machdep.c revision 298627
1/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */ 2 3/*- 4 * Copyright (c) 2004 Olivier Houchard 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Mark Brinicombe 22 * for the NetBSD Project. 23 * 4. The name of the company nor the name of the author may be used to 24 * endorse or promote products derived from this software without specific 25 * prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 28 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 29 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 31 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 32 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 33 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * Machine dependant functions for kernel setup 40 * 41 * Created : 17/09/94 42 * Updated : 18/04/01 updated for new wscons 43 */ 44 45#include "opt_compat.h" 46#include "opt_ddb.h" 47#include "opt_kstack_pages.h" 48#include "opt_platform.h" 49#include "opt_sched.h" 50#include "opt_timer.h" 51 52#include <sys/cdefs.h> 53__FBSDID("$FreeBSD: head/sys/arm/arm/machdep.c 298627 2016-04-26 11:53:37Z br $"); 54 55#include <sys/param.h> 56#include <sys/proc.h> 57#include <sys/systm.h> 58#include <sys/bio.h> 59#include <sys/buf.h> 60#include <sys/bus.h> 61#include <sys/cons.h> 62#include <sys/cpu.h> 63#include <sys/ctype.h> 64#include <sys/devmap.h> 65#include <sys/efi.h> 66#include <sys/exec.h> 67#include <sys/imgact.h> 68#include <sys/kdb.h> 69#include <sys/kernel.h> 70#include <sys/ktr.h> 71#include <sys/linker.h> 72#include <sys/lock.h> 73#include <sys/malloc.h> 74#include <sys/msgbuf.h> 75#include <sys/mutex.h> 76#include <sys/pcpu.h> 77#include <sys/ptrace.h> 78#include <sys/reboot.h> 79#include <sys/boot.h> 80#include <sys/rwlock.h> 81#include <sys/sched.h> 82#include <sys/signalvar.h> 83#include <sys/syscallsubr.h> 84#include <sys/sysctl.h> 85#include <sys/sysent.h> 86#include <sys/sysproto.h> 87#include <sys/uio.h> 88#include <sys/vdso.h> 89 90#include <vm/vm.h> 91#include <vm/pmap.h> 92#include <vm/vm_map.h> 93#include <vm/vm_object.h> 94#include <vm/vm_page.h> 95#include <vm/vm_pager.h> 96 97#include <machine/acle-compat.h> 98#include <machine/armreg.h> 99#include <machine/atags.h> 100#include <machine/cpu.h> 101#include <machine/cpuinfo.h> 102#include <machine/debug_monitor.h> 103#include <machine/db_machdep.h> 104#include <machine/frame.h> 105#include <machine/intr.h> 106#include <machine/machdep.h> 107#include <machine/md_var.h> 108#include <machine/metadata.h> 109#include <machine/pcb.h> 110#include <machine/physmem.h> 111#include <machine/platform.h> 112#include <machine/reg.h> 113#include <machine/trap.h> 114#include <machine/undefined.h> 115#include <machine/vfp.h> 116#include <machine/vmparam.h> 117#include <machine/sysarch.h> 118 119#ifdef FDT 120#include <contrib/libfdt/libfdt.h> 121#include <dev/fdt/fdt_common.h> 122#include <dev/ofw/openfirm.h> 123#endif 124 125#ifdef DDB 126#include <ddb/ddb.h> 127 128#if __ARM_ARCH >= 6 129 130DB_SHOW_COMMAND(cp15, db_show_cp15) 131{ 132 u_int reg; 133 134 reg = cp15_midr_get(); 135 db_printf("Cpu ID: 0x%08x\n", reg); 136 reg = cp15_ctr_get(); 137 db_printf("Current Cache Lvl ID: 0x%08x\n",reg); 138 139 reg = cp15_sctlr_get(); 140 db_printf("Ctrl: 0x%08x\n",reg); 141 reg = cp15_actlr_get(); 142 db_printf("Aux Ctrl: 0x%08x\n",reg); 143 144 reg = cp15_id_pfr0_get(); 145 db_printf("Processor Feat 0: 0x%08x\n", reg); 146 reg = cp15_id_pfr1_get(); 147 db_printf("Processor Feat 1: 0x%08x\n", reg); 148 reg = cp15_id_dfr0_get(); 149 db_printf("Debug Feat 0: 0x%08x\n", reg); 150 reg = cp15_id_afr0_get(); 151 db_printf("Auxiliary Feat 0: 0x%08x\n", reg); 152 reg = cp15_id_mmfr0_get(); 153 db_printf("Memory Model Feat 0: 0x%08x\n", reg); 154 reg = cp15_id_mmfr1_get(); 155 db_printf("Memory Model Feat 1: 0x%08x\n", reg); 156 reg = cp15_id_mmfr2_get(); 157 db_printf("Memory Model Feat 2: 0x%08x\n", reg); 158 reg = cp15_id_mmfr3_get(); 159 db_printf("Memory Model Feat 3: 0x%08x\n", reg); 160 reg = cp15_ttbr_get(); 161 db_printf("TTB0: 0x%08x\n", reg); 162} 163 164DB_SHOW_COMMAND(vtop, db_show_vtop) 165{ 166 u_int reg; 167 168 if (have_addr) { 169 cp15_ats1cpr_set(addr); 170 reg = cp15_par_get(); 171 db_printf("Physical address reg: 0x%08x\n",reg); 172 } else 173 db_printf("show vtop <virt_addr>\n"); 174} 175#endif /* __ARM_ARCH >= 6 */ 176#endif /* DDB */ 177 178#ifdef DEBUG 179#define debugf(fmt, args...) printf(fmt, ##args) 180#else 181#define debugf(fmt, args...) 182#endif 183 184#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 185 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \ 186 defined(COMPAT_FREEBSD9) 187#error FreeBSD/arm doesn't provide compatibility with releases prior to 10 188#endif 189 190struct pcpu __pcpu[MAXCPU]; 191struct pcpu *pcpup = &__pcpu[0]; 192 193static struct trapframe proc0_tf; 194uint32_t cpu_reset_address = 0; 195int cold = 1; 196vm_offset_t vector_page; 197 198int (*_arm_memcpy)(void *, void *, int, int) = NULL; 199int (*_arm_bzero)(void *, int, int) = NULL; 200int _min_memcpy_size = 0; 201int _min_bzero_size = 0; 202 203extern int *end; 204 205#ifdef FDT 206static char *loader_envp; 207 208vm_paddr_t pmap_pa; 209 210#if __ARM_ARCH >= 6 211vm_offset_t systempage; 212vm_offset_t irqstack; 213vm_offset_t undstack; 214vm_offset_t abtstack; 215#else 216/* 217 * This is the number of L2 page tables required for covering max 218 * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 219 * stacks etc.), uprounded to be divisible by 4. 220 */ 221#define KERNEL_PT_MAX 78 222 223static struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 224 225struct pv_addr systempage; 226static struct pv_addr msgbufpv; 227struct pv_addr irqstack; 228struct pv_addr undstack; 229struct pv_addr abtstack; 230static struct pv_addr kernelstack; 231#endif 232#endif 233 234#if defined(LINUX_BOOT_ABI) 235#define LBABI_MAX_BANKS 10 236 237#define CMDLINE_GUARD "FreeBSD:" 238uint32_t board_id; 239struct arm_lbabi_tag *atag_list; 240char linux_command_line[LBABI_MAX_COMMAND_LINE + 1]; 241char atags[LBABI_MAX_COMMAND_LINE * 2]; 242uint32_t memstart[LBABI_MAX_BANKS]; 243uint32_t memsize[LBABI_MAX_BANKS]; 244uint32_t membanks; 245#endif 246 247static uint32_t board_revision; 248/* hex representation of uint64_t */ 249static char board_serial[32]; 250 251SYSCTL_NODE(_hw, OID_AUTO, board, CTLFLAG_RD, 0, "Board attributes"); 252SYSCTL_UINT(_hw_board, OID_AUTO, revision, CTLFLAG_RD, 253 &board_revision, 0, "Board revision"); 254SYSCTL_STRING(_hw_board, OID_AUTO, serial, CTLFLAG_RD, 255 board_serial, 0, "Board serial"); 256 257int vfp_exists; 258SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD, 259 &vfp_exists, 0, "Floating point support enabled"); 260 261void 262board_set_serial(uint64_t serial) 263{ 264 265 snprintf(board_serial, sizeof(board_serial)-1, 266 "%016jx", serial); 267} 268 269void 270board_set_revision(uint32_t revision) 271{ 272 273 board_revision = revision; 274} 275 276void 277sendsig(catcher, ksi, mask) 278 sig_t catcher; 279 ksiginfo_t *ksi; 280 sigset_t *mask; 281{ 282 struct thread *td; 283 struct proc *p; 284 struct trapframe *tf; 285 struct sigframe *fp, frame; 286 struct sigacts *psp; 287 struct sysentvec *sysent; 288 int onstack; 289 int sig; 290 int code; 291 292 td = curthread; 293 p = td->td_proc; 294 PROC_LOCK_ASSERT(p, MA_OWNED); 295 sig = ksi->ksi_signo; 296 code = ksi->ksi_code; 297 psp = p->p_sigacts; 298 mtx_assert(&psp->ps_mtx, MA_OWNED); 299 tf = td->td_frame; 300 onstack = sigonstack(tf->tf_usr_sp); 301 302 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 303 catcher, sig); 304 305 /* Allocate and validate space for the signal handler context. */ 306 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !(onstack) && 307 SIGISMEMBER(psp->ps_sigonstack, sig)) { 308 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 309 td->td_sigstk.ss_size); 310#if defined(COMPAT_43) 311 td->td_sigstk.ss_flags |= SS_ONSTACK; 312#endif 313 } else 314 fp = (struct sigframe *)td->td_frame->tf_usr_sp; 315 316 /* make room on the stack */ 317 fp--; 318 319 /* make the stack aligned */ 320 fp = (struct sigframe *)STACKALIGN(fp); 321 /* Populate the siginfo frame. */ 322 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); 323 frame.sf_si = ksi->ksi_info; 324 frame.sf_uc.uc_sigmask = *mask; 325 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK ) 326 ? ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE; 327 frame.sf_uc.uc_stack = td->td_sigstk; 328 mtx_unlock(&psp->ps_mtx); 329 PROC_UNLOCK(td->td_proc); 330 331 /* Copy the sigframe out to the user's stack. */ 332 if (copyout(&frame, fp, sizeof(*fp)) != 0) { 333 /* Process has trashed its stack. Kill it. */ 334 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 335 PROC_LOCK(p); 336 sigexit(td, SIGILL); 337 } 338 339 /* 340 * Build context to run handler in. We invoke the handler 341 * directly, only returning via the trampoline. Note the 342 * trampoline version numbers are coordinated with machine- 343 * dependent code in libc. 344 */ 345 346 tf->tf_r0 = sig; 347 tf->tf_r1 = (register_t)&fp->sf_si; 348 tf->tf_r2 = (register_t)&fp->sf_uc; 349 350 /* the trampoline uses r5 as the uc address */ 351 tf->tf_r5 = (register_t)&fp->sf_uc; 352 tf->tf_pc = (register_t)catcher; 353 tf->tf_usr_sp = (register_t)fp; 354 sysent = p->p_sysent; 355 if (sysent->sv_sigcode_base != 0) 356 tf->tf_usr_lr = (register_t)sysent->sv_sigcode_base; 357 else 358 tf->tf_usr_lr = (register_t)(sysent->sv_psstrings - 359 *(sysent->sv_szsigcode)); 360 /* Set the mode to enter in the signal handler */ 361#if __ARM_ARCH >= 7 362 if ((register_t)catcher & 1) 363 tf->tf_spsr |= PSR_T; 364 else 365 tf->tf_spsr &= ~PSR_T; 366#endif 367 368 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr, 369 tf->tf_usr_sp); 370 371 PROC_LOCK(p); 372 mtx_lock(&psp->ps_mtx); 373} 374 375struct kva_md_info kmi; 376 377/* 378 * arm32_vector_init: 379 * 380 * Initialize the vector page, and select whether or not to 381 * relocate the vectors. 382 * 383 * NOTE: We expect the vector page to be mapped at its expected 384 * destination. 385 */ 386 387extern unsigned int page0[], page0_data[]; 388void 389arm_vector_init(vm_offset_t va, int which) 390{ 391 unsigned int *vectors = (int *) va; 392 unsigned int *vectors_data = vectors + (page0_data - page0); 393 int vec; 394 395 /* 396 * Loop through the vectors we're taking over, and copy the 397 * vector's insn and data word. 398 */ 399 for (vec = 0; vec < ARM_NVEC; vec++) { 400 if ((which & (1 << vec)) == 0) { 401 /* Don't want to take over this vector. */ 402 continue; 403 } 404 vectors[vec] = page0[vec]; 405 vectors_data[vec] = page0_data[vec]; 406 } 407 408 /* Now sync the vectors. */ 409 icache_sync(va, (ARM_NVEC * 2) * sizeof(u_int)); 410 411 vector_page = va; 412 413 if (va == ARM_VECTORS_HIGH) { 414 /* 415 * Assume the MD caller knows what it's doing here, and 416 * really does want the vector page relocated. 417 * 418 * Note: This has to be done here (and not just in 419 * cpu_setup()) because the vector page needs to be 420 * accessible *before* cpu_startup() is called. 421 * Think ddb(9) ... 422 * 423 * NOTE: If the CPU control register is not readable, 424 * this will totally fail! We'll just assume that 425 * any system that has high vector support has a 426 * readable CPU control register, for now. If we 427 * ever encounter one that does not, we'll have to 428 * rethink this. 429 */ 430 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 431 } 432} 433 434static void 435cpu_startup(void *dummy) 436{ 437 struct pcb *pcb = thread0.td_pcb; 438 const unsigned int mbyte = 1024 * 1024; 439#if __ARM_ARCH < 6 && !defined(ARM_CACHE_LOCK_ENABLE) 440 vm_page_t m; 441#endif 442 443 identify_arm_cpu(); 444 445 vm_ksubmap_init(&kmi); 446 447 /* 448 * Display the RAM layout. 449 */ 450 printf("real memory = %ju (%ju MB)\n", 451 (uintmax_t)arm32_ptob(realmem), 452 (uintmax_t)arm32_ptob(realmem) / mbyte); 453 printf("avail memory = %ju (%ju MB)\n", 454 (uintmax_t)arm32_ptob(vm_cnt.v_free_count), 455 (uintmax_t)arm32_ptob(vm_cnt.v_free_count) / mbyte); 456 if (bootverbose) { 457 arm_physmem_print_tables(); 458 devmap_print_table(); 459 } 460 461 bufinit(); 462 vm_pager_bufferinit(); 463 pcb->pcb_regs.sf_sp = (u_int)thread0.td_kstack + 464 USPACE_SVC_STACK_TOP; 465 pmap_set_pcb_pagedir(kernel_pmap, pcb); 466#if __ARM_ARCH < 6 467 vector_page_setprot(VM_PROT_READ); 468 pmap_postinit(); 469#ifdef ARM_CACHE_LOCK_ENABLE 470 pmap_kenter_user(ARM_TP_ADDRESS, ARM_TP_ADDRESS); 471 arm_lock_cache_line(ARM_TP_ADDRESS); 472#else 473 m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_ZERO); 474 pmap_kenter_user(ARM_TP_ADDRESS, VM_PAGE_TO_PHYS(m)); 475#endif 476 *(uint32_t *)ARM_RAS_START = 0; 477 *(uint32_t *)ARM_RAS_END = 0xffffffff; 478#endif 479} 480 481SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 482 483/* 484 * Flush the D-cache for non-DMA I/O so that the I-cache can 485 * be made coherent later. 486 */ 487void 488cpu_flush_dcache(void *ptr, size_t len) 489{ 490 491 dcache_wb_poc((vm_offset_t)ptr, (vm_paddr_t)vtophys(ptr), len); 492} 493 494/* Get current clock frequency for the given cpu id. */ 495int 496cpu_est_clockrate(int cpu_id, uint64_t *rate) 497{ 498 499 return (ENXIO); 500} 501 502void 503cpu_idle(int busy) 504{ 505 506 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", busy, curcpu); 507 spinlock_enter(); 508#ifndef NO_EVENTTIMERS 509 if (!busy) 510 cpu_idleclock(); 511#endif 512 if (!sched_runnable()) 513 cpu_sleep(0); 514#ifndef NO_EVENTTIMERS 515 if (!busy) 516 cpu_activeclock(); 517#endif 518 spinlock_exit(); 519 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done", busy, curcpu); 520} 521 522int 523cpu_idle_wakeup(int cpu) 524{ 525 526 return (0); 527} 528 529/* 530 * Most ARM platforms don't need to do anything special to init their clocks 531 * (they get intialized during normal device attachment), and by not defining a 532 * cpu_initclocks() function they get this generic one. Any platform that needs 533 * to do something special can just provide their own implementation, which will 534 * override this one due to the weak linkage. 535 */ 536void 537arm_generic_initclocks(void) 538{ 539 540#ifndef NO_EVENTTIMERS 541#ifdef SMP 542 if (PCPU_GET(cpuid) == 0) 543 cpu_initclocks_bsp(); 544 else 545 cpu_initclocks_ap(); 546#else 547 cpu_initclocks_bsp(); 548#endif 549#endif 550} 551__weak_reference(arm_generic_initclocks, cpu_initclocks); 552 553int 554fill_regs(struct thread *td, struct reg *regs) 555{ 556 struct trapframe *tf = td->td_frame; 557 bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 558 regs->r_sp = tf->tf_usr_sp; 559 regs->r_lr = tf->tf_usr_lr; 560 regs->r_pc = tf->tf_pc; 561 regs->r_cpsr = tf->tf_spsr; 562 return (0); 563} 564int 565fill_fpregs(struct thread *td, struct fpreg *regs) 566{ 567 bzero(regs, sizeof(*regs)); 568 return (0); 569} 570 571int 572set_regs(struct thread *td, struct reg *regs) 573{ 574 struct trapframe *tf = td->td_frame; 575 576 bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 577 tf->tf_usr_sp = regs->r_sp; 578 tf->tf_usr_lr = regs->r_lr; 579 tf->tf_pc = regs->r_pc; 580 tf->tf_spsr &= ~PSR_FLAGS; 581 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 582 return (0); 583} 584 585int 586set_fpregs(struct thread *td, struct fpreg *regs) 587{ 588 return (0); 589} 590 591int 592fill_dbregs(struct thread *td, struct dbreg *regs) 593{ 594 return (0); 595} 596int 597set_dbregs(struct thread *td, struct dbreg *regs) 598{ 599 return (0); 600} 601 602 603static int 604ptrace_read_int(struct thread *td, vm_offset_t addr, uint32_t *v) 605{ 606 607 if (proc_readmem(td, td->td_proc, addr, v, sizeof(*v)) != sizeof(*v)) 608 return (ENOMEM); 609 return (0); 610} 611 612static int 613ptrace_write_int(struct thread *td, vm_offset_t addr, uint32_t v) 614{ 615 616 if (proc_writemem(td, td->td_proc, addr, &v, sizeof(v)) != sizeof(v)) 617 return (ENOMEM); 618 return (0); 619} 620 621static u_int 622ptrace_get_usr_reg(void *cookie, int reg) 623{ 624 int ret; 625 struct thread *td = cookie; 626 627 KASSERT(((reg >= 0) && (reg <= ARM_REG_NUM_PC)), 628 ("reg is outside range")); 629 630 switch(reg) { 631 case ARM_REG_NUM_PC: 632 ret = td->td_frame->tf_pc; 633 break; 634 case ARM_REG_NUM_LR: 635 ret = td->td_frame->tf_usr_lr; 636 break; 637 case ARM_REG_NUM_SP: 638 ret = td->td_frame->tf_usr_sp; 639 break; 640 default: 641 ret = *((register_t*)&td->td_frame->tf_r0 + reg); 642 break; 643 } 644 645 return (ret); 646} 647 648static u_int 649ptrace_get_usr_int(void* cookie, vm_offset_t offset, u_int* val) 650{ 651 struct thread *td = cookie; 652 u_int error; 653 654 error = ptrace_read_int(td, offset, val); 655 656 return (error); 657} 658 659/** 660 * This function parses current instruction opcode and decodes 661 * any possible jump (change in PC) which might occur after 662 * the instruction is executed. 663 * 664 * @param td Thread structure of analysed task 665 * @param cur_instr Currently executed instruction 666 * @param alt_next_address Pointer to the variable where 667 * the destination address of the 668 * jump instruction shall be stored. 669 * 670 * @return <0> when jump is possible 671 * <EINVAL> otherwise 672 */ 673static int 674ptrace_get_alternative_next(struct thread *td, uint32_t cur_instr, 675 uint32_t *alt_next_address) 676{ 677 int error; 678 679 if (inst_branch(cur_instr) || inst_call(cur_instr) || 680 inst_return(cur_instr)) { 681 error = arm_predict_branch(td, cur_instr, td->td_frame->tf_pc, 682 alt_next_address, ptrace_get_usr_reg, ptrace_get_usr_int); 683 684 return (error); 685 } 686 687 return (EINVAL); 688} 689 690int 691ptrace_single_step(struct thread *td) 692{ 693 struct proc *p; 694 int error, error_alt; 695 uint32_t cur_instr, alt_next = 0; 696 697 /* TODO: This needs to be updated for Thumb-2 */ 698 if ((td->td_frame->tf_spsr & PSR_T) != 0) 699 return (EINVAL); 700 701 KASSERT(td->td_md.md_ptrace_instr == 0, 702 ("Didn't clear single step")); 703 KASSERT(td->td_md.md_ptrace_instr_alt == 0, 704 ("Didn't clear alternative single step")); 705 p = td->td_proc; 706 PROC_UNLOCK(p); 707 708 error = ptrace_read_int(td, td->td_frame->tf_pc, 709 &cur_instr); 710 if (error) 711 goto out; 712 713 error = ptrace_read_int(td, td->td_frame->tf_pc + INSN_SIZE, 714 &td->td_md.md_ptrace_instr); 715 if (error == 0) { 716 error = ptrace_write_int(td, td->td_frame->tf_pc + INSN_SIZE, 717 PTRACE_BREAKPOINT); 718 if (error) { 719 td->td_md.md_ptrace_instr = 0; 720 } else { 721 td->td_md.md_ptrace_addr = td->td_frame->tf_pc + 722 INSN_SIZE; 723 } 724 } 725 726 error_alt = ptrace_get_alternative_next(td, cur_instr, &alt_next); 727 if (error_alt == 0) { 728 error_alt = ptrace_read_int(td, alt_next, 729 &td->td_md.md_ptrace_instr_alt); 730 if (error_alt) { 731 td->td_md.md_ptrace_instr_alt = 0; 732 } else { 733 error_alt = ptrace_write_int(td, alt_next, 734 PTRACE_BREAKPOINT); 735 if (error_alt) 736 td->td_md.md_ptrace_instr_alt = 0; 737 else 738 td->td_md.md_ptrace_addr_alt = alt_next; 739 } 740 } 741 742out: 743 PROC_LOCK(p); 744 return ((error != 0) && (error_alt != 0)); 745} 746 747int 748ptrace_clear_single_step(struct thread *td) 749{ 750 struct proc *p; 751 752 /* TODO: This needs to be updated for Thumb-2 */ 753 if ((td->td_frame->tf_spsr & PSR_T) != 0) 754 return (EINVAL); 755 756 if (td->td_md.md_ptrace_instr != 0) { 757 p = td->td_proc; 758 PROC_UNLOCK(p); 759 ptrace_write_int(td, td->td_md.md_ptrace_addr, 760 td->td_md.md_ptrace_instr); 761 PROC_LOCK(p); 762 td->td_md.md_ptrace_instr = 0; 763 } 764 765 if (td->td_md.md_ptrace_instr_alt != 0) { 766 p = td->td_proc; 767 PROC_UNLOCK(p); 768 ptrace_write_int(td, td->td_md.md_ptrace_addr_alt, 769 td->td_md.md_ptrace_instr_alt); 770 PROC_LOCK(p); 771 td->td_md.md_ptrace_instr_alt = 0; 772 } 773 774 return (0); 775} 776 777int 778ptrace_set_pc(struct thread *td, unsigned long addr) 779{ 780 td->td_frame->tf_pc = addr; 781 return (0); 782} 783 784void 785cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 786{ 787} 788 789void 790spinlock_enter(void) 791{ 792 struct thread *td; 793 register_t cspr; 794 795 td = curthread; 796 if (td->td_md.md_spinlock_count == 0) { 797 cspr = disable_interrupts(PSR_I | PSR_F); 798 td->td_md.md_spinlock_count = 1; 799 td->td_md.md_saved_cspr = cspr; 800 } else 801 td->td_md.md_spinlock_count++; 802 critical_enter(); 803} 804 805void 806spinlock_exit(void) 807{ 808 struct thread *td; 809 register_t cspr; 810 811 td = curthread; 812 critical_exit(); 813 cspr = td->td_md.md_saved_cspr; 814 td->td_md.md_spinlock_count--; 815 if (td->td_md.md_spinlock_count == 0) 816 restore_interrupts(cspr); 817} 818 819/* 820 * Clear registers on exec 821 */ 822void 823exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 824{ 825 struct trapframe *tf = td->td_frame; 826 827 memset(tf, 0, sizeof(*tf)); 828 tf->tf_usr_sp = stack; 829 tf->tf_usr_lr = imgp->entry_addr; 830 tf->tf_svc_lr = 0x77777777; 831 tf->tf_pc = imgp->entry_addr; 832 tf->tf_spsr = PSR_USR32_MODE; 833} 834 835/* 836 * Get machine context. 837 */ 838int 839get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 840{ 841 struct trapframe *tf = td->td_frame; 842 __greg_t *gr = mcp->__gregs; 843 844 if (clear_ret & GET_MC_CLEAR_RET) { 845 gr[_REG_R0] = 0; 846 gr[_REG_CPSR] = tf->tf_spsr & ~PSR_C; 847 } else { 848 gr[_REG_R0] = tf->tf_r0; 849 gr[_REG_CPSR] = tf->tf_spsr; 850 } 851 gr[_REG_R1] = tf->tf_r1; 852 gr[_REG_R2] = tf->tf_r2; 853 gr[_REG_R3] = tf->tf_r3; 854 gr[_REG_R4] = tf->tf_r4; 855 gr[_REG_R5] = tf->tf_r5; 856 gr[_REG_R6] = tf->tf_r6; 857 gr[_REG_R7] = tf->tf_r7; 858 gr[_REG_R8] = tf->tf_r8; 859 gr[_REG_R9] = tf->tf_r9; 860 gr[_REG_R10] = tf->tf_r10; 861 gr[_REG_R11] = tf->tf_r11; 862 gr[_REG_R12] = tf->tf_r12; 863 gr[_REG_SP] = tf->tf_usr_sp; 864 gr[_REG_LR] = tf->tf_usr_lr; 865 gr[_REG_PC] = tf->tf_pc; 866 867 return (0); 868} 869 870/* 871 * Set machine context. 872 * 873 * However, we don't set any but the user modifiable flags, and we won't 874 * touch the cs selector. 875 */ 876int 877set_mcontext(struct thread *td, mcontext_t *mcp) 878{ 879 struct trapframe *tf = td->td_frame; 880 const __greg_t *gr = mcp->__gregs; 881 882 tf->tf_r0 = gr[_REG_R0]; 883 tf->tf_r1 = gr[_REG_R1]; 884 tf->tf_r2 = gr[_REG_R2]; 885 tf->tf_r3 = gr[_REG_R3]; 886 tf->tf_r4 = gr[_REG_R4]; 887 tf->tf_r5 = gr[_REG_R5]; 888 tf->tf_r6 = gr[_REG_R6]; 889 tf->tf_r7 = gr[_REG_R7]; 890 tf->tf_r8 = gr[_REG_R8]; 891 tf->tf_r9 = gr[_REG_R9]; 892 tf->tf_r10 = gr[_REG_R10]; 893 tf->tf_r11 = gr[_REG_R11]; 894 tf->tf_r12 = gr[_REG_R12]; 895 tf->tf_usr_sp = gr[_REG_SP]; 896 tf->tf_usr_lr = gr[_REG_LR]; 897 tf->tf_pc = gr[_REG_PC]; 898 tf->tf_spsr = gr[_REG_CPSR]; 899 900 return (0); 901} 902 903/* 904 * MPSAFE 905 */ 906int 907sys_sigreturn(td, uap) 908 struct thread *td; 909 struct sigreturn_args /* { 910 const struct __ucontext *sigcntxp; 911 } */ *uap; 912{ 913 ucontext_t uc; 914 int spsr; 915 916 if (uap == NULL) 917 return (EFAULT); 918 if (copyin(uap->sigcntxp, &uc, sizeof(uc))) 919 return (EFAULT); 920 /* 921 * Make sure the processor mode has not been tampered with and 922 * interrupts have not been disabled. 923 */ 924 spsr = uc.uc_mcontext.__gregs[_REG_CPSR]; 925 if ((spsr & PSR_MODE) != PSR_USR32_MODE || 926 (spsr & (PSR_I | PSR_F)) != 0) 927 return (EINVAL); 928 /* Restore register context. */ 929 set_mcontext(td, &uc.uc_mcontext); 930 931 /* Restore signal mask. */ 932 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 933 934 return (EJUSTRETURN); 935} 936 937 938/* 939 * Construct a PCB from a trapframe. This is called from kdb_trap() where 940 * we want to start a backtrace from the function that caused us to enter 941 * the debugger. We have the context in the trapframe, but base the trace 942 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 943 * enough for a backtrace. 944 */ 945void 946makectx(struct trapframe *tf, struct pcb *pcb) 947{ 948 pcb->pcb_regs.sf_r4 = tf->tf_r4; 949 pcb->pcb_regs.sf_r5 = tf->tf_r5; 950 pcb->pcb_regs.sf_r6 = tf->tf_r6; 951 pcb->pcb_regs.sf_r7 = tf->tf_r7; 952 pcb->pcb_regs.sf_r8 = tf->tf_r8; 953 pcb->pcb_regs.sf_r9 = tf->tf_r9; 954 pcb->pcb_regs.sf_r10 = tf->tf_r10; 955 pcb->pcb_regs.sf_r11 = tf->tf_r11; 956 pcb->pcb_regs.sf_r12 = tf->tf_r12; 957 pcb->pcb_regs.sf_pc = tf->tf_pc; 958 pcb->pcb_regs.sf_lr = tf->tf_usr_lr; 959 pcb->pcb_regs.sf_sp = tf->tf_usr_sp; 960} 961 962/* 963 * Fake up a boot descriptor table 964 */ 965vm_offset_t 966fake_preload_metadata(struct arm_boot_params *abp __unused, void *dtb_ptr, 967 size_t dtb_size) 968{ 969#ifdef DDB 970 vm_offset_t zstart = 0, zend = 0; 971#endif 972 vm_offset_t lastaddr; 973 int i = 0; 974 static uint32_t fake_preload[35]; 975 976 fake_preload[i++] = MODINFO_NAME; 977 fake_preload[i++] = strlen("kernel") + 1; 978 strcpy((char*)&fake_preload[i++], "kernel"); 979 i += 1; 980 fake_preload[i++] = MODINFO_TYPE; 981 fake_preload[i++] = strlen("elf kernel") + 1; 982 strcpy((char*)&fake_preload[i++], "elf kernel"); 983 i += 2; 984 fake_preload[i++] = MODINFO_ADDR; 985 fake_preload[i++] = sizeof(vm_offset_t); 986 fake_preload[i++] = KERNVIRTADDR; 987 fake_preload[i++] = MODINFO_SIZE; 988 fake_preload[i++] = sizeof(uint32_t); 989 fake_preload[i++] = (uint32_t)&end - KERNVIRTADDR; 990#ifdef DDB 991 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 992 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 993 fake_preload[i++] = sizeof(vm_offset_t); 994 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 995 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 996 fake_preload[i++] = sizeof(vm_offset_t); 997 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 998 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 999 zend = lastaddr; 1000 zstart = *(uint32_t *)(KERNVIRTADDR + 4); 1001 db_fetch_ksymtab(zstart, zend); 1002 } else 1003#endif 1004 lastaddr = (vm_offset_t)&end; 1005 if (dtb_ptr != NULL) { 1006 /* Copy DTB to KVA space and insert it into module chain. */ 1007 lastaddr = roundup(lastaddr, sizeof(int)); 1008 fake_preload[i++] = MODINFO_METADATA | MODINFOMD_DTBP; 1009 fake_preload[i++] = sizeof(uint32_t); 1010 fake_preload[i++] = (uint32_t)lastaddr; 1011 memmove((void *)lastaddr, dtb_ptr, dtb_size); 1012 lastaddr += dtb_size; 1013 lastaddr = roundup(lastaddr, sizeof(int)); 1014 } 1015 fake_preload[i++] = 0; 1016 fake_preload[i] = 0; 1017 preload_metadata = (void *)fake_preload; 1018 1019 init_static_kenv(NULL, 0); 1020 1021 return (lastaddr); 1022} 1023 1024void 1025pcpu0_init(void) 1026{ 1027#if __ARM_ARCH >= 6 1028 set_curthread(&thread0); 1029#endif 1030 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 1031 PCPU_SET(curthread, &thread0); 1032} 1033 1034#if defined(LINUX_BOOT_ABI) 1035 1036/* Convert the U-Boot command line into FreeBSD kenv and boot options. */ 1037static void 1038cmdline_set_env(char *cmdline, const char *guard) 1039{ 1040 char *cmdline_next, *env; 1041 size_t size, guard_len; 1042 int i; 1043 1044 size = strlen(cmdline); 1045 /* Skip leading spaces. */ 1046 for (; isspace(*cmdline) && (size > 0); cmdline++) 1047 size--; 1048 1049 /* Test and remove guard. */ 1050 if (guard != NULL && guard[0] != '\0') { 1051 guard_len = strlen(guard); 1052 if (strncasecmp(cmdline, guard, guard_len) != 0) 1053 return; 1054 cmdline += guard_len; 1055 size -= guard_len; 1056 } 1057 1058 /* Skip leading spaces. */ 1059 for (; isspace(*cmdline) && (size > 0); cmdline++) 1060 size--; 1061 1062 /* Replace ',' with '\0'. */ 1063 /* TODO: implement escaping for ',' character. */ 1064 cmdline_next = cmdline; 1065 while(strsep(&cmdline_next, ",") != NULL) 1066 ; 1067 init_static_kenv(cmdline, 0); 1068 /* Parse boothowto. */ 1069 for (i = 0; howto_names[i].ev != NULL; i++) { 1070 env = kern_getenv(howto_names[i].ev); 1071 if (env != NULL) { 1072 if (strtoul(env, NULL, 10) != 0) 1073 boothowto |= howto_names[i].mask; 1074 freeenv(env); 1075 } 1076 } 1077} 1078 1079vm_offset_t 1080linux_parse_boot_param(struct arm_boot_params *abp) 1081{ 1082 struct arm_lbabi_tag *walker; 1083 uint32_t revision; 1084 uint64_t serial; 1085 int size; 1086 vm_offset_t lastaddr; 1087#ifdef FDT 1088 struct fdt_header *dtb_ptr; 1089 uint32_t dtb_size; 1090#endif 1091 1092 /* 1093 * Linux boot ABI: r0 = 0, r1 is the board type (!= 0) and r2 1094 * is atags or dtb pointer. If all of these aren't satisfied, 1095 * then punt. Unfortunately, it looks like DT enabled kernels 1096 * doesn't uses board type and U-Boot delivers 0 in r1 for them. 1097 */ 1098 if (abp->abp_r0 != 0 || abp->abp_r2 == 0) 1099 return (0); 1100#ifdef FDT 1101 /* Test if r2 point to valid DTB. */ 1102 dtb_ptr = (struct fdt_header *)abp->abp_r2; 1103 if (fdt_check_header(dtb_ptr) == 0) { 1104 dtb_size = fdt_totalsize(dtb_ptr); 1105 return (fake_preload_metadata(abp, dtb_ptr, dtb_size)); 1106 } 1107#endif 1108 1109 board_id = abp->abp_r1; 1110 walker = (struct arm_lbabi_tag *)abp->abp_r2; 1111 1112 if (ATAG_TAG(walker) != ATAG_CORE) 1113 return 0; 1114 1115 atag_list = walker; 1116 while (ATAG_TAG(walker) != ATAG_NONE) { 1117 switch (ATAG_TAG(walker)) { 1118 case ATAG_CORE: 1119 break; 1120 case ATAG_MEM: 1121 arm_physmem_hardware_region(walker->u.tag_mem.start, 1122 walker->u.tag_mem.size); 1123 break; 1124 case ATAG_INITRD2: 1125 break; 1126 case ATAG_SERIAL: 1127 serial = walker->u.tag_sn.high; 1128 serial <<= 32; 1129 serial |= walker->u.tag_sn.low; 1130 board_set_serial(serial); 1131 break; 1132 case ATAG_REVISION: 1133 revision = walker->u.tag_rev.rev; 1134 board_set_revision(revision); 1135 break; 1136 case ATAG_CMDLINE: 1137 size = ATAG_SIZE(walker) - 1138 sizeof(struct arm_lbabi_header); 1139 size = min(size, LBABI_MAX_COMMAND_LINE); 1140 strncpy(linux_command_line, walker->u.tag_cmd.command, 1141 size); 1142 linux_command_line[size] = '\0'; 1143 break; 1144 default: 1145 break; 1146 } 1147 walker = ATAG_NEXT(walker); 1148 } 1149 1150 /* Save a copy for later */ 1151 bcopy(atag_list, atags, 1152 (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); 1153 1154 lastaddr = fake_preload_metadata(abp, NULL, 0); 1155 cmdline_set_env(linux_command_line, CMDLINE_GUARD); 1156 return lastaddr; 1157} 1158#endif 1159 1160#if defined(FREEBSD_BOOT_LOADER) 1161vm_offset_t 1162freebsd_parse_boot_param(struct arm_boot_params *abp) 1163{ 1164 vm_offset_t lastaddr = 0; 1165 void *mdp; 1166 void *kmdp; 1167#ifdef DDB 1168 vm_offset_t ksym_start; 1169 vm_offset_t ksym_end; 1170#endif 1171 1172 /* 1173 * Mask metadata pointer: it is supposed to be on page boundary. If 1174 * the first argument (mdp) doesn't point to a valid address the 1175 * bootloader must have passed us something else than the metadata 1176 * ptr, so we give up. Also give up if we cannot find metadta section 1177 * the loader creates that we get all this data out of. 1178 */ 1179 1180 if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL) 1181 return 0; 1182 preload_metadata = mdp; 1183 kmdp = preload_search_by_type("elf kernel"); 1184 if (kmdp == NULL) 1185 return 0; 1186 1187 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 1188 loader_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 1189 init_static_kenv(loader_envp, 0); 1190 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 1191#ifdef DDB 1192 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 1193 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 1194 db_fetch_ksymtab(ksym_start, ksym_end); 1195#endif 1196 return lastaddr; 1197} 1198#endif 1199 1200vm_offset_t 1201default_parse_boot_param(struct arm_boot_params *abp) 1202{ 1203 vm_offset_t lastaddr; 1204 1205#if defined(LINUX_BOOT_ABI) 1206 if ((lastaddr = linux_parse_boot_param(abp)) != 0) 1207 return lastaddr; 1208#endif 1209#if defined(FREEBSD_BOOT_LOADER) 1210 if ((lastaddr = freebsd_parse_boot_param(abp)) != 0) 1211 return lastaddr; 1212#endif 1213 /* Fall back to hardcoded metadata. */ 1214 lastaddr = fake_preload_metadata(abp, NULL, 0); 1215 1216 return lastaddr; 1217} 1218 1219/* 1220 * Stub version of the boot parameter parsing routine. We are 1221 * called early in initarm, before even VM has been initialized. 1222 * This routine needs to preserve any data that the boot loader 1223 * has passed in before the kernel starts to grow past the end 1224 * of the BSS, traditionally the place boot-loaders put this data. 1225 * 1226 * Since this is called so early, things that depend on the vm system 1227 * being setup (including access to some SoC's serial ports), about 1228 * all that can be done in this routine is to copy the arguments. 1229 * 1230 * This is the default boot parameter parsing routine. Individual 1231 * kernels/boards can override this weak function with one of their 1232 * own. We just fake metadata... 1233 */ 1234__weak_reference(default_parse_boot_param, parse_boot_param); 1235 1236/* 1237 * Initialize proc0 1238 */ 1239void 1240init_proc0(vm_offset_t kstack) 1241{ 1242 proc_linkup0(&proc0, &thread0); 1243 thread0.td_kstack = kstack; 1244 thread0.td_pcb = (struct pcb *) 1245 (thread0.td_kstack + kstack_pages * PAGE_SIZE) - 1; 1246 thread0.td_pcb->pcb_flags = 0; 1247 thread0.td_pcb->pcb_vfpcpu = -1; 1248 thread0.td_pcb->pcb_vfpstate.fpscr = VFPSCR_DN; 1249 thread0.td_frame = &proc0_tf; 1250 pcpup->pc_curpcb = thread0.td_pcb; 1251} 1252 1253int 1254arm_predict_branch(void *cookie, u_int insn, register_t pc, register_t *new_pc, 1255 u_int (*fetch_reg)(void*, int), u_int (*read_int)(void*, vm_offset_t, u_int*)) 1256{ 1257 u_int addr, nregs, offset = 0; 1258 int error = 0; 1259 1260 switch ((insn >> 24) & 0xf) { 1261 case 0x2: /* add pc, reg1, #value */ 1262 case 0x0: /* add pc, reg1, reg2, lsl #offset */ 1263 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1264 if (((insn >> 16) & 0xf) == 15) 1265 addr += 8; 1266 if (insn & 0x0200000) { 1267 offset = (insn >> 7) & 0x1e; 1268 offset = (insn & 0xff) << (32 - offset) | 1269 (insn & 0xff) >> offset; 1270 } else { 1271 1272 offset = fetch_reg(cookie, insn & 0x0f); 1273 if ((insn & 0x0000ff0) != 0x00000000) { 1274 if (insn & 0x10) 1275 nregs = fetch_reg(cookie, 1276 (insn >> 8) & 0xf); 1277 else 1278 nregs = (insn >> 7) & 0x1f; 1279 switch ((insn >> 5) & 3) { 1280 case 0: 1281 /* lsl */ 1282 offset = offset << nregs; 1283 break; 1284 case 1: 1285 /* lsr */ 1286 offset = offset >> nregs; 1287 break; 1288 default: 1289 break; /* XXX */ 1290 } 1291 1292 } 1293 *new_pc = addr + offset; 1294 return (0); 1295 1296 } 1297 1298 case 0xa: /* b ... */ 1299 case 0xb: /* bl ... */ 1300 addr = ((insn << 2) & 0x03ffffff); 1301 if (addr & 0x02000000) 1302 addr |= 0xfc000000; 1303 *new_pc = (pc + 8 + addr); 1304 return (0); 1305 case 0x7: /* ldr pc, [pc, reg, lsl #2] */ 1306 addr = fetch_reg(cookie, insn & 0xf); 1307 addr = pc + 8 + (addr << 2); 1308 error = read_int(cookie, addr, &addr); 1309 *new_pc = addr; 1310 return (error); 1311 case 0x1: /* mov pc, reg */ 1312 *new_pc = fetch_reg(cookie, insn & 0xf); 1313 return (0); 1314 case 0x4: 1315 case 0x5: /* ldr pc, [reg] */ 1316 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1317 /* ldr pc, [reg, #offset] */ 1318 if (insn & (1 << 24)) 1319 offset = insn & 0xfff; 1320 if (insn & 0x00800000) 1321 addr += offset; 1322 else 1323 addr -= offset; 1324 error = read_int(cookie, addr, &addr); 1325 *new_pc = addr; 1326 1327 return (error); 1328 case 0x8: /* ldmxx reg, {..., pc} */ 1329 case 0x9: 1330 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1331 nregs = (insn & 0x5555) + ((insn >> 1) & 0x5555); 1332 nregs = (nregs & 0x3333) + ((nregs >> 2) & 0x3333); 1333 nregs = (nregs + (nregs >> 4)) & 0x0f0f; 1334 nregs = (nregs + (nregs >> 8)) & 0x001f; 1335 switch ((insn >> 23) & 0x3) { 1336 case 0x0: /* ldmda */ 1337 addr = addr - 0; 1338 break; 1339 case 0x1: /* ldmia */ 1340 addr = addr + 0 + ((nregs - 1) << 2); 1341 break; 1342 case 0x2: /* ldmdb */ 1343 addr = addr - 4; 1344 break; 1345 case 0x3: /* ldmib */ 1346 addr = addr + 4 + ((nregs - 1) << 2); 1347 break; 1348 } 1349 error = read_int(cookie, addr, &addr); 1350 *new_pc = addr; 1351 1352 return (error); 1353 default: 1354 return (EINVAL); 1355 } 1356} 1357 1358#if __ARM_ARCH >= 6 1359void 1360set_stackptrs(int cpu) 1361{ 1362 1363 set_stackptr(PSR_IRQ32_MODE, 1364 irqstack + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1365 set_stackptr(PSR_ABT32_MODE, 1366 abtstack + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1367 set_stackptr(PSR_UND32_MODE, 1368 undstack + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1369} 1370#else 1371void 1372set_stackptrs(int cpu) 1373{ 1374 1375 set_stackptr(PSR_IRQ32_MODE, 1376 irqstack.pv_va + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1377 set_stackptr(PSR_ABT32_MODE, 1378 abtstack.pv_va + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1379 set_stackptr(PSR_UND32_MODE, 1380 undstack.pv_va + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1381} 1382#endif 1383 1384#ifdef EFI 1385#define efi_next_descriptor(ptr, size) \ 1386 ((struct efi_md *)(((uint8_t *) ptr) + size)) 1387 1388static void 1389add_efi_map_entries(struct efi_map_header *efihdr, struct mem_region *mr, 1390 int *mrcnt) 1391{ 1392 struct efi_md *map, *p; 1393 const char *type; 1394 size_t efisz, memory_size; 1395 int ndesc, i, j; 1396 1397 static const char *types[] = { 1398 "Reserved", 1399 "LoaderCode", 1400 "LoaderData", 1401 "BootServicesCode", 1402 "BootServicesData", 1403 "RuntimeServicesCode", 1404 "RuntimeServicesData", 1405 "ConventionalMemory", 1406 "UnusableMemory", 1407 "ACPIReclaimMemory", 1408 "ACPIMemoryNVS", 1409 "MemoryMappedIO", 1410 "MemoryMappedIOPortSpace", 1411 "PalCode" 1412 }; 1413 1414 *mrcnt = 0; 1415 1416 /* 1417 * Memory map data provided by UEFI via the GetMemoryMap 1418 * Boot Services API. 1419 */ 1420 efisz = roundup2(sizeof(struct efi_map_header), 0x10); 1421 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 1422 1423 if (efihdr->descriptor_size == 0) 1424 return; 1425 ndesc = efihdr->memory_size / efihdr->descriptor_size; 1426 1427 if (boothowto & RB_VERBOSE) 1428 printf("%23s %12s %12s %8s %4s\n", 1429 "Type", "Physical", "Virtual", "#Pages", "Attr"); 1430 1431 memory_size = 0; 1432 for (i = 0, j = 0, p = map; i < ndesc; i++, 1433 p = efi_next_descriptor(p, efihdr->descriptor_size)) { 1434 if (boothowto & RB_VERBOSE) { 1435 if (p->md_type <= EFI_MD_TYPE_PALCODE) 1436 type = types[p->md_type]; 1437 else 1438 type = "<INVALID>"; 1439 printf("%23s %012llx %12p %08llx ", type, p->md_phys, 1440 p->md_virt, p->md_pages); 1441 if (p->md_attr & EFI_MD_ATTR_UC) 1442 printf("UC "); 1443 if (p->md_attr & EFI_MD_ATTR_WC) 1444 printf("WC "); 1445 if (p->md_attr & EFI_MD_ATTR_WT) 1446 printf("WT "); 1447 if (p->md_attr & EFI_MD_ATTR_WB) 1448 printf("WB "); 1449 if (p->md_attr & EFI_MD_ATTR_UCE) 1450 printf("UCE "); 1451 if (p->md_attr & EFI_MD_ATTR_WP) 1452 printf("WP "); 1453 if (p->md_attr & EFI_MD_ATTR_RP) 1454 printf("RP "); 1455 if (p->md_attr & EFI_MD_ATTR_XP) 1456 printf("XP "); 1457 if (p->md_attr & EFI_MD_ATTR_RT) 1458 printf("RUNTIME"); 1459 printf("\n"); 1460 } 1461 1462 switch (p->md_type) { 1463 case EFI_MD_TYPE_CODE: 1464 case EFI_MD_TYPE_DATA: 1465 case EFI_MD_TYPE_BS_CODE: 1466 case EFI_MD_TYPE_BS_DATA: 1467 case EFI_MD_TYPE_FREE: 1468 /* 1469 * We're allowed to use any entry with these types. 1470 */ 1471 break; 1472 default: 1473 continue; 1474 } 1475 1476 j++; 1477 if (j >= FDT_MEM_REGIONS) 1478 break; 1479 1480 mr[j].mr_start = p->md_phys; 1481 mr[j].mr_size = p->md_pages * PAGE_SIZE; 1482 memory_size += mr[j].mr_size; 1483 } 1484 1485 *mrcnt = j; 1486} 1487#endif /* EFI */ 1488 1489#ifdef FDT 1490static char * 1491kenv_next(char *cp) 1492{ 1493 1494 if (cp != NULL) { 1495 while (*cp != 0) 1496 cp++; 1497 cp++; 1498 if (*cp == 0) 1499 cp = NULL; 1500 } 1501 return (cp); 1502} 1503 1504static void 1505print_kenv(void) 1506{ 1507 char *cp; 1508 1509 debugf("loader passed (static) kenv:\n"); 1510 if (loader_envp == NULL) { 1511 debugf(" no env, null ptr\n"); 1512 return; 1513 } 1514 debugf(" loader_envp = 0x%08x\n", (uint32_t)loader_envp); 1515 1516 for (cp = loader_envp; cp != NULL; cp = kenv_next(cp)) 1517 debugf(" %x %s\n", (uint32_t)cp, cp); 1518} 1519 1520#if __ARM_ARCH < 6 1521void * 1522initarm(struct arm_boot_params *abp) 1523{ 1524 struct mem_region mem_regions[FDT_MEM_REGIONS]; 1525 struct pv_addr kernel_l1pt; 1526 struct pv_addr dpcpu; 1527 vm_offset_t dtbp, freemempos, l2_start, lastaddr; 1528 uint64_t memsize; 1529 uint32_t l2size; 1530 char *env; 1531 void *kmdp; 1532 u_int l1pagetable; 1533 int i, j, err_devmap, mem_regions_sz; 1534 1535 lastaddr = parse_boot_param(abp); 1536 arm_physmem_kernaddr = abp->abp_physaddr; 1537 1538 memsize = 0; 1539 1540 cpuinfo_init(); 1541 set_cpufuncs(); 1542 1543 /* 1544 * Find the dtb passed in by the boot loader. 1545 */ 1546 kmdp = preload_search_by_type("elf kernel"); 1547 if (kmdp != NULL) 1548 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1549 else 1550 dtbp = (vm_offset_t)NULL; 1551 1552#if defined(FDT_DTB_STATIC) 1553 /* 1554 * In case the device tree blob was not retrieved (from metadata) try 1555 * to use the statically embedded one. 1556 */ 1557 if (dtbp == (vm_offset_t)NULL) 1558 dtbp = (vm_offset_t)&fdt_static_dtb; 1559#endif 1560 1561 if (OF_install(OFW_FDT, 0) == FALSE) 1562 panic("Cannot install FDT"); 1563 1564 if (OF_init((void *)dtbp) != 0) 1565 panic("OF_init failed with the found device tree"); 1566 1567 /* Grab physical memory regions information from device tree. */ 1568 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz, &memsize) != 0) 1569 panic("Cannot get physical memory regions"); 1570 arm_physmem_hardware_regions(mem_regions, mem_regions_sz); 1571 1572 /* Grab reserved memory regions information from device tree. */ 1573 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0) 1574 arm_physmem_exclude_regions(mem_regions, mem_regions_sz, 1575 EXFLAG_NODUMP | EXFLAG_NOALLOC); 1576 1577 /* Platform-specific initialisation */ 1578 platform_probe_and_attach(); 1579 1580 pcpu0_init(); 1581 1582 /* Do basic tuning, hz etc */ 1583 init_param1(); 1584 1585 /* Calculate number of L2 tables needed for mapping vm_page_array */ 1586 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 1587 l2size = (l2size >> L1_S_SHIFT) + 1; 1588 1589 /* 1590 * Add one table for end of kernel map, one for stacks, msgbuf and 1591 * L1 and L2 tables map and one for vectors map. 1592 */ 1593 l2size += 3; 1594 1595 /* Make it divisible by 4 */ 1596 l2size = (l2size + 3) & ~3; 1597 1598 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 1599 1600 /* Define a macro to simplify memory allocation */ 1601#define valloc_pages(var, np) \ 1602 alloc_pages((var).pv_va, (np)); \ 1603 (var).pv_pa = (var).pv_va + (abp->abp_physaddr - KERNVIRTADDR); 1604 1605#define alloc_pages(var, np) \ 1606 (var) = freemempos; \ 1607 freemempos += (np * PAGE_SIZE); \ 1608 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 1609 1610 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 1611 freemempos += PAGE_SIZE; 1612 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 1613 1614 for (i = 0, j = 0; i < l2size; ++i) { 1615 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 1616 valloc_pages(kernel_pt_table[i], 1617 L2_TABLE_SIZE / PAGE_SIZE); 1618 j = i; 1619 } else { 1620 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 1621 L2_TABLE_SIZE_REAL * (i - j); 1622 kernel_pt_table[i].pv_pa = 1623 kernel_pt_table[i].pv_va - KERNVIRTADDR + 1624 abp->abp_physaddr; 1625 1626 } 1627 } 1628 /* 1629 * Allocate a page for the system page mapped to 0x00000000 1630 * or 0xffff0000. This page will just contain the system vectors 1631 * and can be shared by all processes. 1632 */ 1633 valloc_pages(systempage, 1); 1634 1635 /* Allocate dynamic per-cpu area. */ 1636 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 1637 dpcpu_init((void *)dpcpu.pv_va, 0); 1638 1639 /* Allocate stacks for all modes */ 1640 valloc_pages(irqstack, IRQ_STACK_SIZE * MAXCPU); 1641 valloc_pages(abtstack, ABT_STACK_SIZE * MAXCPU); 1642 valloc_pages(undstack, UND_STACK_SIZE * MAXCPU); 1643 valloc_pages(kernelstack, kstack_pages * MAXCPU); 1644 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 1645 1646 /* 1647 * Now we start construction of the L1 page table 1648 * We start by mapping the L2 page tables into the L1. 1649 * This means that we can replace L1 mappings later on if necessary 1650 */ 1651 l1pagetable = kernel_l1pt.pv_va; 1652 1653 /* 1654 * Try to map as much as possible of kernel text and data using 1655 * 1MB section mapping and for the rest of initial kernel address 1656 * space use L2 coarse tables. 1657 * 1658 * Link L2 tables for mapping remainder of kernel (modulo 1MB) 1659 * and kernel structures 1660 */ 1661 l2_start = lastaddr & ~(L1_S_OFFSET); 1662 for (i = 0 ; i < l2size - 1; i++) 1663 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 1664 &kernel_pt_table[i]); 1665 1666 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 1667 1668 /* Map kernel code and data */ 1669 pmap_map_chunk(l1pagetable, KERNVIRTADDR, abp->abp_physaddr, 1670 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 1671 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1672 1673 /* Map L1 directory and allocated L2 page tables */ 1674 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 1675 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1676 1677 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 1678 kernel_pt_table[0].pv_pa, 1679 L2_TABLE_SIZE_REAL * l2size, 1680 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1681 1682 /* Map allocated DPCPU, stacks and msgbuf */ 1683 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 1684 freemempos - dpcpu.pv_va, 1685 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1686 1687 /* Link and map the vector page */ 1688 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 1689 &kernel_pt_table[l2size - 1]); 1690 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 1691 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE); 1692 1693 /* Establish static device mappings. */ 1694 err_devmap = platform_devmap_init(); 1695 devmap_bootstrap(l1pagetable, NULL); 1696 vm_max_kernel_address = platform_lastaddr(); 1697 1698 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT); 1699 pmap_pa = kernel_l1pt.pv_pa; 1700 cpu_setttb(kernel_l1pt.pv_pa); 1701 cpu_tlb_flushID(); 1702 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 1703 1704 /* 1705 * Now that proper page tables are installed, call cpu_setup() to enable 1706 * instruction and data caches and other chip-specific features. 1707 */ 1708 cpu_setup(); 1709 1710 /* 1711 * Only after the SOC registers block is mapped we can perform device 1712 * tree fixups, as they may attempt to read parameters from hardware. 1713 */ 1714 OF_interpret("perform-fixup", 0); 1715 1716 platform_gpio_init(); 1717 1718 cninit(); 1719 1720 debugf("initarm: console initialized\n"); 1721 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1722 debugf(" boothowto = 0x%08x\n", boothowto); 1723 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1724 print_kenv(); 1725 1726 env = kern_getenv("kernelname"); 1727 if (env != NULL) { 1728 strlcpy(kernelname, env, sizeof(kernelname)); 1729 freeenv(env); 1730 } 1731 1732 if (err_devmap != 0) 1733 printf("WARNING: could not fully configure devmap, error=%d\n", 1734 err_devmap); 1735 1736 platform_late_init(); 1737 1738 /* 1739 * Pages were allocated during the secondary bootstrap for the 1740 * stacks for different CPU modes. 1741 * We must now set the r13 registers in the different CPU modes to 1742 * point to these stacks. 1743 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1744 * of the stack memory. 1745 */ 1746 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 1747 1748 set_stackptrs(0); 1749 1750 /* 1751 * We must now clean the cache again.... 1752 * Cleaning may be done by reading new data to displace any 1753 * dirty data in the cache. This will have happened in cpu_setttb() 1754 * but since we are boot strapping the addresses used for the read 1755 * may have just been remapped and thus the cache could be out 1756 * of sync. A re-clean after the switch will cure this. 1757 * After booting there are no gross relocations of the kernel thus 1758 * this problem will not occur after initarm(). 1759 */ 1760 cpu_idcache_wbinv_all(); 1761 1762 undefined_init(); 1763 1764 init_proc0(kernelstack.pv_va); 1765 1766 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1767 pmap_bootstrap(freemempos, &kernel_l1pt); 1768 msgbufp = (void *)msgbufpv.pv_va; 1769 msgbufinit(msgbufp, msgbufsize); 1770 mutex_init(); 1771 1772 /* 1773 * Exclude the kernel (and all the things we allocated which immediately 1774 * follow the kernel) from the VM allocation pool but not from crash 1775 * dumps. virtual_avail is a global variable which tracks the kva we've 1776 * "allocated" while setting up pmaps. 1777 * 1778 * Prepare the list of physical memory available to the vm subsystem. 1779 */ 1780 arm_physmem_exclude_region(abp->abp_physaddr, 1781 (virtual_avail - KERNVIRTADDR), EXFLAG_NOALLOC); 1782 arm_physmem_init_kernel_globals(); 1783 1784 init_param2(physmem); 1785 dbg_monitor_init(); 1786 kdb_init(); 1787 1788 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 1789 sizeof(struct pcb))); 1790} 1791#else /* __ARM_ARCH < 6 */ 1792void * 1793initarm(struct arm_boot_params *abp) 1794{ 1795 struct mem_region mem_regions[FDT_MEM_REGIONS]; 1796 vm_paddr_t lastaddr; 1797 vm_offset_t dtbp, kernelstack, dpcpu; 1798 char *env; 1799 void *kmdp; 1800 int err_devmap, mem_regions_sz; 1801#ifdef EFI 1802 struct efi_map_header *efihdr; 1803#endif 1804 1805 /* get last allocated physical address */ 1806 arm_physmem_kernaddr = abp->abp_physaddr; 1807 lastaddr = parse_boot_param(abp) - KERNVIRTADDR + arm_physmem_kernaddr; 1808 1809 set_cpufuncs(); 1810 cpuinfo_init(); 1811 1812 /* 1813 * Find the dtb passed in by the boot loader. 1814 */ 1815 kmdp = preload_search_by_type("elf kernel"); 1816 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1817#if defined(FDT_DTB_STATIC) 1818 /* 1819 * In case the device tree blob was not retrieved (from metadata) try 1820 * to use the statically embedded one. 1821 */ 1822 if (dtbp == (vm_offset_t)NULL) 1823 dtbp = (vm_offset_t)&fdt_static_dtb; 1824#endif 1825 1826 if (OF_install(OFW_FDT, 0) == FALSE) 1827 panic("Cannot install FDT"); 1828 1829 if (OF_init((void *)dtbp) != 0) 1830 panic("OF_init failed with the found device tree"); 1831 1832#if defined(LINUX_BOOT_ABI) 1833 if (loader_envp == NULL && fdt_get_chosen_bootargs(linux_command_line, 1834 LBABI_MAX_COMMAND_LINE) == 0) 1835 cmdline_set_env(linux_command_line, CMDLINE_GUARD); 1836#endif 1837 1838#ifdef EFI 1839 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 1840 MODINFO_METADATA | MODINFOMD_EFI_MAP); 1841 if (efihdr != NULL) { 1842 add_efi_map_entries(efihdr, mem_regions, &mem_regions_sz); 1843 } else 1844#endif 1845 { 1846 /* Grab physical memory regions information from device tree. */ 1847 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,NULL) != 0) 1848 panic("Cannot get physical memory regions"); 1849 } 1850 arm_physmem_hardware_regions(mem_regions, mem_regions_sz); 1851 1852 /* Grab reserved memory regions information from device tree. */ 1853 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0) 1854 arm_physmem_exclude_regions(mem_regions, mem_regions_sz, 1855 EXFLAG_NODUMP | EXFLAG_NOALLOC); 1856 1857 /* 1858 * Set TEX remapping registers. 1859 * Setup kernel page tables and switch to kernel L1 page table. 1860 */ 1861 pmap_set_tex(); 1862 pmap_bootstrap_prepare(lastaddr); 1863 1864 /* 1865 * Now that proper page tables are installed, call cpu_setup() to enable 1866 * instruction and data caches and other chip-specific features. 1867 */ 1868 cpu_setup(); 1869 1870 /* Platform-specific initialisation */ 1871 platform_probe_and_attach(); 1872 pcpu0_init(); 1873 1874 /* Do basic tuning, hz etc */ 1875 init_param1(); 1876 1877 /* 1878 * Allocate a page for the system page mapped to 0xffff0000 1879 * This page will just contain the system vectors and can be 1880 * shared by all processes. 1881 */ 1882 systempage = pmap_preboot_get_pages(1); 1883 1884 /* Map the vector page. */ 1885 pmap_preboot_map_pages(systempage, ARM_VECTORS_HIGH, 1); 1886 if (virtual_end >= ARM_VECTORS_HIGH) 1887 virtual_end = ARM_VECTORS_HIGH - 1; 1888 1889 /* Allocate dynamic per-cpu area. */ 1890 dpcpu = pmap_preboot_get_vpages(DPCPU_SIZE / PAGE_SIZE); 1891 dpcpu_init((void *)dpcpu, 0); 1892 1893 /* Allocate stacks for all modes */ 1894 irqstack = pmap_preboot_get_vpages(IRQ_STACK_SIZE * MAXCPU); 1895 abtstack = pmap_preboot_get_vpages(ABT_STACK_SIZE * MAXCPU); 1896 undstack = pmap_preboot_get_vpages(UND_STACK_SIZE * MAXCPU ); 1897 kernelstack = pmap_preboot_get_vpages(kstack_pages * MAXCPU); 1898 1899 /* Allocate message buffer. */ 1900 msgbufp = (void *)pmap_preboot_get_vpages( 1901 round_page(msgbufsize) / PAGE_SIZE); 1902 1903 /* 1904 * Pages were allocated during the secondary bootstrap for the 1905 * stacks for different CPU modes. 1906 * We must now set the r13 registers in the different CPU modes to 1907 * point to these stacks. 1908 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1909 * of the stack memory. 1910 */ 1911 set_stackptrs(0); 1912 mutex_init(); 1913 1914 /* Establish static device mappings. */ 1915 err_devmap = platform_devmap_init(); 1916 devmap_bootstrap(0, NULL); 1917 vm_max_kernel_address = platform_lastaddr(); 1918 1919 /* 1920 * Only after the SOC registers block is mapped we can perform device 1921 * tree fixups, as they may attempt to read parameters from hardware. 1922 */ 1923 OF_interpret("perform-fixup", 0); 1924 platform_gpio_init(); 1925 cninit(); 1926 1927 debugf("initarm: console initialized\n"); 1928 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1929 debugf(" boothowto = 0x%08x\n", boothowto); 1930 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1931 debugf(" lastaddr1: 0x%08x\n", lastaddr); 1932 print_kenv(); 1933 1934 env = kern_getenv("kernelname"); 1935 if (env != NULL) 1936 strlcpy(kernelname, env, sizeof(kernelname)); 1937 1938 if (err_devmap != 0) 1939 printf("WARNING: could not fully configure devmap, error=%d\n", 1940 err_devmap); 1941 1942 platform_late_init(); 1943 1944 /* 1945 * We must now clean the cache again.... 1946 * Cleaning may be done by reading new data to displace any 1947 * dirty data in the cache. This will have happened in cpu_setttb() 1948 * but since we are boot strapping the addresses used for the read 1949 * may have just been remapped and thus the cache could be out 1950 * of sync. A re-clean after the switch will cure this. 1951 * After booting there are no gross relocations of the kernel thus 1952 * this problem will not occur after initarm(). 1953 */ 1954 /* Set stack for exception handlers */ 1955 undefined_init(); 1956 init_proc0(kernelstack); 1957 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1958 enable_interrupts(PSR_A); 1959 pmap_bootstrap(0); 1960 1961 /* Exclude the kernel (and all the things we allocated which immediately 1962 * follow the kernel) from the VM allocation pool but not from crash 1963 * dumps. virtual_avail is a global variable which tracks the kva we've 1964 * "allocated" while setting up pmaps. 1965 * 1966 * Prepare the list of physical memory available to the vm subsystem. 1967 */ 1968 arm_physmem_exclude_region(abp->abp_physaddr, 1969 pmap_preboot_get_pages(0) - abp->abp_physaddr, EXFLAG_NOALLOC); 1970 arm_physmem_init_kernel_globals(); 1971 1972 init_param2(physmem); 1973 /* Init message buffer. */ 1974 msgbufinit(msgbufp, msgbufsize); 1975 dbg_monitor_init(); 1976 kdb_init(); 1977 return ((void *)STACKALIGN(thread0.td_pcb)); 1978 1979} 1980 1981#endif /* __ARM_ARCH < 6 */ 1982#endif /* FDT */ 1983 1984uint32_t (*arm_cpu_fill_vdso_timehands)(struct vdso_timehands *, 1985 struct timecounter *); 1986 1987uint32_t 1988cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th, struct timecounter *tc) 1989{ 1990 1991 return (arm_cpu_fill_vdso_timehands != NULL ? 1992 arm_cpu_fill_vdso_timehands(vdso_th, tc) : 0); 1993} 1994