slb.h revision 209975 
1/*-
2 * Copyright (C) 2009 Nathan Whitehorn
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/powerpc/include/slb.h 209975 2010-07-13 05:32:19Z nwhitehorn $
26 */
27
28#ifndef _MACHINE_SLB_H_
29#define	_MACHINE_SLB_H_
30
31/*
32 * Bit definitions for segment lookaside buffer entries.
33 *
34 * PowerPC Microprocessor Family: The Programming Environments for 64-bit
35 * Microprocessors, section 7.4.2.1
36 *
37 * Note that these bitmasks are relative to the values for one of the two
38 * values for slbmte, slbmfee, and slbmfev, not the internal SLB
39 * representation.
40 */
41
42#define	SLBV_KS		0x0000000000000800UL /* Supervisor-state prot key */
43#define	SLBV_KP		0x0000000000000400UL /* User-state prot key */
44#define	SLBV_N		0x0000000000000200UL /* No-execute protection */
45#define	SLBV_L		0x0000000000000100UL /* Large page selector */
46#define	SLBV_CLASS	0x0000000000000080UL /* Class selector */
47#define	SLBV_VSID_MASK	0xfffffffffffff000UL /* Virtual segment ID mask */
48#define	SLBV_VSID_SHIFT	12
49
50#define	KERNEL_VSID_BIT	0x0000001000000000UL /* Bit set in all kernel VSIDs */
51
52/*
53 * Shift large-page VSIDs one place left. At present, they are only used in the
54 * kernel direct map, and we already assume in the placement of KVA that the
55 * CPU cannot address more than 63 bits of memory.
56 */
57#define KERNEL_VSID(esid, large) (((uint64_t)(esid) << (large ? 1 : 0)) | KERNEL_VSID_BIT)
58
59#define	SLBE_VALID	0x0000000008000000UL /* SLB entry valid */
60#define	SLBE_INDEX_MASK	0x0000000000000fffUL /* SLB index mask*/
61#define	SLBE_ESID_MASK	0xfffffffff0000000UL /* Effective segment ID mask */
62#define	SLBE_ESID_SHIFT	28
63
64struct slb {
65	uint64_t	slbv;
66	uint64_t	slbe;
67};
68
69#endif /* !_MACHINE_SLB_H_ */
70