initial import of NetBSD tree

1 files changed, 161 insertions, 0 deletions

diff --git a/sys/arch/hp300/include/pmap.h b/sys/arch/hp300/include/pmap.h
new file mode 100644
index 00000000000..073d68743bb
--- /dev/null
+++ b/sys/arch/hp300/include/pmap.h
@@ -0,0 +1,161 @@
+/*	$NetBSD: pmap.h,v 1.9 1995/05/11 16:53:03 jtc Exp $	*/
+
+/* 
+ * Copyright (c) 1987 Carnegie-Mellon University
+ * Copyright (c) 1991, 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.
+ *
+ * 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.
+ *
+ *	@(#)pmap.h	8.1 (Berkeley) 6/10/93
+ */
+
+#ifndef	_HP300_PMAP_H_
+#define	_HP300_PMAP_H_
+
+#include <machine/pte.h>
+
+#if defined(HP380)
+#define HP_SEG_SIZE	(mmutype == MMU_68040 ? 0x40000 : NBSEG)
+#else
+#define HP_SEG_SIZE	NBSEG
+#endif
+
+#define hp300_trunc_seg(x)	(((unsigned)(x)) & ~(HP_SEG_SIZE-1))
+#define hp300_round_seg(x)	hp300_trunc_seg((unsigned)(x) + HP_SEG_SIZE-1)
+
+/*
+ * Pmap stuff
+ */
+struct pmap {
+	pt_entry_t		*pm_ptab;	/* KVA of page table */
+	st_entry_t		*pm_stab;	/* KVA of segment table */
+	int			pm_stchanged;	/* ST changed */
+	int			pm_stfree;	/* 040: free lev2 blocks */
+	st_entry_t		*pm_stpa;	/* 040: ST phys addr */
+	short			pm_sref;	/* segment table ref count */
+	short			pm_count;	/* pmap reference count */
+	simple_lock_data_t	pm_lock;	/* lock on pmap */
+	struct pmap_statistics	pm_stats;	/* pmap statistics */
+	long			pm_ptpages;	/* more stats: PT pages */
+};
+
+typedef struct pmap	*pmap_t;
+
+/*
+ * On the 040 we keep track of which level 2 blocks are already in use
+ * with the pm_stfree mask.  Bits are arranged from LSB (block 0) to MSB
+ * (block 31).  For convenience, the level 1 table is considered to be
+ * block 0.
+ *
+ * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed.
+ * for the kernel and users.  8 implies only the initial "segment table"
+ * page is used.  WARNING: don't change MAXUL2SIZE unless you can allocate
+ * physically contiguous pages for the ST in pmap.c!
+ */
+#define	MAXKL2SIZE	32
+#define MAXUL2SIZE	8
+#define l2tobm(n)	(1 << (n))
+#define	bmtol2(n)	(ffs(n) - 1)
+
+/*
+ * Macros for speed
+ */
+#define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
+	if ((pmapp)->pm_stchanged) { \
+		(pcbp)->pcb_ustp = hp300_btop((vm_offset_t)(pmapp)->pm_stpa); \
+		if (iscurproc) \
+			loadustp((pcbp)->pcb_ustp); \
+		(pmapp)->pm_stchanged = FALSE; \
+	}
+#define PMAP_DEACTIVATE(pmapp, pcbp)
+
+/*
+ * For each vm_page_t, there is a list of all currently valid virtual
+ * mappings of that page.  An entry is a pv_entry, the list is pv_table.
+ */
+struct pv_entry {
+	struct pv_entry	*pv_next;	/* next pv_entry */
+	struct pmap	*pv_pmap;	/* pmap where mapping lies */
+	vm_offset_t	pv_va;		/* virtual address for mapping */
+	st_entry_t	*pv_ptste;	/* non-zero if VA maps a PT page */
+	struct pmap	*pv_ptpmap;	/* if pv_ptste, pmap for PT page */
+	int		pv_flags;	/* flags */
+};
+
+#define	PV_CI		0x01	/* header: all entries are cache inhibited */
+#define PV_PTPAGE	0x02	/* header: entry maps a page table page */
+
+struct pv_page;
+
+struct pv_page_info {
+	TAILQ_ENTRY(pv_page) pgi_list;
+	struct pv_entry *pgi_freelist;
+	int pgi_nfree;
+};
+
+/*
+ * This is basically:
+ * ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
+ */
+#define	NPVPPG	170
+
+struct pv_page {
+	struct pv_page_info pvp_pgi;
+	struct pv_entry pvp_pv[NPVPPG];
+};
+
+#ifdef	_KERNEL
+#if defined(HP320) || defined(HP350)
+#define	HAVEVAC				/* include cheezy VAC support */
+#endif
+
+extern struct pmap	kernel_pmap_store;
+
+#define pmap_kernel()	(&kernel_pmap_store)
+#define	active_pmap(pm) \
+	((pm) == pmap_kernel() || (pm) == curproc->p_vmspace->vm_map.pmap)
+
+extern struct pv_entry	*pv_table;	/* array of entries, one per page */
+
+#define pmap_page_index(pa)		atop(pa - vm_first_phys)
+#define pa_to_pvh(pa)			(&pv_table[pmap_page_index(pa)])
+
+#define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
+#define	pmap_wired_count(pmap)		((pmap)->pm_stats.wired_count)
+
+extern pt_entry_t	*Sysmap;
+extern char		*vmmap;		/* map for mem, dumps, etc. */
+#endif /* _KERNEL */
+
+#endif /* !_HP300_PMAP_H_ */