Import of uvm from NetBSD. Some local changes, some code disabled

1 files changed, 181 insertions, 0 deletions

diff --git a/sys/uvm/uvm.h b/sys/uvm/uvm.h
new file mode 100644
index 00000000000..4f4d5164527
--- /dev/null
+++ b/sys/uvm/uvm.h
@@ -0,0 +1,181 @@
+/*	$NetBSD: uvm.h,v 1.13 1998/10/11 22:59:53 chuck Exp $	*/
+
+/*
+ * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!   
+ *	   >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
+ */
+
+/*
+ *
+ * Copyright (c) 1997 Charles D. Cranor and Washington University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Charles D. Cranor and
+ *      Washington University.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
+ */
+
+#ifndef _UVM_UVM_H_
+#define _UVM_UVM_H_
+
+#include <uvm/uvm_extern.h>
+
+#include <uvm/uvm_stat.h>
+
+/*
+ * pull in prototypes
+ */
+
+#include <uvm/uvm_amap.h>
+#include <uvm/uvm_aobj.h>
+#include <uvm/uvm_fault.h>
+#include <uvm/uvm_glue.h>
+#include <uvm/uvm_km.h>
+#include <uvm/uvm_loan.h>
+#include <uvm/uvm_map.h>
+#include <uvm/uvm_object.h>
+#include <uvm/uvm_page.h>
+#include <uvm/uvm_pager.h>
+#include <uvm/uvm_pdaemon.h>
+#include <uvm/uvm_swap.h>
+
+/*
+ * pull in VM_NFREELIST
+ */
+#include <machine/vmparam.h>
+
+/*
+ * uvm structure (vm global state: collected in one structure for ease
+ * of reference...)
+ */
+
+struct uvm {
+	/* vm_page related parameters */
+		/* vm_page queues */
+	struct pglist page_free[VM_NFREELIST];	/* unallocated pages */
+	struct pglist page_active;	/* allocated pages, in use */
+	struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */
+	struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */
+	simple_lock_data_t pageqlock;	/* lock for active/inactive page q */
+	simple_lock_data_t fpageqlock;	/* lock for free page q */
+		/* page daemon trigger */
+	int pagedaemon;			/* daemon sleeps on this */
+	struct proc *pagedaemon_proc;	/* daemon's pid */
+	simple_lock_data_t pagedaemon_lock;
+		/* page hash */
+	struct pglist *page_hash;	/* page hash table (vp/off->page) */
+	int page_nhash;			/* number of buckets */
+	int page_hashmask;		/* hash mask */
+	simple_lock_data_t hashlock;	/* lock on page_hash array */
+	/* anon stuff */
+	struct vm_anon *afree;		/* anon free list */
+	simple_lock_data_t afreelock; 	/* lock on anon free list */
+
+	/* static kernel map entry pool */
+	vm_map_entry_t kentry_free;	/* free page pool */
+	simple_lock_data_t kentry_lock;
+
+	/* aio_done is locked by uvm.pagedaemon_lock and splbio! */
+	struct uvm_aiohead aio_done;	/* done async i/o reqs */
+
+	/* pager VM area bounds */
+	vaddr_t pager_sva;		/* start of pager VA area */
+	vaddr_t pager_eva;		/* end of pager VA area */
+
+	/* kernel object: to support anonymous pageable kernel memory */
+	struct uvm_object *kernel_object;
+};
+
+extern struct uvm uvm;
+
+/*
+ * historys
+ */
+
+UVMHIST_DECL(maphist);
+UVMHIST_DECL(pdhist);
+
+/*
+ * vm_map_entry etype bits:
+ */
+
+#define UVM_ET_OBJ		0x01	/* it is a uvm_object */
+#define UVM_ET_SUBMAP		0x02	/* it is a vm_map submap */
+#define UVM_ET_COPYONWRITE 	0x04	/* copy_on_write */
+#define UVM_ET_NEEDSCOPY	0x08	/* needs_copy */
+
+#define UVM_ET_ISOBJ(E)		(((E)->etype & UVM_ET_OBJ) != 0)
+#define UVM_ET_ISSUBMAP(E)	(((E)->etype & UVM_ET_SUBMAP) != 0)
+#define UVM_ET_ISCOPYONWRITE(E)	(((E)->etype & UVM_ET_COPYONWRITE) != 0)
+#define UVM_ET_ISNEEDSCOPY(E)	(((E)->etype & UVM_ET_NEEDSCOPY) != 0)
+
+/*
+ * macros
+ */
+
+/*
+ * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... front end for the 
+ * (poorly named) thread_sleep_msg function.
+ */
+
+#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG)
+
+#define UVM_UNLOCK_AND_WAIT(event,lock,intr,msg, timo) \
+	thread_sleep_msg(event,lock,intr,msg, timo)
+
+#else
+
+#define UVM_UNLOCK_AND_WAIT(event,lock,intr,msg, timo) \
+	thread_sleep_msg(event,NULL,intr,msg, timo)
+
+#endif
+
+/*
+ * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
+ */
+
+#if defined(UVM_PAGE_TRKOWN)
+
+#define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
+
+#else /* UVM_PAGE_TRKOWN */
+
+#define UVM_PAGE_OWN(PG, TAG) /* nothing */
+
+#endif /* UVM_PAGE_TRKOWN */
+
+/*
+ * pull in inlines
+ */
+
+#include <uvm/uvm_amap_i.h>
+#include <uvm/uvm_fault_i.h>
+#include <uvm/uvm_map_i.h>
+#include <uvm/uvm_page_i.h>
+#include <uvm/uvm_pager_i.h>
+
+#endif /* _UVM_UVM_H_ */