Introduce PS subsystem with IDLE process and thread creation

xtoskrnl/ps/process.cc

@@ -0,0 +1,43 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/po/process.cc
+ * DESCRIPTION:     Process Management
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.hh>
+
+
+/**
+ * Creates the global IDLE process.
+ *
+ * @param Prcb
+ *        Supplies a pointer to the Processor Control Block of the Bootstrap Processor.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+PS::Process::CreateIdleProcess(IN PKPROCESSOR_CONTROL_BLOCK Prcb)
+{
+    ULONG_PTR PageDirectory[2];
+    PKPROCESS IdleProcess;
+    PKTHREAD IdleThread;
+
+    /* Get initial IDLE thread */
+    IdleThread = Prcb->CurrentThread;
+
+    /* Get initial IDLE process */
+    IdleProcess = IdleThread->ApcState.Process;
+
+    /* Setup placeholder for page directory entries */
+    PageDirectory[0] = 0;
+    PageDirectory[1] = 0;
+
+    /* Initialize Idle process and Idle thread */
+    KE::KProcess::InitializeIdleProcess(IdleProcess, PageDirectory);
+    KE::KThread::InitializeIdleThread(IdleProcess, IdleThread, Prcb, AR::ProcessorSupport::GetBootStack());
+}