[src/trunk]: src/sys/arch/sh3 Fix pmap_prefer for topdown and turn topdown on.

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

details:   https://anonhg.NetBSD.org/src/rev/320a808bf086
branches:  trunk
changeset: 817705:320a808bf086
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Sep 03 09:07:53 2016 +0000

description:
Fix pmap_prefer for topdown and turn topdown on.

diffstat:

 sys/arch/sh3/include/pmap.h    |   6 +++---
 sys/arch/sh3/include/vmparam.h |   7 +++++--
 sys/arch/sh3/sh3/pmap.c        |  22 ++++++++++++++--------
 3 files changed, 22 insertions(+), 13 deletions(-)

diffs (96 lines):

diff -r 6d91d18c392c -r 320a808bf086 sys/arch/sh3/include/pmap.h
--- a/sys/arch/sh3/include/pmap.h       Sat Sep 03 08:47:38 2016 +0000
+++ b/sys/arch/sh3/include/pmap.h       Sat Sep 03 09:07:53 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.h,v 1.35 2010/11/14 13:33:22 uebayasi Exp $       */
+/*     $NetBSD: pmap.h,v 1.36 2016/09/03 09:07:53 christos Exp $       */
 
 /*-
  * Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -72,8 +72,8 @@
  * which have the virtually-indexed cache.
  */
 #ifdef SH4
-#define PMAP_PREFER(pa, va, sz, td)     pmap_prefer((pa), (va))
-void pmap_prefer(vaddr_t, vaddr_t *);
+#define PMAP_PREFER(pa, va, sz, td)     pmap_prefer((pa), (va), (td))
+void pmap_prefer(vaddr_t, vaddr_t *, int);
 #endif /* SH4 */
 
 #define        PMAP_MAP_POOLPAGE(pa)           SH3_PHYS_TO_P1SEG((pa))
diff -r 6d91d18c392c -r 320a808bf086 sys/arch/sh3/include/vmparam.h
--- a/sys/arch/sh3/include/vmparam.h    Sat Sep 03 08:47:38 2016 +0000
+++ b/sys/arch/sh3/include/vmparam.h    Sat Sep 03 09:07:53 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vmparam.h,v 1.21 2010/11/14 13:33:22 uebayasi Exp $    */
+/*     $NetBSD: vmparam.h,v 1.22 2016/09/03 09:07:53 christos Exp $    */
 
 /*-
  * Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -31,8 +31,11 @@
 
 #ifndef _SH3_VMPARAM_H_
 #define        _SH3_VMPARAM_H_
+
 #include <sys/queue.h>
 
+#define __USE_TOPDOWN_VM
+
 /*
  * We use 4K pages on the sh3/sh4.  Override the PAGE_* definitions
  * to be compile-time constants.
@@ -51,7 +54,7 @@
 /* top of stack */
 #define        USRSTACK                VM_MAXUSER_ADDRESS
 
-/* Virtual memory resoruce limit. */
+/* Virtual memory resource limit. */
 #define        MAXTSIZ                 (64 * 1024 * 1024)      /* max text size */
 #ifndef MAXDSIZ
 #define        MAXDSIZ                 (512 * 1024 * 1024)     /* max data size */
diff -r 6d91d18c392c -r 320a808bf086 sys/arch/sh3/sh3/pmap.c
--- a/sys/arch/sh3/sh3/pmap.c   Sat Sep 03 08:47:38 2016 +0000
+++ b/sys/arch/sh3/sh3/pmap.c   Sat Sep 03 09:07:53 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.77 2010/11/12 07:59:27 uebayasi Exp $       */
+/*     $NetBSD: pmap.c,v 1.78 2016/09/03 09:07:54 christos Exp $       */
 
 /*-
  * Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.77 2010/11/12 07:59:27 uebayasi Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.78 2016/09/03 09:07:54 christos Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -904,15 +904,21 @@
  * a virtual cache alias against vaddr_t foff.
  */
 void
-pmap_prefer(vaddr_t foff, vaddr_t *vap)
+pmap_prefer(vaddr_t foff, vaddr_t *vap, int td)
 {
-       vaddr_t va;
+       if (!SH_HAS_VIRTUAL_ALIAS) 
+               return;
+
+       vaddr_t va = *vap;
+       vsize_t d = (foff - va) & sh_cache_prefer_mask;
 
-       if (SH_HAS_VIRTUAL_ALIAS) {
-               va = *vap;
+       if (d == 0)
+               return;
 
-               *vap = va + ((foff - va) & sh_cache_prefer_mask);
-       }
+       if (td)
+               *vap = va - ((-d) & sh_cache_prefer_mask);
+       else
+               *vap = va + d;
 }
 #endif /* SH4 */