initial import of NetBSD tree

1 files changed, 178 insertions, 0 deletions

diff --git a/sys/arch/alpha/include/vmparam.h b/sys/arch/alpha/include/vmparam.h
new file mode 100644
index 00000000000..fa2b0360940
--- /dev/null
+++ b/sys/arch/alpha/include/vmparam.h
@@ -0,0 +1,178 @@
+/*	$NetBSD: vmparam.h,v 1.1 1995/02/13 23:08:01 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1988 University of Utah.
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * the Systems Programming Group of the University of Utah Computer
+ * Science Department and Ralph Campbell.
+ *
+ * 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 the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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: Utah $Hdr: vmparam.h 1.16 91/01/18$
+ *
+ *	@(#)vmparam.h	8.2 (Berkeley) 4/22/94
+ */
+
+/*
+ * Machine dependent constants for Alpha.
+ */
+/*
+ * USRTEXT is the start of the user text/data space, while USRSTACK
+ * is the top (end) of the user stack.  Immediately above the user stack
+ * resides the user structure, which is UPAGES long and contains the
+ * kernel stack.
+ */
+#define	USRTEXT		CLBYTES
+#define	USRSTACK	VM_MAXUSER_ADDRESS
+
+/*
+ * Virtual memory related constants, all in bytes
+ */
+#ifndef MAXTSIZ
+#define	MAXTSIZ		(1<<30)			/* max text size (1G) */
+#endif
+#ifndef DFLDSIZ
+#define	DFLDSIZ		(1<<27)			/* initial data size (128M) */
+#endif
+#ifndef MAXDSIZ
+#define	MAXDSIZ		(1<<30)			/* max data size (1G) */
+#endif
+#ifndef	DFLSSIZ
+#define	DFLSSIZ		(1<<21)			/* initial stack size (2M) */
+#endif
+#ifndef	MAXSSIZ
+#define	MAXSSIZ		(1<<25)			/* max stack size (32M) */
+#endif
+
+/*
+ * Default sizes of swap allocation chunks (see dmap.h).
+ * The actual values may be changed in vminit() based on MAXDSIZ.
+ * With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024.
+ * DMMIN should be at least ctod(1) so that vtod() works.
+ * vminit() insures this.
+ */
+#define	DMMIN	32			/* smallest swap allocation */
+#define	DMMAX	4096			/* largest potential swap allocation */
+
+#ifdef THESE_ARE_WRONG
+/*
+ * Sizes of the system and user portions of the system page table.
+ */
+/* SYSPTSIZE IS SILLY; (really number of buffers for I/O) */
+#define	SYSPTSIZE	1228
+#define	USRPTSIZE 	1024
+#endif /* WRONG */
+
+/*
+ * PTEs for mapping user space into the kernel for phyio operations.
+ * 64 pte's are enough to cover 8 disks * MAXBSIZE.
+ */
+#ifndef USRIOSIZE
+#define USRIOSIZE	64
+#endif
+
+/*
+ * PTEs for system V style shared memory.
+ * This is basically slop for kmempt which we actually allocate (malloc) from.
+ */
+#ifndef SHMMAXPGS
+#define SHMMAXPGS	1024		/* 8mb */
+#endif
+
+/*
+ * Boundary at which to place first MAPMEM segment if not explicitly
+ * specified.  Should be a power of two.  This allows some slop for
+ * the data segment to grow underneath the first mapped segment.
+ */
+#define MMSEG		0x200000
+
+/*
+ * The size of the clock loop.
+ */
+#define	LOOPPAGES	(maxfree - firstfree)
+
+/*
+ * The time for a process to be blocked before being very swappable.
+ * This is a number of seconds which the system takes as being a non-trivial
+ * amount of real time.  You probably shouldn't change this;
+ * it is used in subtle ways (fractions and multiples of it are, that is, like
+ * half of a ``long time'', almost a long time, etc.)
+ * It is related to human patience and other factors which don't really
+ * change over time.
+ */
+#define	MAXSLP 		20
+
+/*
+ * A swapped in process is given a small amount of core without being bothered
+ * by the page replacement algorithm.  Basically this says that if you are
+ * swapped in you deserve some resources.  We protect the last SAFERSS
+ * pages against paging and will just swap you out rather than paging you.
+ * Note that each process has at least UPAGES+CLSIZE pages which are not
+ * paged anyways (this is currently 8+2=10 pages or 5k bytes), so this
+ * number just means a swapped in process is given around 25k bytes.
+ * Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81),
+ * so we loan each swapped in process memory worth 100$, or just admit
+ * that we don't consider it worthwhile and swap it out to disk which costs
+ * $30/mb or about $0.75.
+ */
+#define	SAFERSS		4		/* nominal ``small'' resident set size
+					   protected against replacement */
+
+#ifdef THESE_ARE_WRONG
+#define	mapin(pte, v, pfnum, prot) \
+	(*(int *)(pte) = ((pfnum) << PG_SHIFT) | (prot), MachTLBFlushAddr(v))
+#endif /* WRONG */
+
+/*
+ * Mach derived constants
+ */
+
+/* user/kernel map constants */
+#define VM_MIN_ADDRESS		((vm_offset_t)0x0000000000000000) /* 0 */
+#define VM_MAXUSER_ADDRESS	((vm_offset_t)0x0000000200000000) /* 8G */
+#define VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
+#define VM_MIN_KERNEL_ADDRESS	((vm_offset_t)0xfffffe0000000000)
+#define VM_MAX_KERNEL_ADDRESS	((vm_offset_t)0xffffffffffffffff)
+
+/* virtual sizes (bytes) for various kernel submaps */
+#define VM_MBUF_SIZE		(NMBCLUSTERS*MCLBYTES)
+#define VM_KMEM_SIZE		(NKMEMCLUSTERS*CLBYTES)
+#define VM_PHYS_SIZE		(USRIOSIZE*CLBYTES)
+
+/* some Alpha-specific constants */
+#define	VM_MAX_PHYSADDR	((vm_offset_t)0x0000000080000000) /* max phys addr */
+#define	VPTBASE		((vm_offset_t)0xfffffffc00000000) /* Virt. pg table */
+
+#ifdef THESE_ARE_WRONG
+/* pcb base */
+#define	pcbb(p)		((u_int)(p)->p_addr)
+#endif /* WRONG */