1 /* $NetBSD: asm.h,v 1.23 2006/07/12 23:52:21 ross Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _PPC_ASM_H_ 35 #define _PPC_ASM_H_ 36 37 #ifdef _LP64 38 39 /* ppc64 is always PIC, r2 is always the TOC */ 40 41 #define PIC_PLT(x) .x 42 43 #else 44 45 #ifdef PIC 46 #define PIC_PROLOGUE XXX 47 #define PIC_EPILOGUE XXX 48 #define PIC_PLT(x) x@plt 49 #ifdef __STDC__ 50 #define PIC_GOT(x) XXX 51 #define PIC_GOTOFF(x) XXX 52 #else /* not __STDC__ */ 53 #define PIC_GOT(x) XXX 54 #define PIC_GOTOFF(x) XXX 55 #endif /* __STDC__ */ 56 #else 57 #define PIC_PROLOGUE 58 #define PIC_EPILOGUE 59 #define PIC_PLT(x) x 60 #define PIC_GOT(x) x 61 #define PIC_GOTOFF(x) x 62 #endif 63 64 #endif 65 66 #define _C_LABEL(x) x 67 #define _ASM_LABEL(x) x 68 69 #define _GLOBAL(x) \ 70 .data; .align 2; .globl x; x: 71 72 #ifdef GPROF 73 # define _PROF_PROLOGUE mflr 0; stw 0,4(1); bl _mcount 74 #else 75 # define _PROF_PROLOGUE 76 #endif 77 78 #ifdef _LP64 79 80 #define SF_HEADER_SZ 48 81 #define SF_PARAM_SZ 64 82 #define SF_SZ (SF_HEADER_SZ + SF_PARAM_SZ) 83 84 #define SF_SP 0 85 #define SF_CR 8 86 #define SF_LR 16 87 #define SF_PARAM SF_HEADER_SZ 88 89 #define ENTRY(y) \ 90 .globl y; \ 91 .section ".opd","aw"; \ 92 .align 3; \ 93 y: .quad .y,.TOC.@tocbase,0; \ 94 .previous; \ 95 .size y,24; \ 96 .type .y,@function; \ 97 .globl .y; \ 98 .align 3; \ 99 .y: 100 101 #define CALL(y) \ 102 bl .y; \ 103 nop 104 105 #define ENTRY_NOPROFILE(y) ENTRY(y) 106 #define ASENTRY(y) ENTRY(y) 107 #else 108 109 #define _ENTRY(x) \ 110 .text; .align 2; .globl x; .type x,@function; x: 111 112 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 113 114 #define ENTRY_NOPROFILE(y) _ENTRY(_C_LABEL(y)) 115 116 #define CALL(y) \ 117 bl y 118 119 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 120 #endif 121 122 #define GLOBAL(y) _GLOBAL(_C_LABEL(y)) 123 124 #define ASMSTR .asciz 125 126 #define RCSID(x) .text; .asciz x 127 128 #ifdef __ELF__ 129 #define WEAK_ALIAS(alias,sym) \ 130 .weak alias; \ 131 alias = sym 132 #endif 133 /* 134 * STRONG_ALIAS: create a strong alias. 135 */ 136 #define STRONG_ALIAS(alias,sym) \ 137 .globl alias; \ 138 alias = sym 139 140 #ifdef __STDC__ 141 #define WARN_REFERENCES(_sym,_msg) \ 142 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 143 #else 144 #define WARN_REFERENCES(_sym,_msg) \ 145 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 146 #endif /* __STDC__ */ 147 148 #ifdef _KERNEL 149 /* 150 * Get cpu_info pointer for current processor. Always in SPRG0. *ALWAYS* 151 */ 152 #define GET_CPUINFO(r) mfsprg r,0 153 /* 154 * IN: 155 * R4[er] = first free byte beyond end/esym. 156 * 157 * OUT: 158 * R1[sp] = new kernel stack 159 * R4[er] = kernelend 160 */ 161 162 #define INIT_CPUINFO(er,sp,tmp1,tmp2) \ 163 li tmp1,PGOFSET; \ 164 add er,er,tmp1; \ 165 andc er,er,tmp1; /* page align */ \ 166 lis tmp1,_C_LABEL(cpu_info)@ha; \ 167 addi tmp1,tmp1,_C_LABEL(cpu_info)@l; \ 168 mtsprg0 tmp1; /* save for later use */ \ 169 addi er,er,INTSTK; \ 170 stptr er,CI_INTSTK(tmp1); \ 171 stptr er,CI_IDLE_PCB(tmp1); \ 172 addi er,er,USPACE; /* space for idle_u */ \ 173 lis tmp2,_C_LABEL(emptyidlespin)@h; \ 174 ori tmp2,tmp2,_C_LABEL(emptyidlespin)@l; \ 175 stptr tmp2,CI_IDLESPIN(tmp1); \ 176 li tmp2,-1; \ 177 stint tmp2,CI_INTRDEPTH(tmp1); \ 178 li tmp2,0; \ 179 stptr tmp2,-CALLFRAMELEN(er); /* terminate idle stack chain */\ 180 lis tmp1,_C_LABEL(proc0paddr)@ha; \ 181 stptr er,_C_LABEL(proc0paddr)@l(tmp1); \ 182 addi er,er,USPACE; /* stackpointer for proc0 */ \ 183 addi sp,er,-FRAMELEN; /* stackpointer for proc0 */ \ 184 /* er = end of mem reserved for kernel */ \ 185 stptru tmp2,-CALLFRAMELEN(sp) /* end of stack chain */ 186 187 #endif 188 189 /* Condition Register Bit Fields */ 190 191 #if !defined(_NOREGNAMES) 192 #if defined(_KERNEL) || defined(_STANDALONE) 193 #define cr0 0 194 #define cr1 1 195 #define cr2 2 196 #define cr3 3 197 #define cr4 4 198 #define cr5 5 199 #define cr6 6 200 #define cr7 7 201 #endif 202 203 /* General Purpose Registers (GPRs) */ 204 205 #if defined(_KERNEL) || defined(_STANDALONE) 206 #define r0 0 207 #define r1 1 208 #define r2 2 209 #define r3 3 210 #define r4 4 211 #define r5 5 212 #define r6 6 213 #define r7 7 214 #define r8 8 215 #define r9 9 216 #define r10 10 217 #define r11 11 218 #define r12 12 219 #define r13 13 220 #define r14 14 221 #define r15 15 222 #define r16 16 223 #define r17 17 224 #define r18 18 225 #define r19 19 226 #define r20 20 227 #define r21 21 228 #define r22 22 229 #define r23 23 230 #define r24 24 231 #define r25 25 232 #define r26 26 233 #define r27 27 234 #define r28 28 235 #define r29 29 236 #define r30 30 237 #define r31 31 238 #endif 239 240 /* Floating Point Registers (FPRs) */ 241 242 #if defined(_KERNEL) || defined(_STANDALONE) 243 #define fr0 0 244 #define fr1 1 245 #define fr2 2 246 #define fr3 3 247 #define fr4 4 248 #define fr5 5 249 #define fr6 6 250 #define fr7 7 251 #define fr8 8 252 #define fr9 9 253 #define fr10 10 254 #define fr11 11 255 #define fr12 12 256 #define fr13 13 257 #define fr14 14 258 #define fr15 15 259 #define fr16 16 260 #define fr17 17 261 #define fr18 18 262 #define fr19 19 263 #define fr20 20 264 #define fr21 21 265 #define fr22 22 266 #define fr23 23 267 #define fr24 24 268 #define fr25 25 269 #define fr26 26 270 #define fr27 27 271 #define fr28 28 272 #define fr29 29 273 #define fr30 30 274 #define fr31 31 275 #endif 276 #endif /* !_NOREGNAMES */ 277 278 /* 279 * Add some psuedo instructions to made sharing of assembly versions of 280 * ILP32 and LP64 code possible. 281 */ 282 #define ldint lwz /* not needed but for completeness */ 283 #define ldintu lwzu /* not needed but for completeness */ 284 #define stint stw /* not needed but for completeness */ 285 #define stintu stwu /* not needed but for completeness */ 286 287 #ifndef _LP64 288 289 #define ldlong lwz /* load "C" long */ 290 #define ldlongu lwzu /* load "C" long with udpate */ 291 #define stlong stw /* load "C" long */ 292 #define stlongu stwu /* load "C" long with udpate */ 293 #define ldptr lwz /* load "C" pointer */ 294 #define ldptru lwzu /* load "C" pointer with udpate */ 295 #define stptr stw /* load "C" pointer */ 296 #define stptru stwu /* load "C" pointer with udpate */ 297 #define ldreg lwz /* load PPC general register */ 298 #define ldregu lwzu /* load PPC general register with udpate */ 299 #define streg stw /* load PPC general register */ 300 #define stregu stwu /* load PPC general register with udpate */ 301 #define SZREG 4 /* 4 byte registers */ 302 303 #else 304 305 #define ldlong ld /* load "C" long */ 306 #define ldlongu ldu /* load "C" long with update */ 307 #define stlong std /* store "C" long */ 308 #define stlongu stdu /* store "C" long with update */ 309 #define ldptr ld /* load "C" pointer */ 310 #define ldptru ldu /* load "C" pointer with update */ 311 #define stptr std /* store "C" pointer */ 312 #define stptru stdu /* store "C" pointer with update */ 313 #define ldreg ld /* load PPC general register */ 314 #define ldregu ldu /* load PPC general register with update */ 315 #define streg std /* store PPC general register */ 316 #define stregu stdu /* store PPC general register with update */ 317 /* redefined this to force an error on PPC64 to catch their use. */ 318 #define lmw lmd /* load multiple PPC general registers */ 319 #define stmw stmd /* store multiple PPC general registers */ 320 #define SZREG 8 /* 8 byte registers */ 321 322 #endif 323 324 #ifdef _LOCORE 325 .macro stmd r,dst 326 i = 0 327 .rept 32-\r 328 std i+\r, i*8+\dst 329 i = i + 1 330 .endr 331 .endm 332 333 .macro lmd r,dst 334 i = 0 335 .rept 32-\r 336 ld i+\r, i*8+\dst 337 i = i + 1 338 .endr 339 .endm 340 #endif 341 342 #endif /* !_PPC_ASM_H_ */ 343