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sys/arm/arm/machdep.c
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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_platform.h" 48 #include "opt_sched.h" 49 #include "opt_timer.h" 50 51 #include <sys/cdefs.h> 52 __FBSDID("$FreeBSD: releng/10.0/sys/arm/arm/machdep.c 255091 2013-08-31 07:08:21Z rpaulo $"); 53 54 #include <sys/param.h> 55 #include <sys/proc.h> 56 #include <sys/systm.h> 57 #include <sys/bio.h> 58 #include <sys/buf.h> 59 #include <sys/bus.h> 60 #include <sys/cons.h> 61 #include <sys/cpu.h> 62 #include <sys/exec.h> 63 #include <sys/imgact.h> 64 #include <sys/kdb.h> 65 #include <sys/kernel.h> 66 #include <sys/ktr.h> 67 #include <sys/linker.h> 68 #include <sys/lock.h> 69 #include <sys/malloc.h> 70 #include <sys/msgbuf.h> 71 #include <sys/mutex.h> 72 #include <sys/pcpu.h> 73 #include <sys/ptrace.h> 74 #include <sys/rwlock.h> 75 #include <sys/sched.h> 76 #include <sys/signalvar.h> 77 #include <sys/syscallsubr.h> 78 #include <sys/sysctl.h> 79 #include <sys/sysent.h> 80 #include <sys/sysproto.h> 81 #include <sys/uio.h> 82 83 #include <vm/vm.h> 84 #include <vm/pmap.h> 85 #include <vm/vm_map.h> 86 #include <vm/vm_object.h> 87 #include <vm/vm_page.h> 88 #include <vm/vm_pager.h> 89 90 #include <machine/armreg.h> 91 #include <machine/atags.h> 92 #include <machine/cpu.h> 93 #include <machine/machdep.h> 94 #include <machine/md_var.h> 95 #include <machine/metadata.h> 96 #include <machine/pcb.h> 97 #include <machine/pmap.h> 98 #include <machine/reg.h> 99 #include <machine/trap.h> 100 #include <machine/undefined.h> 101 #include <machine/vmparam.h> 102 #include <machine/sysarch.h> 103 104 #ifdef FDT 105 #include <dev/fdt/fdt_common.h> 106 #include <dev/ofw/openfirm.h> 107 #endif 108 109 #ifdef DEBUG 110 #define debugf(fmt, args...) printf(fmt, ##args) 111 #else 112 #define debugf(fmt, args...) 113 #endif 114 115 struct pcpu __pcpu[MAXCPU]; 116 struct pcpu *pcpup = &__pcpu[0]; 117 118 static struct trapframe proc0_tf; 119 uint32_t cpu_reset_address = 0; 120 int cold = 1; 121 vm_offset_t vector_page; 122 123 long realmem = 0; 124 125 int (*_arm_memcpy)(void *, void *, int, int) = NULL; 126 int (*_arm_bzero)(void *, int, int) = NULL; 127 int _min_memcpy_size = 0; 128 int _min_bzero_size = 0; 129 130 extern int *end; 131 #ifdef DDB 132 extern vm_offset_t ksym_start, ksym_end; 133 #endif 134 135 #ifdef FDT 136 /* 137 * This is the number of L2 page tables required for covering max 138 * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 139 * stacks etc.), uprounded to be divisible by 4. 140 */ 141 #define KERNEL_PT_MAX 78 142 143 static struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 144 145 vm_paddr_t phys_avail[10]; 146 vm_paddr_t dump_avail[4]; 147 148 extern u_int data_abort_handler_address; 149 extern u_int prefetch_abort_handler_address; 150 extern u_int undefined_handler_address; 151 152 vm_paddr_t pmap_pa; 153 154 struct pv_addr systempage; 155 static struct pv_addr msgbufpv; 156 struct pv_addr irqstack; 157 struct pv_addr undstack; 158 struct pv_addr abtstack; 159 static struct pv_addr kernelstack; 160 161 const struct pmap_devmap *pmap_devmap_bootstrap_table; 162 #endif 163 164 #if defined(LINUX_BOOT_ABI) 165 #define LBABI_MAX_BANKS 10 166 167 uint32_t board_id; 168 struct arm_lbabi_tag *atag_list; 169 char linux_command_line[LBABI_MAX_COMMAND_LINE + 1]; 170 char atags[LBABI_MAX_COMMAND_LINE * 2]; 171 uint32_t memstart[LBABI_MAX_BANKS]; 172 uint32_t memsize[LBABI_MAX_BANKS]; 173 uint32_t membanks; 174 #endif 175 176 static uint32_t board_revision; 177 /* hex representation of uint64_t */ 178 static char board_serial[32]; 179 180 SYSCTL_NODE(_hw, OID_AUTO, board, CTLFLAG_RD, 0, "Board attributes"); 181 SYSCTL_UINT(_hw_board, OID_AUTO, revision, CTLFLAG_RD, 182 &board_revision, 0, "Board revision"); 183 SYSCTL_STRING(_hw_board, OID_AUTO, serial, CTLFLAG_RD, 184 board_serial, 0, "Board serial"); 185 186 int vfp_exists; 187 SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD, 188 &vfp_exists, 0, "Floating point support enabled"); 189 190 void 191 board_set_serial(uint64_t serial) 192 { 193 194 snprintf(board_serial, sizeof(board_serial)-1, 195 "%016jx", serial); 196 } 197 198 void 199 board_set_revision(uint32_t revision) 200 { 201 202 board_revision = revision; 203 } 204 205 void 206 sendsig(catcher, ksi, mask) 207 sig_t catcher; 208 ksiginfo_t *ksi; 209 sigset_t *mask; 210 { 211 struct thread *td; 212 struct proc *p; 213 struct trapframe *tf; 214 struct sigframe *fp, frame; 215 struct sigacts *psp; 216 int onstack; 217 int sig; 218 int code; 219 220 td = curthread; 221 p = td->td_proc; 222 PROC_LOCK_ASSERT(p, MA_OWNED); 223 sig = ksi->ksi_signo; 224 code = ksi->ksi_code; 225 psp = p->p_sigacts; 226 mtx_assert(&psp->ps_mtx, MA_OWNED); 227 tf = td->td_frame; 228 onstack = sigonstack(tf->tf_usr_sp); 229 230 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 231 catcher, sig); 232 233 /* Allocate and validate space for the signal handler context. */ 234 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !(onstack) && 235 SIGISMEMBER(psp->ps_sigonstack, sig)) { 236 fp = (struct sigframe *)(td->td_sigstk.ss_sp + 237 td->td_sigstk.ss_size); 238 #if defined(COMPAT_43) 239 td->td_sigstk.ss_flags |= SS_ONSTACK; 240 #endif 241 } else 242 fp = (struct sigframe *)td->td_frame->tf_usr_sp; 243 244 /* make room on the stack */ 245 fp--; 246 247 /* make the stack aligned */ 248 fp = (struct sigframe *)STACKALIGN(fp); 249 /* Populate the siginfo frame. */ 250 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); 251 frame.sf_si = ksi->ksi_info; 252 frame.sf_uc.uc_sigmask = *mask; 253 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK ) 254 ? ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE; 255 frame.sf_uc.uc_stack = td->td_sigstk; 256 mtx_unlock(&psp->ps_mtx); 257 PROC_UNLOCK(td->td_proc); 258 259 /* Copy the sigframe out to the user's stack. */ 260 if (copyout(&frame, fp, sizeof(*fp)) != 0) { 261 /* Process has trashed its stack. Kill it. */ 262 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 263 PROC_LOCK(p); 264 sigexit(td, SIGILL); 265 } 266 267 /* Translate the signal if appropriate. */ 268 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 269 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 270 271 /* 272 * Build context to run handler in. We invoke the handler 273 * directly, only returning via the trampoline. Note the 274 * trampoline version numbers are coordinated with machine- 275 * dependent code in libc. 276 */ 277 278 tf->tf_r0 = sig; 279 tf->tf_r1 = (register_t)&fp->sf_si; 280 tf->tf_r2 = (register_t)&fp->sf_uc; 281 282 /* the trampoline uses r5 as the uc address */ 283 tf->tf_r5 = (register_t)&fp->sf_uc; 284 tf->tf_pc = (register_t)catcher; 285 tf->tf_usr_sp = (register_t)fp; 286 tf->tf_usr_lr = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 287 288 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr, 289 tf->tf_usr_sp); 290 291 PROC_LOCK(p); 292 mtx_lock(&psp->ps_mtx); 293 } 294 295 struct kva_md_info kmi; 296 297 /* 298 * arm32_vector_init: 299 * 300 * Initialize the vector page, and select whether or not to 301 * relocate the vectors. 302 * 303 * NOTE: We expect the vector page to be mapped at its expected 304 * destination. 305 */ 306 307 extern unsigned int page0[], page0_data[]; 308 void 309 arm_vector_init(vm_offset_t va, int which) 310 { 311 unsigned int *vectors = (int *) va; 312 unsigned int *vectors_data = vectors + (page0_data - page0); 313 int vec; 314 315 /* 316 * Loop through the vectors we're taking over, and copy the 317 * vector's insn and data word. 318 */ 319 for (vec = 0; vec < ARM_NVEC; vec++) { 320 if ((which & (1 << vec)) == 0) { 321 /* Don't want to take over this vector. */ 322 continue; 323 } 324 vectors[vec] = page0[vec]; 325 vectors_data[vec] = page0_data[vec]; 326 } 327 328 /* Now sync the vectors. */ 329 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 330 331 vector_page = va; 332 333 if (va == ARM_VECTORS_HIGH) { 334 /* 335 * Assume the MD caller knows what it's doing here, and 336 * really does want the vector page relocated. 337 * 338 * Note: This has to be done here (and not just in 339 * cpu_setup()) because the vector page needs to be 340 * accessible *before* cpu_startup() is called. 341 * Think ddb(9) ... 342 * 343 * NOTE: If the CPU control register is not readable, 344 * this will totally fail! We'll just assume that 345 * any system that has high vector support has a 346 * readable CPU control register, for now. If we 347 * ever encounter one that does not, we'll have to 348 * rethink this. 349 */ 350 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 351 } 352 } 353 354 static void 355 cpu_startup(void *dummy) 356 { 357 struct pcb *pcb = thread0.td_pcb; 358 #ifdef ARM_TP_ADDRESS 359 #ifndef ARM_CACHE_LOCK_ENABLE 360 vm_page_t m; 361 #endif 362 #endif 363 364 cpu_setup(""); 365 identify_arm_cpu(); 366 367 printf("real memory = %ju (%ju MB)\n", (uintmax_t)ptoa(physmem), 368 (uintmax_t)ptoa(physmem) / 1048576); 369 realmem = physmem; 370 371 /* 372 * Display the RAM layout. 373 */ 374 if (bootverbose) { 375 int indx; 376 377 printf("Physical memory chunk(s):\n"); 378 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 379 vm_paddr_t size; 380 381 size = phys_avail[indx + 1] - phys_avail[indx]; 382 printf("%#08jx - %#08jx, %ju bytes (%ju pages)\n", 383 (uintmax_t)phys_avail[indx], 384 (uintmax_t)phys_avail[indx + 1] - 1, 385 (uintmax_t)size, (uintmax_t)size / PAGE_SIZE); 386 } 387 } 388 389 vm_ksubmap_init(&kmi); 390 391 printf("avail memory = %ju (%ju MB)\n", 392 (uintmax_t)ptoa(cnt.v_free_count), 393 (uintmax_t)ptoa(cnt.v_free_count) / 1048576); 394 395 bufinit(); 396 vm_pager_bufferinit(); 397 pcb->un_32.pcb32_und_sp = (u_int)thread0.td_kstack + 398 USPACE_UNDEF_STACK_TOP; 399 pcb->un_32.pcb32_sp = (u_int)thread0.td_kstack + 400 USPACE_SVC_STACK_TOP; 401 vector_page_setprot(VM_PROT_READ); 402 pmap_set_pcb_pagedir(pmap_kernel(), pcb); 403 pmap_postinit(); 404 #ifdef ARM_TP_ADDRESS 405 #ifdef ARM_CACHE_LOCK_ENABLE 406 pmap_kenter_user(ARM_TP_ADDRESS, ARM_TP_ADDRESS); 407 arm_lock_cache_line(ARM_TP_ADDRESS); 408 #else 409 m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_ZERO); 410 pmap_kenter_user(ARM_TP_ADDRESS, VM_PAGE_TO_PHYS(m)); 411 #endif 412 *(uint32_t *)ARM_RAS_START = 0; 413 *(uint32_t *)ARM_RAS_END = 0xffffffff; 414 #endif 415 } 416 417 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 418 419 /* 420 * Flush the D-cache for non-DMA I/O so that the I-cache can 421 * be made coherent later. 422 */ 423 void 424 cpu_flush_dcache(void *ptr, size_t len) 425 { 426 427 cpu_dcache_wb_range((uintptr_t)ptr, len); 428 cpu_l2cache_wb_range((uintptr_t)ptr, len); 429 } 430 431 /* Get current clock frequency for the given cpu id. */ 432 int 433 cpu_est_clockrate(int cpu_id, uint64_t *rate) 434 { 435 436 return (ENXIO); 437 } 438 439 void 440 cpu_idle(int busy) 441 { 442 443 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", 444 busy, curcpu); 445 #ifndef NO_EVENTTIMERS 446 if (!busy) { 447 critical_enter(); 448 cpu_idleclock(); 449 } 450 #endif 451 if (!sched_runnable()) 452 cpu_sleep(0); 453 #ifndef NO_EVENTTIMERS 454 if (!busy) { 455 cpu_activeclock(); 456 critical_exit(); 457 } 458 #endif 459 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done", 460 busy, curcpu); 461 } 462 463 int 464 cpu_idle_wakeup(int cpu) 465 { 466 467 return (0); 468 } 469 470 int 471 fill_regs(struct thread *td, struct reg *regs) 472 { 473 struct trapframe *tf = td->td_frame; 474 bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 475 regs->r_sp = tf->tf_usr_sp; 476 regs->r_lr = tf->tf_usr_lr; 477 regs->r_pc = tf->tf_pc; 478 regs->r_cpsr = tf->tf_spsr; 479 return (0); 480 } 481 int 482 fill_fpregs(struct thread *td, struct fpreg *regs) 483 { 484 bzero(regs, sizeof(*regs)); 485 return (0); 486 } 487 488 int 489 set_regs(struct thread *td, struct reg *regs) 490 { 491 struct trapframe *tf = td->td_frame; 492 493 bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 494 tf->tf_usr_sp = regs->r_sp; 495 tf->tf_usr_lr = regs->r_lr; 496 tf->tf_pc = regs->r_pc; 497 tf->tf_spsr &= ~PSR_FLAGS; 498 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 499 return (0); 500 } 501 502 int 503 set_fpregs(struct thread *td, struct fpreg *regs) 504 { 505 return (0); 506 } 507 508 int 509 fill_dbregs(struct thread *td, struct dbreg *regs) 510 { 511 return (0); 512 } 513 int 514 set_dbregs(struct thread *td, struct dbreg *regs) 515 { 516 return (0); 517 } 518 519 520 static int 521 ptrace_read_int(struct thread *td, vm_offset_t addr, u_int32_t *v) 522 { 523 struct iovec iov; 524 struct uio uio; 525 526 PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 527 iov.iov_base = (caddr_t) v; 528 iov.iov_len = sizeof(u_int32_t); 529 uio.uio_iov = &iov; 530 uio.uio_iovcnt = 1; 531 uio.uio_offset = (off_t)addr; 532 uio.uio_resid = sizeof(u_int32_t); 533 uio.uio_segflg = UIO_SYSSPACE; 534 uio.uio_rw = UIO_READ; 535 uio.uio_td = td; 536 return proc_rwmem(td->td_proc, &uio); 537 } 538 539 static int 540 ptrace_write_int(struct thread *td, vm_offset_t addr, u_int32_t v) 541 { 542 struct iovec iov; 543 struct uio uio; 544 545 PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 546 iov.iov_base = (caddr_t) &v; 547 iov.iov_len = sizeof(u_int32_t); 548 uio.uio_iov = &iov; 549 uio.uio_iovcnt = 1; 550 uio.uio_offset = (off_t)addr; 551 uio.uio_resid = sizeof(u_int32_t); 552 uio.uio_segflg = UIO_SYSSPACE; 553 uio.uio_rw = UIO_WRITE; 554 uio.uio_td = td; 555 return proc_rwmem(td->td_proc, &uio); 556 } 557 558 int 559 ptrace_single_step(struct thread *td) 560 { 561 struct proc *p; 562 int error; 563 564 KASSERT(td->td_md.md_ptrace_instr == 0, 565 ("Didn't clear single step")); 566 p = td->td_proc; 567 PROC_UNLOCK(p); 568 error = ptrace_read_int(td, td->td_frame->tf_pc + 4, 569 &td->td_md.md_ptrace_instr); 570 if (error) 571 goto out; 572 error = ptrace_write_int(td, td->td_frame->tf_pc + 4, 573 PTRACE_BREAKPOINT); 574 if (error) 575 td->td_md.md_ptrace_instr = 0; 576 td->td_md.md_ptrace_addr = td->td_frame->tf_pc + 4; 577 out: 578 PROC_LOCK(p); 579 return (error); 580 } 581 582 int 583 ptrace_clear_single_step(struct thread *td) 584 { 585 struct proc *p; 586 587 if (td->td_md.md_ptrace_instr) { 588 p = td->td_proc; 589 PROC_UNLOCK(p); 590 ptrace_write_int(td, td->td_md.md_ptrace_addr, 591 td->td_md.md_ptrace_instr); 592 PROC_LOCK(p); 593 td->td_md.md_ptrace_instr = 0; 594 } 595 return (0); 596 } 597 598 int 599 ptrace_set_pc(struct thread *td, unsigned long addr) 600 { 601 td->td_frame->tf_pc = addr; 602 return (0); 603 } 604 605 void 606 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 607 { 608 } 609 610 void 611 spinlock_enter(void) 612 { 613 struct thread *td; 614 register_t cspr; 615 616 td = curthread; 617 if (td->td_md.md_spinlock_count == 0) { 618 cspr = disable_interrupts(I32_bit | F32_bit); 619 td->td_md.md_spinlock_count = 1; 620 td->td_md.md_saved_cspr = cspr; 621 } else 622 td->td_md.md_spinlock_count++; 623 critical_enter(); 624 } 625 626 void 627 spinlock_exit(void) 628 { 629 struct thread *td; 630 register_t cspr; 631 632 td = curthread; 633 critical_exit(); 634 cspr = td->td_md.md_saved_cspr; 635 td->td_md.md_spinlock_count--; 636 if (td->td_md.md_spinlock_count == 0) 637 restore_interrupts(cspr); 638 } 639 640 /* 641 * Clear registers on exec 642 */ 643 void 644 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 645 { 646 struct trapframe *tf = td->td_frame; 647 648 memset(tf, 0, sizeof(*tf)); 649 tf->tf_usr_sp = stack; 650 tf->tf_usr_lr = imgp->entry_addr; 651 tf->tf_svc_lr = 0x77777777; 652 tf->tf_pc = imgp->entry_addr; 653 tf->tf_spsr = PSR_USR32_MODE; 654 } 655 656 /* 657 * Get machine context. 658 */ 659 int 660 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 661 { 662 struct trapframe *tf = td->td_frame; 663 __greg_t *gr = mcp->__gregs; 664 665 if (clear_ret & GET_MC_CLEAR_RET) 666 gr[_REG_R0] = 0; 667 else 668 gr[_REG_R0] = tf->tf_r0; 669 gr[_REG_R1] = tf->tf_r1; 670 gr[_REG_R2] = tf->tf_r2; 671 gr[_REG_R3] = tf->tf_r3; 672 gr[_REG_R4] = tf->tf_r4; 673 gr[_REG_R5] = tf->tf_r5; 674 gr[_REG_R6] = tf->tf_r6; 675 gr[_REG_R7] = tf->tf_r7; 676 gr[_REG_R8] = tf->tf_r8; 677 gr[_REG_R9] = tf->tf_r9; 678 gr[_REG_R10] = tf->tf_r10; 679 gr[_REG_R11] = tf->tf_r11; 680 gr[_REG_R12] = tf->tf_r12; 681 gr[_REG_SP] = tf->tf_usr_sp; 682 gr[_REG_LR] = tf->tf_usr_lr; 683 gr[_REG_PC] = tf->tf_pc; 684 gr[_REG_CPSR] = tf->tf_spsr; 685 686 return (0); 687 } 688 689 /* 690 * Set machine context. 691 * 692 * However, we don't set any but the user modifiable flags, and we won't 693 * touch the cs selector. 694 */ 695 int 696 set_mcontext(struct thread *td, const mcontext_t *mcp) 697 { 698 struct trapframe *tf = td->td_frame; 699 const __greg_t *gr = mcp->__gregs; 700 701 tf->tf_r0 = gr[_REG_R0]; 702 tf->tf_r1 = gr[_REG_R1]; 703 tf->tf_r2 = gr[_REG_R2]; 704 tf->tf_r3 = gr[_REG_R3]; 705 tf->tf_r4 = gr[_REG_R4]; 706 tf->tf_r5 = gr[_REG_R5]; 707 tf->tf_r6 = gr[_REG_R6]; 708 tf->tf_r7 = gr[_REG_R7]; 709 tf->tf_r8 = gr[_REG_R8]; 710 tf->tf_r9 = gr[_REG_R9]; 711 tf->tf_r10 = gr[_REG_R10]; 712 tf->tf_r11 = gr[_REG_R11]; 713 tf->tf_r12 = gr[_REG_R12]; 714 tf->tf_usr_sp = gr[_REG_SP]; 715 tf->tf_usr_lr = gr[_REG_LR]; 716 tf->tf_pc = gr[_REG_PC]; 717 tf->tf_spsr = gr[_REG_CPSR]; 718 719 return (0); 720 } 721 722 /* 723 * MPSAFE 724 */ 725 int 726 sys_sigreturn(td, uap) 727 struct thread *td; 728 struct sigreturn_args /* { 729 const struct __ucontext *sigcntxp; 730 } */ *uap; 731 { 732 struct sigframe sf; 733 struct trapframe *tf; 734 int spsr; 735 736 if (uap == NULL) 737 return (EFAULT); 738 if (copyin(uap->sigcntxp, &sf, sizeof(sf))) 739 return (EFAULT); 740 /* 741 * Make sure the processor mode has not been tampered with and 742 * interrupts have not been disabled. 743 */ 744 spsr = sf.sf_uc.uc_mcontext.__gregs[_REG_CPSR]; 745 if ((spsr & PSR_MODE) != PSR_USR32_MODE || 746 (spsr & (I32_bit | F32_bit)) != 0) 747 return (EINVAL); 748 /* Restore register context. */ 749 tf = td->td_frame; 750 set_mcontext(td, &sf.sf_uc.uc_mcontext); 751 752 /* Restore signal mask. */ 753 kern_sigprocmask(td, SIG_SETMASK, &sf.sf_uc.uc_sigmask, NULL, 0); 754 755 return (EJUSTRETURN); 756 } 757 758 759 /* 760 * Construct a PCB from a trapframe. This is called from kdb_trap() where 761 * we want to start a backtrace from the function that caused us to enter 762 * the debugger. We have the context in the trapframe, but base the trace 763 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 764 * enough for a backtrace. 765 */ 766 void 767 makectx(struct trapframe *tf, struct pcb *pcb) 768 { 769 pcb->un_32.pcb32_r8 = tf->tf_r8; 770 pcb->un_32.pcb32_r9 = tf->tf_r9; 771 pcb->un_32.pcb32_r10 = tf->tf_r10; 772 pcb->un_32.pcb32_r11 = tf->tf_r11; 773 pcb->un_32.pcb32_r12 = tf->tf_r12; 774 pcb->un_32.pcb32_pc = tf->tf_pc; 775 pcb->un_32.pcb32_lr = tf->tf_usr_lr; 776 pcb->un_32.pcb32_sp = tf->tf_usr_sp; 777 } 778 779 /* 780 * Make a standard dump_avail array. Can't make the phys_avail 781 * since we need to do that after we call pmap_bootstrap, but this 782 * is needed before pmap_boostrap. 783 * 784 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before 785 * calling pmap_bootstrap. 786 */ 787 void 788 arm_dump_avail_init(vm_offset_t ramsize, size_t max) 789 { 790 #ifdef LINUX_BOOT_ABI 791 /* 792 * Linux boot loader passes us the actual banks of memory, so use them 793 * to construct the dump_avail array. 794 */ 795 if (membanks > 0) 796 { 797 int i, j; 798 799 if (max < (membanks + 1) * 2) 800 panic("dump_avail[%d] too small for %d banks\n", 801 max, membanks); 802 for (j = 0, i = 0; i < membanks; i++) { 803 dump_avail[j++] = round_page(memstart[i]); 804 dump_avail[j++] = trunc_page(memstart[i] + memsize[i]); 805 } 806 dump_avail[j++] = 0; 807 dump_avail[j++] = 0; 808 return; 809 } 810 #endif 811 if (max < 4) 812 panic("dump_avail too small\n"); 813 814 dump_avail[0] = round_page(PHYSADDR); 815 dump_avail[1] = trunc_page(PHYSADDR + ramsize); 816 dump_avail[2] = 0; 817 dump_avail[3] = 0; 818 } 819 820 /* 821 * Fake up a boot descriptor table 822 */ 823 vm_offset_t 824 fake_preload_metadata(struct arm_boot_params *abp __unused) 825 { 826 #ifdef DDB 827 vm_offset_t zstart = 0, zend = 0; 828 #endif 829 vm_offset_t lastaddr; 830 int i = 0; 831 static uint32_t fake_preload[35]; 832 833 fake_preload[i++] = MODINFO_NAME; 834 fake_preload[i++] = strlen("kernel") + 1; 835 strcpy((char*)&fake_preload[i++], "kernel"); 836 i += 1; 837 fake_preload[i++] = MODINFO_TYPE; 838 fake_preload[i++] = strlen("elf kernel") + 1; 839 strcpy((char*)&fake_preload[i++], "elf kernel"); 840 i += 2; 841 fake_preload[i++] = MODINFO_ADDR; 842 fake_preload[i++] = sizeof(vm_offset_t); 843 fake_preload[i++] = KERNVIRTADDR; 844 fake_preload[i++] = MODINFO_SIZE; 845 fake_preload[i++] = sizeof(uint32_t); 846 fake_preload[i++] = (uint32_t)&end - KERNVIRTADDR; 847 #ifdef DDB 848 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 849 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 850 fake_preload[i++] = sizeof(vm_offset_t); 851 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 852 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 853 fake_preload[i++] = sizeof(vm_offset_t); 854 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 855 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 856 zend = lastaddr; 857 zstart = *(uint32_t *)(KERNVIRTADDR + 4); 858 ksym_start = zstart; 859 ksym_end = zend; 860 } else 861 #endif 862 lastaddr = (vm_offset_t)&end; 863 fake_preload[i++] = 0; 864 fake_preload[i] = 0; 865 preload_metadata = (void *)fake_preload; 866 867 return (lastaddr); 868 } 869 870 void 871 pcpu0_init(void) 872 { 873 #if ARM_ARCH_6 || ARM_ARCH_7A || defined(CPU_MV_PJ4B) 874 set_pcpu(pcpup); 875 #endif 876 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 877 PCPU_SET(curthread, &thread0); 878 #ifdef VFP 879 PCPU_SET(cpu, 0); 880 #endif 881 } 882 883 #if defined(LINUX_BOOT_ABI) 884 vm_offset_t 885 linux_parse_boot_param(struct arm_boot_params *abp) 886 { 887 struct arm_lbabi_tag *walker; 888 uint32_t revision; 889 uint64_t serial; 890 891 /* 892 * Linux boot ABI: r0 = 0, r1 is the board type (!= 0) and r2 893 * is atags or dtb pointer. If all of these aren't satisfied, 894 * then punt. 895 */ 896 if (!(abp->abp_r0 == 0 && abp->abp_r1 != 0 && abp->abp_r2 != 0)) 897 return 0; 898 899 board_id = abp->abp_r1; 900 walker = (struct arm_lbabi_tag *) 901 (abp->abp_r2 + KERNVIRTADDR - KERNPHYSADDR); 902 903 /* xxx - Need to also look for binary device tree */ 904 if (ATAG_TAG(walker) != ATAG_CORE) 905 return 0; 906 907 atag_list = walker; 908 while (ATAG_TAG(walker) != ATAG_NONE) { 909 switch (ATAG_TAG(walker)) { 910 case ATAG_CORE: 911 break; 912 case ATAG_MEM: 913 if (membanks < LBABI_MAX_BANKS) { 914 memstart[membanks] = walker->u.tag_mem.start; 915 memsize[membanks] = walker->u.tag_mem.size; 916 } 917 membanks++; 918 break; 919 case ATAG_INITRD2: 920 break; 921 case ATAG_SERIAL: 922 serial = walker->u.tag_sn.low | 923 ((uint64_t)walker->u.tag_sn.high << 32); 924 board_set_serial(serial); 925 break; 926 case ATAG_REVISION: 927 revision = walker->u.tag_rev.rev; 928 board_set_revision(revision); 929 break; 930 case ATAG_CMDLINE: 931 /* XXX open question: Parse this for boothowto? */ 932 bcopy(walker->u.tag_cmd.command, linux_command_line, 933 ATAG_SIZE(walker)); 934 break; 935 default: 936 break; 937 } 938 walker = ATAG_NEXT(walker); 939 } 940 941 /* Save a copy for later */ 942 bcopy(atag_list, atags, 943 (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); 944 945 return fake_preload_metadata(abp); 946 } 947 #endif 948 949 #if defined(FREEBSD_BOOT_LOADER) 950 vm_offset_t 951 freebsd_parse_boot_param(struct arm_boot_params *abp) 952 { 953 vm_offset_t lastaddr = 0; 954 void *mdp; 955 void *kmdp; 956 957 /* 958 * Mask metadata pointer: it is supposed to be on page boundary. If 959 * the first argument (mdp) doesn't point to a valid address the 960 * bootloader must have passed us something else than the metadata 961 * ptr, so we give up. Also give up if we cannot find metadta section 962 * the loader creates that we get all this data out of. 963 */ 964 965 if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL) 966 return 0; 967 preload_metadata = mdp; 968 kmdp = preload_search_by_type("elf kernel"); 969 if (kmdp == NULL) 970 return 0; 971 972 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 973 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 974 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 975 #ifdef DDB 976 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 977 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 978 #endif 979 preload_addr_relocate = KERNVIRTADDR - KERNPHYSADDR; 980 return lastaddr; 981 } 982 #endif 983 984 vm_offset_t 985 default_parse_boot_param(struct arm_boot_params *abp) 986 { 987 vm_offset_t lastaddr; 988 989 #if defined(LINUX_BOOT_ABI) 990 if ((lastaddr = linux_parse_boot_param(abp)) != 0) 991 return lastaddr; 992 #endif 993 #if defined(FREEBSD_BOOT_LOADER) 994 if ((lastaddr = freebsd_parse_boot_param(abp)) != 0) 995 return lastaddr; 996 #endif 997 /* Fall back to hardcoded metadata. */ 998 lastaddr = fake_preload_metadata(abp); 999 1000 return lastaddr; 1001 } 1002 1003 /* 1004 * Stub version of the boot parameter parsing routine. We are 1005 * called early in initarm, before even VM has been initialized. 1006 * This routine needs to preserve any data that the boot loader 1007 * has passed in before the kernel starts to grow past the end 1008 * of the BSS, traditionally the place boot-loaders put this data. 1009 * 1010 * Since this is called so early, things that depend on the vm system 1011 * being setup (including access to some SoC's serial ports), about 1012 * all that can be done in this routine is to copy the arguments. 1013 * 1014 * This is the default boot parameter parsing routine. Individual 1015 * kernels/boards can override this weak function with one of their 1016 * own. We just fake metadata... 1017 */ 1018 __weak_reference(default_parse_boot_param, parse_boot_param); 1019 1020 /* 1021 * Initialize proc0 1022 */ 1023 void 1024 init_proc0(vm_offset_t kstack) 1025 { 1026 proc_linkup0(&proc0, &thread0); 1027 thread0.td_kstack = kstack; 1028 thread0.td_pcb = (struct pcb *) 1029 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 1030 thread0.td_pcb->pcb_flags = 0; 1031 thread0.td_frame = &proc0_tf; 1032 pcpup->pc_curpcb = thread0.td_pcb; 1033 } 1034 1035 void 1036 set_stackptrs(int cpu) 1037 { 1038 1039 set_stackptr(PSR_IRQ32_MODE, 1040 irqstack.pv_va + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1041 set_stackptr(PSR_ABT32_MODE, 1042 abtstack.pv_va + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1043 set_stackptr(PSR_UND32_MODE, 1044 undstack.pv_va + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1045 } 1046 1047 #ifdef FDT 1048 static char * 1049 kenv_next(char *cp) 1050 { 1051 1052 if (cp != NULL) { 1053 while (*cp != 0) 1054 cp++; 1055 cp++; 1056 if (*cp == 0) 1057 cp = NULL; 1058 } 1059 return (cp); 1060 } 1061 1062 static void 1063 print_kenv(void) 1064 { 1065 int len; 1066 char *cp; 1067 1068 debugf("loader passed (static) kenv:\n"); 1069 if (kern_envp == NULL) { 1070 debugf(" no env, null ptr\n"); 1071 return; 1072 } 1073 debugf(" kern_envp = 0x%08x\n", (uint32_t)kern_envp); 1074 1075 len = 0; 1076 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) 1077 debugf(" %x %s\n", (uint32_t)cp, cp); 1078 } 1079 1080 static void 1081 physmap_init(struct mem_region *availmem_regions, int availmem_regions_sz) 1082 { 1083 int i, j, cnt; 1084 vm_offset_t phys_kernelend, kernload; 1085 uint32_t s, e, sz; 1086 struct mem_region *mp, *mp1; 1087 1088 phys_kernelend = KERNPHYSADDR + (virtual_avail - KERNVIRTADDR); 1089 kernload = KERNPHYSADDR; 1090 1091 /* 1092 * Remove kernel physical address range from avail 1093 * regions list. Page align all regions. 1094 * Non-page aligned memory isn't very interesting to us. 1095 * Also, sort the entries for ascending addresses. 1096 */ 1097 sz = 0; 1098 cnt = availmem_regions_sz; 1099 debugf("processing avail regions:\n"); 1100 for (mp = availmem_regions; mp->mr_size; mp++) { 1101 s = mp->mr_start; 1102 e = mp->mr_start + mp->mr_size; 1103 debugf(" %08x-%08x -> ", s, e); 1104 /* Check whether this region holds all of the kernel. */ 1105 if (s < kernload && e > phys_kernelend) { 1106 availmem_regions[cnt].mr_start = phys_kernelend; 1107 availmem_regions[cnt++].mr_size = e - phys_kernelend; 1108 e = kernload; 1109 } 1110 /* Look whether this regions starts within the kernel. */ 1111 if (s >= kernload && s < phys_kernelend) { 1112 if (e <= phys_kernelend) 1113 goto empty; 1114 s = phys_kernelend; 1115 } 1116 /* Now look whether this region ends within the kernel. */ 1117 if (e > kernload && e <= phys_kernelend) { 1118 if (s >= kernload) { 1119 goto empty; 1120 } 1121 e = kernload; 1122 } 1123 /* Now page align the start and size of the region. */ 1124 s = round_page(s); 1125 e = trunc_page(e); 1126 if (e < s) 1127 e = s; 1128 sz = e - s; 1129 debugf("%08x-%08x = %x\n", s, e, sz); 1130 1131 /* Check whether some memory is left here. */ 1132 if (sz == 0) { 1133 empty: 1134 printf("skipping\n"); 1135 bcopy(mp + 1, mp, 1136 (cnt - (mp - availmem_regions)) * sizeof(*mp)); 1137 cnt--; 1138 mp--; 1139 continue; 1140 } 1141 1142 /* Do an insertion sort. */ 1143 for (mp1 = availmem_regions; mp1 < mp; mp1++) 1144 if (s < mp1->mr_start) 1145 break; 1146 if (mp1 < mp) { 1147 bcopy(mp1, mp1 + 1, (char *)mp - (char *)mp1); 1148 mp1->mr_start = s; 1149 mp1->mr_size = sz; 1150 } else { 1151 mp->mr_start = s; 1152 mp->mr_size = sz; 1153 } 1154 } 1155 availmem_regions_sz = cnt; 1156 1157 /* Fill in phys_avail table, based on availmem_regions */ 1158 debugf("fill in phys_avail:\n"); 1159 for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { 1160 1161 debugf(" region: 0x%08x - 0x%08x (0x%08x)\n", 1162 availmem_regions[i].mr_start, 1163 availmem_regions[i].mr_start + availmem_regions[i].mr_size, 1164 availmem_regions[i].mr_size); 1165 1166 /* 1167 * We should not map the page at PA 0x0000000, the VM can't 1168 * handle it, as pmap_extract() == 0 means failure. 1169 */ 1170 if (availmem_regions[i].mr_start > 0 || 1171 availmem_regions[i].mr_size > PAGE_SIZE) { 1172 phys_avail[j] = availmem_regions[i].mr_start; 1173 if (phys_avail[j] == 0) 1174 phys_avail[j] += PAGE_SIZE; 1175 phys_avail[j + 1] = availmem_regions[i].mr_start + 1176 availmem_regions[i].mr_size; 1177 } else 1178 j -= 2; 1179 } 1180 phys_avail[j] = 0; 1181 phys_avail[j + 1] = 0; 1182 } 1183 1184 void * 1185 initarm(struct arm_boot_params *abp) 1186 { 1187 struct mem_region memory_regions[FDT_MEM_REGIONS]; 1188 struct mem_region availmem_regions[FDT_MEM_REGIONS]; 1189 struct mem_region reserved_regions[FDT_MEM_REGIONS]; 1190 struct pv_addr kernel_l1pt; 1191 struct pv_addr dpcpu; 1192 vm_offset_t dtbp, freemempos, l2_start, lastaddr; 1193 uint32_t memsize, l2size; 1194 char *env; 1195 void *kmdp; 1196 u_int l1pagetable; 1197 int i = 0, j = 0, err_devmap = 0; 1198 int memory_regions_sz; 1199 int availmem_regions_sz; 1200 int reserved_regions_sz; 1201 vm_offset_t start, end; 1202 vm_offset_t rstart, rend; 1203 int curr; 1204 1205 lastaddr = parse_boot_param(abp); 1206 memsize = 0; 1207 set_cpufuncs(); 1208 1209 /* 1210 * Find the dtb passed in by the boot loader. 1211 */ 1212 kmdp = preload_search_by_type("elf kernel"); 1213 if (kmdp != NULL) 1214 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1215 else 1216 dtbp = (vm_offset_t)NULL; 1217 1218 #if defined(FDT_DTB_STATIC) 1219 /* 1220 * In case the device tree blob was not retrieved (from metadata) try 1221 * to use the statically embedded one. 1222 */ 1223 if (dtbp == (vm_offset_t)NULL) 1224 dtbp = (vm_offset_t)&fdt_static_dtb; 1225 #endif 1226 1227 if (OF_install(OFW_FDT, 0) == FALSE) 1228 while (1); 1229 1230 if (OF_init((void *)dtbp) != 0) 1231 while (1); 1232 1233 /* Grab physical memory regions information from device tree. */ 1234 if (fdt_get_mem_regions(memory_regions, &memory_regions_sz, 1235 &memsize) != 0) 1236 while(1); 1237 1238 /* Grab physical memory regions information from device tree. */ 1239 if (fdt_get_reserved_regions(reserved_regions, &reserved_regions_sz) != 0) 1240 reserved_regions_sz = 0; 1241 1242 /* 1243 * Now exclude all the reserved regions 1244 */ 1245 curr = 0; 1246 for (i = 0; i < memory_regions_sz; i++) { 1247 start = memory_regions[i].mr_start; 1248 end = start + memory_regions[i].mr_size; 1249 for (j = 0; j < reserved_regions_sz; j++) { 1250 rstart = reserved_regions[j].mr_start; 1251 rend = rstart + reserved_regions[j].mr_size; 1252 /* 1253 * Restricted region is before available 1254 * Skip restricted region 1255 */ 1256 if (rend <= start) 1257 continue; 1258 /* 1259 * Restricted region is behind available 1260 * No further processing required 1261 */ 1262 if (rstart >= end) 1263 break; 1264 /* 1265 * Restricted region includes memory region 1266 * skip available region 1267 */ 1268 if ((start >= rstart) && (rend >= end)) { 1269 start = rend; 1270 end = rend; 1271 break; 1272 } 1273 /* 1274 * Memory region includes restricted region 1275 */ 1276 if ((rstart > start) && (end > rend)) { 1277 availmem_regions[curr].mr_start = start; 1278 availmem_regions[curr++].mr_size = rstart - start; 1279 start = rend; 1280 break; 1281 } 1282 /* 1283 * Memory region partially overlaps with restricted 1284 */ 1285 if ((rstart >= start) && (rstart <= end)) { 1286 end = rstart; 1287 } 1288 else if ((rend >= start) && (rend <= end)) { 1289 start = rend; 1290 } 1291 } 1292 1293 if (end > start) { 1294 availmem_regions[curr].mr_start = start; 1295 availmem_regions[curr++].mr_size = end - start; 1296 } 1297 } 1298 1299 availmem_regions_sz = curr; 1300 1301 /* Platform-specific initialisation */ 1302 vm_max_kernel_address = initarm_lastaddr(); 1303 1304 pcpu0_init(); 1305 1306 /* Do basic tuning, hz etc */ 1307 init_param1(); 1308 1309 /* Calculate number of L2 tables needed for mapping vm_page_array */ 1310 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 1311 l2size = (l2size >> L1_S_SHIFT) + 1; 1312 1313 /* 1314 * Add one table for end of kernel map, one for stacks, msgbuf and 1315 * L1 and L2 tables map and one for vectors map. 1316 */ 1317 l2size += 3; 1318 1319 /* Make it divisible by 4 */ 1320 l2size = (l2size + 3) & ~3; 1321 1322 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 1323 1324 /* Define a macro to simplify memory allocation */ 1325 #define valloc_pages(var, np) \ 1326 alloc_pages((var).pv_va, (np)); \ 1327 (var).pv_pa = (var).pv_va + (KERNPHYSADDR - KERNVIRTADDR); 1328 1329 #define alloc_pages(var, np) \ 1330 (var) = freemempos; \ 1331 freemempos += (np * PAGE_SIZE); \ 1332 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 1333 1334 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 1335 freemempos += PAGE_SIZE; 1336 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 1337 1338 for (i = 0; i < l2size; ++i) { 1339 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 1340 valloc_pages(kernel_pt_table[i], 1341 L2_TABLE_SIZE / PAGE_SIZE); 1342 j = i; 1343 } else { 1344 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 1345 L2_TABLE_SIZE_REAL * (i - j); 1346 kernel_pt_table[i].pv_pa = 1347 kernel_pt_table[i].pv_va - KERNVIRTADDR + 1348 KERNPHYSADDR; 1349 1350 } 1351 } 1352 /* 1353 * Allocate a page for the system page mapped to 0x00000000 1354 * or 0xffff0000. This page will just contain the system vectors 1355 * and can be shared by all processes. 1356 */ 1357 valloc_pages(systempage, 1); 1358 1359 /* Allocate dynamic per-cpu area. */ 1360 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 1361 dpcpu_init((void *)dpcpu.pv_va, 0); 1362 1363 /* Allocate stacks for all modes */ 1364 valloc_pages(irqstack, IRQ_STACK_SIZE * MAXCPU); 1365 valloc_pages(abtstack, ABT_STACK_SIZE * MAXCPU); 1366 valloc_pages(undstack, UND_STACK_SIZE * MAXCPU); 1367 valloc_pages(kernelstack, KSTACK_PAGES * MAXCPU); 1368 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 1369 1370 /* 1371 * Now we start construction of the L1 page table 1372 * We start by mapping the L2 page tables into the L1. 1373 * This means that we can replace L1 mappings later on if necessary 1374 */ 1375 l1pagetable = kernel_l1pt.pv_va; 1376 1377 /* 1378 * Try to map as much as possible of kernel text and data using 1379 * 1MB section mapping and for the rest of initial kernel address 1380 * space use L2 coarse tables. 1381 * 1382 * Link L2 tables for mapping remainder of kernel (modulo 1MB) 1383 * and kernel structures 1384 */ 1385 l2_start = lastaddr & ~(L1_S_OFFSET); 1386 for (i = 0 ; i < l2size - 1; i++) 1387 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 1388 &kernel_pt_table[i]); 1389 1390 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 1391 1392 /* Map kernel code and data */ 1393 pmap_map_chunk(l1pagetable, KERNVIRTADDR, KERNPHYSADDR, 1394 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 1395 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1396 1397 1398 /* Map L1 directory and allocated L2 page tables */ 1399 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 1400 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1401 1402 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 1403 kernel_pt_table[0].pv_pa, 1404 L2_TABLE_SIZE_REAL * l2size, 1405 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1406 1407 /* Map allocated DPCPU, stacks and msgbuf */ 1408 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 1409 freemempos - dpcpu.pv_va, 1410 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1411 1412 /* Link and map the vector page */ 1413 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 1414 &kernel_pt_table[l2size - 1]); 1415 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 1416 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE); 1417 1418 /* Map pmap_devmap[] entries */ 1419 err_devmap = platform_devmap_init(); 1420 pmap_devmap_bootstrap(l1pagetable, pmap_devmap_bootstrap_table); 1421 1422 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT); 1423 pmap_pa = kernel_l1pt.pv_pa; 1424 setttb(kernel_l1pt.pv_pa); 1425 cpu_tlb_flushID(); 1426 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 1427 1428 /* 1429 * Only after the SOC registers block is mapped we can perform device 1430 * tree fixups, as they may attempt to read parameters from hardware. 1431 */ 1432 OF_interpret("perform-fixup", 0); 1433 1434 initarm_gpio_init(); 1435 1436 cninit(); 1437 1438 physmem = memsize / PAGE_SIZE; 1439 1440 debugf("initarm: console initialized\n"); 1441 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1442 debugf(" boothowto = 0x%08x\n", boothowto); 1443 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1444 print_kenv(); 1445 1446 env = getenv("kernelname"); 1447 if (env != NULL) 1448 strlcpy(kernelname, env, sizeof(kernelname)); 1449 1450 if (err_devmap != 0) 1451 printf("WARNING: could not fully configure devmap, error=%d\n", 1452 err_devmap); 1453 1454 initarm_late_init(); 1455 1456 /* 1457 * Pages were allocated during the secondary bootstrap for the 1458 * stacks for different CPU modes. 1459 * We must now set the r13 registers in the different CPU modes to 1460 * point to these stacks. 1461 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1462 * of the stack memory. 1463 */ 1464 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 1465 1466 set_stackptrs(0); 1467 1468 /* 1469 * We must now clean the cache again.... 1470 * Cleaning may be done by reading new data to displace any 1471 * dirty data in the cache. This will have happened in setttb() 1472 * but since we are boot strapping the addresses used for the read 1473 * may have just been remapped and thus the cache could be out 1474 * of sync. A re-clean after the switch will cure this. 1475 * After booting there are no gross relocations of the kernel thus 1476 * this problem will not occur after initarm(). 1477 */ 1478 cpu_idcache_wbinv_all(); 1479 1480 /* Set stack for exception handlers */ 1481 data_abort_handler_address = (u_int)data_abort_handler; 1482 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 1483 undefined_handler_address = (u_int)undefinedinstruction_bounce; 1484 undefined_init(); 1485 1486 init_proc0(kernelstack.pv_va); 1487 1488 arm_intrnames_init(); 1489 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1490 arm_dump_avail_init(memsize, sizeof(dump_avail) / sizeof(dump_avail[0])); 1491 pmap_bootstrap(freemempos, &kernel_l1pt); 1492 msgbufp = (void *)msgbufpv.pv_va; 1493 msgbufinit(msgbufp, msgbufsize); 1494 mutex_init(); 1495 1496 /* 1497 * Prepare map of physical memory regions available to vm subsystem. 1498 */ 1499 physmap_init(availmem_regions, availmem_regions_sz); 1500 1501 init_param2(physmem); 1502 kdb_init(); 1503 1504 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 1505 sizeof(struct pcb))); 1506 } 1507 #endif
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