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Comments.
[pintos-anon]
/
src
/
threads
/
init.c
diff --git
a/src/threads/init.c
b/src/threads/init.c
index 741f0e42e4339b8824f16646aae237de0f365dc0..cf7a896222a5e2370b8f03827fda4fbaf9c8d4c1 100644
(file)
--- a/
src/threads/init.c
+++ b/
src/threads/init.c
@@
-105,6
+105,7
@@
main (void)
/* Start thread scheduler and enable interrupts. */
thread_start ();
serial_init_queue ();
/* Start thread scheduler and enable interrupts. */
thread_start ();
serial_init_queue ();
+ timer_calibrate ();
#ifdef FILESYS
/* Initialize filesystem. */
#ifdef FILESYS
/* Initialize filesystem. */
@@
-189,6
+190,10
@@
paging_init (void)
pt[pte_idx] = pte_create_kernel (vaddr, true);
}
pt[pte_idx] = pte_create_kernel (vaddr, true);
}
+ /* 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 ("movl %0,%%cr3" :: "r" (vtop (base_page_dir)));
}
asm volatile ("movl %0,%%cr3" :: "r" (vtop (base_page_dir)));
}