ptos: ps+hal: Add thread control block init

Signed-off-by: Chloe M <chloe@mensia.org>

service/ptos/head/arch/amd64/tcb.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Thread control block
+ * Author:      Chloe M.
+ */
+
+#ifndef _MACHINE_TCB_H_
+#define _MACHINE_TCB_H_ 1
+
+#include <ptdef.h>
+#include <machine/frame.h>
+
+/*
+ * The thread control block contains machine specific thread
+ * information.
+ *
+ * @FrameSnapshot:   Processor state snapshot
+ */
+typedef struct {
+    TRAP_FRAME FrameSnapshot;
+} TCB;
+
+#endif  /* !_MACHINE_TCB_H_ */

service/ptos/head/hal/tcb.h

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Thread control block bridge
+ * Author:      Chloe M.
+ */
+
+#ifndef _HAL_TCB_H_
+#define _HAL_TCB_H_ 1
+
+/*
+ * This header must define the TCB structure for MD
+ * thread information.
+ */
+#include <machine/tcb.h>
+
+#endif  /* !_HAL_TCB_H_ */

service/ptos/head/hal/thread.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: HAL thread management
+ * Author:      Chloe M.
+ */
+
+#ifndef _HAL_THREAD_H_
+#define _HAL_THREAD_H_ 1
+
+#include <ps/thread.h>
+#include <ptapi/status.h>
+#include <ptdef.h>
+
+/*
+ * Initialize machine specific thread information
+ *
+ * @Thread:  Thread to initialize
+ * @Flags:   Optional init flags
+ * @Ip:      Instruction pointer value to start off with
+ */
+PT_STATUS HalThreadInit(THREAD *Thread, ULONG Flags, UPTR Ip);
+
+#endif  /* !_HAL_THREAD_H_ */

service/ptos/head/ps/thread.h

@@ -10,6 +10,7 @@
 #define _PS_THREAD_H_ 1
 
 #include <ptapi/status.h>
+#include <hal/tcb.h>
 #include <ptdef.h>
 #include <queue.h>
 
@@ -22,11 +23,15 @@ struct _PROCESS;
  * processes.
  *
  * @Tid:        Thread ID
+ * @Tcb:        Thread control block
+ * @StackBase:  Execution stack base
  * @Parent:     Parent process
  * @ThreadLink: Thread queue link
  */
 typedef struct _THREAD {
     UQUAD Tid;
+    TCB Tcb;
+    UPTR StackBase;
     struct _PROCESS *Parent;
     TAILQ_ENTRY(_THREAD) ThreadLink;
 } THREAD;
@@ -36,8 +41,12 @@ typedef struct _THREAD {
  *
  * @Parent:     Parent of thread to create
  * @Flags:      Optional init flags
+ * @Ip:         Instruction pointer value to start off with
  * @Result:     Result is written here
  */
-PT_STATUS PsCreateThread(struct _PROCESS *Parent, ULONG Flags, THREAD **Result);
+PT_STATUS PsCreateThread(
+    struct _PROCESS *Parent, ULONG Flags,
+    UPTR Ip, THREAD **Result
+);
 
 #endif  /* !_PS_THREAD_H_ */