[src/trunk]: src/sys/arch/arm32/arm32 Prefault the u-area pages at swapin time.

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

details:   https://anonhg.NetBSD.org/src/rev/9024333b57ca
branches:  trunk
changeset: 467899:9024333b57ca
user:      mycroft <mycroft%NetBSD.org@localhost>
date:      Tue Mar 30 21:01:42 1999 +0000

description:
Prefault the u-area pages at swapin time.

diffstat:

 sys/arch/arm32/arm32/vm_machdep.c |  11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diffs (45 lines):

diff -r 912657146804 -r 9024333b57ca sys/arch/arm32/arm32/vm_machdep.c
--- a/sys/arch/arm32/arm32/vm_machdep.c Tue Mar 30 20:59:52 1999 +0000
+++ b/sys/arch/arm32/arm32/vm_machdep.c Tue Mar 30 21:01:42 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm_machdep.c,v 1.40 1999/03/30 15:13:42 mycroft Exp $  */
+/*     $NetBSD: vm_machdep.c,v 1.41 1999/03/30 21:01:42 mycroft Exp $  */
 
 /*
  * Copyright (c) 1994-1998 Mark Brinicombe.
@@ -84,6 +84,7 @@
 void   switch_exit     __P((struct proc *p, struct proc *proc0));
 extern void proc_trampoline    __P((void));
 
+int pmap_modified_emulation __P((pmap_t, vm_offset_t));
 pt_entry_t *pmap_pte   __P((pmap_t, vm_offset_t));
 
 /*
@@ -231,12 +232,19 @@
 cpu_swapin(p)
        struct proc *p;
 {
+       int i;
+
 #ifdef PMAP_DEBUG
        if (pmap_debug_level >= 0)
                printf("cpu_swapin(%p, %d, %s, %p)\n", p, p->p_pid,
                    p->p_comm, p->p_vmspace->vm_map.pmap);
 #endif /* PMAP_DEBUG */
 
+       /* Make sure the pages are *really* wired. */
+       for (i = 0; i < UPAGES; i++)
+               pmap_modified_emulation(kernel_map->pmap,
+                   (vaddr_t)p->p_addr + (i << PGSHIFT));
+
        /* Map the system page */
        pmap_enter(p->p_vmspace->vm_map.pmap, 0x00000000, systempage.pv_pa,
            VM_PROT_READ, TRUE, VM_PROT_READ);
@@ -247,6 +255,7 @@
 cpu_swapout(p)
        struct proc *p;
 {
+
 #ifdef PMAP_DEBUG
        if (pmap_debug_level >= 0)
                printf("cpu_swapout(%p, %d, %s, %p)\n", p, p->p_pid,