include/asm-parisc/assembly.h

   1 /*
   2  * Copyright (C) 1999 Hewlett-Packard (Frank Rowand)
   3  * Copyright (C) 1999 Philipp Rumpf <prumpf@tux.org>
   4  * Copyright (C) 1999 SuSE GmbH
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2, or (at your option)
   9  *    any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License
  17  *    along with this program; if not, write to the Free Software
  18  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #ifndef _PARISC_ASSEMBLY_H
  22 #define _PARISC_ASSEMBLY_H
  23
  24 #define CALLEE_FLOAT_FRAME_SIZE 80
  25
  26 #ifdef CONFIG_64BIT
  27 #define LDREG   ldd
  28 #define STREG   std
  29 #define LDREGX  ldd,s
  30 #define LDREGM  ldd,mb
  31 #define STREGM  std,ma
  32 #define SHRREG  shrd
  33 #define RP_OFFSET       16
  34 #define FRAME_SIZE      128
  35 #define CALLEE_REG_FRAME_SIZE   144
  36 #else   /* CONFIG_64BIT */
  37 #define LDREG   ldw
  38 #define STREG   stw
  39 #define LDREGX  ldwx,s
  40 #define LDREGM  ldwm
  41 #define STREGM  stwm
  42 #define SHRREG  shr
  43 #define RP_OFFSET       20
  44 #define FRAME_SIZE      64
  45 #define CALLEE_REG_FRAME_SIZE   128
  46 #endif
  47
  48 #define CALLEE_SAVE_FRAME_SIZE (CALLEE_REG_FRAME_SIZE + CALLEE_FLOAT_FRAME_SIZE)
  49
  50 #ifdef CONFIG_PA20
  51 #define LDCW            ldcw,co
  52 #define BL              b,l
  53 # ifdef CONFIG_64BIT
  54 #  define LEVEL         2.0w
  55 # else
  56 #  define LEVEL         2.0
  57 # endif
  58 #else
  59 #define LDCW            ldcw
  60 #define BL              bl
  61 #define LEVEL           1.1
  62 #endif
  63
  64 #ifdef __ASSEMBLY__
  65
  66 #ifdef __LP64__
  67 /* the 64-bit pa gnu assembler unfortunately defaults to .level 1.1 or 2.0 so
  68  * work around that for now... */
  69         .level 2.0w
  70 #endif
  71
  72 #include <asm/asm-offsets.h>
  73 #include <asm/page.h>
  74
  75 #include <asm/asmregs.h>
  76
  77         sp      =       30
  78         gp      =       27
  79         ipsw    =       22
  80
  81         /*
  82          * We provide two versions of each macro to convert from physical
  83          * to virtual and vice versa. The "_r1" versions take one argument
  84          * register, but trashes r1 to do the conversion. The other
  85          * version takes two arguments: a src and destination register.
  86          * However, the source and destination registers can not be
  87          * the same register.
  88          */
  89
  90         .macro  tophys  grvirt, grphys
  91         ldil    L%(__PAGE_OFFSET), \grphys
  92         sub     \grvirt, \grphys, \grphys
  93         .endm
  94
  95         .macro  tovirt  grphys, grvirt
  96         ldil    L%(__PAGE_OFFSET), \grvirt
  97         add     \grphys, \grvirt, \grvirt
  98         .endm
  99
 100         .macro  tophys_r1  gr
 101         ldil    L%(__PAGE_OFFSET), %r1
 102         sub     \gr, %r1, \gr
 103         .endm
 104
 105         .macro  tovirt_r1  gr
 106         ldil    L%(__PAGE_OFFSET), %r1
 107         add     \gr, %r1, \gr
 108         .endm
 109
 110         .macro delay value
 111         ldil    L%\value, 1
 112         ldo     R%\value(1), 1
 113         addib,UV,n -1,1,.
 114         addib,NUV,n -1,1,.+8
 115         nop
 116         .endm
 117
 118         .macro  debug value
 119         .endm
 120
 121
 122         /* Shift Left - note the r and t can NOT be the same! */
 123         .macro shl r, sa, t
 124         dep,z   \r, 31-\sa, 32-\sa, \t
 125         .endm
 126
 127         /* The PA 2.0 shift left */
 128         .macro shlw r, sa, t
 129         depw,z  \r, 31-\sa, 32-\sa, \t
 130         .endm
 131
 132         /* And the PA 2.0W shift left */
 133         .macro shld r, sa, t
 134         depd,z  \r, 63-\sa, 64-\sa, \t
 135         .endm
 136
 137         /* Shift Right - note the r and t can NOT be the same! */
 138         .macro shr r, sa, t
 139         extru \r, 31-\sa, 32-\sa, \t
 140         .endm
 141
 142         /* pa20w version of shift right */
 143         .macro shrd r, sa, t
 144         extrd,u \r, 63-\sa, 64-\sa, \t
 145         .endm
 146
 147         /* load 32-bit 'value' into 'reg' compensating for the ldil
 148          * sign-extension when running in wide mode.
 149          * WARNING!! neither 'value' nor 'reg' can be expressions
 150          * containing '.'!!!! */
 151         .macro  load32 value, reg
 152         ldil    L%\value, \reg
 153         ldo     R%\value(\reg), \reg
 154         .endm
 155
 156         .macro loadgp
 157 #ifdef __LP64__
 158         ldil            L%__gp, %r27
 159         ldo             R%__gp(%r27), %r27
 160 #else
 161         ldil            L%$global$, %r27
 162         ldo             R%$global$(%r27), %r27
 163 #endif
 164         .endm
 165
 166 #define SAVE_SP(r, where) mfsp r, %r1 ! STREG %r1, where
 167 #define REST_SP(r, where) LDREG where, %r1 ! mtsp %r1, r
 168 #define SAVE_CR(r, where) mfctl r, %r1 ! STREG %r1, where
 169 #define REST_CR(r, where) LDREG where, %r1 ! mtctl %r1, r
 170
 171         .macro  save_general    regs
 172         STREG %r1, PT_GR1 (\regs)
 173         STREG %r2, PT_GR2 (\regs)
 174         STREG %r3, PT_GR3 (\regs)
 175         STREG %r4, PT_GR4 (\regs)
 176         STREG %r5, PT_GR5 (\regs)
 177         STREG %r6, PT_GR6 (\regs)
 178         STREG %r7, PT_GR7 (\regs)
 179         STREG %r8, PT_GR8 (\regs)
 180         STREG %r9, PT_GR9 (\regs)
 181         STREG %r10, PT_GR10(\regs)
 182         STREG %r11, PT_GR11(\regs)
 183         STREG %r12, PT_GR12(\regs)
 184         STREG %r13, PT_GR13(\regs)
 185         STREG %r14, PT_GR14(\regs)
 186         STREG %r15, PT_GR15(\regs)
 187         STREG %r16, PT_GR16(\regs)
 188         STREG %r17, PT_GR17(\regs)
 189         STREG %r18, PT_GR18(\regs)
 190         STREG %r19, PT_GR19(\regs)
 191         STREG %r20, PT_GR20(\regs)
 192         STREG %r21, PT_GR21(\regs)
 193         STREG %r22, PT_GR22(\regs)
 194         STREG %r23, PT_GR23(\regs)
 195         STREG %r24, PT_GR24(\regs)
 196         STREG %r25, PT_GR25(\regs)
 197         /* r26 is saved in get_stack and used to preserve a value across virt_map */
 198         STREG %r27, PT_GR27(\regs)
 199         STREG %r28, PT_GR28(\regs)
 200         /* r29 is saved in get_stack and used to point to saved registers */
 201         /* r30 stack pointer saved in get_stack */
 202         STREG %r31, PT_GR31(\regs)
 203         .endm
 204
 205         .macro  rest_general    regs
 206         /* r1 used as a temp in rest_stack and is restored there */
 207         LDREG PT_GR2 (\regs), %r2
 208         LDREG PT_GR3 (\regs), %r3
 209         LDREG PT_GR4 (\regs), %r4
 210         LDREG PT_GR5 (\regs), %r5
 211         LDREG PT_GR6 (\regs), %r6
 212         LDREG PT_GR7 (\regs), %r7
 213         LDREG PT_GR8 (\regs), %r8
 214         LDREG PT_GR9 (\regs), %r9
 215         LDREG PT_GR10(\regs), %r10
 216         LDREG PT_GR11(\regs), %r11
 217         LDREG PT_GR12(\regs), %r12
 218         LDREG PT_GR13(\regs), %r13
 219         LDREG PT_GR14(\regs), %r14
 220         LDREG PT_GR15(\regs), %r15
 221         LDREG PT_GR16(\regs), %r16
 222         LDREG PT_GR17(\regs), %r17
 223         LDREG PT_GR18(\regs), %r18
 224         LDREG PT_GR19(\regs), %r19
 225         LDREG PT_GR20(\regs), %r20
 226         LDREG PT_GR21(\regs), %r21
 227         LDREG PT_GR22(\regs), %r22
 228         LDREG PT_GR23(\regs), %r23
 229         LDREG PT_GR24(\regs), %r24
 230         LDREG PT_GR25(\regs), %r25
 231         LDREG PT_GR26(\regs), %r26
 232         LDREG PT_GR27(\regs), %r27
 233         LDREG PT_GR28(\regs), %r28
 234         /* r29 points to register save area, and is restored in rest_stack */
 235         /* r30 stack pointer restored in rest_stack */
 236         LDREG PT_GR31(\regs), %r31
 237         .endm
 238
 239         .macro  save_fp         regs
 240         fstd,ma  %fr0, 8(\regs)
 241         fstd,ma  %fr1, 8(\regs)
 242         fstd,ma  %fr2, 8(\regs)
 243         fstd,ma  %fr3, 8(\regs)
 244         fstd,ma  %fr4, 8(\regs)
 245         fstd,ma  %fr5, 8(\regs)
 246         fstd,ma  %fr6, 8(\regs)
 247         fstd,ma  %fr7, 8(\regs)
 248         fstd,ma  %fr8, 8(\regs)
 249         fstd,ma  %fr9, 8(\regs)
 250         fstd,ma %fr10, 8(\regs)
 251         fstd,ma %fr11, 8(\regs)
 252         fstd,ma %fr12, 8(\regs)
 253         fstd,ma %fr13, 8(\regs)
 254         fstd,ma %fr14, 8(\regs)
 255         fstd,ma %fr15, 8(\regs)
 256         fstd,ma %fr16, 8(\regs)
 257         fstd,ma %fr17, 8(\regs)
 258         fstd,ma %fr18, 8(\regs)
 259         fstd,ma %fr19, 8(\regs)
 260         fstd,ma %fr20, 8(\regs)
 261         fstd,ma %fr21, 8(\regs)
 262         fstd,ma %fr22, 8(\regs)
 263         fstd,ma %fr23, 8(\regs)
 264         fstd,ma %fr24, 8(\regs)
 265         fstd,ma %fr25, 8(\regs)
 266         fstd,ma %fr26, 8(\regs)
 267         fstd,ma %fr27, 8(\regs)
 268         fstd,ma %fr28, 8(\regs)
 269         fstd,ma %fr29, 8(\regs)
 270         fstd,ma %fr30, 8(\regs)
 271         fstd    %fr31, 0(\regs)
 272         .endm
 273
 274         .macro  rest_fp         regs
 275         fldd    0(\regs),        %fr31
 276         fldd,mb -8(\regs),       %fr30
 277         fldd,mb -8(\regs),       %fr29
 278         fldd,mb -8(\regs),       %fr28
 279         fldd,mb -8(\regs),       %fr27
 280         fldd,mb -8(\regs),       %fr26
 281         fldd,mb -8(\regs),       %fr25
 282         fldd,mb -8(\regs),       %fr24
 283         fldd,mb -8(\regs),       %fr23
 284         fldd,mb -8(\regs),       %fr22
 285         fldd,mb -8(\regs),       %fr21
 286         fldd,mb -8(\regs),       %fr20
 287         fldd,mb -8(\regs),       %fr19
 288         fldd,mb -8(\regs),       %fr18
 289         fldd,mb -8(\regs),       %fr17
 290         fldd,mb -8(\regs),       %fr16
 291         fldd,mb -8(\regs),       %fr15
 292         fldd,mb -8(\regs),       %fr14
 293         fldd,mb -8(\regs),       %fr13
 294         fldd,mb -8(\regs),       %fr12
 295         fldd,mb -8(\regs),       %fr11
 296         fldd,mb -8(\regs),       %fr10
 297         fldd,mb -8(\regs),       %fr9
 298         fldd,mb -8(\regs),       %fr8
 299         fldd,mb -8(\regs),       %fr7
 300         fldd,mb -8(\regs),       %fr6
 301         fldd,mb -8(\regs),       %fr5
 302         fldd,mb -8(\regs),       %fr4
 303         fldd,mb -8(\regs),       %fr3
 304         fldd,mb -8(\regs),       %fr2
 305         fldd,mb -8(\regs),       %fr1
 306         fldd,mb -8(\regs),       %fr0
 307         .endm
 308
 309         .macro  callee_save_float
 310         fstd,ma  %fr12, 8(%r30)
 311         fstd,ma  %fr13, 8(%r30)
 312         fstd,ma  %fr14, 8(%r30)
 313         fstd,ma  %fr15, 8(%r30)
 314         fstd,ma  %fr16, 8(%r30)
 315         fstd,ma  %fr17, 8(%r30)
 316         fstd,ma  %fr18, 8(%r30)
 317         fstd,ma  %fr19, 8(%r30)
 318         fstd,ma  %fr20, 8(%r30)
 319         fstd,ma  %fr21, 8(%r30)
 320         .endm
 321
 322         .macro  callee_rest_float
 323         fldd,mb -8(%r30),   %fr21
 324         fldd,mb -8(%r30),   %fr20
 325         fldd,mb -8(%r30),   %fr19
 326         fldd,mb -8(%r30),   %fr18
 327         fldd,mb -8(%r30),   %fr17
 328         fldd,mb -8(%r30),   %fr16
 329         fldd,mb -8(%r30),   %fr15
 330         fldd,mb -8(%r30),   %fr14
 331         fldd,mb -8(%r30),   %fr13
 332         fldd,mb -8(%r30),   %fr12
 333         .endm
 334
 335 #ifdef __LP64__
 336         .macro  callee_save
 337         std,ma    %r3,   CALLEE_REG_FRAME_SIZE(%r30)
 338         mfctl     %cr27, %r3
 339         std       %r4,  -136(%r30)
 340         std       %r5,  -128(%r30)
 341         std       %r6,  -120(%r30)
 342         std       %r7,  -112(%r30)
 343         std       %r8,  -104(%r30)
 344         std       %r9,   -96(%r30)
 345         std      %r10,   -88(%r30)
 346         std      %r11,   -80(%r30)
 347         std      %r12,   -72(%r30)
 348         std      %r13,   -64(%r30)
 349         std      %r14,   -56(%r30)
 350         std      %r15,   -48(%r30)
 351         std      %r16,   -40(%r30)
 352         std      %r17,   -32(%r30)
 353         std      %r18,   -24(%r30)
 354         std       %r3,   -16(%r30)
 355         .endm
 356
 357         .macro  callee_rest
 358         ldd      -16(%r30),    %r3
 359         ldd      -24(%r30),   %r18
 360         ldd      -32(%r30),   %r17
 361         ldd      -40(%r30),   %r16
 362         ldd      -48(%r30),   %r15
 363         ldd      -56(%r30),   %r14
 364         ldd      -64(%r30),   %r13
 365         ldd      -72(%r30),   %r12
 366         ldd      -80(%r30),   %r11
 367         ldd      -88(%r30),   %r10
 368         ldd      -96(%r30),    %r9
 369         ldd     -104(%r30),    %r8
 370         ldd     -112(%r30),    %r7
 371         ldd     -120(%r30),    %r6
 372         ldd     -128(%r30),    %r5
 373         ldd     -136(%r30),    %r4
 374         mtctl   %r3, %cr27
 375         ldd,mb  -CALLEE_REG_FRAME_SIZE(%r30),    %r3
 376         .endm
 377
 378 #else /* ! __LP64__ */
 379
 380         .macro  callee_save
 381         stw,ma   %r3,   CALLEE_REG_FRAME_SIZE(%r30)
 382         mfctl    %cr27, %r3
 383         stw      %r4,   -124(%r30)
 384         stw      %r5,   -120(%r30)
 385         stw      %r6,   -116(%r30)
 386         stw      %r7,   -112(%r30)
 387         stw      %r8,   -108(%r30)
 388         stw      %r9,   -104(%r30)
 389         stw      %r10,  -100(%r30)
 390         stw      %r11,   -96(%r30)
 391         stw      %r12,   -92(%r30)
 392         stw      %r13,   -88(%r30)
 393         stw      %r14,   -84(%r30)
 394         stw      %r15,   -80(%r30)
 395         stw      %r16,   -76(%r30)
 396         stw      %r17,   -72(%r30)
 397         stw      %r18,   -68(%r30)
 398         stw       %r3,   -64(%r30)
 399         .endm
 400
 401         .macro  callee_rest
 402         ldw      -64(%r30),    %r3
 403         ldw      -68(%r30),   %r18
 404         ldw      -72(%r30),   %r17
 405         ldw      -76(%r30),   %r16
 406         ldw      -80(%r30),   %r15
 407         ldw      -84(%r30),   %r14
 408         ldw      -88(%r30),   %r13
 409         ldw      -92(%r30),   %r12
 410         ldw      -96(%r30),   %r11
 411         ldw     -100(%r30),   %r10
 412         ldw     -104(%r30),   %r9
 413         ldw     -108(%r30),   %r8
 414         ldw     -112(%r30),   %r7
 415         ldw     -116(%r30),   %r6
 416         ldw     -120(%r30),   %r5
 417         ldw     -124(%r30),   %r4
 418         mtctl   %r3, %cr27
 419         ldw,mb  -CALLEE_REG_FRAME_SIZE(%r30),   %r3
 420         .endm
 421 #endif /* ! __LP64__ */
 422
 423         .macro  save_specials   regs
 424
 425         SAVE_SP  (%sr0, PT_SR0 (\regs))
 426         SAVE_SP  (%sr1, PT_SR1 (\regs))
 427         SAVE_SP  (%sr2, PT_SR2 (\regs))
 428         SAVE_SP  (%sr3, PT_SR3 (\regs))
 429         SAVE_SP  (%sr4, PT_SR4 (\regs))
 430         SAVE_SP  (%sr5, PT_SR5 (\regs))
 431         SAVE_SP  (%sr6, PT_SR6 (\regs))
 432         SAVE_SP  (%sr7, PT_SR7 (\regs))
 433
 434         SAVE_CR  (%cr17, PT_IASQ0(\regs))
 435         mtctl    %r0,   %cr17
 436         SAVE_CR  (%cr17, PT_IASQ1(\regs))
 437
 438         SAVE_CR  (%cr18, PT_IAOQ0(\regs))
 439         mtctl    %r0,   %cr18
 440         SAVE_CR  (%cr18, PT_IAOQ1(\regs))
 441
 442 #ifdef __LP64__
 443         /* cr11 (sar) is a funny one.  5 bits on PA1.1 and 6 bit on PA2.0
 444          * For PA2.0 mtsar or mtctl always write 6 bits, but mfctl only
 445          * reads 5 bits.  Use mfctl,w to read all six bits.  Otherwise
 446          * we lose the 6th bit on a save/restore over interrupt.
 447          */
 448         mfctl,w  %cr11, %r1
 449         STREG    %r1, PT_SAR (\regs)
 450 #else
 451         SAVE_CR  (%cr11, PT_SAR  (\regs))
 452 #endif
 453         SAVE_CR  (%cr19, PT_IIR  (\regs))
 454
 455         /*
 456          * Code immediately following this macro (in intr_save) relies
 457          * on r8 containing ipsw.
 458          */
 459         mfctl    %cr22, %r8
 460         STREG    %r8,   PT_PSW(\regs)
 461         .endm
 462
 463         .macro  rest_specials   regs
 464
 465         REST_SP  (%sr0, PT_SR0 (\regs))
 466         REST_SP  (%sr1, PT_SR1 (\regs))
 467         REST_SP  (%sr2, PT_SR2 (\regs))
 468         REST_SP  (%sr3, PT_SR3 (\regs))
 469         REST_SP  (%sr4, PT_SR4 (\regs))
 470         REST_SP  (%sr5, PT_SR5 (\regs))
 471         REST_SP  (%sr6, PT_SR6 (\regs))
 472         REST_SP  (%sr7, PT_SR7 (\regs))
 473
 474         REST_CR (%cr17, PT_IASQ0(\regs))
 475         REST_CR (%cr17, PT_IASQ1(\regs))
 476
 477         REST_CR (%cr18, PT_IAOQ0(\regs))
 478         REST_CR (%cr18, PT_IAOQ1(\regs))
 479
 480         REST_CR (%cr11, PT_SAR  (\regs))
 481
 482         REST_CR (%cr22, PT_PSW  (\regs))
 483         .endm
 484
 485
 486         /* First step to create a "relied upon translation"
 487          * See PA 2.0 Arch. page F-4 and F-5.
 488          *
 489          * The ssm was originally necessary due to a "PCxT bug".
 490          * But someone decided it needed to be added to the architecture
 491          * and this "feature" went into rev3 of PA-RISC 1.1 Arch Manual.
 492          * It's been carried forward into PA 2.0 Arch as well. :^(
 493          *
 494          * "ssm 0,%r0" is a NOP with side effects (prefetch barrier).
 495          * rsm/ssm prevents the ifetch unit from speculatively fetching
 496          * instructions past this line in the code stream.
 497          * PA 2.0 processor will single step all insn in the same QUAD (4 insn).
 498          */
 499         .macro  pcxt_ssm_bug
 500         rsm     PSW_SM_I,%r0
 501         nop     /* 1 */
 502         nop     /* 2 */
 503         nop     /* 3 */
 504         nop     /* 4 */
 505         nop     /* 5 */
 506         nop     /* 6 */
 507         nop     /* 7 */
 508         .endm
 509
 510 #endif /* __ASSEMBLY__ */
 511 #endif