1. Implement an optimization for pmap_remove() and pmap_protect(): if a

   substantial fraction of the number of entries of tte's in the tsb
   would need to be looked up, traverse the tsb instead. This is crucial
   in some places, e.g. when swapping out a process, where a certain
   pmap_remove() call would take very long time to complete without this.
2. Implement pmap_qenter_flags(), which will become used later
3. Reactivate the instruction cache flush done when mapping as executable.
   This is required e.g. when executing files via NFS, but is known to
   cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you
   will need to comment this call out for now.

Submitted by:	jake (3)

1 files changed, 8 insertions, 1 deletions

diff --git a/sys/sparc64/include/tsb.h b/sys/sparc64/include/tsb.h
index 9391e6077fd5..b99621717a1f 100644
--- a/sys/sparc64/include/tsb.h
+++ b/sys/sparc64/include/tsb.h
@@ -32,10 +32,13 @@
 #ifndef	_MACHINE_TSB_H_
 #define	_MACHINE_TSB_H_
 
+#define	TSB_BSHIFT			PAGE_SHIFT_8K
+#define	TSB_BSIZE			(1UL << TSB_BSHIFT)
+#define	TSB_SIZE			(TSB_BSIZE / sizeof(struct tte))
 #define	TSB_BUCKET_SHIFT		(2)
 #define	TSB_BUCKET_SIZE			(1 << TSB_BUCKET_SHIFT)
 #define	TSB_BUCKET_ADDRESS_BITS \
-	(PAGE_SHIFT_8K - TSB_BUCKET_SHIFT - TTE_SHIFT)
+	(TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
 #define	TSB_BUCKET_MASK			((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
 
 #define	TSB_KERNEL_SIZE \
@@ -70,10 +73,14 @@ tsb_kvtotte(vm_offset_t va)
 	return (tsb_kvpntotte(va >> PAGE_SHIFT));
 }
 
+typedef int (tsb_callback_t)(struct pmap *, struct tte *, vm_offset_t);
+
 struct	tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
 void	tsb_tte_remove(struct tte *stp);
 struct	tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va,
 			   struct tte tte);
 void	tsb_tte_local_remove(struct tte *tp);
+void	tsb_foreach(pmap_t pm, vm_offset_t start, vm_offset_t end,
+		    tsb_callback_t *callback);
 
 #endif /* !_MACHINE_TSB_H_ */