1/* NG2memcpy.S: Niagara-2 optimized memcpy. 2 * 3 * Copyright (C) 2007 David S. Miller (davem@davemloft.net) 4 */ 5 6#ifdef __KERNEL__ 7#include <asm/visasm.h> 8#include <asm/asi.h> 9#define GLOBAL_SPARE %g7 10#else 11#define ASI_PNF 0x82 12#define ASI_BLK_P 0xf0 13#define ASI_BLK_INIT_QUAD_LDD_P 0xe2 14#define FPRS_FEF 0x04 15#ifdef MEMCPY_DEBUG 16#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \ 17 clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0; 18#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs 19#else 20#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs 21#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs 22#endif 23#define GLOBAL_SPARE %g5 24#endif 25 26#ifndef STORE_ASI 27#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA 28#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P 29#else 30#define STORE_ASI 0x80 /* ASI_P */ 31#endif 32#endif 33 34#ifndef EX_LD 35#define EX_LD(x) x 36#endif 37 38#ifndef EX_ST 39#define EX_ST(x) x 40#endif 41 42#ifndef EX_RETVAL 43#define EX_RETVAL(x) x 44#endif 45 46#ifndef LOAD 47#define LOAD(type,addr,dest) type [addr], dest 48#endif 49 50#ifndef LOAD_BLK 51#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_P, dest 52#endif 53 54#ifndef STORE 55#ifndef MEMCPY_DEBUG 56#define STORE(type,src,addr) type src, [addr] 57#else 58#define STORE(type,src,addr) type##a src, [addr] 0x80 59#endif 60#endif 61 62#ifndef STORE_BLK 63#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P 64#endif 65 66#ifndef STORE_INIT 67#define STORE_INIT(src,addr) stxa src, [addr] STORE_ASI 68#endif 69 70#ifndef FUNC_NAME 71#define FUNC_NAME NG2memcpy 72#endif 73 74#ifndef PREAMBLE 75#define PREAMBLE 76#endif 77 78#ifndef XCC 79#define XCC xcc 80#endif 81 82#define FREG_FROB(x0, x1, x2, x3, x4, x5, x6, x7, x8) \ 83 faligndata %x0, %x1, %f0; \ 84 faligndata %x1, %x2, %f2; \ 85 faligndata %x2, %x3, %f4; \ 86 faligndata %x3, %x4, %f6; \ 87 faligndata %x4, %x5, %f8; \ 88 faligndata %x5, %x6, %f10; \ 89 faligndata %x6, %x7, %f12; \ 90 faligndata %x7, %x8, %f14; 91 92#define FREG_MOVE_1(x0) \ 93 fmovd %x0, %f0; 94#define FREG_MOVE_2(x0, x1) \ 95 fmovd %x0, %f0; \ 96 fmovd %x1, %f2; 97#define FREG_MOVE_3(x0, x1, x2) \ 98 fmovd %x0, %f0; \ 99 fmovd %x1, %f2; \ 100 fmovd %x2, %f4; 101#define FREG_MOVE_4(x0, x1, x2, x3) \ 102 fmovd %x0, %f0; \ 103 fmovd %x1, %f2; \ 104 fmovd %x2, %f4; \ 105 fmovd %x3, %f6; 106#define FREG_MOVE_5(x0, x1, x2, x3, x4) \ 107 fmovd %x0, %f0; \ 108 fmovd %x1, %f2; \ 109 fmovd %x2, %f4; \ 110 fmovd %x3, %f6; \ 111 fmovd %x4, %f8; 112#define FREG_MOVE_6(x0, x1, x2, x3, x4, x5) \ 113 fmovd %x0, %f0; \ 114 fmovd %x1, %f2; \ 115 fmovd %x2, %f4; \ 116 fmovd %x3, %f6; \ 117 fmovd %x4, %f8; \ 118 fmovd %x5, %f10; 119#define FREG_MOVE_7(x0, x1, x2, x3, x4, x5, x6) \ 120 fmovd %x0, %f0; \ 121 fmovd %x1, %f2; \ 122 fmovd %x2, %f4; \ 123 fmovd %x3, %f6; \ 124 fmovd %x4, %f8; \ 125 fmovd %x5, %f10; \ 126 fmovd %x6, %f12; 127#define FREG_MOVE_8(x0, x1, x2, x3, x4, x5, x6, x7) \ 128 fmovd %x0, %f0; \ 129 fmovd %x1, %f2; \ 130 fmovd %x2, %f4; \ 131 fmovd %x3, %f6; \ 132 fmovd %x4, %f8; \ 133 fmovd %x5, %f10; \ 134 fmovd %x6, %f12; \ 135 fmovd %x7, %f14; 136#define FREG_LOAD_1(base, x0) \ 137 EX_LD(LOAD(ldd, base + 0x00, %x0)) 138#define FREG_LOAD_2(base, x0, x1) \ 139 EX_LD(LOAD(ldd, base + 0x00, %x0)); \ 140 EX_LD(LOAD(ldd, base + 0x08, %x1)); 141#define FREG_LOAD_3(base, x0, x1, x2) \ 142 EX_LD(LOAD(ldd, base + 0x00, %x0)); \ 143 EX_LD(LOAD(ldd, base + 0x08, %x1)); \ 144 EX_LD(LOAD(ldd, base + 0x10, %x2)); 145#define FREG_LOAD_4(base, x0, x1, x2, x3) \ 146 EX_LD(LOAD(ldd, base + 0x00, %x0)); \ 147 EX_LD(LOAD(ldd, base + 0x08, %x1)); \ 148 EX_LD(LOAD(ldd, base + 0x10, %x2)); \ 149 EX_LD(LOAD(ldd, base + 0x18, %x3)); 150#define FREG_LOAD_5(base, x0, x1, x2, x3, x4) \ 151 EX_LD(LOAD(ldd, base + 0x00, %x0)); \ 152 EX_LD(LOAD(ldd, base + 0x08, %x1)); \ 153 EX_LD(LOAD(ldd, base + 0x10, %x2)); \ 154 EX_LD(LOAD(ldd, base + 0x18, %x3)); \ 155 EX_LD(LOAD(ldd, base + 0x20, %x4)); 156#define FREG_LOAD_6(base, x0, x1, x2, x3, x4, x5) \ 157 EX_LD(LOAD(ldd, base + 0x00, %x0)); \ 158 EX_LD(LOAD(ldd, base + 0x08, %x1)); \ 159 EX_LD(LOAD(ldd, base + 0x10, %x2)); \ 160 EX_LD(LOAD(ldd, base + 0x18, %x3)); \ 161 EX_LD(LOAD(ldd, base + 0x20, %x4)); \ 162 EX_LD(LOAD(ldd, base + 0x28, %x5)); 163#define FREG_LOAD_7(base, x0, x1, x2, x3, x4, x5, x6) \ 164 EX_LD(LOAD(ldd, base + 0x00, %x0)); \ 165 EX_LD(LOAD(ldd, base + 0x08, %x1)); \ 166 EX_LD(LOAD(ldd, base + 0x10, %x2)); \ 167 EX_LD(LOAD(ldd, base + 0x18, %x3)); \ 168 EX_LD(LOAD(ldd, base + 0x20, %x4)); \ 169 EX_LD(LOAD(ldd, base + 0x28, %x5)); \ 170 EX_LD(LOAD(ldd, base + 0x30, %x6)); 171 172 .register %g2,#scratch 173 .register %g3,#scratch 174 175 .text 176 .align 64 177 178 .globl FUNC_NAME 179 .type FUNC_NAME,#function 180FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */ 181 srlx %o2, 31, %g2 182 cmp %g2, 0 183 tne %xcc, 5 184 PREAMBLE 185 mov %o0, GLOBAL_SPARE 186 cmp %o2, 0 187 be,pn %XCC, 85f 188 or %o0, %o1, %o3 189 cmp %o2, 16 190 blu,a,pn %XCC, 80f 191 or %o3, %o2, %o3 192 193 /* 2 blocks (128 bytes) is the minimum we can do the block 194 * copy with. We need to ensure that we'll iterate at least 195 * once in the block copy loop. At worst we'll need to align 196 * the destination to a 64-byte boundary which can chew up 197 * to (64 - 1) bytes from the length before we perform the 198 * block copy loop. 199 * 200 * However, the cut-off point, performance wise, is around 201 * 4 64-byte blocks. 202 */ 203 cmp %o2, (4 * 64) 204 blu,pt %XCC, 75f 205 andcc %o3, 0x7, %g0 206 207 /* %o0: dst 208 * %o1: src 209 * %o2: len (known to be >= 128) 210 * 211 * The block copy loops can use %o4, %g2, %g3 as 212 * temporaries while copying the data. %o5 must 213 * be preserved between VISEntryHalf and VISExitHalf 214 */ 215 216 LOAD(prefetch, %o1 + 0x000, #one_read) 217 LOAD(prefetch, %o1 + 0x040, #one_read) 218 LOAD(prefetch, %o1 + 0x080, #one_read) 219 220 /* Align destination on 64-byte boundary. */ 221 andcc %o0, (64 - 1), %o4 222 be,pt %XCC, 2f 223 sub %o4, 64, %o4 224 sub %g0, %o4, %o4 ! bytes to align dst 225 sub %o2, %o4, %o2 2261: subcc %o4, 1, %o4 227 EX_LD(LOAD(ldub, %o1, %g1)) 228 EX_ST(STORE(stb, %g1, %o0)) 229 add %o1, 1, %o1 230 bne,pt %XCC, 1b 231 add %o0, 1, %o0 232 2332: 234 /* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve 235 * o5 from here until we hit VISExitHalf. 236 */ 237 VISEntryHalf 238 239 alignaddr %o1, %g0, %g0 240 241 add %o1, (64 - 1), %o4 242 andn %o4, (64 - 1), %o4 243 andn %o2, (64 - 1), %g1 244 sub %o2, %g1, %o2 245 246 and %o1, (64 - 1), %g2 247 add %o1, %g1, %o1 248 sub %o0, %o4, %g3 249 brz,pt %g2, 190f 250 cmp %g2, 32 251 blu,a 5f 252 cmp %g2, 16 253 cmp %g2, 48 254 blu,a 4f 255 cmp %g2, 40 256 cmp %g2, 56 257 blu 170f 258 nop 259 ba,a,pt %xcc, 180f 260 2614: /* 32 <= low bits < 48 */ 262 blu 150f 263 nop 264 ba,a,pt %xcc, 160f 2655: /* 0 < low bits < 32 */ 266 blu,a 6f 267 cmp %g2, 8 268 cmp %g2, 24 269 blu 130f 270 nop 271 ba,a,pt %xcc, 140f 2726: /* 0 < low bits < 16 */ 273 bgeu 120f 274 nop 275 /* fall through for 0 < low bits < 8 */ 276110: sub %o4, 64, %g2 277 EX_LD(LOAD_BLK(%g2, %f0)) 2781: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 279 EX_LD(LOAD_BLK(%o4, %f16)) 280 FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f14, f16) 281 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 282 FREG_MOVE_8(f16, f18, f20, f22, f24, f26, f28, f30) 283 subcc %g1, 64, %g1 284 add %o4, 64, %o4 285 bne,pt %xcc, 1b 286 LOAD(prefetch, %o4 + 64, #one_read) 287 ba,pt %xcc, 195f 288 nop 289 290120: sub %o4, 56, %g2 291 FREG_LOAD_7(%g2, f0, f2, f4, f6, f8, f10, f12) 2921: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 293 EX_LD(LOAD_BLK(%o4, %f16)) 294 FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f16, f18) 295 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 296 FREG_MOVE_7(f18, f20, f22, f24, f26, f28, f30) 297 subcc %g1, 64, %g1 298 add %o4, 64, %o4 299 bne,pt %xcc, 1b 300 LOAD(prefetch, %o4 + 64, #one_read) 301 ba,pt %xcc, 195f 302 nop 303 304130: sub %o4, 48, %g2 305 FREG_LOAD_6(%g2, f0, f2, f4, f6, f8, f10) 3061: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 307 EX_LD(LOAD_BLK(%o4, %f16)) 308 FREG_FROB(f0, f2, f4, f6, f8, f10, f16, f18, f20) 309 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 310 FREG_MOVE_6(f20, f22, f24, f26, f28, f30) 311 subcc %g1, 64, %g1 312 add %o4, 64, %o4 313 bne,pt %xcc, 1b 314 LOAD(prefetch, %o4 + 64, #one_read) 315 ba,pt %xcc, 195f 316 nop 317 318140: sub %o4, 40, %g2 319 FREG_LOAD_5(%g2, f0, f2, f4, f6, f8) 3201: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 321 EX_LD(LOAD_BLK(%o4, %f16)) 322 FREG_FROB(f0, f2, f4, f6, f8, f16, f18, f20, f22) 323 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 324 FREG_MOVE_5(f22, f24, f26, f28, f30) 325 subcc %g1, 64, %g1 326 add %o4, 64, %o4 327 bne,pt %xcc, 1b 328 LOAD(prefetch, %o4 + 64, #one_read) 329 ba,pt %xcc, 195f 330 nop 331 332150: sub %o4, 32, %g2 333 FREG_LOAD_4(%g2, f0, f2, f4, f6) 3341: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 335 EX_LD(LOAD_BLK(%o4, %f16)) 336 FREG_FROB(f0, f2, f4, f6, f16, f18, f20, f22, f24) 337 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 338 FREG_MOVE_4(f24, f26, f28, f30) 339 subcc %g1, 64, %g1 340 add %o4, 64, %o4 341 bne,pt %xcc, 1b 342 LOAD(prefetch, %o4 + 64, #one_read) 343 ba,pt %xcc, 195f 344 nop 345 346160: sub %o4, 24, %g2 347 FREG_LOAD_3(%g2, f0, f2, f4) 3481: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 349 EX_LD(LOAD_BLK(%o4, %f16)) 350 FREG_FROB(f0, f2, f4, f16, f18, f20, f22, f24, f26) 351 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 352 FREG_MOVE_3(f26, f28, f30) 353 subcc %g1, 64, %g1 354 add %o4, 64, %o4 355 bne,pt %xcc, 1b 356 LOAD(prefetch, %o4 + 64, #one_read) 357 ba,pt %xcc, 195f 358 nop 359 360170: sub %o4, 16, %g2 361 FREG_LOAD_2(%g2, f0, f2) 3621: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 363 EX_LD(LOAD_BLK(%o4, %f16)) 364 FREG_FROB(f0, f2, f16, f18, f20, f22, f24, f26, f28) 365 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 366 FREG_MOVE_2(f28, f30) 367 subcc %g1, 64, %g1 368 add %o4, 64, %o4 369 bne,pt %xcc, 1b 370 LOAD(prefetch, %o4 + 64, #one_read) 371 ba,pt %xcc, 195f 372 nop 373 374180: sub %o4, 8, %g2 375 FREG_LOAD_1(%g2, f0) 3761: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 377 EX_LD(LOAD_BLK(%o4, %f16)) 378 FREG_FROB(f0, f16, f18, f20, f22, f24, f26, f28, f30) 379 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 380 FREG_MOVE_1(f30) 381 subcc %g1, 64, %g1 382 add %o4, 64, %o4 383 bne,pt %xcc, 1b 384 LOAD(prefetch, %o4 + 64, #one_read) 385 ba,pt %xcc, 195f 386 nop 387 388190: 3891: EX_ST(STORE_INIT(%g0, %o4 + %g3)) 390 subcc %g1, 64, %g1 391 EX_LD(LOAD_BLK(%o4, %f0)) 392 EX_ST(STORE_BLK(%f0, %o4 + %g3)) 393 add %o4, 64, %o4 394 bne,pt %xcc, 1b 395 LOAD(prefetch, %o4 + 64, #one_read) 396 397195: 398 add %o4, %g3, %o0 399 membar #Sync 400 401 VISExitHalf 402 403 /* %o2 contains any final bytes still needed to be copied 404 * over. If anything is left, we copy it one byte at a time. 405 */ 406 brz,pt %o2, 85f 407 sub %o0, %o1, %o3 408 ba,a,pt %XCC, 90f 409 410 .align 64 41175: /* 16 < len <= 64 */ 412 bne,pn %XCC, 75f 413 sub %o0, %o1, %o3 414 41572: 416 andn %o2, 0xf, %o4 417 and %o2, 0xf, %o2 4181: subcc %o4, 0x10, %o4 419 EX_LD(LOAD(ldx, %o1, %o5)) 420 add %o1, 0x08, %o1 421 EX_LD(LOAD(ldx, %o1, %g1)) 422 sub %o1, 0x08, %o1 423 EX_ST(STORE(stx, %o5, %o1 + %o3)) 424 add %o1, 0x8, %o1 425 EX_ST(STORE(stx, %g1, %o1 + %o3)) 426 bgu,pt %XCC, 1b 427 add %o1, 0x8, %o1 42873: andcc %o2, 0x8, %g0 429 be,pt %XCC, 1f 430 nop 431 sub %o2, 0x8, %o2 432 EX_LD(LOAD(ldx, %o1, %o5)) 433 EX_ST(STORE(stx, %o5, %o1 + %o3)) 434 add %o1, 0x8, %o1 4351: andcc %o2, 0x4, %g0 436 be,pt %XCC, 1f 437 nop 438 sub %o2, 0x4, %o2 439 EX_LD(LOAD(lduw, %o1, %o5)) 440 EX_ST(STORE(stw, %o5, %o1 + %o3)) 441 add %o1, 0x4, %o1 4421: cmp %o2, 0 443 be,pt %XCC, 85f 444 nop 445 ba,pt %xcc, 90f 446 nop 447 44875: 449 andcc %o0, 0x7, %g1 450 sub %g1, 0x8, %g1 451 be,pn %icc, 2f 452 sub %g0, %g1, %g1 453 sub %o2, %g1, %o2 454 4551: subcc %g1, 1, %g1 456 EX_LD(LOAD(ldub, %o1, %o5)) 457 EX_ST(STORE(stb, %o5, %o1 + %o3)) 458 bgu,pt %icc, 1b 459 add %o1, 1, %o1 460 4612: add %o1, %o3, %o0 462 andcc %o1, 0x7, %g1 463 bne,pt %icc, 8f 464 sll %g1, 3, %g1 465 466 cmp %o2, 16 467 bgeu,pt %icc, 72b 468 nop 469 ba,a,pt %xcc, 73b 470 4718: mov 64, %o3 472 andn %o1, 0x7, %o1 473 EX_LD(LOAD(ldx, %o1, %g2)) 474 sub %o3, %g1, %o3 475 andn %o2, 0x7, %o4 476 sllx %g2, %g1, %g2 4771: add %o1, 0x8, %o1 478 EX_LD(LOAD(ldx, %o1, %g3)) 479 subcc %o4, 0x8, %o4 480 srlx %g3, %o3, %o5 481 or %o5, %g2, %o5 482 EX_ST(STORE(stx, %o5, %o0)) 483 add %o0, 0x8, %o0 484 bgu,pt %icc, 1b 485 sllx %g3, %g1, %g2 486 487 srl %g1, 3, %g1 488 andcc %o2, 0x7, %o2 489 be,pn %icc, 85f 490 add %o1, %g1, %o1 491 ba,pt %xcc, 90f 492 sub %o0, %o1, %o3 493 494 .align 64 49580: /* 0 < len <= 16 */ 496 andcc %o3, 0x3, %g0 497 bne,pn %XCC, 90f 498 sub %o0, %o1, %o3 499 5001: 501 subcc %o2, 4, %o2 502 EX_LD(LOAD(lduw, %o1, %g1)) 503 EX_ST(STORE(stw, %g1, %o1 + %o3)) 504 bgu,pt %XCC, 1b 505 add %o1, 4, %o1 506 50785: retl 508 mov EX_RETVAL(GLOBAL_SPARE), %o0 509 510 .align 32 51190: 512 subcc %o2, 1, %o2 513 EX_LD(LOAD(ldub, %o1, %g1)) 514 EX_ST(STORE(stb, %g1, %o1 + %o3)) 515 bgu,pt %XCC, 90b 516 add %o1, 1, %o1 517 retl 518 mov EX_RETVAL(GLOBAL_SPARE), %o0 519 520 .size FUNC_NAME, .-FUNC_NAME 521