[src/trunk]: src/sys/arch/sparc64/include Implement and enable TOPDOWN_VM. Fr...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3193b8ebdc52
branches:  trunk
changeset: 328697:3193b8ebdc52
user:      martin <martin%NetBSD.org@localhost>
date:      Mon Apr 14 10:54:08 2014 +0000

description:
Implement and enable TOPDOWN_VM. From Chuck Silvers.

diffstat:

 sys/arch/sparc64/include/pmap.h    |  23 +++++++++++++++++++++--
 sys/arch/sparc64/include/vmparam.h |   4 +++-
 2 files changed, 24 insertions(+), 3 deletions(-)

diffs (56 lines):

diff -r 1cd44219c328 -r 3193b8ebdc52 sys/arch/sparc64/include/pmap.h
--- a/sys/arch/sparc64/include/pmap.h   Mon Apr 14 05:39:19 2014 +0000
+++ b/sys/arch/sparc64/include/pmap.h   Mon Apr 14 10:54:08 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.h,v 1.57 2013/12/27 21:11:19 palle Exp $  */
+/*     $NetBSD: pmap.h,v 1.58 2014/04/14 10:54:08 martin Exp $ */
 
 /*-
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -192,8 +192,27 @@
 void pmap_activate_pmap(struct pmap *);
 void pmap_update(struct pmap *);
 void pmap_bootstrap(u_long, u_long);
+
 /* make sure all page mappings are modulo 16K to prevent d$ aliasing */
-#define        PMAP_PREFER(pa, va, sz, td)     (*(va)+=(((*(va))^(pa))&(1<<(PGSHIFT))))
+#define        PMAP_PREFER(fo, va, sz, td)     pmap_prefer((fo), (va), (td))
+static inline void
+pmap_prefer(vaddr_t fo, vaddr_t *va, int td)
+{
+       vaddr_t newva;
+       vaddr_t m;
+
+       m = 2 * PAGE_SIZE;
+       newva = (*va & ~(m - 1)) | (fo & (m - 1));
+
+       if (td) {
+               if (newva > *va)
+                       newva -= m;
+       } else {
+               if (newva < *va)
+                       newva += m;
+       }
+       *va = newva;
+}
 
 #define        PMAP_GROWKERNEL         /* turn on pmap_growkernel interface */
 #define PMAP_NEED_PROCWR
diff -r 1cd44219c328 -r 3193b8ebdc52 sys/arch/sparc64/include/vmparam.h
--- a/sys/arch/sparc64/include/vmparam.h        Mon Apr 14 05:39:19 2014 +0000
+++ b/sys/arch/sparc64/include/vmparam.h        Mon Apr 14 10:54:08 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vmparam.h,v 1.33 2013/01/03 09:40:55 martin Exp $ */
+/*     $NetBSD: vmparam.h,v 1.34 2014/04/14 10:54:08 martin Exp $ */
 
 /*
  * Copyright (c) 1992, 1993
@@ -47,6 +47,8 @@
 #ifndef VMPARAM_H
 #define VMPARAM_H
 
+#define __USE_TOPDOWN_VM
+
 /*
  * We use 8K VM pages on the Sun4U.  Override the PAGE_* definitions
  * to be compile-time constants.