extend uvm_page_physload to have the ability to add "device" pages to the

system.

This is needed in the case where you need managed pages so you can
handle faulting and pmap_page_protect() on said pages when you manage
memory in such regions (i'm looking at you, graphics cards).

these pages are flagged PG_DEV, and shall never be on the freelists,
assert this. behaviour remains unchanged in the non-device case,
specifically for all archs currently in the tree we panic if called
after bootstrap.

ok art@, kettenis@, ariane@, beck@.

1 files changed, 10 insertions, 3 deletions

diff --git a/sys/uvm/uvm_extern.h b/sys/uvm/uvm_extern.h
index bc6a766590a..1cf804ba3d1 100644
--- a/sys/uvm/uvm_extern.h
+++ b/sys/uvm/uvm_extern.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uvm_extern.h,v 1.77 2009/06/01 17:42:33 ariane Exp $	*/
+/*	$OpenBSD: uvm_extern.h,v 1.78 2009/06/07 02:01:54 oga Exp $	*/
 /*	$NetBSD: uvm_extern.h,v 1.57 2001/03/09 01:02:12 chs Exp $	*/
 
 /*
@@ -235,6 +235,11 @@ typedef int		vm_prot_t;
 #define	UVM_LK_EXIT	0x00000002	/* leave map locked on exit */
 
 /*
+ * flags to uvm_physload.
+ */
+#define	PHYSLOAD_DEVICE	0x01	/* don't add to the page queue */
+
+/*
  * structures
  */
 
@@ -570,8 +575,10 @@ vaddr_t			uvm_pagealloc_contig(vaddr_t, vaddr_t,
 void			uvm_pagerealloc(struct vm_page *, 
 					     struct uvm_object *, voff_t);
 /* Actually, uvm_page_physload takes PF#s which need their own type */
-void			uvm_page_physload(paddr_t, paddr_t,
-					       paddr_t, paddr_t, int);
+void			uvm_page_physload_flags(paddr_t, paddr_t, paddr_t,
+			    paddr_t, int, int);
+#define uvm_page_physload(s, e, as, ae, fl)	\
+	uvm_page_physload_flags(s, e, as, ae, fl, 0)
 void			uvm_setpagesize(void);
 void			uvm_shutdown(void);