[src/trunk]: src/sys/arch/alpha/alpha No longer need to pmap_emulate_referenc...

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

details:   https://anonhg.NetBSD.org/src/rev/f6256c3fc22a
branches:  trunk
changeset: 473228:f6256c3fc22a
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Wed May 26 00:37:40 1999 +0000

description:
No longer need to pmap_emulate_reference() in cpu_fork() or cpu_swapin(),
since uvm_fault_wire() does the right thing with access_type.

diffstat:

 sys/arch/alpha/alpha/vm_machdep.c |  26 ++------------------------
 1 files changed, 2 insertions(+), 24 deletions(-)

diffs (67 lines):

diff -r 35dc00880022 -r f6256c3fc22a sys/arch/alpha/alpha/vm_machdep.c
--- a/sys/arch/alpha/alpha/vm_machdep.c Wed May 26 00:36:53 1999 +0000
+++ b/sys/arch/alpha/alpha/vm_machdep.c Wed May 26 00:37:40 1999 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: vm_machdep.c,v 1.47 1999/05/16 22:24:16 thorpej Exp $ */
+/* $NetBSD: vm_machdep.c,v 1.48 1999/05/26 00:37:40 thorpej Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.47 1999/05/16 22:24:16 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.48 1999/05/26 00:37:40 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -145,7 +145,6 @@
        size_t stacksize;
 {
        struct user *up = p2->p_addr;
-       int i;
 
        p2->p_md.md_tf = p1->p_md.md_tf;
        p2->p_md.md_flags = p1->p_md.md_flags & MDP_FPUSED;
@@ -157,16 +156,6 @@
        p2->p_md.md_pcbpaddr = (void *)vtophys((vaddr_t)&up->u_pcb);
 
        /*
-        * Simulate a write to the process's U-area pages,
-        * so that the system doesn't lose badly.
-        * (If this isn't done, the kernel can't read or
-        * write the kernel stack.  "Ouch!")
-        */
-       for (i = 0; i < UPAGES; i++)
-               pmap_emulate_reference(p2, (vaddr_t)up + i * PAGE_SIZE,
-                   0, 1);
-
-       /*
         * Copy floating point state from the FP chip to the PCB
         * if this process has state stored there.
         */
@@ -286,23 +275,12 @@
        register struct proc *p;
 {
        struct user *up = p->p_addr;
-       int i;
 
        /*
         * Cache the physical address of the pcb, so we can swap to
         * it easily.
         */
        p->p_md.md_pcbpaddr = (void *)vtophys((vaddr_t)&up->u_pcb);
-
-       /*
-        * Simulate a write to the process's U-area pages,
-        * so that the system doesn't lose badly.
-        * (If this isn't done, the kernel can't read or
-        * write the kernel stack.  "Ouch!")
-        */
-       for (i = 0; i < UPAGES; i++)
-               pmap_emulate_reference(p, (vaddr_t)up + i * PAGE_SIZE,
-                   0, 1);
 }
 
 /*