machdep.c revision 306316
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 dependent 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: stable/11/sys/arm/arm/machdep.c 306316 2016-09-25 17:57:52Z kib $"); 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/armreg.h> 98#include <machine/atags.h> 99#include <machine/cpu.h> 100#include <machine/cpuinfo.h> 101#include <machine/debug_monitor.h> 102#include <machine/db_machdep.h> 103#include <machine/frame.h> 104#include <machine/intr.h> 105#include <machine/machdep.h> 106#include <machine/md_var.h> 107#include <machine/metadata.h> 108#include <machine/pcb.h> 109#include <machine/physmem.h> 110#include <machine/platform.h> 111#include <machine/reg.h> 112#include <machine/trap.h> 113#include <machine/undefined.h> 114#include <machine/vfp.h> 115#include <machine/vmparam.h> 116#include <machine/sysarch.h> 117 118#ifdef FDT 119#include <contrib/libfdt/libfdt.h> 120#include <dev/fdt/fdt_common.h> 121#include <dev/ofw/openfirm.h> 122#endif 123 124#ifdef DDB 125#include <ddb/ddb.h> 126 127#if __ARM_ARCH >= 6 128 129DB_SHOW_COMMAND(cp15, db_show_cp15) 130{ 131 u_int reg; 132 133 reg = cp15_midr_get(); 134 db_printf("Cpu ID: 0x%08x\n", reg); 135 reg = cp15_ctr_get(); 136 db_printf("Current Cache Lvl ID: 0x%08x\n",reg); 137 138 reg = cp15_sctlr_get(); 139 db_printf("Ctrl: 0x%08x\n",reg); 140 reg = cp15_actlr_get(); 141 db_printf("Aux Ctrl: 0x%08x\n",reg); 142 143 reg = cp15_id_pfr0_get(); 144 db_printf("Processor Feat 0: 0x%08x\n", reg); 145 reg = cp15_id_pfr1_get(); 146 db_printf("Processor Feat 1: 0x%08x\n", reg); 147 reg = cp15_id_dfr0_get(); 148 db_printf("Debug Feat 0: 0x%08x\n", reg); 149 reg = cp15_id_afr0_get(); 150 db_printf("Auxiliary Feat 0: 0x%08x\n", reg); 151 reg = cp15_id_mmfr0_get(); 152 db_printf("Memory Model Feat 0: 0x%08x\n", reg); 153 reg = cp15_id_mmfr1_get(); 154 db_printf("Memory Model Feat 1: 0x%08x\n", reg); 155 reg = cp15_id_mmfr2_get(); 156 db_printf("Memory Model Feat 2: 0x%08x\n", reg); 157 reg = cp15_id_mmfr3_get(); 158 db_printf("Memory Model Feat 3: 0x%08x\n", reg); 159 reg = cp15_ttbr_get(); 160 db_printf("TTB0: 0x%08x\n", reg); 161} 162 163DB_SHOW_COMMAND(vtop, db_show_vtop) 164{ 165 u_int reg; 166 167 if (have_addr) { 168 cp15_ats1cpr_set(addr); 169 reg = cp15_par_get(); 170 db_printf("Physical address reg: 0x%08x\n",reg); 171 } else 172 db_printf("show vtop <virt_addr>\n"); 173} 174#endif /* __ARM_ARCH >= 6 */ 175#endif /* DDB */ 176 177#ifdef DEBUG 178#define debugf(fmt, args...) printf(fmt, ##args) 179#else 180#define debugf(fmt, args...) 181#endif 182 183#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 184 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \ 185 defined(COMPAT_FREEBSD9) 186#error FreeBSD/arm doesn't provide compatibility with releases prior to 10 187#endif 188 189struct pcpu __pcpu[MAXCPU]; 190struct pcpu *pcpup = &__pcpu[0]; 191 192static struct trapframe proc0_tf; 193uint32_t cpu_reset_address = 0; 194int cold = 1; 195vm_offset_t vector_page; 196 197int (*_arm_memcpy)(void *, void *, int, int) = NULL; 198int (*_arm_bzero)(void *, int, int) = NULL; 199int _min_memcpy_size = 0; 200int _min_bzero_size = 0; 201 202extern int *end; 203 204#ifdef FDT 205static char *loader_envp; 206 207vm_paddr_t pmap_pa; 208 209#if __ARM_ARCH >= 6 210vm_offset_t systempage; 211vm_offset_t irqstack; 212vm_offset_t undstack; 213vm_offset_t abtstack; 214#else 215/* 216 * This is the number of L2 page tables required for covering max 217 * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 218 * stacks etc.), uprounded to be divisible by 4. 219 */ 220#define KERNEL_PT_MAX 78 221 222static struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 223 224struct pv_addr systempage; 225static struct pv_addr msgbufpv; 226struct pv_addr irqstack; 227struct pv_addr undstack; 228struct pv_addr abtstack; 229static struct pv_addr kernelstack; 230#endif 231#endif 232 233#if defined(LINUX_BOOT_ABI) 234#define LBABI_MAX_BANKS 10 235 236#define CMDLINE_GUARD "FreeBSD:" 237uint32_t board_id; 238struct arm_lbabi_tag *atag_list; 239char linux_command_line[LBABI_MAX_COMMAND_LINE + 1]; 240char atags[LBABI_MAX_COMMAND_LINE * 2]; 241uint32_t memstart[LBABI_MAX_BANKS]; 242uint32_t memsize[LBABI_MAX_BANKS]; 243uint32_t membanks; 244#endif 245#ifdef MULTIDELAY 246static delay_func *delay_impl; 247static void *delay_arg; 248#endif 249 250static uint32_t board_revision; 251/* hex representation of uint64_t */ 252static char board_serial[32]; 253 254SYSCTL_NODE(_hw, OID_AUTO, board, CTLFLAG_RD, 0, "Board attributes"); 255SYSCTL_UINT(_hw_board, OID_AUTO, revision, CTLFLAG_RD, 256 &board_revision, 0, "Board revision"); 257SYSCTL_STRING(_hw_board, OID_AUTO, serial, CTLFLAG_RD, 258 board_serial, 0, "Board serial"); 259 260int vfp_exists; 261SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD, 262 &vfp_exists, 0, "Floating point support enabled"); 263 264void 265board_set_serial(uint64_t serial) 266{ 267 268 snprintf(board_serial, sizeof(board_serial)-1, 269 "%016jx", serial); 270} 271 272void 273board_set_revision(uint32_t revision) 274{ 275 276 board_revision = revision; 277} 278 279void 280sendsig(catcher, ksi, mask) 281 sig_t catcher; 282 ksiginfo_t *ksi; 283 sigset_t *mask; 284{ 285 struct thread *td; 286 struct proc *p; 287 struct trapframe *tf; 288 struct sigframe *fp, frame; 289 struct sigacts *psp; 290 struct sysentvec *sysent; 291 int onstack; 292 int sig; 293 int code; 294 295 td = curthread; 296 p = td->td_proc; 297 PROC_LOCK_ASSERT(p, MA_OWNED); 298 sig = ksi->ksi_signo; 299 code = ksi->ksi_code; 300 psp = p->p_sigacts; 301 mtx_assert(&psp->ps_mtx, MA_OWNED); 302 tf = td->td_frame; 303 onstack = sigonstack(tf->tf_usr_sp); 304 305 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 306 catcher, sig); 307 308 /* Allocate and validate space for the signal handler context. */ 309 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !(onstack) && 310 SIGISMEMBER(psp->ps_sigonstack, sig)) { 311 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 312 td->td_sigstk.ss_size); 313#if defined(COMPAT_43) 314 td->td_sigstk.ss_flags |= SS_ONSTACK; 315#endif 316 } else 317 fp = (struct sigframe *)td->td_frame->tf_usr_sp; 318 319 /* make room on the stack */ 320 fp--; 321 322 /* make the stack aligned */ 323 fp = (struct sigframe *)STACKALIGN(fp); 324 /* Populate the siginfo frame. */ 325 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); 326 frame.sf_si = ksi->ksi_info; 327 frame.sf_uc.uc_sigmask = *mask; 328 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK ) 329 ? ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE; 330 frame.sf_uc.uc_stack = td->td_sigstk; 331 mtx_unlock(&psp->ps_mtx); 332 PROC_UNLOCK(td->td_proc); 333 334 /* Copy the sigframe out to the user's stack. */ 335 if (copyout(&frame, fp, sizeof(*fp)) != 0) { 336 /* Process has trashed its stack. Kill it. */ 337 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 338 PROC_LOCK(p); 339 sigexit(td, SIGILL); 340 } 341 342 /* 343 * Build context to run handler in. We invoke the handler 344 * directly, only returning via the trampoline. Note the 345 * trampoline version numbers are coordinated with machine- 346 * dependent code in libc. 347 */ 348 349 tf->tf_r0 = sig; 350 tf->tf_r1 = (register_t)&fp->sf_si; 351 tf->tf_r2 = (register_t)&fp->sf_uc; 352 353 /* the trampoline uses r5 as the uc address */ 354 tf->tf_r5 = (register_t)&fp->sf_uc; 355 tf->tf_pc = (register_t)catcher; 356 tf->tf_usr_sp = (register_t)fp; 357 sysent = p->p_sysent; 358 if (sysent->sv_sigcode_base != 0) 359 tf->tf_usr_lr = (register_t)sysent->sv_sigcode_base; 360 else 361 tf->tf_usr_lr = (register_t)(sysent->sv_psstrings - 362 *(sysent->sv_szsigcode)); 363 /* Set the mode to enter in the signal handler */ 364#if __ARM_ARCH >= 7 365 if ((register_t)catcher & 1) 366 tf->tf_spsr |= PSR_T; 367 else 368 tf->tf_spsr &= ~PSR_T; 369#endif 370 371 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr, 372 tf->tf_usr_sp); 373 374 PROC_LOCK(p); 375 mtx_lock(&psp->ps_mtx); 376} 377 378struct kva_md_info kmi; 379 380/* 381 * arm32_vector_init: 382 * 383 * Initialize the vector page, and select whether or not to 384 * relocate the vectors. 385 * 386 * NOTE: We expect the vector page to be mapped at its expected 387 * destination. 388 */ 389 390extern unsigned int page0[], page0_data[]; 391void 392arm_vector_init(vm_offset_t va, int which) 393{ 394 unsigned int *vectors = (int *) va; 395 unsigned int *vectors_data = vectors + (page0_data - page0); 396 int vec; 397 398 /* 399 * Loop through the vectors we're taking over, and copy the 400 * vector's insn and data word. 401 */ 402 for (vec = 0; vec < ARM_NVEC; vec++) { 403 if ((which & (1 << vec)) == 0) { 404 /* Don't want to take over this vector. */ 405 continue; 406 } 407 vectors[vec] = page0[vec]; 408 vectors_data[vec] = page0_data[vec]; 409 } 410 411 /* Now sync the vectors. */ 412 icache_sync(va, (ARM_NVEC * 2) * sizeof(u_int)); 413 414 vector_page = va; 415 416 if (va == ARM_VECTORS_HIGH) { 417 /* 418 * Enable high vectors in the system control reg (SCTLR). 419 * 420 * Assume the MD caller knows what it's doing here, and really 421 * does want the vector page relocated. 422 * 423 * Note: This has to be done here (and not just in 424 * cpu_setup()) because the vector page needs to be 425 * accessible *before* cpu_startup() is called. 426 * Think ddb(9) ... 427 */ 428 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 429 } 430} 431 432static void 433cpu_startup(void *dummy) 434{ 435 struct pcb *pcb = thread0.td_pcb; 436 const unsigned int mbyte = 1024 * 1024; 437#if __ARM_ARCH < 6 && !defined(ARM_CACHE_LOCK_ENABLE) 438 vm_page_t m; 439#endif 440 441 identify_arm_cpu(); 442 443 vm_ksubmap_init(&kmi); 444 445 /* 446 * Display the RAM layout. 447 */ 448 printf("real memory = %ju (%ju MB)\n", 449 (uintmax_t)arm32_ptob(realmem), 450 (uintmax_t)arm32_ptob(realmem) / mbyte); 451 printf("avail memory = %ju (%ju MB)\n", 452 (uintmax_t)arm32_ptob(vm_cnt.v_free_count), 453 (uintmax_t)arm32_ptob(vm_cnt.v_free_count) / mbyte); 454 if (bootverbose) { 455 arm_physmem_print_tables(); 456 devmap_print_table(); 457 } 458 459 bufinit(); 460 vm_pager_bufferinit(); 461 pcb->pcb_regs.sf_sp = (u_int)thread0.td_kstack + 462 USPACE_SVC_STACK_TOP; 463 pmap_set_pcb_pagedir(kernel_pmap, pcb); 464#if __ARM_ARCH < 6 465 vector_page_setprot(VM_PROT_READ); 466 pmap_postinit(); 467#ifdef ARM_CACHE_LOCK_ENABLE 468 pmap_kenter_user(ARM_TP_ADDRESS, ARM_TP_ADDRESS); 469 arm_lock_cache_line(ARM_TP_ADDRESS); 470#else 471 m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_ZERO); 472 pmap_kenter_user(ARM_TP_ADDRESS, VM_PAGE_TO_PHYS(m)); 473#endif 474 *(uint32_t *)ARM_RAS_START = 0; 475 *(uint32_t *)ARM_RAS_END = 0xffffffff; 476#endif 477} 478 479SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 480 481/* 482 * Flush the D-cache for non-DMA I/O so that the I-cache can 483 * be made coherent later. 484 */ 485void 486cpu_flush_dcache(void *ptr, size_t len) 487{ 488 489 dcache_wb_poc((vm_offset_t)ptr, (vm_paddr_t)vtophys(ptr), len); 490} 491 492/* Get current clock frequency for the given cpu id. */ 493int 494cpu_est_clockrate(int cpu_id, uint64_t *rate) 495{ 496 497 return (ENXIO); 498} 499 500void 501cpu_idle(int busy) 502{ 503 504 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", busy, curcpu); 505 spinlock_enter(); 506#ifndef NO_EVENTTIMERS 507 if (!busy) 508 cpu_idleclock(); 509#endif 510 if (!sched_runnable()) 511 cpu_sleep(0); 512#ifndef NO_EVENTTIMERS 513 if (!busy) 514 cpu_activeclock(); 515#endif 516 spinlock_exit(); 517 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done", busy, curcpu); 518} 519 520int 521cpu_idle_wakeup(int cpu) 522{ 523 524 return (0); 525} 526 527/* 528 * Most ARM platforms don't need to do anything special to init their clocks 529 * (they get intialized during normal device attachment), and by not defining a 530 * cpu_initclocks() function they get this generic one. Any platform that needs 531 * to do something special can just provide their own implementation, which will 532 * override this one due to the weak linkage. 533 */ 534void 535arm_generic_initclocks(void) 536{ 537 538#ifndef NO_EVENTTIMERS 539#ifdef SMP 540 if (PCPU_GET(cpuid) == 0) 541 cpu_initclocks_bsp(); 542 else 543 cpu_initclocks_ap(); 544#else 545 cpu_initclocks_bsp(); 546#endif 547#endif 548} 549__weak_reference(arm_generic_initclocks, cpu_initclocks); 550 551#ifdef MULTIDELAY 552void 553arm_set_delay(delay_func *impl, void *arg) 554{ 555 556 KASSERT(impl != NULL, ("No DELAY implementation")); 557 delay_impl = impl; 558 delay_arg = arg; 559} 560 561void 562DELAY(int usec) 563{ 564 565 delay_impl(usec, delay_arg); 566} 567#endif 568 569int 570fill_regs(struct thread *td, struct reg *regs) 571{ 572 struct trapframe *tf = td->td_frame; 573 bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 574 regs->r_sp = tf->tf_usr_sp; 575 regs->r_lr = tf->tf_usr_lr; 576 regs->r_pc = tf->tf_pc; 577 regs->r_cpsr = tf->tf_spsr; 578 return (0); 579} 580int 581fill_fpregs(struct thread *td, struct fpreg *regs) 582{ 583 bzero(regs, sizeof(*regs)); 584 return (0); 585} 586 587int 588set_regs(struct thread *td, struct reg *regs) 589{ 590 struct trapframe *tf = td->td_frame; 591 592 bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 593 tf->tf_usr_sp = regs->r_sp; 594 tf->tf_usr_lr = regs->r_lr; 595 tf->tf_pc = regs->r_pc; 596 tf->tf_spsr &= ~PSR_FLAGS; 597 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 598 return (0); 599} 600 601int 602set_fpregs(struct thread *td, struct fpreg *regs) 603{ 604 return (0); 605} 606 607int 608fill_dbregs(struct thread *td, struct dbreg *regs) 609{ 610 return (0); 611} 612int 613set_dbregs(struct thread *td, struct dbreg *regs) 614{ 615 return (0); 616} 617 618 619static int 620ptrace_read_int(struct thread *td, vm_offset_t addr, uint32_t *v) 621{ 622 623 if (proc_readmem(td, td->td_proc, addr, v, sizeof(*v)) != sizeof(*v)) 624 return (ENOMEM); 625 return (0); 626} 627 628static int 629ptrace_write_int(struct thread *td, vm_offset_t addr, uint32_t v) 630{ 631 632 if (proc_writemem(td, td->td_proc, addr, &v, sizeof(v)) != sizeof(v)) 633 return (ENOMEM); 634 return (0); 635} 636 637static u_int 638ptrace_get_usr_reg(void *cookie, int reg) 639{ 640 int ret; 641 struct thread *td = cookie; 642 643 KASSERT(((reg >= 0) && (reg <= ARM_REG_NUM_PC)), 644 ("reg is outside range")); 645 646 switch(reg) { 647 case ARM_REG_NUM_PC: 648 ret = td->td_frame->tf_pc; 649 break; 650 case ARM_REG_NUM_LR: 651 ret = td->td_frame->tf_usr_lr; 652 break; 653 case ARM_REG_NUM_SP: 654 ret = td->td_frame->tf_usr_sp; 655 break; 656 default: 657 ret = *((register_t*)&td->td_frame->tf_r0 + reg); 658 break; 659 } 660 661 return (ret); 662} 663 664static u_int 665ptrace_get_usr_int(void* cookie, vm_offset_t offset, u_int* val) 666{ 667 struct thread *td = cookie; 668 u_int error; 669 670 error = ptrace_read_int(td, offset, val); 671 672 return (error); 673} 674 675/** 676 * This function parses current instruction opcode and decodes 677 * any possible jump (change in PC) which might occur after 678 * the instruction is executed. 679 * 680 * @param td Thread structure of analysed task 681 * @param cur_instr Currently executed instruction 682 * @param alt_next_address Pointer to the variable where 683 * the destination address of the 684 * jump instruction shall be stored. 685 * 686 * @return <0> when jump is possible 687 * <EINVAL> otherwise 688 */ 689static int 690ptrace_get_alternative_next(struct thread *td, uint32_t cur_instr, 691 uint32_t *alt_next_address) 692{ 693 int error; 694 695 if (inst_branch(cur_instr) || inst_call(cur_instr) || 696 inst_return(cur_instr)) { 697 error = arm_predict_branch(td, cur_instr, td->td_frame->tf_pc, 698 alt_next_address, ptrace_get_usr_reg, ptrace_get_usr_int); 699 700 return (error); 701 } 702 703 return (EINVAL); 704} 705 706int 707ptrace_single_step(struct thread *td) 708{ 709 struct proc *p; 710 int error, error_alt; 711 uint32_t cur_instr, alt_next = 0; 712 713 /* TODO: This needs to be updated for Thumb-2 */ 714 if ((td->td_frame->tf_spsr & PSR_T) != 0) 715 return (EINVAL); 716 717 KASSERT(td->td_md.md_ptrace_instr == 0, 718 ("Didn't clear single step")); 719 KASSERT(td->td_md.md_ptrace_instr_alt == 0, 720 ("Didn't clear alternative single step")); 721 p = td->td_proc; 722 PROC_UNLOCK(p); 723 724 error = ptrace_read_int(td, td->td_frame->tf_pc, 725 &cur_instr); 726 if (error) 727 goto out; 728 729 error = ptrace_read_int(td, td->td_frame->tf_pc + INSN_SIZE, 730 &td->td_md.md_ptrace_instr); 731 if (error == 0) { 732 error = ptrace_write_int(td, td->td_frame->tf_pc + INSN_SIZE, 733 PTRACE_BREAKPOINT); 734 if (error) { 735 td->td_md.md_ptrace_instr = 0; 736 } else { 737 td->td_md.md_ptrace_addr = td->td_frame->tf_pc + 738 INSN_SIZE; 739 } 740 } 741 742 error_alt = ptrace_get_alternative_next(td, cur_instr, &alt_next); 743 if (error_alt == 0) { 744 error_alt = ptrace_read_int(td, alt_next, 745 &td->td_md.md_ptrace_instr_alt); 746 if (error_alt) { 747 td->td_md.md_ptrace_instr_alt = 0; 748 } else { 749 error_alt = ptrace_write_int(td, alt_next, 750 PTRACE_BREAKPOINT); 751 if (error_alt) 752 td->td_md.md_ptrace_instr_alt = 0; 753 else 754 td->td_md.md_ptrace_addr_alt = alt_next; 755 } 756 } 757 758out: 759 PROC_LOCK(p); 760 return ((error != 0) && (error_alt != 0)); 761} 762 763int 764ptrace_clear_single_step(struct thread *td) 765{ 766 struct proc *p; 767 768 /* TODO: This needs to be updated for Thumb-2 */ 769 if ((td->td_frame->tf_spsr & PSR_T) != 0) 770 return (EINVAL); 771 772 if (td->td_md.md_ptrace_instr != 0) { 773 p = td->td_proc; 774 PROC_UNLOCK(p); 775 ptrace_write_int(td, td->td_md.md_ptrace_addr, 776 td->td_md.md_ptrace_instr); 777 PROC_LOCK(p); 778 td->td_md.md_ptrace_instr = 0; 779 } 780 781 if (td->td_md.md_ptrace_instr_alt != 0) { 782 p = td->td_proc; 783 PROC_UNLOCK(p); 784 ptrace_write_int(td, td->td_md.md_ptrace_addr_alt, 785 td->td_md.md_ptrace_instr_alt); 786 PROC_LOCK(p); 787 td->td_md.md_ptrace_instr_alt = 0; 788 } 789 790 return (0); 791} 792 793int 794ptrace_set_pc(struct thread *td, unsigned long addr) 795{ 796 td->td_frame->tf_pc = addr; 797 return (0); 798} 799 800void 801cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 802{ 803} 804 805void 806spinlock_enter(void) 807{ 808 struct thread *td; 809 register_t cspr; 810 811 td = curthread; 812 if (td->td_md.md_spinlock_count == 0) { 813 cspr = disable_interrupts(PSR_I | PSR_F); 814 td->td_md.md_spinlock_count = 1; 815 td->td_md.md_saved_cspr = cspr; 816 } else 817 td->td_md.md_spinlock_count++; 818 critical_enter(); 819} 820 821void 822spinlock_exit(void) 823{ 824 struct thread *td; 825 register_t cspr; 826 827 td = curthread; 828 critical_exit(); 829 cspr = td->td_md.md_saved_cspr; 830 td->td_md.md_spinlock_count--; 831 if (td->td_md.md_spinlock_count == 0) 832 restore_interrupts(cspr); 833} 834 835/* 836 * Clear registers on exec 837 */ 838void 839exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 840{ 841 struct trapframe *tf = td->td_frame; 842 843 memset(tf, 0, sizeof(*tf)); 844 tf->tf_usr_sp = stack; 845 tf->tf_usr_lr = imgp->entry_addr; 846 tf->tf_svc_lr = 0x77777777; 847 tf->tf_pc = imgp->entry_addr; 848 tf->tf_spsr = PSR_USR32_MODE; 849} 850 851/* 852 * Get machine context. 853 */ 854int 855get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 856{ 857 struct trapframe *tf = td->td_frame; 858 __greg_t *gr = mcp->__gregs; 859 860 if (clear_ret & GET_MC_CLEAR_RET) { 861 gr[_REG_R0] = 0; 862 gr[_REG_CPSR] = tf->tf_spsr & ~PSR_C; 863 } else { 864 gr[_REG_R0] = tf->tf_r0; 865 gr[_REG_CPSR] = tf->tf_spsr; 866 } 867 gr[_REG_R1] = tf->tf_r1; 868 gr[_REG_R2] = tf->tf_r2; 869 gr[_REG_R3] = tf->tf_r3; 870 gr[_REG_R4] = tf->tf_r4; 871 gr[_REG_R5] = tf->tf_r5; 872 gr[_REG_R6] = tf->tf_r6; 873 gr[_REG_R7] = tf->tf_r7; 874 gr[_REG_R8] = tf->tf_r8; 875 gr[_REG_R9] = tf->tf_r9; 876 gr[_REG_R10] = tf->tf_r10; 877 gr[_REG_R11] = tf->tf_r11; 878 gr[_REG_R12] = tf->tf_r12; 879 gr[_REG_SP] = tf->tf_usr_sp; 880 gr[_REG_LR] = tf->tf_usr_lr; 881 gr[_REG_PC] = tf->tf_pc; 882 883 return (0); 884} 885 886/* 887 * Set machine context. 888 * 889 * However, we don't set any but the user modifiable flags, and we won't 890 * touch the cs selector. 891 */ 892int 893set_mcontext(struct thread *td, mcontext_t *mcp) 894{ 895 struct trapframe *tf = td->td_frame; 896 const __greg_t *gr = mcp->__gregs; 897 898 tf->tf_r0 = gr[_REG_R0]; 899 tf->tf_r1 = gr[_REG_R1]; 900 tf->tf_r2 = gr[_REG_R2]; 901 tf->tf_r3 = gr[_REG_R3]; 902 tf->tf_r4 = gr[_REG_R4]; 903 tf->tf_r5 = gr[_REG_R5]; 904 tf->tf_r6 = gr[_REG_R6]; 905 tf->tf_r7 = gr[_REG_R7]; 906 tf->tf_r8 = gr[_REG_R8]; 907 tf->tf_r9 = gr[_REG_R9]; 908 tf->tf_r10 = gr[_REG_R10]; 909 tf->tf_r11 = gr[_REG_R11]; 910 tf->tf_r12 = gr[_REG_R12]; 911 tf->tf_usr_sp = gr[_REG_SP]; 912 tf->tf_usr_lr = gr[_REG_LR]; 913 tf->tf_pc = gr[_REG_PC]; 914 tf->tf_spsr = gr[_REG_CPSR]; 915 916 return (0); 917} 918 919/* 920 * MPSAFE 921 */ 922int 923sys_sigreturn(td, uap) 924 struct thread *td; 925 struct sigreturn_args /* { 926 const struct __ucontext *sigcntxp; 927 } */ *uap; 928{ 929 ucontext_t uc; 930 int spsr; 931 932 if (uap == NULL) 933 return (EFAULT); 934 if (copyin(uap->sigcntxp, &uc, sizeof(uc))) 935 return (EFAULT); 936 /* 937 * Make sure the processor mode has not been tampered with and 938 * interrupts have not been disabled. 939 */ 940 spsr = uc.uc_mcontext.__gregs[_REG_CPSR]; 941 if ((spsr & PSR_MODE) != PSR_USR32_MODE || 942 (spsr & (PSR_I | PSR_F)) != 0) 943 return (EINVAL); 944 /* Restore register context. */ 945 set_mcontext(td, &uc.uc_mcontext); 946 947 /* Restore signal mask. */ 948 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 949 950 return (EJUSTRETURN); 951} 952 953 954/* 955 * Construct a PCB from a trapframe. This is called from kdb_trap() where 956 * we want to start a backtrace from the function that caused us to enter 957 * the debugger. We have the context in the trapframe, but base the trace 958 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 959 * enough for a backtrace. 960 */ 961void 962makectx(struct trapframe *tf, struct pcb *pcb) 963{ 964 pcb->pcb_regs.sf_r4 = tf->tf_r4; 965 pcb->pcb_regs.sf_r5 = tf->tf_r5; 966 pcb->pcb_regs.sf_r6 = tf->tf_r6; 967 pcb->pcb_regs.sf_r7 = tf->tf_r7; 968 pcb->pcb_regs.sf_r8 = tf->tf_r8; 969 pcb->pcb_regs.sf_r9 = tf->tf_r9; 970 pcb->pcb_regs.sf_r10 = tf->tf_r10; 971 pcb->pcb_regs.sf_r11 = tf->tf_r11; 972 pcb->pcb_regs.sf_r12 = tf->tf_r12; 973 pcb->pcb_regs.sf_pc = tf->tf_pc; 974 pcb->pcb_regs.sf_lr = tf->tf_usr_lr; 975 pcb->pcb_regs.sf_sp = tf->tf_usr_sp; 976} 977 978/* 979 * Fake up a boot descriptor table 980 */ 981vm_offset_t 982fake_preload_metadata(struct arm_boot_params *abp __unused, void *dtb_ptr, 983 size_t dtb_size) 984{ 985#ifdef DDB 986 vm_offset_t zstart = 0, zend = 0; 987#endif 988 vm_offset_t lastaddr; 989 int i = 0; 990 static uint32_t fake_preload[35]; 991 992 fake_preload[i++] = MODINFO_NAME; 993 fake_preload[i++] = strlen("kernel") + 1; 994 strcpy((char*)&fake_preload[i++], "kernel"); 995 i += 1; 996 fake_preload[i++] = MODINFO_TYPE; 997 fake_preload[i++] = strlen("elf kernel") + 1; 998 strcpy((char*)&fake_preload[i++], "elf kernel"); 999 i += 2; 1000 fake_preload[i++] = MODINFO_ADDR; 1001 fake_preload[i++] = sizeof(vm_offset_t); 1002 fake_preload[i++] = KERNVIRTADDR; 1003 fake_preload[i++] = MODINFO_SIZE; 1004 fake_preload[i++] = sizeof(uint32_t); 1005 fake_preload[i++] = (uint32_t)&end - KERNVIRTADDR; 1006#ifdef DDB 1007 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 1008 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 1009 fake_preload[i++] = sizeof(vm_offset_t); 1010 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 1011 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 1012 fake_preload[i++] = sizeof(vm_offset_t); 1013 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 1014 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 1015 zend = lastaddr; 1016 zstart = *(uint32_t *)(KERNVIRTADDR + 4); 1017 db_fetch_ksymtab(zstart, zend); 1018 } else 1019#endif 1020 lastaddr = (vm_offset_t)&end; 1021 if (dtb_ptr != NULL) { 1022 /* Copy DTB to KVA space and insert it into module chain. */ 1023 lastaddr = roundup(lastaddr, sizeof(int)); 1024 fake_preload[i++] = MODINFO_METADATA | MODINFOMD_DTBP; 1025 fake_preload[i++] = sizeof(uint32_t); 1026 fake_preload[i++] = (uint32_t)lastaddr; 1027 memmove((void *)lastaddr, dtb_ptr, dtb_size); 1028 lastaddr += dtb_size; 1029 lastaddr = roundup(lastaddr, sizeof(int)); 1030 } 1031 fake_preload[i++] = 0; 1032 fake_preload[i] = 0; 1033 preload_metadata = (void *)fake_preload; 1034 1035 init_static_kenv(NULL, 0); 1036 1037 return (lastaddr); 1038} 1039 1040void 1041pcpu0_init(void) 1042{ 1043#if __ARM_ARCH >= 6 1044 set_curthread(&thread0); 1045#endif 1046 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 1047 PCPU_SET(curthread, &thread0); 1048} 1049 1050#if defined(LINUX_BOOT_ABI) 1051 1052/* Convert the U-Boot command line into FreeBSD kenv and boot options. */ 1053static void 1054cmdline_set_env(char *cmdline, const char *guard) 1055{ 1056 char *cmdline_next, *env; 1057 size_t size, guard_len; 1058 int i; 1059 1060 size = strlen(cmdline); 1061 /* Skip leading spaces. */ 1062 for (; isspace(*cmdline) && (size > 0); cmdline++) 1063 size--; 1064 1065 /* Test and remove guard. */ 1066 if (guard != NULL && guard[0] != '\0') { 1067 guard_len = strlen(guard); 1068 if (strncasecmp(cmdline, guard, guard_len) != 0) 1069 return; 1070 cmdline += guard_len; 1071 size -= guard_len; 1072 } 1073 1074 /* Skip leading spaces. */ 1075 for (; isspace(*cmdline) && (size > 0); cmdline++) 1076 size--; 1077 1078 /* Replace ',' with '\0'. */ 1079 /* TODO: implement escaping for ',' character. */ 1080 cmdline_next = cmdline; 1081 while(strsep(&cmdline_next, ",") != NULL) 1082 ; 1083 init_static_kenv(cmdline, 0); 1084 /* Parse boothowto. */ 1085 for (i = 0; howto_names[i].ev != NULL; i++) { 1086 env = kern_getenv(howto_names[i].ev); 1087 if (env != NULL) { 1088 if (strtoul(env, NULL, 10) != 0) 1089 boothowto |= howto_names[i].mask; 1090 freeenv(env); 1091 } 1092 } 1093} 1094 1095vm_offset_t 1096linux_parse_boot_param(struct arm_boot_params *abp) 1097{ 1098 struct arm_lbabi_tag *walker; 1099 uint32_t revision; 1100 uint64_t serial; 1101 int size; 1102 vm_offset_t lastaddr; 1103#ifdef FDT 1104 struct fdt_header *dtb_ptr; 1105 uint32_t dtb_size; 1106#endif 1107 1108 /* 1109 * Linux boot ABI: r0 = 0, r1 is the board type (!= 0) and r2 1110 * is atags or dtb pointer. If all of these aren't satisfied, 1111 * then punt. Unfortunately, it looks like DT enabled kernels 1112 * doesn't uses board type and U-Boot delivers 0 in r1 for them. 1113 */ 1114 if (abp->abp_r0 != 0 || abp->abp_r2 == 0) 1115 return (0); 1116#ifdef FDT 1117 /* Test if r2 point to valid DTB. */ 1118 dtb_ptr = (struct fdt_header *)abp->abp_r2; 1119 if (fdt_check_header(dtb_ptr) == 0) { 1120 dtb_size = fdt_totalsize(dtb_ptr); 1121 return (fake_preload_metadata(abp, dtb_ptr, dtb_size)); 1122 } 1123#endif 1124 1125 board_id = abp->abp_r1; 1126 walker = (struct arm_lbabi_tag *)abp->abp_r2; 1127 1128 if (ATAG_TAG(walker) != ATAG_CORE) 1129 return 0; 1130 1131 atag_list = walker; 1132 while (ATAG_TAG(walker) != ATAG_NONE) { 1133 switch (ATAG_TAG(walker)) { 1134 case ATAG_CORE: 1135 break; 1136 case ATAG_MEM: 1137 arm_physmem_hardware_region(walker->u.tag_mem.start, 1138 walker->u.tag_mem.size); 1139 break; 1140 case ATAG_INITRD2: 1141 break; 1142 case ATAG_SERIAL: 1143 serial = walker->u.tag_sn.high; 1144 serial <<= 32; 1145 serial |= walker->u.tag_sn.low; 1146 board_set_serial(serial); 1147 break; 1148 case ATAG_REVISION: 1149 revision = walker->u.tag_rev.rev; 1150 board_set_revision(revision); 1151 break; 1152 case ATAG_CMDLINE: 1153 size = ATAG_SIZE(walker) - 1154 sizeof(struct arm_lbabi_header); 1155 size = min(size, LBABI_MAX_COMMAND_LINE); 1156 strncpy(linux_command_line, walker->u.tag_cmd.command, 1157 size); 1158 linux_command_line[size] = '\0'; 1159 break; 1160 default: 1161 break; 1162 } 1163 walker = ATAG_NEXT(walker); 1164 } 1165 1166 /* Save a copy for later */ 1167 bcopy(atag_list, atags, 1168 (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); 1169 1170 lastaddr = fake_preload_metadata(abp, NULL, 0); 1171 cmdline_set_env(linux_command_line, CMDLINE_GUARD); 1172 return lastaddr; 1173} 1174#endif 1175 1176#if defined(FREEBSD_BOOT_LOADER) 1177vm_offset_t 1178freebsd_parse_boot_param(struct arm_boot_params *abp) 1179{ 1180 vm_offset_t lastaddr = 0; 1181 void *mdp; 1182 void *kmdp; 1183#ifdef DDB 1184 vm_offset_t ksym_start; 1185 vm_offset_t ksym_end; 1186#endif 1187 1188 /* 1189 * Mask metadata pointer: it is supposed to be on page boundary. If 1190 * the first argument (mdp) doesn't point to a valid address the 1191 * bootloader must have passed us something else than the metadata 1192 * ptr, so we give up. Also give up if we cannot find metadta section 1193 * the loader creates that we get all this data out of. 1194 */ 1195 1196 if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL) 1197 return 0; 1198 preload_metadata = mdp; 1199 kmdp = preload_search_by_type("elf kernel"); 1200 if (kmdp == NULL) 1201 return 0; 1202 1203 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 1204 loader_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 1205 init_static_kenv(loader_envp, 0); 1206 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 1207#ifdef DDB 1208 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 1209 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 1210 db_fetch_ksymtab(ksym_start, ksym_end); 1211#endif 1212 return lastaddr; 1213} 1214#endif 1215 1216vm_offset_t 1217default_parse_boot_param(struct arm_boot_params *abp) 1218{ 1219 vm_offset_t lastaddr; 1220 1221#if defined(LINUX_BOOT_ABI) 1222 if ((lastaddr = linux_parse_boot_param(abp)) != 0) 1223 return lastaddr; 1224#endif 1225#if defined(FREEBSD_BOOT_LOADER) 1226 if ((lastaddr = freebsd_parse_boot_param(abp)) != 0) 1227 return lastaddr; 1228#endif 1229 /* Fall back to hardcoded metadata. */ 1230 lastaddr = fake_preload_metadata(abp, NULL, 0); 1231 1232 return lastaddr; 1233} 1234 1235/* 1236 * Stub version of the boot parameter parsing routine. We are 1237 * called early in initarm, before even VM has been initialized. 1238 * This routine needs to preserve any data that the boot loader 1239 * has passed in before the kernel starts to grow past the end 1240 * of the BSS, traditionally the place boot-loaders put this data. 1241 * 1242 * Since this is called so early, things that depend on the vm system 1243 * being setup (including access to some SoC's serial ports), about 1244 * all that can be done in this routine is to copy the arguments. 1245 * 1246 * This is the default boot parameter parsing routine. Individual 1247 * kernels/boards can override this weak function with one of their 1248 * own. We just fake metadata... 1249 */ 1250__weak_reference(default_parse_boot_param, parse_boot_param); 1251 1252/* 1253 * Initialize proc0 1254 */ 1255void 1256init_proc0(vm_offset_t kstack) 1257{ 1258 proc_linkup0(&proc0, &thread0); 1259 thread0.td_kstack = kstack; 1260 thread0.td_pcb = (struct pcb *) 1261 (thread0.td_kstack + kstack_pages * PAGE_SIZE) - 1; 1262 thread0.td_pcb->pcb_flags = 0; 1263 thread0.td_pcb->pcb_vfpcpu = -1; 1264 thread0.td_pcb->pcb_vfpstate.fpscr = VFPSCR_DN; 1265 thread0.td_frame = &proc0_tf; 1266 pcpup->pc_curpcb = thread0.td_pcb; 1267} 1268 1269int 1270arm_predict_branch(void *cookie, u_int insn, register_t pc, register_t *new_pc, 1271 u_int (*fetch_reg)(void*, int), u_int (*read_int)(void*, vm_offset_t, u_int*)) 1272{ 1273 u_int addr, nregs, offset = 0; 1274 int error = 0; 1275 1276 switch ((insn >> 24) & 0xf) { 1277 case 0x2: /* add pc, reg1, #value */ 1278 case 0x0: /* add pc, reg1, reg2, lsl #offset */ 1279 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1280 if (((insn >> 16) & 0xf) == 15) 1281 addr += 8; 1282 if (insn & 0x0200000) { 1283 offset = (insn >> 7) & 0x1e; 1284 offset = (insn & 0xff) << (32 - offset) | 1285 (insn & 0xff) >> offset; 1286 } else { 1287 1288 offset = fetch_reg(cookie, insn & 0x0f); 1289 if ((insn & 0x0000ff0) != 0x00000000) { 1290 if (insn & 0x10) 1291 nregs = fetch_reg(cookie, 1292 (insn >> 8) & 0xf); 1293 else 1294 nregs = (insn >> 7) & 0x1f; 1295 switch ((insn >> 5) & 3) { 1296 case 0: 1297 /* lsl */ 1298 offset = offset << nregs; 1299 break; 1300 case 1: 1301 /* lsr */ 1302 offset = offset >> nregs; 1303 break; 1304 default: 1305 break; /* XXX */ 1306 } 1307 1308 } 1309 *new_pc = addr + offset; 1310 return (0); 1311 1312 } 1313 1314 case 0xa: /* b ... */ 1315 case 0xb: /* bl ... */ 1316 addr = ((insn << 2) & 0x03ffffff); 1317 if (addr & 0x02000000) 1318 addr |= 0xfc000000; 1319 *new_pc = (pc + 8 + addr); 1320 return (0); 1321 case 0x7: /* ldr pc, [pc, reg, lsl #2] */ 1322 addr = fetch_reg(cookie, insn & 0xf); 1323 addr = pc + 8 + (addr << 2); 1324 error = read_int(cookie, addr, &addr); 1325 *new_pc = addr; 1326 return (error); 1327 case 0x1: /* mov pc, reg */ 1328 *new_pc = fetch_reg(cookie, insn & 0xf); 1329 return (0); 1330 case 0x4: 1331 case 0x5: /* ldr pc, [reg] */ 1332 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1333 /* ldr pc, [reg, #offset] */ 1334 if (insn & (1 << 24)) 1335 offset = insn & 0xfff; 1336 if (insn & 0x00800000) 1337 addr += offset; 1338 else 1339 addr -= offset; 1340 error = read_int(cookie, addr, &addr); 1341 *new_pc = addr; 1342 1343 return (error); 1344 case 0x8: /* ldmxx reg, {..., pc} */ 1345 case 0x9: 1346 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1347 nregs = (insn & 0x5555) + ((insn >> 1) & 0x5555); 1348 nregs = (nregs & 0x3333) + ((nregs >> 2) & 0x3333); 1349 nregs = (nregs + (nregs >> 4)) & 0x0f0f; 1350 nregs = (nregs + (nregs >> 8)) & 0x001f; 1351 switch ((insn >> 23) & 0x3) { 1352 case 0x0: /* ldmda */ 1353 addr = addr - 0; 1354 break; 1355 case 0x1: /* ldmia */ 1356 addr = addr + 0 + ((nregs - 1) << 2); 1357 break; 1358 case 0x2: /* ldmdb */ 1359 addr = addr - 4; 1360 break; 1361 case 0x3: /* ldmib */ 1362 addr = addr + 4 + ((nregs - 1) << 2); 1363 break; 1364 } 1365 error = read_int(cookie, addr, &addr); 1366 *new_pc = addr; 1367 1368 return (error); 1369 default: 1370 return (EINVAL); 1371 } 1372} 1373 1374#if __ARM_ARCH >= 6 1375void 1376set_stackptrs(int cpu) 1377{ 1378 1379 set_stackptr(PSR_IRQ32_MODE, 1380 irqstack + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1381 set_stackptr(PSR_ABT32_MODE, 1382 abtstack + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1383 set_stackptr(PSR_UND32_MODE, 1384 undstack + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1385} 1386#else 1387void 1388set_stackptrs(int cpu) 1389{ 1390 1391 set_stackptr(PSR_IRQ32_MODE, 1392 irqstack.pv_va + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1393 set_stackptr(PSR_ABT32_MODE, 1394 abtstack.pv_va + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1395 set_stackptr(PSR_UND32_MODE, 1396 undstack.pv_va + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1397} 1398#endif 1399 1400#ifdef EFI 1401static void 1402add_efi_map_entries(struct efi_map_header *efihdr, struct mem_region *mr, 1403 int *mrcnt) 1404{ 1405 struct efi_md *map, *p; 1406 const char *type; 1407 size_t efisz, memory_size; 1408 int ndesc, i, j; 1409 1410 static const char *types[] = { 1411 "Reserved", 1412 "LoaderCode", 1413 "LoaderData", 1414 "BootServicesCode", 1415 "BootServicesData", 1416 "RuntimeServicesCode", 1417 "RuntimeServicesData", 1418 "ConventionalMemory", 1419 "UnusableMemory", 1420 "ACPIReclaimMemory", 1421 "ACPIMemoryNVS", 1422 "MemoryMappedIO", 1423 "MemoryMappedIOPortSpace", 1424 "PalCode" 1425 }; 1426 1427 *mrcnt = 0; 1428 1429 /* 1430 * Memory map data provided by UEFI via the GetMemoryMap 1431 * Boot Services API. 1432 */ 1433 efisz = roundup2(sizeof(struct efi_map_header), 0x10); 1434 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 1435 1436 if (efihdr->descriptor_size == 0) 1437 return; 1438 ndesc = efihdr->memory_size / efihdr->descriptor_size; 1439 1440 if (boothowto & RB_VERBOSE) 1441 printf("%23s %12s %12s %8s %4s\n", 1442 "Type", "Physical", "Virtual", "#Pages", "Attr"); 1443 1444 memory_size = 0; 1445 for (i = 0, j = 0, p = map; i < ndesc; i++, 1446 p = efi_next_descriptor(p, efihdr->descriptor_size)) { 1447 if (boothowto & RB_VERBOSE) { 1448 if (p->md_type <= EFI_MD_TYPE_PALCODE) 1449 type = types[p->md_type]; 1450 else 1451 type = "<INVALID>"; 1452 printf("%23s %012llx %12p %08llx ", type, p->md_phys, 1453 p->md_virt, p->md_pages); 1454 if (p->md_attr & EFI_MD_ATTR_UC) 1455 printf("UC "); 1456 if (p->md_attr & EFI_MD_ATTR_WC) 1457 printf("WC "); 1458 if (p->md_attr & EFI_MD_ATTR_WT) 1459 printf("WT "); 1460 if (p->md_attr & EFI_MD_ATTR_WB) 1461 printf("WB "); 1462 if (p->md_attr & EFI_MD_ATTR_UCE) 1463 printf("UCE "); 1464 if (p->md_attr & EFI_MD_ATTR_WP) 1465 printf("WP "); 1466 if (p->md_attr & EFI_MD_ATTR_RP) 1467 printf("RP "); 1468 if (p->md_attr & EFI_MD_ATTR_XP) 1469 printf("XP "); 1470 if (p->md_attr & EFI_MD_ATTR_RT) 1471 printf("RUNTIME"); 1472 printf("\n"); 1473 } 1474 1475 switch (p->md_type) { 1476 case EFI_MD_TYPE_CODE: 1477 case EFI_MD_TYPE_DATA: 1478 case EFI_MD_TYPE_BS_CODE: 1479 case EFI_MD_TYPE_BS_DATA: 1480 case EFI_MD_TYPE_FREE: 1481 /* 1482 * We're allowed to use any entry with these types. 1483 */ 1484 break; 1485 default: 1486 continue; 1487 } 1488 1489 j++; 1490 if (j >= FDT_MEM_REGIONS) 1491 break; 1492 1493 mr[j].mr_start = p->md_phys; 1494 mr[j].mr_size = p->md_pages * PAGE_SIZE; 1495 memory_size += mr[j].mr_size; 1496 } 1497 1498 *mrcnt = j; 1499} 1500#endif /* EFI */ 1501 1502#ifdef FDT 1503static char * 1504kenv_next(char *cp) 1505{ 1506 1507 if (cp != NULL) { 1508 while (*cp != 0) 1509 cp++; 1510 cp++; 1511 if (*cp == 0) 1512 cp = NULL; 1513 } 1514 return (cp); 1515} 1516 1517static void 1518print_kenv(void) 1519{ 1520 char *cp; 1521 1522 debugf("loader passed (static) kenv:\n"); 1523 if (loader_envp == NULL) { 1524 debugf(" no env, null ptr\n"); 1525 return; 1526 } 1527 debugf(" loader_envp = 0x%08x\n", (uint32_t)loader_envp); 1528 1529 for (cp = loader_envp; cp != NULL; cp = kenv_next(cp)) 1530 debugf(" %x %s\n", (uint32_t)cp, cp); 1531} 1532 1533#if __ARM_ARCH < 6 1534void * 1535initarm(struct arm_boot_params *abp) 1536{ 1537 struct mem_region mem_regions[FDT_MEM_REGIONS]; 1538 struct pv_addr kernel_l1pt; 1539 struct pv_addr dpcpu; 1540 vm_offset_t dtbp, freemempos, l2_start, lastaddr; 1541 uint64_t memsize; 1542 uint32_t l2size; 1543 char *env; 1544 void *kmdp; 1545 u_int l1pagetable; 1546 int i, j, err_devmap, mem_regions_sz; 1547 1548 lastaddr = parse_boot_param(abp); 1549 arm_physmem_kernaddr = abp->abp_physaddr; 1550 1551 memsize = 0; 1552 1553 cpuinfo_init(); 1554 set_cpufuncs(); 1555 1556 /* 1557 * Find the dtb passed in by the boot loader. 1558 */ 1559 kmdp = preload_search_by_type("elf kernel"); 1560 if (kmdp != NULL) 1561 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1562 else 1563 dtbp = (vm_offset_t)NULL; 1564 1565#if defined(FDT_DTB_STATIC) 1566 /* 1567 * In case the device tree blob was not retrieved (from metadata) try 1568 * to use the statically embedded one. 1569 */ 1570 if (dtbp == (vm_offset_t)NULL) 1571 dtbp = (vm_offset_t)&fdt_static_dtb; 1572#endif 1573 1574 if (OF_install(OFW_FDT, 0) == FALSE) 1575 panic("Cannot install FDT"); 1576 1577 if (OF_init((void *)dtbp) != 0) 1578 panic("OF_init failed with the found device tree"); 1579 1580 /* Grab physical memory regions information from device tree. */ 1581 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz, &memsize) != 0) 1582 panic("Cannot get physical memory regions"); 1583 arm_physmem_hardware_regions(mem_regions, mem_regions_sz); 1584 1585 /* Grab reserved memory regions information from device tree. */ 1586 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0) 1587 arm_physmem_exclude_regions(mem_regions, mem_regions_sz, 1588 EXFLAG_NODUMP | EXFLAG_NOALLOC); 1589 1590 /* Platform-specific initialisation */ 1591 platform_probe_and_attach(); 1592 1593 pcpu0_init(); 1594 1595 /* Do basic tuning, hz etc */ 1596 init_param1(); 1597 1598 /* Calculate number of L2 tables needed for mapping vm_page_array */ 1599 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 1600 l2size = (l2size >> L1_S_SHIFT) + 1; 1601 1602 /* 1603 * Add one table for end of kernel map, one for stacks, msgbuf and 1604 * L1 and L2 tables map and one for vectors map. 1605 */ 1606 l2size += 3; 1607 1608 /* Make it divisible by 4 */ 1609 l2size = (l2size + 3) & ~3; 1610 1611 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 1612 1613 /* Define a macro to simplify memory allocation */ 1614#define valloc_pages(var, np) \ 1615 alloc_pages((var).pv_va, (np)); \ 1616 (var).pv_pa = (var).pv_va + (abp->abp_physaddr - KERNVIRTADDR); 1617 1618#define alloc_pages(var, np) \ 1619 (var) = freemempos; \ 1620 freemempos += (np * PAGE_SIZE); \ 1621 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 1622 1623 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 1624 freemempos += PAGE_SIZE; 1625 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 1626 1627 for (i = 0, j = 0; i < l2size; ++i) { 1628 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 1629 valloc_pages(kernel_pt_table[i], 1630 L2_TABLE_SIZE / PAGE_SIZE); 1631 j = i; 1632 } else { 1633 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 1634 L2_TABLE_SIZE_REAL * (i - j); 1635 kernel_pt_table[i].pv_pa = 1636 kernel_pt_table[i].pv_va - KERNVIRTADDR + 1637 abp->abp_physaddr; 1638 1639 } 1640 } 1641 /* 1642 * Allocate a page for the system page mapped to 0x00000000 1643 * or 0xffff0000. This page will just contain the system vectors 1644 * and can be shared by all processes. 1645 */ 1646 valloc_pages(systempage, 1); 1647 1648 /* Allocate dynamic per-cpu area. */ 1649 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 1650 dpcpu_init((void *)dpcpu.pv_va, 0); 1651 1652 /* Allocate stacks for all modes */ 1653 valloc_pages(irqstack, IRQ_STACK_SIZE * MAXCPU); 1654 valloc_pages(abtstack, ABT_STACK_SIZE * MAXCPU); 1655 valloc_pages(undstack, UND_STACK_SIZE * MAXCPU); 1656 valloc_pages(kernelstack, kstack_pages * MAXCPU); 1657 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 1658 1659 /* 1660 * Now we start construction of the L1 page table 1661 * We start by mapping the L2 page tables into the L1. 1662 * This means that we can replace L1 mappings later on if necessary 1663 */ 1664 l1pagetable = kernel_l1pt.pv_va; 1665 1666 /* 1667 * Try to map as much as possible of kernel text and data using 1668 * 1MB section mapping and for the rest of initial kernel address 1669 * space use L2 coarse tables. 1670 * 1671 * Link L2 tables for mapping remainder of kernel (modulo 1MB) 1672 * and kernel structures 1673 */ 1674 l2_start = lastaddr & ~(L1_S_OFFSET); 1675 for (i = 0 ; i < l2size - 1; i++) 1676 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 1677 &kernel_pt_table[i]); 1678 1679 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 1680 1681 /* Map kernel code and data */ 1682 pmap_map_chunk(l1pagetable, KERNVIRTADDR, abp->abp_physaddr, 1683 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 1684 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1685 1686 /* Map L1 directory and allocated L2 page tables */ 1687 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 1688 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1689 1690 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 1691 kernel_pt_table[0].pv_pa, 1692 L2_TABLE_SIZE_REAL * l2size, 1693 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1694 1695 /* Map allocated DPCPU, stacks and msgbuf */ 1696 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 1697 freemempos - dpcpu.pv_va, 1698 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1699 1700 /* Link and map the vector page */ 1701 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 1702 &kernel_pt_table[l2size - 1]); 1703 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 1704 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE); 1705 1706 /* Establish static device mappings. */ 1707 err_devmap = platform_devmap_init(); 1708 devmap_bootstrap(l1pagetable, NULL); 1709 vm_max_kernel_address = platform_lastaddr(); 1710 1711 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT); 1712 pmap_pa = kernel_l1pt.pv_pa; 1713 cpu_setttb(kernel_l1pt.pv_pa); 1714 cpu_tlb_flushID(); 1715 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 1716 1717 /* 1718 * Now that proper page tables are installed, call cpu_setup() to enable 1719 * instruction and data caches and other chip-specific features. 1720 */ 1721 cpu_setup(); 1722 1723 /* 1724 * Only after the SOC registers block is mapped we can perform device 1725 * tree fixups, as they may attempt to read parameters from hardware. 1726 */ 1727 OF_interpret("perform-fixup", 0); 1728 1729 platform_gpio_init(); 1730 1731 cninit(); 1732 1733 debugf("initarm: console initialized\n"); 1734 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1735 debugf(" boothowto = 0x%08x\n", boothowto); 1736 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1737 print_kenv(); 1738 1739 env = kern_getenv("kernelname"); 1740 if (env != NULL) { 1741 strlcpy(kernelname, env, sizeof(kernelname)); 1742 freeenv(env); 1743 } 1744 1745 if (err_devmap != 0) 1746 printf("WARNING: could not fully configure devmap, error=%d\n", 1747 err_devmap); 1748 1749 platform_late_init(); 1750 1751 /* 1752 * Pages were allocated during the secondary bootstrap for the 1753 * stacks for different CPU modes. 1754 * We must now set the r13 registers in the different CPU modes to 1755 * point to these stacks. 1756 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1757 * of the stack memory. 1758 */ 1759 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 1760 1761 set_stackptrs(0); 1762 1763 /* 1764 * We must now clean the cache again.... 1765 * Cleaning may be done by reading new data to displace any 1766 * dirty data in the cache. This will have happened in cpu_setttb() 1767 * but since we are boot strapping the addresses used for the read 1768 * may have just been remapped and thus the cache could be out 1769 * of sync. A re-clean after the switch will cure this. 1770 * After booting there are no gross relocations of the kernel thus 1771 * this problem will not occur after initarm(). 1772 */ 1773 cpu_idcache_wbinv_all(); 1774 1775 undefined_init(); 1776 1777 init_proc0(kernelstack.pv_va); 1778 1779 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1780 pmap_bootstrap(freemempos, &kernel_l1pt); 1781 msgbufp = (void *)msgbufpv.pv_va; 1782 msgbufinit(msgbufp, msgbufsize); 1783 mutex_init(); 1784 1785 /* 1786 * Exclude the kernel (and all the things we allocated which immediately 1787 * follow the kernel) from the VM allocation pool but not from crash 1788 * dumps. virtual_avail is a global variable which tracks the kva we've 1789 * "allocated" while setting up pmaps. 1790 * 1791 * Prepare the list of physical memory available to the vm subsystem. 1792 */ 1793 arm_physmem_exclude_region(abp->abp_physaddr, 1794 (virtual_avail - KERNVIRTADDR), EXFLAG_NOALLOC); 1795 arm_physmem_init_kernel_globals(); 1796 1797 init_param2(physmem); 1798 dbg_monitor_init(); 1799 kdb_init(); 1800 1801 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 1802 sizeof(struct pcb))); 1803} 1804#else /* __ARM_ARCH < 6 */ 1805void * 1806initarm(struct arm_boot_params *abp) 1807{ 1808 struct mem_region mem_regions[FDT_MEM_REGIONS]; 1809 vm_paddr_t lastaddr; 1810 vm_offset_t dtbp, kernelstack, dpcpu; 1811 char *env; 1812 void *kmdp; 1813 int err_devmap, mem_regions_sz; 1814#ifdef EFI 1815 struct efi_map_header *efihdr; 1816#endif 1817 1818 /* get last allocated physical address */ 1819 arm_physmem_kernaddr = abp->abp_physaddr; 1820 lastaddr = parse_boot_param(abp) - KERNVIRTADDR + arm_physmem_kernaddr; 1821 1822 set_cpufuncs(); 1823 cpuinfo_init(); 1824 1825 /* 1826 * Find the dtb passed in by the boot loader. 1827 */ 1828 kmdp = preload_search_by_type("elf kernel"); 1829 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1830#if defined(FDT_DTB_STATIC) 1831 /* 1832 * In case the device tree blob was not retrieved (from metadata) try 1833 * to use the statically embedded one. 1834 */ 1835 if (dtbp == (vm_offset_t)NULL) 1836 dtbp = (vm_offset_t)&fdt_static_dtb; 1837#endif 1838 1839 if (OF_install(OFW_FDT, 0) == FALSE) 1840 panic("Cannot install FDT"); 1841 1842 if (OF_init((void *)dtbp) != 0) 1843 panic("OF_init failed with the found device tree"); 1844 1845#if defined(LINUX_BOOT_ABI) 1846 if (loader_envp == NULL && fdt_get_chosen_bootargs(linux_command_line, 1847 LBABI_MAX_COMMAND_LINE) == 0) 1848 cmdline_set_env(linux_command_line, CMDLINE_GUARD); 1849#endif 1850 1851#ifdef EFI 1852 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 1853 MODINFO_METADATA | MODINFOMD_EFI_MAP); 1854 if (efihdr != NULL) { 1855 add_efi_map_entries(efihdr, mem_regions, &mem_regions_sz); 1856 } else 1857#endif 1858 { 1859 /* Grab physical memory regions information from device tree. */ 1860 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,NULL) != 0) 1861 panic("Cannot get physical memory regions"); 1862 } 1863 arm_physmem_hardware_regions(mem_regions, mem_regions_sz); 1864 1865 /* Grab reserved memory regions information from device tree. */ 1866 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0) 1867 arm_physmem_exclude_regions(mem_regions, mem_regions_sz, 1868 EXFLAG_NODUMP | EXFLAG_NOALLOC); 1869 1870 /* 1871 * Set TEX remapping registers. 1872 * Setup kernel page tables and switch to kernel L1 page table. 1873 */ 1874 pmap_set_tex(); 1875 pmap_bootstrap_prepare(lastaddr); 1876 1877 /* 1878 * Now that proper page tables are installed, call cpu_setup() to enable 1879 * instruction and data caches and other chip-specific features. 1880 */ 1881 cpu_setup(); 1882 1883 /* Platform-specific initialisation */ 1884 platform_probe_and_attach(); 1885 pcpu0_init(); 1886 1887 /* Do basic tuning, hz etc */ 1888 init_param1(); 1889 1890 /* 1891 * Allocate a page for the system page mapped to 0xffff0000 1892 * This page will just contain the system vectors and can be 1893 * shared by all processes. 1894 */ 1895 systempage = pmap_preboot_get_pages(1); 1896 1897 /* Map the vector page. */ 1898 pmap_preboot_map_pages(systempage, ARM_VECTORS_HIGH, 1); 1899 if (virtual_end >= ARM_VECTORS_HIGH) 1900 virtual_end = ARM_VECTORS_HIGH - 1; 1901 1902 /* Allocate dynamic per-cpu area. */ 1903 dpcpu = pmap_preboot_get_vpages(DPCPU_SIZE / PAGE_SIZE); 1904 dpcpu_init((void *)dpcpu, 0); 1905 1906 /* Allocate stacks for all modes */ 1907 irqstack = pmap_preboot_get_vpages(IRQ_STACK_SIZE * MAXCPU); 1908 abtstack = pmap_preboot_get_vpages(ABT_STACK_SIZE * MAXCPU); 1909 undstack = pmap_preboot_get_vpages(UND_STACK_SIZE * MAXCPU ); 1910 kernelstack = pmap_preboot_get_vpages(kstack_pages * MAXCPU); 1911 1912 /* Allocate message buffer. */ 1913 msgbufp = (void *)pmap_preboot_get_vpages( 1914 round_page(msgbufsize) / PAGE_SIZE); 1915 1916 /* 1917 * Pages were allocated during the secondary bootstrap for the 1918 * stacks for different CPU modes. 1919 * We must now set the r13 registers in the different CPU modes to 1920 * point to these stacks. 1921 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1922 * of the stack memory. 1923 */ 1924 set_stackptrs(0); 1925 mutex_init(); 1926 1927 /* Establish static device mappings. */ 1928 err_devmap = platform_devmap_init(); 1929 devmap_bootstrap(0, NULL); 1930 vm_max_kernel_address = platform_lastaddr(); 1931 1932 /* 1933 * Only after the SOC registers block is mapped we can perform device 1934 * tree fixups, as they may attempt to read parameters from hardware. 1935 */ 1936 OF_interpret("perform-fixup", 0); 1937 platform_gpio_init(); 1938 cninit(); 1939 1940 debugf("initarm: console initialized\n"); 1941 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1942 debugf(" boothowto = 0x%08x\n", boothowto); 1943 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1944 debugf(" lastaddr1: 0x%08x\n", lastaddr); 1945 print_kenv(); 1946 1947 env = kern_getenv("kernelname"); 1948 if (env != NULL) 1949 strlcpy(kernelname, env, sizeof(kernelname)); 1950 1951 if (err_devmap != 0) 1952 printf("WARNING: could not fully configure devmap, error=%d\n", 1953 err_devmap); 1954 1955 platform_late_init(); 1956 1957 /* 1958 * We must now clean the cache again.... 1959 * Cleaning may be done by reading new data to displace any 1960 * dirty data in the cache. This will have happened in cpu_setttb() 1961 * but since we are boot strapping the addresses used for the read 1962 * may have just been remapped and thus the cache could be out 1963 * of sync. A re-clean after the switch will cure this. 1964 * After booting there are no gross relocations of the kernel thus 1965 * this problem will not occur after initarm(). 1966 */ 1967 /* Set stack for exception handlers */ 1968 undefined_init(); 1969 init_proc0(kernelstack); 1970 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1971 enable_interrupts(PSR_A); 1972 pmap_bootstrap(0); 1973 1974 /* Exclude the kernel (and all the things we allocated which immediately 1975 * follow the kernel) from the VM allocation pool but not from crash 1976 * dumps. virtual_avail is a global variable which tracks the kva we've 1977 * "allocated" while setting up pmaps. 1978 * 1979 * Prepare the list of physical memory available to the vm subsystem. 1980 */ 1981 arm_physmem_exclude_region(abp->abp_physaddr, 1982 pmap_preboot_get_pages(0) - abp->abp_physaddr, EXFLAG_NOALLOC); 1983 arm_physmem_init_kernel_globals(); 1984 1985 init_param2(physmem); 1986 /* Init message buffer. */ 1987 msgbufinit(msgbufp, msgbufsize); 1988 dbg_monitor_init(); 1989 kdb_init(); 1990 return ((void *)STACKALIGN(thread0.td_pcb)); 1991 1992} 1993 1994#endif /* __ARM_ARCH < 6 */ 1995#endif /* FDT */ 1996