1 /*-
2 * Copyright (c) 2003,2004 Marcel Moolenaar
3 * Copyright (c) 2000,2001 Doug Rabson
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/8.2/sys/ia64/ia64/machdep.c 206336 2010-04-07 02:24:41Z nwhitehorn $");
30
31 #include "opt_compat.h"
32 #include "opt_ddb.h"
33 #include "opt_kstack_pages.h"
34 #include "opt_msgbuf.h"
35 #include "opt_sched.h"
36
37 #include <sys/param.h>
38 #include <sys/proc.h>
39 #include <sys/systm.h>
40 #include <sys/bio.h>
41 #include <sys/buf.h>
42 #include <sys/bus.h>
43 #include <sys/cons.h>
44 #include <sys/cpu.h>
45 #include <sys/eventhandler.h>
46 #include <sys/exec.h>
47 #include <sys/imgact.h>
48 #include <sys/kdb.h>
49 #include <sys/kernel.h>
50 #include <sys/linker.h>
51 #include <sys/lock.h>
52 #include <sys/malloc.h>
53 #include <sys/mbuf.h>
54 #include <sys/msgbuf.h>
55 #include <sys/pcpu.h>
56 #include <sys/ptrace.h>
57 #include <sys/random.h>
58 #include <sys/reboot.h>
59 #include <sys/sched.h>
60 #include <sys/signalvar.h>
61 #include <sys/syscall.h>
62 #include <sys/sysctl.h>
63 #include <sys/sysproto.h>
64 #include <sys/ucontext.h>
65 #include <sys/uio.h>
66 #include <sys/uuid.h>
67 #include <sys/vmmeter.h>
68 #include <sys/vnode.h>
69
70 #include <ddb/ddb.h>
71
72 #include <net/netisr.h>
73
74 #include <vm/vm.h>
75 #include <vm/vm_extern.h>
76 #include <vm/vm_kern.h>
77 #include <vm/vm_page.h>
78 #include <vm/vm_map.h>
79 #include <vm/vm_object.h>
80 #include <vm/vm_pager.h>
81
82 #include <machine/bootinfo.h>
83 #include <machine/cpu.h>
84 #include <machine/efi.h>
85 #include <machine/elf.h>
86 #include <machine/fpu.h>
87 #include <machine/intr.h>
88 #include <machine/mca.h>
89 #include <machine/md_var.h>
90 #include <machine/mutex.h>
91 #include <machine/pal.h>
92 #include <machine/pcb.h>
93 #include <machine/reg.h>
94 #include <machine/sal.h>
95 #include <machine/sigframe.h>
96 #ifdef SMP
97 #include <machine/smp.h>
98 #endif
99 #include <machine/unwind.h>
100 #include <machine/vmparam.h>
101
102 SYSCTL_NODE(_hw, OID_AUTO, freq, CTLFLAG_RD, 0, "");
103 SYSCTL_NODE(_machdep, OID_AUTO, cpu, CTLFLAG_RD, 0, "");
104
105 static u_int bus_freq;
106 SYSCTL_UINT(_hw_freq, OID_AUTO, bus, CTLFLAG_RD, &bus_freq, 0,
107 "Bus clock frequency");
108
109 static u_int cpu_freq;
110 SYSCTL_UINT(_hw_freq, OID_AUTO, cpu, CTLFLAG_RD, &cpu_freq, 0,
111 "CPU clock frequency");
112
113 static u_int itc_freq;
114 SYSCTL_UINT(_hw_freq, OID_AUTO, itc, CTLFLAG_RD, &itc_freq, 0,
115 "ITC frequency");
116
117 int cold = 1;
118
119 u_int64_t pa_bootinfo;
120 struct bootinfo bootinfo;
121
122 struct pcpu pcpu0;
123
124 extern u_int64_t kernel_text[], _end[];
125
126 extern u_int64_t ia64_gateway_page[];
127 extern u_int64_t break_sigtramp[];
128 extern u_int64_t epc_sigtramp[];
129
130 struct fpswa_iface *fpswa_iface;
131
132 u_int64_t ia64_pal_base;
133 u_int64_t ia64_port_base;
134
135 u_int64_t ia64_lapic_addr = PAL_PIB_DEFAULT_ADDR;
136
137 struct ia64_pib *ia64_pib;
138
139 static int ia64_sync_icache_needed;
140
141 char machine[] = MACHINE;
142 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
143
144 static char cpu_model[64];
145 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, cpu_model, 0,
146 "The CPU model name");
147
148 static char cpu_family[64];
149 SYSCTL_STRING(_hw, OID_AUTO, family, CTLFLAG_RD, cpu_family, 0,
150 "The CPU family name");
151
152 #ifdef DDB
153 extern vm_offset_t ksym_start, ksym_end;
154 #endif
155
156
157 struct msgbuf *msgbufp = NULL;
158
159 /* Other subsystems (e.g., ACPI) can hook this later. */
160 void (*cpu_idle_hook)(void) = NULL;
161
162 long Maxmem = 0;
163 long realmem = 0;
164
165 #define PHYSMAP_SIZE (2 * VM_PHYSSEG_MAX)
166
167 vm_paddr_t phys_avail[PHYSMAP_SIZE + 2];
168
169 /* must be 2 less so 0 0 can signal end of chunks */
170 #define PHYS_AVAIL_ARRAY_END ((sizeof(phys_avail) / sizeof(vm_offset_t)) - 2)
171
172 struct kva_md_info kmi;
173
174 #define Mhz 1000000L
175 #define Ghz (1000L*Mhz)
176
177 static void
178 identifycpu(void)
179 {
180 char vendor[17];
181 char *family_name, *model_name;
182 u_int64_t features, tmp;
183 int number, revision, model, family, archrev;
184
185 /*
186 * Assumes little-endian.
187 */
188 *(u_int64_t *) &vendor[0] = ia64_get_cpuid(0);
189 *(u_int64_t *) &vendor[8] = ia64_get_cpuid(1);
190 vendor[16] = '\0';
191
192 tmp = ia64_get_cpuid(3);
193 number = (tmp >> 0) & 0xff;
194 revision = (tmp >> 8) & 0xff;
195 model = (tmp >> 16) & 0xff;
196 family = (tmp >> 24) & 0xff;
197 archrev = (tmp >> 32) & 0xff;
198
199 family_name = model_name = "unknown";
200 switch (family) {
201 case 0x07:
202 family_name = "Itanium";
203 model_name = "Merced";
204 break;
205 case 0x1f:
206 family_name = "Itanium 2";
207 switch (model) {
208 case 0x00:
209 model_name = "McKinley";
210 break;
211 case 0x01:
212 /*
213 * Deerfield is a low-voltage variant based on the
214 * Madison core. We need circumstantial evidence
215 * (i.e. the clock frequency) to identify those.
216 * Allow for roughly 1% error margin.
217 */
218 if (cpu_freq > 990 && cpu_freq < 1010)
219 model_name = "Deerfield";
220 else
221 model_name = "Madison";
222 break;
223 case 0x02:
224 model_name = "Madison II";
225 break;
226 }
227 break;
228 case 0x20:
229 ia64_sync_icache_needed = 1;
230
231 family_name = "Itanium 2";
232 switch (model) {
233 case 0x00:
234 model_name = "Montecito";
235 break;
236 }
237 break;
238 }
239 snprintf(cpu_family, sizeof(cpu_family), "%s", family_name);
240 snprintf(cpu_model, sizeof(cpu_model), "%s", model_name);
241
242 features = ia64_get_cpuid(4);
243
244 printf("CPU: %s (", model_name);
245 if (cpu_freq)
246 printf("%u Mhz ", cpu_freq);
247 printf("%s)\n", family_name);
248 printf(" Origin = \"%s\" Revision = %d\n", vendor, revision);
249 printf(" Features = 0x%b\n", (u_int32_t) features,
250 "\020"
251 "\001LB" /* long branch (brl) instruction. */
252 "\002SD" /* Spontaneous deferral. */
253 "\003AO" /* 16-byte atomic operations (ld, st, cmpxchg). */ );
254 }
255
256 static void
257 cpu_startup(void *dummy)
258 {
259 char nodename[16];
260 struct pcpu *pc;
261 struct pcpu_stats *pcs;
262
263 /*
264 * Good {morning,afternoon,evening,night}.
265 */
266 identifycpu();
267
268 #ifdef PERFMON
269 perfmon_init();
270 #endif
271 printf("real memory = %ld (%ld MB)\n", ia64_ptob(Maxmem),
272 ia64_ptob(Maxmem) / 1048576);
273 realmem = Maxmem;
274
275 /*
276 * Display any holes after the first chunk of extended memory.
277 */
278 if (bootverbose) {
279 int indx;
280
281 printf("Physical memory chunk(s):\n");
282 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
283 long size1 = phys_avail[indx + 1] - phys_avail[indx];
284
285 printf("0x%08lx - 0x%08lx, %ld bytes (%ld pages)\n",
286 phys_avail[indx], phys_avail[indx + 1] - 1, size1,
287 size1 >> PAGE_SHIFT);
288 }
289 }
290
291 vm_ksubmap_init(&kmi);
292
293 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
294 ptoa(cnt.v_free_count) / 1048576);
295
296 if (fpswa_iface == NULL)
297 printf("Warning: no FPSWA package supplied\n");
298 else
299 printf("FPSWA Revision = 0x%lx, Entry = %p\n",
300 (long)fpswa_iface->if_rev, (void *)fpswa_iface->if_fpswa);
301
302 /*
303 * Set up buffers, so they can be used to read disk labels.
304 */
305 bufinit();
306 vm_pager_bufferinit();
307
308 /*
309 * Traverse the MADT to discover IOSAPIC and Local SAPIC
310 * information.
311 */
312 ia64_probe_sapics();
313 ia64_pib = pmap_mapdev(ia64_lapic_addr, sizeof(*ia64_pib));
314
315 ia64_mca_init();
316
317 /*
318 * Create sysctl tree for per-CPU information.
319 */
320 SLIST_FOREACH(pc, &cpuhead, pc_allcpu) {
321 snprintf(nodename, sizeof(nodename), "%u", pc->pc_cpuid);
322 sysctl_ctx_init(&pc->pc_md.sysctl_ctx);
323 pc->pc_md.sysctl_tree = SYSCTL_ADD_NODE(&pc->pc_md.sysctl_ctx,
324 SYSCTL_STATIC_CHILDREN(_machdep_cpu), OID_AUTO, nodename,
325 CTLFLAG_RD, NULL, "");
326 if (pc->pc_md.sysctl_tree == NULL)
327 continue;
328
329 pcs = &pc->pc_md.stats;
330
331 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
332 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
333 "nasts", CTLFLAG_RD, &pcs->pcs_nasts,
334 "Number of IPI_AST interrupts");
335
336 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
337 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
338 "nclks", CTLFLAG_RD, &pcs->pcs_nclks,
339 "Number of clock interrupts");
340
341 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
342 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
343 "nextints", CTLFLAG_RD, &pcs->pcs_nextints,
344 "Number of ExtINT interrupts");
345
346 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
347 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
348 "nhighfps", CTLFLAG_RD, &pcs->pcs_nhighfps,
349 "Number of IPI_HIGH_FP interrupts");
350
351 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
352 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
353 "nhwints", CTLFLAG_RD, &pcs->pcs_nhwints,
354 "Number of hardware (device) interrupts");
355
356 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
357 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
358 "npreempts", CTLFLAG_RD, &pcs->pcs_npreempts,
359 "Number of IPI_PREEMPT interrupts");
360
361 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
362 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
363 "nrdvs", CTLFLAG_RD, &pcs->pcs_nrdvs,
364 "Number of IPI_RENDEZVOUS interrupts");
365
366 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
367 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
368 "nstops", CTLFLAG_RD, &pcs->pcs_nstops,
369 "Number of IPI_STOP interrupts");
370
371 SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
372 SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
373 "nstrays", CTLFLAG_RD, &pcs->pcs_nstrays,
374 "Number of stray interrupts");
375 }
376 }
377 SYSINIT(cpu_startup, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
378
379 void
380 cpu_flush_dcache(void *ptr, size_t len)
381 {
382 vm_offset_t lim, va;
383
384 va = (uintptr_t)ptr & ~31;
385 lim = (uintptr_t)ptr + len;
386 while (va < lim) {
387 ia64_fc(va);
388 va += 32;
389 }
390
391 ia64_srlz_d();
392 }
393
394 /* Get current clock frequency for the given cpu id. */
395 int
396 cpu_est_clockrate(int cpu_id, uint64_t *rate)
397 {
398
399 if (pcpu_find(cpu_id) == NULL || rate == NULL)
400 return (EINVAL);
401 *rate = (u_long)cpu_freq * 1000000ul;
402 return (0);
403 }
404
405 void
406 cpu_halt()
407 {
408
409 efi_reset_system();
410 }
411
412 void
413 cpu_idle(int busy)
414 {
415 struct ia64_pal_result res;
416
417 if (cpu_idle_hook != NULL)
418 (*cpu_idle_hook)();
419 else
420 res = ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0);
421 }
422
423 int
424 cpu_idle_wakeup(int cpu)
425 {
426
427 return (0);
428 }
429
430 void
431 cpu_reset()
432 {
433
434 efi_reset_system();
435 }
436
437 void
438 cpu_switch(struct thread *old, struct thread *new, struct mtx *mtx)
439 {
440 struct pcb *oldpcb, *newpcb;
441
442 oldpcb = old->td_pcb;
443 #ifdef COMPAT_FREEBSD32
444 ia32_savectx(oldpcb);
445 #endif
446 if (PCPU_GET(fpcurthread) == old)
447 old->td_frame->tf_special.psr |= IA64_PSR_DFH;
448 if (!savectx(oldpcb)) {
449 atomic_store_rel_ptr(&old->td_lock, mtx);
450
451 newpcb = new->td_pcb;
452 oldpcb->pcb_current_pmap =
453 pmap_switch(newpcb->pcb_current_pmap);
454
455 #if defined(SCHED_ULE) && defined(SMP)
456 while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock)
457 cpu_spinwait();
458 #endif
459
460 PCPU_SET(curthread, new);
461
462 #ifdef COMPAT_FREEBSD32
463 ia32_restorectx(newpcb);
464 #endif
465
466 if (PCPU_GET(fpcurthread) == new)
467 new->td_frame->tf_special.psr &= ~IA64_PSR_DFH;
468 restorectx(newpcb);
469 /* We should not get here. */
470 panic("cpu_switch: restorectx() returned");
471 /* NOTREACHED */
472 }
473 }
474
475 void
476 cpu_throw(struct thread *old __unused, struct thread *new)
477 {
478 struct pcb *newpcb;
479
480 newpcb = new->td_pcb;
481 (void)pmap_switch(newpcb->pcb_current_pmap);
482
483 #if defined(SCHED_ULE) && defined(SMP)
484 while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock)
485 cpu_spinwait();
486 #endif
487
488 PCPU_SET(curthread, new);
489
490 #ifdef COMPAT_FREEBSD32
491 ia32_restorectx(newpcb);
492 #endif
493
494 restorectx(newpcb);
495 /* We should not get here. */
496 panic("cpu_throw: restorectx() returned");
497 /* NOTREACHED */
498 }
499
500 void
501 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
502 {
503
504 /*
505 * Set pc_acpi_id to "uninitialized".
506 * See sys/dev/acpica/acpi_cpu.c
507 */
508 pcpu->pc_acpi_id = 0xffffffff;
509 }
510
511 void
512 spinlock_enter(void)
513 {
514 struct thread *td;
515
516 td = curthread;
517 if (td->td_md.md_spinlock_count == 0)
518 td->td_md.md_saved_intr = intr_disable();
519 td->td_md.md_spinlock_count++;
520 critical_enter();
521 }
522
523 void
524 spinlock_exit(void)
525 {
526 struct thread *td;
527
528 td = curthread;
529 critical_exit();
530 td->td_md.md_spinlock_count--;
531 if (td->td_md.md_spinlock_count == 0)
532 intr_restore(td->td_md.md_saved_intr);
533 }
534
535 void
536 map_vhpt(uintptr_t vhpt)
537 {
538 pt_entry_t pte;
539 uint64_t psr;
540
541 pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
542 PTE_PL_KERN | PTE_AR_RW;
543 pte |= vhpt & PTE_PPN_MASK;
544
545 __asm __volatile("ptr.d %0,%1" :: "r"(vhpt),
546 "r"(IA64_ID_PAGE_SHIFT<<2));
547
548 __asm __volatile("mov %0=psr" : "=r"(psr));
549 __asm __volatile("rsm psr.ic|psr.i");
550 ia64_srlz_i();
551 ia64_set_ifa(vhpt);
552 ia64_set_itir(IA64_ID_PAGE_SHIFT << 2);
553 ia64_srlz_d();
554 __asm __volatile("itr.d dtr[%0]=%1" :: "r"(2), "r"(pte));
555 __asm __volatile("mov psr.l=%0" :: "r" (psr));
556 ia64_srlz_i();
557 }
558
559 void
560 map_pal_code(void)
561 {
562 pt_entry_t pte;
563 uint64_t psr;
564
565 if (ia64_pal_base == 0)
566 return;
567
568 pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
569 PTE_PL_KERN | PTE_AR_RWX;
570 pte |= ia64_pal_base & PTE_PPN_MASK;
571
572 __asm __volatile("ptr.d %0,%1; ptr.i %0,%1" ::
573 "r"(IA64_PHYS_TO_RR7(ia64_pal_base)), "r"(IA64_ID_PAGE_SHIFT<<2));
574
575 __asm __volatile("mov %0=psr" : "=r"(psr));
576 __asm __volatile("rsm psr.ic|psr.i");
577 ia64_srlz_i();
578 ia64_set_ifa(IA64_PHYS_TO_RR7(ia64_pal_base));
579 ia64_set_itir(IA64_ID_PAGE_SHIFT << 2);
580 ia64_srlz_d();
581 __asm __volatile("itr.d dtr[%0]=%1" :: "r"(1), "r"(pte));
582 ia64_srlz_d();
583 __asm __volatile("itr.i itr[%0]=%1" :: "r"(1), "r"(pte));
584 __asm __volatile("mov psr.l=%0" :: "r" (psr));
585 ia64_srlz_i();
586 }
587
588 void
589 map_gateway_page(void)
590 {
591 pt_entry_t pte;
592 uint64_t psr;
593
594 pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
595 PTE_PL_KERN | PTE_AR_X_RX;
596 pte |= (uint64_t)ia64_gateway_page & PTE_PPN_MASK;
597
598 __asm __volatile("ptr.d %0,%1; ptr.i %0,%1" ::
599 "r"(VM_MAX_ADDRESS), "r"(PAGE_SHIFT << 2));
600
601 __asm __volatile("mov %0=psr" : "=r"(psr));
602 __asm __volatile("rsm psr.ic|psr.i");
603 ia64_srlz_i();
604 ia64_set_ifa(VM_MAX_ADDRESS);
605 ia64_set_itir(PAGE_SHIFT << 2);
606 ia64_srlz_d();
607 __asm __volatile("itr.d dtr[%0]=%1" :: "r"(3), "r"(pte));
608 ia64_srlz_d();
609 __asm __volatile("itr.i itr[%0]=%1" :: "r"(3), "r"(pte));
610 __asm __volatile("mov psr.l=%0" :: "r" (psr));
611 ia64_srlz_i();
612
613 /* Expose the mapping to userland in ar.k5 */
614 ia64_set_k5(VM_MAX_ADDRESS);
615 }
616
617 static u_int
618 freq_ratio(u_long base, u_long ratio)
619 {
620 u_long f;
621
622 f = (base * (ratio >> 32)) / (ratio & 0xfffffffful);
623 return ((f + 500000) / 1000000);
624 }
625
626 static void
627 calculate_frequencies(void)
628 {
629 struct ia64_sal_result sal;
630 struct ia64_pal_result pal;
631
632 sal = ia64_sal_entry(SAL_FREQ_BASE, 0, 0, 0, 0, 0, 0, 0);
633 pal = ia64_call_pal_static(PAL_FREQ_RATIOS, 0, 0, 0);
634
635 if (sal.sal_status == 0 && pal.pal_status == 0) {
636 if (bootverbose) {
637 printf("Platform clock frequency %ld Hz\n",
638 sal.sal_result[0]);
639 printf("Processor ratio %ld/%ld, Bus ratio %ld/%ld, "
640 "ITC ratio %ld/%ld\n",
641 pal.pal_result[0] >> 32,
642 pal.pal_result[0] & ((1L << 32) - 1),
643 pal.pal_result[1] >> 32,
644 pal.pal_result[1] & ((1L << 32) - 1),
645 pal.pal_result[2] >> 32,
646 pal.pal_result[2] & ((1L << 32) - 1));
647 }
648 cpu_freq = freq_ratio(sal.sal_result[0], pal.pal_result[0]);
649 bus_freq = freq_ratio(sal.sal_result[0], pal.pal_result[1]);
650 itc_freq = freq_ratio(sal.sal_result[0], pal.pal_result[2]);
651 }
652 }
653
654 struct ia64_init_return
655 ia64_init(void)
656 {
657 struct ia64_init_return ret;
658 int phys_avail_cnt;
659 vm_offset_t kernstart, kernend;
660 vm_offset_t kernstartpfn, kernendpfn, pfn0, pfn1;
661 char *p;
662 struct efi_md *md;
663 int metadata_missing;
664
665 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */
666
667 /*
668 * TODO: Disable interrupts, floating point etc.
669 * Maybe flush cache and tlb
670 */
671 ia64_set_fpsr(IA64_FPSR_DEFAULT);
672
673 /*
674 * TODO: Get critical system information (if possible, from the
675 * information provided by the boot program).
676 */
677
678 /*
679 * pa_bootinfo is the physical address of the bootinfo block as
680 * passed to us by the loader and set in locore.s.
681 */
682 bootinfo = *(struct bootinfo *)(IA64_PHYS_TO_RR7(pa_bootinfo));
683
684 if (bootinfo.bi_magic != BOOTINFO_MAGIC || bootinfo.bi_version != 1) {
685 bzero(&bootinfo, sizeof(bootinfo));
686 bootinfo.bi_kernend = (vm_offset_t) round_page(_end);
687 }
688
689 /*
690 * Look for the I/O ports first - we need them for console
691 * probing.
692 */
693 for (md = efi_md_first(); md != NULL; md = efi_md_next(md)) {
694 switch (md->md_type) {
695 case EFI_MD_TYPE_IOPORT:
696 ia64_port_base = (uintptr_t)pmap_mapdev(md->md_phys,
697 md->md_pages * EFI_PAGE_SIZE);
698 break;
699 case EFI_MD_TYPE_PALCODE:
700 ia64_pal_base = md->md_phys;
701 break;
702 }
703 }
704
705 metadata_missing = 0;
706 if (bootinfo.bi_modulep)
707 preload_metadata = (caddr_t)bootinfo.bi_modulep;
708 else
709 metadata_missing = 1;
710
711 if (envmode == 0 && bootinfo.bi_envp)
712 kern_envp = (caddr_t)bootinfo.bi_envp;
713 else
714 kern_envp = static_env;
715
716 /*
717 * Look at arguments passed to us and compute boothowto.
718 */
719 boothowto = bootinfo.bi_boothowto;
720
721 if (boothowto & RB_VERBOSE)
722 bootverbose = 1;
723
724 /*
725 * Find the beginning and end of the kernel.
726 */
727 kernstart = trunc_page(kernel_text);
728 #ifdef DDB
729 ksym_start = bootinfo.bi_symtab;
730 ksym_end = bootinfo.bi_esymtab;
731 kernend = (vm_offset_t)round_page(ksym_end);
732 #else
733 kernend = (vm_offset_t)round_page(_end);
734 #endif
735 /* But if the bootstrap tells us otherwise, believe it! */
736 if (bootinfo.bi_kernend)
737 kernend = round_page(bootinfo.bi_kernend);
738
739 /*
740 * Setup the PCPU data for the bootstrap processor. It is needed
741 * by printf(). Also, since printf() has critical sections, we
742 * need to initialize at least pc_curthread.
743 */
744 pcpup = &pcpu0;
745 ia64_set_k4((u_int64_t)pcpup);
746 pcpu_init(pcpup, 0, sizeof(pcpu0));
747 dpcpu_init((void *)kernend, 0);
748 kernend += DPCPU_SIZE;
749 PCPU_SET(curthread, &thread0);
750
751 /*
752 * Initialize the console before we print anything out.
753 */
754 cninit();
755
756 /* OUTPUT NOW ALLOWED */
757
758 if (ia64_pal_base != 0) {
759 ia64_pal_base &= ~IA64_ID_PAGE_MASK;
760 /*
761 * We use a TR to map the first 256M of memory - this might
762 * cover the palcode too.
763 */
764 if (ia64_pal_base == 0)
765 printf("PAL code mapped by the kernel's TR\n");
766 } else
767 printf("PAL code not found\n");
768
769 /*
770 * Wire things up so we can call the firmware.
771 */
772 map_pal_code();
773 efi_boot_minimal(bootinfo.bi_systab);
774 ia64_xiv_init();
775 ia64_sal_init();
776 calculate_frequencies();
777
778 if (metadata_missing)
779 printf("WARNING: loader(8) metadata is missing!\n");
780
781 /* Get FPSWA interface */
782 fpswa_iface = (bootinfo.bi_fpswa == 0) ? NULL :
783 (struct fpswa_iface *)IA64_PHYS_TO_RR7(bootinfo.bi_fpswa);
784
785 /* Init basic tunables, including hz */
786 init_param1();
787
788 p = getenv("kernelname");
789 if (p != NULL) {
790 strncpy(kernelname, p, sizeof(kernelname) - 1);
791 freeenv(p);
792 }
793
794 kernstartpfn = atop(IA64_RR_MASK(kernstart));
795 kernendpfn = atop(IA64_RR_MASK(kernend));
796
797 /*
798 * Size the memory regions and load phys_avail[] with the results.
799 */
800
801 /*
802 * Find out how much memory is available, by looking at
803 * the memory descriptors.
804 */
805
806 #ifdef DEBUG_MD
807 printf("Memory descriptor count: %d\n", mdcount);
808 #endif
809
810 phys_avail_cnt = 0;
811 for (md = efi_md_first(); md != NULL; md = efi_md_next(md)) {
812 #ifdef DEBUG_MD
813 printf("MD %p: type %d pa 0x%lx cnt 0x%lx\n", md,
814 md->md_type, md->md_phys, md->md_pages);
815 #endif
816
817 pfn0 = ia64_btop(round_page(md->md_phys));
818 pfn1 = ia64_btop(trunc_page(md->md_phys + md->md_pages * 4096));
819 if (pfn1 <= pfn0)
820 continue;
821
822 if (md->md_type != EFI_MD_TYPE_FREE)
823 continue;
824
825 /*
826 * We have a memory descriptor that describes conventional
827 * memory that is for general use. We must determine if the
828 * loader has put the kernel in this region.
829 */
830 physmem += (pfn1 - pfn0);
831 if (pfn0 <= kernendpfn && kernstartpfn <= pfn1) {
832 /*
833 * Must compute the location of the kernel
834 * within the segment.
835 */
836 #ifdef DEBUG_MD
837 printf("Descriptor %p contains kernel\n", mp);
838 #endif
839 if (pfn0 < kernstartpfn) {
840 /*
841 * There is a chunk before the kernel.
842 */
843 #ifdef DEBUG_MD
844 printf("Loading chunk before kernel: "
845 "0x%lx / 0x%lx\n", pfn0, kernstartpfn);
846 #endif
847 phys_avail[phys_avail_cnt] = ia64_ptob(pfn0);
848 phys_avail[phys_avail_cnt+1] = ia64_ptob(kernstartpfn);
849 phys_avail_cnt += 2;
850 }
851 if (kernendpfn < pfn1) {
852 /*
853 * There is a chunk after the kernel.
854 */
855 #ifdef DEBUG_MD
856 printf("Loading chunk after kernel: "
857 "0x%lx / 0x%lx\n", kernendpfn, pfn1);
858 #endif
859 phys_avail[phys_avail_cnt] = ia64_ptob(kernendpfn);
860 phys_avail[phys_avail_cnt+1] = ia64_ptob(pfn1);
861 phys_avail_cnt += 2;
862 }
863 } else {
864 /*
865 * Just load this cluster as one chunk.
866 */
867 #ifdef DEBUG_MD
868 printf("Loading descriptor %d: 0x%lx / 0x%lx\n", i,
869 pfn0, pfn1);
870 #endif
871 phys_avail[phys_avail_cnt] = ia64_ptob(pfn0);
872 phys_avail[phys_avail_cnt+1] = ia64_ptob(pfn1);
873 phys_avail_cnt += 2;
874
875 }
876 }
877 phys_avail[phys_avail_cnt] = 0;
878
879 Maxmem = physmem;
880 init_param2(physmem);
881
882 /*
883 * Initialize error message buffer (at end of core).
884 */
885 msgbufp = (struct msgbuf *)pmap_steal_memory(MSGBUF_SIZE);
886 msgbufinit(msgbufp, MSGBUF_SIZE);
887
888 proc_linkup0(&proc0, &thread0);
889 /*
890 * Init mapping for kernel stack for proc 0
891 */
892 thread0.td_kstack = pmap_steal_memory(KSTACK_PAGES * PAGE_SIZE);
893 thread0.td_kstack_pages = KSTACK_PAGES;
894
895 mutex_init();
896
897 /*
898 * Initialize the rest of proc 0's PCB.
899 *
900 * Set the kernel sp, reserving space for an (empty) trapframe,
901 * and make proc0's trapframe pointer point to it for sanity.
902 * Initialise proc0's backing store to start after u area.
903 */
904 cpu_thread_alloc(&thread0);
905 thread0.td_frame->tf_flags = FRAME_SYSCALL;
906 thread0.td_pcb->pcb_special.sp =
907 (u_int64_t)thread0.td_frame - 16;
908 thread0.td_pcb->pcb_special.bspstore = thread0.td_kstack;
909
910 /*
911 * Initialize the virtual memory system.
912 */
913 pmap_bootstrap();
914
915 /*
916 * Initialize debuggers, and break into them if appropriate.
917 */
918 kdb_init();
919
920 #ifdef KDB
921 if (boothowto & RB_KDB)
922 kdb_enter(KDB_WHY_BOOTFLAGS,
923 "Boot flags requested debugger\n");
924 #endif
925
926 ia64_set_tpr(0);
927 ia64_srlz_d();
928
929 ret.bspstore = thread0.td_pcb->pcb_special.bspstore;
930 ret.sp = thread0.td_pcb->pcb_special.sp;
931 return (ret);
932 }
933
934 uint64_t
935 ia64_get_hcdp(void)
936 {
937
938 return (bootinfo.bi_hcdp);
939 }
940
941 void
942 bzero(void *buf, size_t len)
943 {
944 caddr_t p = buf;
945
946 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
947 *p++ = 0;
948 len--;
949 }
950 while (len >= sizeof(u_long) * 8) {
951 *(u_long*) p = 0;
952 *((u_long*) p + 1) = 0;
953 *((u_long*) p + 2) = 0;
954 *((u_long*) p + 3) = 0;
955 len -= sizeof(u_long) * 8;
956 *((u_long*) p + 4) = 0;
957 *((u_long*) p + 5) = 0;
958 *((u_long*) p + 6) = 0;
959 *((u_long*) p + 7) = 0;
960 p += sizeof(u_long) * 8;
961 }
962 while (len >= sizeof(u_long)) {
963 *(u_long*) p = 0;
964 len -= sizeof(u_long);
965 p += sizeof(u_long);
966 }
967 while (len) {
968 *p++ = 0;
969 len--;
970 }
971 }
972
973 u_int
974 ia64_itc_freq(void)
975 {
976
977 return (itc_freq);
978 }
979
980 void
981 DELAY(int n)
982 {
983 u_int64_t start, end, now;
984
985 sched_pin();
986
987 start = ia64_get_itc();
988 end = start + itc_freq * n;
989 /* printf("DELAY from 0x%lx to 0x%lx\n", start, end); */
990 do {
991 now = ia64_get_itc();
992 } while (now < end || (now > start && end < start));
993
994 sched_unpin();
995 }
996
997 /*
998 * Send an interrupt (signal) to a process.
999 */
1000 void
1001 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
1002 {
1003 struct proc *p;
1004 struct thread *td;
1005 struct trapframe *tf;
1006 struct sigacts *psp;
1007 struct sigframe sf, *sfp;
1008 u_int64_t sbs, sp;
1009 int oonstack;
1010 int sig;
1011 u_long code;
1012
1013 td = curthread;
1014 p = td->td_proc;
1015 PROC_LOCK_ASSERT(p, MA_OWNED);
1016 sig = ksi->ksi_signo;
1017 code = ksi->ksi_code;
1018 psp = p->p_sigacts;
1019 mtx_assert(&psp->ps_mtx, MA_OWNED);
1020 tf = td->td_frame;
1021 sp = tf->tf_special.sp;
1022 oonstack = sigonstack(sp);
1023 sbs = 0;
1024
1025 /* save user context */
1026 bzero(&sf, sizeof(struct sigframe));
1027 sf.sf_uc.uc_sigmask = *mask;
1028 sf.sf_uc.uc_stack = td->td_sigstk;
1029 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
1030 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
1031
1032 /*
1033 * Allocate and validate space for the signal handler
1034 * context. Note that if the stack is in P0 space, the
1035 * call to grow() is a nop, and the useracc() check
1036 * will fail if the process has not already allocated
1037 * the space with a `brk'.
1038 */
1039 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
1040 SIGISMEMBER(psp->ps_sigonstack, sig)) {
1041 sbs = (u_int64_t)td->td_sigstk.ss_sp;
1042 sbs = (sbs + 15) & ~15;
1043 sfp = (struct sigframe *)(sbs + td->td_sigstk.ss_size);
1044 #if defined(COMPAT_43)
1045 td->td_sigstk.ss_flags |= SS_ONSTACK;
1046 #endif
1047 } else
1048 sfp = (struct sigframe *)sp;
1049 sfp = (struct sigframe *)((u_int64_t)(sfp - 1) & ~15);
1050
1051 /* Fill in the siginfo structure for POSIX handlers. */
1052 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
1053 sf.sf_si = ksi->ksi_info;
1054 sf.sf_si.si_signo = sig;
1055 /*
1056 * XXX this shouldn't be here after code in trap.c
1057 * is fixed
1058 */
1059 sf.sf_si.si_addr = (void*)tf->tf_special.ifa;
1060 code = (u_int64_t)&sfp->sf_si;
1061 }
1062
1063 mtx_unlock(&psp->ps_mtx);
1064 PROC_UNLOCK(p);
1065
1066 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
1067
1068 /* Copy the frame out to userland. */
1069 if (copyout(&sf, sfp, sizeof(sf)) != 0) {
1070 /*
1071 * Process has trashed its stack; give it an illegal
1072 * instruction to halt it in its tracks.
1073 */
1074 PROC_LOCK(p);
1075 sigexit(td, SIGILL);
1076 return;
1077 }
1078
1079 if ((tf->tf_flags & FRAME_SYSCALL) == 0) {
1080 tf->tf_special.psr &= ~IA64_PSR_RI;
1081 tf->tf_special.iip = ia64_get_k5() +
1082 ((uint64_t)break_sigtramp - (uint64_t)ia64_gateway_page);
1083 } else
1084 tf->tf_special.iip = ia64_get_k5() +
1085 ((uint64_t)epc_sigtramp - (uint64_t)ia64_gateway_page);
1086
1087 /*
1088 * Setup the trapframe to return to the signal trampoline. We pass
1089 * information to the trampoline in the following registers:
1090 *
1091 * gp new backing store or NULL
1092 * r8 signal number
1093 * r9 signal code or siginfo pointer
1094 * r10 signal handler (function descriptor)
1095 */
1096 tf->tf_special.sp = (u_int64_t)sfp - 16;
1097 tf->tf_special.gp = sbs;
1098 tf->tf_special.bspstore = sf.sf_uc.uc_mcontext.mc_special.bspstore;
1099 tf->tf_special.ndirty = 0;
1100 tf->tf_special.rnat = sf.sf_uc.uc_mcontext.mc_special.rnat;
1101 tf->tf_scratch.gr8 = sig;
1102 tf->tf_scratch.gr9 = code;
1103 tf->tf_scratch.gr10 = (u_int64_t)catcher;
1104
1105 PROC_LOCK(p);
1106 mtx_lock(&psp->ps_mtx);
1107 }
1108
1109 /*
1110 * System call to cleanup state after a signal
1111 * has been taken. Reset signal mask and
1112 * stack state from context left by sendsig (above).
1113 * Return to previous pc and psl as specified by
1114 * context left by sendsig. Check carefully to
1115 * make sure that the user has not modified the
1116 * state to gain improper privileges.
1117 *
1118 * MPSAFE
1119 */
1120 int
1121 sigreturn(struct thread *td,
1122 struct sigreturn_args /* {
1123 ucontext_t *sigcntxp;
1124 } */ *uap)
1125 {
1126 ucontext_t uc;
1127 struct trapframe *tf;
1128 struct pcb *pcb;
1129
1130 tf = td->td_frame;
1131 pcb = td->td_pcb;
1132
1133 /*
1134 * Fetch the entire context structure at once for speed.
1135 * We don't use a normal argument to simplify RSE handling.
1136 */
1137 if (copyin(uap->sigcntxp, (caddr_t)&uc, sizeof(uc)))
1138 return (EFAULT);
1139
1140 set_mcontext(td, &uc.uc_mcontext);
1141
1142 #if defined(COMPAT_43)
1143 if (sigonstack(tf->tf_special.sp))
1144 td->td_sigstk.ss_flags |= SS_ONSTACK;
1145 else
1146 td->td_sigstk.ss_flags &= ~SS_ONSTACK;
1147 #endif
1148 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
1149
1150 return (EJUSTRETURN);
1151 }
1152
1153 #ifdef COMPAT_FREEBSD4
1154 int
1155 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
1156 {
1157
1158 return sigreturn(td, (struct sigreturn_args *)uap);
1159 }
1160 #endif
1161
1162 /*
1163 * Construct a PCB from a trapframe. This is called from kdb_trap() where
1164 * we want to start a backtrace from the function that caused us to enter
1165 * the debugger. We have the context in the trapframe, but base the trace
1166 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
1167 * enough for a backtrace.
1168 */
1169 void
1170 makectx(struct trapframe *tf, struct pcb *pcb)
1171 {
1172
1173 pcb->pcb_special = tf->tf_special;
1174 pcb->pcb_special.__spare = ~0UL; /* XXX see unwind.c */
1175 save_callee_saved(&pcb->pcb_preserved);
1176 save_callee_saved_fp(&pcb->pcb_preserved_fp);
1177 }
1178
1179 int
1180 ia64_flush_dirty(struct thread *td, struct _special *r)
1181 {
1182 struct iovec iov;
1183 struct uio uio;
1184 uint64_t bspst, kstk, rnat;
1185 int error, locked;
1186
1187 if (r->ndirty == 0)
1188 return (0);
1189
1190 kstk = td->td_kstack + (r->bspstore & 0x1ffUL);
1191 if (td == curthread) {
1192 __asm __volatile("mov ar.rsc=0;;");
1193 __asm __volatile("mov %0=ar.bspstore" : "=r"(bspst));
1194 /* Make sure we have all the user registers written out. */
1195 if (bspst - kstk < r->ndirty) {
1196 __asm __volatile("flushrs;;");
1197 __asm __volatile("mov %0=ar.bspstore" : "=r"(bspst));
1198 }
1199 __asm __volatile("mov %0=ar.rnat;;" : "=r"(rnat));
1200 __asm __volatile("mov ar.rsc=3");
1201 error = copyout((void*)kstk, (void*)r->bspstore, r->ndirty);
1202 kstk += r->ndirty;
1203 r->rnat = (bspst > kstk && (bspst & 0x1ffL) < (kstk & 0x1ffL))
1204 ? *(uint64_t*)(kstk | 0x1f8L) : rnat;
1205 } else {
1206 locked = PROC_LOCKED(td->td_proc);
1207 if (!locked)
1208 PHOLD(td->td_proc);
1209 iov.iov_base = (void*)(uintptr_t)kstk;
1210 iov.iov_len = r->ndirty;
1211 uio.uio_iov = &iov;
1212 uio.uio_iovcnt = 1;
1213 uio.uio_offset = r->bspstore;
1214 uio.uio_resid = r->ndirty;
1215 uio.uio_segflg = UIO_SYSSPACE;
1216 uio.uio_rw = UIO_WRITE;
1217 uio.uio_td = td;
1218 error = proc_rwmem(td->td_proc, &uio);
1219 /*
1220 * XXX proc_rwmem() doesn't currently return ENOSPC,
1221 * so I think it can bogusly return 0. Neither do
1222 * we allow short writes.
1223 */
1224 if (uio.uio_resid != 0 && error == 0)
1225 error = ENOSPC;
1226 if (!locked)
1227 PRELE(td->td_proc);
1228 }
1229
1230 r->bspstore += r->ndirty;
1231 r->ndirty = 0;
1232 return (error);
1233 }
1234
1235 int
1236 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
1237 {
1238 struct trapframe *tf;
1239 int error;
1240
1241 tf = td->td_frame;
1242 bzero(mc, sizeof(*mc));
1243 mc->mc_special = tf->tf_special;
1244 error = ia64_flush_dirty(td, &mc->mc_special);
1245 if (tf->tf_flags & FRAME_SYSCALL) {
1246 mc->mc_flags |= _MC_FLAGS_SYSCALL_CONTEXT;
1247 mc->mc_scratch = tf->tf_scratch;
1248 if (flags & GET_MC_CLEAR_RET) {
1249 mc->mc_scratch.gr8 = 0;
1250 mc->mc_scratch.gr9 = 0;
1251 mc->mc_scratch.gr10 = 0;
1252 mc->mc_scratch.gr11 = 0;
1253 }
1254 } else {
1255 mc->mc_flags |= _MC_FLAGS_ASYNC_CONTEXT;
1256 mc->mc_scratch = tf->tf_scratch;
1257 mc->mc_scratch_fp = tf->tf_scratch_fp;
1258 /*
1259 * XXX If the thread never used the high FP registers, we
1260 * probably shouldn't waste time saving them.
1261 */
1262 ia64_highfp_save(td);
1263 mc->mc_flags |= _MC_FLAGS_HIGHFP_VALID;
1264 mc->mc_high_fp = td->td_pcb->pcb_high_fp;
1265 }
1266 save_callee_saved(&mc->mc_preserved);
1267 save_callee_saved_fp(&mc->mc_preserved_fp);
1268 return (error);
1269 }
1270
1271 int
1272 set_mcontext(struct thread *td, const mcontext_t *mc)
1273 {
1274 struct _special s;
1275 struct trapframe *tf;
1276 uint64_t psrmask;
1277
1278 tf = td->td_frame;
1279
1280 KASSERT((tf->tf_special.ndirty & ~PAGE_MASK) == 0,
1281 ("Whoa there! We have more than 8KB of dirty registers!"));
1282
1283 s = mc->mc_special;
1284 /*
1285 * Only copy the user mask and the restart instruction bit from
1286 * the new context.
1287 */
1288 psrmask = IA64_PSR_BE | IA64_PSR_UP | IA64_PSR_AC | IA64_PSR_MFL |
1289 IA64_PSR_MFH | IA64_PSR_RI;
1290 s.psr = (tf->tf_special.psr & ~psrmask) | (s.psr & psrmask);
1291 /* We don't have any dirty registers of the new context. */
1292 s.ndirty = 0;
1293 if (mc->mc_flags & _MC_FLAGS_ASYNC_CONTEXT) {
1294 /*
1295 * We can get an async context passed to us while we
1296 * entered the kernel through a syscall: sigreturn(2)
1297 * takes contexts that could previously be the result of
1298 * a trap or interrupt.
1299 * Hence, we cannot assert that the trapframe is not
1300 * a syscall frame, but we can assert that it's at
1301 * least an expected syscall.
1302 */
1303 if (tf->tf_flags & FRAME_SYSCALL) {
1304 KASSERT(tf->tf_scratch.gr15 == SYS_sigreturn, ("foo"));
1305 tf->tf_flags &= ~FRAME_SYSCALL;
1306 }
1307 tf->tf_scratch = mc->mc_scratch;
1308 tf->tf_scratch_fp = mc->mc_scratch_fp;
1309 if (mc->mc_flags & _MC_FLAGS_HIGHFP_VALID)
1310 td->td_pcb->pcb_high_fp = mc->mc_high_fp;
1311 } else {
1312 KASSERT((tf->tf_flags & FRAME_SYSCALL) != 0, ("foo"));
1313 if ((mc->mc_flags & _MC_FLAGS_SYSCALL_CONTEXT) == 0) {
1314 s.cfm = tf->tf_special.cfm;
1315 s.iip = tf->tf_special.iip;
1316 tf->tf_scratch.gr15 = 0; /* Clear syscall nr. */
1317 } else
1318 tf->tf_scratch = mc->mc_scratch;
1319 }
1320 tf->tf_special = s;
1321 restore_callee_saved(&mc->mc_preserved);
1322 restore_callee_saved_fp(&mc->mc_preserved_fp);
1323
1324 return (0);
1325 }
1326
1327 /*
1328 * Clear registers on exec.
1329 */
1330 void
1331 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
1332 {
1333 struct trapframe *tf;
1334 uint64_t *ksttop, *kst;
1335
1336 tf = td->td_frame;
1337 ksttop = (uint64_t*)(td->td_kstack + tf->tf_special.ndirty +
1338 (tf->tf_special.bspstore & 0x1ffUL));
1339
1340 /*
1341 * We can ignore up to 8KB of dirty registers by masking off the
1342 * lower 13 bits in exception_restore() or epc_syscall(). This
1343 * should be enough for a couple of years, but if there are more
1344 * than 8KB of dirty registers, we lose track of the bottom of
1345 * the kernel stack. The solution is to copy the active part of
1346 * the kernel stack down 1 page (or 2, but not more than that)
1347 * so that we always have less than 8KB of dirty registers.
1348 */
1349 KASSERT((tf->tf_special.ndirty & ~PAGE_MASK) == 0,
1350 ("Whoa there! We have more than 8KB of dirty registers!"));
1351
1352 bzero(&tf->tf_special, sizeof(tf->tf_special));
1353 if ((tf->tf_flags & FRAME_SYSCALL) == 0) { /* break syscalls. */
1354 bzero(&tf->tf_scratch, sizeof(tf->tf_scratch));
1355 bzero(&tf->tf_scratch_fp, sizeof(tf->tf_scratch_fp));
1356 tf->tf_special.cfm = (1UL<<63) | (3UL<<7) | 3UL;
1357 tf->tf_special.bspstore = IA64_BACKINGSTORE;
1358 /*
1359 * Copy the arguments onto the kernel register stack so that
1360 * they get loaded by the loadrs instruction. Skip over the
1361 * NaT collection points.
1362 */
1363 kst = ksttop - 1;
1364 if (((uintptr_t)kst & 0x1ff) == 0x1f8)
1365 *kst-- = 0;
1366 *kst-- = 0;
1367 if (((uintptr_t)kst & 0x1ff) == 0x1f8)
1368 *kst-- = 0;
1369 *kst-- = ps_strings;
1370 if (((uintptr_t)kst & 0x1ff) == 0x1f8)
1371 *kst-- = 0;
1372 *kst = stack;
1373 tf->tf_special.ndirty = (ksttop - kst) << 3;
1374 } else { /* epc syscalls (default). */
1375 tf->tf_special.cfm = (3UL<<62) | (3UL<<7) | 3UL;
1376 tf->tf_special.bspstore = IA64_BACKINGSTORE + 24;
1377 /*
1378 * Write values for out0, out1 and out2 to the user's backing
1379 * store and arrange for them to be restored into the user's
1380 * initial register frame.
1381 * Assumes that (bspstore & 0x1f8) < 0x1e0.
1382 */
1383 suword((caddr_t)tf->tf_special.bspstore - 24, stack);
1384 suword((caddr_t)tf->tf_special.bspstore - 16, ps_strings);
1385 suword((caddr_t)tf->tf_special.bspstore - 8, 0);
1386 }
1387
1388 tf->tf_special.iip = entry;
1389 tf->tf_special.sp = (stack & ~15) - 16;
1390 tf->tf_special.rsc = 0xf;
1391 tf->tf_special.fpsr = IA64_FPSR_DEFAULT;
1392 tf->tf_special.psr = IA64_PSR_IC | IA64_PSR_I | IA64_PSR_IT |
1393 IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_DFH | IA64_PSR_BN |
1394 IA64_PSR_CPL_USER;
1395 }
1396
1397 int
1398 ptrace_set_pc(struct thread *td, unsigned long addr)
1399 {
1400 uint64_t slot;
1401
1402 switch (addr & 0xFUL) {
1403 case 0:
1404 slot = IA64_PSR_RI_0;
1405 break;
1406 case 1:
1407 /* XXX we need to deal with MLX bundles here */
1408 slot = IA64_PSR_RI_1;
1409 break;
1410 case 2:
1411 slot = IA64_PSR_RI_2;
1412 break;
1413 default:
1414 return (EINVAL);
1415 }
1416
1417 td->td_frame->tf_special.iip = addr & ~0x0FULL;
1418 td->td_frame->tf_special.psr =
1419 (td->td_frame->tf_special.psr & ~IA64_PSR_RI) | slot;
1420 return (0);
1421 }
1422
1423 int
1424 ptrace_single_step(struct thread *td)
1425 {
1426 struct trapframe *tf;
1427
1428 /*
1429 * There's no way to set single stepping when we're leaving the
1430 * kernel through the EPC syscall path. The way we solve this is
1431 * by enabling the lower-privilege trap so that we re-enter the
1432 * kernel as soon as the privilege level changes. See trap.c for
1433 * how we proceed from there.
1434 */
1435 tf = td->td_frame;
1436 if (tf->tf_flags & FRAME_SYSCALL)
1437 tf->tf_special.psr |= IA64_PSR_LP;
1438 else
1439 tf->tf_special.psr |= IA64_PSR_SS;
1440 return (0);
1441 }
1442
1443 int
1444 ptrace_clear_single_step(struct thread *td)
1445 {
1446 struct trapframe *tf;
1447
1448 /*
1449 * Clear any and all status bits we may use to implement single
1450 * stepping.
1451 */
1452 tf = td->td_frame;
1453 tf->tf_special.psr &= ~IA64_PSR_SS;
1454 tf->tf_special.psr &= ~IA64_PSR_LP;
1455 tf->tf_special.psr &= ~IA64_PSR_TB;
1456 return (0);
1457 }
1458
1459 int
1460 fill_regs(struct thread *td, struct reg *regs)
1461 {
1462 struct trapframe *tf;
1463
1464 tf = td->td_frame;
1465 regs->r_special = tf->tf_special;
1466 regs->r_scratch = tf->tf_scratch;
1467 save_callee_saved(®s->r_preserved);
1468 return (0);
1469 }
1470
1471 int
1472 set_regs(struct thread *td, struct reg *regs)
1473 {
1474 struct trapframe *tf;
1475 int error;
1476
1477 tf = td->td_frame;
1478 error = ia64_flush_dirty(td, &tf->tf_special);
1479 if (!error) {
1480 tf->tf_special = regs->r_special;
1481 tf->tf_special.bspstore += tf->tf_special.ndirty;
1482 tf->tf_special.ndirty = 0;
1483 tf->tf_scratch = regs->r_scratch;
1484 restore_callee_saved(®s->r_preserved);
1485 }
1486 return (error);
1487 }
1488
1489 int
1490 fill_dbregs(struct thread *td, struct dbreg *dbregs)
1491 {
1492
1493 return (ENOSYS);
1494 }
1495
1496 int
1497 set_dbregs(struct thread *td, struct dbreg *dbregs)
1498 {
1499
1500 return (ENOSYS);
1501 }
1502
1503 int
1504 fill_fpregs(struct thread *td, struct fpreg *fpregs)
1505 {
1506 struct trapframe *frame = td->td_frame;
1507 struct pcb *pcb = td->td_pcb;
1508
1509 /* Save the high FP registers. */
1510 ia64_highfp_save(td);
1511
1512 fpregs->fpr_scratch = frame->tf_scratch_fp;
1513 save_callee_saved_fp(&fpregs->fpr_preserved);
1514 fpregs->fpr_high = pcb->pcb_high_fp;
1515 return (0);
1516 }
1517
1518 int
1519 set_fpregs(struct thread *td, struct fpreg *fpregs)
1520 {
1521 struct trapframe *frame = td->td_frame;
1522 struct pcb *pcb = td->td_pcb;
1523
1524 /* Throw away the high FP registers (should be redundant). */
1525 ia64_highfp_drop(td);
1526
1527 frame->tf_scratch_fp = fpregs->fpr_scratch;
1528 restore_callee_saved_fp(&fpregs->fpr_preserved);
1529 pcb->pcb_high_fp = fpregs->fpr_high;
1530 return (0);
1531 }
1532
1533 void
1534 ia64_sync_icache(vm_offset_t va, vm_offset_t sz)
1535 {
1536 vm_offset_t lim;
1537
1538 if (!ia64_sync_icache_needed)
1539 return;
1540
1541 lim = va + sz;
1542 while (va < lim) {
1543 ia64_fc_i(va);
1544 va += 32; /* XXX */
1545 }
1546
1547 ia64_sync_i();
1548 ia64_srlz_i();
1549 }
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