Bring in NetBSD code used in the PowerPC port.

Reviewed by:	obrien, dfr
Obtained from:	NetBSD

1 files changed, 134 insertions, 0 deletions

diff --git a/sys/powerpc/include/pmap.h b/sys/powerpc/include/pmap.h
new file mode 100644
index 0000000..83adf0d
--- /dev/null
+++ b/sys/powerpc/include/pmap.h
@@ -0,0 +1,134 @@
+/*-
+ * Copyright (C) 1995, 1996 Wolfgang Solfrank.
+ * Copyright (C) 1995, 1996 TooLs GmbH.
+ * 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 TooLs GmbH.
+ * 4. The name of TooLs GmbH may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
+ *
+ *	$NetBSD: pmap.h,v 1.17 2000/03/30 16:18:24 jdolecek Exp $
+ * $FreeBSD$
+ */
+
+#ifndef	_MACHINE_PMAP_H_
+#define	_MACHINE_PMAP_H_
+
+#include <machine/pte.h>
+
+/*
+ * Segment registers
+ */
+#ifndef	LOCORE
+typedef u_int sr_t;
+#endif	/* LOCORE */
+#define	SR_TYPE		0x80000000
+#define	SR_SUKEY	0x40000000
+#define	SR_PRKEY	0x20000000
+#define	SR_VSID		0x00ffffff
+
+#ifndef LOCORE
+
+struct pv_entry {
+        struct pv_entry	*pv_next;	/* Linked list of mappings */
+        int		pv_idx;		/* Index into ptable */
+        vm_offset_t	pv_va;		/* virtual address of mapping */
+};
+
+struct md_page {
+	int	pv_list_count;
+	int	pv_flags;
+	TAILQ_HEAD(,pv_entry)	pv_list;
+};
+
+/*
+ * Pmap stuff
+ */
+struct pmap {
+	sr_t pm_sr[16];		/* segments used in this pmap */
+	int pm_refs;		/* ref count */
+	struct pmap_statistics pm_stats;	/* pmap statistics */
+};
+
+typedef	struct pmap *pmap_t;
+
+typedef struct pv_entry *pv_entry_t;
+
+#ifdef	_KERNEL
+
+#define pmap_clear_modify(pg)		(ptemodify((pg), PTE_CHG, 0))
+#define	pmap_clear_reference(pg)	(ptemodify((pg), PTE_REF, 0))
+#define	pmap_is_modified(pg)		(ptebits((pg), PTE_CHG))
+#define	pmap_is_referenced(pg)		(ptebits((pg), PTE_REF))
+#define	pmap_unwire(pm, va)
+
+#define	pmap_phys_address(x)		(x)
+
+#define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
+
+extern pmap_t		kernel_pmap;
+
+extern vm_offset_t	avail_end;
+extern vm_offset_t	avail_start;
+extern vm_offset_t	phys_avail[];
+extern vm_offset_t	virtual_avail;
+extern vm_offset_t	virtual_end;
+
+void pmap_bootstrap __P((u_int kernelstart, u_int kernelend));
+vm_offset_t pmap_steal_memory __P((vm_size_t));
+boolean_t ptemodify __P((struct vm_page *, u_int, u_int));
+int ptebits __P((struct vm_page *, int));
+
+#if 0
+#define PMAP_NEED_PROCWR
+void pmap_procwr __P((struct proc *, vaddr_t, size_t));
+#endif
+
+/*
+ * Alternate mapping hooks for pool pages.  Avoids thrashing the TLB.
+ *
+ * Note: This won't work if we have more memory than can be direct-mapped
+ * VA==PA all at once.  But pmap_copy_page() and pmap_zero_page() will have
+ * this problem, too.
+ */
+#define	PMAP_MAP_POOLPAGE(pa)	(pa)
+#define	PMAP_UNMAP_POOLPAGE(pa)	(pa)
+
+#define	vtophys(va)	pmap_kextract(((vm_offset_t) (va)))
+
+extern	pte_t	PTmap[];
+
+#define	vtopte(x)	(PTmap + powerpc_btop(x))
+
+static __inline vm_offset_t
+pmap_kextract(vm_offset_t va)
+{
+	/* XXX: coming soon... */
+	return (0);
+}
+
+#endif	/* _KERNEL */
+#endif	/* LOCORE */
+
+#endif	/* _MACHINE_PMAP_H_ */