1/* $NetBSD: mcontext.h,v 1.26 2024/11/30 01:04:13 christos Exp $ */
2
3/*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Klaus Klein.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _POWERPC_MCONTEXT_H_
33#define _POWERPC_MCONTEXT_H_
34
35/*
36 * Layout of mcontext_t based on the System V Application Binary Interface,
37 * Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and
38 * extended for the AltiVec Register File. Note that due to the increased
39 * alignment requirements of the latter, the offset of mcontext_t within
40 * an ucontext_t is different from System V.
41 */
42
43#define _NGREG 39 /* GR0-31, CR, LR, SRR0, SRR1, CTR, XER, MQ */
44
45typedef long __greg_t;
46typedef __greg_t __gregset_t[_NGREG];
47
48#define _REG_R0 0
49#define _REG_R1 1
50#define _REG_R2 2
51#define _REG_R3 3
52#define _REG_R4 4
53#define _REG_R5 5
54#define _REG_R6 6
55#define _REG_R7 7
56#define _REG_R8 8
57#define _REG_R9 9
58#define _REG_R10 10
59#define _REG_R11 11
60#define _REG_R12 12
61#define _REG_R13 13
62#define _REG_R14 14
63#define _REG_R15 15
64#define _REG_R16 16
65#define _REG_R17 17
66#define _REG_R18 18
67#define _REG_R19 19
68#define _REG_R20 20
69#define _REG_R21 21
70#define _REG_R22 22
71#define _REG_R23 23
72#define _REG_R24 24
73#define _REG_R25 25
74#define _REG_R26 26
75#define _REG_R27 27
76#define _REG_R28 28
77#define _REG_R29 29
78#define _REG_R30 30
79#define _REG_R31 31
80#define _REG_CR 32 /* Condition Register */
81#define _REG_LR 33 /* Link Register */
82#define _REG_PC 34 /* PC (copy of SRR0) */
83#define _REG_MSR 35 /* MSR (copy of SRR1) */
84#define _REG_CTR 36 /* Count Register */
85#define _REG_XER 37 /* Integer Exception Register */
86#define _REG_MQ 38 /* MQ Register (POWER only) */
87
88typedef struct {
89#ifdef _KERNEL
90 unsigned long long __fpu_regs[32]; /* FP0-31 */
91#else
92 double __fpu_regs[32]; /* FP0-31 */
93#endif
94 unsigned int __fpu_fpscr; /* FP Status and Control Register */
95 unsigned int __fpu_valid; /* Set together with _UC_FPU */
96} __fpregset_t;
97
98#define _NVR 32 /* Number of Vector registers */
99
100typedef struct {
101 union __vr {
102 unsigned char __vr8[16];
103 unsigned short __vr16[8];
104 unsigned int __vr32[4];
105 unsigned char __spe8[8];
106 unsigned short __spe16[4];
107 unsigned int __spe32[2];
108 } __vrs[_NVR] __aligned(16);
109 unsigned int __vscr; /* VSCR */
110 unsigned int __vrsave; /* VRSAVE */
111} __vrf_t;
112
113typedef struct {
114 __gregset_t __gregs; /* General Purpose Register set */
115 __fpregset_t __fpregs; /* Floating Point Register set */
116 __vrf_t __vrf; /* Vector Register File */
117} mcontext_t;
118
119#if defined(_LP64)
120typedef int __greg32_t;
121typedef __greg32_t __gregset32_t[_NGREG];
122
123typedef struct {
124 __gregset32_t __gregs; /* General Purpose Register set */
125 __fpregset_t __fpregs; /* Floating Point Register set */
126 __vrf_t __vrf; /* Vector Register File */
127} mcontext32_t;
128#endif
129
130/* Machine-dependent uc_flags */
131#define _UC_POWERPC_VEC _UC_MD_BIT16 /* Vector Register File valid */
132#define _UC_POWERPC_SPE _UC_MD_BIT17 /* Vector Register File valid */
133#define _UC_TLSBASE _UC_MD_BIT19 /* thread context valid in R2 */
134#define _UC_SETSTACK _UC_MD_BIT20
135#define _UC_CLRSTACK _UC_MD_BIT21
136
137#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_R1])
138#define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_R31])
139#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
140#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_R3])
141
142#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
143
144#endif /* !_POWERPC_MCONTEXT_H_ */