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asm.h (290648) asm.h (300050)
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 *
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: head/sys/arm/include/asm.h 290648 2015-11-10 12:02:41Z mmel $
36 * $FreeBSD: head/sys/arm/include/asm.h 300050 2016-05-17 12:52:31Z eadler $
37 */
38
39#ifndef _MACHINE_ASM_H_
40#define _MACHINE_ASM_H_
41#include <sys/cdefs.h>
42#include <machine/acle-compat.h>
43#include <machine/sysreg.h>
44
45#define _C_LABEL(x) x
46#define _ASM_LABEL(x) x
47
48#ifndef _ALIGN_TEXT
49# define _ALIGN_TEXT .align 2
50#endif
51
52#ifndef _STANDALONE
53#define STOP_UNWINDING .cantunwind
54#define _FNSTART .fnstart
55#define _FNEND .fnend
56#define _SAVE(...) .save __VA_ARGS__
57#else
58#define STOP_UNWINDING
59#define _FNSTART
60#define _FNEND
61#define _SAVE(...)
62#endif
63
64/*
65 * gas/arm uses @ as a single comment character and thus cannot be used here.
66 * It recognises the # instead of an @ symbol in .type directives.
67 */
68#define _ASM_TYPE_FUNCTION #function
69#define _ASM_TYPE_OBJECT #object
70
71/* XXX Is this still the right prologue for profiling? */
72#ifdef GPROF
73#define _PROF_PROLOGUE \
74 mov ip, lr; \
75 bl __mcount
76#else
77#define _PROF_PROLOGUE
78#endif
79
80/*
81 * EENTRY()/EEND() mark "extra" entry/exit points from a function.
37 */
38
39#ifndef _MACHINE_ASM_H_
40#define _MACHINE_ASM_H_
41#include <sys/cdefs.h>
42#include <machine/acle-compat.h>
43#include <machine/sysreg.h>
44
45#define _C_LABEL(x) x
46#define _ASM_LABEL(x) x
47
48#ifndef _ALIGN_TEXT
49# define _ALIGN_TEXT .align 2
50#endif
51
52#ifndef _STANDALONE
53#define STOP_UNWINDING .cantunwind
54#define _FNSTART .fnstart
55#define _FNEND .fnend
56#define _SAVE(...) .save __VA_ARGS__
57#else
58#define STOP_UNWINDING
59#define _FNSTART
60#define _FNEND
61#define _SAVE(...)
62#endif
63
64/*
65 * gas/arm uses @ as a single comment character and thus cannot be used here.
66 * It recognises the # instead of an @ symbol in .type directives.
67 */
68#define _ASM_TYPE_FUNCTION #function
69#define _ASM_TYPE_OBJECT #object
70
71/* XXX Is this still the right prologue for profiling? */
72#ifdef GPROF
73#define _PROF_PROLOGUE \
74 mov ip, lr; \
75 bl __mcount
76#else
77#define _PROF_PROLOGUE
78#endif
79
80/*
81 * EENTRY()/EEND() mark "extra" entry/exit points from a function.
82 * LEENTRY()/LEEND() are the the same for local symbols.
82 * LEENTRY()/LEEND() are the same for local symbols.
83 * The unwind info cannot handle the concept of a nested function, or a function
84 * with multiple .fnstart directives, but some of our assembler code is written
85 * with multiple labels to allow entry at several points. The EENTRY() macro
86 * defines such an extra entry point without a new .fnstart, so that it's
87 * basically just a label that you can jump to. The EEND() macro does nothing
88 * at all, except document the exit point associated with the same-named entry.
89 */
90#define GLOBAL(x) .global x
91
92#ifdef __thumb__
93#define _FUNC_MODE .code 16; .thumb_func
94#else
95#define _FUNC_MODE .code 32
96#endif
97
98#define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; _FUNC_MODE; x:
99#define _LEEND(x) /* nothing */
100#define _EENTRY(x) GLOBAL(x); _LEENTRY(x)
101#define _EEND(x) _LEEND(x)
102
103#define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART
104#define _LEND(x) .size x, . - x; _FNEND
105#define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART
106#define _END(x) _LEND(x)
107
108#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
109#define EENTRY(y) _EENTRY(_C_LABEL(y));
110#define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
111#define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
112#define END(y) _END(_C_LABEL(y))
113#define EEND(y) _EEND(_C_LABEL(y))
114#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
115#define ASLENTRY(y) _LENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
116#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y));
117#define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y));
118#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
119#define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y))
120#define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
121#define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y))
122#define ASEND(y) _END(_ASM_LABEL(y))
123#define ASLEND(y) _LEND(_ASM_LABEL(y))
124#define ASEEND(y) _EEND(_ASM_LABEL(y))
125#define ASLEEND(y) _LEEND(_ASM_LABEL(y))
126
127#define ASMSTR .asciz
128
129#if defined(PIC)
130#define PLT_SYM(x) PIC_SYM(x, PLT)
131#define GOT_SYM(x) PIC_SYM(x, GOT)
132#define GOT_GET(x,got,sym) \
133 ldr x, sym; \
134 ldr x, [x, got]
135#define GOT_INIT(got,gotsym,pclabel) \
136 ldr got, gotsym; \
137 pclabel: add got, pc
138#ifdef __thumb__
139#define GOT_INITSYM(gotsym,pclabel) \
140 .align 2; \
141 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
142#else
143#define GOT_INITSYM(gotsym,pclabel) \
144 .align 2; \
145 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
146#endif
147
148#ifdef __STDC__
149#define PIC_SYM(x,y) x ## ( ## y ## )
150#else
151#define PIC_SYM(x,y) x/**/(/**/y/**/)
152#endif
153
154#else
155#define PLT_SYM(x) x
156#define GOT_SYM(x) x
157#define GOT_GET(x,got,sym) \
158 ldr x, sym;
159#define GOT_INIT(got,gotsym,pclabel)
160#define GOT_INITSYM(gotsym,pclabel)
161#define PIC_SYM(x,y) x
162#endif /* PIC */
163
164#undef __FBSDID
165#if !defined(lint) && !defined(STRIP_FBSDID)
166#define __FBSDID(s) .ident s
167#else
168#define __FBSDID(s) /* nothing */
169#endif
170
171
172#define WEAK_ALIAS(alias,sym) \
173 .weak alias; \
174 alias = sym
175
176#ifdef __STDC__
177#define WARN_REFERENCES(sym,msg) \
178 .stabs msg ## ,30,0,0,0 ; \
179 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
180#else
181#define WARN_REFERENCES(sym,msg) \
182 .stabs msg,30,0,0,0 ; \
183 .stabs __STRING(sym),1,0,0,0
184#endif /* __STDC__ */
185
186/* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
187/* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
188/* This should be moved into another header so it can be used in
189 * both asm and C code. machine/asm.h cannot be included in C code. */
190#if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
191#define _ARM_ARCH_7
192#define _HAVE_ARMv7_INSTRUCTIONS 1
193#endif
194
195#if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
196 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
197 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
198#define _ARM_ARCH_6
199#define _HAVE_ARMv6_INSTRUCTIONS 1
200#endif
201
202#if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
203 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
204#define _ARM_ARCH_5E
205#define _HAVE_ARMv5E_INSTRUCTIONS 1
206#endif
207
208#if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
209 defined (__ARM_ARCH_5T__)
210#define _ARM_ARCH_5
211#define _HAVE_ARMv5_INSTRUCTIONS 1
212#endif
213
214#if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
215#define _ARM_ARCH_4T
216#define _HAVE_ARMv4T_INSTRUCTIONS 1
217#endif
218
219/* FreeBSD requires ARMv4, so this is always set. */
220#define _HAVE_ARMv4_INSTRUCTIONS 1
221
222#if defined (_HAVE_ARMv4T_INSTRUCTIONS)
223# define RET bx lr
224# define RETeq bxeq lr
225# define RETne bxne lr
226# define RETc(c) bx##c lr
227#else
228# define RET mov pc, lr
229# define RETeq moveq pc, lr
230# define RETne movne pc, lr
231# define RETc(c) mov##c pc, lr
232#endif
233
234#if __ARM_ARCH >= 7
235#define ISB isb
236#define DSB dsb
237#define DMB dmb
238#define WFI wfi
239#elif __ARM_ARCH == 6
240#define ISB mcr CP15_CP15ISB
241#define DSB mcr CP15_CP15DSB
242#define DMB mcr CP15_CP15DMB
243#define WFI mcr CP15_CP15WFI
244#else
245#define ISB mcr CP15_CP15ISB
246#define DSB mcr CP15_CP15DSB /* DSB and DMB are the */
247#define DMB mcr CP15_CP15DSB /* same prior to v6.*/
248/* No form of WFI available on v4, define nothing to get an error on use. */
249#endif
250
251#endif /* !_MACHINE_ASM_H_ */
83 * The unwind info cannot handle the concept of a nested function, or a function
84 * with multiple .fnstart directives, but some of our assembler code is written
85 * with multiple labels to allow entry at several points. The EENTRY() macro
86 * defines such an extra entry point without a new .fnstart, so that it's
87 * basically just a label that you can jump to. The EEND() macro does nothing
88 * at all, except document the exit point associated with the same-named entry.
89 */
90#define GLOBAL(x) .global x
91
92#ifdef __thumb__
93#define _FUNC_MODE .code 16; .thumb_func
94#else
95#define _FUNC_MODE .code 32
96#endif
97
98#define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; _FUNC_MODE; x:
99#define _LEEND(x) /* nothing */
100#define _EENTRY(x) GLOBAL(x); _LEENTRY(x)
101#define _EEND(x) _LEEND(x)
102
103#define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART
104#define _LEND(x) .size x, . - x; _FNEND
105#define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART
106#define _END(x) _LEND(x)
107
108#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
109#define EENTRY(y) _EENTRY(_C_LABEL(y));
110#define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
111#define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
112#define END(y) _END(_C_LABEL(y))
113#define EEND(y) _EEND(_C_LABEL(y))
114#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
115#define ASLENTRY(y) _LENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
116#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y));
117#define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y));
118#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
119#define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y))
120#define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
121#define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y))
122#define ASEND(y) _END(_ASM_LABEL(y))
123#define ASLEND(y) _LEND(_ASM_LABEL(y))
124#define ASEEND(y) _EEND(_ASM_LABEL(y))
125#define ASLEEND(y) _LEEND(_ASM_LABEL(y))
126
127#define ASMSTR .asciz
128
129#if defined(PIC)
130#define PLT_SYM(x) PIC_SYM(x, PLT)
131#define GOT_SYM(x) PIC_SYM(x, GOT)
132#define GOT_GET(x,got,sym) \
133 ldr x, sym; \
134 ldr x, [x, got]
135#define GOT_INIT(got,gotsym,pclabel) \
136 ldr got, gotsym; \
137 pclabel: add got, pc
138#ifdef __thumb__
139#define GOT_INITSYM(gotsym,pclabel) \
140 .align 2; \
141 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
142#else
143#define GOT_INITSYM(gotsym,pclabel) \
144 .align 2; \
145 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
146#endif
147
148#ifdef __STDC__
149#define PIC_SYM(x,y) x ## ( ## y ## )
150#else
151#define PIC_SYM(x,y) x/**/(/**/y/**/)
152#endif
153
154#else
155#define PLT_SYM(x) x
156#define GOT_SYM(x) x
157#define GOT_GET(x,got,sym) \
158 ldr x, sym;
159#define GOT_INIT(got,gotsym,pclabel)
160#define GOT_INITSYM(gotsym,pclabel)
161#define PIC_SYM(x,y) x
162#endif /* PIC */
163
164#undef __FBSDID
165#if !defined(lint) && !defined(STRIP_FBSDID)
166#define __FBSDID(s) .ident s
167#else
168#define __FBSDID(s) /* nothing */
169#endif
170
171
172#define WEAK_ALIAS(alias,sym) \
173 .weak alias; \
174 alias = sym
175
176#ifdef __STDC__
177#define WARN_REFERENCES(sym,msg) \
178 .stabs msg ## ,30,0,0,0 ; \
179 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
180#else
181#define WARN_REFERENCES(sym,msg) \
182 .stabs msg,30,0,0,0 ; \
183 .stabs __STRING(sym),1,0,0,0
184#endif /* __STDC__ */
185
186/* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
187/* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
188/* This should be moved into another header so it can be used in
189 * both asm and C code. machine/asm.h cannot be included in C code. */
190#if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
191#define _ARM_ARCH_7
192#define _HAVE_ARMv7_INSTRUCTIONS 1
193#endif
194
195#if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
196 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
197 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
198#define _ARM_ARCH_6
199#define _HAVE_ARMv6_INSTRUCTIONS 1
200#endif
201
202#if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
203 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
204#define _ARM_ARCH_5E
205#define _HAVE_ARMv5E_INSTRUCTIONS 1
206#endif
207
208#if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
209 defined (__ARM_ARCH_5T__)
210#define _ARM_ARCH_5
211#define _HAVE_ARMv5_INSTRUCTIONS 1
212#endif
213
214#if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
215#define _ARM_ARCH_4T
216#define _HAVE_ARMv4T_INSTRUCTIONS 1
217#endif
218
219/* FreeBSD requires ARMv4, so this is always set. */
220#define _HAVE_ARMv4_INSTRUCTIONS 1
221
222#if defined (_HAVE_ARMv4T_INSTRUCTIONS)
223# define RET bx lr
224# define RETeq bxeq lr
225# define RETne bxne lr
226# define RETc(c) bx##c lr
227#else
228# define RET mov pc, lr
229# define RETeq moveq pc, lr
230# define RETne movne pc, lr
231# define RETc(c) mov##c pc, lr
232#endif
233
234#if __ARM_ARCH >= 7
235#define ISB isb
236#define DSB dsb
237#define DMB dmb
238#define WFI wfi
239#elif __ARM_ARCH == 6
240#define ISB mcr CP15_CP15ISB
241#define DSB mcr CP15_CP15DSB
242#define DMB mcr CP15_CP15DMB
243#define WFI mcr CP15_CP15WFI
244#else
245#define ISB mcr CP15_CP15ISB
246#define DSB mcr CP15_CP15DSB /* DSB and DMB are the */
247#define DMB mcr CP15_CP15DSB /* same prior to v6.*/
248/* No form of WFI available on v4, define nothing to get an error on use. */
249#endif
250
251#endif /* !_MACHINE_ASM_H_ */