2 * Copyright (C) 2002 Benno Rice.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``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,
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23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef _MACHINE_SR_H_
29 #define _MACHINE_SR_H_
32 * Bit definitions for segment registers.
34 * PowerPC Microprocessor Family: The Programming Environments for 32-bit
35 * Microprocessors, section 2.3.5
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 */
44 /* Kernel segment register usage */
48 #define KERNEL_VSIDBITS 0xfffff
49 #define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR)
50 #define KERNEL2_SEGMENT (0xfffff0 + KERNEL2_SR)
51 #define EMPTY_SEGMENT 0xfffff0
52 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT))
53 #define SEGMENT_LENGTH 0x10000000
54 #define SEGMENT_MASK 0xf0000000
56 #endif /* !_MACHINE_SR_H_ */