FreeBSD/Linux Kernel Cross Reference
sys/arm/include/asm.h
1 /* $NetBSD: asm.h,v 1.5 2003/08/07 16:26:53 agc Exp $ */
2
3 /*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
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 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)asm.h 5.5 (Berkeley) 5/7/91
35 *
36 * $FreeBSD: releng/10.0/sys/arm/include/asm.h 251510 2013-06-07 21:23:11Z andrew $
37 */
38
39 #ifndef _MACHINE_ASM_H_
40 #define _MACHINE_ASM_H_
41 #include <sys/cdefs.h>
42
43 #define _C_LABEL(x) x
44 #define _ASM_LABEL(x) x
45
46 #define I32_bit (1 << 7) /* IRQ disable */
47 #define F32_bit (1 << 6) /* FIQ disable */
48
49 #define CPU_CONTROL_32BP_ENABLE 0x00000010 /* P: 32-bit exception handlers */
50 #define CPU_CONTROL_32BD_ENABLE 0x00000020 /* D: 32-bit addressing */
51
52 #ifndef _ALIGN_TEXT
53 # define _ALIGN_TEXT .align 0
54 #endif
55
56 #ifdef __ARM_EABI__
57 #define STOP_UNWINDING .cantunwind
58 #define _FNSTART .fnstart
59 #define _FNEND .fnend
60 #else
61 #define STOP_UNWINDING
62 #define _FNSTART
63 #define _FNEND
64 #endif
65
66 /*
67 * gas/arm uses @ as a single comment character and thus cannot be used here
68 * Instead it recognised the # instead of an @ symbols in .type directives
69 * We define a couple of macros so that assembly code will not be dependent
70 * on one or the other.
71 */
72 #define _ASM_TYPE_FUNCTION #function
73 #define _ASM_TYPE_OBJECT #object
74 #define GLOBAL(X) .globl x
75 #define _ENTRY(x) \
76 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: _FNSTART
77
78 #define _END(x) .size x, . - x; _FNEND
79
80 #ifdef GPROF
81 # define _PROF_PROLOGUE \
82 mov ip, lr; bl __mcount
83 #else
84 # define _PROF_PROLOGUE
85 #endif
86
87 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
88 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
89 #define END(y) _END(_C_LABEL(y))
90 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
91 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
92 #define ASEND(y) _END(_ASM_LABEL(y))
93
94 #define ASMSTR .asciz
95
96 #if defined(PIC)
97 #define PLT_SYM(x) PIC_SYM(x, PLT)
98 #define GOT_SYM(x) PIC_SYM(x, GOT)
99 #define GOT_GET(x,got,sym) \
100 ldr x, sym; \
101 ldr x, [x, got]
102 #define GOT_INIT(got,gotsym,pclabel) \
103 ldr got, gotsym; \
104 add got, got, pc; \
105 pclabel:
106 #define GOT_INITSYM(gotsym,pclabel) \
107 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4))
108
109 #ifdef __STDC__
110 #define PIC_SYM(x,y) x ## ( ## y ## )
111 #else
112 #define PIC_SYM(x,y) x/**/(/**/y/**/)
113 #endif
114
115 #else
116 #define PLT_SYM(x) x
117 #define GOT_SYM(x) x
118 #define GOT_GET(x,got,sym) \
119 ldr x, sym;
120 #define GOT_INIT(got,gotsym,pclabel)
121 #define GOT_INITSYM(gotsym,pclabel)
122 #define PIC_SYM(x,y) x
123 #endif /* PIC */
124
125 #undef __FBSDID
126 #if !defined(lint) && !defined(STRIP_FBSDID)
127 #define __FBSDID(s) .ident s
128 #else
129 #define __FBSDID(s) /* nothing */
130 #endif
131
132
133 #define WEAK_ALIAS(alias,sym) \
134 .weak alias; \
135 alias = sym
136
137 #ifdef __STDC__
138 #define WARN_REFERENCES(sym,msg) \
139 .stabs msg ## ,30,0,0,0 ; \
140 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
141 #else
142 #define WARN_REFERENCES(sym,msg) \
143 .stabs msg,30,0,0,0 ; \
144 .stabs __STRING(sym),1,0,0,0
145 #endif /* __STDC__ */
146
147 /* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
148 /* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
149 /* This should be moved into another header so it can be used in
150 * both asm and C code. machine/asm.h cannot be included in C code. */
151 #if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
152 #define _ARM_ARCH_7
153 #define _HAVE_ARMv7_INSTRUCTIONS 1
154 #endif
155
156 #if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
157 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
158 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
159 #define _ARM_ARCH_6
160 #define _HAVE_ARMv6_INSTRUCTIONS 1
161 #endif
162
163 #if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
164 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
165 #define _ARM_ARCH_5E
166 #define _HAVE_ARMv5E_INSTRUCTIONS 1
167 #endif
168
169 #if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
170 defined (__ARM_ARCH_5T__)
171 #define _ARM_ARCH_5
172 #define _HAVE_ARMv5_INSTRUCTIONS 1
173 #endif
174
175 #if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
176 #define _ARM_ARCH_4T
177 #define _HAVE_ARMv4T_INSTRUCTIONS 1
178 #endif
179
180 /* FreeBSD requires ARMv4, so this is always set. */
181 #define _HAVE_ARMv4_INSTRUCTIONS 1
182
183 #if defined (_HAVE_ARMv4T_INSTRUCTIONS)
184 # define RET bx lr
185 # define RETeq bxeq lr
186 # define RETne bxne lr
187 # define RETc(c) bx##c lr
188 #else
189 # define RET mov pc, lr
190 # define RETeq moveq pc, lr
191 # define RETne movne pc, lr
192 # define RETc(c) mov##c pc, lr
193 #endif
194
195 #endif /* !_MACHINE_ASM_H_ */
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