMD_RST) == 0)
             return NTLSTATUS_SUCCESS;
-        if (gHal->Timer.Stall)
-            gHal->Timer.Stall(1000);
+        if (gRtl8139Ddk->Timer->Stall)
+            gRtl8139Ddk->Timer->Stall(1000);
     }
     return NTLSTATUS_TIMEOUT;
 }
@@ -97,8 +97,8 @@ static KSTATUS Rtl8139AllocateDma(RTL8139_DEVICE* r) {
         return NTLSTATUS_NOT_SUPPORTED;
     }
 
-    r->RxBuffer = (uint8_t*)gHal->PhysToVirt(r->RxPhys);
-    r->TxBuffers = (uint8_t*)gHal->PhysToVirt(r->TxPhys);
+    r->RxBuffer = (uint8_t*)gRtl8139Ddk->Memory->PhysToVirt(r->RxPhys);
+    r->TxBuffers = (uint8_t*)gRtl8139Ddk->Memory->PhysToVirt(r->TxPhys);
     memset(r->RxBuffer, 0, PAGE_SIZE * RTL8139_RX_PAGES);
     memset(r->TxBuffers, 0, PAGE_SIZE * RTL8139_TX_PAGES);
 
@@ -553,12 +553,13 @@ KSTATUS Rtl8139AddDevice(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("RTL8139: driver loading...\n");
-    gHal = hal;
+    gRtl8139Ddk = ddk;
     gRtl8139DeviceCount = 0;
 
     memset(&gRtl8139Driver, 0, sizeof(gRtl8139Driver));