asm.h revision 1.29
1 /* $NetBSD: asm.h,v 1.29 2013/07/16 21:01:03 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 32 /* 33 * Copyright (c) 1994 Allen Briggs 34 * All rights reserved. 35 * 36 * Gleaned from locore.s and sun3 asm.h which had the following copyrights: 37 * locore.s: 38 * Copyright (c) 1988 University of Utah. 39 * Copyright (c) 1982, 1990 The Regents of the University of California. 40 * sun3/include/asm.h: 41 * Copyright (c) 1993 Adam Glass 42 * Copyright (c) 1990 The Regents of the University of California. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 */ 72 73 #ifndef _M68K_ASM_H_ 74 #define _M68K_ASM_H_ 75 76 #if defined(__ELF__) && defined(PIC) 77 #define PIC_PLT(name) name@PLTPC 78 #else 79 #define PIC_PLT(name) name 80 #endif 81 82 #ifdef __ELF__ 83 # if __STDC__ 84 # define _C_LABEL(name) name 85 # else 86 # define _C_LABEL(name) name 87 #endif /* __STDC__ */ 88 #else /* __ELF__ */ 89 # if __STDC__ 90 # define _C_LABEL(name) _ ## name 91 # else 92 # define _C_LABEL(name) _/**/name 93 # endif /* __STDC__ */ 94 #endif /* __ELF__ */ 95 96 #define _ASM_LABEL(name) name 97 98 #define _ENTRY(name) \ 99 .text; .even; .globl name; .type name,@function; name: 100 #define END(name) .size name,.-name 101 102 #ifdef __ELF__ 103 #define MCOUNT_ENTRY __mcount 104 #else 105 #define MCOUNT_ENTRY mcount 106 #endif 107 108 #ifdef GPROF 109 #define _PROF_PROLOG link %a6,#0; jbsr MCOUNT_ENTRY; unlk %a6 110 #else 111 #define _PROF_PROLOG 112 #endif 113 114 #define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG 115 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG 116 117 #define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) 118 #define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name)) 119 120 /* 121 * The m68k ALTENTRY macro is very different than the traditional 122 * implementation used by other NetBSD ports. Usually ALTENTRY 123 * simply provides an alternate function entry point. The m68k 124 * definition takes a second argument and jumps inside the second 125 * function when profiling is enabled. 126 * 127 * The m68k behavior is similar to the ENTRY2 macro found in 128 * solaris' asm_linkage.h. 129 * 130 * Providing ENTRY2 and changing all the code that uses ALTENTRY 131 * to use it would be a desirable change. 132 */ 133 #ifdef PROF 134 #define ALTENTRY(name, rname) ENTRY(name); jra rname+12 135 #else 136 #define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name)) 137 #endif 138 139 #define RCSID(x) .pushsection ".ident" ; \ 140 .asciz x ; \ 141 .popsection 142 143 /* 144 * Global variables of whatever sort. 145 */ 146 #define GLOBAL(x) \ 147 .globl _C_LABEL(x) ; \ 148 _C_LABEL(x): 149 150 #define ASGLOBAL(x) \ 151 .globl _ASM_LABEL(x) ; \ 152 _ASM_LABEL(x): 153 154 /* 155 * ...and local variables. 156 */ 157 #define LOCAL(x) \ 158 _C_LABEL(x): 159 160 #define ASLOCAL(x) \ 161 _ASM_LABEL(x): 162 163 /* 164 * Items in the BSS segment. 165 */ 166 #define BSS(name, size) \ 167 .comm _C_LABEL(name),size 168 169 #define ASBSS(name, size) \ 170 .comm _ASM_LABEL(name),size 171 172 #ifdef _KERNEL 173 /* 174 * Shorthand for calling panic(). 175 * Note the side-effect: it uses up the 9: label, so be careful! 176 */ 177 #define PANIC(x) \ 178 pea 9f ; \ 179 jbsr _C_LABEL(panic) ; \ 180 9: .asciz x ; \ 181 .even 182 183 /* 184 * Need a better place for these but these are common across 185 * all m68k ports so let's define just once. 186 */ 187 #define INTERRUPT_SAVEREG moveml #0xC0C0,%sp@- 188 #define INTERRUPT_RESTOREREG moveml %sp@+,#0x0303 189 190 /* 64-bit counter increments */ 191 #define CPUINFO_INCREMENT(n) \ 192 lea _C_LABEL(cpu_info_store)+(n)+4,%a1; \ 193 addq.l #1,(%a1); \ 194 clr.l %d0; /* doesn't change CCR[X] */ \ 195 move.l -(%a1),%d1; /* doesn't change CCR[X] */ \ 196 addx.l %d0,%d1; \ 197 move.l %d1,(%a1) 198 199 /* 64-bit counter increments */ 200 #define CPUINFO_ADD(n, addend) \ 201 lea _C_LABEL(cpu_info_store)+(n)+4,%a1; \ 202 add.l addend,(%a1); \ 203 clr.l %d0; /* doesn't change CCR[X] */ \ 204 move.l -(%a1),%d1; /* doesn't change CCR[X] */ \ 205 addx.l %d0,%d1; \ 206 move.l %d1,(%a1) 207 208 #endif /* _KERNEL */ 209 210 /* 211 * Shorthand for defining vectors for the vector table. 212 */ 213 #define VECTOR(x) \ 214 .long _C_LABEL(x) 215 216 #define ASVECTOR(x) \ 217 .long _ASM_LABEL(x) 218 219 #define VECTOR_UNUSED \ 220 .long 0 221 222 #ifdef __ELF__ 223 #define WEAK_ALIAS(alias,sym) \ 224 .weak alias; \ 225 alias = sym 226 #endif 227 /* 228 * STRONG_ALIAS: create a strong alias. 229 */ 230 #define STRONG_ALIAS(alias,sym) \ 231 .globl alias; \ 232 alias = sym 233 234 #ifdef __STDC__ 235 #define WARN_REFERENCES(sym,msg) \ 236 .pushsection .gnu.warning. ## sym; \ 237 .ascii msg; \ 238 .popsection 239 #else 240 #define WARN_REFERENCES(sym,msg) \ 241 .pushsection .gnu.warning./**/sym; \ 242 .ascii msg; \ 243 .popsection 244 #endif /* __STDC__ */ 245 246 /* 247 * Macros to hide shortcomings in the 68010. 248 */ 249 #ifdef __mc68010__ 250 #define EXTBL(reg) \ 251 extw reg ; \ 252 extl reg 253 #else /* __mc68010__ */ 254 #define EXTBL(reg) \ 255 extbl reg 256 #endif /* __mc68010__ */ 257 258 #endif /* _M68K_ASM_H_ */ 259
Indexes created Thu Oct 02 14:10:14 GMT 2025