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From: Warner Losh <imp@FreeBSD.org>
Date: Fri, 6 Dec 2013 18:41:16 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r259039 - head/sys/arm/at91
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Author: imp
Date: Fri Dec  6 18:41:16 2013
New Revision: 259039
URL: http://svnweb.freebsd.org/changeset/base/259039

Log:
  Although not strictly required to boot a 64MB board, bump
  vm_max_virtual_address to be KERNVIRTADDR + 256MB. This allows some
  future shock protection since the KVA requirements have gone up since
  the unmapped changes have gone in, as well as preventing us from
  overlapping with the hardware devices, which we map at 0xd0000000,
  which we'd hit with anything more than 85MB...
  
  MFC after:	3 days

Modified:
  head/sys/arm/at91/at91_machdep.c

Modified: head/sys/arm/at91/at91_machdep.c
==============================================================================
--- head/sys/arm/at91/at91_machdep.c	Fri Dec  6 18:32:03 2013	(r259038)
+++ head/sys/arm/at91/at91_machdep.c	Fri Dec  6 18:41:16 2013	(r259039)
@@ -633,7 +633,8 @@ initarm(struct arm_boot_params *abp)
 
 	pmap_curmaxkvaddr = afterkern + L1_S_SIZE * (KERNEL_PT_KERN_NUM - 1);
 	arm_dump_avail_init(memsize, sizeof(dump_avail)/sizeof(dump_avail[0]));
-	vm_max_kernel_address = KERNVIRTADDR + 3 * memsize;
+	/* Always use the 256MB of KVA we have available between the kernel and devices */
+	vm_max_kernel_address = KERNVIRTADDR + (256 << 20);
 	pmap_bootstrap(freemempos, &kernel_l1pt);
 	msgbufp = (void*)msgbufpv.pv_va;
 	msgbufinit(msgbufp, msgbufsize);