[src/trunk]: src/sys/arch/hp700/hp700 Fix mm_md_kernacc to report correct sta...

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

details:   https://anonhg.NetBSD.org/src/rev/1df06900161b
branches:  trunk
changeset: 771882:1df06900161b
user:      skrll <skrll%NetBSD.org@localhost>
date:      Mon Dec 05 15:04:27 2011 +0000

description:
Fix mm_md_kernacc to report correct status for the direct mapped pages
between kernel start and end of physical memory.  Report everything else
as unhandled.

diffstat:

 sys/arch/hp700/hp700/machdep.c |  23 ++++++++++++++++++++---
 1 files changed, 20 insertions(+), 3 deletions(-)

diffs (44 lines):

diff -r 5ddc791a4a6c -r 1df06900161b sys/arch/hp700/hp700/machdep.c
--- a/sys/arch/hp700/hp700/machdep.c    Mon Dec 05 11:12:10 2011 +0000
+++ b/sys/arch/hp700/hp700/machdep.c    Mon Dec 05 15:04:27 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: machdep.c,v 1.100 2011/06/12 03:35:41 rmind Exp $      */
+/*     $NetBSD: machdep.c,v 1.101 2011/12/05 15:04:27 skrll Exp $      */
 
 /*-
  * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
@@ -58,7 +58,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.100 2011/06/12 03:35:41 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.101 2011/12/05 15:04:27 skrll Exp $");
 
 #include "opt_cputype.h"
 #include "opt_ddb.h"
@@ -2106,7 +2106,24 @@
 int
 mm_md_kernacc(void *ptr, vm_prot_t prot, bool *handled)
 {
+       extern int kernel_text;
+       extern int __data_start;
+       extern int end;
+
+       const vaddr_t ksro = (vaddr_t) &kernel_text;
+       const vaddr_t ksrw = (vaddr_t) &__data_start;
+       const vaddr_t kend = (vaddr_t) end;
+       const vaddr_t v = (vaddr_t)ptr;
 
        *handled = false;
-       return mm_md_physacc((paddr_t)ptr, prot);
+       if (v >= ksro && v < kend) {
+               *handled = true;
+               if (v < ksrw && (prot & VM_PROT_WRITE)) {
+                       return EFAULT;
+               }
+       } else if (v >= kend && atop((paddr_t)v) < physmem) {
+               *handled = true;
+       }
+
+       return 0;
 }