Changeset 169587a in mainline for src/mm/tlb.c

Timestamp:

2005-02-21T21:47:22Z (20 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.

File:

• src/mm/tlb.c (modified) (1 diff)

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__ */