1 /* $NetBSD: mcontext.h,v 1.2 2018/02/15 15:53:56 kamil Exp $ */
2
3 /*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
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 #ifndef _OR1K_MCONTEXT_H_
32 #define _OR1K_MCONTEXT_H_
33
34 /*
35 */
36
37 #define _NGREG 33 /* GR1-31, FPCSR */
38
39 typedef __int64_t __greg_t;
40 typedef __greg_t __gregset_t[_NGREG];
41
42 #define _REG_R1 0
43 #define _REG_R2 1
44 #define _REG_R3 2
45 #define _REG_R4 3
46 #define _REG_R5 4
47 #define _REG_R6 5
48 #define _REG_R7 6
49 #define _REG_R8 7
50 #define _REG_R9 8
51 #define _REG_R10 9
52 #define _REG_R11 10
53 #define _REG_R12 11
54 #define _REG_R13 12
55 #define _REG_R14 13
56 #define _REG_R15 14
57 #define _REG_R16 15
58 #define _REG_R17 16
59 #define _REG_R18 17
60 #define _REG_R19 18
61 #define _REG_R20 19
62 #define _REG_R21 20
63 #define _REG_R22 21
64 #define _REG_R23 22
65 #define _REG_R24 23
66 #define _REG_R25 24
67 #define _REG_R26 25
68 #define _REG_R27 26
69 #define _REG_R28 27
70 #define _REG_R29 28
71 #define _REG_R30 29
72 #define _REG_R31 30
73 #define _REG_PC 31
74 #define _REG_FPCSR 32
75
76 #define _REG_SP _REG_R1
77 #define _REG_LR _REG_R9
78 #define _REG_TP _REG_R10
79 #define _REG_RV _REG_R11
80 #define _REG_GP _REG_R16
81
82 typedef struct {
83 __gregset_t __gregs; /* General Purpose Register set */
84 __greg_t __spare[8]; /* future proof */
85 } mcontext_t;
86
87 /* Machine-dependent uc_flags */
88 #define _UC_TLSBASE 0x00080000 /* see <sys/ucontext.h> */
89
90 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP])
91 #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_R2])
92 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
93 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_RV])
94
95 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
96
97 #if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || defined(__LIBPTHREAD_SOURCE__)
98 #include <sys/tls.h>
99
100 /*
101 * On OpenRISC 1000, since displacements are signed 16-bit values, the TCB
102 * Pointer is biased by 0x7000 + sizeof(tcb) so that first thread datum can be
103 * addressed by -28672 thereby leaving 60KB available for use as thread data.
104 */
105 #define TLS_TP_OFFSET 0x7000
106 #define TLS_DTV_OFFSET 0x8000
107 __CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000);
108
109 static __inline void *
__lwp_getprivate_fast(void)110 __lwp_getprivate_fast(void)
111 {
112 void *__tp;
113 __asm("l.ori %0,r10,0" : "=r"(__tp));
114 return __tp;
115 }
116
117 static __inline void *
__lwp_gettcb_fast(void)118 __lwp_gettcb_fast(void)
119 {
120 void *__tcb;
121
122 __asm __volatile(
123 "l.addi %[__tcb],r10,%[__offset]"
124 : [__tcb] "=r" (__tcb)
125 : [__offset] "n" (-(TLS_TP_OFFSET + sizeof(struct tls_tcb))));
126
127 return __tcb;
128 }
129
130 static __inline void
__lwp_settcb(void * __tcb)131 __lwp_settcb(void *__tcb)
132 {
133 __asm __volatile(
134 "l.addi r10,%[__tcb],%[__offset]"
135 :
136 : [__tcb] "r" (__tcb),
137 [__offset] "n" (TLS_TP_OFFSET + sizeof(struct tls_tcb)));
138 }
139 #endif /* _RTLD_SOURCE || _LIBC_SOURCE || __LIBPTHREAD_SOURCE__ */
140
141 #endif /* !_OR1K_MCONTEXT_H_ */
142