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_map.h> 104 #include <vm/vm_object.h> 105 #include <vm/vm_pager.h> 106 107 #include <machine/altivec.h> 108 #ifndef __powerpc64__ 109 #include <machine/bat.h> 110 #endif 111 #include <machine/cpu.h> 112 #include <machine/elf.h> 113 #include <machine/fpu.h> 114 #include <machine/hid.h> 115 #include <machine/kdb.h> 116 #include <machine/md_var.h> 117 #include <machine/metadata.h> 118 #include <machine/mmuvar.h> 119 #include <machine/pcb.h> 120 #include <machine/reg.h> 121 #include <machine/sigframe.h> 122 #include <machine/spr.h> 123 #include <machine/trap.h> 124 #include <machine/vmparam.h> 125 #include <machine/ofw_machdep.h> 126 127 #include <ddb/ddb.h> 128 129 #include <dev/ofw/openfirm.h> 130 #include <dev/ofw/ofw_subr.h> 131 132 int cold = 1; 133 #ifdef __powerpc64__ 134 int cacheline_size = 128; 135 #else 136 int cacheline_size = 32; 137 #endif 138 int hw_direct_map = 1; 139 140 extern void *ap_pcpu; 141 142 struct pcpu __pcpu[MAXCPU]; 143 static char init_kenv[2048]; 144 145 static struct trapframe frame0; 146 147 char machine[] = "powerpc"; 148 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 149 150 static void cpu_startup(void *); 151 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 152 153 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 154 CTLFLAG_RD, &cacheline_size, 0, ""); 155 156 uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *, 157 uint32_t); 158 159 long Maxmem = 0; 160 long realmem = 0; 161 162 /* Default MSR values set in the AIM/Book-E early startup code */ 163 register_t psl_kernset; 164 register_t psl_userset; 165 register_t psl_userstatic; 166 #ifdef __powerpc64__ 167 register_t psl_userset32; 168 #endif 169 170 struct kva_md_info kmi; 171 172 static void 173 cpu_startup(void *dummy) 174 { 175 176 /* 177 * Initialise the decrementer-based clock. 178 */ 179 decr_init(); 180 181 /* 182 * Good {morning,afternoon,evening,night}. 183 */ 184 cpu_setup(PCPU_GET(cpuid)); 185 186 #ifdef PERFMON 187 perfmon_init(); 188 #endif 189 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)physmem), 190 ptoa((uintmax_t)physmem) / 1048576); 191 realmem = physmem; 192 193 if (bootverbose) 194 printf("available KVA = %zu (%zu MB)\n", 195 virtual_end - virtual_avail, 196 (virtual_end - virtual_avail) / 1048576); 197 198 /* 199 * Display any holes after the first chunk of extended memory. 200 */ 201 if (bootverbose) { 202 int indx; 203 204 printf("Physical memory chunk(s):\n"); 205 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 206 vm_paddr_t size1 = 207 phys_avail[indx + 1] - phys_avail[indx]; 208 209 #ifdef __powerpc64__ 210 printf("0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n", 211 #else 212 printf("0x%09jx - 0x%09jx, %ju bytes (%ju pages)\n", 213 #endif 214 (uintmax_t)phys_avail[indx], 215 (uintmax_t)phys_avail[indx + 1] - 1, 216 (uintmax_t)size1, (uintmax_t)size1 / PAGE_SIZE); 217 } 218 } 219 220 vm_ksubmap_init(&kmi); 221 222 printf("avail memory = %ju (%ju MB)\n", 223 ptoa((uintmax_t)vm_free_count()), 224 ptoa((uintmax_t)vm_free_count()) / 1048576); 225 226 /* 227 * Set up buffers, so they can be used to read disk labels. 228 */ 229 bufinit(); 230 vm_pager_bufferinit(); 231 } 232 233 extern vm_offset_t __startkernel, __endkernel; 234 extern unsigned char __bss_start[]; 235 extern unsigned char __sbss_start[]; 236 extern unsigned char __sbss_end[]; 237 extern unsigned char _end[]; 238 239 void aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, 240 void *mdp, uint32_t mdp_cookie); 241 void aim_cpu_init(vm_offset_t toc); 242 void booke_cpu_init(void); 243 244 uintptr_t 245 powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp, 246 uint32_t mdp_cookie) 247 { 248 struct pcpu *pc; 249 struct cpuref bsp; 250 vm_offset_t startkernel, endkernel; 251 char *env; 252 bool ofw_bootargs = false; 253 #ifdef DDB 254 vm_offset_t ksym_start; 255 vm_offset_t ksym_end; 256 #endif 257 258 /* First guess at start/end kernel positions */ 259 startkernel = __startkernel; 260 endkernel = __endkernel; 261 262 /* 263 * If the metadata pointer cookie is not set to the magic value, 264 * the number in mdp should be treated as nonsense. 265 */ 266 if (mdp_cookie != 0xfb5d104d) 267 mdp = NULL; 268 269 #if !defined(BOOKE) 270 /* 271 * On BOOKE the BSS is already cleared and some variables 272 * initialized. Do not wipe them out. 273 */ 274 bzero(__sbss_start, __sbss_end - __sbss_start); 275 bzero(__bss_start, _end - __bss_start); 276 #endif 277 278 cpu_feature_setup(); 279 280 #ifdef AIM 281 aim_early_init(fdt, toc, ofentry, mdp, mdp_cookie); 282 #endif 283 284 /* 285 * Parse metadata if present and fetch parameters. Must be done 286 * before console is inited so cninit gets the right value of 287 * boothowto. 288 */ 289 if (mdp != NULL) { 290 void *kmdp = NULL; 291 char *envp = NULL; 292 uintptr_t md_offset = 0; 293 vm_paddr_t kernelendphys; 294 295 #ifdef AIM 296 if ((uintptr_t)&powerpc_init > DMAP_BASE_ADDRESS) 297 md_offset = DMAP_BASE_ADDRESS; 298 #endif 299 300 preload_metadata = mdp; 301 if (md_offset > 0) { 302 preload_metadata += md_offset; 303 preload_bootstrap_relocate(md_offset); 304 } 305 kmdp = preload_search_by_type("elf kernel"); 306 if (kmdp != NULL) { 307 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 308 envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 309 if (envp != NULL) 310 envp += md_offset; 311 init_static_kenv(envp, 0); 312 kernelendphys = MD_FETCH(kmdp, MODINFOMD_KERNEND, 313 vm_offset_t); 314 if (kernelendphys != 0) 315 kernelendphys += md_offset; 316 endkernel = ulmax(endkernel, kernelendphys); 317 #ifdef DDB 318 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 319 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 320 db_fetch_ksymtab(ksym_start, ksym_end); 321 #endif 322 } 323 } else { 324 init_static_kenv(init_kenv, sizeof(init_kenv)); 325 ofw_bootargs = true; 326 } 327 /* Store boot environment state */ 328 OF_initial_setup((void *)fdt, NULL, (int (*)(void *))ofentry); 329 330 /* 331 * Init params/tunables that can be overridden by the loader 332 */ 333 init_param1(); 334 335 /* 336 * Start initializing proc0 and thread0. 337 */ 338 proc_linkup0(&proc0, &thread0); 339 thread0.td_frame = &frame0; 340 #ifdef __powerpc64__ 341 __asm __volatile("mr 13,%0" :: "r"(&thread0)); 342 #else 343 __asm __volatile("mr 2,%0" :: "r"(&thread0)); 344 #endif 345 346 /* 347 * Init mutexes, which we use heavily in PMAP 348 */ 349 mutex_init(); 350 351 /* 352 * Install the OF client interface 353 */ 354 OF_bootstrap(); 355 356 if (ofw_bootargs) 357 ofw_parse_bootargs(); 358 359 /* 360 * Initialize the console before printing anything. 361 */ 362 cninit(); 363 364 #ifdef AIM 365 aim_cpu_init(toc); 366 #else /* BOOKE */ 367 booke_cpu_init(); 368 369 /* Make sure the kernel icache is valid before we go too much further */ 370 __syncicache((caddr_t)startkernel, endkernel - startkernel); 371 #endif 372 373 /* 374 * Choose a platform module so we can get the physical memory map. 375 */ 376 377 platform_probe_and_attach(); 378 379 /* 380 * Set up per-cpu data for the BSP now that the platform can tell 381 * us which that is. 382 */ 383 if (platform_smp_get_bsp(&bsp) != 0) 384 bsp.cr_cpuid = 0; 385 pc = &__pcpu[bsp.cr_cpuid]; 386 pcpu_init(pc, bsp.cr_cpuid, sizeof(struct pcpu)); 387 pc->pc_curthread = &thread0; 388 thread0.td_oncpu = bsp.cr_cpuid; 389 pc->pc_cpuid = bsp.cr_cpuid; 390 pc->pc_hwref = bsp.cr_hwref; 391 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 392 393 /* 394 * Init KDB 395 */ 396 kdb_init(); 397 398 /* 399 * Bring up MMU 400 */ 401 pmap_bootstrap(startkernel, endkernel); 402 mtmsr(psl_kernset & ~PSL_EE); 403 404 /* 405 * Initialize params/tunables that are derived from memsize 406 */ 407 init_param2(physmem); 408 409 /* 410 * Grab booted kernel's name 411 */ 412 env = kern_getenv("kernelname"); 413 if (env != NULL) { 414 strlcpy(kernelname, env, sizeof(kernelname)); 415 freeenv(env); 416 } 417 418 /* 419 * Finish setting up thread0. 420 */ 421 thread0.td_pcb = (struct pcb *) 422 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 423 sizeof(struct pcb)) & ~15UL); 424 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 425 pc->pc_curpcb = thread0.td_pcb; 426 427 /* Initialise the message buffer. */ 428 msgbufinit(msgbufp, msgbufsize); 429 430 #ifdef KDB 431 if (boothowto & RB_KDB) 432 kdb_enter(KDB_WHY_BOOTFLAGS, 433 "Boot flags requested debugger"); 434 #endif 435 436 return (((uintptr_t)thread0.td_pcb - 437 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 438 } 439 440 /* 441 * Flush the D-cache for non-DMA I/O so that the I-cache can 442 * be made coherent later. 443 */ 444 void 445 cpu_flush_dcache(void *ptr, size_t len) 446 { 447 register_t addr, off; 448 449 /* 450 * Align the address to a cacheline and adjust the length 451 * accordingly. Then round the length to a multiple of the 452 * cacheline for easy looping. 453 */ 454 addr = (uintptr_t)ptr; 455 off = addr & (cacheline_size - 1); 456 addr -= off; 457 len = roundup2(len + off, cacheline_size); 458 459 while (len > 0) { 460 __asm __volatile ("dcbf 0,%0" :: "r"(addr)); 461 __asm __volatile ("sync"); 462 addr += cacheline_size; 463 len -= cacheline_size; 464 } 465 } 466 467 int 468 ptrace_set_pc(struct thread *td, unsigned long addr) 469 { 470 struct trapframe *tf; 471 472 tf = td->td_frame; 473 tf->srr0 = (register_t)addr; 474 475 return (0); 476 } 477 478 void 479 spinlock_enter(void) 480 { 481 struct thread *td; 482 register_t msr; 483 484 td = curthread; 485 if (td->td_md.md_spinlock_count == 0) { 486 __asm __volatile("or 2,2,2"); /* Set high thread priority */ 487 msr = intr_disable(); 488 td->td_md.md_spinlock_count = 1; 489 td->td_md.md_saved_msr = msr; 490 } else 491 td->td_md.md_spinlock_count++; 492 critical_enter(); 493 } 494 495 void 496 spinlock_exit(void) 497 { 498 struct thread *td; 499 register_t msr; 500 501 td = curthread; 502 critical_exit(); 503 msr = td->td_md.md_saved_msr; 504 td->td_md.md_spinlock_count--; 505 if (td->td_md.md_spinlock_count == 0) { 506 intr_restore(msr); 507 __asm __volatile("or 6,6,6"); /* Set normal thread priority */ 508 } 509 } 510 511 /* 512 * Simple ddb(4) command/hack to view any SPR on the running CPU. 513 * Uses a trivial asm function to perform the mfspr, and rewrites the mfspr 514 * instruction each time. 515 * XXX: Since it uses code modification, it won't work if the kernel code pages 516 * are marked RO. 517 */ 518 extern register_t get_spr(int); 519 520 #ifdef DDB 521 DB_SHOW_COMMAND(spr, db_show_spr) 522 { 523 register_t spr; 524 volatile uint32_t *p; 525 int sprno, saved_sprno; 526 527 if (!have_addr) 528 return; 529 530 saved_sprno = sprno = (intptr_t) addr; 531 sprno = ((sprno & 0x3e0) >> 5) | ((sprno & 0x1f) << 5); 532 p = (uint32_t *)(void *)&get_spr; 533 *p = (*p & ~0x001ff800) | (sprno << 11); 534 __syncicache(get_spr, cacheline_size); 535 spr = get_spr(sprno); 536 537 db_printf("SPR %d(%x): %lx\n", saved_sprno, saved_sprno, 538 (unsigned long)spr); 539 } 540 #endif 541 542 #undef bzero 543 void 544 bzero(void *buf, size_t len) 545 { 546 caddr_t p; 547 548 p = buf; 549 550 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 551 *p++ = 0; 552 len--; 553 } 554 555 while (len >= sizeof(u_long) * 8) { 556 *(u_long*) p = 0; 557 *((u_long*) p + 1) = 0; 558 *((u_long*) p + 2) = 0; 559 *((u_long*) p + 3) = 0; 560 len -= sizeof(u_long) * 8; 561 *((u_long*) p + 4) = 0; 562 *((u_long*) p + 5) = 0; 563 *((u_long*) p + 6) = 0; 564 *((u_long*) p + 7) = 0; 565 p += sizeof(u_long) * 8; 566 } 567 568 while (len >= sizeof(u_long)) { 569 *(u_long*) p = 0; 570 len -= sizeof(u_long); 571 p += sizeof(u_long); 572 } 573 574 while (len) { 575 *p++ = 0; 576 len--; 577 } 578 } 579