FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/machdep.c
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: releng/11.0/sys/arm/arm/machdep.c 300694 2016-05-25 19:44:26Z ian $");
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
129 DB_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
163 DB_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
189 struct pcpu __pcpu[MAXCPU];
190 struct pcpu *pcpup = &__pcpu[0];
191
192 static struct trapframe proc0_tf;
193 uint32_t cpu_reset_address = 0;
194 int cold = 1;
195 vm_offset_t vector_page;
196
197 int (*_arm_memcpy)(void *, void *, int, int) = NULL;
198 int (*_arm_bzero)(void *, int, int) = NULL;
199 int _min_memcpy_size = 0;
200 int _min_bzero_size = 0;
201
202 extern int *end;
203
204 #ifdef FDT
205 static char *loader_envp;
206
207 vm_paddr_t pmap_pa;
208
209 #if __ARM_ARCH >= 6
210 vm_offset_t systempage;
211 vm_offset_t irqstack;
212 vm_offset_t undstack;
213 vm_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
222 static struct pv_addr kernel_pt_table[KERNEL_PT_MAX];
223
224 struct pv_addr systempage;
225 static struct pv_addr msgbufpv;
226 struct pv_addr irqstack;
227 struct pv_addr undstack;
228 struct pv_addr abtstack;
229 static 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:"
237 uint32_t board_id;
238 struct arm_lbabi_tag *atag_list;
239 char linux_command_line[LBABI_MAX_COMMAND_LINE + 1];
240 char atags[LBABI_MAX_COMMAND_LINE * 2];
241 uint32_t memstart[LBABI_MAX_BANKS];
242 uint32_t memsize[LBABI_MAX_BANKS];
243 uint32_t membanks;
244 #endif
245 #ifdef MULTIDELAY
246 static delay_func *delay_impl;
247 static void *delay_arg;
248 #endif
249
250 static uint32_t board_revision;
251 /* hex representation of uint64_t */
252 static char board_serial[32];
253
254 SYSCTL_NODE(_hw, OID_AUTO, board, CTLFLAG_RD, 0, "Board attributes");
255 SYSCTL_UINT(_hw_board, OID_AUTO, revision, CTLFLAG_RD,
256 &board_revision, 0, "Board revision");
257 SYSCTL_STRING(_hw_board, OID_AUTO, serial, CTLFLAG_RD,
258 board_serial, 0, "Board serial");
259
260 int vfp_exists;
261 SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD,
262 &vfp_exists, 0, "Floating point support enabled");
263
264 void
265 board_set_serial(uint64_t serial)
266 {
267
268 snprintf(board_serial, sizeof(board_serial)-1,
269 "%016jx", serial);
270 }
271
272 void
273 board_set_revision(uint32_t revision)
274 {
275
276 board_revision = revision;
277 }
278
279 void
280 sendsig(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
378 struct 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
390 extern unsigned int page0[], page0_data[];
391 void
392 arm_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
432 static void
433 cpu_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
479 SYSINIT(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 */
485 void
486 cpu_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. */
493 int
494 cpu_est_clockrate(int cpu_id, uint64_t *rate)
495 {
496
497 return (ENXIO);
498 }
499
500 void
501 cpu_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
520 int
521 cpu_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 */
534 void
535 arm_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
552 void
553 arm_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
561 void
562 DELAY(int usec)
563 {
564
565 delay_impl(usec, delay_arg);
566 }
567 #endif
568
569 int
570 fill_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 }
580 int
581 fill_fpregs(struct thread *td, struct fpreg *regs)
582 {
583 bzero(regs, sizeof(*regs));
584 return (0);
585 }
586
587 int
588 set_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
601 int
602 set_fpregs(struct thread *td, struct fpreg *regs)
603 {
604 return (0);
605 }
606
607 int
608 fill_dbregs(struct thread *td, struct dbreg *regs)
609 {
610 return (0);
611 }
612 int
613 set_dbregs(struct thread *td, struct dbreg *regs)
614 {
615 return (0);
616 }
617
618
619 static int
620 ptrace_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
628 static int
629 ptrace_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
637 static u_int
638 ptrace_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
664 static u_int
665 ptrace_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 */
689 static int
690 ptrace_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
706 int
707 ptrace_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
758 out:
759 PROC_LOCK(p);
760 return ((error != 0) && (error_alt != 0));
761 }
762
763 int
764 ptrace_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
793 int
794 ptrace_set_pc(struct thread *td, unsigned long addr)
795 {
796 td->td_frame->tf_pc = addr;
797 return (0);
798 }
799
800 void
801 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
802 {
803 }
804
805 void
806 spinlock_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
821 void
822 spinlock_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 */
838 void
839 exec_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 */
854 int
855 get_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 */
892 int
893 set_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 */
922 int
923 sys_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 */
961 void
962 makectx(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 */
981 vm_offset_t
982 fake_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
1040 void
1041 pcpu0_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. */
1053 static void
1054 cmdline_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
1095 vm_offset_t
1096 linux_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)
1177 vm_offset_t
1178 freebsd_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
1216 vm_offset_t
1217 default_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 */
1255 void
1256 init_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
1269 int
1270 arm_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
1375 void
1376 set_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
1387 void
1388 set_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
1401 #define efi_next_descriptor(ptr, size) \
1402 ((struct efi_md *)(((uint8_t *) ptr) + size))
1403
1404 static void
1405 add_efi_map_entries(struct efi_map_header *efihdr, struct mem_region *mr,
1406 int *mrcnt)
1407 {
1408 struct efi_md *map, *p;
1409 const char *type;
1410 size_t efisz, memory_size;
1411 int ndesc, i, j;
1412
1413 static const char *types[] = {
1414 "Reserved",
1415 "LoaderCode",
1416 "LoaderData",
1417 "BootServicesCode",
1418 "BootServicesData",
1419 "RuntimeServicesCode",
1420 "RuntimeServicesData",
1421 "ConventionalMemory",
1422 "UnusableMemory",
1423 "ACPIReclaimMemory",
1424 "ACPIMemoryNVS",
1425 "MemoryMappedIO",
1426 "MemoryMappedIOPortSpace",
1427 "PalCode"
1428 };
1429
1430 *mrcnt = 0;
1431
1432 /*
1433 * Memory map data provided by UEFI via the GetMemoryMap
1434 * Boot Services API.
1435 */
1436 efisz = roundup2(sizeof(struct efi_map_header), 0x10);
1437 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
1438
1439 if (efihdr->descriptor_size == 0)
1440 return;
1441 ndesc = efihdr->memory_size / efihdr->descriptor_size;
1442
1443 if (boothowto & RB_VERBOSE)
1444 printf("%23s %12s %12s %8s %4s\n",
1445 "Type", "Physical", "Virtual", "#Pages", "Attr");
1446
1447 memory_size = 0;
1448 for (i = 0, j = 0, p = map; i < ndesc; i++,
1449 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
1450 if (boothowto & RB_VERBOSE) {
1451 if (p->md_type <= EFI_MD_TYPE_PALCODE)
1452 type = types[p->md_type];
1453 else
1454 type = "<INVALID>";
1455 printf("%23s %012llx %12p %08llx ", type, p->md_phys,
1456 p->md_virt, p->md_pages);
1457 if (p->md_attr & EFI_MD_ATTR_UC)
1458 printf("UC ");
1459 if (p->md_attr & EFI_MD_ATTR_WC)
1460 printf("WC ");
1461 if (p->md_attr & EFI_MD_ATTR_WT)
1462 printf("WT ");
1463 if (p->md_attr & EFI_MD_ATTR_WB)
1464 printf("WB ");
1465 if (p->md_attr & EFI_MD_ATTR_UCE)
1466 printf("UCE ");
1467 if (p->md_attr & EFI_MD_ATTR_WP)
1468 printf("WP ");
1469 if (p->md_attr & EFI_MD_ATTR_RP)
1470 printf("RP ");
1471 if (p->md_attr & EFI_MD_ATTR_XP)
1472 printf("XP ");
1473 if (p->md_attr & EFI_MD_ATTR_RT)
1474 printf("RUNTIME");
1475 printf("\n");
1476 }
1477
1478 switch (p->md_type) {
1479 case EFI_MD_TYPE_CODE:
1480 case EFI_MD_TYPE_DATA:
1481 case EFI_MD_TYPE_BS_CODE:
1482 case EFI_MD_TYPE_BS_DATA:
1483 case EFI_MD_TYPE_FREE:
1484 /*
1485 * We're allowed to use any entry with these types.
1486 */
1487 break;
1488 default:
1489 continue;
1490 }
1491
1492 j++;
1493 if (j >= FDT_MEM_REGIONS)
1494 break;
1495
1496 mr[j].mr_start = p->md_phys;
1497 mr[j].mr_size = p->md_pages * PAGE_SIZE;
1498 memory_size += mr[j].mr_size;
1499 }
1500
1501 *mrcnt = j;
1502 }
1503 #endif /* EFI */
1504
1505 #ifdef FDT
1506 static char *
1507 kenv_next(char *cp)
1508 {
1509
1510 if (cp != NULL) {
1511 while (*cp != 0)
1512 cp++;
1513 cp++;
1514 if (*cp == 0)
1515 cp = NULL;
1516 }
1517 return (cp);
1518 }
1519
1520 static void
1521 print_kenv(void)
1522 {
1523 char *cp;
1524
1525 debugf("loader passed (static) kenv:\n");
1526 if (loader_envp == NULL) {
1527 debugf(" no env, null ptr\n");
1528 return;
1529 }
1530 debugf(" loader_envp = 0x%08x\n", (uint32_t)loader_envp);
1531
1532 for (cp = loader_envp; cp != NULL; cp = kenv_next(cp))
1533 debugf(" %x %s\n", (uint32_t)cp, cp);
1534 }
1535
1536 #if __ARM_ARCH < 6
1537 void *
1538 initarm(struct arm_boot_params *abp)
1539 {
1540 struct mem_region mem_regions[FDT_MEM_REGIONS];
1541 struct pv_addr kernel_l1pt;
1542 struct pv_addr dpcpu;
1543 vm_offset_t dtbp, freemempos, l2_start, lastaddr;
1544 uint64_t memsize;
1545 uint32_t l2size;
1546 char *env;
1547 void *kmdp;
1548 u_int l1pagetable;
1549 int i, j, err_devmap, mem_regions_sz;
1550
1551 lastaddr = parse_boot_param(abp);
1552 arm_physmem_kernaddr = abp->abp_physaddr;
1553
1554 memsize = 0;
1555
1556 cpuinfo_init();
1557 set_cpufuncs();
1558
1559 /*
1560 * Find the dtb passed in by the boot loader.
1561 */
1562 kmdp = preload_search_by_type("elf kernel");
1563 if (kmdp != NULL)
1564 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
1565 else
1566 dtbp = (vm_offset_t)NULL;
1567
1568 #if defined(FDT_DTB_STATIC)
1569 /*
1570 * In case the device tree blob was not retrieved (from metadata) try
1571 * to use the statically embedded one.
1572 */
1573 if (dtbp == (vm_offset_t)NULL)
1574 dtbp = (vm_offset_t)&fdt_static_dtb;
1575 #endif
1576
1577 if (OF_install(OFW_FDT, 0) == FALSE)
1578 panic("Cannot install FDT");
1579
1580 if (OF_init((void *)dtbp) != 0)
1581 panic("OF_init failed with the found device tree");
1582
1583 /* Grab physical memory regions information from device tree. */
1584 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz, &memsize) != 0)
1585 panic("Cannot get physical memory regions");
1586 arm_physmem_hardware_regions(mem_regions, mem_regions_sz);
1587
1588 /* Grab reserved memory regions information from device tree. */
1589 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0)
1590 arm_physmem_exclude_regions(mem_regions, mem_regions_sz,
1591 EXFLAG_NODUMP | EXFLAG_NOALLOC);
1592
1593 /* Platform-specific initialisation */
1594 platform_probe_and_attach();
1595
1596 pcpu0_init();
1597
1598 /* Do basic tuning, hz etc */
1599 init_param1();
1600
1601 /* Calculate number of L2 tables needed for mapping vm_page_array */
1602 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page);
1603 l2size = (l2size >> L1_S_SHIFT) + 1;
1604
1605 /*
1606 * Add one table for end of kernel map, one for stacks, msgbuf and
1607 * L1 and L2 tables map and one for vectors map.
1608 */
1609 l2size += 3;
1610
1611 /* Make it divisible by 4 */
1612 l2size = (l2size + 3) & ~3;
1613
1614 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK;
1615
1616 /* Define a macro to simplify memory allocation */
1617 #define valloc_pages(var, np) \
1618 alloc_pages((var).pv_va, (np)); \
1619 (var).pv_pa = (var).pv_va + (abp->abp_physaddr - KERNVIRTADDR);
1620
1621 #define alloc_pages(var, np) \
1622 (var) = freemempos; \
1623 freemempos += (np * PAGE_SIZE); \
1624 memset((char *)(var), 0, ((np) * PAGE_SIZE));
1625
1626 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
1627 freemempos += PAGE_SIZE;
1628 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
1629
1630 for (i = 0, j = 0; i < l2size; ++i) {
1631 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
1632 valloc_pages(kernel_pt_table[i],
1633 L2_TABLE_SIZE / PAGE_SIZE);
1634 j = i;
1635 } else {
1636 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va +
1637 L2_TABLE_SIZE_REAL * (i - j);
1638 kernel_pt_table[i].pv_pa =
1639 kernel_pt_table[i].pv_va - KERNVIRTADDR +
1640 abp->abp_physaddr;
1641
1642 }
1643 }
1644 /*
1645 * Allocate a page for the system page mapped to 0x00000000
1646 * or 0xffff0000. This page will just contain the system vectors
1647 * and can be shared by all processes.
1648 */
1649 valloc_pages(systempage, 1);
1650
1651 /* Allocate dynamic per-cpu area. */
1652 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
1653 dpcpu_init((void *)dpcpu.pv_va, 0);
1654
1655 /* Allocate stacks for all modes */
1656 valloc_pages(irqstack, IRQ_STACK_SIZE * MAXCPU);
1657 valloc_pages(abtstack, ABT_STACK_SIZE * MAXCPU);
1658 valloc_pages(undstack, UND_STACK_SIZE * MAXCPU);
1659 valloc_pages(kernelstack, kstack_pages * MAXCPU);
1660 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
1661
1662 /*
1663 * Now we start construction of the L1 page table
1664 * We start by mapping the L2 page tables into the L1.
1665 * This means that we can replace L1 mappings later on if necessary
1666 */
1667 l1pagetable = kernel_l1pt.pv_va;
1668
1669 /*
1670 * Try to map as much as possible of kernel text and data using
1671 * 1MB section mapping and for the rest of initial kernel address
1672 * space use L2 coarse tables.
1673 *
1674 * Link L2 tables for mapping remainder of kernel (modulo 1MB)
1675 * and kernel structures
1676 */
1677 l2_start = lastaddr & ~(L1_S_OFFSET);
1678 for (i = 0 ; i < l2size - 1; i++)
1679 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE,
1680 &kernel_pt_table[i]);
1681
1682 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE;
1683
1684 /* Map kernel code and data */
1685 pmap_map_chunk(l1pagetable, KERNVIRTADDR, abp->abp_physaddr,
1686 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK,
1687 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1688
1689 /* Map L1 directory and allocated L2 page tables */
1690 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
1691 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
1692
1693 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va,
1694 kernel_pt_table[0].pv_pa,
1695 L2_TABLE_SIZE_REAL * l2size,
1696 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
1697
1698 /* Map allocated DPCPU, stacks and msgbuf */
1699 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa,
1700 freemempos - dpcpu.pv_va,
1701 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1702
1703 /* Link and map the vector page */
1704 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH,
1705 &kernel_pt_table[l2size - 1]);
1706 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
1707 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE);
1708
1709 /* Establish static device mappings. */
1710 err_devmap = platform_devmap_init();
1711 devmap_bootstrap(l1pagetable, NULL);
1712 vm_max_kernel_address = platform_lastaddr();
1713
1714 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT);
1715 pmap_pa = kernel_l1pt.pv_pa;
1716 cpu_setttb(kernel_l1pt.pv_pa);
1717 cpu_tlb_flushID();
1718 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2));
1719
1720 /*
1721 * Now that proper page tables are installed, call cpu_setup() to enable
1722 * instruction and data caches and other chip-specific features.
1723 */
1724 cpu_setup();
1725
1726 /*
1727 * Only after the SOC registers block is mapped we can perform device
1728 * tree fixups, as they may attempt to read parameters from hardware.
1729 */
1730 OF_interpret("perform-fixup", 0);
1731
1732 platform_gpio_init();
1733
1734 cninit();
1735
1736 debugf("initarm: console initialized\n");
1737 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp);
1738 debugf(" boothowto = 0x%08x\n", boothowto);
1739 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp);
1740 print_kenv();
1741
1742 env = kern_getenv("kernelname");
1743 if (env != NULL) {
1744 strlcpy(kernelname, env, sizeof(kernelname));
1745 freeenv(env);
1746 }
1747
1748 if (err_devmap != 0)
1749 printf("WARNING: could not fully configure devmap, error=%d\n",
1750 err_devmap);
1751
1752 platform_late_init();
1753
1754 /*
1755 * Pages were allocated during the secondary bootstrap for the
1756 * stacks for different CPU modes.
1757 * We must now set the r13 registers in the different CPU modes to
1758 * point to these stacks.
1759 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
1760 * of the stack memory.
1761 */
1762 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE);
1763
1764 set_stackptrs(0);
1765
1766 /*
1767 * We must now clean the cache again....
1768 * Cleaning may be done by reading new data to displace any
1769 * dirty data in the cache. This will have happened in cpu_setttb()
1770 * but since we are boot strapping the addresses used for the read
1771 * may have just been remapped and thus the cache could be out
1772 * of sync. A re-clean after the switch will cure this.
1773 * After booting there are no gross relocations of the kernel thus
1774 * this problem will not occur after initarm().
1775 */
1776 cpu_idcache_wbinv_all();
1777
1778 undefined_init();
1779
1780 init_proc0(kernelstack.pv_va);
1781
1782 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
1783 pmap_bootstrap(freemempos, &kernel_l1pt);
1784 msgbufp = (void *)msgbufpv.pv_va;
1785 msgbufinit(msgbufp, msgbufsize);
1786 mutex_init();
1787
1788 /*
1789 * Exclude the kernel (and all the things we allocated which immediately
1790 * follow the kernel) from the VM allocation pool but not from crash
1791 * dumps. virtual_avail is a global variable which tracks the kva we've
1792 * "allocated" while setting up pmaps.
1793 *
1794 * Prepare the list of physical memory available to the vm subsystem.
1795 */
1796 arm_physmem_exclude_region(abp->abp_physaddr,
1797 (virtual_avail - KERNVIRTADDR), EXFLAG_NOALLOC);
1798 arm_physmem_init_kernel_globals();
1799
1800 init_param2(physmem);
1801 dbg_monitor_init();
1802 kdb_init();
1803
1804 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
1805 sizeof(struct pcb)));
1806 }
1807 #else /* __ARM_ARCH < 6 */
1808 void *
1809 initarm(struct arm_boot_params *abp)
1810 {
1811 struct mem_region mem_regions[FDT_MEM_REGIONS];
1812 vm_paddr_t lastaddr;
1813 vm_offset_t dtbp, kernelstack, dpcpu;
1814 char *env;
1815 void *kmdp;
1816 int err_devmap, mem_regions_sz;
1817 #ifdef EFI
1818 struct efi_map_header *efihdr;
1819 #endif
1820
1821 /* get last allocated physical address */
1822 arm_physmem_kernaddr = abp->abp_physaddr;
1823 lastaddr = parse_boot_param(abp) - KERNVIRTADDR + arm_physmem_kernaddr;
1824
1825 set_cpufuncs();
1826 cpuinfo_init();
1827
1828 /*
1829 * Find the dtb passed in by the boot loader.
1830 */
1831 kmdp = preload_search_by_type("elf kernel");
1832 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
1833 #if defined(FDT_DTB_STATIC)
1834 /*
1835 * In case the device tree blob was not retrieved (from metadata) try
1836 * to use the statically embedded one.
1837 */
1838 if (dtbp == (vm_offset_t)NULL)
1839 dtbp = (vm_offset_t)&fdt_static_dtb;
1840 #endif
1841
1842 if (OF_install(OFW_FDT, 0) == FALSE)
1843 panic("Cannot install FDT");
1844
1845 if (OF_init((void *)dtbp) != 0)
1846 panic("OF_init failed with the found device tree");
1847
1848 #if defined(LINUX_BOOT_ABI)
1849 if (loader_envp == NULL && fdt_get_chosen_bootargs(linux_command_line,
1850 LBABI_MAX_COMMAND_LINE) == 0)
1851 cmdline_set_env(linux_command_line, CMDLINE_GUARD);
1852 #endif
1853
1854 #ifdef EFI
1855 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1856 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1857 if (efihdr != NULL) {
1858 add_efi_map_entries(efihdr, mem_regions, &mem_regions_sz);
1859 } else
1860 #endif
1861 {
1862 /* Grab physical memory regions information from device tree. */
1863 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,NULL) != 0)
1864 panic("Cannot get physical memory regions");
1865 }
1866 arm_physmem_hardware_regions(mem_regions, mem_regions_sz);
1867
1868 /* Grab reserved memory regions information from device tree. */
1869 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0)
1870 arm_physmem_exclude_regions(mem_regions, mem_regions_sz,
1871 EXFLAG_NODUMP | EXFLAG_NOALLOC);
1872
1873 /*
1874 * Set TEX remapping registers.
1875 * Setup kernel page tables and switch to kernel L1 page table.
1876 */
1877 pmap_set_tex();
1878 pmap_bootstrap_prepare(lastaddr);
1879
1880 /*
1881 * Now that proper page tables are installed, call cpu_setup() to enable
1882 * instruction and data caches and other chip-specific features.
1883 */
1884 cpu_setup();
1885
1886 /* Platform-specific initialisation */
1887 platform_probe_and_attach();
1888 pcpu0_init();
1889
1890 /* Do basic tuning, hz etc */
1891 init_param1();
1892
1893 /*
1894 * Allocate a page for the system page mapped to 0xffff0000
1895 * This page will just contain the system vectors and can be
1896 * shared by all processes.
1897 */
1898 systempage = pmap_preboot_get_pages(1);
1899
1900 /* Map the vector page. */
1901 pmap_preboot_map_pages(systempage, ARM_VECTORS_HIGH, 1);
1902 if (virtual_end >= ARM_VECTORS_HIGH)
1903 virtual_end = ARM_VECTORS_HIGH - 1;
1904
1905 /* Allocate dynamic per-cpu area. */
1906 dpcpu = pmap_preboot_get_vpages(DPCPU_SIZE / PAGE_SIZE);
1907 dpcpu_init((void *)dpcpu, 0);
1908
1909 /* Allocate stacks for all modes */
1910 irqstack = pmap_preboot_get_vpages(IRQ_STACK_SIZE * MAXCPU);
1911 abtstack = pmap_preboot_get_vpages(ABT_STACK_SIZE * MAXCPU);
1912 undstack = pmap_preboot_get_vpages(UND_STACK_SIZE * MAXCPU );
1913 kernelstack = pmap_preboot_get_vpages(kstack_pages * MAXCPU);
1914
1915 /* Allocate message buffer. */
1916 msgbufp = (void *)pmap_preboot_get_vpages(
1917 round_page(msgbufsize) / PAGE_SIZE);
1918
1919 /*
1920 * Pages were allocated during the secondary bootstrap for the
1921 * stacks for different CPU modes.
1922 * We must now set the r13 registers in the different CPU modes to
1923 * point to these stacks.
1924 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
1925 * of the stack memory.
1926 */
1927 set_stackptrs(0);
1928 mutex_init();
1929
1930 /* Establish static device mappings. */
1931 err_devmap = platform_devmap_init();
1932 devmap_bootstrap(0, NULL);
1933 vm_max_kernel_address = platform_lastaddr();
1934
1935 /*
1936 * Only after the SOC registers block is mapped we can perform device
1937 * tree fixups, as they may attempt to read parameters from hardware.
1938 */
1939 OF_interpret("perform-fixup", 0);
1940 platform_gpio_init();
1941 cninit();
1942
1943 debugf("initarm: console initialized\n");
1944 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp);
1945 debugf(" boothowto = 0x%08x\n", boothowto);
1946 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp);
1947 debugf(" lastaddr1: 0x%08x\n", lastaddr);
1948 print_kenv();
1949
1950 env = kern_getenv("kernelname");
1951 if (env != NULL)
1952 strlcpy(kernelname, env, sizeof(kernelname));
1953
1954 if (err_devmap != 0)
1955 printf("WARNING: could not fully configure devmap, error=%d\n",
1956 err_devmap);
1957
1958 platform_late_init();
1959
1960 /*
1961 * We must now clean the cache again....
1962 * Cleaning may be done by reading new data to displace any
1963 * dirty data in the cache. This will have happened in cpu_setttb()
1964 * but since we are boot strapping the addresses used for the read
1965 * may have just been remapped and thus the cache could be out
1966 * of sync. A re-clean after the switch will cure this.
1967 * After booting there are no gross relocations of the kernel thus
1968 * this problem will not occur after initarm().
1969 */
1970 /* Set stack for exception handlers */
1971 undefined_init();
1972 init_proc0(kernelstack);
1973 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
1974 enable_interrupts(PSR_A);
1975 pmap_bootstrap(0);
1976
1977 /* Exclude the kernel (and all the things we allocated which immediately
1978 * follow the kernel) from the VM allocation pool but not from crash
1979 * dumps. virtual_avail is a global variable which tracks the kva we've
1980 * "allocated" while setting up pmaps.
1981 *
1982 * Prepare the list of physical memory available to the vm subsystem.
1983 */
1984 arm_physmem_exclude_region(abp->abp_physaddr,
1985 pmap_preboot_get_pages(0) - abp->abp_physaddr, EXFLAG_NOALLOC);
1986 arm_physmem_init_kernel_globals();
1987
1988 init_param2(physmem);
1989 /* Init message buffer. */
1990 msgbufinit(msgbufp, msgbufsize);
1991 dbg_monitor_init();
1992 kdb_init();
1993 return ((void *)STACKALIGN(thread0.td_pcb));
1994
1995 }
1996
1997 #endif /* __ARM_ARCH < 6 */
1998 #endif /* FDT */
1999
2000 uint32_t (*arm_cpu_fill_vdso_timehands)(struct vdso_timehands *,
2001 struct timecounter *);
2002
2003 uint32_t
2004 cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th, struct timecounter *tc)
2005 {
2006
2007 return (arm_cpu_fill_vdso_timehands != NULL ?
2008 arm_cpu_fill_vdso_timehands(vdso_th, tc) : 0);
2009 }
Cache object: 581712da3260adae8e80f707cde450f6
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