1 /* $NetBSD: asm.h,v 1.37 2025/01/06 10:46:44 martin 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 #define __IMMEDIATE # 77 78 #ifdef __PIC__ 79 #define PIC_PLT(name) name@PLTPC 80 #ifdef __mcoldfire__ 81 #define LEA_LCL(name,reg) \ 82 movl __IMMEDIATE name - .,reg ; \ 83 lea (-6,%pc,reg),reg 84 #define GOT_SETUP(reg) \ 85 movl __IMMEDIATE _GLOBAL_OFFSET_TABLE_@GOTPC,reg ; \ 86 lea (-6,%pc,reg),reg 87 #else 88 #define LEA_LCL(name,reg) lea (name,%pc),reg 89 #define GOT_SETUP(reg) lea (_GLOBAL_OFFSET_TABLE_@GOTPC,%pc),reg 90 #endif 91 #else 92 #define PIC_PLT(name) name 93 #define LEA_LCL(name,reg) movl __IMMEDIATE name,reg 94 #define GOT_SETUP(reg) /* nothing */ 95 #endif 96 97 #if __STDC__ 98 # define _C_LABEL(name) name 99 #else 100 # define _C_LABEL(name) name 101 #endif /* __STDC__ */ 102 103 #define _ASM_LABEL(name) name 104 105 #define _ENTRY(name) \ 106 .text; .even; .globl name; .type name,@function; name: 107 #define END(name) .size name,.-name 108 109 #define MCOUNT_ENTRY __mcount 110 111 #ifdef GPROF 112 #define _PROF_PROLOG link %a6,#0; jbsr MCOUNT_ENTRY; unlk %a6 113 #else 114 #define _PROF_PROLOG 115 #endif 116 117 #define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG 118 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG 119 120 #define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) 121 #define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name)) 122 123 /* 124 * The m68k ALTENTRY macro is very different than the traditional 125 * implementation used by other NetBSD ports. Usually ALTENTRY 126 * simply provides an alternate function entry point. The m68k 127 * definition takes a second argument and jumps inside the second 128 * function when profiling is enabled. 129 * 130 * The m68k behavior is similar to the ENTRY2 macro found in 131 * solaris' asm_linkage.h. 132 * 133 * Providing ENTRY2 and changing all the code that uses ALTENTRY 134 * to use it would be a desirable change. 135 */ 136 #ifdef PROF 137 #define ALTENTRY(name, rname) ENTRY(name); jra rname+12 138 #else 139 #define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name)) 140 #endif 141 142 #ifdef _NETBSD_REVISIONID 143 #define RCSID(x) .pushsection ".ident","MS",@progbits,1; \ 144 .asciz x; \ 145 .ascii "$"; .ascii "NetBSD: "; .ascii __FILE__; \ 146 .ascii " "; .ascii _NETBSD_REVISIONID; \ 147 .asciz " $"; \ 148 .popsection 149 #else 150 #define RCSID(x) .pushsection ".ident","MS",@progbits,1; \ 151 .asciz x; \ 152 .popsection 153 #endif 154 155 /* 156 * Global variables of whatever sort. 157 */ 158 #define GLOBAL(x) \ 159 .globl _C_LABEL(x) ; \ 160 _C_LABEL(x): 161 162 #define ASGLOBAL(x) \ 163 .globl _ASM_LABEL(x) ; \ 164 _ASM_LABEL(x): 165 166 /* 167 * ...and local variables. 168 */ 169 #define LOCAL(x) \ 170 _C_LABEL(x): 171 172 #define ASLOCAL(x) \ 173 _ASM_LABEL(x): 174 175 /* 176 * Items in the BSS segment. 177 */ 178 #define BSS(name, size) \ 179 .comm _C_LABEL(name),size 180 181 #define ASBSS(name, size) \ 182 .comm _ASM_LABEL(name),size 183 184 /* 185 * Need a better place for these but these are common across 186 * all m68k ports so let's define just once. 187 */ 188 #ifdef __mcoldfire__ 189 #define INTERRUPT_SAVEREG lea -16(%sp),%sp; moveml #0xC0C0,(%sp) 190 #define INTERRUPT_RESTOREREG moveml (%sp),#0x0303; lea 16(%sp),%sp 191 #else 192 #define INTERRUPT_SAVEREG moveml #0xC0C0,-(%sp) 193 #define INTERRUPT_RESTOREREG moveml (%sp)+,#0x0303 194 #endif 195 196 #ifdef _KERNEL 197 /* 198 * Shorthand for calling panic(). 199 * Note the side-effect: it uses up the 9: label, so be careful! 200 */ 201 #define PANIC(x) \ 202 pea 9f ; \ 203 jbsr _C_LABEL(panic) ; \ 204 9: .asciz x ; \ 205 .even 206 207 /* 64-bit counter increments */ 208 #define CPUINFO_INCREMENT(n) \ 209 lea _C_LABEL(cpu_info_store)+(n)+4,%a1; \ 210 addq.l #1,(%a1); \ 211 clr.l %d0; /* doesn't change CCR[X] */ \ 212 move.l -(%a1),%d1; /* doesn't change CCR[X] */ \ 213 addx.l %d0,%d1; \ 214 move.l %d1,(%a1) 215 216 /* 64-bit counter increments */ 217 #define CPUINFO_ADD(n, addend) \ 218 lea _C_LABEL(cpu_info_store)+(n)+4,%a1; \ 219 add.l addend,(%a1); \ 220 clr.l %d0; /* doesn't change CCR[X] */ \ 221 move.l -(%a1),%d1; /* doesn't change CCR[X] */ \ 222 addx.l %d0,%d1; \ 223 move.l %d1,(%a1) 224 225 #endif /* _KERNEL */ 226 227 /* 228 * Shorthand for defining vectors for the vector table. 229 */ 230 #define VECTOR(x) \ 231 .long _C_LABEL(x) 232 233 #define ASVECTOR(x) \ 234 .long _ASM_LABEL(x) 235 236 #define VECTOR_UNUSED \ 237 .long 0 238 239 #define WEAK_ALIAS(alias,sym) \ 240 .weak alias; \ 241 alias = sym 242 243 /* 244 * STRONG_ALIAS: create a strong alias. 245 */ 246 #define STRONG_ALIAS(alias,sym) \ 247 .globl alias; \ 248 alias = sym 249 250 #ifdef __STDC__ 251 #define WARN_REFERENCES(sym,msg) \ 252 .pushsection .gnu.warning. ## sym; \ 253 .ascii msg; \ 254 .popsection 255 #else 256 #define WARN_REFERENCES(sym,msg) \ 257 .pushsection .gnu.warning./**/sym; \ 258 .ascii msg; \ 259 .popsection 260 #endif /* __STDC__ */ 261 262 /* 263 * Macros to hide shortcomings in the 68010. 264 */ 265 #ifdef __mc68010__ 266 #define EXTBL(reg) \ 267 extw reg ; \ 268 extl reg 269 #else /* __mc68010__ */ 270 #define EXTBL(reg) \ 271 extbl reg 272 #endif /* __mc68010__ */ 273 274 #endif /* _M68K_ASM_H_ */ 275