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 * $FreeBSD$ 37 */ 38 39 #ifndef _MACHINE_ASM_H_ 40 #define _MACHINE_ASM_H_ 41 #include <sys/cdefs.h> 42 43 #ifdef __ELF__ 44 # define _C_LABEL(x) x 45 #else 46 # ifdef __STDC__ 47 # define _C_LABEL(x) _ ## x 48 # else 49 # define _C_LABEL(x) _/**/x 50 # endif 51 #endif 52 #define _ASM_LABEL(x) x 53 54 #ifndef _JB_MAGIC__SETJMP 55 #define _JB_MAGIC__SETJMP 0x4278f500 56 #define _JB_MAGIC_SETJMP 0x4278f501 57 #endif 58 59 #define I32_bit (1 << 7) /* IRQ disable */ 60 #define F32_bit (1 << 6) /* FIQ disable */ 61 62 #define CPU_CONTROL_32BP_ENABLE 0x00000010 /* P: 32-bit exception handlers */ 63 #define CPU_CONTROL_32BD_ENABLE 0x00000020 /* D: 32-bit addressing */ 64 65 #ifndef _ALIGN_TEXT 66 # define _ALIGN_TEXT .align 0 67 #endif 68 69 #ifdef __ARM_EABI__ 70 #define STOP_UNWINDING .cantunwind 71 #define _FNSTART .fnstart 72 #define _FNEND .fnend 73 #else 74 #define STOP_UNWINDING 75 #define _FNSTART 76 #define _FNEND 77 #endif 78 79 /* 80 * gas/arm uses @ as a single comment character and thus cannot be used here 81 * Instead it recognised the # instead of an @ symbols in .type directives 82 * We define a couple of macros so that assembly code will not be dependant 83 * on one or the other. 84 */ 85 #define _ASM_TYPE_FUNCTION #function 86 #define _ASM_TYPE_OBJECT #object 87 #define GLOBAL(X) .globl x 88 #define _ENTRY(x) \ 89 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: _FNSTART 90 91 #define END(x) .size x, . - x; _FNEND 92 93 #ifdef GPROF 94 # define _PROF_PROLOGUE \ 95 mov ip, lr; bl __mcount 96 #else 97 # define _PROF_PROLOGUE 98 #endif 99 100 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 101 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 102 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 103 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 104 105 #define ASMSTR .asciz 106 107 #if defined(__ELF__) && defined(PIC) 108 #ifdef __STDC__ 109 #define PIC_SYM(x,y) x ## ( ## y ## ) 110 #else 111 #define PIC_SYM(x,y) x/**/(/**/y/**/) 112 #endif 113 #else 114 #define PIC_SYM(x,y) x 115 #endif 116 117 #undef __FBSDID 118 #if !defined(lint) && !defined(STRIP_FBSDID) 119 #define __FBSDID(s) .ident s 120 #else 121 #define __FBSDID(s) /* nothing */ 122 #endif 123 124 125 #ifdef __ELF__ 126 #define WEAK_ALIAS(alias,sym) \ 127 .weak alias; \ 128 alias = sym 129 #endif 130 131 #ifdef __STDC__ 132 #define WARN_REFERENCES(sym,msg) \ 133 .stabs msg ## ,30,0,0,0 ; \ 134 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0 135 #elif defined(__ELF__) 136 #define WARN_REFERENCES(sym,msg) \ 137 .stabs msg,30,0,0,0 ; \ 138 .stabs __STRING(sym),1,0,0,0 139 #else 140 #define WARN_REFERENCES(sym,msg) \ 141 .stabs msg,30,0,0,0 ; \ 142 .stabs __STRING(_/**/sym),1,0,0,0 143 #endif /* __STDC__ */ 144 145 /* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */ 146 /* The _ARM_ARCH_* macros are deprecated and will be removed soon. */ 147 /* This should be moved into another header so it can be used in 148 * both asm and C code. machine/asm.h cannot be included in C code. */ 149 #if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__) 150 #define _ARM_ARCH_7 151 #define _HAVE_ARMv7_INSTRUCTIONS 1 152 #endif 153 154 #if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \ 155 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \ 156 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__) 157 #define _ARM_ARCH_6 158 #define _HAVE_ARMv6_INSTRUCTIONS 1 159 #endif 160 161 #if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \ 162 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__) 163 #define _ARM_ARCH_5E 164 #define _HAVE_ARMv5E_INSTRUCTIONS 1 165 #endif 166 167 #if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \ 168 defined (__ARM_ARCH_5T__) 169 #define _ARM_ARCH_5 170 #define _HAVE_ARMv5_INSTRUCTIONS 1 171 #endif 172 173 #if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__) 174 #define _ARM_ARCH_4T 175 #define _HAVE_ARMv4T_INSTRUCTIONS 1 176 #endif 177 178 /* FreeBSD requires ARMv4, so this is always set. */ 179 #define _HAVE_ARMv4_INSTRUCTIONS 1 180 181 #if defined (_HAVE_ARMv4T_INSTRUCTIONS) 182 # define RET bx lr 183 # define RETeq bxeq lr 184 # define RETne bxne lr 185 # define RETc(c) bx##c lr 186 #else 187 # define RET mov pc, lr 188 # define RETeq moveq pc, lr 189 # define RETne movne pc, lr 190 # define RETc(c) mov##c pc, lr 191 #endif 192 193 #endif /* !_MACHINE_ASM_H_ */ 194