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 #ifdef __powerpc64__ 133 #include "mmu_oea64.h" 134 #endif 135 136 #ifndef __powerpc64__ 137 struct bat battable[16]; 138 #endif 139 140 #ifndef __powerpc64__ 141 /* Bits for running on 64-bit systems in 32-bit mode. */ 142 extern void *testppc64, *testppc64size; 143 extern void *restorebridge, *restorebridgesize; 144 extern void *rfid_patch, *rfi_patch1, *rfi_patch2; 145 extern void *trapcode64; 146 147 extern Elf_Addr _GLOBAL_OFFSET_TABLE_[]; 148 #endif 149 150 extern void *rstcode, *rstcodeend; 151 extern void *trapcode, *trapcodeend; 152 extern void *generictrap, *generictrap64; 153 extern void *alitrap, *aliend; 154 extern void *dsitrap, *dsiend; 155 extern void *decrint, *decrsize; 156 extern void *extint, *extsize; 157 extern void *dblow, *dbend; 158 extern void *imisstrap, *imisssize; 159 extern void *dlmisstrap, *dlmisssize; 160 extern void *dsmisstrap, *dsmisssize; 161 162 extern void *ap_pcpu; 163 extern void __restartkernel(vm_offset_t, vm_offset_t, vm_offset_t, void *, uint32_t, register_t offset, register_t msr); 164 165 void aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, 166 void *mdp, uint32_t mdp_cookie); 167 void aim_cpu_init(vm_offset_t toc); 168 169 void 170 aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp, 171 uint32_t mdp_cookie) 172 { 173 register_t scratch; 174 175 /* 176 * If running from an FDT, make sure we are in real mode to avoid 177 * tromping on firmware page tables. Everything in the kernel assumes 178 * 1:1 mappings out of firmware, so this won't break anything not 179 * already broken. This doesn't work if there is live OF, since OF 180 * may internally use non-1:1 mappings. 181 */ 182 if (ofentry == 0) 183 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 184 185 #ifdef __powerpc64__ 186 /* 187 * If in real mode, relocate to high memory so that the kernel 188 * can execute from the direct map. 189 */ 190 if (!(mfmsr() & PSL_DR) && 191 (vm_offset_t)&aim_early_init < DMAP_BASE_ADDRESS) 192 __restartkernel(fdt, 0, ofentry, mdp, mdp_cookie, 193 DMAP_BASE_ADDRESS, mfmsr()); 194 #endif 195 196 /* Various very early CPU fix ups */ 197 switch (mfpvr() >> 16) { 198 /* 199 * PowerPC 970 CPUs have a misfeature requested by Apple that 200 * makes them pretend they have a 32-byte cacheline. Turn this 201 * off before we measure the cacheline size. 202 */ 203 case IBM970: 204 case IBM970FX: 205 case IBM970MP: 206 case IBM970GX: 207 scratch = mfspr(SPR_HID5); 208 scratch &= ~HID5_970_DCBZ_SIZE_HI; 209 mtspr(SPR_HID5, scratch); 210 break; 211 #ifdef __powerpc64__ 212 case IBMPOWER7: 213 case IBMPOWER7PLUS: 214 case IBMPOWER8: 215 case IBMPOWER8E: 216 /* XXX: get from ibm,slb-size in device tree */ 217 n_slbs = 32; 218 break; 219 #endif 220 } 221 } 222 223 void 224 aim_cpu_init(vm_offset_t toc) 225 { 226 size_t trap_offset, trapsize; 227 vm_offset_t trap; 228 register_t msr; 229 uint8_t *cache_check; 230 int cacheline_warn; 231 #ifndef __powerpc64__ 232 register_t scratch; 233 int ppc64; 234 #endif 235 236 trap_offset = 0; 237 cacheline_warn = 0; 238 239 /* General setup for AIM CPUs */ 240 psl_kernset = PSL_EE | PSL_ME | PSL_IR | PSL_DR | PSL_RI; 241 242 #ifdef __powerpc64__ 243 psl_kernset |= PSL_SF; 244 if (mfmsr() & PSL_HV) 245 psl_kernset |= PSL_HV; 246 #endif 247 psl_userset = psl_kernset | PSL_PR; 248 #ifdef __powerpc64__ 249 psl_userset32 = psl_userset & ~PSL_SF; 250 #endif 251 252 /* Bits that users aren't allowed to change */ 253 psl_userstatic = ~(PSL_VEC | PSL_FP | PSL_FE0 | PSL_FE1); 254 /* 255 * Mask bits from the SRR1 that aren't really the MSR: 256 * Bits 1-4, 10-15 (ppc32), 33-36, 42-47 (ppc64) 257 */ 258 psl_userstatic &= ~0x783f0000UL; 259 260 /* 261 * Initialize the interrupt tables and figure out our cache line 262 * size and whether or not we need the 64-bit bridge code. 263 */ 264 265 /* 266 * Disable translation in case the vector area hasn't been 267 * mapped (G5). Note that no OFW calls can be made until 268 * translation is re-enabled. 269 */ 270 271 msr = mfmsr(); 272 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI); 273 274 /* 275 * Measure the cacheline size using dcbz 276 * 277 * Use EXC_PGM as a playground. We are about to overwrite it 278 * anyway, we know it exists, and we know it is cache-aligned. 279 */ 280 281 cache_check = (void *)EXC_PGM; 282 283 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++) 284 cache_check[cacheline_size] = 0xff; 285 286 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory"); 287 288 /* Find the first byte dcbz did not zero to get the cache line size */ 289 for (cacheline_size = 0; cacheline_size < 0x100 && 290 cache_check[cacheline_size] == 0; cacheline_size++); 291 292 /* Work around psim bug */ 293 if (cacheline_size == 0) { 294 cacheline_warn = 1; 295 cacheline_size = 32; 296 } 297 298 #ifndef __powerpc64__ 299 /* 300 * Figure out whether we need to use the 64 bit PMAP. This works by 301 * executing an instruction that is only legal on 64-bit PPC (mtmsrd), 302 * and setting ppc64 = 0 if that causes a trap. 303 */ 304 305 ppc64 = 1; 306 307 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size); 308 __syncicache((void *)EXC_PGM, (size_t)&testppc64size); 309 310 __asm __volatile("\ 311 mfmsr %0; \ 312 mtsprg2 %1; \ 313 \ 314 mtmsrd %0; \ 315 mfsprg2 %1;" 316 : "=r"(scratch), "=r"(ppc64)); 317 318 if (ppc64) 319 cpu_features |= PPC_FEATURE_64; 320 321 /* 322 * Now copy restorebridge into all the handlers, if necessary, 323 * and set up the trap tables. 324 */ 325 326 if (cpu_features & PPC_FEATURE_64) { 327 /* Patch the two instances of rfi -> rfid */ 328 bcopy(&rfid_patch,&rfi_patch1,4); 329 #ifdef KDB 330 /* rfi_patch2 is at the end of dbleave */ 331 bcopy(&rfid_patch,&rfi_patch2,4); 332 #endif 333 } 334 #else /* powerpc64 */ 335 cpu_features |= PPC_FEATURE_64; 336 #endif 337 338 trapsize = (size_t)&trapcodeend - (size_t)&trapcode; 339 340 /* 341 * Copy generic handler into every possible trap. Special cases will get 342 * different ones in a minute. 343 */ 344 for (trap = EXC_RST; trap < EXC_LAST; trap += 0x20) 345 bcopy(&trapcode, (void *)trap, trapsize); 346 347 #ifndef __powerpc64__ 348 if (cpu_features & PPC_FEATURE_64) { 349 /* 350 * Copy a code snippet to restore 32-bit bridge mode 351 * to the top of every non-generic trap handler 352 */ 353 354 trap_offset += (size_t)&restorebridgesize; 355 bcopy(&restorebridge, (void *)EXC_RST, trap_offset); 356 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset); 357 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset); 358 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset); 359 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset); 360 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset); 361 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset); 362 } 363 #endif 364 365 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstcodeend - 366 (size_t)&rstcode); 367 368 #ifdef KDB 369 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbend - 370 (size_t)&dblow); 371 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbend - 372 (size_t)&dblow); 373 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbend - 374 (size_t)&dblow); 375 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbend - 376 (size_t)&dblow); 377 #endif 378 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&aliend - 379 (size_t)&alitrap); 380 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsiend - 381 (size_t)&dsitrap); 382 383 #ifdef __powerpc64__ 384 /* Set TOC base so that the interrupt code can get at it */ 385 *((void **)TRAP_GENTRAP) = &generictrap; 386 *((register_t *)TRAP_TOCBASE) = toc; 387 #else 388 /* Set branch address for trap code */ 389 if (cpu_features & PPC_FEATURE_64) 390 *((void **)TRAP_GENTRAP) = &generictrap64; 391 else 392 *((void **)TRAP_GENTRAP) = &generictrap; 393 *((void **)TRAP_TOCBASE) = _GLOBAL_OFFSET_TABLE_; 394 395 /* G2-specific TLB miss helper handlers */ 396 bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize); 397 bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize); 398 bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize); 399 #endif 400 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 401 402 /* 403 * Restore MSR 404 */ 405 mtmsr(msr); 406 407 /* Warn if cachline size was not determined */ 408 if (cacheline_warn == 1) { 409 printf("WARNING: cacheline size undetermined, setting to 32\n"); 410 } 411 412 /* 413 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority 414 * in case the platform module had a better idea of what we 415 * should do. 416 */ 417 if (cpu_features & PPC_FEATURE_64) 418 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC); 419 else 420 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC); 421 } 422 423 /* 424 * Shutdown the CPU as much as possible. 425 */ 426 void 427 cpu_halt(void) 428 { 429 430 OF_exit(); 431 } 432 433 int 434 ptrace_single_step(struct thread *td) 435 { 436 struct trapframe *tf; 437 438 tf = td->td_frame; 439 tf->srr1 |= PSL_SE; 440 441 return (0); 442 } 443 444 int 445 ptrace_clear_single_step(struct thread *td) 446 { 447 struct trapframe *tf; 448 449 tf = td->td_frame; 450 tf->srr1 &= ~PSL_SE; 451 452 return (0); 453 } 454 455 void 456 kdb_cpu_clear_singlestep(void) 457 { 458 459 kdb_frame->srr1 &= ~PSL_SE; 460 } 461 462 void 463 kdb_cpu_set_singlestep(void) 464 { 465 466 kdb_frame->srr1 |= PSL_SE; 467 } 468 469 /* 470 * Initialise a struct pcpu. 471 */ 472 void 473 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 474 { 475 #ifdef __powerpc64__ 476 /* Copy the SLB contents from the current CPU */ 477 memcpy(pcpu->pc_aim.slb, PCPU_GET(aim.slb), sizeof(pcpu->pc_aim.slb)); 478 #endif 479 } 480 481 #ifndef __powerpc64__ 482 uint64_t 483 va_to_vsid(pmap_t pm, vm_offset_t va) 484 { 485 return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK); 486 } 487 488 #endif 489 490 /* 491 * These functions need to provide addresses that both (a) work in real mode 492 * (or whatever mode/circumstances the kernel is in in early boot (now)) and 493 * (b) can still, in principle, work once the kernel is going. Because these 494 * rely on existing mappings/real mode, unmap is a no-op. 495 */ 496 vm_offset_t 497 pmap_early_io_map(vm_paddr_t pa, vm_size_t size) 498 { 499 KASSERT(!pmap_bootstrapped, ("Not available after PMAP started!")); 500 501 /* 502 * If we have the MMU up in early boot, assume it is 1:1. Otherwise, 503 * try to get the address in a memory region compatible with the 504 * direct map for efficiency later. 505 */ 506 if (mfmsr() & PSL_DR) 507 return (pa); 508 else 509 return (DMAP_BASE_ADDRESS + pa); 510 } 511 512 void 513 pmap_early_io_unmap(vm_offset_t va, vm_size_t size) 514 { 515 516 KASSERT(!pmap_bootstrapped, ("Not available after PMAP started!")); 517 } 518 519 /* From p3-53 of the MPC7450 RISC Microprocessor Family Reference Manual */ 520 void 521 flush_disable_caches(void) 522 { 523 register_t msr; 524 register_t msscr0; 525 register_t cache_reg; 526 volatile uint32_t *memp; 527 uint32_t temp; 528 int i; 529 int x; 530 531 msr = mfmsr(); 532 powerpc_sync(); 533 mtmsr(msr & ~(PSL_EE | PSL_DR)); 534 msscr0 = mfspr(SPR_MSSCR0); 535 msscr0 &= ~MSSCR0_L2PFE; 536 mtspr(SPR_MSSCR0, msscr0); 537 powerpc_sync(); 538 isync(); 539 __asm__ __volatile__("dssall; sync"); 540 powerpc_sync(); 541 isync(); 542 __asm__ __volatile__("dcbf 0,%0" :: "r"(0)); 543 __asm__ __volatile__("dcbf 0,%0" :: "r"(0)); 544 __asm__ __volatile__("dcbf 0,%0" :: "r"(0)); 545 546 /* Lock the L1 Data cache. */ 547 mtspr(SPR_LDSTCR, mfspr(SPR_LDSTCR) | 0xFF); 548 powerpc_sync(); 549 isync(); 550 551 mtspr(SPR_LDSTCR, 0); 552 553 /* 554 * Perform this in two stages: Flush the cache starting in RAM, then do it 555 * from ROM. 556 */ 557 memp = (volatile uint32_t *)0x00000000; 558 for (i = 0; i < 128 * 1024; i++) { 559 temp = *memp; 560 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp)); 561 memp += 32/sizeof(*memp); 562 } 563 564 memp = (volatile uint32_t *)0xfff00000; 565 x = 0xfe; 566 567 for (; x != 0xff;) { 568 mtspr(SPR_LDSTCR, x); 569 for (i = 0; i < 128; i++) { 570 temp = *memp; 571 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp)); 572 memp += 32/sizeof(*memp); 573 } 574 x = ((x << 1) | 1) & 0xff; 575 } 576 mtspr(SPR_LDSTCR, 0); 577 578 cache_reg = mfspr(SPR_L2CR); 579 if (cache_reg & L2CR_L2E) { 580 cache_reg &= ~(L2CR_L2IO_7450 | L2CR_L2DO_7450); 581 mtspr(SPR_L2CR, cache_reg); 582 powerpc_sync(); 583 mtspr(SPR_L2CR, cache_reg | L2CR_L2HWF); 584 while (mfspr(SPR_L2CR) & L2CR_L2HWF) 585 ; /* Busy wait for cache to flush */ 586 powerpc_sync(); 587 cache_reg &= ~L2CR_L2E; 588 mtspr(SPR_L2CR, cache_reg); 589 powerpc_sync(); 590 mtspr(SPR_L2CR, cache_reg | L2CR_L2I); 591 powerpc_sync(); 592 while (mfspr(SPR_L2CR) & L2CR_L2I) 593 ; /* Busy wait for L2 cache invalidate */ 594 powerpc_sync(); 595 } 596 597 cache_reg = mfspr(SPR_L3CR); 598 if (cache_reg & L3CR_L3E) { 599 cache_reg &= ~(L3CR_L3IO | L3CR_L3DO); 600 mtspr(SPR_L3CR, cache_reg); 601 powerpc_sync(); 602 mtspr(SPR_L3CR, cache_reg | L3CR_L3HWF); 603 while (mfspr(SPR_L3CR) & L3CR_L3HWF) 604 ; /* Busy wait for cache to flush */ 605 powerpc_sync(); 606 cache_reg &= ~L3CR_L3E; 607 mtspr(SPR_L3CR, cache_reg); 608 powerpc_sync(); 609 mtspr(SPR_L3CR, cache_reg | L3CR_L3I); 610 powerpc_sync(); 611 while (mfspr(SPR_L3CR) & L3CR_L3I) 612 ; /* Busy wait for L3 cache invalidate */ 613 powerpc_sync(); 614 } 615 616 mtspr(SPR_HID0, mfspr(SPR_HID0) & ~HID0_DCE); 617 powerpc_sync(); 618 isync(); 619 620 mtmsr(msr); 621 } 622 623 void 624 cpu_sleep() 625 { 626 static u_quad_t timebase = 0; 627 static register_t sprgs[4]; 628 static register_t srrs[2]; 629 630 jmp_buf resetjb; 631 struct thread *fputd; 632 struct thread *vectd; 633 register_t hid0; 634 register_t msr; 635 register_t saved_msr; 636 637 ap_pcpu = pcpup; 638 639 PCPU_SET(restore, &resetjb); 640 641 saved_msr = mfmsr(); 642 fputd = PCPU_GET(fputhread); 643 vectd = PCPU_GET(vecthread); 644 if (fputd != NULL) 645 save_fpu(fputd); 646 if (vectd != NULL) 647 save_vec(vectd); 648 if (setjmp(resetjb) == 0) { 649 sprgs[0] = mfspr(SPR_SPRG0); 650 sprgs[1] = mfspr(SPR_SPRG1); 651 sprgs[2] = mfspr(SPR_SPRG2); 652 sprgs[3] = mfspr(SPR_SPRG3); 653 srrs[0] = mfspr(SPR_SRR0); 654 srrs[1] = mfspr(SPR_SRR1); 655 timebase = mftb(); 656 powerpc_sync(); 657 flush_disable_caches(); 658 hid0 = mfspr(SPR_HID0); 659 hid0 = (hid0 & ~(HID0_DOZE | HID0_NAP)) | HID0_SLEEP; 660 powerpc_sync(); 661 isync(); 662 msr = mfmsr() | PSL_POW; 663 mtspr(SPR_HID0, hid0); 664 powerpc_sync(); 665 666 while (1) 667 mtmsr(msr); 668 } 669 platform_smp_timebase_sync(timebase, 0); 670 PCPU_SET(curthread, curthread); 671 PCPU_SET(curpcb, curthread->td_pcb); 672 pmap_activate(curthread); 673 powerpc_sync(); 674 mtspr(SPR_SPRG0, sprgs[0]); 675 mtspr(SPR_SPRG1, sprgs[1]); 676 mtspr(SPR_SPRG2, sprgs[2]); 677 mtspr(SPR_SPRG3, sprgs[3]); 678 mtspr(SPR_SRR0, srrs[0]); 679 mtspr(SPR_SRR1, srrs[1]); 680 mtmsr(saved_msr); 681 if (fputd == curthread) 682 enable_fpu(curthread); 683 if (vectd == curthread) 684 enable_vec(curthread); 685 powerpc_sync(); 686 } 687 688