1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 1999 Hewlett-Packard (Frank Rowand) 4 * Copyright (C) 1999 Philipp Rumpf <prumpf@tux.org> 5 * Copyright (C) 1999 SuSE GmbH 6 * Copyright (C) 2021 Helge Deller <deller@gmx.de> 7 */ 8 9 #ifndef _PARISC_ASSEMBLY_H 10 #define _PARISC_ASSEMBLY_H 11 12 #ifdef CONFIG_64BIT 13 #define RP_OFFSET 16 14 #define FRAME_SIZE 128 15 #define CALLEE_REG_FRAME_SIZE 144 16 #define REG_SZ 8 17 #define ASM_ULONG_INSN .dword 18 #else /* CONFIG_64BIT */ 19 #define RP_OFFSET 20 20 #define FRAME_SIZE 64 21 #define CALLEE_REG_FRAME_SIZE 128 22 #define REG_SZ 4 23 #define ASM_ULONG_INSN .word 24 #endif 25 26 /* Frame alignment for 32- and 64-bit */ 27 #define FRAME_ALIGN 64 28 29 #define CALLEE_FLOAT_FRAME_SIZE 80 30 #define CALLEE_SAVE_FRAME_SIZE (CALLEE_REG_FRAME_SIZE + CALLEE_FLOAT_FRAME_SIZE) 31 32 #ifdef CONFIG_PA20 33 #define LDCW ldcw,co 34 #define BL b,l 35 # ifdef CONFIG_64BIT 36 # define PA_ASM_LEVEL 2.0w 37 # else 38 # define PA_ASM_LEVEL 2.0 39 # endif 40 #else 41 #define LDCW ldcw 42 #define BL bl 43 #define PA_ASM_LEVEL 1.1 44 #endif 45 46 /* Privilege level field in the rightmost two bits of the IA queues */ 47 #define PRIV_USER 3 48 #define PRIV_KERNEL 0 49 50 /* Space register used inside kernel */ 51 #define SR_KERNEL 0 52 #define SR_TEMP1 1 53 #define SR_TEMP2 2 54 #define SR_USER 3 55 56 #ifdef __ASSEMBLY__ 57 58 #ifdef CONFIG_64BIT 59 #define LDREG ldd 60 #define STREG std 61 #define LDREGX ldd,s 62 #define LDREGM ldd,mb 63 #define STREGM std,ma 64 #define SHRREG shrd 65 #define SHLREG shld 66 #define ANDCM andcm,* 67 #define COND(x) * ## x 68 #else /* CONFIG_64BIT */ 69 #define LDREG ldw 70 #define STREG stw 71 #define LDREGX ldwx,s 72 #define LDREGM ldwm 73 #define STREGM stwm 74 #define SHRREG shr 75 #define SHLREG shlw 76 #define ANDCM andcm 77 #define COND(x) x 78 #endif 79 80 #ifdef CONFIG_64BIT 81 /* the 64-bit pa gnu assembler unfortunately defaults to .level 1.1 or 2.0 so 82 * work around that for now... */ 83 .level 2.0w 84 #endif 85 86 #include <asm/asm-offsets.h> 87 #include <asm/page.h> 88 #include <asm/types.h> 89 90 #include <asm/asmregs.h> 91 #include <asm/psw.h> 92 93 /* 94 * We provide two versions of each macro to convert from physical 95 * to virtual and vice versa. The "_r1" versions take one argument 96 * register, but trashes r1 to do the conversion. The other 97 * version takes two arguments: a src and destination register. 98 * However, the source and destination registers can not be 99 * the same register. 100 */ 101 102 .macro tophys grvirt, grphys 103 ldil L%(__PAGE_OFFSET), \grphys 104 sub \grvirt, \grphys, \grphys 105 .endm 106 107 .macro tovirt grphys, grvirt 108 ldil L%(__PAGE_OFFSET), \grvirt 109 add \grphys, \grvirt, \grvirt 110 .endm 111 112 .macro tophys_r1 gr 113 ldil L%(__PAGE_OFFSET), %r1 114 sub \gr, %r1, \gr 115 .endm 116 117 .macro tovirt_r1 gr 118 ldil L%(__PAGE_OFFSET), %r1 119 add \gr, %r1, \gr 120 .endm 121 122 .macro delay value 123 ldil L%\value, 1 124 ldo R%\value(1), 1 125 addib,UV,n -1,1,. 126 addib,NUV,n -1,1,.+8 127 nop 128 .endm 129 130 .macro debug value 131 .endm 132 133 .macro shlw r, sa, t 134 zdep \r, 31-(\sa), 32-(\sa), \t 135 .endm 136 137 /* And the PA 2.0W shift left */ 138 .macro shld r, sa, t 139 depd,z \r, 63-(\sa), 64-(\sa), \t 140 .endm 141 142 /* Shift Right for 32-bit. Clobbers upper 32-bit on PA2.0. */ 143 .macro shr r, sa, t 144 extru \r, 31-(\sa), 32-(\sa), \t 145 .endm 146 147 /* pa20w version of shift right */ 148 .macro shrd r, sa, t 149 extrd,u \r, 63-(\sa), 64-(\sa), \t 150 .endm 151 152 /* Extract unsigned for 32- and 64-bit 153 * The extru instruction leaves the most significant 32 bits of the 154 * target register in an undefined state on PA 2.0 systems. */ 155 .macro extru_safe r, p, len, t 156 #ifdef CONFIG_64BIT 157 extrd,u \r, 32+(\p), \len, \t 158 #else 159 extru \r, \p, \len, \t 160 #endif 161 .endm 162 163 /* The depi instruction leaves the most significant 32 bits of the 164 * target register in an undefined state on PA 2.0 systems. */ 165 .macro depi_safe i, p, len, t 166 #ifdef CONFIG_64BIT 167 depdi \i, 32+(\p), \len, \t 168 #else 169 depi \i, \p, \len, \t 170 #endif 171 .endm 172 173 /* The depw instruction leaves the most significant 32 bits of the 174 * target register in an undefined state on PA 2.0 systems. */ 175 .macro dep_safe i, p, len, t 176 #ifdef CONFIG_64BIT 177 depd \i, 32+(\p), \len, \t 178 #else 179 depw \i, \p, \len, \t 180 #endif 181 .endm 182 183 /* load 32-bit 'value' into 'reg' compensating for the ldil 184 * sign-extension when running in wide mode. 185 * WARNING!! neither 'value' nor 'reg' can be expressions 186 * containing '.'!!!! */ 187 .macro load32 value, reg 188 ldil L%\value, \reg 189 ldo R%\value(\reg), \reg 190 .endm 191 192 .macro loadgp 193 #ifdef CONFIG_64BIT 194 ldil L%__gp, %r27 195 ldo R%__gp(%r27), %r27 196 #else 197 ldil L%$global$, %r27 198 ldo R%$global$(%r27), %r27 199 #endif 200 .endm 201 202 #define SAVE_SP(r, where) mfsp r, %r1 ! STREG %r1, where 203 #define REST_SP(r, where) LDREG where, %r1 ! mtsp %r1, r 204 #define SAVE_CR(r, where) mfctl r, %r1 ! STREG %r1, where 205 #define REST_CR(r, where) LDREG where, %r1 ! mtctl %r1, r 206 207 .macro save_general regs 208 STREG %r1, PT_GR1 (\regs) 209 STREG %r2, PT_GR2 (\regs) 210 STREG %r3, PT_GR3 (\regs) 211 STREG %r4, PT_GR4 (\regs) 212 STREG %r5, PT_GR5 (\regs) 213 STREG %r6, PT_GR6 (\regs) 214 STREG %r7, PT_GR7 (\regs) 215 STREG %r8, PT_GR8 (\regs) 216 STREG %r9, PT_GR9 (\regs) 217 STREG %r10, PT_GR10(\regs) 218 STREG %r11, PT_GR11(\regs) 219 STREG %r12, PT_GR12(\regs) 220 STREG %r13, PT_GR13(\regs) 221 STREG %r14, PT_GR14(\regs) 222 STREG %r15, PT_GR15(\regs) 223 STREG %r16, PT_GR16(\regs) 224 STREG %r17, PT_GR17(\regs) 225 STREG %r18, PT_GR18(\regs) 226 STREG %r19, PT_GR19(\regs) 227 STREG %r20, PT_GR20(\regs) 228 STREG %r21, PT_GR21(\regs) 229 STREG %r22, PT_GR22(\regs) 230 STREG %r23, PT_GR23(\regs) 231 STREG %r24, PT_GR24(\regs) 232 STREG %r25, PT_GR25(\regs) 233 /* r26 is saved in get_stack and used to preserve a value across virt_map */ 234 STREG %r27, PT_GR27(\regs) 235 STREG %r28, PT_GR28(\regs) 236 /* r29 is saved in get_stack and used to point to saved registers */ 237 /* r30 stack pointer saved in get_stack */ 238 STREG %r31, PT_GR31(\regs) 239 .endm 240 241 .macro rest_general regs 242 /* r1 used as a temp in rest_stack and is restored there */ 243 LDREG PT_GR2 (\regs), %r2 244 LDREG PT_GR3 (\regs), %r3 245 LDREG PT_GR4 (\regs), %r4 246 LDREG PT_GR5 (\regs), %r5 247 LDREG PT_GR6 (\regs), %r6 248 LDREG PT_GR7 (\regs), %r7 249 LDREG PT_GR8 (\regs), %r8 250 LDREG PT_GR9 (\regs), %r9 251 LDREG PT_GR10(\regs), %r10 252 LDREG PT_GR11(\regs), %r11 253 LDREG PT_GR12(\regs), %r12 254 LDREG PT_GR13(\regs), %r13 255 LDREG PT_GR14(\regs), %r14 256 LDREG PT_GR15(\regs), %r15 257 LDREG PT_GR16(\regs), %r16 258 LDREG PT_GR17(\regs), %r17 259 LDREG PT_GR18(\regs), %r18 260 LDREG PT_GR19(\regs), %r19 261 LDREG PT_GR20(\regs), %r20 262 LDREG PT_GR21(\regs), %r21 263 LDREG PT_GR22(\regs), %r22 264 LDREG PT_GR23(\regs), %r23 265 LDREG PT_GR24(\regs), %r24 266 LDREG PT_GR25(\regs), %r25 267 LDREG PT_GR26(\regs), %r26 268 LDREG PT_GR27(\regs), %r27 269 LDREG PT_GR28(\regs), %r28 270 /* r29 points to register save area, and is restored in rest_stack */ 271 /* r30 stack pointer restored in rest_stack */ 272 LDREG PT_GR31(\regs), %r31 273 .endm 274 275 .macro save_fp regs 276 fstd,ma %fr0, 8(\regs) 277 fstd,ma %fr1, 8(\regs) 278 fstd,ma %fr2, 8(\regs) 279 fstd,ma %fr3, 8(\regs) 280 fstd,ma %fr4, 8(\regs) 281 fstd,ma %fr5, 8(\regs) 282 fstd,ma %fr6, 8(\regs) 283 fstd,ma %fr7, 8(\regs) 284 fstd,ma %fr8, 8(\regs) 285 fstd,ma %fr9, 8(\regs) 286 fstd,ma %fr10, 8(\regs) 287 fstd,ma %fr11, 8(\regs) 288 fstd,ma %fr12, 8(\regs) 289 fstd,ma %fr13, 8(\regs) 290 fstd,ma %fr14, 8(\regs) 291 fstd,ma %fr15, 8(\regs) 292 fstd,ma %fr16, 8(\regs) 293 fstd,ma %fr17, 8(\regs) 294 fstd,ma %fr18, 8(\regs) 295 fstd,ma %fr19, 8(\regs) 296 fstd,ma %fr20, 8(\regs) 297 fstd,ma %fr21, 8(\regs) 298 fstd,ma %fr22, 8(\regs) 299 fstd,ma %fr23, 8(\regs) 300 fstd,ma %fr24, 8(\regs) 301 fstd,ma %fr25, 8(\regs) 302 fstd,ma %fr26, 8(\regs) 303 fstd,ma %fr27, 8(\regs) 304 fstd,ma %fr28, 8(\regs) 305 fstd,ma %fr29, 8(\regs) 306 fstd,ma %fr30, 8(\regs) 307 fstd %fr31, 0(\regs) 308 .endm 309 310 .macro rest_fp regs 311 fldd 0(\regs), %fr31 312 fldd,mb -8(\regs), %fr30 313 fldd,mb -8(\regs), %fr29 314 fldd,mb -8(\regs), %fr28 315 fldd,mb -8(\regs), %fr27 316 fldd,mb -8(\regs), %fr26 317 fldd,mb -8(\regs), %fr25 318 fldd,mb -8(\regs), %fr24 319 fldd,mb -8(\regs), %fr23 320 fldd,mb -8(\regs), %fr22 321 fldd,mb -8(\regs), %fr21 322 fldd,mb -8(\regs), %fr20 323 fldd,mb -8(\regs), %fr19 324 fldd,mb -8(\regs), %fr18 325 fldd,mb -8(\regs), %fr17 326 fldd,mb -8(\regs), %fr16 327 fldd,mb -8(\regs), %fr15 328 fldd,mb -8(\regs), %fr14 329 fldd,mb -8(\regs), %fr13 330 fldd,mb -8(\regs), %fr12 331 fldd,mb -8(\regs), %fr11 332 fldd,mb -8(\regs), %fr10 333 fldd,mb -8(\regs), %fr9 334 fldd,mb -8(\regs), %fr8 335 fldd,mb -8(\regs), %fr7 336 fldd,mb -8(\regs), %fr6 337 fldd,mb -8(\regs), %fr5 338 fldd,mb -8(\regs), %fr4 339 fldd,mb -8(\regs), %fr3 340 fldd,mb -8(\regs), %fr2 341 fldd,mb -8(\regs), %fr1 342 fldd,mb -8(\regs), %fr0 343 .endm 344 345 .macro callee_save_float 346 fstd,ma %fr12, 8(%r30) 347 fstd,ma %fr13, 8(%r30) 348 fstd,ma %fr14, 8(%r30) 349 fstd,ma %fr15, 8(%r30) 350 fstd,ma %fr16, 8(%r30) 351 fstd,ma %fr17, 8(%r30) 352 fstd,ma %fr18, 8(%r30) 353 fstd,ma %fr19, 8(%r30) 354 fstd,ma %fr20, 8(%r30) 355 fstd,ma %fr21, 8(%r30) 356 .endm 357 358 .macro callee_rest_float 359 fldd,mb -8(%r30), %fr21 360 fldd,mb -8(%r30), %fr20 361 fldd,mb -8(%r30), %fr19 362 fldd,mb -8(%r30), %fr18 363 fldd,mb -8(%r30), %fr17 364 fldd,mb -8(%r30), %fr16 365 fldd,mb -8(%r30), %fr15 366 fldd,mb -8(%r30), %fr14 367 fldd,mb -8(%r30), %fr13 368 fldd,mb -8(%r30), %fr12 369 .endm 370 371 #ifdef CONFIG_64BIT 372 .macro callee_save 373 std,ma %r3, CALLEE_REG_FRAME_SIZE(%r30) 374 mfctl %cr27, %r3 375 std %r4, -136(%r30) 376 std %r5, -128(%r30) 377 std %r6, -120(%r30) 378 std %r7, -112(%r30) 379 std %r8, -104(%r30) 380 std %r9, -96(%r30) 381 std %r10, -88(%r30) 382 std %r11, -80(%r30) 383 std %r12, -72(%r30) 384 std %r13, -64(%r30) 385 std %r14, -56(%r30) 386 std %r15, -48(%r30) 387 std %r16, -40(%r30) 388 std %r17, -32(%r30) 389 std %r18, -24(%r30) 390 std %r3, -16(%r30) 391 .endm 392 393 .macro callee_rest 394 ldd -16(%r30), %r3 395 ldd -24(%r30), %r18 396 ldd -32(%r30), %r17 397 ldd -40(%r30), %r16 398 ldd -48(%r30), %r15 399 ldd -56(%r30), %r14 400 ldd -64(%r30), %r13 401 ldd -72(%r30), %r12 402 ldd -80(%r30), %r11 403 ldd -88(%r30), %r10 404 ldd -96(%r30), %r9 405 ldd -104(%r30), %r8 406 ldd -112(%r30), %r7 407 ldd -120(%r30), %r6 408 ldd -128(%r30), %r5 409 ldd -136(%r30), %r4 410 mtctl %r3, %cr27 411 ldd,mb -CALLEE_REG_FRAME_SIZE(%r30), %r3 412 .endm 413 414 #else /* ! CONFIG_64BIT */ 415 416 .macro callee_save 417 stw,ma %r3, CALLEE_REG_FRAME_SIZE(%r30) 418 mfctl %cr27, %r3 419 stw %r4, -124(%r30) 420 stw %r5, -120(%r30) 421 stw %r6, -116(%r30) 422 stw %r7, -112(%r30) 423 stw %r8, -108(%r30) 424 stw %r9, -104(%r30) 425 stw %r10, -100(%r30) 426 stw %r11, -96(%r30) 427 stw %r12, -92(%r30) 428 stw %r13, -88(%r30) 429 stw %r14, -84(%r30) 430 stw %r15, -80(%r30) 431 stw %r16, -76(%r30) 432 stw %r17, -72(%r30) 433 stw %r18, -68(%r30) 434 stw %r3, -64(%r30) 435 .endm 436 437 .macro callee_rest 438 ldw -64(%r30), %r3 439 ldw -68(%r30), %r18 440 ldw -72(%r30), %r17 441 ldw -76(%r30), %r16 442 ldw -80(%r30), %r15 443 ldw -84(%r30), %r14 444 ldw -88(%r30), %r13 445 ldw -92(%r30), %r12 446 ldw -96(%r30), %r11 447 ldw -100(%r30), %r10 448 ldw -104(%r30), %r9 449 ldw -108(%r30), %r8 450 ldw -112(%r30), %r7 451 ldw -116(%r30), %r6 452 ldw -120(%r30), %r5 453 ldw -124(%r30), %r4 454 mtctl %r3, %cr27 455 ldw,mb -CALLEE_REG_FRAME_SIZE(%r30), %r3 456 .endm 457 #endif /* ! CONFIG_64BIT */ 458 459 .macro save_specials regs 460 461 SAVE_SP (%sr0, PT_SR0 (\regs)) 462 SAVE_SP (%sr1, PT_SR1 (\regs)) 463 SAVE_SP (%sr2, PT_SR2 (\regs)) 464 SAVE_SP (%sr3, PT_SR3 (\regs)) 465 SAVE_SP (%sr4, PT_SR4 (\regs)) 466 SAVE_SP (%sr5, PT_SR5 (\regs)) 467 SAVE_SP (%sr6, PT_SR6 (\regs)) 468 469 SAVE_CR (%cr17, PT_IASQ0(\regs)) 470 mtctl %r0, %cr17 471 SAVE_CR (%cr17, PT_IASQ1(\regs)) 472 473 SAVE_CR (%cr18, PT_IAOQ0(\regs)) 474 mtctl %r0, %cr18 475 SAVE_CR (%cr18, PT_IAOQ1(\regs)) 476 477 #ifdef CONFIG_64BIT 478 /* cr11 (sar) is a funny one. 5 bits on PA1.1 and 6 bit on PA2.0 479 * For PA2.0 mtsar or mtctl always write 6 bits, but mfctl only 480 * reads 5 bits. Use mfctl,w to read all six bits. Otherwise 481 * we lose the 6th bit on a save/restore over interrupt. 482 */ 483 mfctl,w %cr11, %r1 484 STREG %r1, PT_SAR (\regs) 485 #else 486 SAVE_CR (%cr11, PT_SAR (\regs)) 487 #endif 488 SAVE_CR (%cr19, PT_IIR (\regs)) 489 490 /* 491 * Code immediately following this macro (in intr_save) relies 492 * on r8 containing ipsw. 493 */ 494 mfctl %cr22, %r8 495 STREG %r8, PT_PSW(\regs) 496 .endm 497 498 .macro rest_specials regs 499 500 REST_SP (%sr0, PT_SR0 (\regs)) 501 REST_SP (%sr1, PT_SR1 (\regs)) 502 REST_SP (%sr2, PT_SR2 (\regs)) 503 REST_SP (%sr3, PT_SR3 (\regs)) 504 REST_SP (%sr4, PT_SR4 (\regs)) 505 REST_SP (%sr5, PT_SR5 (\regs)) 506 REST_SP (%sr6, PT_SR6 (\regs)) 507 REST_SP (%sr7, PT_SR7 (\regs)) 508 509 REST_CR (%cr17, PT_IASQ0(\regs)) 510 REST_CR (%cr17, PT_IASQ1(\regs)) 511 512 REST_CR (%cr18, PT_IAOQ0(\regs)) 513 REST_CR (%cr18, PT_IAOQ1(\regs)) 514 515 REST_CR (%cr11, PT_SAR (\regs)) 516 517 REST_CR (%cr22, PT_PSW (\regs)) 518 .endm 519 520 521 /* First step to create a "relied upon translation" 522 * See PA 2.0 Arch. page F-4 and F-5. 523 * 524 * The ssm was originally necessary due to a "PCxT bug". 525 * But someone decided it needed to be added to the architecture 526 * and this "feature" went into rev3 of PA-RISC 1.1 Arch Manual. 527 * It's been carried forward into PA 2.0 Arch as well. :^( 528 * 529 * "ssm 0,%r0" is a NOP with side effects (prefetch barrier). 530 * rsm/ssm prevents the ifetch unit from speculatively fetching 531 * instructions past this line in the code stream. 532 * PA 2.0 processor will single step all insn in the same QUAD (4 insn). 533 */ 534 .macro pcxt_ssm_bug 535 rsm PSW_SM_I,%r0 536 nop /* 1 */ 537 nop /* 2 */ 538 nop /* 3 */ 539 nop /* 4 */ 540 nop /* 5 */ 541 nop /* 6 */ 542 nop /* 7 */ 543 .endm 544 545 /* Switch to virtual mapping, trashing only %r1 */ 546 .macro virt_map 547 /* pcxt_ssm_bug */ 548 rsm PSW_SM_I, %r0 /* barrier for "Relied upon Translation */ 549 mtsp %r0, %sr4 550 mtsp %r0, %sr5 551 mtsp %r0, %sr6 552 tovirt_r1 %r29 553 load32 KERNEL_PSW, %r1 554 555 rsm PSW_SM_QUIET,%r0 /* second "heavy weight" ctl op */ 556 mtctl %r0, %cr17 /* Clear IIASQ tail */ 557 mtctl %r0, %cr17 /* Clear IIASQ head */ 558 mtctl %r1, %ipsw 559 load32 4f, %r1 560 mtctl %r1, %cr18 /* Set IIAOQ tail */ 561 ldo 4(%r1), %r1 562 mtctl %r1, %cr18 /* Set IIAOQ head */ 563 rfir 564 nop 565 4: 566 .endm 567 568 569 /* 570 * ASM_EXCEPTIONTABLE_ENTRY 571 * 572 * Creates an exception table entry. 573 * Do not convert to a assembler macro. This won't work. 574 */ 575 #define ASM_EXCEPTIONTABLE_ENTRY(fault_addr, except_addr) \ 576 .section __ex_table,"aw" ! \ 577 .word (fault_addr - .), (except_addr - .) ! \ 578 .previous 579 580 581 #endif /* __ASSEMBLY__ */ 582 #endif 583