1/*- 2 * Copyright (c) 2014 Andrew Turner 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#include <machine/asm.h> 29__FBSDID("$FreeBSD$"); 30 31ENTRY(generic_bs_r_1) 32 ldrb w0, [x1, x2] 33 ret 34END(generic_bs_r_1) 35 36ENTRY(generic_bs_r_2) 37 ldrh w0, [x1, x2] 38 ret 39END(generic_bs_r_2) 40 41ENTRY(generic_bs_r_4) 42 ldr w0, [x1, x2] 43 ret 44END(generic_bs_r_4) 45 46ENTRY(generic_bs_r_8) 47 ldr x0, [x1, x2] 48 ret 49END(generic_bs_r_8) 50 51ENTRY(generic_bs_rm_1) 52 /* If there is anything to read. */ 53 cbz x4, 2f 54 55 /* Calculate the device address. */ 56 add x0, x1, x2 57 /* 58 * x0 = The device address. 59 * x3 = The kernel address. 60 * x4 = Count 61 */ 62 63 /* Read the data. */ 641: ldrb w1, [x0] 65 strb w1, [x3], #1 66 subs x4, x4, #1 67 b.ne 1b 68 692: ret 70END(generic_bs_rm_1) 71 72ENTRY(generic_bs_rm_2) 73 /* If there is anything to read. */ 74 cbz x4, 2f 75 76 /* Calculate the device address. */ 77 add x0, x1, x2 78 /* 79 * x0 = The device address. 80 * x3 = The kernel address. 81 * x4 = Count 82 */ 83 84 /* Read the data. */ 851: ldrh w1, [x0] 86 strh w1, [x3], #2 87 subs x4, x4, #1 88 b.ne 1b 89 902: ret 91END(generic_bs_rm_2) 92 93ENTRY(generic_bs_rm_4) 94 /* If there is anything to read. */ 95 cbz x4, 2f 96 97 /* Calculate the device address. */ 98 add x0, x1, x2 99 /* 100 * x0 = The device address. 101 * x3 = The kernel address. 102 * x4 = Count 103 */ 104 105 /* Read the data. */ 1061: ldr w1, [x0] 107 str w1, [x3], #4 108 subs x4, x4, #1 109 b.ne 1b 110 1112: ret 112END(generic_bs_rm_4) 113 114ENTRY(generic_bs_rm_8) 115 /* If there is anything to read. */ 116 cbz x4, 2f 117 118 /* Calculate the device address. */ 119 add x0, x1, x2 120 /* 121 * x0 = The device address. 122 * x3 = The kernel address. 123 * x4 = Count 124 */ 125 126 /* Read the data. */ 1271: ldr x1, [x0] 128 str x1, [x3], #8 129 subs x4, x4, #1 130 b.ne 1b 131 1322: ret 133END(generic_bs_rm_8) 134 135ENTRY(generic_bs_rr_1) 136 /* Is there is anything to read. */ 137 cbz x4, 2f 138 139 /* Calculate the device address. */ 140 add x0, x1, x2 141 /* 142 * x0 = The device address. 143 * x3 = The kernel address. 144 * x4 = Count 145 */ 146 147 /* Read the data. */ 1481: ldrb w1, [x0], #1 149 strb w1, [x3], #1 150 subs x4, x4, #1 151 b.ne 1b 152 1532: ret 154END(generic_bs_rr_1) 155 156ENTRY(generic_bs_rr_2) 157 /* Is there is anything to read. */ 158 cbz x4, 2f 159 160 /* Calculate the device address. */ 161 add x0, x1, x2 162 /* 163 * x0 = The device address. 164 * x3 = The kernel address. 165 * x4 = Count 166 */ 167 168 /* Read the data. */ 1691: ldrh w1, [x0], #2 170 strh w1, [x3], #2 171 subs x4, x4, #1 172 b.ne 1b 173 1742: ret 175END(generic_bs_rr_2) 176 177ENTRY(generic_bs_rr_4) 178 /* Is there is anything to read. */ 179 cbz x4, 2f 180 181 /* Calculate the device address. */ 182 add x0, x1, x2 183 /* 184 * x0 = The device address. 185 * x3 = The kernel address. 186 * x4 = Count 187 */ 188 189 /* Read the data. */ 1901: ldr w1, [x0], #4 191 str w1, [x3], #4 192 subs x4, x4, #1 193 b.ne 1b 194 1952: ret 196END(generic_bs_rr_4) 197 198ENTRY(generic_bs_rr_8) 199 /* Is there is anything to read. */ 200 cbz x4, 2f 201 202 /* Calculate the device address. */ 203 add x0, x1, x2 204 /* 205 * x0 = The device address. 206 * x3 = The kernel address. 207 * x4 = Count 208 */ 209 210 /* Read the data. */ 2111: ldr x1, [x0], #8 212 str x1, [x3], #8 213 subs x4, x4, #1 214 b.ne 1b 215 2162: ret 217END(generic_bs_rr_8) 218 219 220ENTRY(generic_bs_w_1) 221 strb w3, [x1, x2] 222 ret 223END(generic_bs_w_1) 224 225ENTRY(generic_bs_w_2) 226 strh w3, [x1, x2] 227 ret 228END(generic_bs_w_2) 229 230ENTRY(generic_bs_w_4) 231 str w3, [x1, x2] 232 ret 233END(generic_bs_w_4) 234 235ENTRY(generic_bs_w_8) 236 str x3, [x1, x2] 237 ret 238END(generic_bs_w_8) 239 240ENTRY(generic_bs_wm_1) 241 /* If there is anything to write. */ 242 cbz x4, 2f 243 244 add x0, x1, x2 245 /* 246 * x0 = The device address. 247 * x3 = The kernel address. 248 * x4 = Count 249 */ 250 251 /* Write the data */ 2521: ldrb w1, [x3], #1 253 strb w1, [x0] 254 subs x4, x4, #1 255 b.ne 1b 256 2572: ret 258END(generic_bs_wm_1) 259 260ENTRY(generic_bs_wm_2) 261 /* If there is anything to write. */ 262 cbz x4, 2f 263 264 add x0, x1, x2 265 /* 266 * x0 = The device address. 267 * x3 = The kernel address. 268 * x4 = Count 269 */ 270 271 /* Write the data */ 2721: ldrh w1, [x3], #2 273 strh w1, [x0] 274 subs x4, x4, #1 275 b.ne 1b 276 2772: ret 278END(generic_bs_wm_2) 279 280ENTRY(generic_bs_wm_4) 281 /* If there is anything to write. */ 282 cbz x4, 2f 283 284 add x0, x1, x2 285 /* 286 * x0 = The device address. 287 * x3 = The kernel address. 288 * x4 = Count 289 */ 290 291 /* Write the data */ 2921: ldr w1, [x3], #4 293 str w1, [x0] 294 subs x4, x4, #1 295 b.ne 1b 296 2972: ret 298END(generic_bs_wm_4) 299 300ENTRY(generic_bs_wm_8) 301 /* If there is anything to write. */ 302 cbz x4, 2f 303 304 add x0, x1, x2 305 /* 306 * x0 = The device address. 307 * x3 = The kernel address. 308 * x4 = Count 309 */ 310 311 /* Write the data */ 3121: ldr x1, [x3], #8 313 str x1, [x0] 314 subs x4, x4, #1 315 b.ne 1b 316 3172: ret 318END(generic_bs_wm_8) 319 320ENTRY(generic_bs_wr_1) 321 /* Is there is anything to write. */ 322 cbz x4, 2f 323 324 add x0, x1, x2 325 /* 326 * x0 = The device address. 327 * x3 = The kernel address. 328 * x4 = Count 329 */ 330 331 /* Write the data */ 3321: ldrb w1, [x3], #1 333 strb w1, [x0], #1 334 subs x4, x4, #1 335 b.ne 1b 336 3372: ret 338END(generic_bs_wr_1) 339 340ENTRY(generic_bs_wr_2) 341 /* Is there is anything to write. */ 342 cbz x4, 2f 343 344 add x0, x1, x2 345 /* 346 * x0 = The device address. 347 * x3 = The kernel address. 348 * x4 = Count 349 */ 350 351 /* Write the data */ 3521: ldrh w1, [x3], #2 353 strh w1, [x0], #2 354 subs x4, x4, #1 355 b.ne 1b 356 3572: ret 358END(generic_bs_wr_2) 359 360ENTRY(generic_bs_wr_4) 361 /* Is there is anything to write. */ 362 cbz x4, 2f 363 364 add x0, x1, x2 365 /* 366 * x0 = The device address. 367 * x3 = The kernel address. 368 * x4 = Count 369 */ 370 371 /* Write the data */ 3721: ldr w1, [x3], #4 373 str w1, [x0], #4 374 subs x4, x4, #1 375 b.ne 1b 376 3772: ret 378END(generic_bs_wr_4) 379 380ENTRY(generic_bs_wr_8) 381 /* Is there is anything to write. */ 382 cbz x4, 2f 383 384 add x0, x1, x2 385 /* 386 * x0 = The device address. 387 * x3 = The kernel address. 388 * x4 = Count 389 */ 390 391 /* Write the data */ 3921: ldr x1, [x3], #8 393 str x1, [x0], #8 394 subs x4, x4, #1 395 b.ne 1b 396 3972: ret 398END(generic_bs_wr_8) 399 400ENTRY(generic_bs_fault) 401 mov x0, #-1 402 ret 403END(generic_bs_fault) 404 405ENTRY(generic_bs_peek_1) 406 .globl generic_bs_peek_1f 407generic_bs_peek_1f: 408 ldrb w0, [x1, x2] /* Checked instruction */ 409 dsb sy 410 strb w0,[x3] 411 mov x0, #0 412 ret 413END(generic_bs_peek_1) 414 415ENTRY(generic_bs_peek_2) 416 .globl generic_bs_peek_2f 417generic_bs_peek_2f: 418 ldrh w0, [x1, x2] /* Checked instruction */ 419 dsb sy 420 strh w0,[x3] 421 mov x0, #0 422 ret 423END(generic_bs_peek_2) 424 425ENTRY(generic_bs_peek_4) 426 .globl generic_bs_peek_4f 427generic_bs_peek_4f: 428 ldr w0, [x1, x2] /* Checked instruction */ 429 dsb sy 430 str w0,[x3] 431 mov x0, #0 432 ret 433END(generic_bs_peek_4) 434 435ENTRY(generic_bs_peek_8) 436 .globl generic_bs_peek_8f 437generic_bs_peek_8f: 438 ldr x0, [x1, x2] /* Checked instruction */ 439 dsb sy 440 str x0,[x3] 441 mov x0, #0 442 ret 443END(generic_bs_peek_8) 444 445ENTRY(generic_bs_poke_1) 446 .globl generic_bs_poke_1f 447generic_bs_poke_1f: 448 strb w3, [x1, x2] /* Checked instruction */ 449 dsb sy 450 mov x0, #0 451 ret 452END(generic_bs_poke_1) 453 454ENTRY(generic_bs_poke_2) 455 .globl generic_bs_poke_2f 456generic_bs_poke_2f: 457 strh w3, [x1, x2] /* Checked instruction */ 458 dsb sy 459 mov x0, #0 460 ret 461END(generic_bs_poke_2) 462 463ENTRY(generic_bs_poke_4) 464 .globl generic_bs_poke_4f 465generic_bs_poke_4f: 466 str w3, [x1, x2] /* Checked instruction */ 467 dsb sy 468 mov x0, #0 469 ret 470END(generic_bs_poke_4) 471 472ENTRY(generic_bs_poke_8) 473 .globl generic_bs_poke_8f 474generic_bs_poke_8f: 475 str x3, [x1, x2] /* Checked instruction */ 476 dsb sy 477 mov x0, #0 478 ret 479END(generic_bs_poke_8) 480