[src/trunk]: src/sys/uvm/pmap Add virtual_start to pmap_limits. This allows ...

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

details:   https://anonhg.NetBSD.org/src/rev/cfeaa97fd22c
branches:  trunk
changeset: 338834:cfeaa97fd22c
user:      matt <matt%NetBSD.org@localhost>
date:      Thu Jun 11 05:27:07 2015 +0000

description:
Add virtual_start to pmap_limits.  This allows MD to steal address space
before pmap_bootstrap.

diffstat:

 sys/uvm/pmap/pmap.c |  12 +++++++-----
 sys/uvm/pmap/pmap.h |   3 ++-
 2 files changed, 9 insertions(+), 6 deletions(-)

diffs (57 lines):

diff -r 832f992f9e64 -r cfeaa97fd22c sys/uvm/pmap/pmap.c
--- a/sys/uvm/pmap/pmap.c       Thu Jun 11 05:22:55 2015 +0000
+++ b/sys/uvm/pmap/pmap.c       Thu Jun 11 05:27:07 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.11 2015/02/03 10:25:53 nonaka Exp $ */
+/*     $NetBSD: pmap.c,v 1.12 2015/06/11 05:27:07 matt Exp $   */
 
 /*-
  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.11 2015/02/03 10:25:53 nonaka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.12 2015/06/11 05:27:07 matt Exp $");
 
 /*
  *     Manages physical address maps.
@@ -214,7 +214,9 @@
 
 struct pmap * const kernel_pmap_ptr = &kernel_pmap_store.kernel_pmap;
 
-struct pmap_limits pmap_limits;
+struct pmap_limits pmap_limits = {
+       .virtual_start = VM_MIN_KERNEL_ADDRESS,
+};
 
 #ifdef UVMHIST
 static struct kern_history_ent pmapexechistbuf[10000];
@@ -351,8 +353,8 @@
 pmap_virtual_space(vaddr_t *vstartp, vaddr_t *vendp)
 {
 
-       *vstartp = VM_MIN_KERNEL_ADDRESS;
-       *vendp = VM_MAX_KERNEL_ADDRESS;
+       *vstartp = pmap_limits.virtual_start;
+       *vendp = pmap_limits.virtual_end;
 }
 
 vaddr_t
diff -r 832f992f9e64 -r cfeaa97fd22c sys/uvm/pmap/pmap.h
--- a/sys/uvm/pmap/pmap.h       Thu Jun 11 05:22:55 2015 +0000
+++ b/sys/uvm/pmap/pmap.h       Thu Jun 11 05:27:07 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.h,v 1.4 2014/03/18 18:20:44 riastradh Exp $       */
+/*     $NetBSD: pmap.h,v 1.5 2015/06/11 05:27:07 matt Exp $    */
 
 /*
  * Copyright (c) 1992, 1993
@@ -148,6 +148,7 @@
 struct pmap_limits {
        paddr_t avail_start;
        paddr_t avail_end;
+       vaddr_t virtual_start;
        vaddr_t virtual_end;
 };