X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fthreads%2Finit.c;h=589661619b056a2eb40643f2b746da5a9daff15e;hb=399807640fe989ca9fc4d18343600cecefb76f50;hp=9347ad42b9ecffd5b9d155691478191b738ab831;hpb=63b811f31e550794fbbcaa75ea51b41023178f28;p=pintos-anon

diff --git a/src/threads/init.c b/src/threads/init.c
index 9347ad4..5896616 100644
--- a/src/threads/init.c
+++ b/src/threads/init.c
@@ -49,8 +49,8 @@ static bool format_filesys;
 static char *initial_program;
 #endif
 
-/* -q: Power off after running requested actions? */
-static bool do_power_off;
+/* -q: Power off after kernel tasks complete? */
+bool power_off_when_done;
 
 static void ram_init (void);
 static void paging_init (void);
@@ -74,7 +74,7 @@ main (void)
   console_init ();
 
   /* Greet user. */
-  printf ("Pintos booting with %'zd kB RAM...\n", ram_pages * PGSIZE / 1024);
+  printf ("Pintos booting with %'zu kB RAM...\n", ram_pages * PGSIZE / 1024);
 
   /* Parse command line. */
   argv_init ();
@@ -105,6 +105,7 @@ main (void)
   /* Start thread scheduler and enable interrupts. */
   thread_start ();
   serial_init_queue ();
+  timer_calibrate ();
 
 #ifdef FILESYS
   /* Initialize filesystem. */
@@ -119,13 +120,8 @@ main (void)
   /* Run a user program. */
   if (initial_program != NULL)
     {
-      tid_t tid;
       printf ("\nExecuting '%s':\n", initial_program);
-      tid = process_execute (initial_program);
-#ifdef THREAD_JOIN_IMPLEMENTED
-      if (tid != TID_ERROR)
-        thread_join (tid);
-#endif
+      process_wait (process_execute (initial_program));
     }
 #else
   /* Run the compiled-in test function. */
@@ -133,7 +129,7 @@ main (void)
 #endif
 
   /* Finish up. */
-  if (do_power_off) 
+  if (power_off_when_done) 
     power_off ();
   else 
     thread_exit ();
@@ -189,7 +185,11 @@ paging_init (void)
       pt[pte_idx] = pte_create_kernel (vaddr, true);
     }
 
-  asm volatile ("movl %0,%%cr3" :: "r" (vtop (base_page_dir)));
+  /* Store the physical address of the page directory into CR3
+     aka PDBR (page directory base register).  This activates our
+     new page tables immediately.  See [IA32-v2a] "MOV--Move
+     to/from Control Registers" and [IA32-v3] 3.7.5. */
+  asm volatile ("mov %%cr3, %0" :: "r" (vtop (base_page_dir)));
 }
 
 /* Parses the command line. */
@@ -222,10 +222,8 @@ argv_init (void)
   for (i = 0; i < argc; i++)
     if (!strcmp (argv[i], "-rs")) 
       random_init (atoi (argv[++i]));
-    else if (!strcmp (argv[i], "-d")) 
-      debug_enable (argv[++i]);
     else if (!strcmp (argv[i], "-q"))
-      do_power_off = true;
+      power_off_when_done = true;
 #ifdef USERPROG
     else if (!strcmp (argv[i], "-ex")) 
       initial_program = argv[++i];
@@ -255,8 +253,7 @@ argv_init (void)
       {
         printf (
           "Kernel options:\n"
-          " -rs SEED            Seed random seed to SEED.\n"
-          " -d CLASS[,...]      Enable the given classes of debug messages.\n"
+          " -rs SEED            Set random seed to SEED.\n"
 #ifdef USERPROG
           " -ex 'PROG [ARG...]' Run PROG, passing the optional arguments.\n"
           " -ul USER_MAX        Limit user memory to USER_MAX pages.\n"