1 /*-
2 * Copyright (c) 1982, 1986 The Regents of the University of California.
3 * Copyright (c) 1989, 1990 William Jolitz
4 * Copyright (c) 1994 John Dyson
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
9 * Science Department, and William Jolitz.
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 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
36 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
37 * from: src/sys/i386/i386/vm_machdep.c,v 1.132.2.2 2000/08/26 04:19:26 yokota
38 * JNPR: vm_machdep.c,v 1.8.2.2 2007/08/16 15:59:17 girish
39 */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43
44 #include "opt_compat.h"
45 #include "opt_ddb.h"
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/malloc.h>
50 #include <sys/proc.h>
51 #include <sys/syscall.h>
52 #include <sys/sysent.h>
53 #include <sys/buf.h>
54 #include <sys/vnode.h>
55 #include <sys/vmmeter.h>
56 #include <sys/kernel.h>
57 #include <sys/sysctl.h>
58 #include <sys/unistd.h>
59
60 #include <machine/cache.h>
61 #include <machine/clock.h>
62 #include <machine/cpu.h>
63 #include <machine/md_var.h>
64 #include <machine/pcb.h>
65
66 #include <vm/vm.h>
67 #include <vm/vm_extern.h>
68 #include <vm/pmap.h>
69 #include <vm/vm_kern.h>
70 #include <vm/vm_map.h>
71 #include <vm/vm_page.h>
72 #include <vm/vm_pageout.h>
73 #include <vm/vm_param.h>
74 #include <vm/uma.h>
75 #include <vm/uma_int.h>
76
77 #include <sys/user.h>
78 #include <sys/mbuf.h>
79 #ifndef __mips_n64
80 #include <sys/sf_buf.h>
81 #endif
82
83 /* Duplicated from asm.h */
84 #if defined(__mips_o32)
85 #define SZREG 4
86 #else
87 #define SZREG 8
88 #endif
89 #if defined(__mips_o32) || defined(__mips_o64)
90 #define CALLFRAME_SIZ (SZREG * (4 + 2))
91 #elif defined(__mips_n32) || defined(__mips_n64)
92 #define CALLFRAME_SIZ (SZREG * 4)
93 #endif
94
95 #ifndef __mips_n64
96
97 #ifndef NSFBUFS
98 #define NSFBUFS (512 + maxusers * 16)
99 #endif
100
101 static int nsfbufs;
102 static int nsfbufspeak;
103 static int nsfbufsused;
104
105 SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufs, CTLFLAG_RDTUN, &nsfbufs, 0,
106 "Maximum number of sendfile(2) sf_bufs available");
107 SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufspeak, CTLFLAG_RD, &nsfbufspeak, 0,
108 "Number of sendfile(2) sf_bufs at peak usage");
109 SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufsused, CTLFLAG_RD, &nsfbufsused, 0,
110 "Number of sendfile(2) sf_bufs in use");
111
112 static void sf_buf_init(void *arg);
113 SYSINIT(sock_sf, SI_SUB_MBUF, SI_ORDER_ANY, sf_buf_init, NULL);
114
115 /*
116 * Expanded sf_freelist head. Really an SLIST_HEAD() in disguise, with the
117 * sf_freelist head with the sf_lock mutex.
118 */
119 static struct {
120 SLIST_HEAD(, sf_buf) sf_head;
121 struct mtx sf_lock;
122 } sf_freelist;
123
124 static u_int sf_buf_alloc_want;
125 #endif /* !__mips_n64 */
126
127 /*
128 * Finish a fork operation, with process p2 nearly set up.
129 * Copy and update the pcb, set up the stack so that the child
130 * ready to run and return to user mode.
131 */
132 void
cpu_fork(register struct thread * td1,register struct proc * p2,struct thread * td2,int flags)133 cpu_fork(register struct thread *td1,register struct proc *p2,
134 struct thread *td2,int flags)
135 {
136 register struct proc *p1;
137 struct pcb *pcb2;
138
139 p1 = td1->td_proc;
140 if ((flags & RFPROC) == 0)
141 return;
142 /* It is assumed that the vm_thread_alloc called
143 * cpu_thread_alloc() before cpu_fork is called.
144 */
145
146 /* Point the pcb to the top of the stack */
147 pcb2 = td2->td_pcb;
148
149 /* Copy p1's pcb, note that in this case
150 * our pcb also includes the td_frame being copied
151 * too. The older mips2 code did an additional copy
152 * of the td_frame, for us that's not needed any
153 * longer (this copy does them both)
154 */
155 bcopy(td1->td_pcb, pcb2, sizeof(*pcb2));
156
157 /* Point mdproc and then copy over td1's contents
158 * md_proc is empty for MIPS
159 */
160 td2->td_md.md_flags = td1->td_md.md_flags & MDTD_FPUSED;
161
162 /*
163 * Set up return-value registers as fork() libc stub expects.
164 */
165 td2->td_frame->v0 = 0;
166 td2->td_frame->v1 = 1;
167 td2->td_frame->a3 = 0;
168
169 if (td1 == PCPU_GET(fpcurthread))
170 MipsSaveCurFPState(td1);
171
172 pcb2->pcb_context[PCB_REG_RA] = (register_t)(intptr_t)fork_trampoline;
173 /* Make sp 64-bit aligned */
174 pcb2->pcb_context[PCB_REG_SP] = (register_t)(((vm_offset_t)td2->td_pcb &
175 ~(sizeof(__int64_t) - 1)) - CALLFRAME_SIZ);
176 pcb2->pcb_context[PCB_REG_S0] = (register_t)(intptr_t)fork_return;
177 pcb2->pcb_context[PCB_REG_S1] = (register_t)(intptr_t)td2;
178 pcb2->pcb_context[PCB_REG_S2] = (register_t)(intptr_t)td2->td_frame;
179 pcb2->pcb_context[PCB_REG_SR] = mips_rd_status() &
180 (MIPS_SR_KX | MIPS_SR_UX | MIPS_SR_INT_MASK);
181 /*
182 * FREEBSD_DEVELOPERS_FIXME:
183 * Setup any other CPU-Specific registers (Not MIPS Standard)
184 * and/or bits in other standard MIPS registers (if CPU-Specific)
185 * that are needed.
186 */
187
188 td2->td_md.md_tls = td1->td_md.md_tls;
189 td2->td_md.md_saved_intr = MIPS_SR_INT_IE;
190 td2->td_md.md_spinlock_count = 1;
191 #ifdef CPU_CNMIPS
192 if (td1->td_md.md_flags & MDTD_COP2USED) {
193 if (td1->td_md.md_cop2owner == COP2_OWNER_USERLAND) {
194 if (td1->td_md.md_ucop2)
195 octeon_cop2_save(td1->td_md.md_ucop2);
196 else
197 panic("cpu_fork: ucop2 is NULL but COP2 is enabled");
198 }
199 else {
200 if (td1->td_md.md_cop2)
201 octeon_cop2_save(td1->td_md.md_cop2);
202 else
203 panic("cpu_fork: cop2 is NULL but COP2 is enabled");
204 }
205 }
206
207 if (td1->td_md.md_cop2) {
208 td2->td_md.md_cop2 = octeon_cop2_alloc_ctx();
209 memcpy(td2->td_md.md_cop2, td1->td_md.md_cop2,
210 sizeof(*td1->td_md.md_cop2));
211 }
212 if (td1->td_md.md_ucop2) {
213 td2->td_md.md_ucop2 = octeon_cop2_alloc_ctx();
214 memcpy(td2->td_md.md_ucop2, td1->td_md.md_ucop2,
215 sizeof(*td1->td_md.md_ucop2));
216 }
217 td2->td_md.md_cop2owner = td1->td_md.md_cop2owner;
218 pcb2->pcb_context[PCB_REG_SR] |= MIPS_SR_PX | MIPS_SR_UX | MIPS_SR_KX | MIPS_SR_SX;
219 /* Clear COP2 bits for userland & kernel */
220 td2->td_frame->sr &= ~MIPS_SR_COP_2_BIT;
221 pcb2->pcb_context[PCB_REG_SR] &= ~MIPS_SR_COP_2_BIT;
222 #endif
223 }
224
225 /*
226 * Intercept the return address from a freshly forked process that has NOT
227 * been scheduled yet.
228 *
229 * This is needed to make kernel threads stay in kernel mode.
230 */
231 void
cpu_set_fork_handler(struct thread * td,void (* func)__P ((void *)),void * arg)232 cpu_set_fork_handler(struct thread *td, void (*func) __P((void *)), void *arg)
233 {
234 /*
235 * Note that the trap frame follows the args, so the function
236 * is really called like this: func(arg, frame);
237 */
238 td->td_pcb->pcb_context[PCB_REG_S0] = (register_t)(intptr_t)func;
239 td->td_pcb->pcb_context[PCB_REG_S1] = (register_t)(intptr_t)arg;
240 }
241
242 void
cpu_exit(struct thread * td)243 cpu_exit(struct thread *td)
244 {
245 }
246
247 void
cpu_thread_exit(struct thread * td)248 cpu_thread_exit(struct thread *td)
249 {
250
251 if (PCPU_GET(fpcurthread) == td)
252 PCPU_GET(fpcurthread) = (struct thread *)0;
253 #ifdef CPU_CNMIPS
254 if (td->td_md.md_cop2)
255 memset(td->td_md.md_cop2, 0,
256 sizeof(*td->td_md.md_cop2));
257 if (td->td_md.md_ucop2)
258 memset(td->td_md.md_ucop2, 0,
259 sizeof(*td->td_md.md_ucop2));
260 #endif
261 }
262
263 void
cpu_thread_free(struct thread * td)264 cpu_thread_free(struct thread *td)
265 {
266 #ifdef CPU_CNMIPS
267 if (td->td_md.md_cop2)
268 octeon_cop2_free_ctx(td->td_md.md_cop2);
269 if (td->td_md.md_ucop2)
270 octeon_cop2_free_ctx(td->td_md.md_ucop2);
271 td->td_md.md_cop2 = NULL;
272 td->td_md.md_ucop2 = NULL;
273 #endif
274 }
275
276 void
cpu_thread_clean(struct thread * td)277 cpu_thread_clean(struct thread *td)
278 {
279 }
280
281 void
cpu_thread_swapin(struct thread * td)282 cpu_thread_swapin(struct thread *td)
283 {
284 pt_entry_t *pte;
285 int i;
286
287 /*
288 * The kstack may be at a different physical address now.
289 * Cache the PTEs for the Kernel stack in the machine dependent
290 * part of the thread struct so cpu_switch() can quickly map in
291 * the pcb struct and kernel stack.
292 */
293 for (i = 0; i < KSTACK_PAGES; i++) {
294 pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);
295 td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;
296 }
297 }
298
299 void
cpu_thread_swapout(struct thread * td)300 cpu_thread_swapout(struct thread *td)
301 {
302 }
303
304 void
cpu_thread_alloc(struct thread * td)305 cpu_thread_alloc(struct thread *td)
306 {
307 pt_entry_t *pte;
308 int i;
309
310 KASSERT((td->td_kstack & (1 << PAGE_SHIFT)) == 0, ("kernel stack must be aligned."));
311 td->td_pcb = (struct pcb *)(td->td_kstack +
312 td->td_kstack_pages * PAGE_SIZE) - 1;
313 td->td_frame = &td->td_pcb->pcb_regs;
314
315 for (i = 0; i < KSTACK_PAGES; i++) {
316 pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);
317 td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;
318 }
319 }
320
321 void
cpu_set_syscall_retval(struct thread * td,int error)322 cpu_set_syscall_retval(struct thread *td, int error)
323 {
324 struct trapframe *locr0 = td->td_frame;
325 unsigned int code;
326 int quad_syscall;
327
328 code = locr0->v0;
329 quad_syscall = 0;
330 #if defined(__mips_n32) || defined(__mips_n64)
331 #ifdef COMPAT_FREEBSD32
332 if (code == SYS___syscall && SV_PROC_FLAG(td->td_proc, SV_ILP32))
333 quad_syscall = 1;
334 #endif
335 #else
336 if (code == SYS___syscall)
337 quad_syscall = 1;
338 #endif
339
340 if (code == SYS_syscall)
341 code = locr0->a0;
342 else if (code == SYS___syscall) {
343 if (quad_syscall)
344 code = _QUAD_LOWWORD ? locr0->a1 : locr0->a0;
345 else
346 code = locr0->a0;
347 }
348
349 switch (error) {
350 case 0:
351 if (quad_syscall && code != SYS_lseek) {
352 /*
353 * System call invoked through the
354 * SYS___syscall interface but the
355 * return value is really just 32
356 * bits.
357 */
358 locr0->v0 = td->td_retval[0];
359 if (_QUAD_LOWWORD)
360 locr0->v1 = td->td_retval[0];
361 locr0->a3 = 0;
362 } else {
363 locr0->v0 = td->td_retval[0];
364 locr0->v1 = td->td_retval[1];
365 locr0->a3 = 0;
366 }
367 break;
368
369 case ERESTART:
370 locr0->pc = td->td_pcb->pcb_tpc;
371 break;
372
373 case EJUSTRETURN:
374 break; /* nothing to do */
375
376 default:
377 if (quad_syscall && code != SYS_lseek) {
378 locr0->v0 = error;
379 if (_QUAD_LOWWORD)
380 locr0->v1 = error;
381 locr0->a3 = 1;
382 } else {
383 locr0->v0 = error;
384 locr0->a3 = 1;
385 }
386 }
387 }
388
389 /*
390 * Initialize machine state (pcb and trap frame) for a new thread about to
391 * upcall. Put enough state in the new thread's PCB to get it to go back
392 * userret(), where we can intercept it again to set the return (upcall)
393 * Address and stack, along with those from upcalls that are from other sources
394 * such as those generated in thread_userret() itself.
395 */
396 void
cpu_set_upcall(struct thread * td,struct thread * td0)397 cpu_set_upcall(struct thread *td, struct thread *td0)
398 {
399 struct pcb *pcb2;
400
401 /* Point the pcb to the top of the stack. */
402 pcb2 = td->td_pcb;
403
404 /*
405 * Copy the upcall pcb. This loads kernel regs.
406 * Those not loaded individually below get their default
407 * values here.
408 *
409 * XXXKSE It might be a good idea to simply skip this as
410 * the values of the other registers may be unimportant.
411 * This would remove any requirement for knowing the KSE
412 * at this time (see the matching comment below for
413 * more analysis) (need a good safe default).
414 * In MIPS, the trapframe is the first element of the PCB
415 * and gets copied when we copy the PCB. No separate copy
416 * is needed.
417 */
418 bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
419
420 /*
421 * Set registers for trampoline to user mode.
422 */
423
424 pcb2->pcb_context[PCB_REG_RA] = (register_t)(intptr_t)fork_trampoline;
425 /* Make sp 64-bit aligned */
426 pcb2->pcb_context[PCB_REG_SP] = (register_t)(((vm_offset_t)td->td_pcb &
427 ~(sizeof(__int64_t) - 1)) - CALLFRAME_SIZ);
428 pcb2->pcb_context[PCB_REG_S0] = (register_t)(intptr_t)fork_return;
429 pcb2->pcb_context[PCB_REG_S1] = (register_t)(intptr_t)td;
430 pcb2->pcb_context[PCB_REG_S2] = (register_t)(intptr_t)td->td_frame;
431 /* Dont set IE bit in SR. sched lock release will take care of it */
432 pcb2->pcb_context[PCB_REG_SR] = mips_rd_status() &
433 (MIPS_SR_PX | MIPS_SR_KX | MIPS_SR_UX | MIPS_SR_INT_MASK);
434
435 /*
436 * FREEBSD_DEVELOPERS_FIXME:
437 * Setup any other CPU-Specific registers (Not MIPS Standard)
438 * that are needed.
439 */
440
441 /* SMP Setup to release sched_lock in fork_exit(). */
442 td->td_md.md_spinlock_count = 1;
443 td->td_md.md_saved_intr = MIPS_SR_INT_IE;
444 #if 0
445 /* Maybe we need to fix this? */
446 td->td_md.md_saved_sr = ( (MIPS_SR_COP_2_BIT | MIPS_SR_COP_0_BIT) |
447 (MIPS_SR_PX | MIPS_SR_UX | MIPS_SR_KX | MIPS_SR_SX) |
448 (MIPS_SR_INT_IE | MIPS_HARD_INT_MASK));
449 #endif
450 }
451
452 /*
453 * Set that machine state for performing an upcall that has to
454 * be done in thread_userret() so that those upcalls generated
455 * in thread_userret() itself can be done as well.
456 */
457 void
cpu_set_upcall_kse(struct thread * td,void (* entry)(void *),void * arg,stack_t * stack)458 cpu_set_upcall_kse(struct thread *td, void (*entry)(void *), void *arg,
459 stack_t *stack)
460 {
461 struct trapframe *tf;
462 register_t sp;
463
464 /*
465 * At the point where a function is called, sp must be 8
466 * byte aligned[for compatibility with 64-bit CPUs]
467 * in ``See MIPS Run'' by D. Sweetman, p. 269
468 * align stack
469 */
470 sp = ((register_t)(intptr_t)(stack->ss_sp + stack->ss_size) & ~0x7) -
471 CALLFRAME_SIZ;
472
473 /*
474 * Set the trap frame to point at the beginning of the uts
475 * function.
476 */
477 tf = td->td_frame;
478 bzero(tf, sizeof(struct trapframe));
479 tf->sp = sp;
480 tf->pc = (register_t)(intptr_t)entry;
481 /*
482 * MIPS ABI requires T9 to be the same as PC
483 * in subroutine entry point
484 */
485 tf->t9 = (register_t)(intptr_t)entry;
486 tf->a0 = (register_t)(intptr_t)arg;
487
488 /*
489 * Keep interrupt mask
490 */
491 td->td_frame->sr = MIPS_SR_KSU_USER | MIPS_SR_EXL | MIPS_SR_INT_IE |
492 (mips_rd_status() & MIPS_SR_INT_MASK);
493 #if defined(__mips_n32)
494 td->td_frame->sr |= MIPS_SR_PX;
495 #elif defined(__mips_n64)
496 td->td_frame->sr |= MIPS_SR_PX | MIPS_SR_UX | MIPS_SR_KX;
497 #endif
498 /* tf->sr |= (ALL_INT_MASK & idle_mask) | SR_INT_ENAB; */
499 /**XXX the above may now be wrong -- mips2 implements this as panic */
500 /*
501 * FREEBSD_DEVELOPERS_FIXME:
502 * Setup any other CPU-Specific registers (Not MIPS Standard)
503 * that are needed.
504 */
505 }
506
507 /*
508 * Implement the pre-zeroed page mechanism.
509 * This routine is called from the idle loop.
510 */
511
512 #define ZIDLE_LO(v) ((v) * 2 / 3)
513 #define ZIDLE_HI(v) ((v) * 4 / 5)
514
515 /*
516 * Allocate a pool of sf_bufs (sendfile(2) or "super-fast" if you prefer. :-))
517 */
518 #ifndef __mips_n64
519 static void
sf_buf_init(void * arg)520 sf_buf_init(void *arg)
521 {
522 struct sf_buf *sf_bufs;
523 vm_offset_t sf_base;
524 int i;
525
526 nsfbufs = NSFBUFS;
527 TUNABLE_INT_FETCH("kern.ipc.nsfbufs", &nsfbufs);
528
529 mtx_init(&sf_freelist.sf_lock, "sf_bufs list lock", NULL, MTX_DEF);
530 SLIST_INIT(&sf_freelist.sf_head);
531 sf_base = kva_alloc(nsfbufs * PAGE_SIZE);
532 sf_bufs = malloc(nsfbufs * sizeof(struct sf_buf), M_TEMP,
533 M_NOWAIT | M_ZERO);
534 for (i = 0; i < nsfbufs; i++) {
535 sf_bufs[i].kva = sf_base + i * PAGE_SIZE;
536 SLIST_INSERT_HEAD(&sf_freelist.sf_head, &sf_bufs[i], free_list);
537 }
538 sf_buf_alloc_want = 0;
539 }
540
541 /*
542 * Get an sf_buf from the freelist. Will block if none are available.
543 */
544 struct sf_buf *
sf_buf_alloc(struct vm_page * m,int flags)545 sf_buf_alloc(struct vm_page *m, int flags)
546 {
547 struct sf_buf *sf;
548 int error;
549
550 mtx_lock(&sf_freelist.sf_lock);
551 while ((sf = SLIST_FIRST(&sf_freelist.sf_head)) == NULL) {
552 if (flags & SFB_NOWAIT)
553 break;
554 sf_buf_alloc_want++;
555 SFSTAT_INC(sf_allocwait);
556 error = msleep(&sf_freelist, &sf_freelist.sf_lock,
557 (flags & SFB_CATCH) ? PCATCH | PVM : PVM, "sfbufa", 0);
558 sf_buf_alloc_want--;
559
560 /*
561 * If we got a signal, don't risk going back to sleep.
562 */
563 if (error)
564 break;
565 }
566 if (sf != NULL) {
567 SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
568 sf->m = m;
569 nsfbufsused++;
570 nsfbufspeak = imax(nsfbufspeak, nsfbufsused);
571 pmap_qenter(sf->kva, &sf->m, 1);
572 }
573 mtx_unlock(&sf_freelist.sf_lock);
574 return (sf);
575 }
576
577 /*
578 * Release resources back to the system.
579 */
580 void
sf_buf_free(struct sf_buf * sf)581 sf_buf_free(struct sf_buf *sf)
582 {
583 pmap_qremove(sf->kva, 1);
584 mtx_lock(&sf_freelist.sf_lock);
585 SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
586 nsfbufsused--;
587 if (sf_buf_alloc_want > 0)
588 wakeup(&sf_freelist);
589 mtx_unlock(&sf_freelist.sf_lock);
590 }
591 #endif /* !__mips_n64 */
592
593 /*
594 * Software interrupt handler for queued VM system processing.
595 */
596 void
swi_vm(void * dummy)597 swi_vm(void *dummy)
598 {
599
600 if (busdma_swi_pending)
601 busdma_swi();
602 }
603
604 int
cpu_set_user_tls(struct thread * td,void * tls_base)605 cpu_set_user_tls(struct thread *td, void *tls_base)
606 {
607
608 td->td_md.md_tls = (char*)tls_base;
609
610 return (0);
611 }
612
613 #ifdef DDB
614 #include <ddb/ddb.h>
615
616 #define DB_PRINT_REG(ptr, regname) \
617 db_printf(" %-12s %p\n", #regname, (void *)(intptr_t)((ptr)->regname))
618
619 #define DB_PRINT_REG_ARRAY(ptr, arrname, regname) \
620 db_printf(" %-12s %p\n", #regname, (void *)(intptr_t)((ptr)->arrname[regname]))
621
622 static void
dump_trapframe(struct trapframe * trapframe)623 dump_trapframe(struct trapframe *trapframe)
624 {
625
626 db_printf("Trapframe at %p\n", trapframe);
627
628 DB_PRINT_REG(trapframe, zero);
629 DB_PRINT_REG(trapframe, ast);
630 DB_PRINT_REG(trapframe, v0);
631 DB_PRINT_REG(trapframe, v1);
632 DB_PRINT_REG(trapframe, a0);
633 DB_PRINT_REG(trapframe, a1);
634 DB_PRINT_REG(trapframe, a2);
635 DB_PRINT_REG(trapframe, a3);
636 #if defined(__mips_n32) || defined(__mips_n64)
637 DB_PRINT_REG(trapframe, a4);
638 DB_PRINT_REG(trapframe, a5);
639 DB_PRINT_REG(trapframe, a6);
640 DB_PRINT_REG(trapframe, a7);
641 DB_PRINT_REG(trapframe, t0);
642 DB_PRINT_REG(trapframe, t1);
643 DB_PRINT_REG(trapframe, t2);
644 DB_PRINT_REG(trapframe, t3);
645 #else
646 DB_PRINT_REG(trapframe, t0);
647 DB_PRINT_REG(trapframe, t1);
648 DB_PRINT_REG(trapframe, t2);
649 DB_PRINT_REG(trapframe, t3);
650 DB_PRINT_REG(trapframe, t4);
651 DB_PRINT_REG(trapframe, t5);
652 DB_PRINT_REG(trapframe, t6);
653 DB_PRINT_REG(trapframe, t7);
654 #endif
655 DB_PRINT_REG(trapframe, s0);
656 DB_PRINT_REG(trapframe, s1);
657 DB_PRINT_REG(trapframe, s2);
658 DB_PRINT_REG(trapframe, s3);
659 DB_PRINT_REG(trapframe, s4);
660 DB_PRINT_REG(trapframe, s5);
661 DB_PRINT_REG(trapframe, s6);
662 DB_PRINT_REG(trapframe, s7);
663 DB_PRINT_REG(trapframe, t8);
664 DB_PRINT_REG(trapframe, t9);
665 DB_PRINT_REG(trapframe, k0);
666 DB_PRINT_REG(trapframe, k1);
667 DB_PRINT_REG(trapframe, gp);
668 DB_PRINT_REG(trapframe, sp);
669 DB_PRINT_REG(trapframe, s8);
670 DB_PRINT_REG(trapframe, ra);
671 DB_PRINT_REG(trapframe, sr);
672 DB_PRINT_REG(trapframe, mullo);
673 DB_PRINT_REG(trapframe, mulhi);
674 DB_PRINT_REG(trapframe, badvaddr);
675 DB_PRINT_REG(trapframe, cause);
676 DB_PRINT_REG(trapframe, pc);
677 }
678
DB_SHOW_COMMAND(pcb,ddb_dump_pcb)679 DB_SHOW_COMMAND(pcb, ddb_dump_pcb)
680 {
681 struct thread *td;
682 struct pcb *pcb;
683 struct trapframe *trapframe;
684
685 /* Determine which thread to examine. */
686 if (have_addr)
687 td = db_lookup_thread(addr, TRUE);
688 else
689 td = curthread;
690
691 pcb = td->td_pcb;
692
693 db_printf("Thread %d at %p\n", td->td_tid, td);
694
695 db_printf("PCB at %p\n", pcb);
696
697 trapframe = &pcb->pcb_regs;
698 dump_trapframe(trapframe);
699
700 db_printf("PCB Context:\n");
701 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S0);
702 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S1);
703 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S2);
704 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S3);
705 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S4);
706 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S5);
707 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S6);
708 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S7);
709 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_SP);
710 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S8);
711 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_RA);
712 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_SR);
713 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_GP);
714 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_PC);
715
716 db_printf("PCB onfault = %p\n", pcb->pcb_onfault);
717 db_printf("md_saved_intr = 0x%0lx\n", (long)td->td_md.md_saved_intr);
718 db_printf("md_spinlock_count = %d\n", td->td_md.md_spinlock_count);
719
720 if (td->td_frame != trapframe) {
721 db_printf("td->td_frame %p is not the same as pcb_regs %p\n",
722 td->td_frame, trapframe);
723 }
724 }
725
726 /*
727 * Dump the trapframe beginning at address specified by first argument.
728 */
DB_SHOW_COMMAND(trapframe,ddb_dump_trapframe)729 DB_SHOW_COMMAND(trapframe, ddb_dump_trapframe)
730 {
731
732 if (!have_addr)
733 return;
734
735 dump_trapframe((struct trapframe *)addr);
736 }
737
738 #endif /* DDB */
739