1 /*- 2 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 3 * Copyright (C) 1995, 1996 TooLs GmbH. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by TooLs GmbH. 17 * 4. The name of TooLs GmbH may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /*- 32 * Copyright (C) 2001 Benno Rice 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 44 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ 55 */ 56 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD$"); 59 60 #include "opt_ddb.h" 61 #include "opt_kstack_pages.h" 62 #include "opt_platform.h" 63 64 #include <sys/param.h> 65 #include <sys/proc.h> 66 #include <sys/systm.h> 67 #include <sys/bio.h> 68 #include <sys/buf.h> 69 #include <sys/bus.h> 70 #include <sys/cons.h> 71 #include <sys/cpu.h> 72 #include <sys/eventhandler.h> 73 #include <sys/exec.h> 74 #include <sys/imgact.h> 75 #include <sys/kdb.h> 76 #include <sys/kernel.h> 77 #include <sys/ktr.h> 78 #include <sys/linker.h> 79 #include <sys/lock.h> 80 #include <sys/malloc.h> 81 #include <sys/mbuf.h> 82 #include <sys/msgbuf.h> 83 #include <sys/mutex.h> 84 #include <sys/ptrace.h> 85 #include <sys/reboot.h> 86 #include <sys/rwlock.h> 87 #include <sys/signalvar.h> 88 #include <sys/syscallsubr.h> 89 #include <sys/sysctl.h> 90 #include <sys/sysent.h> 91 #include <sys/sysproto.h> 92 #include <sys/ucontext.h> 93 #include <sys/uio.h> 94 #include <sys/vmmeter.h> 95 #include <sys/vnode.h> 96 97 #include <net/netisr.h> 98 99 #include <vm/vm.h> 100 #include <vm/vm_extern.h> 101 #include <vm/vm_kern.h> 102 #include <vm/vm_page.h> 103 #include <vm/vm_phys.h> 104 #include <vm/vm_map.h> 105 #include <vm/vm_object.h> 106 #include <vm/vm_pager.h> 107 108 #include <machine/altivec.h> 109 #ifndef __powerpc64__ 110 #include <machine/bat.h> 111 #endif 112 #include <machine/cpu.h> 113 #include <machine/elf.h> 114 #include <machine/fpu.h> 115 #include <machine/hid.h> 116 #include <machine/kdb.h> 117 #include <machine/md_var.h> 118 #include <machine/metadata.h> 119 #include <machine/mmuvar.h> 120 #include <machine/pcb.h> 121 #include <machine/reg.h> 122 #include <machine/sigframe.h> 123 #include <machine/spr.h> 124 #include <machine/trap.h> 125 #include <machine/vmparam.h> 126 #include <machine/ofw_machdep.h> 127 128 #include <ddb/ddb.h> 129 130 #include <dev/ofw/openfirm.h> 131 #include <dev/ofw/ofw_subr.h> 132 133 int cold = 1; 134 #ifdef __powerpc64__ 135 int cacheline_size = 128; 136 #else 137 int cacheline_size = 32; 138 #endif 139 int hw_direct_map = 1; 140 141 #ifdef BOOKE 142 extern vm_paddr_t kernload; 143 #endif 144 145 extern void *ap_pcpu; 146 147 struct pcpu __pcpu[MAXCPU]; 148 static char init_kenv[2048]; 149 150 static struct trapframe frame0; 151 152 char machine[] = "powerpc"; 153 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 154 155 static void cpu_startup(void *); 156 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 157 158 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 159 CTLFLAG_RD, &cacheline_size, 0, ""); 160 161 uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *, 162 uint32_t); 163 164 long Maxmem = 0; 165 long realmem = 0; 166 167 /* Default MSR values set in the AIM/Book-E early startup code */ 168 register_t psl_kernset; 169 register_t psl_userset; 170 register_t psl_userstatic; 171 #ifdef __powerpc64__ 172 register_t psl_userset32; 173 #endif 174 175 struct kva_md_info kmi; 176 177 static void 178 cpu_startup(void *dummy) 179 { 180 181 /* 182 * Initialise the decrementer-based clock. 183 */ 184 decr_init(); 185 186 /* 187 * Good {morning,afternoon,evening,night}. 188 */ 189 cpu_setup(PCPU_GET(cpuid)); 190 191 #ifdef PERFMON 192 perfmon_init(); 193 #endif 194 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)physmem), 195 ptoa((uintmax_t)physmem) / 1048576); 196 realmem = physmem; 197 198 if (bootverbose) 199 printf("available KVA = %zu (%zu MB)\n", 200 virtual_end - virtual_avail, 201 (virtual_end - virtual_avail) / 1048576); 202 203 /* 204 * Display any holes after the first chunk of extended memory. 205 */ 206 if (bootverbose) { 207 int indx; 208 209 printf("Physical memory chunk(s):\n"); 210 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 211 vm_paddr_t size1 = 212 phys_avail[indx + 1] - phys_avail[indx]; 213 214 #ifdef __powerpc64__ 215 printf("0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n", 216 #else 217 printf("0x%09jx - 0x%09jx, %ju bytes (%ju pages)\n", 218 #endif 219 (uintmax_t)phys_avail[indx], 220 (uintmax_t)phys_avail[indx + 1] - 1, 221 (uintmax_t)size1, (uintmax_t)size1 / PAGE_SIZE); 222 } 223 } 224 225 vm_ksubmap_init(&kmi); 226 227 printf("avail memory = %ju (%ju MB)\n", 228 ptoa((uintmax_t)vm_free_count()), 229 ptoa((uintmax_t)vm_free_count()) / 1048576); 230 231 /* 232 * Set up buffers, so they can be used to read disk labels. 233 */ 234 bufinit(); 235 vm_pager_bufferinit(); 236 } 237 238 extern vm_offset_t __startkernel, __endkernel; 239 extern unsigned char __bss_start[]; 240 extern unsigned char __sbss_start[]; 241 extern unsigned char __sbss_end[]; 242 extern unsigned char _end[]; 243 244 void aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, 245 void *mdp, uint32_t mdp_cookie); 246 void aim_cpu_init(vm_offset_t toc); 247 void booke_cpu_init(void); 248 249 uintptr_t 250 powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp, 251 uint32_t mdp_cookie) 252 { 253 struct pcpu *pc; 254 struct cpuref bsp; 255 vm_offset_t startkernel, endkernel; 256 char *env; 257 bool ofw_bootargs = false; 258 #ifdef DDB 259 vm_offset_t ksym_start; 260 vm_offset_t ksym_end; 261 #endif 262 263 /* First guess at start/end kernel positions */ 264 startkernel = __startkernel; 265 endkernel = __endkernel; 266 267 /* 268 * If the metadata pointer cookie is not set to the magic value, 269 * the number in mdp should be treated as nonsense. 270 */ 271 if (mdp_cookie != 0xfb5d104d) 272 mdp = NULL; 273 274 #if !defined(BOOKE) 275 /* 276 * On BOOKE the BSS is already cleared and some variables 277 * initialized. Do not wipe them out. 278 */ 279 bzero(__sbss_start, __sbss_end - __sbss_start); 280 bzero(__bss_start, _end - __bss_start); 281 #endif 282 283 cpu_feature_setup(); 284 285 #ifdef AIM 286 aim_early_init(fdt, toc, ofentry, mdp, mdp_cookie); 287 #endif 288 289 /* 290 * Parse metadata if present and fetch parameters. Must be done 291 * before console is inited so cninit gets the right value of 292 * boothowto. 293 */ 294 if (mdp != NULL) { 295 void *kmdp = NULL; 296 char *envp = NULL; 297 uintptr_t md_offset = 0; 298 vm_paddr_t kernelendphys; 299 300 #ifdef AIM 301 if ((uintptr_t)&powerpc_init > DMAP_BASE_ADDRESS) 302 md_offset = DMAP_BASE_ADDRESS; 303 #else /* BOOKE */ 304 md_offset = VM_MIN_KERNEL_ADDRESS - kernload; 305 #endif 306 307 preload_metadata = mdp; 308 if (md_offset > 0) { 309 preload_metadata += md_offset; 310 preload_bootstrap_relocate(md_offset); 311 } 312 kmdp = preload_search_by_type("elf kernel"); 313 if (kmdp != NULL) { 314 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 315 envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 316 if (envp != NULL) 317 envp += md_offset; 318 init_static_kenv(envp, 0); 319 if (fdt == 0) { 320 fdt = MD_FETCH(kmdp, MODINFOMD_DTBP, uintptr_t); 321 if (fdt != 0) 322 fdt += md_offset; 323 } 324 kernelendphys = MD_FETCH(kmdp, MODINFOMD_KERNEND, 325 vm_offset_t); 326 if (kernelendphys != 0) 327 kernelendphys += md_offset; 328 endkernel = ulmax(endkernel, kernelendphys); 329 #ifdef DDB 330 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 331 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 332 db_fetch_ksymtab(ksym_start, ksym_end); 333 #endif 334 } 335 } else { 336 init_static_kenv(init_kenv, sizeof(init_kenv)); 337 ofw_bootargs = true; 338 } 339 /* Store boot environment state */ 340 OF_initial_setup((void *)fdt, NULL, (int (*)(void *))ofentry); 341 342 /* 343 * Init params/tunables that can be overridden by the loader 344 */ 345 init_param1(); 346 347 /* 348 * Start initializing proc0 and thread0. 349 */ 350 proc_linkup0(&proc0, &thread0); 351 thread0.td_frame = &frame0; 352 #ifdef __powerpc64__ 353 __asm __volatile("mr 13,%0" :: "r"(&thread0)); 354 #else 355 __asm __volatile("mr 2,%0" :: "r"(&thread0)); 356 #endif 357 358 /* 359 * Init mutexes, which we use heavily in PMAP 360 */ 361 mutex_init(); 362 363 /* 364 * Install the OF client interface 365 */ 366 OF_bootstrap(); 367 368 if (ofw_bootargs) 369 ofw_parse_bootargs(); 370 371 /* 372 * Initialize the console before printing anything. 373 */ 374 cninit(); 375 376 #ifdef AIM 377 aim_cpu_init(toc); 378 #else /* BOOKE */ 379 booke_cpu_init(); 380 381 /* Make sure the kernel icache is valid before we go too much further */ 382 __syncicache((caddr_t)startkernel, endkernel - startkernel); 383 #endif 384 385 /* 386 * Choose a platform module so we can get the physical memory map. 387 */ 388 389 platform_probe_and_attach(); 390 391 /* 392 * Set up per-cpu data for the BSP now that the platform can tell 393 * us which that is. 394 */ 395 if (platform_smp_get_bsp(&bsp) != 0) 396 bsp.cr_cpuid = 0; 397 pc = &__pcpu[bsp.cr_cpuid]; 398 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 399 pcpu_init(pc, bsp.cr_cpuid, sizeof(struct pcpu)); 400 pc->pc_curthread = &thread0; 401 thread0.td_oncpu = bsp.cr_cpuid; 402 pc->pc_cpuid = bsp.cr_cpuid; 403 pc->pc_hwref = bsp.cr_hwref; 404 405 /* 406 * Init KDB 407 */ 408 kdb_init(); 409 410 /* 411 * Bring up MMU 412 */ 413 pmap_bootstrap(startkernel, endkernel); 414 mtmsr(psl_kernset & ~PSL_EE); 415 416 /* 417 * Initialize params/tunables that are derived from memsize 418 */ 419 init_param2(physmem); 420 421 /* 422 * Grab booted kernel's name 423 */ 424 env = kern_getenv("kernelname"); 425 if (env != NULL) { 426 strlcpy(kernelname, env, sizeof(kernelname)); 427 freeenv(env); 428 } 429 430 /* 431 * Finish setting up thread0. 432 */ 433 thread0.td_pcb = (struct pcb *) 434 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 435 sizeof(struct pcb)) & ~15UL); 436 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 437 pc->pc_curpcb = thread0.td_pcb; 438 439 /* Initialise the message buffer. */ 440 msgbufinit(msgbufp, msgbufsize); 441 442 #ifdef KDB 443 if (boothowto & RB_KDB) 444 kdb_enter(KDB_WHY_BOOTFLAGS, 445 "Boot flags requested debugger"); 446 #endif 447 448 return (((uintptr_t)thread0.td_pcb - 449 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 450 } 451 452 /* 453 * Flush the D-cache for non-DMA I/O so that the I-cache can 454 * be made coherent later. 455 */ 456 void 457 cpu_flush_dcache(void *ptr, size_t len) 458 { 459 register_t addr, off; 460 461 /* 462 * Align the address to a cacheline and adjust the length 463 * accordingly. Then round the length to a multiple of the 464 * cacheline for easy looping. 465 */ 466 addr = (uintptr_t)ptr; 467 off = addr & (cacheline_size - 1); 468 addr -= off; 469 len = roundup2(len + off, cacheline_size); 470 471 while (len > 0) { 472 __asm __volatile ("dcbf 0,%0" :: "r"(addr)); 473 __asm __volatile ("sync"); 474 addr += cacheline_size; 475 len -= cacheline_size; 476 } 477 } 478 479 int 480 ptrace_set_pc(struct thread *td, unsigned long addr) 481 { 482 struct trapframe *tf; 483 484 tf = td->td_frame; 485 tf->srr0 = (register_t)addr; 486 487 return (0); 488 } 489 490 void 491 spinlock_enter(void) 492 { 493 struct thread *td; 494 register_t msr; 495 496 td = curthread; 497 if (td->td_md.md_spinlock_count == 0) { 498 nop_prio_mhigh(); 499 msr = intr_disable(); 500 td->td_md.md_spinlock_count = 1; 501 td->td_md.md_saved_msr = msr; 502 critical_enter(); 503 } else 504 td->td_md.md_spinlock_count++; 505 } 506 507 void 508 spinlock_exit(void) 509 { 510 struct thread *td; 511 register_t msr; 512 513 td = curthread; 514 msr = td->td_md.md_saved_msr; 515 td->td_md.md_spinlock_count--; 516 if (td->td_md.md_spinlock_count == 0) { 517 critical_exit(); 518 intr_restore(msr); 519 nop_prio_medium(); 520 } 521 } 522 523 /* 524 * Simple ddb(4) command/hack to view any SPR on the running CPU. 525 * Uses a trivial asm function to perform the mfspr, and rewrites the mfspr 526 * instruction each time. 527 * XXX: Since it uses code modification, it won't work if the kernel code pages 528 * are marked RO. 529 */ 530 extern register_t get_spr(int); 531 532 #ifdef DDB 533 DB_SHOW_COMMAND(spr, db_show_spr) 534 { 535 register_t spr; 536 volatile uint32_t *p; 537 int sprno, saved_sprno; 538 539 if (!have_addr) 540 return; 541 542 saved_sprno = sprno = (intptr_t) addr; 543 sprno = ((sprno & 0x3e0) >> 5) | ((sprno & 0x1f) << 5); 544 p = (uint32_t *)(void *)&get_spr; 545 #ifdef __powerpc64__ 546 #if defined(_CALL_ELF) && _CALL_ELF == 2 547 /* Account for ELFv2 function prologue. */ 548 p += 2; 549 #else 550 p = *(volatile uint32_t * volatile *)p; 551 #endif 552 #endif 553 *p = (*p & ~0x001ff800) | (sprno << 11); 554 __syncicache(__DEVOLATILE(uint32_t *, p), cacheline_size); 555 spr = get_spr(sprno); 556 557 db_printf("SPR %d(%x): %lx\n", saved_sprno, saved_sprno, 558 (unsigned long)spr); 559 } 560 561 DB_SHOW_COMMAND(frame, db_show_frame) 562 { 563 struct trapframe *tf; 564 long reg; 565 int i; 566 567 tf = have_addr ? (struct trapframe *)addr : curthread->td_frame; 568 569 /* 570 * Everything casts through long to simplify the printing. 571 * 'long' is native register size anyway. 572 */ 573 db_printf("trap frame %p\n", tf); 574 for (i = 0; i < nitems(tf->fixreg); i++) { 575 reg = tf->fixreg[i]; 576 db_printf(" r%d:\t%#lx (%ld)\n", i, reg, reg); 577 } 578 reg = tf->lr; 579 db_printf(" lr:\t%#lx\n", reg); 580 reg = tf->cr; 581 db_printf(" cr:\t%#lx\n", reg); 582 reg = tf->xer; 583 db_printf(" xer:\t%#lx\n", reg); 584 reg = tf->ctr; 585 db_printf(" ctr:\t%#lx (%ld)\n", reg, reg); 586 reg = tf->srr0; 587 db_printf(" srr0:\t%#lx\n", reg); 588 reg = tf->srr1; 589 db_printf(" srr1:\t%#lx\n", reg); 590 reg = tf->exc; 591 db_printf(" exc:\t%#lx\n", reg); 592 reg = tf->dar; 593 db_printf(" dar:\t%#lx\n", reg); 594 #ifdef AIM 595 reg = tf->cpu.aim.dsisr; 596 db_printf(" dsisr:\t%#lx\n", reg); 597 #else 598 reg = tf->cpu.booke.esr; 599 db_printf(" esr:\t%#lx\n", reg); 600 reg = tf->cpu.booke.dbcr0; 601 db_printf(" dbcr0:\t%#lx\n", reg); 602 #endif 603 } 604 #endif 605 606 #undef bzero 607 void 608 bzero(void *buf, size_t len) 609 { 610 caddr_t p; 611 612 p = buf; 613 614 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 615 *p++ = 0; 616 len--; 617 } 618 619 while (len >= sizeof(u_long) * 8) { 620 *(u_long*) p = 0; 621 *((u_long*) p + 1) = 0; 622 *((u_long*) p + 2) = 0; 623 *((u_long*) p + 3) = 0; 624 len -= sizeof(u_long) * 8; 625 *((u_long*) p + 4) = 0; 626 *((u_long*) p + 5) = 0; 627 *((u_long*) p + 6) = 0; 628 *((u_long*) p + 7) = 0; 629 p += sizeof(u_long) * 8; 630 } 631 632 while (len >= sizeof(u_long)) { 633 *(u_long*) p = 0; 634 len -= sizeof(u_long); 635 p += sizeof(u_long); 636 } 637 638 while (len) { 639 *p++ = 0; 640 len--; 641 } 642 } 643 644 /* __stack_chk_fail_local() is called in secure-plt (32-bit). */ 645 #if !defined(__powerpc64__) 646 extern void __stack_chk_fail(void); 647 void __stack_chk_fail_local(void); 648 649 void 650 __stack_chk_fail_local(void) 651 { 652 653 __stack_chk_fail(); 654 } 655 #endif 656