Changeset 169587a in mainline for src

Timestamp:

2005-02-21T21:47:22Z (21 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b109ebb

Parents:

0ded477

Message:

TLB shootdown.

Location:

src

Files:

• main/main.c (modified) (2 diffs)
• mm/tlb.c (modified) (1 diff)
• mm/vm.c (modified) (4 diffs)

src/main/main.c

@@ -47 +47 @@
 #include <mm/frame.h>
 #include <mm/page.h>
+#include <mm/tlb.h>
 #include <synch/waitq.h>
 
@@ -111 +112 @@
         frame_init();
         page_init();
+        tlb_init();
 
         #ifdef __SMP__

src/mm/tlb.c

@@ -28 +28 @@
 
 #include <mm/tlb.h>
+#include <synch/spinlock.h>
+#include <typedefs.h>
+#include <arch/atomic.h>
+#include <config.h>
 
-void tlb_shutdown(void)
+#ifdef __SMP__
+static spinlock_t tlblock;
+static volatile int tlb_shutdown_cnt;
+
+void tlb_init(void)
 {
-        /* TODO: implement tlb_shutdown */
+        spinlock_initialize(&tlblock);
+        tlb_shutdown_cnt = 0;
 }
+
+/* must be called with interrupts disabled */
+void tlb_shutdown_start(void)
+{
+        spinlock_lock(&tlblock);
+        tlb_shutdown_ipi_send();
+        
+        while (tlb_shutdown_cnt < config.cpu_active - 1)
+                ;
+                
+        tlb_shutdown_cnt = 0;
+}
+
+void tlb_shutdown_finalize(void)
+{
+        spinlock_unlock(&tlblock);
+}
+
+void tlb_shutdown_ipi_recv(void)
+{
+        atomic_inc((int *) &tlb_shutdown_cnt);
+        spinlock_lock(&tlblock);
+        spinlock_unlock(&tlblock);
+        tlb_invalidate(0);      /* TODO: use valid ASID */
+}
+#endif /* __SMP__ */

src/mm/vm.c

@@ -30 +30 @@
 #include <mm/page.h>
 #include <mm/frame.h>
+#include <mm/tlb.h>
 #include <arch/mm/page.h>
 #include <arch/types.h>
@@ -143 +144 @@
         for (i=0; i<a->size; i++)               
                 map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, 0);
-                
+        
         spinlock_unlock(&a->lock);
         cpu_priority_restore(pri);
@@ -169 +170 @@
         
         pri = cpu_priority_high();
+
+        tlb_shutdown_start();
+
         spinlock_lock(&m->lock);
 
@@ -175 +179 @@
 
         spinlock_unlock(&m->lock);
+
+        tlb_invalidate(0);
+        tlb_shutdown_finalize();
+
         cpu_priority_restore(pri);
 }