1/*-
 2 * SPDX-License-Identifier: BSD-2-Clause
 3 *
 4 * Copyright (C) 2002 Benno Rice.
 5 * All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef _MACHINE_SR_H_
29#define	_MACHINE_SR_H_
30
31/*
32 * Bit definitions for segment registers.
33 *
34 * PowerPC Microprocessor Family: The Programming Environments for 32-bit
35 * Microprocessors, section 2.3.5
36 */
37
38#define	SR_TYPE		0x80000000	/* Type selector */
39#define	SR_KS		0x40000000	/* Supervisor-state protection key */
40#define	SR_KP		0x20000000	/* User-state protection key */
41#define	SR_N		0x10000000	/* No-execute protection */
42#define	SR_VSID_MASK	0x00ffffff	/* Virtual Segment ID mask */
43
44/* Kernel segment register usage */
45#define	USER_SR		12
46#define	KERNEL_SR	13
47#define	KERNEL2_SR	14
48#define	KERNEL3_SR	15
49#define	KERNEL_VSIDBITS	0xfffffUL
50#define	KERNEL_SEGMENT	(0xfffff0 + KERNEL_SR)
51#define	KERNEL2_SEGMENT	(0xfffff0 + KERNEL2_SR)
52#define	EMPTY_SEGMENT	0xfffff0
53#ifdef __powerpc64__
54#define	USER_ADDR	0xc00ffffff0000000UL
55#else
56#define	USER_ADDR	((uintptr_t)USER_SR << ADDR_SR_SHFT)
57#endif
58#define	SEGMENT_LENGTH	0x10000000UL
59#define	SEGMENT_INVMASK	0x0fffffffUL
60#define	SEGMENT_MASK	~SEGMENT_INVMASK
61
62#endif /* !_MACHINE_SR_H_ */