1/* head.S: Initial boot code for the Sparc64 port of Linux. 2 * 3 * Copyright (C) 1996, 1997, 2007 David S. Miller (davem@davemloft.net) 4 * Copyright (C) 1996 David Sitsky (David.Sitsky@anu.edu.au) 5 * Copyright (C) 1997, 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 6 * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx) 7 */ 8 9#include <linux/version.h> 10#include <linux/errno.h> 11#include <linux/threads.h> 12#include <linux/init.h> 13#include <linux/linkage.h> 14#include <asm/thread_info.h> 15#include <asm/asi.h> 16#include <asm/pstate.h> 17#include <asm/ptrace.h> 18#include <asm/spitfire.h> 19#include <asm/page.h> 20#include <asm/pgtable.h> 21#include <asm/errno.h> 22#include <asm/signal.h> 23#include <asm/processor.h> 24#include <asm/lsu.h> 25#include <asm/dcr.h> 26#include <asm/dcu.h> 27#include <asm/head.h> 28#include <asm/ttable.h> 29#include <asm/mmu.h> 30#include <asm/cpudata.h> 31#include <asm/pil.h> 32#include <asm/estate.h> 33#include <asm/sfafsr.h> 34#include <asm/unistd.h> 35 36/* This section from from _start to sparc64_boot_end should fit into 37 * 0x0000000000404000 to 0x0000000000408000. 38 */ 39 .text 40 .globl start, _start, stext, _stext 41_start: 42start: 43_stext: 44stext: 45! 0x0000000000404000 46 b sparc64_boot 47 flushw /* Flush register file. */ 48 49/* This stuff has to be in sync with SILO and other potential boot loaders 50 * Fields should be kept upward compatible and whenever any change is made, 51 * HdrS version should be incremented. 52 */ 53 .global root_flags, ram_flags, root_dev 54 .global sparc_ramdisk_image, sparc_ramdisk_size 55 .global sparc_ramdisk_image64 56 57 .ascii "HdrS" 58 .word LINUX_VERSION_CODE 59 60 /* History: 61 * 62 * 0x0300 : Supports being located at other than 0x4000 63 * 0x0202 : Supports kernel params string 64 * 0x0201 : Supports reboot_command 65 */ 66 .half 0x0301 /* HdrS version */ 67 68root_flags: 69 .half 1 70root_dev: 71 .half 0 72ram_flags: 73 .half 0 74sparc_ramdisk_image: 75 .word 0 76sparc_ramdisk_size: 77 .word 0 78 .xword reboot_command 79 .xword bootstr_info 80sparc_ramdisk_image64: 81 .xword 0 82 .word _end 83 84 /* PROM cif handler code address is in %o4. */ 85sparc64_boot: 86 mov %o4, %l7 87 88 /* We need to remap the kernel. Use position independent 89 * code to remap us to KERNBASE. 90 * 91 * SILO can invoke us with 32-bit address masking enabled, 92 * so make sure that's clear. 93 */ 94 rdpr %pstate, %g1 95 andn %g1, PSTATE_AM, %g1 96 wrpr %g1, 0x0, %pstate 97 ba,a,pt %xcc, 1f 98 99 .globl prom_finddev_name, prom_chosen_path, prom_root_node 100 .globl prom_getprop_name, prom_mmu_name, prom_peer_name 101 .globl prom_callmethod_name, prom_translate_name, prom_root_compatible 102 .globl prom_map_name, prom_unmap_name, prom_mmu_ihandle_cache 103 .globl prom_boot_mapped_pc, prom_boot_mapping_mode 104 .globl prom_boot_mapping_phys_high, prom_boot_mapping_phys_low 105 .globl prom_compatible_name, prom_cpu_path, prom_cpu_compatible 106 .globl is_sun4v, sun4v_chip_type, prom_set_trap_table_name 107prom_peer_name: 108 .asciz "peer" 109prom_compatible_name: 110 .asciz "compatible" 111prom_finddev_name: 112 .asciz "finddevice" 113prom_chosen_path: 114 .asciz "/chosen" 115prom_cpu_path: 116 .asciz "/cpu" 117prom_getprop_name: 118 .asciz "getprop" 119prom_mmu_name: 120 .asciz "mmu" 121prom_callmethod_name: 122 .asciz "call-method" 123prom_translate_name: 124 .asciz "translate" 125prom_map_name: 126 .asciz "map" 127prom_unmap_name: 128 .asciz "unmap" 129prom_set_trap_table_name: 130 .asciz "SUNW,set-trap-table" 131prom_sun4v_name: 132 .asciz "sun4v" 133prom_niagara_prefix: 134 .asciz "SUNW,UltraSPARC-T" 135prom_sparc_prefix: 136 .asciz "SPARC-" 137prom_sparc64x_prefix: 138 .asciz "SPARC64-X" 139 .align 4 140prom_root_compatible: 141 .skip 64 142prom_cpu_compatible: 143 .skip 64 144prom_root_node: 145 .word 0 146prom_mmu_ihandle_cache: 147 .word 0 148prom_boot_mapped_pc: 149 .word 0 150prom_boot_mapping_mode: 151 .word 0 152 .align 8 153prom_boot_mapping_phys_high: 154 .xword 0 155prom_boot_mapping_phys_low: 156 .xword 0 157is_sun4v: 158 .word 0 159sun4v_chip_type: 160 .word SUN4V_CHIP_INVALID 1611: 162 rd %pc, %l0 163 164 mov (1b - prom_peer_name), %l1 165 sub %l0, %l1, %l1 166 mov 0, %l2 167 168 /* prom_root_node = prom_peer(0) */ 169 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "peer" 170 mov 1, %l3 171 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1 172 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 173 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, 0 174 stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 175 call %l7 176 add %sp, (2047 + 128), %o0 ! argument array 177 178 ldx [%sp + 2047 + 128 + 0x20], %l4 ! prom root node 179 mov (1b - prom_root_node), %l1 180 sub %l0, %l1, %l1 181 stw %l4, [%l1] 182 183 mov (1b - prom_getprop_name), %l1 184 mov (1b - prom_compatible_name), %l2 185 mov (1b - prom_root_compatible), %l5 186 sub %l0, %l1, %l1 187 sub %l0, %l2, %l2 188 sub %l0, %l5, %l5 189 190 /* prom_getproperty(prom_root_node, "compatible", 191 * &prom_root_compatible, 64) 192 */ 193 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop" 194 mov 4, %l3 195 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4 196 mov 1, %l3 197 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 198 stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, prom_root_node 199 stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible" 200 stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_root_compatible 201 mov 64, %l3 202 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size 203 stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 204 call %l7 205 add %sp, (2047 + 128), %o0 ! argument array 206 207 mov (1b - prom_finddev_name), %l1 208 mov (1b - prom_chosen_path), %l2 209 mov (1b - prom_boot_mapped_pc), %l3 210 sub %l0, %l1, %l1 211 sub %l0, %l2, %l2 212 sub %l0, %l3, %l3 213 stw %l0, [%l3] 214 sub %sp, (192 + 128), %sp 215 216 /* chosen_node = prom_finddevice("/chosen") */ 217 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "finddevice" 218 mov 1, %l3 219 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1 220 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 221 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, "/chosen" 222 stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 223 call %l7 224 add %sp, (2047 + 128), %o0 ! argument array 225 226 ldx [%sp + 2047 + 128 + 0x20], %l4 ! chosen device node 227 228 mov (1b - prom_getprop_name), %l1 229 mov (1b - prom_mmu_name), %l2 230 mov (1b - prom_mmu_ihandle_cache), %l5 231 sub %l0, %l1, %l1 232 sub %l0, %l2, %l2 233 sub %l0, %l5, %l5 234 235 /* prom_mmu_ihandle_cache = prom_getint(chosen_node, "mmu") */ 236 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop" 237 mov 4, %l3 238 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4 239 mov 1, %l3 240 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 241 stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, chosen_node 242 stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "mmu" 243 stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_mmu_ihandle_cache 244 mov 4, %l3 245 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, sizeof(arg3) 246 stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 247 call %l7 248 add %sp, (2047 + 128), %o0 ! argument array 249 250 mov (1b - prom_callmethod_name), %l1 251 mov (1b - prom_translate_name), %l2 252 sub %l0, %l1, %l1 253 sub %l0, %l2, %l2 254 lduw [%l5], %l5 ! prom_mmu_ihandle_cache 255 256 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "call-method" 257 mov 3, %l3 258 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 3 259 mov 5, %l3 260 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 5 261 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1: "translate" 262 stx %l5, [%sp + 2047 + 128 + 0x20] ! arg2: prom_mmu_ihandle_cache 263 /* PAGE align */ 264 srlx %l0, 13, %l3 265 sllx %l3, 13, %l3 266 stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: vaddr, our PC 267 stx %g0, [%sp + 2047 + 128 + 0x30] ! res1 268 stx %g0, [%sp + 2047 + 128 + 0x38] ! res2 269 stx %g0, [%sp + 2047 + 128 + 0x40] ! res3 270 stx %g0, [%sp + 2047 + 128 + 0x48] ! res4 271 stx %g0, [%sp + 2047 + 128 + 0x50] ! res5 272 call %l7 273 add %sp, (2047 + 128), %o0 ! argument array 274 275 ldx [%sp + 2047 + 128 + 0x40], %l1 ! translation mode 276 mov (1b - prom_boot_mapping_mode), %l4 277 sub %l0, %l4, %l4 278 stw %l1, [%l4] 279 mov (1b - prom_boot_mapping_phys_high), %l4 280 sub %l0, %l4, %l4 281 ldx [%sp + 2047 + 128 + 0x48], %l2 ! physaddr high 282 stx %l2, [%l4 + 0x0] 283 ldx [%sp + 2047 + 128 + 0x50], %l3 ! physaddr low 284 /* 4MB align */ 285 srlx %l3, ILOG2_4MB, %l3 286 sllx %l3, ILOG2_4MB, %l3 287 stx %l3, [%l4 + 0x8] 288 289 /* Leave service as-is, "call-method" */ 290 mov 7, %l3 291 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 7 292 mov 1, %l3 293 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 294 mov (1b - prom_map_name), %l3 295 sub %l0, %l3, %l3 296 stx %l3, [%sp + 2047 + 128 + 0x18] ! arg1: "map" 297 /* Leave arg2 as-is, prom_mmu_ihandle_cache */ 298 mov -1, %l3 299 stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: mode (-1 default) 300 /* 4MB align the kernel image size. */ 301 set (_end - KERNBASE), %l3 302 set ((4 * 1024 * 1024) - 1), %l4 303 add %l3, %l4, %l3 304 andn %l3, %l4, %l3 305 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4: roundup(ksize, 4MB) 306 sethi %hi(KERNBASE), %l3 307 stx %l3, [%sp + 2047 + 128 + 0x38] ! arg5: vaddr (KERNBASE) 308 stx %g0, [%sp + 2047 + 128 + 0x40] ! arg6: empty 309 mov (1b - prom_boot_mapping_phys_low), %l3 310 sub %l0, %l3, %l3 311 ldx [%l3], %l3 312 stx %l3, [%sp + 2047 + 128 + 0x48] ! arg7: phys addr 313 call %l7 314 add %sp, (2047 + 128), %o0 ! argument array 315 316 add %sp, (192 + 128), %sp 317 318 sethi %hi(prom_root_compatible), %g1 319 or %g1, %lo(prom_root_compatible), %g1 320 sethi %hi(prom_sun4v_name), %g7 321 or %g7, %lo(prom_sun4v_name), %g7 322 mov 5, %g3 32390: ldub [%g7], %g2 324 ldub [%g1], %g4 325 cmp %g2, %g4 326 bne,pn %icc, 80f 327 add %g7, 1, %g7 328 subcc %g3, 1, %g3 329 bne,pt %xcc, 90b 330 add %g1, 1, %g1 331 332 sethi %hi(is_sun4v), %g1 333 or %g1, %lo(is_sun4v), %g1 334 mov 1, %g7 335 stw %g7, [%g1] 336 337 /* cpu_node = prom_finddevice("/cpu") */ 338 mov (1b - prom_finddev_name), %l1 339 mov (1b - prom_cpu_path), %l2 340 sub %l0, %l1, %l1 341 sub %l0, %l2, %l2 342 sub %sp, (192 + 128), %sp 343 344 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "finddevice" 345 mov 1, %l3 346 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1 347 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 348 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, "/cpu" 349 stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 350 call %l7 351 add %sp, (2047 + 128), %o0 ! argument array 352 353 ldx [%sp + 2047 + 128 + 0x20], %l4 ! cpu device node 354 355 mov (1b - prom_getprop_name), %l1 356 mov (1b - prom_compatible_name), %l2 357 mov (1b - prom_cpu_compatible), %l5 358 sub %l0, %l1, %l1 359 sub %l0, %l2, %l2 360 sub %l0, %l5, %l5 361 362 /* prom_getproperty(cpu_node, "compatible", 363 * &prom_cpu_compatible, 64) 364 */ 365 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop" 366 mov 4, %l3 367 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4 368 mov 1, %l3 369 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 370 stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, cpu_node 371 stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible" 372 stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_cpu_compatible 373 mov 64, %l3 374 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size 375 stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 376 call %l7 377 add %sp, (2047 + 128), %o0 ! argument array 378 379 add %sp, (192 + 128), %sp 380 381 sethi %hi(prom_cpu_compatible), %g1 382 or %g1, %lo(prom_cpu_compatible), %g1 383 sethi %hi(prom_niagara_prefix), %g7 384 or %g7, %lo(prom_niagara_prefix), %g7 385 mov 17, %g3 38690: ldub [%g7], %g2 387 ldub [%g1], %g4 388 cmp %g2, %g4 389 bne,pn %icc, 89f 390 add %g7, 1, %g7 391 subcc %g3, 1, %g3 392 bne,pt %xcc, 90b 393 add %g1, 1, %g1 394 ba,pt %xcc, 91f 395 nop 396 39789: sethi %hi(prom_cpu_compatible), %g1 398 or %g1, %lo(prom_cpu_compatible), %g1 399 sethi %hi(prom_sparc_prefix), %g7 400 or %g7, %lo(prom_sparc_prefix), %g7 401 mov 6, %g3 40290: ldub [%g7], %g2 403 ldub [%g1], %g4 404 cmp %g2, %g4 405 bne,pn %icc, 4f 406 add %g7, 1, %g7 407 subcc %g3, 1, %g3 408 bne,pt %xcc, 90b 409 add %g1, 1, %g1 410 411 sethi %hi(prom_cpu_compatible), %g1 412 or %g1, %lo(prom_cpu_compatible), %g1 413 ldub [%g1 + 6], %g2 414 cmp %g2, 'T' 415 be,pt %xcc, 70f 416 cmp %g2, 'M' 417 bne,pn %xcc, 49f 418 nop 419 42070: ldub [%g1 + 7], %g2 421 cmp %g2, '3' 422 be,pt %xcc, 5f 423 mov SUN4V_CHIP_NIAGARA3, %g4 424 cmp %g2, '4' 425 be,pt %xcc, 5f 426 mov SUN4V_CHIP_NIAGARA4, %g4 427 cmp %g2, '5' 428 be,pt %xcc, 5f 429 mov SUN4V_CHIP_NIAGARA5, %g4 430 cmp %g2, '6' 431 be,pt %xcc, 5f 432 mov SUN4V_CHIP_SPARC_M6, %g4 433 cmp %g2, '7' 434 be,pt %xcc, 5f 435 mov SUN4V_CHIP_SPARC_M7, %g4 436 ba,pt %xcc, 49f 437 nop 438 43991: sethi %hi(prom_cpu_compatible), %g1 440 or %g1, %lo(prom_cpu_compatible), %g1 441 ldub [%g1 + 17], %g2 442 cmp %g2, '1' 443 be,pt %xcc, 5f 444 mov SUN4V_CHIP_NIAGARA1, %g4 445 cmp %g2, '2' 446 be,pt %xcc, 5f 447 mov SUN4V_CHIP_NIAGARA2, %g4 448 4494: 450 /* Athena */ 451 sethi %hi(prom_cpu_compatible), %g1 452 or %g1, %lo(prom_cpu_compatible), %g1 453 sethi %hi(prom_sparc64x_prefix), %g7 454 or %g7, %lo(prom_sparc64x_prefix), %g7 455 mov 9, %g3 45641: ldub [%g7], %g2 457 ldub [%g1], %g4 458 cmp %g2, %g4 459 bne,pn %icc, 49f 460 add %g7, 1, %g7 461 subcc %g3, 1, %g3 462 bne,pt %xcc, 41b 463 add %g1, 1, %g1 464 ba,pt %xcc, 5f 465 mov SUN4V_CHIP_SPARC64X, %g4 466 46749: 468 mov SUN4V_CHIP_UNKNOWN, %g4 4695: sethi %hi(sun4v_chip_type), %g2 470 or %g2, %lo(sun4v_chip_type), %g2 471 stw %g4, [%g2] 472 47380: 474 BRANCH_IF_SUN4V(g1, jump_to_sun4u_init) 475 BRANCH_IF_CHEETAH_BASE(g1,g7,cheetah_boot) 476 BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,cheetah_plus_boot) 477 ba,pt %xcc, spitfire_boot 478 nop 479 480cheetah_plus_boot: 481 /* Preserve OBP chosen DCU and DCR register settings. */ 482 ba,pt %xcc, cheetah_generic_boot 483 nop 484 485cheetah_boot: 486 mov DCR_BPE | DCR_RPE | DCR_SI | DCR_IFPOE | DCR_MS, %g1 487 wr %g1, %asr18 488 489 sethi %uhi(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g7 490 or %g7, %ulo(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g7 491 sllx %g7, 32, %g7 492 or %g7, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g7 493 stxa %g7, [%g0] ASI_DCU_CONTROL_REG 494 membar #Sync 495 496cheetah_generic_boot: 497 mov TSB_EXTENSION_P, %g3 498 stxa %g0, [%g3] ASI_DMMU 499 stxa %g0, [%g3] ASI_IMMU 500 membar #Sync 501 502 mov TSB_EXTENSION_S, %g3 503 stxa %g0, [%g3] ASI_DMMU 504 membar #Sync 505 506 mov TSB_EXTENSION_N, %g3 507 stxa %g0, [%g3] ASI_DMMU 508 stxa %g0, [%g3] ASI_IMMU 509 membar #Sync 510 511 ba,a,pt %xcc, jump_to_sun4u_init 512 513spitfire_boot: 514 /* Typically PROM has already enabled both MMU's and both on-chip 515 * caches, but we do it here anyway just to be paranoid. 516 */ 517 mov (LSU_CONTROL_IC|LSU_CONTROL_DC|LSU_CONTROL_IM|LSU_CONTROL_DM), %g1 518 stxa %g1, [%g0] ASI_LSU_CONTROL 519 membar #Sync 520 521jump_to_sun4u_init: 522 /* 523 * Make sure we are in privileged mode, have address masking, 524 * using the ordinary globals and have enabled floating 525 * point. 526 * 527 * Again, typically PROM has left %pil at 13 or similar, and 528 * (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE) in %pstate. 529 */ 530 wrpr %g0, (PSTATE_PRIV|PSTATE_PEF|PSTATE_IE), %pstate 531 wr %g0, 0, %fprs 532 533 set sun4u_init, %g2 534 jmpl %g2 + %g0, %g0 535 nop 536 537 __REF 538sun4u_init: 539 BRANCH_IF_SUN4V(g1, sun4v_init) 540 541 /* Set ctx 0 */ 542 mov PRIMARY_CONTEXT, %g7 543 stxa %g0, [%g7] ASI_DMMU 544 membar #Sync 545 546 mov SECONDARY_CONTEXT, %g7 547 stxa %g0, [%g7] ASI_DMMU 548 membar #Sync 549 550 ba,a,pt %xcc, sun4u_continue 551 552sun4v_init: 553 /* Set ctx 0 */ 554 mov PRIMARY_CONTEXT, %g7 555 stxa %g0, [%g7] ASI_MMU 556 membar #Sync 557 558 mov SECONDARY_CONTEXT, %g7 559 stxa %g0, [%g7] ASI_MMU 560 membar #Sync 561 ba,a,pt %xcc, niagara_tlb_fixup 562 563sun4u_continue: 564 BRANCH_IF_ANY_CHEETAH(g1, g7, cheetah_tlb_fixup) 565 566 ba,a,pt %xcc, spitfire_tlb_fixup 567 568niagara_tlb_fixup: 569 mov 3, %g2 /* Set TLB type to hypervisor. */ 570 sethi %hi(tlb_type), %g1 571 stw %g2, [%g1 + %lo(tlb_type)] 572 573 /* Patch copy/clear ops. */ 574 sethi %hi(sun4v_chip_type), %g1 575 lduw [%g1 + %lo(sun4v_chip_type)], %g1 576 cmp %g1, SUN4V_CHIP_NIAGARA1 577 be,pt %xcc, niagara_patch 578 cmp %g1, SUN4V_CHIP_NIAGARA2 579 be,pt %xcc, niagara2_patch 580 nop 581 cmp %g1, SUN4V_CHIP_NIAGARA3 582 be,pt %xcc, niagara2_patch 583 nop 584 cmp %g1, SUN4V_CHIP_NIAGARA4 585 be,pt %xcc, niagara4_patch 586 nop 587 cmp %g1, SUN4V_CHIP_NIAGARA5 588 be,pt %xcc, niagara4_patch 589 nop 590 cmp %g1, SUN4V_CHIP_SPARC_M6 591 be,pt %xcc, niagara4_patch 592 nop 593 cmp %g1, SUN4V_CHIP_SPARC_M7 594 be,pt %xcc, niagara4_patch 595 nop 596 597 call generic_patch_copyops 598 nop 599 call generic_patch_bzero 600 nop 601 call generic_patch_pageops 602 nop 603 604 ba,a,pt %xcc, 80f 605niagara4_patch: 606 call niagara4_patch_copyops 607 nop 608 call niagara4_patch_bzero 609 nop 610 call niagara4_patch_pageops 611 nop 612 613 ba,a,pt %xcc, 80f 614 615niagara2_patch: 616 call niagara2_patch_copyops 617 nop 618 call niagara_patch_bzero 619 nop 620 call niagara_patch_pageops 621 nop 622 623 ba,a,pt %xcc, 80f 624 625niagara_patch: 626 call niagara_patch_copyops 627 nop 628 call niagara_patch_bzero 629 nop 630 call niagara_patch_pageops 631 nop 632 63380: 634 /* Patch TLB/cache ops. */ 635 call hypervisor_patch_cachetlbops 636 nop 637 638 ba,a,pt %xcc, tlb_fixup_done 639 640cheetah_tlb_fixup: 641 mov 2, %g2 /* Set TLB type to cheetah+. */ 642 BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,1f) 643 644 mov 1, %g2 /* Set TLB type to cheetah. */ 645 6461: sethi %hi(tlb_type), %g1 647 stw %g2, [%g1 + %lo(tlb_type)] 648 649 /* Patch copy/page operations to cheetah optimized versions. */ 650 call cheetah_patch_copyops 651 nop 652 call cheetah_patch_copy_page 653 nop 654 call cheetah_patch_cachetlbops 655 nop 656 657 ba,a,pt %xcc, tlb_fixup_done 658 659spitfire_tlb_fixup: 660 /* Set TLB type to spitfire. */ 661 mov 0, %g2 662 sethi %hi(tlb_type), %g1 663 stw %g2, [%g1 + %lo(tlb_type)] 664 665tlb_fixup_done: 666 sethi %hi(init_thread_union), %g6 667 or %g6, %lo(init_thread_union), %g6 668 ldx [%g6 + TI_TASK], %g4 669 670 wr %g0, ASI_P, %asi 671 mov 1, %g1 672 sllx %g1, THREAD_SHIFT, %g1 673 sub %g1, (STACKFRAME_SZ + STACK_BIAS), %g1 674 add %g6, %g1, %sp 675 676 /* Set per-cpu pointer initially to zero, this makes 677 * the boot-cpu use the in-kernel-image per-cpu areas 678 * before setup_per_cpu_area() is invoked. 679 */ 680 clr %g5 681 682 wrpr %g0, 0, %wstate 683 wrpr %g0, 0x0, %tl 684 685 /* Clear the bss */ 686 sethi %hi(__bss_start), %o0 687 or %o0, %lo(__bss_start), %o0 688 sethi %hi(_end), %o1 689 or %o1, %lo(_end), %o1 690 call __bzero 691 sub %o1, %o0, %o1 692 693#ifdef CONFIG_LOCKDEP 694 /* We have this call this super early, as even prom_init can grab 695 * spinlocks and thus call into the lockdep code. 696 */ 697 call lockdep_init 698 nop 699#endif 700 701 call prom_init 702 mov %l7, %o0 ! OpenPROM cif handler 703 704 /* To create a one-register-window buffer between the kernel's 705 * initial stack and the last stack frame we use from the firmware, 706 * do the rest of the boot from a C helper function. 707 */ 708 call start_early_boot 709 nop 710 /* Not reached... */ 711 712 .previous 713 714 /* This is meant to allow the sharing of this code between 715 * boot processor invocation (via setup_tba() below) and 716 * secondary processor startup (via trampoline.S). The 717 * former does use this code, the latter does not yet due 718 * to some complexities. That should be fixed up at some 719 * point. 720 * 721 * There used to be enormous complexity wrt. transferring 722 * over from the firmware's trap table to the Linux kernel's. 723 * For example, there was a chicken & egg problem wrt. building 724 * the OBP page tables, yet needing to be on the Linux kernel 725 * trap table (to translate PAGE_OFFSET addresses) in order to 726 * do that. 727 * 728 * We now handle OBP tlb misses differently, via linear lookups 729 * into the prom_trans[] array. So that specific problem no 730 * longer exists. Yet, unfortunately there are still some issues 731 * preventing trampoline.S from using this code... ho hum. 732 */ 733 .globl setup_trap_table 734setup_trap_table: 735 save %sp, -192, %sp 736 737 /* Force interrupts to be disabled. */ 738 rdpr %pstate, %l0 739 andn %l0, PSTATE_IE, %o1 740 wrpr %o1, 0x0, %pstate 741 rdpr %pil, %l1 742 wrpr %g0, PIL_NORMAL_MAX, %pil 743 744 /* Make the firmware call to jump over to the Linux trap table. */ 745 sethi %hi(is_sun4v), %o0 746 lduw [%o0 + %lo(is_sun4v)], %o0 747 brz,pt %o0, 1f 748 nop 749 750 TRAP_LOAD_TRAP_BLOCK(%g2, %g3) 751 add %g2, TRAP_PER_CPU_FAULT_INFO, %g2 752 stxa %g2, [%g0] ASI_SCRATCHPAD 753 754 /* Compute physical address: 755 * 756 * paddr = kern_base + (mmfsa_vaddr - KERNBASE) 757 */ 758 sethi %hi(KERNBASE), %g3 759 sub %g2, %g3, %g2 760 sethi %hi(kern_base), %g3 761 ldx [%g3 + %lo(kern_base)], %g3 762 add %g2, %g3, %o1 763 sethi %hi(sparc64_ttable_tl0), %o0 764 765 set prom_set_trap_table_name, %g2 766 stx %g2, [%sp + 2047 + 128 + 0x00] 767 mov 2, %g2 768 stx %g2, [%sp + 2047 + 128 + 0x08] 769 mov 0, %g2 770 stx %g2, [%sp + 2047 + 128 + 0x10] 771 stx %o0, [%sp + 2047 + 128 + 0x18] 772 stx %o1, [%sp + 2047 + 128 + 0x20] 773 sethi %hi(p1275buf), %g2 774 or %g2, %lo(p1275buf), %g2 775 ldx [%g2 + 0x08], %o1 776 call %o1 777 add %sp, (2047 + 128), %o0 778 779 ba,a,pt %xcc, 2f 780 7811: sethi %hi(sparc64_ttable_tl0), %o0 782 set prom_set_trap_table_name, %g2 783 stx %g2, [%sp + 2047 + 128 + 0x00] 784 mov 1, %g2 785 stx %g2, [%sp + 2047 + 128 + 0x08] 786 mov 0, %g2 787 stx %g2, [%sp + 2047 + 128 + 0x10] 788 stx %o0, [%sp + 2047 + 128 + 0x18] 789 sethi %hi(p1275buf), %g2 790 or %g2, %lo(p1275buf), %g2 791 ldx [%g2 + 0x08], %o1 792 call %o1 793 add %sp, (2047 + 128), %o0 794 795 /* Start using proper page size encodings in ctx register. */ 7962: sethi %hi(sparc64_kern_pri_context), %g3 797 ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 798 799 mov PRIMARY_CONTEXT, %g1 800 801661: stxa %g2, [%g1] ASI_DMMU 802 .section .sun4v_1insn_patch, "ax" 803 .word 661b 804 stxa %g2, [%g1] ASI_MMU 805 .previous 806 807 membar #Sync 808 809 BRANCH_IF_SUN4V(o2, 1f) 810 811 /* Kill PROM timer */ 812 sethi %hi(0x80000000), %o2 813 sllx %o2, 32, %o2 814 wr %o2, 0, %tick_cmpr 815 816 BRANCH_IF_ANY_CHEETAH(o2, o3, 1f) 817 818 ba,a,pt %xcc, 2f 819 820 /* Disable STICK_INT interrupts. */ 8211: 822 sethi %hi(0x80000000), %o2 823 sllx %o2, 32, %o2 824 wr %o2, %asr25 825 8262: 827 wrpr %g0, %g0, %wstate 828 829 call init_irqwork_curcpu 830 nop 831 832 /* Now we can restore interrupt state. */ 833 wrpr %l0, 0, %pstate 834 wrpr %l1, 0x0, %pil 835 836 ret 837 restore 838 839 .globl setup_tba 840setup_tba: 841 save %sp, -192, %sp 842 843 /* The boot processor is the only cpu which invokes this 844 * routine, the other cpus set things up via trampoline.S. 845 * So save the OBP trap table address here. 846 */ 847 rdpr %tba, %g7 848 sethi %hi(prom_tba), %o1 849 or %o1, %lo(prom_tba), %o1 850 stx %g7, [%o1] 851 852 call setup_trap_table 853 nop 854 855 ret 856 restore 857sparc64_boot_end: 858 859#include "etrap_64.S" 860#include "rtrap_64.S" 861#include "winfixup.S" 862#include "fpu_traps.S" 863#include "ivec.S" 864#include "getsetcc.S" 865#include "utrap.S" 866#include "spiterrs.S" 867#include "cherrs.S" 868#include "misctrap.S" 869#include "syscalls.S" 870#include "helpers.S" 871#include "hvcalls.S" 872#include "sun4v_tlb_miss.S" 873#include "sun4v_ivec.S" 874#include "ktlb.S" 875#include "tsb.S" 876 877/* 878 * The following skip makes sure the trap table in ttable.S is aligned 879 * on a 32K boundary as required by the v9 specs for TBA register. 880 * 881 * We align to a 32K boundary, then we have the 32K kernel TSB, 882 * the 64K kernel 4MB TSB, and then the 32K aligned trap table. 883 */ 8841: 885 .skip 0x4000 + _start - 1b 886 887! 0x0000000000408000 888 889 .globl swapper_tsb 890swapper_tsb: 891 .skip (32 * 1024) 892 893 .globl swapper_4m_tsb 894swapper_4m_tsb: 895 .skip (64 * 1024) 896 897! 0x0000000000420000 898 899 /* Some care needs to be exercised if you try to move the 900 * location of the trap table relative to other things. For 901 * one thing there are br* instructions in some of the 902 * trap table entires which branch back to code in ktlb.S 903 * Those instructions can only handle a signed 16-bit 904 * displacement. 905 * 906 * There is a binutils bug (bugzilla #4558) which causes 907 * the relocation overflow checks for such instructions to 908 * not be done correctly. So bintuils will not notice the 909 * error and will instead write junk into the relocation and 910 * you'll have an unbootable kernel. 911 */ 912#include "ttable_64.S" 913 914! 0x0000000000428000 915 916#include "systbls_64.S" 917 918 .data 919 .align 8 920 .globl prom_tba, tlb_type 921prom_tba: .xword 0 922tlb_type: .word 0 /* Must NOT end up in BSS */ 923 .section ".fixup",#alloc,#execinstr 924 925 .globl __ret_efault, __retl_efault, __ret_one, __retl_one 926ENTRY(__ret_efault) 927 ret 928 restore %g0, -EFAULT, %o0 929ENDPROC(__ret_efault) 930 931ENTRY(__retl_efault) 932 retl 933 mov -EFAULT, %o0 934ENDPROC(__retl_efault) 935 936ENTRY(__retl_one) 937 retl 938 mov 1, %o0 939ENDPROC(__retl_one) 940 941ENTRY(__ret_one_asi) 942 wr %g0, ASI_AIUS, %asi 943 ret 944 restore %g0, 1, %o0 945ENDPROC(__ret_one_asi) 946 947ENTRY(__retl_one_asi) 948 wr %g0, ASI_AIUS, %asi 949 retl 950 mov 1, %o0 951ENDPROC(__retl_one_asi) 952 953ENTRY(__retl_o1) 954 retl 955 mov %o1, %o0 956ENDPROC(__retl_o1) 957