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_ */