sys/arch/powerpc/include/asm.h

   1 /*      $NetBSD: asm.h,v 1.27 2009/11/26 00:19:20 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)        .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         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_ */