1 /* $NetBSD: machdep.c,v 1.6 2026/02/24 21:41:59 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2024 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at Sandburst Corp. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 34 * Copyright (C) 1995, 1996 TooLs GmbH. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by TooLs GmbH. 48 * 4. The name of TooLs GmbH may not be used to endorse or promote products 49 * derived from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 57 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 58 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 59 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 60 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 */ 62 63 #define _POWERPC_BUS_DMA_PRIVATE 64 65 #include <sys/cdefs.h> 66 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.6 2026/02/24 21:41:59 jmcneill Exp $"); 67 68 #include "opt_compat_netbsd.h" 69 #include "opt_ddb.h" 70 #include "opt_ddbparam.h" 71 #include "opt_inet.h" 72 #include "opt_ns.h" 73 #include "opt_oea.h" 74 #include "opt_multiprocessor.h" 75 76 #include <sys/param.h> 77 #include <sys/buf.h> 78 #include <sys/bus.h> 79 #include <sys/conf.h> 80 #include <sys/device.h> 81 #include <sys/exec.h> 82 #include <sys/extent.h> 83 #include <sys/intr.h> 84 #include <sys/kernel.h> 85 #include <sys/kgdb.h> 86 #include <sys/ksyms.h> 87 #include <sys/mbuf.h> 88 #include <sys/mount.h> 89 #include <sys/msgbuf.h> 90 #include <sys/proc.h> 91 #include <sys/reboot.h> 92 #include <sys/syscallargs.h> 93 #include <sys/sysctl.h> 94 #include <sys/syslog.h> 95 #include <sys/systm.h> 96 #include <sys/cpu.h> 97 98 #include <uvm/uvm_extern.h> 99 100 #include <machine/powerpc.h> 101 #include <machine/wii.h> 102 #include <machine/wiiu.h> 103 #include <arch/evbppc/nintendo/dev/gecko.h> 104 #include <arch/evbppc/nintendo/pic_pi.h> 105 #include <arch/evbppc/nintendo/ipi_latte.h> 106 107 #include <powerpc/bus_funcs.h> 108 #include <powerpc/db_machdep.h> 109 #include <powerpc/pio.h> 110 #include <powerpc/pmap.h> 111 #include <powerpc/spr.h> 112 #include <powerpc/trap.h> 113 114 #include <powerpc/oea/bat.h> 115 #include <powerpc/oea/spr.h> 116 #include <powerpc/oea/hid.h> 117 #include <powerpc/pic/picvar.h> 118 119 #include <ddb/db_extern.h> 120 #include <ddb/db_active.h> 121 122 #include <dev/wscons/wsconsio.h> 123 #include <dev/wscons/wsdisplayvar.h> 124 #include <dev/rasops/rasops.h> 125 #include <dev/wsfont/wsfont.h> 126 #include <dev/wscons/wsdisplay_vconsvar.h> 127 128 #include <dev/usb/ukbdvar.h> 129 130 #include "ksyms.h" 131 #include "ukbd.h" 132 #include "genfb.h" 133 #include "gecko.h" 134 135 #ifndef WII_DEFAULT_CMDLINE 136 #define WII_DEFAULT_CMDLINE "root=ld0a" 137 #endif 138 139 #define IBM750CL_SPR_HID4 1011 140 141 #define MINI_MEM2_START 0x13f00000 /* Start of reserved MEM2 for MINI */ 142 143 #define PI_INTERRUPT_CAUSE 0x0c003000 144 #define RESET_SWITCH_STATE __BIT(16) 145 146 extern u_int l2cr_config; 147 148 struct powerpc_bus_space wii_mem_tag = { 149 .pbs_flags = _BUS_SPACE_BIG_ENDIAN | 150 _BUS_SPACE_MEM_TYPE, 151 }; 152 153 static char ex_storage[1][EXTENT_FIXED_STORAGE_SIZE(EXTMAP_RANGES)] 154 __attribute__((aligned(8))); 155 156 static bus_addr_t 157 wii_dma_phys_to_bus_mem(bus_dma_tag_t t, bus_addr_t addr) 158 { 159 return addr; 160 } 161 162 static bus_addr_t 163 wii_dma_bus_mem_to_phys(bus_dma_tag_t t, bus_addr_t addr) 164 { 165 return addr; 166 } 167 168 static int 169 wii_mem2_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 170 bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, 171 int flags) 172 { 173 struct mem_region *mem, *avail; 174 const int mem2_index = wiiu_native ? 2 : 1; 175 176 /* Restrict memory used for DMA to ranges in MEM2 */ 177 mem_regions(&mem, &avail); 178 if (mem[mem2_index].size == 0) { 179 return ENOMEM; 180 } 181 182 return _bus_dmamem_alloc_range(t, size, alignment, boundary, segs, 183 nsegs, rsegs, flags, mem[mem2_index].start, 184 mem[mem2_index].start + mem[mem2_index].size - PAGE_SIZE - 1); 185 } 186 187 struct powerpc_bus_dma_tag wii_bus_dma_tag = { 188 0, 0, /* _bounce_thresh_min/max */ 189 _bus_dmamap_create, 190 _bus_dmamap_destroy, 191 _bus_dmamap_load, 192 _bus_dmamap_load_mbuf, 193 _bus_dmamap_load_uio, 194 _bus_dmamap_load_raw, 195 _bus_dmamap_unload, 196 _bus_dmamap_sync, 197 _bus_dmamem_alloc, 198 _bus_dmamem_free, 199 _bus_dmamem_map, 200 _bus_dmamem_unmap, 201 _bus_dmamem_mmap, 202 wii_dma_phys_to_bus_mem, 203 wii_dma_bus_mem_to_phys, 204 }; 205 206 struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag = { 207 WII_MEM2_BASE, /* _bounce_thresh_min */ 208 WII_MEM2_BASE + WII_MEM2_SIZE - 1, /* _bounce_thresh_max */ 209 _bus_dmamap_create, 210 _bus_dmamap_destroy, 211 _bus_dmamap_load, 212 _bus_dmamap_load_mbuf, 213 _bus_dmamap_load_uio, 214 _bus_dmamap_load_raw, 215 _bus_dmamap_unload, 216 _bus_dmamap_sync, 217 wii_mem2_dmamem_alloc, 218 _bus_dmamem_free, 219 _bus_dmamem_map, 220 _bus_dmamem_unmap, 221 _bus_dmamem_mmap, 222 wii_dma_phys_to_bus_mem, 223 wii_dma_bus_mem_to_phys, 224 }; 225 226 227 /* 228 * Global variables used here and there 229 */ 230 struct mem_region physmemr[4], availmemr[4]; 231 char wii_cmdline[1024]; 232 bool wiiu_plat; /* Running on a Wii U */ 233 bool wiiu_native; /* Native Wii U mode (not vWii) */ 234 235 void initppc(u_int, u_int, u_int, void *); /* Called from locore */ 236 void wii_dolphin_elf_loader_id(void); 237 238 static void wii_setup(void); 239 static void wii_poweroff(void); 240 static void wii_reset(void); 241 static void wii_halt(void); 242 static void init_decrementer(void); 243 244 static void 245 system_detect(void) 246 { 247 uint32_t val; 248 249 val = in32(LT_CHIPREVID); 250 if (__SHIFTOUT(val, LT_CHIPREVID_MAGIC) == LT_CHIPREVID_MAGIC_CAFE) { 251 wiiu_plat = true; 252 wiiu_native = (in32(LT_PIMCOMPAT) & PPC_COMPAT) == 0; 253 } 254 } 255 256 static void 257 wii_init_cmdline(void) 258 { 259 extern struct wii_argv wii_argv; 260 261 if (wii_argv.magic == WII_ARGV_MAGIC) { 262 void *ptr = (void *)(uintptr_t)(wii_argv.cmdline & ~0x80000000); 263 if (ptr != NULL) { 264 memcpy(wii_cmdline, ptr, wii_argv.length); 265 } 266 } else { 267 snprintf(wii_cmdline, sizeof(wii_cmdline), WII_DEFAULT_CMDLINE); 268 } 269 } 270 271 static void 272 wii_init_memmap(u_int endkernel) 273 { 274 uint32_t mem2_start, mem2_end; 275 276 mem2_start = in32(GLOBAL_MEM2_AVAIL_START) & ~0x80000000; 277 mem2_end = in32(GLOBAL_MEM2_AVAIL_END) & ~0x80000000; 278 if (mem2_start < WII_MEM2_BASE) { 279 /* Must have been booted from MINI. */ 280 mem2_start = WII_MEM2_BASE + DSP_MEM_SIZE; 281 mem2_end = MINI_MEM2_START; 282 } 283 /* 284 * Clear GLOBAL_MEM2_AVAIL_{START,END} so we can detect the correct 285 * memory size when soft resetting from IOS to MINI. 286 */ 287 out32(GLOBAL_MEM2_AVAIL_START, 0); 288 out32(GLOBAL_MEM2_AVAIL_END, 0); 289 290 /* MEM1 24MB 1T-SRAM */ 291 physmemr[0].start = WII_MEM1_BASE; 292 physmemr[0].size = WII_MEM1_SIZE; 293 294 /* MEM2 64MB GDDR3 */ 295 physmemr[1].start = WII_MEM2_BASE; 296 physmemr[1].size = WII_MEM2_SIZE; 297 298 physmemr[2].size = 0; 299 300 /* MEM1 available memory */ 301 availmemr[0].start = ((endkernel & ~0x80000000) + PGOFSET) & ~PGOFSET; 302 availmemr[0].size = physmemr[0].size - availmemr[0].start; 303 /* External framebuffer is at the end of MEM1 */ 304 availmemr[0].size -= XFB_SIZE; 305 306 /* MEM2 available memory */ 307 availmemr[1].start = mem2_start; 308 availmemr[1].size = mem2_end - mem2_start; 309 310 availmemr[2].size = 0; 311 } 312 313 static void 314 wiiu_init_cmdline(void) 315 { 316 struct wiiu_argv *argv = (struct wiiu_argv *)WIIU_LOADER_DATA_ADDR; 317 318 if (argv->magic == WIIU_LOADER_MAGIC) { 319 char *p; 320 321 /* 322 * Split the command line string into tokens to match 323 * the format used by HBC. 324 */ 325 memcpy(wii_cmdline, argv->cmdline, sizeof(argv->cmdline)); 326 wii_cmdline[sizeof(argv->cmdline) - 1] = '\0'; 327 p = wii_cmdline; 328 for (;;) { 329 p = strchr(p, ' '); 330 if (*p == '\0') { 331 break; 332 } 333 *p++ = '\0'; 334 } 335 p++; 336 *p = '\0'; 337 } else { 338 snprintf(wii_cmdline, sizeof(wii_cmdline), WII_DEFAULT_CMDLINE); 339 } 340 } 341 342 static void 343 wiiu_init_memmap(u_int endkernel) 344 { 345 /* MEM1 32MB */ 346 physmemr[0].start = 0x00000000; 347 physmemr[0].size = 0x2000000; 348 349 /* MEM0 3MB */ 350 physmemr[1].start = 0x08000000; 351 physmemr[1].size = 0x300000; 352 353 /* MEM2 2GB */ 354 physmemr[2].start = 0x10000000; 355 physmemr[2].size = 0x80000000; 356 357 physmemr[3].size = 0; 358 359 /* MEM1 available memory */ 360 availmemr[0].start = (endkernel + PGOFSET) & ~PGOFSET; 361 availmemr[0].size = physmemr[0].size - availmemr[0].start; 362 363 /* 364 * MEM2 available memory. Reserved regions: 365 * USB DMA 0x10000000 - 0x103fffff 366 * Sound DMA 0x10400000 - 0x1041ffff 367 * Framebuffer 0x17500000 - 0x17a7ffff 368 */ 369 availmemr[1].start = 0x10420000; 370 availmemr[1].size = 0x17500000 - availmemr[1].start; 371 availmemr[2].start = 0x17a80000; 372 availmemr[2].size = physmemr[2].start + physmemr[2].size - 373 availmemr[2].start; 374 375 availmemr[3].size = 0; 376 } 377 378 void 379 initppc(u_int startkernel, u_int endkernel, u_int args, void *btinfo) 380 { 381 extern uint32_t ticks_per_sec; 382 extern uint32_t ticks_per_msec; 383 extern unsigned char edata[], end[]; 384 register_t scratch, spr; 385 386 memset(&edata, 0, end - edata); /* clear BSS */ 387 wii_cmdline[0] = '\0'; 388 389 system_detect(); 390 391 if (wiiu_native) { 392 wiiu_init_cmdline(); 393 wiiu_init_memmap(endkernel); 394 } else { 395 wii_init_cmdline(); 396 wii_init_memmap(endkernel); 397 } 398 399 #ifdef BOOTHOWTO 400 /* 401 * boothowto 402 */ 403 boothowto = BOOTHOWTO; 404 #endif 405 406 cpu_model_init(); 407 408 if (!wiiu_native) { 409 spr = mfspr(IBM750CL_SPR_HID4); 410 spr |= HID4_L2_CCFI; 411 spr |= HID4_DBP; 412 mtspr(IBM750CL_SPR_HID4, spr); 413 asm volatile ("isync"); 414 } 415 416 if (wiiu_native) { 417 spr = mfspr(SPR_IBMESPRESSO_HID5); 418 mtspr(SPR_IBMESPRESSO_HID5, spr | HID5_H5A | HID5_PIRE); 419 420 spr = mfspr(SPR_SCR); 421 mtspr(SPR_SCR, (spr & ~0x40000000) | 0x80000000); 422 423 spr = mfspr(SPR_CAR); 424 mtspr(SPR_CAR, spr | 0xfc100000); 425 426 mtspr(SPR_BCR, 0x08000000); 427 428 asm volatile ("isync"); 429 } 430 431 /* Configure L2 cache */ 432 l2cr_config = L2CR_L2E; 433 434 if (bus_space_init(&wii_mem_tag, NULL, 435 ex_storage[0], sizeof(ex_storage[0]))) { 436 panic("bus_space_init failed"); 437 } 438 439 /* 440 * Initialize the BAT registers 441 */ 442 if (wiiu_native) { 443 oea_batinit( 444 WII_IOMEM_BASE, BAT_BL_32M, 445 0); 446 } else { 447 oea_batinit( 448 EFB_BASE, BAT_BL_128M, 449 0); 450 } 451 452 /* 453 * Set up trap vectors 454 */ 455 oea_init(NULL); 456 457 /* 458 * Get CPU clock 459 */ 460 ticks_per_sec = wiiu_native ? WIIU_TIMEBASE_FREQ_HZ : 461 WII_TIMEBASE_FREQ_HZ; 462 ticks_per_msec = ticks_per_sec / 1000; 463 cpu_timebase = ticks_per_sec; 464 465 wii_setup(); 466 467 uvm_md_init(); 468 469 /* 470 * Initialize pmap module. 471 */ 472 pmap_bootstrap(startkernel, endkernel); 473 474 /* Now enable translation (and machine checks/recoverable interrupts) */ 475 asm volatile ("sync; mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 476 : "=r"(scratch) 477 : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 478 479 /* 480 * Setup decrementer 481 */ 482 init_decrementer(); 483 } 484 485 void 486 mem_regions(struct mem_region **mem, struct mem_region **avail) 487 { 488 *mem = physmemr; 489 *avail = availmemr; 490 } 491 492 /* 493 * Machine dependent startup code. 494 */ 495 void 496 cpu_startup(void) 497 { 498 oea_startup(NULL); 499 500 /* 501 * Now that we have VM, malloc()s are OK in bus_space. 502 */ 503 bus_space_mallocok(); 504 505 /* Set up interrupt controller */ 506 pic_init(); 507 pi_init_intr(); 508 oea_install_extint(pic_ext_intr); 509 510 #ifdef MULTIPROCESSOR 511 if (wiiu_native) { 512 ipi_latte_init(); 513 oea_install_extint_vec(pic_ext_intr, EXC_IPI); 514 } 515 #endif 516 } 517 518 /* 519 * No early console support. 520 */ 521 void 522 consinit(void) 523 { 524 #if NGENFB > 0 525 if (wiiu_native) { 526 extern void wiiufb_consinit(void); 527 wiiufb_consinit(); 528 } 529 #endif 530 #if NGECKO > 0 531 if (!wiiu_native) { 532 usbgecko_consinit(); 533 } 534 #endif 535 #if NUKBD > 0 536 ukbd_cnattach(); 537 #endif 538 } 539 540 /* 541 * Halt or reboot the machine after syncing/dumping according to howto. 542 */ 543 void 544 cpu_reboot(int howto, char *what) 545 { 546 static int syncdone = false; 547 548 if (cold) { 549 howto |= RB_HALT; 550 goto haltsys; 551 } 552 553 boothowto = howto; 554 555 if ((howto & RB_NOSYNC) == 0 && panicstr == NULL) { 556 if (!syncdone) { 557 syncdone = true; 558 /* XXX used to force unmount as well, here */ 559 vfs_sync_all(curlwp); 560 } 561 562 while (vfs_unmountall1(curlwp, false, false) || 563 config_detach_all(boothowto) || 564 vfs_unmount_forceone(curlwp)) { 565 /* do nothing */ 566 } 567 } else { 568 if (!db_active) { 569 suspendsched(); 570 } 571 } 572 573 pmf_system_shutdown(boothowto); 574 575 /* Disable interrupts */ 576 splhigh(); 577 578 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 579 oea_dumpsys(); 580 } 581 582 haltsys: 583 doshutdownhooks(); 584 585 #ifdef MULTIPROCESSOR 586 cpu_halt_others(); 587 delay(100000); 588 #endif 589 590 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 591 printf("power off\n\n"); 592 wii_poweroff(); 593 delay(100000); 594 printf("power off failed!\n\n"); 595 } 596 597 if (howto & RB_HALT) { 598 printf("The operating system has halted.\n"); 599 wii_halt(); 600 } 601 602 printf("rebooting...\n\n"); 603 wii_reset(); 604 while (1); 605 } 606 607 static void 608 wii_setup(void) 609 { 610 /* Enable PPC access to EXI bus. */ 611 out32(HW_AIPPROT, in32(HW_AIPPROT) | ENAHBIOPI); 612 613 if (!wiiu_plat) { 614 /* Turn on the drive slot LED. */ 615 wii_slot_led(true); 616 617 /* Enable PPC access to SHUTDOWN GPIO. */ 618 out32(HW_GPIO_OWNER, in32(HW_GPIO_OWNER) | __BIT(GPIO_SHUTDOWN)); 619 620 /* Enable PPC access to DI_SPIN GPIO. */ 621 out32(HW_GPIO_OWNER, in32(HW_GPIO_OWNER) | __BIT(GPIO_DI_SPIN)); 622 623 /* Enable DVD video support. */ 624 out32(HW_COMPAT, in32(HW_COMPAT) & ~DVDVIDEO); 625 } 626 } 627 628 static void 629 wiiu_wood_ipc(uint32_t msg) 630 { 631 KASSERT(wiiu_native); 632 633 out32(HW_IPCPPCMSG, msg); 634 out32(HW_IPCPPCCTRL, HW_IPCPPCCTRL_X1); 635 for (;;) { 636 if ((in32(HW_IPCPPCCTRL) & HW_IPCPPCCTRL_X1) == 0) { 637 break; 638 } 639 } 640 } 641 642 static void 643 wii_poweroff(void) 644 { 645 if (wiiu_native) { 646 wiiu_wood_ipc(CMD_POWEROFF); 647 } else { 648 out32(HW_GPIOB_OUT, in32(HW_GPIOB_OUT) | __BIT(GPIO_SHUTDOWN)); 649 } 650 } 651 652 static void 653 wii_reset(void) 654 { 655 if (wiiu_native) { 656 wiiu_wood_ipc(CMD_REBOOT); 657 } else { 658 out32(HW_RESETS, in32(HW_RESETS) & ~RSTBINB); 659 } 660 } 661 662 static void 663 wii_halt(void) 664 { 665 printf("Please press the %s button to reboot.\n", 666 wiiu_native ? "POWER" : "RESET"); 667 if (wiiu_native) { 668 bool pressed = false; 669 while (1) { 670 if ((in32(HW_GPIOB_IN) & __BIT(WIIU_GPIO_POWER)) != 0) { 671 /* Button was pressed */ 672 pressed = true; 673 } else if (pressed) { 674 /* Button was released */ 675 break; 676 } 677 } 678 } else { 679 while (1) { 680 if ((in32(PI_INTERRUPT_CAUSE) & RESET_SWITCH_STATE) == 0) { 681 break; 682 } 683 } 684 } 685 } 686 687 static void 688 init_decrementer(void) 689 { 690 extern uint32_t ns_per_tick; 691 extern uint32_t ticks_per_intr; 692 extern uint32_t ticks_per_sec; 693 int scratch, msr; 694 695 KASSERT(ticks_per_sec != 0); 696 697 __asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 698 : "=r"(msr), "=r"(scratch) : "K"((u_short)~PSL_EE)); 699 ns_per_tick = 1000000000 / ticks_per_sec; 700 ticks_per_intr = ticks_per_sec / hz; 701 cpu_timebase = ticks_per_sec; 702 703 curcpu()->ci_lasttb = mftbl(); 704 705 mtspr(SPR_DEC, ticks_per_intr); 706 mtmsr(msr); 707 } 708
Indexes created Sat Jul 04 00:25:45 UTC 2026