machdep.c revision 186228
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 186228 2008-12-17 15:31:15Z raj $"); 83 84#include "opt_compat.h" 85#include "opt_kstack_pages.h" 86 87#include <sys/cdefs.h> 88#include <sys/types.h> 89#include <sys/param.h> 90#include <sys/proc.h> 91#include <sys/systm.h> 92#include <sys/time.h> 93#include <sys/bio.h> 94#include <sys/buf.h> 95#include <sys/bus.h> 96#include <sys/cons.h> 97#include <sys/cpu.h> 98#include <sys/kdb.h> 99#include <sys/kernel.h> 100#include <sys/lock.h> 101#include <sys/mutex.h> 102#include <sys/sysctl.h> 103#include <sys/exec.h> 104#include <sys/ktr.h> 105#include <sys/sysproto.h> 106#include <sys/signalvar.h> 107#include <sys/sysent.h> 108#include <sys/imgact.h> 109#include <sys/msgbuf.h> 110#include <sys/ptrace.h> 111 112#include <vm/vm.h> 113#include <vm/pmap.h> 114#include <vm/vm_page.h> 115#include <vm/vm_object.h> 116#include <vm/vm_pager.h> 117 118#include <machine/cpu.h> 119#include <machine/kdb.h> 120#include <machine/reg.h> 121#include <machine/vmparam.h> 122#include <machine/spr.h> 123#include <machine/hid.h> 124#include <machine/psl.h> 125#include <machine/trap.h> 126#include <machine/md_var.h> 127#include <machine/mmuvar.h> 128#include <machine/pmap.h> 129#include <machine/sigframe.h> 130#include <machine/metadata.h> 131#include <machine/bootinfo.h> 132#include <machine/powerpc.h> 133 134#include <sys/linker.h> 135#include <sys/reboot.h> 136 137#include <powerpc/mpc85xx/ocpbus.h> 138#include <powerpc/mpc85xx/mpc85xx.h> 139 140#ifdef DEBUG 141#define debugf(fmt, args...) printf(fmt, ##args) 142#else 143#define debugf(fmt, args...) 144#endif 145 146extern unsigned char kernel_text[]; 147extern unsigned char _etext[]; 148extern unsigned char _edata[]; 149extern unsigned char __bss_start[]; 150extern unsigned char __sbss_start[]; 151extern unsigned char __sbss_end[]; 152extern unsigned char _end[]; 153 154extern struct mem_region availmem_regions[]; 155extern int availmem_regions_sz; 156 157extern void dcache_enable(void); 158extern void dcache_inval(void); 159extern void icache_enable(void); 160extern void icache_inval(void); 161 162struct kva_md_info kmi; 163struct pcpu __pcpu[MAXCPU]; 164struct trapframe frame0; 165int cold = 1; 166long realmem = 0; 167long Maxmem = 0; 168 169struct bootinfo *bootinfo; 170 171char machine[] = "powerpc"; 172SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 173 174int cacheline_size = 32; 175 176SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 177 CTLFLAG_RD, &cacheline_size, 0, ""); 178 179static void cpu_e500_startup(void *); 180SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL); 181 182void print_kernel_section_addr(void); 183void print_bootinfo(void); 184void print_kenv(void); 185u_int e500_init(u_int32_t, u_int32_t, void *); 186 187static void 188cpu_e500_startup(void *dummy) 189{ 190 int indx, size; 191 192 /* Initialise the decrementer-based clock. */ 193 decr_init(); 194 195 /* Good {morning,afternoon,evening,night}. */ 196 cpu_setup(PCPU_GET(cpuid)); 197 198 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 199 ptoa(physmem) / 1048576); 200 realmem = physmem; 201 202 /* Display any holes after the first chunk of extended memory. */ 203 if (bootverbose) { 204 printf("Physical memory chunk(s):\n"); 205 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 206 size = phys_avail[indx + 1] - phys_avail[indx]; 207 208 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 209 phys_avail[indx], phys_avail[indx + 1] - 1, 210 size, size / PAGE_SIZE); 211 } 212 } 213 214 vm_ksubmap_init(&kmi); 215 216 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 217 ptoa(cnt.v_free_count) / 1048576); 218 219 /* Set up buffers, so they can be used to read disk labels. */ 220 bufinit(); 221 vm_pager_bufferinit(); 222} 223 224static char * 225kenv_next(char *cp) 226{ 227 228 if (cp != NULL) { 229 while (*cp != 0) 230 cp++; 231 cp++; 232 if (*cp == 0) 233 cp = NULL; 234 } 235 return (cp); 236} 237 238void 239print_kenv(void) 240{ 241 int len; 242 char *cp; 243 244 debugf("loader passed (static) kenv:\n"); 245 if (kern_envp == NULL) { 246 debugf(" no env, null ptr\n"); 247 return; 248 } 249 debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp); 250 251 len = 0; 252 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) 253 debugf(" %x %s\n", (u_int32_t)cp, cp); 254} 255 256void 257print_bootinfo(void) 258{ 259 struct bi_mem_region *mr; 260 struct bi_eth_addr *eth; 261 int i, j; 262 263 debugf("bootinfo:\n"); 264 if (bootinfo == NULL) { 265 debugf(" no bootinfo, null ptr\n"); 266 return; 267 } 268 269 debugf(" version = 0x%08x\n", bootinfo->bi_version); 270 debugf(" ccsrbar = 0x%08x\n", bootinfo->bi_bar_base); 271 debugf(" cpu_clk = 0x%08x\n", bootinfo->bi_cpu_clk); 272 debugf(" bus_clk = 0x%08x\n", bootinfo->bi_bus_clk); 273 274 debugf(" mem regions:\n"); 275 mr = (struct bi_mem_region *)bootinfo->bi_data; 276 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) 277 debugf(" #%d, base = 0x%08x, size = 0x%08x\n", i, 278 mr->mem_base, mr->mem_size); 279 280 debugf(" eth addresses:\n"); 281 eth = (struct bi_eth_addr *)mr; 282 for (i = 0; i < bootinfo->bi_eth_addr_no; i++, eth++) { 283 debugf(" #%d, addr = ", i); 284 for (j = 0; j < 6; j++) 285 debugf("%02x ", eth->mac_addr[j]); 286 debugf("\n"); 287 } 288} 289 290void 291print_kernel_section_addr(void) 292{ 293 294 debugf("kernel image addresses:\n"); 295 debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text); 296 debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); 297 debugf(" _edata = 0x%08x\n", (uint32_t)_edata); 298 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start); 299 debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end); 300 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start); 301 debugf(" _end = 0x%08x\n", (uint32_t)_end); 302} 303 304struct bi_mem_region * 305bootinfo_mr(void) 306{ 307 308 return ((struct bi_mem_region *)bootinfo->bi_data); 309} 310 311struct bi_eth_addr * 312bootinfo_eth(void) 313{ 314 struct bi_mem_region *mr; 315 struct bi_eth_addr *eth; 316 int i; 317 318 /* Advance to the eth section */ 319 mr = bootinfo_mr(); 320 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) 321 ; 322 323 eth = (struct bi_eth_addr *)mr; 324 return (eth); 325} 326 327u_int 328e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) 329{ 330 struct pcpu *pc; 331 void *kmdp; 332 vm_offset_t end; 333 struct bi_mem_region *mr; 334 uint32_t csr; 335 int i; 336 337 kmdp = NULL; 338 339 end = endkernel; 340 341 /* 342 * Parse metadata and fetch parameters. This must be done as the first 343 * step as we need bootinfo data to at least init the console 344 */ 345 if (mdp != NULL) { 346 preload_metadata = mdp; 347 kmdp = preload_search_by_type("elf kernel"); 348 if (kmdp != NULL) { 349 bootinfo = (struct bootinfo *)preload_search_info(kmdp, 350 MODINFO_METADATA | MODINFOMD_BOOTINFO); 351 352 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 353 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 354 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 355 } 356 } else { 357 /* 358 * We should scream but how? - without CCSR bar (in bootinfo) 359 * cannot even output anything... 360 */ 361 362 /* 363 * FIXME add return value and handle in the locore so we can 364 * return to the loader maybe? (this seems not very easy to 365 * restore everything as the TLB have all been reprogrammed 366 * in the locore etc...) 367 */ 368 while(1); 369 } 370 371 /* Initialize memory regions table */ 372 mr = bootinfo_mr(); 373 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) { 374 if (i == MEM_REGIONS) 375 break; 376 availmem_regions[i].mr_start = mr->mem_base; 377 availmem_regions[i].mr_size = mr->mem_size; 378 } 379 availmem_regions_sz = i; 380 381 /* Initialize TLB1 handling */ 382 tlb1_init(bootinfo->bi_bar_base); 383 384 /* 385 * Time Base and Decrementer are updated every 8 CCB bus clocks. 386 * HID0[SEL_TBCLK] = 0 387 */ 388 decr_config(bootinfo->bi_bus_clk / 8); 389 390 /* Init params/tunables that can be overridden by the loader. */ 391 init_param1(); 392 393 /* Start initializing proc0 and thread0. */ 394 proc_linkup(&proc0, &thread0); 395 thread0.td_frame = &frame0; 396 397 /* Set up per-cpu data and store the pointer in SPR general 0. */ 398 pc = &__pcpu[0]; 399 pcpu_init(pc, 0, sizeof(struct pcpu)); 400 pc->pc_curthread = &thread0; 401 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 402 403 /* Initialize system mutexes. */ 404 mutex_init(); 405 406 /* Initialize the console before printing anything. */ 407 cninit(); 408 409 /* Print out some debug info... */ 410 debugf("e500_init: console initialized\n"); 411 debugf(" arg1 startkernel = 0x%08x\n", startkernel); 412 debugf(" arg2 endkernel = 0x%08x\n", endkernel); 413 debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp); 414 debugf(" end = 0x%08x\n", (u_int32_t)end); 415 debugf(" boothowto = 0x%08x\n", boothowto); 416 debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA); 417 debugf(" MSR = 0x%08x\n", mfmsr()); 418 debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0)); 419 debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1)); 420 421 print_bootinfo(); 422 print_kernel_section_addr(); 423 print_kenv(); 424 //tlb1_print_entries(); 425 //tlb1_print_tlbentries(); 426 427 kdb_init(); 428 429#ifdef KDB 430 if (boothowto & RB_KDB) 431 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 432#endif 433 kobj_machdep_init(); 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/* Initialise a struct pcpu. */ 490void 491cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 492{ 493 494} 495 496/* Set set up registers on exec. */ 497void 498exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 499{ 500 struct trapframe *tf; 501 struct ps_strings arginfo; 502 503 tf = trapframe(td); 504 bzero(tf, sizeof *tf); 505 tf->fixreg[1] = -roundup(-stack + 8, 16); 506 507 /* 508 * XXX Machine-independent code has already copied arguments and 509 * XXX environment to userland. Get them back here. 510 */ 511 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 512 513 /* 514 * Set up arguments for _start(): 515 * _start(argc, argv, envp, obj, cleanup, ps_strings); 516 * 517 * Notes: 518 * - obj and cleanup are the auxilliary and termination 519 * vectors. They are fixed up by ld.elf_so. 520 * - ps_strings is a NetBSD extention, and will be 521 * ignored by executables which are strictly 522 * compliant with the SVR4 ABI. 523 * 524 * XXX We have to set both regs and retval here due to different 525 * XXX calling convention in trap.c and init_main.c. 526 */ 527 /* 528 * XXX PG: these get overwritten in the syscall return code. 529 * execve() should return EJUSTRETURN, like it does on NetBSD. 530 * Emulate by setting the syscall return value cells. The 531 * registers still have to be set for init's fork trampoline. 532 */ 533 td->td_retval[0] = arginfo.ps_nargvstr; 534 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 535 tf->fixreg[3] = arginfo.ps_nargvstr; 536 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 537 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 538 tf->fixreg[6] = 0; /* auxillary vector */ 539 tf->fixreg[7] = 0; /* termination vector */ 540 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 541 542 tf->srr0 = entry; 543 tf->srr1 = PSL_USERSET; 544 td->td_pcb->pcb_flags = 0; 545} 546 547int 548fill_regs(struct thread *td, struct reg *regs) 549{ 550 struct trapframe *tf; 551 552 tf = td->td_frame; 553 memcpy(regs, tf, sizeof(struct reg)); 554 555 return (0); 556} 557 558int 559fill_fpregs(struct thread *td, struct fpreg *fpregs) 560{ 561 562 return (0); 563} 564 565/* Get current clock frequency for the given cpu id. */ 566int 567cpu_est_clockrate(int cpu_id, uint64_t *rate) 568{ 569 570 return (ENXIO); 571} 572 573/* 574 * Construct a PCB from a trapframe. This is called from kdb_trap() where 575 * we want to start a backtrace from the function that caused us to enter 576 * the debugger. We have the context in the trapframe, but base the trace 577 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 578 * enough for a backtrace. 579 */ 580void 581makectx(struct trapframe *tf, struct pcb *pcb) 582{ 583 584 pcb->pcb_lr = tf->srr0; 585 pcb->pcb_sp = tf->fixreg[1]; 586} 587 588/* 589 * get_mcontext/sendsig helper routine that doesn't touch the 590 * proc lock. 591 */ 592static int 593grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 594{ 595 struct pcb *pcb; 596 597 pcb = td->td_pcb; 598 memset(mcp, 0, sizeof(mcontext_t)); 599 600 mcp->mc_vers = _MC_VERSION; 601 mcp->mc_flags = 0; 602 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 603 if (flags & GET_MC_CLEAR_RET) { 604 mcp->mc_gpr[3] = 0; 605 mcp->mc_gpr[4] = 0; 606 } 607 608 /* XXX Altivec context ? */ 609 610 mcp->mc_len = sizeof(*mcp); 611 return (0); 612} 613 614int 615get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 616{ 617 int error; 618 619 error = grab_mcontext(td, mcp, flags); 620 if (error == 0) { 621 PROC_LOCK(curthread->td_proc); 622 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 623 PROC_UNLOCK(curthread->td_proc); 624 } 625 626 return (error); 627} 628 629int 630set_mcontext(struct thread *td, const mcontext_t *mcp) 631{ 632 struct pcb *pcb; 633 struct trapframe *tf; 634 635 pcb = td->td_pcb; 636 tf = td->td_frame; 637 638 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp)) 639 return (EINVAL); 640 641 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 642 643 /* XXX Altivec context? */ 644 645 return (0); 646} 647 648int 649sigreturn(struct thread *td, struct sigreturn_args *uap) 650{ 651 struct proc *p; 652 ucontext_t uc; 653 int error; 654 655 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 656 657 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 658 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 659 return (EFAULT); 660 } 661 662 error = set_mcontext(td, &uc.uc_mcontext); 663 if (error != 0) 664 return (error); 665 666 p = td->td_proc; 667 PROC_LOCK(p); 668 td->td_sigmask = uc.uc_sigmask; 669 SIG_CANTMASK(td->td_sigmask); 670 signotify(td); 671 PROC_UNLOCK(p); 672 673 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 674 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 675 676 return (EJUSTRETURN); 677} 678 679#ifdef COMPAT_FREEBSD4 680int 681freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 682{ 683 684 return sigreturn(td, (struct sigreturn_args *)uap); 685} 686#endif 687 688/* 689 * cpu_idle 690 * 691 * Set Wait state enable. 692 */ 693void 694cpu_idle (int busy) 695{ 696 register_t msr; 697 698 msr = mfmsr(); 699#ifdef INVARIANTS 700 if ((msr & PSL_EE) != PSL_EE) { 701 struct thread *td = curthread; 702 printf("td msr %x\n", td->td_md.md_saved_msr); 703 panic("ints disabled in idleproc!"); 704 } 705#endif 706#if 0 707 /* 708 * Freescale E500 core RM section 6.4.1 709 */ 710 msr = msr | PSL_WE; 711 712 __asm__(" msync;" 713 " mtmsr %0;" 714 " isync;" 715 "loop: b loop" : 716 /* no output */ : 717 "r" (msr)); 718#endif 719} 720 721int 722cpu_idle_wakeup(int cpu) 723{ 724 725 return (0); 726} 727 728void 729spinlock_enter(void) 730{ 731 struct thread *td; 732 733 td = curthread; 734 if (td->td_md.md_spinlock_count == 0) 735 td->td_md.md_saved_msr = intr_disable(); 736 td->td_md.md_spinlock_count++; 737 critical_enter(); 738} 739 740void 741spinlock_exit(void) 742{ 743 struct thread *td; 744 745 td = curthread; 746 critical_exit(); 747 td->td_md.md_spinlock_count--; 748 if (td->td_md.md_spinlock_count == 0) 749 intr_restore(td->td_md.md_saved_msr); 750} 751 752/* Shutdown the CPU as much as possible. */ 753void 754cpu_halt(void) 755{ 756 757 mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE)); 758 while (1); 759} 760 761int 762set_regs(struct thread *td, struct reg *regs) 763{ 764 struct trapframe *tf; 765 766 tf = td->td_frame; 767 memcpy(tf, regs, sizeof(struct reg)); 768 return (0); 769} 770 771int 772fill_dbregs(struct thread *td, struct dbreg *dbregs) 773{ 774 775 /* No debug registers on PowerPC */ 776 return (ENOSYS); 777} 778 779int 780set_dbregs(struct thread *td, struct dbreg *dbregs) 781{ 782 783 /* No debug registers on PowerPC */ 784 return (ENOSYS); 785} 786 787int 788set_fpregs(struct thread *td, struct fpreg *fpregs) 789{ 790 791 return (0); 792} 793 794int 795ptrace_set_pc(struct thread *td, unsigned long addr) 796{ 797 struct trapframe *tf; 798 799 tf = td->td_frame; 800 tf->srr0 = (register_t)addr; 801 802 return (0); 803} 804 805int 806ptrace_single_step(struct thread *td) 807{ 808 struct trapframe *tf; 809 u_int reg; 810 811 reg = mfspr(SPR_DBCR0); 812 reg |= DBCR0_IC | DBCR0_IDM; 813 mtspr(SPR_DBCR0, reg); 814 815 tf = td->td_frame; 816 tf->srr1 |= PSL_DE; 817 return (0); 818} 819 820int 821ptrace_clear_single_step(struct thread *td) 822{ 823 struct trapframe *tf; 824 825 tf = td->td_frame; 826 tf->srr1 &= ~PSL_DE; 827 return (0); 828} 829 830void 831kdb_cpu_clear_singlestep(void) 832{ 833 register_t r; 834 835 r = mfspr(SPR_DBCR0); 836 mtspr(SPR_DBCR0, r & ~DBCR0_IC); 837 kdb_frame->srr1 &= ~PSL_DE; 838} 839 840void 841kdb_cpu_set_singlestep(void) 842{ 843 register_t r; 844 845 r = mfspr(SPR_DBCR0); 846 mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM); 847 kdb_frame->srr1 |= PSL_DE; 848} 849 850void 851sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 852{ 853 struct trapframe *tf; 854 struct sigframe *sfp; 855 struct sigacts *psp; 856 struct sigframe sf; 857 struct thread *td; 858 struct proc *p; 859 int oonstack, rndfsize; 860 int sig, code; 861 862 td = curthread; 863 p = td->td_proc; 864 PROC_LOCK_ASSERT(p, MA_OWNED); 865 sig = ksi->ksi_signo; 866 code = ksi->ksi_code; 867 psp = p->p_sigacts; 868 mtx_assert(&psp->ps_mtx, MA_OWNED); 869 tf = td->td_frame; 870 oonstack = sigonstack(tf->fixreg[1]); 871 872 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 873 874 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 875 catcher, sig); 876 877 /* 878 * Save user context 879 */ 880 memset(&sf, 0, sizeof(sf)); 881 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 882 sf.sf_uc.uc_sigmask = *mask; 883 sf.sf_uc.uc_stack = td->td_sigstk; 884 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 885 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 886 887 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 888 889 /* 890 * Allocate and validate space for the signal handler context. 891 */ 892 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 893 SIGISMEMBER(psp->ps_sigonstack, sig)) { 894 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 895 td->td_sigstk.ss_size - rndfsize); 896 } else { 897 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 898 } 899 900 /* 901 * Translate the signal if appropriate (Linux emu ?) 902 */ 903 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 904 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 905 906 /* 907 * Save the floating-point state, if necessary, then copy it. 908 */ 909 /* XXX */ 910 911 /* 912 * Set up the registers to return to sigcode. 913 * 914 * r1/sp - sigframe ptr 915 * lr - sig function, dispatched to by blrl in trampoline 916 * r3 - sig number 917 * r4 - SIGINFO ? &siginfo : exception code 918 * r5 - user context 919 * srr0 - trampoline function addr 920 */ 921 tf->lr = (register_t)catcher; 922 tf->fixreg[1] = (register_t)sfp; 923 tf->fixreg[FIRSTARG] = sig; 924 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 925 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 926 /* 927 * Signal handler installed with SA_SIGINFO. 928 */ 929 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 930 931 /* 932 * Fill siginfo structure. 933 */ 934 sf.sf_si = ksi->ksi_info; 935 sf.sf_si.si_signo = sig; 936 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ? 937 tf->cpu.booke.dear : tf->srr0); 938 } else { 939 /* Old FreeBSD-style arguments. */ 940 tf->fixreg[FIRSTARG+1] = code; 941 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ? 942 tf->cpu.booke.dear : tf->srr0; 943 } 944 mtx_unlock(&psp->ps_mtx); 945 PROC_UNLOCK(p); 946 947 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 948 949 /* 950 * copy the frame out to userland. 951 */ 952 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 953 /* 954 * Process has trashed its stack. Kill it. 955 */ 956 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 957 PROC_LOCK(p); 958 sigexit(td, SIGILL); 959 } 960 961 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 962 tf->srr0, tf->fixreg[1]); 963 964 PROC_LOCK(p); 965 mtx_lock(&psp->ps_mtx); 966} 967 968void 969bzero(void *buf, size_t len) 970{ 971 caddr_t p; 972 973 p = buf; 974 975 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 976 *p++ = 0; 977 len--; 978 } 979 980 while (len >= sizeof(u_long) * 8) { 981 *(u_long*) p = 0; 982 *((u_long*) p + 1) = 0; 983 *((u_long*) p + 2) = 0; 984 *((u_long*) p + 3) = 0; 985 len -= sizeof(u_long) * 8; 986 *((u_long*) p + 4) = 0; 987 *((u_long*) p + 5) = 0; 988 *((u_long*) p + 6) = 0; 989 *((u_long*) p + 7) = 0; 990 p += sizeof(u_long) * 8; 991 } 992 993 while (len >= sizeof(u_long)) { 994 *(u_long*) p = 0; 995 len -= sizeof(u_long); 996 p += sizeof(u_long); 997 } 998 999 while (len) { 1000 *p++ = 0; 1001 len--; 1002 } 1003} 1004 1005/* 1006 * XXX what is the better/proper place for this routine? 1007 */ 1008int 1009mem_valid(vm_offset_t addr, int len) 1010{ 1011 1012 return (1); 1013} 1014