Annotation of sys/arch/alpha/alpha/machdep.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: machdep.c,v 1.110 2007/06/06 17:15:11 deraadt Exp $ */
2: /* $NetBSD: machdep.c,v 1.210 2000/06/01 17:12:38 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10: * NASA Ames Research Center and by Chris G. Demetriou.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the NetBSD
23: * Foundation, Inc. and its contributors.
24: * 4. Neither the name of The NetBSD Foundation nor the names of its
25: * contributors may be used to endorse or promote products derived
26: * from this software without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38: * POSSIBILITY OF SUCH DAMAGE.
39: */
40:
41: /*
42: * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
43: * All rights reserved.
44: *
45: * Author: Chris G. Demetriou
46: *
47: * Permission to use, copy, modify and distribute this software and
48: * its documentation is hereby granted, provided that both the copyright
49: * notice and this permission notice appear in all copies of the
50: * software, derivative works or modified versions, and any portions
51: * thereof, and that both notices appear in supporting documentation.
52: *
53: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
54: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
55: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
56: *
57: * Carnegie Mellon requests users of this software to return to
58: *
59: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
60: * School of Computer Science
61: * Carnegie Mellon University
62: * Pittsburgh PA 15213-3890
63: *
64: * any improvements or extensions that they make and grant Carnegie the
65: * rights to redistribute these changes.
66: */
67:
68: #include <sys/param.h>
69: #include <sys/systm.h>
70: #include <sys/signalvar.h>
71: #include <sys/kernel.h>
72: #include <sys/proc.h>
73: #include <sys/sched.h>
74: #include <sys/buf.h>
75: #include <sys/reboot.h>
76: #include <sys/device.h>
77: #include <sys/conf.h>
78: #include <sys/file.h>
79: #include <sys/timeout.h>
80: #include <sys/malloc.h>
81: #include <sys/mbuf.h>
82: #include <sys/msgbuf.h>
83: #include <sys/ioctl.h>
84: #include <sys/tty.h>
85: #include <sys/user.h>
86: #include <sys/exec.h>
87: #include <sys/exec_ecoff.h>
88: #include <uvm/uvm_extern.h>
89: #include <sys/sysctl.h>
90: #include <sys/core.h>
91: #include <sys/kcore.h>
92: #include <machine/kcore.h>
93: #ifndef NO_IEEE
94: #include <machine/fpu.h>
95: #endif
96: #ifdef SYSVMSG
97: #include <sys/msg.h>
98: #endif
99: #include <sys/timetc.h>
100:
101: #include <sys/mount.h>
102: #include <sys/syscallargs.h>
103:
104: #include <dev/cons.h>
105:
106: #include <machine/autoconf.h>
107: #include <machine/cpu.h>
108: #include <machine/reg.h>
109: #include <machine/rpb.h>
110: #include <machine/prom.h>
111: #include <machine/cpuconf.h>
112: #ifndef NO_IEEE
113: #include <machine/ieeefp.h>
114: #endif
115:
116: #include <dev/pci/pcivar.h>
117:
118: #ifdef DDB
119: #include <machine/db_machdep.h>
120: #include <ddb/db_access.h>
121: #include <ddb/db_sym.h>
122: #include <ddb/db_extern.h>
123: #endif
124:
125: int cpu_dump(void);
126: int cpu_dumpsize(void);
127: u_long cpu_dump_mempagecnt(void);
128: void dumpsys(void);
129: caddr_t allocsys(caddr_t);
130: void identifycpu(void);
131: void regdump(struct trapframe *framep);
132: void printregs(struct reg *);
133:
134: /*
135: * Declare these as initialized data so we can patch them.
136: */
137: #ifndef BUFCACHEPERCENT
138: #define BUFCACHEPERCENT 10
139: #endif
140:
141: #ifdef BUFPAGES
142: int bufpages = BUFPAGES;
143: #else
144: int bufpages = 0;
145: #endif
146: int bufcachepercent = BUFCACHEPERCENT;
147:
148: struct vm_map *exec_map = NULL;
149: struct vm_map *phys_map = NULL;
150:
151: #ifdef APERTURE
152: #ifdef INSECURE
153: int allowaperture = 1;
154: #else
155: int allowaperture = 0;
156: #endif
157: #endif
158:
159: int totalphysmem; /* total amount of physical memory in system */
160: int physmem; /* physical mem used by OpenBSD + some rsvd */
161: int resvmem; /* amount of memory reserved for PROM */
162: int unusedmem; /* amount of memory for OS that we don't use */
163: int unknownmem; /* amount of memory with an unknown use */
164:
165: int cputype; /* system type, from the RPB */
166: int alpha_cpus;
167:
168: int bootdev_debug = 0; /* patchable, or from DDB */
169:
170: /* the following is used externally (sysctl_hw) */
171: char machine[] = MACHINE; /* from <machine/param.h> */
172: char cpu_model[128];
173: char root_device[17];
174:
175: struct user *proc0paddr;
176:
177: /* Number of machine cycles per microsecond */
178: u_int64_t cycles_per_usec;
179:
180: struct bootinfo_kernel bootinfo;
181:
182: /* For built-in TCDS */
183: #if defined(DEC_3000_300) || defined(DEC_3000_500)
184: u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2];
185: #endif
186:
187: struct platform platform;
188:
189: /* for cpu_sysctl() */
190: int alpha_unaligned_print = 1; /* warn about unaligned accesses */
191: int alpha_unaligned_fix = 1; /* fix up unaligned accesses */
192: int alpha_unaligned_sigbus = 1; /* SIGBUS on fixed-up accesses */
193: #ifndef NO_IEEE
194: int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */
195: #endif
196:
197: /* used by hw_sysctl */
198: extern char *hw_serial;
199:
200: /*
201: * XXX This should be dynamically sized, but we have the chicken-egg problem!
202: * XXX it should also be larger than it is, because not all of the mddt
203: * XXX clusters end up being used for VM.
204: */
205: phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */
206: int mem_cluster_cnt;
207:
208: void
209: alpha_init(pfn, ptb, bim, bip, biv)
210: u_long pfn; /* first free PFN number */
211: u_long ptb; /* PFN of current level 1 page table */
212: u_long bim; /* bootinfo magic */
213: u_long bip; /* bootinfo pointer */
214: u_long biv; /* bootinfo version */
215: {
216: extern char kernel_text[], _end[];
217: struct mddt *mddtp;
218: struct mddt_cluster *memc;
219: int i, mddtweird;
220: struct vm_physseg *vps;
221: vaddr_t kernstart, kernend;
222: paddr_t kernstartpfn, kernendpfn, pfn0, pfn1;
223: vsize_t size;
224: char *p;
225: caddr_t v;
226: const char *bootinfo_msg;
227: const struct cpuinit *c;
228: extern caddr_t esym;
229: struct cpu_info *ci;
230: cpuid_t cpu_id;
231:
232: /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */
233:
234: /*
235: * Turn off interrupts (not mchecks) and floating point.
236: * Make sure the instruction and data streams are consistent.
237: */
238: (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH);
239: alpha_pal_wrfen(0);
240: ALPHA_TBIA();
241: alpha_pal_imb();
242:
243: /* Initialize the SCB. */
244: scb_init();
245:
246: cpu_id = cpu_number();
247:
248: #if defined(MULTIPROCESSOR)
249: /*
250: * Set our SysValue to the address of our cpu_info structure.
251: * Secondary processors do this in their spinup trampoline.
252: */
253: alpha_pal_wrval((u_long)&cpu_info[cpu_id]);
254: #endif
255:
256: ci = curcpu();
257: ci->ci_cpuid = cpu_id;
258:
259: /*
260: * Get critical system information (if possible, from the
261: * information provided by the boot program).
262: */
263: bootinfo_msg = NULL;
264: if (bim == BOOTINFO_MAGIC) {
265: if (biv == 0) { /* backward compat */
266: biv = *(u_long *)bip;
267: bip += 8;
268: }
269: switch (biv) {
270: case 1: {
271: struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip;
272:
273: bootinfo.ssym = v1p->ssym;
274: bootinfo.esym = v1p->esym;
275: /* hwrpb may not be provided by boot block in v1 */
276: if (v1p->hwrpb != NULL) {
277: bootinfo.hwrpb_phys =
278: ((struct rpb *)v1p->hwrpb)->rpb_phys;
279: bootinfo.hwrpb_size = v1p->hwrpbsize;
280: } else {
281: bootinfo.hwrpb_phys =
282: ((struct rpb *)HWRPB_ADDR)->rpb_phys;
283: bootinfo.hwrpb_size =
284: ((struct rpb *)HWRPB_ADDR)->rpb_size;
285: }
286: bcopy(v1p->boot_flags, bootinfo.boot_flags,
287: min(sizeof v1p->boot_flags,
288: sizeof bootinfo.boot_flags));
289: bcopy(v1p->booted_kernel, bootinfo.booted_kernel,
290: min(sizeof v1p->booted_kernel,
291: sizeof bootinfo.booted_kernel));
292: /* booted dev not provided in bootinfo */
293: init_prom_interface((struct rpb *)
294: ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys));
295: prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev,
296: sizeof bootinfo.booted_dev);
297: break;
298: }
299: default:
300: bootinfo_msg = "unknown bootinfo version";
301: goto nobootinfo;
302: }
303: } else {
304: bootinfo_msg = "boot program did not pass bootinfo";
305: nobootinfo:
306: bootinfo.ssym = (u_long)_end;
307: bootinfo.esym = (u_long)_end;
308: bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys;
309: bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size;
310: init_prom_interface((struct rpb *)HWRPB_ADDR);
311: prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags,
312: sizeof bootinfo.boot_flags);
313: prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel,
314: sizeof bootinfo.booted_kernel);
315: prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev,
316: sizeof bootinfo.booted_dev);
317: }
318:
319: esym = (caddr_t)bootinfo.esym;
320: /*
321: * Initialize the kernel's mapping of the RPB. It's needed for
322: * lots of things.
323: */
324: hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys);
325:
326: #if defined(DEC_3000_300) || defined(DEC_3000_500)
327: if (hwrpb->rpb_type == ST_DEC_3000_300 ||
328: hwrpb->rpb_type == ST_DEC_3000_500) {
329: prom_getenv(PROM_E_SCSIID, dec_3000_scsiid,
330: sizeof(dec_3000_scsiid));
331: prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast,
332: sizeof(dec_3000_scsifast));
333: }
334: #endif
335:
336: /*
337: * Remember how many cycles there are per microsecond,
338: * so that we can use delay(). Round up, for safety.
339: */
340: cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000;
341:
342: /*
343: * Initialize the (temporary) bootstrap console interface, so
344: * we can use printf until the VM system starts being setup.
345: * The real console is initialized before then.
346: */
347: init_bootstrap_console();
348:
349: /* OUTPUT NOW ALLOWED */
350:
351: /* delayed from above */
352: if (bootinfo_msg)
353: printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n",
354: bootinfo_msg, bim, bip, biv);
355:
356: /* Initialize the trap vectors on the primary processor. */
357: trap_init();
358:
359: /*
360: * Find out what hardware we're on, and do basic initialization.
361: */
362: cputype = hwrpb->rpb_type;
363: if (cputype < 0) {
364: /*
365: * At least some white-box systems have SRM which
366: * reports a systype that's the negative of their
367: * blue-box counterpart.
368: */
369: cputype = -cputype;
370: }
371: c = platform_lookup(cputype);
372: if (c == NULL) {
373: platform_not_supported();
374: /* NOTREACHED */
375: }
376: (*c->init)();
377: strlcpy(cpu_model, platform.model, sizeof cpu_model);
378:
379: /*
380: * Initialize the real console, so that the bootstrap console is
381: * no longer necessary.
382: */
383: (*platform.cons_init)();
384:
385: #if 0
386: /* Paranoid sanity checking */
387:
388: assert(hwrpb->rpb_primary_cpu_id == alpha_pal_whami());
389:
390: /*
391: * On single-CPU systypes, the primary should always be CPU 0,
392: * except on Alpha 8200 systems where the CPU id is related
393: * to the VID, which is related to the Turbo Laser node id.
394: */
395: if (cputype != ST_DEC_21000)
396: assert(hwrpb->rpb_primary_cpu_id == 0);
397: #endif
398:
399: /* NO MORE FIRMWARE ACCESS ALLOWED */
400: #ifdef _PMAP_MAY_USE_PROM_CONSOLE
401: /*
402: * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and
403: * XXX pmap_uses_prom_console() evaluates to non-zero.)
404: */
405: #endif
406:
407: #ifndef SMALL_KERNEL
408: /*
409: * If we run on a BWX-capable processor, override cpu_switch
410: * with a faster version.
411: * We do this now because the kernel text might be mapped
412: * read-only eventually (although this is not the case at the moment).
413: */
414: if (alpha_implver() >= ALPHA_IMPLVER_EV5) {
415: if (~alpha_amask(ALPHA_AMASK_BWX) != 0) {
416: extern vaddr_t __bwx_switch0, __bwx_switch1,
417: __bwx_switch2, __bwx_switch3;
418: u_int32_t *dst, *src, *end;
419:
420: src = (u_int32_t *)&__bwx_switch2;
421: end = (u_int32_t *)&__bwx_switch3;
422: dst = (u_int32_t *)&__bwx_switch0;
423: while (src != end)
424: *dst++ = *src++;
425: src = (u_int32_t *)&__bwx_switch1;
426: end = (u_int32_t *)&__bwx_switch2;
427: while (src != end)
428: *dst++ = *src++;
429: }
430: }
431: #endif
432:
433: /*
434: * find out this system's page size
435: */
436: if ((uvmexp.pagesize = hwrpb->rpb_page_size) != 8192)
437: panic("page size %d != 8192?!", uvmexp.pagesize);
438:
439: uvm_setpagesize();
440:
441: /*
442: * Find the beginning and end of the kernel (and leave a
443: * bit of space before the beginning for the bootstrap
444: * stack).
445: */
446: kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE;
447: kernend = (vaddr_t)round_page((vaddr_t)bootinfo.esym);
448:
449: kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart));
450: kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend));
451:
452: /*
453: * Find out how much memory is available, by looking at
454: * the memory cluster descriptors. This also tries to do
455: * its best to detect things things that have never been seen
456: * before...
457: */
458: mddtp = (struct mddt *)(((caddr_t)hwrpb) + hwrpb->rpb_memdat_off);
459:
460: /* MDDT SANITY CHECKING */
461: mddtweird = 0;
462: if (mddtp->mddt_cluster_cnt < 2) {
463: mddtweird = 1;
464: printf("WARNING: weird number of mem clusters: %lu\n",
465: mddtp->mddt_cluster_cnt);
466: }
467:
468: #if 0
469: printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt);
470: #endif
471:
472: for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
473: memc = &mddtp->mddt_clusters[i];
474: #if 0
475: printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i,
476: memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage);
477: #endif
478: totalphysmem += memc->mddt_pg_cnt;
479: if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */
480: mem_clusters[mem_cluster_cnt].start =
481: ptoa(memc->mddt_pfn);
482: mem_clusters[mem_cluster_cnt].size =
483: ptoa(memc->mddt_pg_cnt);
484: if (memc->mddt_usage & MDDT_mbz ||
485: memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */
486: memc->mddt_usage & MDDT_PALCODE)
487: mem_clusters[mem_cluster_cnt].size |=
488: VM_PROT_READ;
489: else
490: mem_clusters[mem_cluster_cnt].size |=
491: VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE;
492: mem_cluster_cnt++;
493: } /* XXX else print something! */
494:
495: if (memc->mddt_usage & MDDT_mbz) {
496: mddtweird = 1;
497: printf("WARNING: mem cluster %d has weird "
498: "usage 0x%lx\n", i, memc->mddt_usage);
499: unknownmem += memc->mddt_pg_cnt;
500: continue;
501: }
502: if (memc->mddt_usage & MDDT_NONVOLATILE) {
503: /* XXX should handle these... */
504: printf("WARNING: skipping non-volatile mem "
505: "cluster %d\n", i);
506: unusedmem += memc->mddt_pg_cnt;
507: continue;
508: }
509: if (memc->mddt_usage & MDDT_PALCODE) {
510: resvmem += memc->mddt_pg_cnt;
511: continue;
512: }
513:
514: /*
515: * We have a memory cluster available for system
516: * software use. We must determine if this cluster
517: * holds the kernel.
518: */
519: #ifdef _PMAP_MAY_USE_PROM_CONSOLE
520: /*
521: * XXX If the kernel uses the PROM console, we only use the
522: * XXX memory after the kernel in the first system segment,
523: * XXX to avoid clobbering prom mapping, data, etc.
524: */
525: if (!pmap_uses_prom_console() || physmem == 0) {
526: #endif /* _PMAP_MAY_USE_PROM_CONSOLE */
527: physmem += memc->mddt_pg_cnt;
528: pfn0 = memc->mddt_pfn;
529: pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt;
530: if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) {
531: /*
532: * Must compute the location of the kernel
533: * within the segment.
534: */
535: #if 0
536: printf("Cluster %d contains kernel\n", i);
537: #endif
538: #ifdef _PMAP_MAY_USE_PROM_CONSOLE
539: if (!pmap_uses_prom_console()) {
540: #endif /* _PMAP_MAY_USE_PROM_CONSOLE */
541: if (pfn0 < kernstartpfn) {
542: /*
543: * There is a chunk before the kernel.
544: */
545: #if 0
546: printf("Loading chunk before kernel: "
547: "0x%lx / 0x%lx\n", pfn0, kernstartpfn);
548: #endif
549: uvm_page_physload(pfn0, kernstartpfn,
550: pfn0, kernstartpfn, VM_FREELIST_DEFAULT);
551: }
552: #ifdef _PMAP_MAY_USE_PROM_CONSOLE
553: }
554: #endif /* _PMAP_MAY_USE_PROM_CONSOLE */
555: if (kernendpfn < pfn1) {
556: /*
557: * There is a chunk after the kernel.
558: */
559: #if 0
560: printf("Loading chunk after kernel: "
561: "0x%lx / 0x%lx\n", kernendpfn, pfn1);
562: #endif
563: uvm_page_physload(kernendpfn, pfn1,
564: kernendpfn, pfn1, VM_FREELIST_DEFAULT);
565: }
566: } else {
567: /*
568: * Just load this cluster as one chunk.
569: */
570: #if 0
571: printf("Loading cluster %d: 0x%lx / 0x%lx\n", i,
572: pfn0, pfn1);
573: #endif
574: uvm_page_physload(pfn0, pfn1, pfn0, pfn1,
575: VM_FREELIST_DEFAULT);
576: }
577: #ifdef _PMAP_MAY_USE_PROM_CONSOLE
578: }
579: #endif /* _PMAP_MAY_USE_PROM_CONSOLE */
580: }
581:
582: #ifdef DEBUG
583: /*
584: * Dump out the MDDT if it looks odd...
585: */
586: if (mddtweird) {
587: printf("\n");
588: printf("complete memory cluster information:\n");
589: for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
590: printf("mddt %d:\n", i);
591: printf("\tpfn %lx\n",
592: mddtp->mddt_clusters[i].mddt_pfn);
593: printf("\tcnt %lx\n",
594: mddtp->mddt_clusters[i].mddt_pg_cnt);
595: printf("\ttest %lx\n",
596: mddtp->mddt_clusters[i].mddt_pg_test);
597: printf("\tbva %lx\n",
598: mddtp->mddt_clusters[i].mddt_v_bitaddr);
599: printf("\tbpa %lx\n",
600: mddtp->mddt_clusters[i].mddt_p_bitaddr);
601: printf("\tbcksum %lx\n",
602: mddtp->mddt_clusters[i].mddt_bit_cksum);
603: printf("\tusage %lx\n",
604: mddtp->mddt_clusters[i].mddt_usage);
605: }
606: printf("\n");
607: }
608: #endif
609:
610: if (totalphysmem == 0)
611: panic("can't happen: system seems to have no memory!");
612: #if 0
613: printf("totalphysmem = %u\n", totalphysmem);
614: printf("physmem = %u\n", physmem);
615: printf("resvmem = %d\n", resvmem);
616: printf("unusedmem = %d\n", unusedmem);
617: printf("unknownmem = %d\n", unknownmem);
618: #endif
619:
620: /*
621: * Initialize error message buffer (at end of core).
622: */
623: {
624: vsize_t sz = (vsize_t)round_page(MSGBUFSIZE);
625: vsize_t reqsz = sz;
626:
627: vps = &vm_physmem[vm_nphysseg - 1];
628:
629: /* shrink so that it'll fit in the last segment */
630: if ((vps->avail_end - vps->avail_start) < atop(sz))
631: sz = ptoa(vps->avail_end - vps->avail_start);
632:
633: vps->end -= atop(sz);
634: vps->avail_end -= atop(sz);
635: initmsgbuf((caddr_t) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)), sz);
636:
637: /* Remove the last segment if it now has no pages. */
638: if (vps->start == vps->end)
639: vm_nphysseg--;
640:
641: /* warn if the message buffer had to be shrunk */
642: if (sz != reqsz)
643: printf("WARNING: %ld bytes not available for msgbuf "
644: "in last cluster (%ld used)\n", reqsz, sz);
645:
646: }
647:
648: /*
649: * Init mapping for u page(s) for proc 0
650: */
651: proc0.p_addr = proc0paddr =
652: (struct user *)pmap_steal_memory(UPAGES * PAGE_SIZE, NULL, NULL);
653:
654: /*
655: * Allocate space for system data structures. These data structures
656: * are allocated here instead of cpu_startup() because physical
657: * memory is directly addressable. We don't have to map these into
658: * virtual address space.
659: */
660: size = (vsize_t)allocsys(NULL);
661: v = (caddr_t)pmap_steal_memory(size, NULL, NULL);
662: if ((allocsys(v) - v) != size)
663: panic("alpha_init: table size inconsistency");
664:
665: /*
666: * Clear allocated memory.
667: */
668: bzero(v, size);
669:
670: /*
671: * Initialize the virtual memory system, and set the
672: * page table base register in proc 0's PCB.
673: */
674: pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT),
675: hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt);
676:
677: /*
678: * Initialize the rest of proc 0's PCB, and cache its physical
679: * address.
680: */
681: proc0.p_md.md_pcbpaddr =
682: (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb);
683:
684: /*
685: * Set the kernel sp, reserving space for an (empty) trapframe,
686: * and make proc0's trapframe pointer point to it for sanity.
687: */
688: proc0paddr->u_pcb.pcb_hw.apcb_ksp =
689: (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe);
690: proc0.p_md.md_tf =
691: (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp;
692:
693: /*
694: * Initialize the primary CPU's idle PCB to proc0's. In a
695: * MULTIPROCESSOR configuration, each CPU will later get
696: * its own idle PCB when autoconfiguration runs.
697: */
698: ci->ci_idle_pcb = &proc0paddr->u_pcb;
699: ci->ci_idle_pcb_paddr = (u_long)proc0.p_md.md_pcbpaddr;
700:
701: /*
702: * Look at arguments passed to us and compute boothowto.
703: */
704:
705: #ifdef KADB
706: boothowto |= RB_KDB;
707: #endif
708: for (p = bootinfo.boot_flags; p && *p != '\0'; p++) {
709: /*
710: * Note that we'd really like to differentiate case here,
711: * but the Alpha AXP Architecture Reference Manual
712: * says that we shouldn't.
713: */
714: switch (*p) {
715: case 'a': /* Ignore */
716: case 'A':
717: break;
718:
719: case 'b': /* Enter DDB as soon as the console is initialised */
720: case 'B':
721: boothowto |= RB_KDB;
722: break;
723:
724: case 'c': /* enter user kernel configuration */
725: case 'C':
726: boothowto |= RB_CONFIG;
727: break;
728:
729: #ifdef DEBUG
730: case 'd': /* crash dump immediately after autoconfig */
731: case 'D':
732: boothowto |= RB_DUMP;
733: break;
734: #endif
735:
736: case 'h': /* always halt, never reboot */
737: case 'H':
738: boothowto |= RB_HALT;
739: break;
740:
741: #if 0
742: case 'm': /* mini root present in memory */
743: case 'M':
744: boothowto |= RB_MINIROOT;
745: break;
746: #endif
747:
748: case 'n': /* askname */
749: case 'N':
750: boothowto |= RB_ASKNAME;
751: break;
752:
753: case 's': /* single-user */
754: case 'S':
755: boothowto |= RB_SINGLE;
756: break;
757:
758: case '-':
759: /*
760: * Just ignore this. It's not required, but it's
761: * common for it to be passed regardless.
762: */
763: break;
764:
765: default:
766: printf("Unrecognized boot flag '%c'.\n", *p);
767: break;
768: }
769: }
770:
771:
772: /*
773: * Figure out the number of cpus in the box, from RPB fields.
774: * Really. We mean it.
775: */
776: for (alpha_cpus = 0, i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
777: struct pcs *pcsp;
778:
779: pcsp = LOCATE_PCS(hwrpb, i);
780: if ((pcsp->pcs_flags & PCS_PP) != 0)
781: alpha_cpus++;
782: }
783:
784: /*
785: * Initialize debuggers, and break into them if appropriate.
786: */
787: #ifdef DDB
788: ddb_init();
789:
790: if (boothowto & RB_KDB)
791: Debugger();
792: #endif
793: #ifdef KGDB
794: if (boothowto & RB_KDB)
795: kgdb_connect(0);
796: #endif
797: /*
798: * Figure out our clock frequency, from RPB fields.
799: */
800: hz = hwrpb->rpb_intr_freq >> 12;
801: if (!(60 <= hz && hz <= 10240)) {
802: hz = 1024;
803: #ifdef DIAGNOSTIC
804: printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n",
805: hwrpb->rpb_intr_freq, hz);
806: #endif
807: }
808: }
809:
810: caddr_t
811: allocsys(v)
812: caddr_t v;
813: {
814: /*
815: * Allocate space for system data structures.
816: * The first available kernel virtual address is in "v".
817: * As pages of kernel virtual memory are allocated, "v" is incremented.
818: *
819: * These data structures are allocated here instead of cpu_startup()
820: * because physical memory is directly addressable. We don't have
821: * to map these into virtual address space.
822: */
823: #define valloc(name, type, num) \
824: (name) = (type *)v; v = (caddr_t)ALIGN((name)+(num))
825:
826: #ifdef SYSVMSG
827: valloc(msgpool, char, msginfo.msgmax);
828: valloc(msgmaps, struct msgmap, msginfo.msgseg);
829: valloc(msghdrs, struct msg, msginfo.msgtql);
830: valloc(msqids, struct msqid_ds, msginfo.msgmni);
831: #endif
832:
833: #undef valloc
834:
835: return v;
836: }
837:
838: void
839: consinit()
840: {
841:
842: /*
843: * Everything related to console initialization is done
844: * in alpha_init().
845: */
846: #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE)
847: printf("consinit: %susing prom console\n",
848: pmap_uses_prom_console() ? "" : "not ");
849: #endif
850: }
851:
852: void
853: cpu_startup()
854: {
855: vaddr_t minaddr, maxaddr;
856: #if defined(DEBUG)
857: extern int pmapdebug;
858: int opmapdebug = pmapdebug;
859:
860: pmapdebug = 0;
861: #endif
862:
863: /*
864: * Good {morning,afternoon,evening,night}.
865: */
866: printf(version);
867: identifycpu();
868: printf("total memory = %ld (%ldK)\n", ptoa((u_long)totalphysmem),
869: ptoa((u_long)totalphysmem) / 1024);
870: printf("(%ld reserved for PROM, ", ptoa((u_long)resvmem));
871: printf("%ld used by OpenBSD)\n", ptoa((u_long)physmem));
872: if (unusedmem) {
873: printf("WARNING: unused memory = %ld (%ldK)\n",
874: ptoa((u_long)unusedmem), ptoa((u_long)unusedmem) / 1024);
875: }
876: if (unknownmem) {
877: printf("WARNING: %ld (%ldK) of memory with unknown purpose\n",
878: ptoa((u_long)unknownmem), ptoa((u_long)unknownmem) / 1024);
879: }
880:
881: /*
882: * Determine how many buffers to allocate.
883: * We allocate bufcachepercent% of memory for buffer space.
884: */
885: if (bufpages == 0)
886: bufpages = physmem * bufcachepercent / 100;
887:
888: /*
889: * Allocate a submap for exec arguments. This map effectively
890: * limits the number of processes exec'ing at any time.
891: */
892: minaddr = vm_map_min(kernel_map);
893: exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
894: 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
895:
896: /*
897: * Allocate a submap for physio
898: */
899: phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
900: VM_PHYS_SIZE, 0, FALSE, NULL);
901:
902: #if defined(DEBUG)
903: pmapdebug = opmapdebug;
904: #endif
905: printf("avail memory = %ld (%ldK)\n", (long)ptoa(uvmexp.free),
906: (long)ptoa(uvmexp.free) / 1024);
907: #if 0
908: {
909: extern u_long pmap_pages_stolen;
910:
911: printf("stolen memory for VM structures = %d\n", pmap_pages_stolen * PAGE_SIZE);
912: }
913: #endif
914:
915: /*
916: * Set up buffers, so they can be used to read disk labels.
917: */
918: bufinit();
919:
920: /*
921: * Configure the system.
922: */
923: if (boothowto & RB_CONFIG) {
924: #ifdef BOOT_CONFIG
925: user_config();
926: #else
927: printf("kernel does not support -c; continuing..\n");
928: #endif
929: }
930:
931: /*
932: * Set up the HWPCB so that it's safe to configure secondary
933: * CPUs.
934: */
935: hwrpb_primary_init();
936: }
937:
938: /*
939: * Retrieve the platform name from the DSR.
940: */
941: const char *
942: alpha_dsr_sysname()
943: {
944: struct dsrdb *dsr;
945: const char *sysname;
946:
947: /*
948: * DSR does not exist on early HWRPB versions.
949: */
950: if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS)
951: return (NULL);
952:
953: dsr = (struct dsrdb *)(((caddr_t)hwrpb) + hwrpb->rpb_dsrdb_off);
954: sysname = (const char *)((caddr_t)dsr + (dsr->dsr_sysname_off +
955: sizeof(u_int64_t)));
956: return (sysname);
957: }
958:
959: /*
960: * Lookup the system specified system variation in the provided table,
961: * returning the model string on match.
962: */
963: const char *
964: alpha_variation_name(variation, avtp)
965: u_int64_t variation;
966: const struct alpha_variation_table *avtp;
967: {
968: int i;
969:
970: for (i = 0; avtp[i].avt_model != NULL; i++)
971: if (avtp[i].avt_variation == variation)
972: return (avtp[i].avt_model);
973: return (NULL);
974: }
975:
976: /*
977: * Generate a default platform name based for unknown system variations.
978: */
979: const char *
980: alpha_unknown_sysname()
981: {
982: static char s[128]; /* safe size */
983:
984: snprintf(s, sizeof s, "%s family, unknown model variation 0x%lx",
985: platform.family, hwrpb->rpb_variation & SV_ST_MASK);
986: return ((const char *)s);
987: }
988:
989: void
990: identifycpu()
991: {
992: char *s;
993: int slen;
994:
995: /*
996: * print out CPU identification information.
997: */
998: printf("%s", cpu_model);
999: for(s = cpu_model; *s; ++s)
1000: if(strncasecmp(s, "MHz", 3) == 0)
1001: goto skipMHz;
1002: printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000);
1003: skipMHz:
1004: /* fill in hw_serial if a serial number is known */
1005: slen = strlen(hwrpb->rpb_ssn) + 1;
1006: if (slen > 1) {
1007: hw_serial = malloc(slen, M_SYSCTL, M_NOWAIT);
1008: if (hw_serial)
1009: strlcpy(hw_serial, (char *)hwrpb->rpb_ssn, slen);
1010: }
1011:
1012: printf("\n");
1013: printf("%ld byte page size, %d processor%s.\n",
1014: hwrpb->rpb_page_size, alpha_cpus, alpha_cpus == 1 ? "" : "s");
1015: #if 0
1016: /* this is not particularly useful! */
1017: printf("variation: 0x%lx, revision 0x%lx\n",
1018: hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision);
1019: #endif
1020: }
1021:
1022: int waittime = -1;
1023: struct pcb dumppcb;
1024:
1025: void
1026: boot(howto)
1027: int howto;
1028: {
1029: #if defined(MULTIPROCESSOR)
1030: #if 0 /* XXX See below. */
1031: u_long cpu_id;
1032: #endif
1033: #endif
1034:
1035: #if defined(MULTIPROCESSOR)
1036: /* We must be running on the primary CPU. */
1037: if (alpha_pal_whami() != hwrpb->rpb_primary_cpu_id)
1038: panic("cpu_reboot: not on primary CPU!");
1039: #endif
1040:
1041: /* If system is cold, just halt. */
1042: if (cold) {
1043: /* (Unless the user explicitly asked for reboot.) */
1044: if ((howto & RB_USERREQ) == 0)
1045: howto |= RB_HALT;
1046: goto haltsys;
1047: }
1048:
1049: /* If "always halt" was specified as a boot flag, obey. */
1050: if ((boothowto & RB_HALT) != 0)
1051: howto |= RB_HALT;
1052:
1053: boothowto = howto;
1054: if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
1055: waittime = 0;
1056: vfs_shutdown();
1057: /*
1058: * If we've been adjusting the clock, the todr
1059: * will be out of synch; adjust it now unless
1060: * the system has been sitting in ddb.
1061: */
1062: if ((howto & RB_TIMEBAD) == 0) {
1063: resettodr();
1064: } else {
1065: printf("WARNING: not updating battery clock\n");
1066: }
1067: }
1068:
1069: /* Disable interrupts. */
1070: splhigh();
1071:
1072: /* If rebooting and a dump is requested do it. */
1073: if (howto & RB_DUMP)
1074: dumpsys();
1075:
1076: haltsys:
1077:
1078: /* run any shutdown hooks */
1079: doshutdownhooks();
1080:
1081: #if defined(MULTIPROCESSOR)
1082: #if 0 /* XXX doesn't work when called from here?! */
1083: /* Kill off any secondary CPUs. */
1084: for (cpu_id = 0; cpu_id < hwrpb->rpb_pcs_cnt; cpu_id++) {
1085: if (cpu_id == hwrpb->rpb_primary_cpu_id ||
1086: cpu_info[cpu_id].ci_softc == NULL)
1087: continue;
1088: cpu_halt_secondary(cpu_id);
1089: }
1090: #endif
1091: #endif
1092:
1093: #ifdef BOOTKEY
1094: printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot");
1095: cnpollc(1); /* for proper keyboard command handling */
1096: cngetc();
1097: cnpollc(0);
1098: printf("\n");
1099: #endif
1100:
1101: /* Finally, powerdown/halt/reboot the system. */
1102: if ((howto & RB_POWERDOWN) == RB_POWERDOWN &&
1103: platform.powerdown != NULL) {
1104: (*platform.powerdown)();
1105: printf("WARNING: powerdown failed!\n");
1106: }
1107: printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
1108: prom_halt(howto & RB_HALT);
1109: /*NOTREACHED*/
1110: }
1111:
1112: /*
1113: * These variables are needed by /sbin/savecore
1114: */
1115: u_long dumpmag = 0x8fca0101; /* magic number */
1116: int dumpsize = 0; /* pages */
1117: long dumplo = 0; /* blocks */
1118:
1119: /*
1120: * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers.
1121: */
1122: int
1123: cpu_dumpsize()
1124: {
1125: int size;
1126:
1127: size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) +
1128: ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t));
1129: if (roundup(size, dbtob(1)) != dbtob(1))
1130: return -1;
1131:
1132: return (1);
1133: }
1134:
1135: /*
1136: * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped.
1137: */
1138: u_long
1139: cpu_dump_mempagecnt()
1140: {
1141: u_long i, n;
1142:
1143: n = 0;
1144: for (i = 0; i < mem_cluster_cnt; i++)
1145: n += atop(mem_clusters[i].size);
1146: return (n);
1147: }
1148:
1149: /*
1150: * cpu_dump: dump machine-dependent kernel core dump headers.
1151: */
1152: int
1153: cpu_dump()
1154: {
1155: int (*dump)(dev_t, daddr64_t, caddr_t, size_t);
1156: char buf[dbtob(1)];
1157: kcore_seg_t *segp;
1158: cpu_kcore_hdr_t *cpuhdrp;
1159: phys_ram_seg_t *memsegp;
1160: int i;
1161:
1162: dump = bdevsw[major(dumpdev)].d_dump;
1163:
1164: bzero(buf, sizeof buf);
1165: segp = (kcore_seg_t *)buf;
1166: cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))];
1167: memsegp = (phys_ram_seg_t *)&buf[ALIGN(sizeof(*segp)) +
1168: ALIGN(sizeof(*cpuhdrp))];
1169:
1170: /*
1171: * Generate a segment header.
1172: */
1173: CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
1174: segp->c_size = dbtob(1) - ALIGN(sizeof(*segp));
1175:
1176: /*
1177: * Add the machine-dependent header info.
1178: */
1179: cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map);
1180: cpuhdrp->page_size = PAGE_SIZE;
1181: cpuhdrp->nmemsegs = mem_cluster_cnt;
1182:
1183: /*
1184: * Fill in the memory segment descriptors.
1185: */
1186: for (i = 0; i < mem_cluster_cnt; i++) {
1187: memsegp[i].start = mem_clusters[i].start;
1188: memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK;
1189: }
1190:
1191: return (dump(dumpdev, dumplo, (caddr_t)buf, dbtob(1)));
1192: }
1193:
1194: /*
1195: * This is called by main to set dumplo and dumpsize.
1196: * Dumps always skip the first PAGE_SIZE of disk space
1197: * in case there might be a disk label stored there.
1198: * If there is extra space, put dump at the end to
1199: * reduce the chance that swapping trashes it.
1200: */
1201: void
1202: dumpconf(void)
1203: {
1204: int nblks, dumpblks; /* size of dump area */
1205:
1206: if (dumpdev == NODEV ||
1207: (nblks = (bdevsw[major(dumpdev)].d_psize)(dumpdev)) == 0)
1208: return;
1209: if (nblks <= ctod(1))
1210: return;
1211:
1212: dumpblks = cpu_dumpsize();
1213: if (dumpblks < 0)
1214: return;
1215: dumpblks += ctod(cpu_dump_mempagecnt());
1216:
1217: /* If dump won't fit (incl. room for possible label), punt. */
1218: if (dumpblks > (nblks - ctod(1)))
1219: return;
1220:
1221: /* Put dump at end of partition */
1222: dumplo = nblks - dumpblks;
1223:
1224: /* dumpsize is in page units, and doesn't include headers. */
1225: dumpsize = cpu_dump_mempagecnt();
1226: }
1227:
1228: /*
1229: * Dump the kernel's image to the swap partition.
1230: */
1231: #define BYTES_PER_DUMP PAGE_SIZE
1232:
1233: void
1234: dumpsys()
1235: {
1236: u_long totalbytesleft, bytes, i, n, memcl;
1237: u_long maddr;
1238: int psize;
1239: daddr64_t blkno;
1240: int (*dump)(dev_t, daddr64_t, caddr_t, size_t);
1241: int error;
1242: extern int msgbufmapped;
1243:
1244: /* Save registers. */
1245: savectx(&dumppcb);
1246:
1247: msgbufmapped = 0; /* don't record dump msgs in msgbuf */
1248: if (dumpdev == NODEV)
1249: return;
1250:
1251: /*
1252: * For dumps during autoconfiguration,
1253: * if dump device has already configured...
1254: */
1255: if (dumpsize == 0)
1256: dumpconf();
1257: if (dumplo <= 0) {
1258: printf("\ndump to dev %u,%u not possible\n", major(dumpdev),
1259: minor(dumpdev));
1260: return;
1261: }
1262: printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev),
1263: minor(dumpdev), dumplo);
1264:
1265: psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev);
1266: printf("dump ");
1267: if (psize == -1) {
1268: printf("area unavailable\n");
1269: return;
1270: }
1271:
1272: /* XXX should purge all outstanding keystrokes. */
1273:
1274: if ((error = cpu_dump()) != 0)
1275: goto err;
1276:
1277: totalbytesleft = ptoa(cpu_dump_mempagecnt());
1278: blkno = dumplo + cpu_dumpsize();
1279: dump = bdevsw[major(dumpdev)].d_dump;
1280: error = 0;
1281:
1282: for (memcl = 0; memcl < mem_cluster_cnt; memcl++) {
1283: maddr = mem_clusters[memcl].start;
1284: bytes = mem_clusters[memcl].size & ~PAGE_MASK;
1285:
1286: for (i = 0; i < bytes; i += n, totalbytesleft -= n) {
1287:
1288: /* Print out how many MBs we to go. */
1289: if ((totalbytesleft % (1024*1024)) == 0)
1290: printf("%ld ", totalbytesleft / (1024 * 1024));
1291:
1292: /* Limit size for next transfer. */
1293: n = bytes - i;
1294: if (n > BYTES_PER_DUMP)
1295: n = BYTES_PER_DUMP;
1296:
1297: error = (*dump)(dumpdev, blkno,
1298: (caddr_t)ALPHA_PHYS_TO_K0SEG(maddr), n);
1299: if (error)
1300: goto err;
1301: maddr += n;
1302: blkno += btodb(n); /* XXX? */
1303:
1304: /* XXX should look for keystrokes, to cancel. */
1305: }
1306: }
1307:
1308: err:
1309: switch (error) {
1310: #ifdef DEBUG
1311: case ENXIO:
1312: printf("device bad\n");
1313: break;
1314:
1315: case EFAULT:
1316: printf("device not ready\n");
1317: break;
1318:
1319: case EINVAL:
1320: printf("area improper\n");
1321: break;
1322:
1323: case EIO:
1324: printf("i/o error\n");
1325: break;
1326:
1327: case EINTR:
1328: printf("aborted from console\n");
1329: break;
1330: #endif /* DEBUG */
1331: case 0:
1332: printf("succeeded\n");
1333: break;
1334:
1335: default:
1336: printf("error %d\n", error);
1337: break;
1338: }
1339: printf("\n\n");
1340: delay(1000);
1341: }
1342:
1343: void
1344: frametoreg(framep, regp)
1345: struct trapframe *framep;
1346: struct reg *regp;
1347: {
1348:
1349: regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0];
1350: regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0];
1351: regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1];
1352: regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2];
1353: regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3];
1354: regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4];
1355: regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5];
1356: regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6];
1357: regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7];
1358: regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0];
1359: regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1];
1360: regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2];
1361: regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3];
1362: regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4];
1363: regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5];
1364: regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6];
1365: regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0];
1366: regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1];
1367: regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2];
1368: regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3];
1369: regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4];
1370: regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5];
1371: regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8];
1372: regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9];
1373: regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10];
1374: regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11];
1375: regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA];
1376: regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12];
1377: regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT];
1378: regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP];
1379: /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */
1380: regp->r_regs[R_ZERO] = 0;
1381: }
1382:
1383: void
1384: regtoframe(regp, framep)
1385: struct reg *regp;
1386: struct trapframe *framep;
1387: {
1388:
1389: framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0];
1390: framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0];
1391: framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1];
1392: framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2];
1393: framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3];
1394: framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4];
1395: framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5];
1396: framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6];
1397: framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7];
1398: framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0];
1399: framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1];
1400: framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2];
1401: framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3];
1402: framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4];
1403: framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5];
1404: framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6];
1405: framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0];
1406: framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1];
1407: framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2];
1408: framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3];
1409: framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4];
1410: framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5];
1411: framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8];
1412: framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9];
1413: framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10];
1414: framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11];
1415: framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA];
1416: framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12];
1417: framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT];
1418: framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP];
1419: /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */
1420: /* ??? = regp->r_regs[R_ZERO]; */
1421: }
1422:
1423: void
1424: printregs(regp)
1425: struct reg *regp;
1426: {
1427: int i;
1428:
1429: for (i = 0; i < 32; i++)
1430: printf("R%d:\t0x%016lx%s", i, regp->r_regs[i],
1431: i & 1 ? "\n" : "\t");
1432: }
1433:
1434: void
1435: regdump(framep)
1436: struct trapframe *framep;
1437: {
1438: struct reg reg;
1439:
1440: frametoreg(framep, ®);
1441: reg.r_regs[R_SP] = alpha_pal_rdusp();
1442:
1443: printf("REGISTERS:\n");
1444: printregs(®);
1445: }
1446:
1447: #ifdef DEBUG
1448: int sigdebug = 0;
1449: int sigpid = 0;
1450: #define SDB_FOLLOW 0x01
1451: #define SDB_KSTACK 0x02
1452: #endif
1453:
1454: /*
1455: * Send an interrupt to process.
1456: */
1457: void
1458: sendsig(catcher, sig, mask, code, type, val)
1459: sig_t catcher;
1460: int sig, mask;
1461: u_long code;
1462: int type;
1463: union sigval val;
1464: {
1465: struct proc *p = curproc;
1466: struct sigcontext *scp, ksc;
1467: struct trapframe *frame;
1468: struct sigacts *psp = p->p_sigacts;
1469: int oonstack, fsize, rndfsize, kscsize;
1470: siginfo_t *sip, ksi;
1471:
1472: frame = p->p_md.md_tf;
1473: oonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
1474: fsize = sizeof ksc;
1475: rndfsize = ((fsize + 15) / 16) * 16;
1476: kscsize = rndfsize;
1477: if (psp->ps_siginfo & sigmask(sig)) {
1478: fsize += sizeof ksi;
1479: rndfsize = ((fsize + 15) / 16) * 16;
1480: }
1481:
1482: /*
1483: * Allocate and validate space for the signal handler
1484: * context. Note that if the stack is in P0 space, the
1485: * call to uvm_grow() is a nop, and the useracc() check
1486: * will fail if the process has not already allocated
1487: * the space with a `brk'.
1488: */
1489: if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack &&
1490: (psp->ps_sigonstack & sigmask(sig))) {
1491: scp = (struct sigcontext *)(psp->ps_sigstk.ss_sp +
1492: psp->ps_sigstk.ss_size - rndfsize);
1493: psp->ps_sigstk.ss_flags |= SS_ONSTACK;
1494: } else
1495: scp = (struct sigcontext *)(alpha_pal_rdusp() - rndfsize);
1496: if ((u_long)scp <= USRSTACK - ctob(p->p_vmspace->vm_ssize))
1497: (void)uvm_grow(p, (u_long)scp);
1498: #ifdef DEBUG
1499: if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
1500: printf("sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid,
1501: sig, &oonstack, scp);
1502: #endif
1503:
1504: /*
1505: * Build the signal context to be used by sigreturn.
1506: */
1507: ksc.sc_onstack = oonstack;
1508: ksc.sc_mask = mask;
1509: ksc.sc_pc = frame->tf_regs[FRAME_PC];
1510: ksc.sc_ps = frame->tf_regs[FRAME_PS];
1511:
1512: /* copy the registers. */
1513: frametoreg(frame, (struct reg *)ksc.sc_regs);
1514: ksc.sc_regs[R_ZERO] = 0xACEDBADE; /* magic number */
1515: ksc.sc_regs[R_SP] = alpha_pal_rdusp();
1516:
1517: /* save the floating-point state, if necessary, then copy it. */
1518: if (p->p_addr->u_pcb.pcb_fpcpu != NULL)
1519: fpusave_proc(p, 1);
1520: ksc.sc_ownedfp = p->p_md.md_flags & MDP_FPUSED;
1521: memcpy((struct fpreg *)ksc.sc_fpregs, &p->p_addr->u_pcb.pcb_fp,
1522: sizeof(struct fpreg));
1523: #ifndef NO_IEEE
1524: ksc.sc_fp_control = alpha_read_fp_c(p);
1525: #else
1526: ksc.sc_fp_control = 0;
1527: #endif
1528: memset(ksc.sc_reserved, 0, sizeof ksc.sc_reserved); /* XXX */
1529: memset(ksc.sc_xxx, 0, sizeof ksc.sc_xxx); /* XXX */
1530:
1531: #ifdef COMPAT_OSF1
1532: /*
1533: * XXX Create an OSF/1-style sigcontext and associated goo.
1534: */
1535: #endif
1536:
1537: if (psp->ps_siginfo & sigmask(sig)) {
1538: initsiginfo(&ksi, sig, code, type, val);
1539: sip = (void *)scp + kscsize;
1540: if (copyout((caddr_t)&ksi, (caddr_t)sip, fsize - kscsize) != 0)
1541: goto trash;
1542: } else
1543: sip = NULL;
1544:
1545: /*
1546: * copy the frame out to userland.
1547: */
1548: if (copyout((caddr_t)&ksc, (caddr_t)scp, kscsize) != 0) {
1549: trash:
1550: #ifdef DEBUG
1551: if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
1552: printf("sendsig(%d): copyout failed on sig %d\n",
1553: p->p_pid, sig);
1554: #endif
1555: /*
1556: * Process has trashed its stack; give it an illegal
1557: * instruction to halt it in its tracks.
1558: */
1559: sigexit(p, SIGILL);
1560: /* NOTREACHED */
1561: }
1562: #ifdef DEBUG
1563: if (sigdebug & SDB_FOLLOW)
1564: printf("sendsig(%d): sig %d scp %p code %lx\n", p->p_pid, sig,
1565: scp, code);
1566: #endif
1567:
1568: /*
1569: * Set up the registers to return to sigcode.
1570: */
1571: frame->tf_regs[FRAME_PC] = p->p_sigcode;
1572: frame->tf_regs[FRAME_A0] = sig;
1573: frame->tf_regs[FRAME_A1] = (u_int64_t)sip;
1574: frame->tf_regs[FRAME_A2] = (u_int64_t)scp;
1575: frame->tf_regs[FRAME_T12] = (u_int64_t)catcher; /* t12 is pv */
1576: alpha_pal_wrusp((unsigned long)scp);
1577:
1578: #ifdef DEBUG
1579: if (sigdebug & SDB_FOLLOW)
1580: printf("sendsig(%d): pc %lx, catcher %lx\n", p->p_pid,
1581: frame->tf_regs[FRAME_PC], frame->tf_regs[FRAME_A3]);
1582: if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
1583: printf("sendsig(%d): sig %d returns\n",
1584: p->p_pid, sig);
1585: #endif
1586: }
1587:
1588: /*
1589: * System call to cleanup state after a signal
1590: * has been taken. Reset signal mask and
1591: * stack state from context left by sendsig (above).
1592: * Return to previous pc and psl as specified by
1593: * context left by sendsig. Check carefully to
1594: * make sure that the user has not modified the
1595: * psl to gain improper privileges or to cause
1596: * a machine fault.
1597: */
1598: /* ARGSUSED */
1599: int
1600: sys_sigreturn(p, v, retval)
1601: struct proc *p;
1602: void *v;
1603: register_t *retval;
1604: {
1605: struct sys_sigreturn_args /* {
1606: syscallarg(struct sigcontext *) sigcntxp;
1607: } */ *uap = v;
1608: struct sigcontext ksc;
1609: #ifdef DEBUG
1610: struct sigcontext *scp;
1611: #endif
1612: int error;
1613:
1614: #ifdef DEBUG
1615: if (sigdebug & SDB_FOLLOW)
1616: printf("sigreturn: pid %d, scp %p\n", p->p_pid, scp);
1617: #endif
1618:
1619: /*
1620: * Test and fetch the context structure.
1621: * We grab it all at once for speed.
1622: */
1623: if ((error = copyin(SCARG(uap, sigcntxp), &ksc, sizeof(ksc))) != 0)
1624: return (error);
1625:
1626: if (ksc.sc_regs[R_ZERO] != 0xACEDBADE) /* magic number */
1627: return (EINVAL);
1628: /*
1629: * Restore the user-supplied information
1630: */
1631: if (ksc.sc_onstack)
1632: p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
1633: else
1634: p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
1635: p->p_sigmask = ksc.sc_mask &~ sigcantmask;
1636:
1637: p->p_md.md_tf->tf_regs[FRAME_PC] = ksc.sc_pc;
1638: p->p_md.md_tf->tf_regs[FRAME_PS] =
1639: (ksc.sc_ps | ALPHA_PSL_USERSET) & ~ALPHA_PSL_USERCLR;
1640:
1641: regtoframe((struct reg *)ksc.sc_regs, p->p_md.md_tf);
1642: alpha_pal_wrusp(ksc.sc_regs[R_SP]);
1643:
1644: /* XXX ksc.sc_ownedfp ? */
1645: if (p->p_addr->u_pcb.pcb_fpcpu != NULL)
1646: fpusave_proc(p, 0);
1647: memcpy(&p->p_addr->u_pcb.pcb_fp, (struct fpreg *)ksc.sc_fpregs,
1648: sizeof(struct fpreg));
1649: #ifndef NO_IEEE
1650: p->p_addr->u_pcb.pcb_fp.fpr_cr = ksc.sc_fpcr;
1651: p->p_md.md_flags = ksc.sc_fp_control & MDP_FP_C;
1652: #endif
1653:
1654: #ifdef DEBUG
1655: if (sigdebug & SDB_FOLLOW)
1656: printf("sigreturn(%d): returns\n", p->p_pid);
1657: #endif
1658: return (EJUSTRETURN);
1659: }
1660:
1661: /*
1662: * machine dependent system variables.
1663: */
1664: int
1665: cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
1666: int *name;
1667: u_int namelen;
1668: void *oldp;
1669: size_t *oldlenp;
1670: void *newp;
1671: size_t newlen;
1672: struct proc *p;
1673: {
1674: dev_t consdev;
1675:
1676: if (name[0] != CPU_CHIPSET && namelen != 1)
1677: return (ENOTDIR); /* overloaded */
1678:
1679: switch (name[0]) {
1680: case CPU_CONSDEV:
1681: if (cn_tab != NULL)
1682: consdev = cn_tab->cn_dev;
1683: else
1684: consdev = NODEV;
1685: return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev,
1686: sizeof consdev));
1687:
1688: case CPU_ROOT_DEVICE:
1689: return (sysctl_rdstring(oldp, oldlenp, newp,
1690: root_device));
1691: #ifndef SMALL_KERNEL
1692: case CPU_UNALIGNED_PRINT:
1693: return (sysctl_int(oldp, oldlenp, newp, newlen,
1694: &alpha_unaligned_print));
1695:
1696: case CPU_UNALIGNED_FIX:
1697: return (sysctl_int(oldp, oldlenp, newp, newlen,
1698: &alpha_unaligned_fix));
1699:
1700: case CPU_UNALIGNED_SIGBUS:
1701: return (sysctl_int(oldp, oldlenp, newp, newlen,
1702: &alpha_unaligned_sigbus));
1703:
1704: case CPU_BOOTED_KERNEL:
1705: return (sysctl_rdstring(oldp, oldlenp, newp,
1706: bootinfo.booted_kernel));
1707:
1708: case CPU_CHIPSET:
1709: return (alpha_sysctl_chipset(name + 1, namelen - 1, oldp,
1710: oldlenp));
1711: #endif /* SMALL_KERNEL */
1712:
1713: #ifndef NO_IEEE
1714: case CPU_FP_SYNC_COMPLETE:
1715: return (sysctl_int(oldp, oldlenp, newp, newlen,
1716: &alpha_fp_sync_complete));
1717: #endif
1718: case CPU_ALLOWAPERTURE:
1719: #ifdef APERTURE
1720: if (securelevel > 0)
1721: return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
1722: &allowaperture));
1723: else
1724: return (sysctl_int(oldp, oldlenp, newp, newlen,
1725: &allowaperture));
1726: #else
1727: return (sysctl_rdint(oldp, oldlenp, newp, 0));
1728: #endif
1729: default:
1730: return (EOPNOTSUPP);
1731: }
1732: /* NOTREACHED */
1733: }
1734:
1735: /*
1736: * Set registers on exec.
1737: */
1738: void
1739: setregs(p, pack, stack, retval)
1740: register struct proc *p;
1741: struct exec_package *pack;
1742: u_long stack;
1743: register_t *retval;
1744: {
1745: struct trapframe *tfp = p->p_md.md_tf;
1746: #ifdef DEBUG
1747: int i;
1748: #endif
1749:
1750: #ifdef DEBUG
1751: /*
1752: * Crash and dump, if the user requested it.
1753: */
1754: if (boothowto & RB_DUMP)
1755: panic("crash requested by boot flags");
1756: #endif
1757:
1758: #ifdef DEBUG
1759: for (i = 0; i < FRAME_SIZE; i++)
1760: tfp->tf_regs[i] = 0xbabefacedeadbeef;
1761: #else
1762: bzero(tfp->tf_regs, FRAME_SIZE * sizeof tfp->tf_regs[0]);
1763: #endif
1764: bzero(&p->p_addr->u_pcb.pcb_fp, sizeof p->p_addr->u_pcb.pcb_fp);
1765: alpha_pal_wrusp(stack);
1766: tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET;
1767: tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3;
1768:
1769: tfp->tf_regs[FRAME_A0] = stack;
1770: /* a1 and a2 already zeroed */
1771: tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */
1772:
1773: p->p_md.md_flags &= ~MDP_FPUSED;
1774: #ifndef NO_IEEE
1775: if (__predict_true((p->p_md.md_flags & IEEE_INHERIT) == 0)) {
1776: p->p_md.md_flags &= ~MDP_FP_C;
1777: p->p_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN);
1778: }
1779: #endif
1780: if (p->p_addr->u_pcb.pcb_fpcpu != NULL)
1781: fpusave_proc(p, 0);
1782:
1783: retval[1] = 0;
1784: }
1785:
1786: /*
1787: * Release the FPU.
1788: */
1789: void
1790: fpusave_cpu(struct cpu_info *ci, int save)
1791: {
1792: struct proc *p;
1793:
1794: KDASSERT(ci == curcpu());
1795:
1796: #if defined(MULTIPROCESSOR)
1797: atomic_setbits_ulong(&ci->ci_flags, CPUF_FPUSAVE);
1798: #endif
1799:
1800: p = ci->ci_fpcurproc;
1801: if (p == NULL)
1802: goto out;
1803:
1804: if (save) {
1805: alpha_pal_wrfen(1);
1806: savefpstate(&p->p_addr->u_pcb.pcb_fp);
1807: }
1808:
1809: alpha_pal_wrfen(0);
1810:
1811: p->p_addr->u_pcb.pcb_fpcpu = NULL;
1812: ci->ci_fpcurproc = NULL;
1813:
1814: out:
1815: #if defined(MULTIPROCESSOR)
1816: atomic_clearbits_ulong(&ci->ci_flags, CPUF_FPUSAVE);
1817: #endif
1818: return;
1819: }
1820:
1821: /*
1822: * Synchronize FP state for this process.
1823: */
1824: void
1825: fpusave_proc(struct proc *p, int save)
1826: {
1827: struct cpu_info *ci = curcpu();
1828: struct cpu_info *oci;
1829: #if defined(MULTIPROCESSOR)
1830: u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU;
1831: int spincount;
1832: #endif
1833:
1834: KDASSERT(p->p_addr != NULL);
1835:
1836: oci = p->p_addr->u_pcb.pcb_fpcpu;
1837: if (oci == NULL) {
1838: return;
1839: }
1840:
1841: #if defined(MULTIPROCESSOR)
1842: if (oci == ci) {
1843: KASSERT(ci->ci_fpcurproc == p);
1844: fpusave_cpu(ci, save);
1845: return;
1846: }
1847:
1848: KASSERT(oci->ci_fpcurproc == p);
1849: alpha_send_ipi(oci->ci_cpuid, ipi);
1850:
1851: spincount = 0;
1852: while (p->p_addr->u_pcb.pcb_fpcpu != NULL) {
1853: spincount++;
1854: delay(1000); /* XXX */
1855: if (spincount > 10000)
1856: panic("fpsave ipi didn't");
1857: }
1858: #else
1859: KASSERT(ci->ci_fpcurproc == p);
1860: fpusave_cpu(ci, save);
1861: #endif /* MULTIPROCESSOR */
1862: }
1863:
1864: int
1865: spl0()
1866: {
1867:
1868: if (ssir) {
1869: (void) alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT);
1870: softintr_dispatch();
1871: }
1872:
1873: return (alpha_pal_swpipl(ALPHA_PSL_IPL_0));
1874: }
1875:
1876: /*
1877: * The following primitives manipulate the run queues. _whichqs tells which
1878: * of the 32 queues _qs have processes in them. Setrunqueue puts processes
1879: * into queues, Remrunqueue removes them from queues. The running process is
1880: * on no queue, other processes are on a queue related to p->p_priority,
1881: * divided by 4 actually to shrink the 0-127 range of priorities into the 32
1882: * available queues.
1883: */
1884: /*
1885: * setrunqueue(p)
1886: * proc *p;
1887: *
1888: * Call should be made at splclock(), and p->p_stat should be SRUN.
1889: */
1890:
1891: /* XXXART - grmble */
1892: #define sched_qs qs
1893: #define sched_whichqs whichqs
1894:
1895: void
1896: setrunqueue(p)
1897: struct proc *p;
1898: {
1899: int bit;
1900:
1901: /* firewall: p->p_back must be NULL */
1902: if (p->p_back != NULL)
1903: panic("setrunqueue");
1904:
1905: bit = p->p_priority >> 2;
1906: sched_whichqs |= (1 << bit);
1907: p->p_forw = (struct proc *)&sched_qs[bit];
1908: p->p_back = sched_qs[bit].ph_rlink;
1909: p->p_back->p_forw = p;
1910: sched_qs[bit].ph_rlink = p;
1911: }
1912:
1913: /*
1914: * remrunqueue(p)
1915: *
1916: * Call should be made at splclock().
1917: */
1918: void
1919: remrunqueue(p)
1920: struct proc *p;
1921: {
1922: int bit;
1923:
1924: bit = p->p_priority >> 2;
1925: if ((sched_whichqs & (1 << bit)) == 0)
1926: panic("remrunqueue");
1927:
1928: p->p_back->p_forw = p->p_forw;
1929: p->p_forw->p_back = p->p_back;
1930: p->p_back = NULL; /* for firewall checking. */
1931:
1932: if ((struct proc *)&sched_qs[bit] == sched_qs[bit].ph_link)
1933: sched_whichqs &= ~(1 << bit);
1934: }
1935:
1936: /*
1937: * Wait "n" microseconds.
1938: */
1939: void
1940: delay(n)
1941: unsigned long n;
1942: {
1943: unsigned long pcc0, pcc1, curcycle, cycles, usec;
1944:
1945: if (n == 0)
1946: return;
1947:
1948: pcc0 = alpha_rpcc() & 0xffffffffUL;
1949: cycles = 0;
1950: usec = 0;
1951:
1952: while (usec <= n) {
1953: /*
1954: * Get the next CPU cycle count - assumes that we can not
1955: * have had more than one 32 bit overflow.
1956: */
1957: pcc1 = alpha_rpcc() & 0xffffffffUL;
1958: if (pcc1 < pcc0)
1959: curcycle = (pcc1 + 0x100000000UL) - pcc0;
1960: else
1961: curcycle = pcc1 - pcc0;
1962:
1963: /*
1964: * We now have the number of processor cycles since we
1965: * last checked. Add the current cycle count to the
1966: * running total. If it's over cycles_per_usec, increment
1967: * the usec counter.
1968: */
1969: cycles += curcycle;
1970: while (cycles > cycles_per_usec) {
1971: usec++;
1972: cycles -= cycles_per_usec;
1973: }
1974: pcc0 = pcc1;
1975: }
1976: }
1977:
1978: #if defined(COMPAT_OSF1)
1979: void cpu_exec_ecoff_setregs(struct proc *, struct exec_package *,
1980: u_long, register_t *);
1981:
1982: void
1983: cpu_exec_ecoff_setregs(p, epp, stack, retval)
1984: struct proc *p;
1985: struct exec_package *epp;
1986: u_long stack;
1987: register_t *retval;
1988: {
1989: struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr;
1990:
1991: setregs(p, epp, stack, retval);
1992: p->p_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value;
1993: }
1994:
1995: /*
1996: * cpu_exec_ecoff_hook():
1997: * cpu-dependent ECOFF format hook for execve().
1998: *
1999: * Do any machine-dependent diddling of the exec package when doing ECOFF.
2000: *
2001: */
2002: int
2003: cpu_exec_ecoff_hook(p, epp)
2004: struct proc *p;
2005: struct exec_package *epp;
2006: {
2007: struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr;
2008: extern struct emul emul_native;
2009: int error;
2010: extern int osf1_exec_ecoff_hook(struct proc *, struct exec_package *);
2011:
2012: switch (execp->f.f_magic) {
2013: #ifdef COMPAT_OSF1
2014: case ECOFF_MAGIC_ALPHA:
2015: error = osf1_exec_ecoff_hook(p, epp);
2016: break;
2017: #endif
2018:
2019: case ECOFF_MAGIC_NATIVE_ALPHA:
2020: epp->ep_emul = &emul_native;
2021: error = 0;
2022: break;
2023:
2024: default:
2025: error = ENOEXEC;
2026: }
2027: return (error);
2028: }
2029: #endif
2030:
2031: int
2032: alpha_pa_access(pa)
2033: u_long pa;
2034: {
2035: int i;
2036:
2037: for (i = 0; i < mem_cluster_cnt; i++) {
2038: if (pa < mem_clusters[i].start)
2039: continue;
2040: if ((pa - mem_clusters[i].start) >=
2041: (mem_clusters[i].size & ~PAGE_MASK))
2042: continue;
2043: return (mem_clusters[i].size & PAGE_MASK); /* prot */
2044: }
2045:
2046: /*
2047: * Address is not a memory address. If we're secure, disallow
2048: * access. Otherwise, grant read/write.
2049: */
2050: if (securelevel > 0)
2051: return (VM_PROT_NONE);
2052: else
2053: return (VM_PROT_READ | VM_PROT_WRITE);
2054: }
2055:
2056: /* XXX XXX BEGIN XXX XXX */
2057: paddr_t alpha_XXX_dmamap_or; /* XXX */
2058: /* XXX */
2059: paddr_t /* XXX */
2060: alpha_XXX_dmamap(v) /* XXX */
2061: vaddr_t v; /* XXX */
2062: { /* XXX */
2063: /* XXX */
2064: return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */
2065: } /* XXX */
2066: /* XXX XXX END XXX XXX */
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