[src/trunk]: src/sys/arch/amd64/amd64 In pmap_map(), do not do TLB shootdowns...

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

details:   https://anonhg.NetBSD.org/src/rev/e8bda006cf34
branches:  trunk
changeset: 583394:e8bda006cf34
user:      fvdl <fvdl%NetBSD.org@localhost>
date:      Thu Aug 04 19:29:26 2005 +0000

description:
In pmap_map(), do not do TLB shootdowns. It is only used for kernel dumps,
at which point other CPUs are likely halted, and the addresses mappped
are temporary anyway.

diffstat:

 sys/arch/amd64/amd64/pmap.c |  17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diffs (48 lines):

diff -r b0d76224cc20 -r e8bda006cf34 sys/arch/amd64/amd64/pmap.c
--- a/sys/arch/amd64/amd64/pmap.c       Thu Aug 04 19:26:02 2005 +0000
+++ b/sys/arch/amd64/amd64/pmap.c       Thu Aug 04 19:29:26 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.21 2005/07/04 12:06:14 blymn Exp $  */
+/*     $NetBSD: pmap.c,v 1.22 2005/08/04 19:29:26 fvdl Exp $   */
 
 /*
  *
@@ -108,7 +108,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.21 2005/07/04 12:06:14 blymn Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.22 2005/08/04 19:29:26 fvdl Exp $");
 
 #ifndef __x86_64__
 #include "opt_cputype.h"
@@ -2250,9 +2250,10 @@
 }
 
 /*
- * pmap_map: map a range of PAs into kvm
+ * pmap_map: map a range of PAs into kvm.
  *
  * => used during crash dump
+ * => does not do TLB shootdowns
  * => XXX: pmap_map() should be phased out?
  */
 
@@ -2262,8 +2263,16 @@
        paddr_t spa, epa;
        vm_prot_t prot;
 {
+       pt_entry_t *pte, opte, npte;
+
        while (spa < epa) {
-               pmap_enter(pmap_kernel(), va, spa, prot, 0);
+               pte = kvtopte(va);
+
+               npte = spa | ((prot & VM_PROT_WRITE) ? PG_RW : PG_RO) |
+                   PG_V | pmap_pg_g;
+               opte = pmap_pte_set(pte, npte);
+               if (pmap_valid_entry(opte))
+                       pmap_update_pg(va);
                va += PAGE_SIZE;
                spa += PAGE_SIZE;
        }