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_compat.h" 61 #include "opt_ddb.h" 62 #include "opt_kstack_pages.h" 63 #include "opt_platform.h" 64 65 #include <sys/param.h> 66 #include <sys/proc.h> 67 #include <sys/systm.h> 68 #include <sys/bio.h> 69 #include <sys/buf.h> 70 #include <sys/bus.h> 71 #include <sys/cons.h> 72 #include <sys/cpu.h> 73 #include <sys/eventhandler.h> 74 #include <sys/exec.h> 75 #include <sys/imgact.h> 76 #include <sys/kdb.h> 77 #include <sys/kernel.h> 78 #include <sys/ktr.h> 79 #include <sys/linker.h> 80 #include <sys/lock.h> 81 #include <sys/malloc.h> 82 #include <sys/mbuf.h> 83 #include <sys/msgbuf.h> 84 #include <sys/mutex.h> 85 #include <sys/ptrace.h> 86 #include <sys/reboot.h> 87 #include <sys/rwlock.h> 88 #include <sys/signalvar.h> 89 #include <sys/syscallsubr.h> 90 #include <sys/sysctl.h> 91 #include <sys/sysent.h> 92 #include <sys/sysproto.h> 93 #include <sys/ucontext.h> 94 #include <sys/uio.h> 95 #include <sys/vmmeter.h> 96 #include <sys/vnode.h> 97 98 #include <net/netisr.h> 99 100 #include <vm/vm.h> 101 #include <vm/vm_extern.h> 102 #include <vm/vm_kern.h> 103 #include <vm/vm_page.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> 131 132 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]; 143 144 static struct trapframe frame0; 145 146 char machine[] = "powerpc"; 147 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 148 149 static void cpu_startup(void *); 150 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 151 152 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 153 CTLFLAG_RD, &cacheline_size, 0, ""); 154 155 uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *); 156 157 long Maxmem = 0; 158 long realmem = 0; 159 160 struct kva_md_info kmi; 161 162 static void 163 cpu_startup(void *dummy) 164 { 165 166 /* 167 * Initialise the decrementer-based clock. 168 */ 169 decr_init(); 170 171 /* 172 * Good {morning,afternoon,evening,night}. 173 */ 174 cpu_setup(PCPU_GET(cpuid)); 175 176 #ifdef PERFMON 177 perfmon_init(); 178 #endif 179 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)physmem), 180 ptoa((uintmax_t)physmem) / 1048576); 181 realmem = physmem; 182 183 if (bootverbose) 184 printf("available KVA = %zu (%zu MB)\n", 185 virtual_end - virtual_avail, 186 (virtual_end - virtual_avail) / 1048576); 187 188 /* 189 * Display any holes after the first chunk of extended memory. 190 */ 191 if (bootverbose) { 192 int indx; 193 194 printf("Physical memory chunk(s):\n"); 195 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 196 vm_paddr_t size1 = 197 phys_avail[indx + 1] - phys_avail[indx]; 198 199 #ifdef __powerpc64__ 200 printf("0x%016jx - 0x%016jx, %jd bytes (%jd pages)\n", 201 #else 202 printf("0x%09jx - 0x%09jx, %ju bytes (%ju pages)\n", 203 #endif 204 (uintmax_t)phys_avail[indx], 205 (uintmax_t)phys_avail[indx + 1] - 1, 206 (uintmax_t)size1, (uintmax_t)size1 / PAGE_SIZE); 207 } 208 } 209 210 vm_ksubmap_init(&kmi); 211 212 printf("avail memory = %ju (%ju MB)\n", 213 ptoa((uintmax_t)vm_cnt.v_free_count), 214 ptoa((uintmax_t)vm_cnt.v_free_count) / 1048576); 215 216 /* 217 * Set up buffers, so they can be used to read disk labels. 218 */ 219 bufinit(); 220 vm_pager_bufferinit(); 221 } 222 223 extern vm_offset_t __startkernel, __endkernel; 224 extern unsigned char __bss_start[]; 225 extern unsigned char __sbss_start[]; 226 extern unsigned char __sbss_end[]; 227 extern unsigned char _end[]; 228 229 void aim_cpu_init(vm_offset_t toc); 230 void booke_cpu_init(void); 231 232 uintptr_t 233 powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp) 234 { 235 struct pcpu *pc; 236 vm_offset_t startkernel, endkernel; 237 void *kmdp; 238 char *env; 239 #ifdef DDB 240 vm_offset_t ksym_start; 241 vm_offset_t ksym_end; 242 #endif 243 244 kmdp = NULL; 245 246 /* First guess at start/end kernel positions */ 247 startkernel = __startkernel; 248 endkernel = __endkernel; 249 250 /* Check for ePAPR loader, which puts a magic value into r6 */ 251 if (mdp == (void *)0x65504150) 252 mdp = NULL; 253 254 /* 255 * Parse metadata if present and fetch parameters. Must be done 256 * before console is inited so cninit gets the right value of 257 * boothowto. 258 */ 259 if (mdp != NULL) { 260 preload_metadata = mdp; 261 kmdp = preload_search_by_type("elf kernel"); 262 if (kmdp != NULL) { 263 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 264 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 265 0); 266 endkernel = ulmax(endkernel, MD_FETCH(kmdp, 267 MODINFOMD_KERNEND, vm_offset_t)); 268 #ifdef DDB 269 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 270 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 271 db_fetch_ksymtab(ksym_start, ksym_end); 272 #endif 273 } 274 } else { 275 bzero(__sbss_start, __sbss_end - __sbss_start); 276 bzero(__bss_start, _end - __bss_start); 277 } 278 #ifdef BOOKE 279 tlb1_init(); 280 #endif 281 282 /* Store boot environment state */ 283 OF_initial_setup((void *)fdt, NULL, (int (*)(void *))ofentry); 284 285 /* 286 * Init params/tunables that can be overridden by the loader 287 */ 288 init_param1(); 289 290 /* 291 * Start initializing proc0 and thread0. 292 */ 293 proc_linkup0(&proc0, &thread0); 294 thread0.td_frame = &frame0; 295 296 /* 297 * Set up per-cpu data. 298 */ 299 pc = __pcpu; 300 pcpu_init(pc, 0, sizeof(struct pcpu)); 301 pc->pc_curthread = &thread0; 302 #ifdef __powerpc64__ 303 __asm __volatile("mr 13,%0" :: "r"(pc->pc_curthread)); 304 #else 305 __asm __volatile("mr 2,%0" :: "r"(pc->pc_curthread)); 306 #endif 307 pc->pc_cpuid = 0; 308 309 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 310 311 /* 312 * Init mutexes, which we use heavily in PMAP 313 */ 314 315 mutex_init(); 316 317 /* 318 * Install the OF client interface 319 */ 320 321 OF_bootstrap(); 322 323 /* 324 * Initialize the console before printing anything. 325 */ 326 cninit(); 327 328 /* 329 * Complain if there is no metadata. 330 */ 331 if (mdp == NULL || kmdp == NULL) { 332 printf("powerpc_init: no loader metadata.\n"); 333 } 334 335 /* 336 * Init KDB 337 */ 338 339 kdb_init(); 340 341 #ifdef AIM 342 aim_cpu_init(toc); 343 #else /* BOOKE */ 344 booke_cpu_init(); 345 346 /* Make sure the kernel icache is valid before we go too much further */ 347 __syncicache((caddr_t)startkernel, endkernel - startkernel); 348 #endif 349 350 /* 351 * Choose a platform module so we can get the physical memory map. 352 */ 353 354 platform_probe_and_attach(); 355 356 /* 357 * Bring up MMU 358 */ 359 pmap_bootstrap(startkernel, endkernel); 360 mtmsr(PSL_KERNSET & ~PSL_EE); 361 362 /* 363 * Initialize params/tunables that are derived from memsize 364 */ 365 init_param2(physmem); 366 367 /* 368 * Grab booted kernel's name 369 */ 370 env = kern_getenv("kernelname"); 371 if (env != NULL) { 372 strlcpy(kernelname, env, sizeof(kernelname)); 373 freeenv(env); 374 } 375 376 /* 377 * Finish setting up thread0. 378 */ 379 thread0.td_pcb = (struct pcb *) 380 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 381 sizeof(struct pcb)) & ~15UL); 382 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 383 pc->pc_curpcb = thread0.td_pcb; 384 385 /* Initialise the message buffer. */ 386 msgbufinit(msgbufp, msgbufsize); 387 388 #ifdef KDB 389 if (boothowto & RB_KDB) 390 kdb_enter(KDB_WHY_BOOTFLAGS, 391 "Boot flags requested debugger"); 392 #endif 393 394 return (((uintptr_t)thread0.td_pcb - 395 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 396 } 397 398 void 399 bzero(void *buf, size_t len) 400 { 401 caddr_t p; 402 403 p = buf; 404 405 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 406 *p++ = 0; 407 len--; 408 } 409 410 while (len >= sizeof(u_long) * 8) { 411 *(u_long*) p = 0; 412 *((u_long*) p + 1) = 0; 413 *((u_long*) p + 2) = 0; 414 *((u_long*) p + 3) = 0; 415 len -= sizeof(u_long) * 8; 416 *((u_long*) p + 4) = 0; 417 *((u_long*) p + 5) = 0; 418 *((u_long*) p + 6) = 0; 419 *((u_long*) p + 7) = 0; 420 p += sizeof(u_long) * 8; 421 } 422 423 while (len >= sizeof(u_long)) { 424 *(u_long*) p = 0; 425 len -= sizeof(u_long); 426 p += sizeof(u_long); 427 } 428 429 while (len) { 430 *p++ = 0; 431 len--; 432 } 433 } 434 435 /* 436 * Flush the D-cache for non-DMA I/O so that the I-cache can 437 * be made coherent later. 438 */ 439 void 440 cpu_flush_dcache(void *ptr, size_t len) 441 { 442 register_t addr, off; 443 444 /* 445 * Align the address to a cacheline and adjust the length 446 * accordingly. Then round the length to a multiple of the 447 * cacheline for easy looping. 448 */ 449 addr = (uintptr_t)ptr; 450 off = addr & (cacheline_size - 1); 451 addr -= off; 452 len = (len + off + cacheline_size - 1) & ~(cacheline_size - 1); 453 454 while (len > 0) { 455 __asm __volatile ("dcbf 0,%0" :: "r"(addr)); 456 __asm __volatile ("sync"); 457 addr += cacheline_size; 458 len -= cacheline_size; 459 } 460 } 461 462 int 463 ptrace_set_pc(struct thread *td, unsigned long addr) 464 { 465 struct trapframe *tf; 466 467 tf = td->td_frame; 468 tf->srr0 = (register_t)addr; 469 470 return (0); 471 } 472 473 void 474 spinlock_enter(void) 475 { 476 struct thread *td; 477 register_t msr; 478 479 td = curthread; 480 if (td->td_md.md_spinlock_count == 0) { 481 __asm __volatile("or 2,2,2"); /* Set high thread priority */ 482 msr = intr_disable(); 483 td->td_md.md_spinlock_count = 1; 484 td->td_md.md_saved_msr = msr; 485 } else 486 td->td_md.md_spinlock_count++; 487 critical_enter(); 488 } 489 490 void 491 spinlock_exit(void) 492 { 493 struct thread *td; 494 register_t msr; 495 496 td = curthread; 497 critical_exit(); 498 msr = td->td_md.md_saved_msr; 499 td->td_md.md_spinlock_count--; 500 if (td->td_md.md_spinlock_count == 0) { 501 intr_restore(msr); 502 __asm __volatile("or 6,6,6"); /* Set normal thread priority */ 503 } 504 } 505 506