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 #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_ */ 196