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 = %ld (%ld MB)\n", ptoa(physmem), 180 ptoa(physmem) / 1048576); 181 realmem = physmem; 182 183 if (bootverbose) 184 printf("available KVA = %zd (%zd 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_offset_t size1 = 197 phys_avail[indx + 1] - phys_avail[indx]; 198 199 #ifdef __powerpc64__ 200 printf("0x%016lx - 0x%016lx, %ld bytes (%ld pages)\n", 201 #else 202 printf("0x%08x - 0x%08x, %d bytes (%ld pages)\n", 203 #endif 204 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 205 size1 / PAGE_SIZE); 206 } 207 } 208 209 vm_ksubmap_init(&kmi); 210 211 printf("avail memory = %ld (%ld MB)\n", ptoa(vm_cnt.v_free_count), 212 ptoa(vm_cnt.v_free_count) / 1048576); 213 214 /* 215 * Set up buffers, so they can be used to read disk labels. 216 */ 217 bufinit(); 218 vm_pager_bufferinit(); 219 } 220 221 extern vm_offset_t __startkernel, __endkernel; 222 extern unsigned char __bss_start[]; 223 extern unsigned char __sbss_start[]; 224 extern unsigned char __sbss_end[]; 225 extern unsigned char _end[]; 226 227 void aim_cpu_init(vm_offset_t toc); 228 void booke_cpu_init(void); 229 230 uintptr_t 231 powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp) 232 { 233 struct pcpu *pc; 234 vm_offset_t startkernel, endkernel; 235 void *kmdp; 236 char *env; 237 #ifdef DDB 238 vm_offset_t ksym_start; 239 vm_offset_t ksym_end; 240 #endif 241 242 kmdp = NULL; 243 244 /* First guess at start/end kernel positions */ 245 startkernel = __startkernel; 246 endkernel = __endkernel; 247 248 /* Check for ePAPR loader, which puts a magic value into r6 */ 249 if (mdp == (void *)0x65504150) 250 mdp = NULL; 251 252 /* 253 * Parse metadata if present and fetch parameters. Must be done 254 * before console is inited so cninit gets the right value of 255 * boothowto. 256 */ 257 if (mdp != NULL) { 258 preload_metadata = mdp; 259 kmdp = preload_search_by_type("elf kernel"); 260 if (kmdp != NULL) { 261 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 262 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 263 endkernel = ulmax(endkernel, MD_FETCH(kmdp, 264 MODINFOMD_KERNEND, vm_offset_t)); 265 #ifdef DDB 266 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 267 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 268 db_fetch_ksymtab(ksym_start, ksym_end); 269 #endif 270 } 271 } else { 272 bzero(__sbss_start, __sbss_end - __sbss_start); 273 bzero(__bss_start, _end - __bss_start); 274 } 275 #ifdef BOOKE 276 tlb1_init(); 277 #endif 278 279 /* Store boot environment state */ 280 OF_initial_setup((void *)fdt, NULL, (int (*)(void *))ofentry); 281 282 /* 283 * Init params/tunables that can be overridden by the loader 284 */ 285 init_param1(); 286 287 /* 288 * Start initializing proc0 and thread0. 289 */ 290 proc_linkup0(&proc0, &thread0); 291 thread0.td_frame = &frame0; 292 293 /* 294 * Set up per-cpu data. 295 */ 296 pc = __pcpu; 297 pcpu_init(pc, 0, sizeof(struct pcpu)); 298 pc->pc_curthread = &thread0; 299 #ifdef __powerpc64__ 300 __asm __volatile("mr 13,%0" :: "r"(pc->pc_curthread)); 301 #else 302 __asm __volatile("mr 2,%0" :: "r"(pc->pc_curthread)); 303 #endif 304 pc->pc_cpuid = 0; 305 306 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 307 308 /* 309 * Init mutexes, which we use heavily in PMAP 310 */ 311 312 mutex_init(); 313 314 /* 315 * Install the OF client interface 316 */ 317 318 OF_bootstrap(); 319 320 /* 321 * Initialize the console before printing anything. 322 */ 323 cninit(); 324 325 /* 326 * Complain if there is no metadata. 327 */ 328 if (mdp == NULL || kmdp == NULL) { 329 printf("powerpc_init: no loader metadata.\n"); 330 } 331 332 /* 333 * Init KDB 334 */ 335 336 kdb_init(); 337 338 #ifdef AIM 339 aim_cpu_init(toc); 340 #else /* BOOKE */ 341 booke_cpu_init(); 342 343 /* Make sure the kernel icache is valid before we go too much further */ 344 __syncicache((caddr_t)startkernel, endkernel - startkernel); 345 #endif 346 347 /* 348 * Choose a platform module so we can get the physical memory map. 349 */ 350 351 platform_probe_and_attach(); 352 353 /* 354 * Bring up MMU 355 */ 356 pmap_bootstrap(startkernel, endkernel); 357 mtmsr(PSL_KERNSET & ~PSL_EE); 358 359 /* 360 * Initialize params/tunables that are derived from memsize 361 */ 362 init_param2(physmem); 363 364 /* 365 * Grab booted kernel's name 366 */ 367 env = kern_getenv("kernelname"); 368 if (env != NULL) { 369 strlcpy(kernelname, env, sizeof(kernelname)); 370 freeenv(env); 371 } 372 373 /* 374 * Finish setting up thread0. 375 */ 376 thread0.td_pcb = (struct pcb *) 377 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 378 sizeof(struct pcb)) & ~15UL); 379 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 380 pc->pc_curpcb = thread0.td_pcb; 381 382 /* Initialise the message buffer. */ 383 msgbufinit(msgbufp, msgbufsize); 384 385 #ifdef KDB 386 if (boothowto & RB_KDB) 387 kdb_enter(KDB_WHY_BOOTFLAGS, 388 "Boot flags requested debugger"); 389 #endif 390 391 return (((uintptr_t)thread0.td_pcb - 392 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 393 } 394 395 void 396 bzero(void *buf, size_t len) 397 { 398 caddr_t p; 399 400 p = buf; 401 402 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 403 *p++ = 0; 404 len--; 405 } 406 407 while (len >= sizeof(u_long) * 8) { 408 *(u_long*) p = 0; 409 *((u_long*) p + 1) = 0; 410 *((u_long*) p + 2) = 0; 411 *((u_long*) p + 3) = 0; 412 len -= sizeof(u_long) * 8; 413 *((u_long*) p + 4) = 0; 414 *((u_long*) p + 5) = 0; 415 *((u_long*) p + 6) = 0; 416 *((u_long*) p + 7) = 0; 417 p += sizeof(u_long) * 8; 418 } 419 420 while (len >= sizeof(u_long)) { 421 *(u_long*) p = 0; 422 len -= sizeof(u_long); 423 p += sizeof(u_long); 424 } 425 426 while (len) { 427 *p++ = 0; 428 len--; 429 } 430 } 431 432 /* 433 * Flush the D-cache for non-DMA I/O so that the I-cache can 434 * be made coherent later. 435 */ 436 void 437 cpu_flush_dcache(void *ptr, size_t len) 438 { 439 register_t addr, off; 440 441 /* 442 * Align the address to a cacheline and adjust the length 443 * accordingly. Then round the length to a multiple of the 444 * cacheline for easy looping. 445 */ 446 addr = (uintptr_t)ptr; 447 off = addr & (cacheline_size - 1); 448 addr -= off; 449 len = (len + off + cacheline_size - 1) & ~(cacheline_size - 1); 450 451 while (len > 0) { 452 __asm __volatile ("dcbf 0,%0" :: "r"(addr)); 453 __asm __volatile ("sync"); 454 addr += cacheline_size; 455 len -= cacheline_size; 456 } 457 } 458 459 int 460 ptrace_set_pc(struct thread *td, unsigned long addr) 461 { 462 struct trapframe *tf; 463 464 tf = td->td_frame; 465 tf->srr0 = (register_t)addr; 466 467 return (0); 468 } 469 470 void 471 spinlock_enter(void) 472 { 473 struct thread *td; 474 register_t msr; 475 476 td = curthread; 477 if (td->td_md.md_spinlock_count == 0) { 478 __asm __volatile("or 2,2,2"); /* Set high thread priority */ 479 msr = intr_disable(); 480 td->td_md.md_spinlock_count = 1; 481 td->td_md.md_saved_msr = msr; 482 } else 483 td->td_md.md_spinlock_count++; 484 critical_enter(); 485 } 486 487 void 488 spinlock_exit(void) 489 { 490 struct thread *td; 491 register_t msr; 492 493 td = curthread; 494 critical_exit(); 495 msr = td->td_md.md_saved_msr; 496 td->td_md.md_spinlock_count--; 497 if (td->td_md.md_spinlock_count == 0) { 498 intr_restore(msr); 499 __asm __volatile("or 6,6,6"); /* Set normal thread priority */ 500 } 501 } 502 503