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From: Justin Hibbits <jhibbits@FreeBSD.org>
Date: Sun, 10 Apr 2016 15:50:46 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r297785 - head/sys/powerpc/booke
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Author: jhibbits
Date: Sun Apr 10 15:50:45 2016
New Revision: 297785
URL: https://svnweb.freebsd.org/changeset/base/297785

Log:
  VM_MAXUSER_ADDRESS is highest page start, not highest address.
  
  In case a single page mapping is requested first, which might overlap the user
  address space, fix the device map block to the next page.

Modified:
  head/sys/powerpc/booke/pmap.c

Modified: head/sys/powerpc/booke/pmap.c
==============================================================================
--- head/sys/powerpc/booke/pmap.c	Sun Apr 10 15:48:09 2016	(r297784)
+++ head/sys/powerpc/booke/pmap.c	Sun Apr 10 15:50:45 2016	(r297785)
@@ -192,7 +192,7 @@ static tlb_entry_t tlb1[TLB1_MAXENTRIES]
 
 /* Next free entry in the TLB1 */
 static unsigned int tlb1_idx;
-static vm_offset_t tlb1_map_base = VM_MAXUSER_ADDRESS;
+static vm_offset_t tlb1_map_base = VM_MAXUSER_ADDRESS + PAGE_SIZE;
 
 static tlbtid_t tid_alloc(struct pmap *);
 static void tid_flush(tlbtid_t tid);