add a realtime scheduler class and priority-inheritance mutexes with timeouts and abandonment, add an HDA audio driver and a SYS_AUDIO_* syscall family, flesh out kernel32 with Win32 threads, events, mutexes, critical sections, and condition variables, add SYS_RESUME_THREAD for suspended thread creation, add KeInitializeMemoryTypes to reprogram MTRRs and install a canonical PAT for WB/WC/UC control, rework the display pipeline with a pitched present path and console output flush, bring back disk.vhd with mtools since vvfat fucking sucks, harden AHCI with serialized cache flush, USB mass storage with SCSI sense-data decoding, and xHCI with cleaner DMA teardown, fix the last stray for(;;) in HalStopProcessor to while(true), pile on smoke tests for audio, win32 sync primitives, and thread suspend, implement AHCI timeout, kill readahead since it was desperetaly trying to murder me, fix doom sound x2.

code/public/ntlite/ddi/display.h

@@ -25,7 +25,13 @@ typedef struct DISPLAY_DEVICE_OPS {
 
     KSTATUS (*Blit)(DISPLAY_DEVICE* device,
                     int x, int y, int w, int h,
-                    const uint32_t* pixels);
+                    const uint32_t* pixels,
+                    uint32_t pitchBytes);
+
+    KSTATUS (*PresentPitched)(DISPLAY_DEVICE* device,
+                              int x, int y, int w, int h,
+                              const uint32_t* pixels,
+                              uint32_t pitchBytes);
 
     KSTATUS (*FillRect)(DISPLAY_DEVICE* device,
                         int x, int y, int w, int h,

code/public/ntlite/ddi/io_driver.h

@@ -20,6 +20,7 @@ typedef void    (*DRIVER_UNLOAD_FN)(void);
 typedef struct DRIVER_OBJECT DRIVER_OBJECT;
 typedef struct DEVICE_OBJECT DEVICE_OBJECT;
 typedef struct IRP IRP;
+struct IO_DMA_ADAPTER;
 
 typedef KSTATUS (*PDRIVER_DISPATCH)(DEVICE_OBJECT* device, IRP* irp);
 typedef KSTATUS (*PDRIVER_ADD_DEVICE)(DRIVER_OBJECT* driver,
@@ -89,6 +90,7 @@ struct DEVICE_OBJECT {
     DEVICE_OBJECT*      LowerDevice;    // device directly below this FDO/filter
 
     void*               DeviceExtension;
+    struct IO_DMA_ADAPTER* DmaAdapter;
 
     uint32_t            Flags;
     uint32_t            Characteristics;
@@ -183,17 +185,6 @@ typedef struct IO_DISK_STATS {
     uint64_t WriteSectors;
     uint64_t MaxReadSectors;
     uint64_t MaxWriteSectors;
-    uint64_t ReadaheadHits;
-    uint64_t ReadaheadMisses;
-    uint64_t ReadaheadStores;
-    uint64_t ReadaheadInvalidations;
-    uint64_t ReadaheadBytesServed;
-    uint64_t ReadaheadSectorsLoaded;
-    uint64_t ReadaheadSequentialDetections;
-    uint64_t ReadaheadSuppressed;
-    uint64_t ReadaheadAllocFailures;
-    uint64_t ReadaheadReadFailures;
-    uint64_t MaxReadaheadSectors;
 } IO_DISK_STATS;
 
 __declspec(dllexport) KSTATUS IoRegisterDiskDevice(uint8_t driveIndex,
@@ -220,4 +211,5 @@ __declspec(dllexport) KSTATUS IoWriteDiskSectors(uint8_t driveIndex,
                                                  uint64_t lba,
                                                  uint32_t count,
                                                  const void* buffer);
+__declspec(dllexport) KSTATUS IoFlushDisk(uint8_t driveIndex);
 __declspec(dllexport) void IoQueryDiskStats(IO_DISK_STATS* out);