machdep.c revision 203924
1/*- 2 * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 19 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25/*- 26 * Copyright (C) 2001 Benno Rice 27 * All rights reserved. 28 * 29 * Redistribution and use in source and binary forms, with or without 30 * modification, are permitted provided that the following conditions 31 * are met: 32 * 1. Redistributions of source code must retain the above copyright 33 * notice, this list of conditions and the following disclaimer. 34 * 2. Redistributions in binary form must reproduce the above copyright 35 * notice, this list of conditions and the following disclaimer in the 36 * documentation and/or other materials provided with the distribution. 37 * 38 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 41 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 44 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 45 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 46 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 47 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 48 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ 49 */ 50/*- 51 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 52 * Copyright (C) 1995, 1996 TooLs GmbH. 53 * All rights reserved. 54 * 55 * Redistribution and use in source and binary forms, with or without 56 * modification, are permitted provided that the following conditions 57 * are met: 58 * 1. Redistributions of source code must retain the above copyright 59 * notice, this list of conditions and the following disclaimer. 60 * 2. Redistributions in binary form must reproduce the above copyright 61 * notice, this list of conditions and the following disclaimer in the 62 * documentation and/or other materials provided with the distribution. 63 * 3. All advertising materials mentioning features or use of this software 64 * must display the following acknowledgement: 65 * This product includes software developed by TooLs GmbH. 66 * 4. The name of TooLs GmbH may not be used to endorse or promote products 67 * derived from this software without specific prior written permission. 68 * 69 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 70 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 71 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 72 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 73 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 74 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 75 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 76 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 77 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 78 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 79 */ 80 81#include <sys/cdefs.h> 82__FBSDID("$FreeBSD: head/sys/powerpc/booke/machdep.c 203924 2010-02-15 14:38:30Z raj $"); 83 84#include "opt_compat.h" 85#include "opt_ddb.h" 86#include "opt_kstack_pages.h" 87#include "opt_msgbuf.h" 88 89#include <sys/cdefs.h> 90#include <sys/types.h> 91#include <sys/param.h> 92#include <sys/proc.h> 93#include <sys/systm.h> 94#include <sys/time.h> 95#include <sys/bio.h> 96#include <sys/buf.h> 97#include <sys/bus.h> 98#include <sys/cons.h> 99#include <sys/cpu.h> 100#include <sys/kdb.h> 101#include <sys/kernel.h> 102#include <sys/lock.h> 103#include <sys/mutex.h> 104#include <sys/sysctl.h> 105#include <sys/exec.h> 106#include <sys/ktr.h> 107#include <sys/sysproto.h> 108#include <sys/signalvar.h> 109#include <sys/sysent.h> 110#include <sys/imgact.h> 111#include <sys/msgbuf.h> 112#include <sys/ptrace.h> 113 114#include <vm/vm.h> 115#include <vm/pmap.h> 116#include <vm/vm_page.h> 117#include <vm/vm_object.h> 118#include <vm/vm_pager.h> 119 120#include <machine/cpu.h> 121#include <machine/kdb.h> 122#include <machine/reg.h> 123#include <machine/vmparam.h> 124#include <machine/spr.h> 125#include <machine/hid.h> 126#include <machine/psl.h> 127#include <machine/trap.h> 128#include <machine/md_var.h> 129#include <machine/mmuvar.h> 130#include <machine/sigframe.h> 131#include <machine/metadata.h> 132#include <machine/bootinfo.h> 133#include <machine/platform.h> 134 135#include <sys/linker.h> 136#include <sys/reboot.h> 137 138#include <powerpc/mpc85xx/ocpbus.h> 139#include <powerpc/mpc85xx/mpc85xx.h> 140 141#ifdef DDB 142extern vm_offset_t ksym_start, ksym_end; 143#endif 144 145#ifdef DEBUG 146#define debugf(fmt, args...) printf(fmt, ##args) 147#else 148#define debugf(fmt, args...) 149#endif 150 151extern unsigned char kernel_text[]; 152extern unsigned char _etext[]; 153extern unsigned char _edata[]; 154extern unsigned char __bss_start[]; 155extern unsigned char __sbss_start[]; 156extern unsigned char __sbss_end[]; 157extern unsigned char _end[]; 158 159extern void dcache_enable(void); 160extern void dcache_inval(void); 161extern void icache_enable(void); 162extern void icache_inval(void); 163 164struct kva_md_info kmi; 165struct pcpu __pcpu[MAXCPU]; 166struct trapframe frame0; 167int cold = 1; 168long realmem = 0; 169long Maxmem = 0; 170 171struct bootinfo *bootinfo; 172 173char machine[] = "powerpc"; 174SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 175 176int cacheline_size = 32; 177 178SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 179 CTLFLAG_RD, &cacheline_size, 0, ""); 180 181int hw_direct_map = 0; 182 183static void cpu_e500_startup(void *); 184SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL); 185 186void print_kernel_section_addr(void); 187void print_bootinfo(void); 188void print_kenv(void); 189u_int e500_init(u_int32_t, u_int32_t, void *); 190 191static void 192cpu_e500_startup(void *dummy) 193{ 194 int indx, size; 195 196 /* Initialise the decrementer-based clock. */ 197 decr_init(); 198 199 /* Good {morning,afternoon,evening,night}. */ 200 cpu_setup(PCPU_GET(cpuid)); 201 202 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 203 ptoa(physmem) / 1048576); 204 realmem = physmem; 205 206 /* Display any holes after the first chunk of extended memory. */ 207 if (bootverbose) { 208 printf("Physical memory chunk(s):\n"); 209 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 210 size = phys_avail[indx + 1] - phys_avail[indx]; 211 212 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 213 phys_avail[indx], phys_avail[indx + 1] - 1, 214 size, size / PAGE_SIZE); 215 } 216 } 217 218 vm_ksubmap_init(&kmi); 219 220 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 221 ptoa(cnt.v_free_count) / 1048576); 222 223 /* Set up buffers, so they can be used to read disk labels. */ 224 bufinit(); 225 vm_pager_bufferinit(); 226} 227 228static char * 229kenv_next(char *cp) 230{ 231 232 if (cp != NULL) { 233 while (*cp != 0) 234 cp++; 235 cp++; 236 if (*cp == 0) 237 cp = NULL; 238 } 239 return (cp); 240} 241 242void 243print_kenv(void) 244{ 245 int len; 246 char *cp; 247 248 debugf("loader passed (static) kenv:\n"); 249 if (kern_envp == NULL) { 250 debugf(" no env, null ptr\n"); 251 return; 252 } 253 debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp); 254 255 len = 0; 256 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) 257 debugf(" %x %s\n", (u_int32_t)cp, cp); 258} 259 260void 261print_bootinfo(void) 262{ 263 struct bi_mem_region *mr; 264 struct bi_eth_addr *eth; 265 int i, j; 266 267 debugf("bootinfo:\n"); 268 if (bootinfo == NULL) { 269 debugf(" no bootinfo, null ptr\n"); 270 return; 271 } 272 273 debugf(" version = 0x%08x\n", bootinfo->bi_version); 274 debugf(" ccsrbar = 0x%08x\n", bootinfo->bi_bar_base); 275 debugf(" cpu_clk = 0x%08x\n", bootinfo->bi_cpu_clk); 276 debugf(" bus_clk = 0x%08x\n", bootinfo->bi_bus_clk); 277 278 debugf(" mem regions:\n"); 279 mr = (struct bi_mem_region *)bootinfo->bi_data; 280 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) 281 debugf(" #%d, base = 0x%08x, size = 0x%08x\n", i, 282 mr->mem_base, mr->mem_size); 283 284 debugf(" eth addresses:\n"); 285 eth = (struct bi_eth_addr *)mr; 286 for (i = 0; i < bootinfo->bi_eth_addr_no; i++, eth++) { 287 debugf(" #%d, addr = ", i); 288 for (j = 0; j < 6; j++) 289 debugf("%02x ", eth->mac_addr[j]); 290 debugf("\n"); 291 } 292} 293 294void 295print_kernel_section_addr(void) 296{ 297 298 debugf("kernel image addresses:\n"); 299 debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text); 300 debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); 301 debugf(" _edata = 0x%08x\n", (uint32_t)_edata); 302 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start); 303 debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end); 304 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start); 305 debugf(" _end = 0x%08x\n", (uint32_t)_end); 306} 307 308struct bi_mem_region * 309bootinfo_mr(void) 310{ 311 312 return ((struct bi_mem_region *)bootinfo->bi_data); 313} 314 315struct bi_eth_addr * 316bootinfo_eth(void) 317{ 318 struct bi_mem_region *mr; 319 struct bi_eth_addr *eth; 320 int i; 321 322 /* Advance to the eth section */ 323 mr = bootinfo_mr(); 324 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) 325 ; 326 327 eth = (struct bi_eth_addr *)mr; 328 return (eth); 329} 330 331u_int 332e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) 333{ 334 struct pcpu *pc; 335 void *kmdp; 336 vm_offset_t end; 337 uint32_t csr; 338 339 kmdp = NULL; 340 341 end = endkernel; 342 343 /* 344 * Parse metadata and fetch parameters. This must be done as the first 345 * step as we need bootinfo data to at least init the console 346 */ 347 if (mdp != NULL) { 348 preload_metadata = mdp; 349 kmdp = preload_search_by_type("elf kernel"); 350 if (kmdp != NULL) { 351 bootinfo = (struct bootinfo *)preload_search_info(kmdp, 352 MODINFO_METADATA | MODINFOMD_BOOTINFO); 353 354 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 355 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 356 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 357#ifdef DDB 358 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 359 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 360#endif 361 } 362 } else { 363 /* 364 * We should scream but how? - without CCSR bar (in bootinfo) 365 * cannot even output anything... 366 */ 367 368 /* 369 * FIXME add return value and handle in the locore so we can 370 * return to the loader maybe? (this seems not very easy to 371 * restore everything as the TLB have all been reprogrammed 372 * in the locore etc...) 373 */ 374 while(1); 375 } 376 377 /* Initialize TLB1 handling */ 378 tlb1_init(bootinfo->bi_bar_base); 379 380 /* Reset Time Base */ 381 mttb(0); 382 383 /* Init params/tunables that can be overridden by the loader. */ 384 init_param1(); 385 386 /* Start initializing proc0 and thread0. */ 387 proc_linkup0(&proc0, &thread0); 388 thread0.td_frame = &frame0; 389 390 /* Set up per-cpu data and store the pointer in SPR general 0. */ 391 pc = &__pcpu[0]; 392 pcpu_init(pc, 0, sizeof(struct pcpu)); 393 pc->pc_curthread = &thread0; 394 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 395 396 /* Initialize system mutexes. */ 397 mutex_init(); 398 399 /* Initialize the console before printing anything. */ 400 cninit(); 401 402 /* Print out some debug info... */ 403 debugf("e500_init: console initialized\n"); 404 debugf(" arg1 startkernel = 0x%08x\n", startkernel); 405 debugf(" arg2 endkernel = 0x%08x\n", endkernel); 406 debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp); 407 debugf(" end = 0x%08x\n", (u_int32_t)end); 408 debugf(" boothowto = 0x%08x\n", boothowto); 409 debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA); 410 debugf(" MSR = 0x%08x\n", mfmsr()); 411 debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0)); 412 debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1)); 413 debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR)); 414 415 __asm __volatile("msync; isync"); 416 csr = ccsr_read4(OCP85XX_L2CTL); 417 debugf(" L2CTL = 0x%08x\n", csr); 418 419 print_bootinfo(); 420 print_kernel_section_addr(); 421 print_kenv(); 422 //tlb1_print_entries(); 423 //tlb1_print_tlbentries(); 424 425 kdb_init(); 426 427#ifdef KDB 428 if (boothowto & RB_KDB) 429 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 430#endif 431 432 /* Initialise platform module */ 433 platform_probe_and_attach(); 434 435 /* Initialise virtual memory. */ 436 pmap_mmu_install(MMU_TYPE_BOOKE, 0); 437 pmap_bootstrap(startkernel, end); 438 debugf("MSR = 0x%08x\n", mfmsr()); 439 //tlb1_print_entries(); 440 //tlb1_print_tlbentries(); 441 442 /* Initialize params/tunables that are derived from memsize. */ 443 init_param2(physmem); 444 445 /* Finish setting up thread0. */ 446 thread0.td_pcb = (struct pcb *) 447 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 448 sizeof(struct pcb)) & ~15); 449 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 450 pc->pc_curpcb = thread0.td_pcb; 451 452 /* Initialise the message buffer. */ 453 msgbufinit(msgbufp, MSGBUF_SIZE); 454 455 /* Enable Machine Check interrupt. */ 456 mtmsr(mfmsr() | PSL_ME); 457 isync(); 458 459 /* Enable D-cache if applicable */ 460 csr = mfspr(SPR_L1CSR0); 461 if ((csr & L1CSR0_DCE) == 0) { 462 dcache_inval(); 463 dcache_enable(); 464 } 465 466 csr = mfspr(SPR_L1CSR0); 467 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0) 468 printf("L1 D-cache %sabled\n", 469 (csr & L1CSR0_DCE) ? "en" : "dis"); 470 471 /* Enable L1 I-cache if applicable. */ 472 csr = mfspr(SPR_L1CSR1); 473 if ((csr & L1CSR1_ICE) == 0) { 474 icache_inval(); 475 icache_enable(); 476 } 477 478 csr = mfspr(SPR_L1CSR1); 479 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0) 480 printf("L1 I-cache %sabled\n", 481 (csr & L1CSR1_ICE) ? "en" : "dis"); 482 483 debugf("e500_init: SP = 0x%08x\n", ((uintptr_t)thread0.td_pcb - 16) & ~15); 484 debugf("e500_init: e\n"); 485 486 return (((uintptr_t)thread0.td_pcb - 16) & ~15); 487} 488 489#define RES_GRANULE 32 490extern uint32_t tlb0_miss_locks[]; 491 492/* Initialise a struct pcpu. */ 493void 494cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 495{ 496 497 pcpu->pc_tid_next = TID_MIN; 498 499#ifdef SMP 500 uint32_t *ptr; 501 int words_per_gran = RES_GRANULE / sizeof(uint32_t); 502 503 ptr = &tlb0_miss_locks[cpuid * words_per_gran]; 504 pcpu->pc_booke_tlb_lock = ptr; 505 *ptr = MTX_UNOWNED; 506 *(ptr + 1) = 0; /* recurse counter */ 507#endif 508} 509 510/* Set set up registers on exec. */ 511void 512exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 513{ 514 struct trapframe *tf; 515 struct ps_strings arginfo; 516 517 tf = trapframe(td); 518 bzero(tf, sizeof *tf); 519 tf->fixreg[1] = -roundup(-stack + 8, 16); 520 521 /* 522 * XXX Machine-independent code has already copied arguments and 523 * XXX environment to userland. Get them back here. 524 */ 525 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 526 527 /* 528 * Set up arguments for _start(): 529 * _start(argc, argv, envp, obj, cleanup, ps_strings); 530 * 531 * Notes: 532 * - obj and cleanup are the auxilliary and termination 533 * vectors. They are fixed up by ld.elf_so. 534 * - ps_strings is a NetBSD extention, and will be 535 * ignored by executables which are strictly 536 * compliant with the SVR4 ABI. 537 * 538 * XXX We have to set both regs and retval here due to different 539 * XXX calling convention in trap.c and init_main.c. 540 */ 541 /* 542 * XXX PG: these get overwritten in the syscall return code. 543 * execve() should return EJUSTRETURN, like it does on NetBSD. 544 * Emulate by setting the syscall return value cells. The 545 * registers still have to be set for init's fork trampoline. 546 */ 547 td->td_retval[0] = arginfo.ps_nargvstr; 548 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 549 tf->fixreg[3] = arginfo.ps_nargvstr; 550 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 551 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 552 tf->fixreg[6] = 0; /* auxillary vector */ 553 tf->fixreg[7] = 0; /* termination vector */ 554 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 555 556 tf->srr0 = entry; 557 tf->srr1 = PSL_USERSET; 558 td->td_pcb->pcb_flags = 0; 559} 560 561int 562fill_regs(struct thread *td, struct reg *regs) 563{ 564 struct trapframe *tf; 565 566 tf = td->td_frame; 567 memcpy(regs, tf, sizeof(struct reg)); 568 569 return (0); 570} 571 572int 573fill_fpregs(struct thread *td, struct fpreg *fpregs) 574{ 575 576 return (0); 577} 578 579/* 580 * Flush the D-cache for non-DMA I/O so that the I-cache can 581 * be made coherent later. 582 */ 583void 584cpu_flush_dcache(void *ptr, size_t len) 585{ 586 /* TBD */ 587} 588 589/* 590 * Construct a PCB from a trapframe. This is called from kdb_trap() where 591 * we want to start a backtrace from the function that caused us to enter 592 * the debugger. We have the context in the trapframe, but base the trace 593 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 594 * enough for a backtrace. 595 */ 596void 597makectx(struct trapframe *tf, struct pcb *pcb) 598{ 599 600 pcb->pcb_lr = tf->srr0; 601 pcb->pcb_sp = tf->fixreg[1]; 602} 603 604/* 605 * get_mcontext/sendsig helper routine that doesn't touch the 606 * proc lock. 607 */ 608static int 609grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 610{ 611 struct pcb *pcb; 612 613 pcb = td->td_pcb; 614 memset(mcp, 0, sizeof(mcontext_t)); 615 616 mcp->mc_vers = _MC_VERSION; 617 mcp->mc_flags = 0; 618 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 619 if (flags & GET_MC_CLEAR_RET) { 620 mcp->mc_gpr[3] = 0; 621 mcp->mc_gpr[4] = 0; 622 } 623 624 /* XXX Altivec context ? */ 625 626 mcp->mc_len = sizeof(*mcp); 627 return (0); 628} 629 630int 631get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 632{ 633 int error; 634 635 error = grab_mcontext(td, mcp, flags); 636 if (error == 0) { 637 PROC_LOCK(curthread->td_proc); 638 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 639 PROC_UNLOCK(curthread->td_proc); 640 } 641 642 return (error); 643} 644 645int 646set_mcontext(struct thread *td, const mcontext_t *mcp) 647{ 648 struct pcb *pcb; 649 struct trapframe *tf; 650 651 pcb = td->td_pcb; 652 tf = td->td_frame; 653 654 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp)) 655 return (EINVAL); 656 657 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 658 659 /* XXX Altivec context? */ 660 661 return (0); 662} 663 664int 665sigreturn(struct thread *td, struct sigreturn_args *uap) 666{ 667 ucontext_t uc; 668 int error; 669 670 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 671 672 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 673 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 674 return (EFAULT); 675 } 676 677 error = set_mcontext(td, &uc.uc_mcontext); 678 if (error != 0) 679 return (error); 680 681 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 682 683 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 684 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 685 686 return (EJUSTRETURN); 687} 688 689#ifdef COMPAT_FREEBSD4 690int 691freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 692{ 693 694 return sigreturn(td, (struct sigreturn_args *)uap); 695} 696#endif 697 698/* 699 * cpu_idle 700 * 701 * Set Wait state enable. 702 */ 703void 704cpu_idle (int busy) 705{ 706 register_t msr; 707 708 msr = mfmsr(); 709#ifdef INVARIANTS 710 if ((msr & PSL_EE) != PSL_EE) { 711 struct thread *td = curthread; 712 printf("td msr %x\n", td->td_md.md_saved_msr); 713 panic("ints disabled in idleproc!"); 714 } 715#endif 716#if 0 717 /* 718 * Freescale E500 core RM section 6.4.1 719 */ 720 msr = msr | PSL_WE; 721 722 __asm__(" msync;" 723 " mtmsr %0;" 724 " isync;" 725 "loop: b loop" : 726 /* no output */ : 727 "r" (msr)); 728#endif 729} 730 731int 732cpu_idle_wakeup(int cpu) 733{ 734 735 return (0); 736} 737 738void 739spinlock_enter(void) 740{ 741 struct thread *td; 742 743 td = curthread; 744 if (td->td_md.md_spinlock_count == 0) 745 td->td_md.md_saved_msr = intr_disable(); 746 td->td_md.md_spinlock_count++; 747 critical_enter(); 748} 749 750void 751spinlock_exit(void) 752{ 753 struct thread *td; 754 755 td = curthread; 756 critical_exit(); 757 td->td_md.md_spinlock_count--; 758 if (td->td_md.md_spinlock_count == 0) 759 intr_restore(td->td_md.md_saved_msr); 760} 761 762/* Shutdown the CPU as much as possible. */ 763void 764cpu_halt(void) 765{ 766 767 mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE)); 768 while (1); 769} 770 771int 772set_regs(struct thread *td, struct reg *regs) 773{ 774 struct trapframe *tf; 775 776 tf = td->td_frame; 777 memcpy(tf, regs, sizeof(struct reg)); 778 return (0); 779} 780 781int 782fill_dbregs(struct thread *td, struct dbreg *dbregs) 783{ 784 785 /* No debug registers on PowerPC */ 786 return (ENOSYS); 787} 788 789int 790set_dbregs(struct thread *td, struct dbreg *dbregs) 791{ 792 793 /* No debug registers on PowerPC */ 794 return (ENOSYS); 795} 796 797int 798set_fpregs(struct thread *td, struct fpreg *fpregs) 799{ 800 801 return (0); 802} 803 804int 805ptrace_set_pc(struct thread *td, unsigned long addr) 806{ 807 struct trapframe *tf; 808 809 tf = td->td_frame; 810 tf->srr0 = (register_t)addr; 811 812 return (0); 813} 814 815int 816ptrace_single_step(struct thread *td) 817{ 818 struct trapframe *tf; 819 820 tf = td->td_frame; 821 tf->srr1 |= PSL_DE; 822 tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC); 823 return (0); 824} 825 826int 827ptrace_clear_single_step(struct thread *td) 828{ 829 struct trapframe *tf; 830 831 tf = td->td_frame; 832 tf->srr1 &= ~PSL_DE; 833 tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC); 834 return (0); 835} 836 837void 838kdb_cpu_clear_singlestep(void) 839{ 840 register_t r; 841 842 r = mfspr(SPR_DBCR0); 843 mtspr(SPR_DBCR0, r & ~DBCR0_IC); 844 kdb_frame->srr1 &= ~PSL_DE; 845} 846 847void 848kdb_cpu_set_singlestep(void) 849{ 850 register_t r; 851 852 r = mfspr(SPR_DBCR0); 853 mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM); 854 kdb_frame->srr1 |= PSL_DE; 855} 856 857void 858sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 859{ 860 struct trapframe *tf; 861 struct sigframe *sfp; 862 struct sigacts *psp; 863 struct sigframe sf; 864 struct thread *td; 865 struct proc *p; 866 int oonstack, rndfsize; 867 int sig, code; 868 869 td = curthread; 870 p = td->td_proc; 871 PROC_LOCK_ASSERT(p, MA_OWNED); 872 sig = ksi->ksi_signo; 873 code = ksi->ksi_code; 874 psp = p->p_sigacts; 875 mtx_assert(&psp->ps_mtx, MA_OWNED); 876 tf = td->td_frame; 877 oonstack = sigonstack(tf->fixreg[1]); 878 879 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 880 881 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 882 catcher, sig); 883 884 /* 885 * Save user context 886 */ 887 memset(&sf, 0, sizeof(sf)); 888 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 889 sf.sf_uc.uc_sigmask = *mask; 890 sf.sf_uc.uc_stack = td->td_sigstk; 891 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 892 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 893 894 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 895 896 /* 897 * Allocate and validate space for the signal handler context. 898 */ 899 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 900 SIGISMEMBER(psp->ps_sigonstack, sig)) { 901 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 902 td->td_sigstk.ss_size - rndfsize); 903 } else { 904 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 905 } 906 907 /* 908 * Translate the signal if appropriate (Linux emu ?) 909 */ 910 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 911 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 912 913 /* 914 * Save the floating-point state, if necessary, then copy it. 915 */ 916 /* XXX */ 917 918 /* 919 * Set up the registers to return to sigcode. 920 * 921 * r1/sp - sigframe ptr 922 * lr - sig function, dispatched to by blrl in trampoline 923 * r3 - sig number 924 * r4 - SIGINFO ? &siginfo : exception code 925 * r5 - user context 926 * srr0 - trampoline function addr 927 */ 928 tf->lr = (register_t)catcher; 929 tf->fixreg[1] = (register_t)sfp; 930 tf->fixreg[FIRSTARG] = sig; 931 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 932 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 933 /* 934 * Signal handler installed with SA_SIGINFO. 935 */ 936 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 937 938 /* 939 * Fill siginfo structure. 940 */ 941 sf.sf_si = ksi->ksi_info; 942 sf.sf_si.si_signo = sig; 943 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ? 944 tf->cpu.booke.dear : tf->srr0); 945 } else { 946 /* Old FreeBSD-style arguments. */ 947 tf->fixreg[FIRSTARG+1] = code; 948 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ? 949 tf->cpu.booke.dear : tf->srr0; 950 } 951 mtx_unlock(&psp->ps_mtx); 952 PROC_UNLOCK(p); 953 954 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 955 956 /* 957 * copy the frame out to userland. 958 */ 959 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 960 /* 961 * Process has trashed its stack. Kill it. 962 */ 963 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 964 PROC_LOCK(p); 965 sigexit(td, SIGILL); 966 } 967 968 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 969 tf->srr0, tf->fixreg[1]); 970 971 PROC_LOCK(p); 972 mtx_lock(&psp->ps_mtx); 973} 974 975void 976bzero(void *buf, size_t len) 977{ 978 caddr_t p; 979 980 p = buf; 981 982 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 983 *p++ = 0; 984 len--; 985 } 986 987 while (len >= sizeof(u_long) * 8) { 988 *(u_long*) p = 0; 989 *((u_long*) p + 1) = 0; 990 *((u_long*) p + 2) = 0; 991 *((u_long*) p + 3) = 0; 992 len -= sizeof(u_long) * 8; 993 *((u_long*) p + 4) = 0; 994 *((u_long*) p + 5) = 0; 995 *((u_long*) p + 6) = 0; 996 *((u_long*) p + 7) = 0; 997 p += sizeof(u_long) * 8; 998 } 999 1000 while (len >= sizeof(u_long)) { 1001 *(u_long*) p = 0; 1002 len -= sizeof(u_long); 1003 p += sizeof(u_long); 1004 } 1005 1006 while (len) { 1007 *p++ = 0; 1008 len--; 1009 } 1010} 1011 1012/* 1013 * XXX what is the better/proper place for this routine? 1014 */ 1015int 1016mem_valid(vm_offset_t addr, int len) 1017{ 1018 1019 return (1); 1020} 1021