1 /* $NetBSD: asm.h,v 1.29 2010/03/09 22:36:41 matt 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) .pushsection ".ident"; .asciz x; .popsection 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 lis tmp2,_C_LABEL(emptyidlespin)@h; \ 172 ori tmp2,tmp2,_C_LABEL(emptyidlespin)@l; \ 173 stptr tmp2,CI_IDLESPIN(tmp1); \ 174 li tmp2,-1; \ 175 stint tmp2,CI_INTRDEPTH(tmp1); \ 176 li tmp2,0; \ 177 stptr tmp2,-CALLFRAMELEN(er); /* terminate idle stack chain */\ 178 lis tmp1,_C_LABEL(lwp0)+L_PCB@ha; /* XXXuvm_lwp_getuarea */ \ 179 stptr er,_C_LABEL(lwp0)+L_PCB@l(tmp1); \ 180 addi er,er,USPACE; /* stackpointer for proc0 */ \ 181 addi sp,er,-FRAMELEN; /* stackpointer for proc0 */ \ 182 /* er = end of mem reserved for kernel */ \ 183 stptru tmp2,-CALLFRAMELEN(sp) /* end of stack chain */ 184 185 #endif 186 187 /* Condition Register Bit Fields */ 188 189 #if !defined(_NOREGNAMES) 190 #if defined(_KERNEL) || defined(_STANDALONE) 191 #define cr0 0 192 #define cr1 1 193 #define cr2 2 194 #define cr3 3 195 #define cr4 4 196 #define cr5 5 197 #define cr6 6 198 #define cr7 7 199 #endif 200 201 /* General Purpose Registers (GPRs) */ 202 203 #if defined(_KERNEL) || defined(_STANDALONE) 204 #define r0 0 205 #define r1 1 206 #define r2 2 207 #define r3 3 208 #define r4 4 209 #define r5 5 210 #define r6 6 211 #define r7 7 212 #define r8 8 213 #define r9 9 214 #define r10 10 215 #define r11 11 216 #define r12 12 217 #define r13 13 218 #define r14 14 219 #define r15 15 220 #define r16 16 221 #define r17 17 222 #define r18 18 223 #define r19 19 224 #define r20 20 225 #define r21 21 226 #define r22 22 227 #define r23 23 228 #define r24 24 229 #define r25 25 230 #define r26 26 231 #define r27 27 232 #define r28 28 233 #define r29 29 234 #define r30 30 235 #define r31 31 236 #endif 237 238 /* Floating Point Registers (FPRs) */ 239 240 #if defined(_KERNEL) || defined(_STANDALONE) 241 #define fr0 0 242 #define fr1 1 243 #define fr2 2 244 #define fr3 3 245 #define fr4 4 246 #define fr5 5 247 #define fr6 6 248 #define fr7 7 249 #define fr8 8 250 #define fr9 9 251 #define fr10 10 252 #define fr11 11 253 #define fr12 12 254 #define fr13 13 255 #define fr14 14 256 #define fr15 15 257 #define fr16 16 258 #define fr17 17 259 #define fr18 18 260 #define fr19 19 261 #define fr20 20 262 #define fr21 21 263 #define fr22 22 264 #define fr23 23 265 #define fr24 24 266 #define fr25 25 267 #define fr26 26 268 #define fr27 27 269 #define fr28 28 270 #define fr29 29 271 #define fr30 30 272 #define fr31 31 273 #endif 274 #endif /* !_NOREGNAMES */ 275 276 /* 277 * Add some psuedo instructions to made sharing of assembly versions of 278 * ILP32 and LP64 code possible. 279 */ 280 #define ldint lwz /* not needed but for completeness */ 281 #define ldintu lwzu /* not needed but for completeness */ 282 #define stint stw /* not needed but for completeness */ 283 #define stintu stwu /* not needed but for completeness */ 284 285 #ifndef _LP64 286 287 #define ldlong lwz /* load "C" long */ 288 #define ldlongu lwzu /* load "C" long with udpate */ 289 #define stlong stw /* load "C" long */ 290 #define stlongu stwu /* load "C" long with udpate */ 291 #define ldptr lwz /* load "C" pointer */ 292 #define ldptru lwzu /* load "C" pointer with udpate */ 293 #define stptr stw /* load "C" pointer */ 294 #define stptru stwu /* load "C" pointer with udpate */ 295 #define ldreg lwz /* load PPC general register */ 296 #define ldregu lwzu /* load PPC general register with udpate */ 297 #define streg stw /* load PPC general register */ 298 #define stregu stwu /* load PPC general register with udpate */ 299 #define SZREG 4 /* 4 byte registers */ 300 301 #define lptrarx lwarx /* load "C" pointer with reservation */ 302 #define llongarx lwarx /* load "C" long with reservation */ 303 #define lregarx lwarx /* load PPC general register with reservation */ 304 305 #define stptrcx stwcx /* store "C" pointer conditional */ 306 #define stlongcx stwcx /* store "C" long conditional */ 307 #define stregcx stwcx /* store PPC general register conditional */ 308 309 #define clrrptri clrrwi /* clear right "C" pointer immediate */ 310 #define clrrlongi clrrwi /* clear right "C" long immediate */ 311 #define clrrregi clrrwi /* clear right PPC general register immediate */ 312 313 #else 314 315 #define ldlong ld /* load "C" long */ 316 #define ldlongu ldu /* load "C" long with update */ 317 #define stlong std /* store "C" long */ 318 #define stlongu stdu /* store "C" long with update */ 319 #define ldptr ld /* load "C" pointer */ 320 #define ldptru ldu /* load "C" pointer with update */ 321 #define stptr std /* store "C" pointer */ 322 #define stptru stdu /* store "C" pointer with update */ 323 #define ldreg ld /* load PPC general register */ 324 #define ldregu ldu /* load PPC general register with update */ 325 #define streg std /* store PPC general register */ 326 #define stregu stdu /* store PPC general register with update */ 327 /* redefined this to force an error on PPC64 to catch their use. */ 328 #define lmw lmd /* load multiple PPC general registers */ 329 #define stmw stmd /* store multiple PPC general registers */ 330 #define SZREG 8 /* 8 byte registers */ 331 332 #define lptrarx ldarx /* load "C" pointer with reservation */ 333 #define llongarx ldarx /* load "C" long with reservation */ 334 #define lregarx ldarx /* load PPC general register with reservation */ 335 336 #define stptrcx stdcx /* store "C" pointer conditional */ 337 #define stlongcx stdcx /* store "C" long conditional */ 338 #define stregax stdcx /* store PPC general register conditional */ 339 340 #define clrrptri clrrdi /* clear right "C" pointer immediate */ 341 #define clrrlongi clrrdi /* clear right "C" long immediate */ 342 #define clrrregi clrrdi /* clear right PPC general register immediate */ 343 344 #endif 345 346 #ifdef _LOCORE 347 .macro stmd r,dst 348 i = 0 349 .rept 32-\r 350 std i+\r, i*8+\dst 351 i = i + 1 352 .endr 353 .endm 354 355 .macro lmd r,dst 356 i = 0 357 .rept 32-\r 358 ld i+\r, i*8+\dst 359 i = i + 1 360 .endr 361 .endm 362 #endif 363 364 #endif /* !_PPC_ASM_H_ */ 365