kernel: Make SMP support default (and non-optional).
[dragonfly.git] / sys / platform / vkernel64 / platform / init.c
CommitLineData
da673940
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1/*
2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
da673940
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33 */
34
35#include <sys/types.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/stat.h>
39#include <sys/mman.h>
40#include <sys/cons.h>
41#include <sys/random.h>
42#include <sys/vkernel.h>
43#include <sys/tls.h>
44#include <sys/reboot.h>
45#include <sys/proc.h>
46#include <sys/msgbuf.h>
47#include <sys/vmspace.h>
48#include <sys/socket.h>
49#include <sys/sockio.h>
50#include <sys/sysctl.h>
51#include <sys/un.h>
52#include <vm/vm_page.h>
bf7c5253 53#include <vm/vm_map.h>
e130cdcb 54#include <sys/mplock2.h>
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55
56#include <machine/cpu.h>
57#include <machine/globaldata.h>
58#include <machine/tls.h>
59#include <machine/md_var.h>
60#include <machine/vmparam.h>
61#include <cpu/specialreg.h>
62
63#include <net/if.h>
64#include <net/if_arp.h>
65#include <net/ethernet.h>
66#include <net/bridge/if_bridgevar.h>
67#include <netinet/in.h>
68#include <arpa/inet.h>
69
70#include <stdio.h>
71#include <stdlib.h>
72#include <stdarg.h>
278c4e67 73#include <stdbool.h>
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74#include <unistd.h>
75#include <fcntl.h>
76#include <string.h>
77#include <err.h>
78#include <errno.h>
79#include <assert.h>
278c4e67 80#include <sysexits.h>
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81
82vm_paddr_t phys_avail[16];
83vm_paddr_t Maxmem;
84vm_paddr_t Maxmem_bytes;
39d69dae 85long physmem;
da673940
JG
86int MemImageFd = -1;
87struct vkdisk_info DiskInfo[VKDISK_MAX];
88int DiskNum;
89struct vknetif_info NetifInfo[VKNETIF_MAX];
90int NetifNum;
91char *pid_file;
92vm_offset_t KvaStart;
93vm_offset_t KvaEnd;
94vm_offset_t KvaSize;
95vm_offset_t virtual_start;
96vm_offset_t virtual_end;
0e6594a8
SW
97vm_offset_t virtual2_start;
98vm_offset_t virtual2_end;
da673940
JG
99vm_offset_t kernel_vm_end;
100vm_offset_t crashdumpmap;
101vm_offset_t clean_sva;
102vm_offset_t clean_eva;
103struct msgbuf *msgbufp;
104caddr_t ptvmmap;
105vpte_t *KernelPTD;
106vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
107void *dmap_min_address;
108u_int cpu_feature; /* XXX */
109int tsc_present;
110int64_t tsc_frequency;
111int optcpus; /* number of cpus - see mp_start() */
112int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */
113int real_ncpus; /* number of real CPUs */
114int next_cpu; /* next real CPU to lock a virtual CPU to */
9bea6114
MC
115int vkernel_b_arg; /* -b argument - no of logical CPU bits - only SMP */
116int vkernel_B_arg; /* -B argument - no of core bits - only SMP */
da673940
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117
118struct privatespace *CPU_prvspace;
119
120static struct trapframe proc0_tf;
121static void *proc0paddr;
122
123static void init_sys_memory(char *imageFile);
124static void init_kern_memory(void);
125static void init_globaldata(void);
126static void init_vkernel(void);
127static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type);
128static void init_netif(char *netifExp[], int netifFileNum);
278c4e67
SG
129static void writepid(void);
130static void cleanpid(void);
da673940 131static int unix_connect(const char *path);
278c4e67
SG
132static void usage_err(const char *ctl, ...);
133static void usage_help(_Bool);
0f85165c 134static void init_locks(void);
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135
136static int save_ac;
137static char **save_av;
138
139/*
140 * Kernel startup for virtual kernels - standard main()
141 */
142int
143main(int ac, char **av)
144{
145 char *memImageFile = NULL;
146 char *netifFile[VKNETIF_MAX];
147 char *diskFile[VKDISK_MAX];
148 char *cdFile[VKDISK_MAX];
149 char *suffix;
150 char *endp;
974f8ffe 151 char *tmp;
9bea6114 152 char *tok;
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153 int netifFileNum = 0;
154 int diskFileNum = 0;
155 int cdFileNum = 0;
156 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */
157 int c;
158 int i;
159 int j;
160 int n;
161 int isq;
974f8ffe
AHJ
162 int pos;
163 int eflag;
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164 int real_vkernel_enable;
165 int supports_sse;
166 size_t vsize;
974f8ffe
AHJ
167 size_t kenv_size;
168 size_t kenv_size2;
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169
170 save_ac = ac;
171 save_av = av;
974f8ffe
AHJ
172 eflag = 0;
173 pos = 0;
174 kenv_size = 0;
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175
176 /*
177 * Process options
178 */
179 kernel_mem_readonly = 1;
da673940 180 optcpus = 2;
9bea6114
MC
181 vkernel_b_arg = 0;
182 vkernel_B_arg = 0;
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JG
183 lwp_cpu_lock = LCL_NONE;
184
185 real_vkernel_enable = 0;
186 vsize = sizeof(real_vkernel_enable);
187 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
188
189 if (real_vkernel_enable == 0) {
190 errx(1, "vm.vkernel_enable is 0, must be set "
191 "to 1 to execute a vkernel!");
192 }
193
194 real_ncpus = 1;
195 vsize = sizeof(real_ncpus);
196 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
197
278c4e67
SG
198 if (ac < 2)
199 usage_help(false);
200
9bea6114 201 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:Ub:B:")) != -1) {
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202 switch(c) {
203 case 'e':
204 /*
205 * name=value:name=value:name=value...
206 * name="value"...
207 *
208 * Allow values to be quoted but note that shells
209 * may remove the quotes, so using this feature
210 * to embed colons may require a backslash.
211 */
212 n = strlen(optarg);
213 isq = 0;
974f8ffe
AHJ
214
215 if (eflag == 0) {
216 kenv_size = n + 2;
217 kern_envp = malloc(kenv_size);
218 if (kern_envp == NULL)
219 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size);
220 } else {
221 kenv_size2 = kenv_size + n + 1;
222 pos = kenv_size - 1;
223 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL)
224 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2);
225 kern_envp = tmp;
226 kenv_size = kenv_size2;
227 }
228
229 for (i = 0, j = pos; i < n; ++i) {
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230 if (optarg[i] == '"')
231 isq ^= 1;
232 else if (optarg[i] == '\'')
233 isq ^= 2;
234 else if (isq == 0 && optarg[i] == ':')
235 kern_envp[j++] = 0;
236 else
237 kern_envp[j++] = optarg[i];
238 }
239 kern_envp[j++] = 0;
240 kern_envp[j++] = 0;
974f8ffe 241 eflag++;
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242 break;
243 case 's':
244 boothowto |= RB_SINGLE;
245 break;
246 case 'v':
247 bootverbose = 1;
248 break;
249 case 'i':
250 memImageFile = optarg;
251 break;
252 case 'I':
253 if (netifFileNum < VKNETIF_MAX)
254 netifFile[netifFileNum++] = strdup(optarg);
255 break;
256 case 'r':
257 if (bootOnDisk < 0)
258 bootOnDisk = 1;
259 if (diskFileNum + cdFileNum < VKDISK_MAX)
260 diskFile[diskFileNum++] = strdup(optarg);
261 break;
262 case 'c':
263 if (bootOnDisk < 0)
264 bootOnDisk = 0;
265 if (diskFileNum + cdFileNum < VKDISK_MAX)
266 cdFile[cdFileNum++] = strdup(optarg);
267 break;
268 case 'm':
269 Maxmem_bytes = strtoull(optarg, &suffix, 0);
270 if (suffix) {
271 switch(*suffix) {
272 case 'g':
273 case 'G':
274 Maxmem_bytes <<= 30;
275 break;
276 case 'm':
277 case 'M':
278 Maxmem_bytes <<= 20;
279 break;
280 case 'k':
281 case 'K':
282 Maxmem_bytes <<= 10;
283 break;
284 default:
285 Maxmem_bytes = 0;
278c4e67 286 usage_err("Bad maxmem option");
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287 /* NOT REACHED */
288 break;
289 }
290 }
291 break;
292 case 'l':
293 next_cpu = -1;
294 if (strncmp("map", optarg, 3) == 0) {
295 lwp_cpu_lock = LCL_PER_CPU;
296 if (optarg[3] == ',') {
297 next_cpu = strtol(optarg+4, &endp, 0);
298 if (*endp != '\0')
278c4e67 299 usage_err("Bad target CPU number at '%s'", endp);
da673940
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300 } else {
301 next_cpu = 0;
302 }
303 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
278c4e67 304 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
da673940
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305 } else if (strncmp("any", optarg, 3) == 0) {
306 lwp_cpu_lock = LCL_NONE;
307 } else {
308 lwp_cpu_lock = LCL_SINGLE_CPU;
309 next_cpu = strtol(optarg, &endp, 0);
310 if (*endp != '\0')
278c4e67 311 usage_err("Bad target CPU number at '%s'", endp);
da673940 312 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
278c4e67 313 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
da673940
JG
314 }
315 break;
316 case 'n':
317 /*
318 * This value is set up by mp_start(), don't just
319 * set ncpus here.
320 */
9bea6114 321 tok = strtok(optarg, ":");
9bea6114 322 optcpus = strtol(tok, NULL, 0);
da673940 323 if (optcpus < 1 || optcpus > MAXCPU)
278c4e67 324 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU);
9bea6114
MC
325
326 /* :lbits argument */
327 tok = strtok(NULL, ":");
328 if (tok != NULL) {
329 vkernel_b_arg = strtol(tok, NULL, 0);
330
331 /* :cbits argument */
332 tok = strtok(NULL, ":");
333 if (tok != NULL) {
334 vkernel_B_arg = strtol(tok, NULL, 0);
335 }
336
337 }
8619df8e 338 break;
da673940
JG
339 case 'p':
340 pid_file = optarg;
341 break;
342 case 'U':
343 kernel_mem_readonly = 0;
344 break;
278c4e67
SG
345 case 'h':
346 usage_help(true);
347 break;
278c4e67
SG
348 default:
349 usage_help(false);
da673940
JG
350 }
351 }
352
353 writepid();
354 cpu_disable_intr();
355 init_sys_memory(memImageFile);
356 init_kern_memory();
357 init_globaldata();
358 init_vkernel();
359 setrealcpu();
360 init_kqueue();
361
08771751
VS
362 vmm_guest = 1;
363
da673940
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364 /*
365 * Check TSC
366 */
367 vsize = sizeof(tsc_present);
368 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
369 vsize = sizeof(tsc_frequency);
370 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
371 if (tsc_present)
372 cpu_feature |= CPUID_TSC;
373
374 /*
375 * Check SSE
376 */
377 vsize = sizeof(supports_sse);
378 supports_sse = 0;
379 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
380 init_fpu(supports_sse);
381 if (supports_sse)
382 cpu_feature |= CPUID_SSE | CPUID_FXSR;
383
384 /*
385 * We boot from the first installed disk.
386 */
387 if (bootOnDisk == 1) {
388 init_disk(diskFile, diskFileNum, VKD_DISK);
389 init_disk(cdFile, cdFileNum, VKD_CD);
390 } else {
391 init_disk(cdFile, cdFileNum, VKD_CD);
392 init_disk(diskFile, diskFileNum, VKD_DISK);
393 }
394 init_netif(netifFile, netifFileNum);
395 init_exceptions();
396 mi_startup();
397 /* NOT REACHED */
278c4e67 398 exit(EX_SOFTWARE);
da673940
JG
399}
400
401/*
402 * Initialize system memory. This is the virtual kernel's 'RAM'.
403 */
404static
405void
406init_sys_memory(char *imageFile)
407{
408 struct stat st;
409 int i;
410 int fd;
411
412 /*
413 * Figure out the system memory image size. If an image file was
414 * specified and -m was not specified, use the image file's size.
415 */
da673940
JG
416 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
417 Maxmem_bytes = (vm_paddr_t)st.st_size;
418 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
419 Maxmem_bytes == 0) {
376264e3 420 errx(1, "Cannot create new memory file %s unless "
da673940
JG
421 "system memory size is specified with -m",
422 imageFile);
423 /* NOT REACHED */
424 }
425
426 /*
427 * Maxmem must be known at this time
428 */
242e00e6
AHJ
429 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
430 errx(1, "Bad maxmem specification: 64MB minimum, "
da673940
JG
431 "multiples of %dMB only",
432 SEG_SIZE / 1024 / 1024);
433 /* NOT REACHED */
434 }
435
436 /*
437 * Generate an image file name if necessary, then open/create the
438 * file exclusively locked. Do not allow multiple virtual kernels
439 * to use the same image file.
bc3cc25e
MD
440 *
441 * Don't iterate through a million files if we do not have write
442 * access to the directory, stop if our open() failed on a
443 * non-existant file. Otherwise opens can fail for any number
da673940
JG
444 */
445 if (imageFile == NULL) {
446 for (i = 0; i < 1000000; ++i) {
447 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
448 fd = open(imageFile,
449 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
bc3cc25e 450 if (fd < 0 && stat(imageFile, &st) == 0) {
da673940
JG
451 free(imageFile);
452 continue;
453 }
454 break;
455 }
456 } else {
457 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
458 }
459 fprintf(stderr, "Using memory file: %s\n", imageFile);
460 if (fd < 0 || fstat(fd, &st) < 0) {
461 err(1, "Unable to open/create %s", imageFile);
462 /* NOT REACHED */
463 }
464
465 /*
b72e51d1
MD
466 * Truncate or extend the file as necessary. Clean out the contents
467 * of the file, we want it to be full of holes so we don't waste
468 * time reading in data from an old file that we no longer care
469 * about.
da673940 470 */
b72e51d1
MD
471 ftruncate(fd, 0);
472 ftruncate(fd, Maxmem_bytes);
da673940 473
da673940
JG
474 MemImageFd = fd;
475 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
9f90716f 476 physmem = Maxmem;
da673940
JG
477}
478
479/*
480 * Initialize kernel memory. This reserves kernel virtual memory by using
481 * MAP_VPAGETABLE
482 */
483
484static
485void
486init_kern_memory(void)
487{
488 void *base;
489 void *try;
da673940
JG
490 char dummy;
491 char *topofstack = &dummy;
da673940
JG
492 int i;
493 void *firstfree;
494
495 /*
496 * Memory map our kernel virtual memory space. Note that the
497 * kernel image itself is not made part of this memory for the
498 * moment.
499 *
500 * The memory map must be segment-aligned so we can properly
501 * offset KernelPTD.
502 *
503 * If the system kernel has a different MAXDSIZ, it might not
504 * be possible to map kernel memory in its prefered location.
505 * Try a number of different locations.
506 */
507 try = (void *)(512UL << 30);
508 base = NULL;
509 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
510 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
511 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
2c2e847c 512 MemImageFd, (off_t)try);
da673940
JG
513 if (base == try)
514 break;
515 if (base != MAP_FAILED)
516 munmap(base, KERNEL_KVA_SIZE);
517 try = (char *)try + (512UL << 30);
518 }
519 if (base != try) {
520 err(1, "Unable to mmap() kernel virtual memory!");
521 /* NOT REACHED */
522 }
523 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
524 KvaStart = (vm_offset_t)base;
525 KvaSize = KERNEL_KVA_SIZE;
526 KvaEnd = KvaStart + KvaSize;
d4f5f27c
MD
527
528 /* cannot use kprintf yet */
da673940
JG
529 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
530
531 /* MAP_FILE? */
532 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE,
533 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED,
534 MemImageFd, 0);
535 if (dmap_min_address == MAP_FAILED) {
536 err(1, "Unable to mmap() kernel DMAP region!");
537 /* NOT REACHED */
538 }
539
4090d6ff 540 firstfree = NULL;
2c2e847c 541 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base);
da673940
JG
542
543 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
544 0 | VPTE_R | VPTE_W | VPTE_V);
545
546 /*
547 * phys_avail[] represents unallocated physical memory. MI code
548 * will use phys_avail[] to create the vm_page array.
549 */
2c2e847c 550 phys_avail[0] = (vm_paddr_t)firstfree;
da673940
JG
551 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
552 phys_avail[1] = Maxmem_bytes;
553
554#if JGV
555 /*
556 * (virtual_start, virtual_end) represent unallocated kernel virtual
557 * memory. MI code will create kernel_map using these parameters.
558 */
559 virtual_start = KvaStart + (long)firstfree;
560 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
561 virtual_end = KvaStart + KERNEL_KVA_SIZE;
562#endif
563
564 /*
565 * pmap_growkernel() will set the correct value.
566 */
567 kernel_vm_end = 0;
568
569 /*
570 * Allocate space for process 0's UAREA.
571 */
572 proc0paddr = (void *)virtual_start;
573 for (i = 0; i < UPAGES; ++i) {
574 pmap_kenter_quick(virtual_start, phys_avail[0]);
575 virtual_start += PAGE_SIZE;
576 phys_avail[0] += PAGE_SIZE;
577 }
578
579 /*
580 * crashdumpmap
581 */
582 crashdumpmap = virtual_start;
583 virtual_start += MAXDUMPPGS * PAGE_SIZE;
584
585 /*
586 * msgbufp maps the system message buffer
587 */
588 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
589 msgbufp = (void *)virtual_start;
590 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
591 pmap_kenter_quick(virtual_start, phys_avail[0]);
592 virtual_start += PAGE_SIZE;
593 phys_avail[0] += PAGE_SIZE;
594 }
595 msgbufinit(msgbufp, MSGBUF_SIZE);
596
597 /*
598 * used by kern_memio for /dev/mem access
599 */
600 ptvmmap = (caddr_t)virtual_start;
601 virtual_start += PAGE_SIZE;
602
603 /*
604 * Bootstrap the kernel_pmap
605 */
606#if JGV
607 pmap_bootstrap();
608#endif
609}
610
611/*
612 * Map the per-cpu globaldata for cpu #0. Allocate the space using
613 * virtual_start and phys_avail[0]
614 */
615static
616void
617init_globaldata(void)
618{
619 int i;
620 vm_paddr_t pa;
621 vm_offset_t va;
622
623 /*
624 * Reserve enough KVA to cover possible cpus. This is a considerable
625 * amount of KVA since the privatespace structure includes two
626 * whole page table mappings.
627 */
628 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
629 CPU_prvspace = (void *)virtual_start;
630 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
631
632 /*
633 * Allocate enough physical memory to cover the mdglobaldata
634 * portion of the space and the idle stack and map the pages
635 * into KVA. For cpu #0 only.
636 */
637 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
638 pa = phys_avail[0];
639 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
640 pmap_kenter_quick(va, pa);
641 phys_avail[0] += PAGE_SIZE;
642 }
643 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
644 pa = phys_avail[0];
645 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
646 pmap_kenter_quick(va, pa);
647 phys_avail[0] += PAGE_SIZE;
648 }
649
650 /*
651 * Setup the %gs for cpu #0. The mycpu macro works after this
652 * point. Note that %fs is used by pthreads.
653 */
654 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace));
655}
656
0f85165c
AHJ
657
658/*
659 * Initialize pool tokens and other necessary locks
660 */
661static void
662init_locks(void)
663{
664
0f85165c
AHJ
665 /*
666 * Get the initial mplock with a count of 1 for the BSP.
667 * This uses a LOGICAL cpu ID, ie BSP == 0.
668 */
669 cpu_get_initial_mplock();
0f85165c
AHJ
670
671 /* our token pool needs to work early */
672 lwkt_token_pool_init();
673
674}
675
676
da673940
JG
677/*
678 * Initialize very low level systems including thread0, proc0, etc.
679 */
680static
681void
682init_vkernel(void)
683{
684 struct mdglobaldata *gd;
685
686 gd = &CPU_prvspace[0].mdglobaldata;
687 bzero(gd, sizeof(*gd));
688
689 gd->mi.gd_curthread = &thread0;
690 thread0.td_gd = &gd->mi;
691 ncpus = 1;
692 ncpus2 = 1; /* rounded down power of 2 */
693 ncpus_fit = 1; /* rounded up power of 2 */
694 /* ncpus2_mask and ncpus_fit_mask are 0 */
695 init_param1();
696 gd->mi.gd_prvspace = &CPU_prvspace[0];
697 mi_gdinit(&gd->mi, 0);
698 cpu_gdinit(gd, 0);
699 mi_proc0init(&gd->mi, proc0paddr);
700 lwp0.lwp_md.md_regs = &proc0_tf;
701
0f85165c 702 init_locks();
da673940
JG
703 cninit();
704 rand_initialize();
705#if 0 /* #ifdef DDB */
706 kdb_init();
707 if (boothowto & RB_KDB)
708 Debugger("Boot flags requested debugger");
709#endif
710 identcpu();
711#if 0
712 initializecpu(); /* Initialize CPU registers */
713#endif
714 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
715
716#if 0
717 /*
718 * Map the message buffer
719 */
720 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
721 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
722 msgbufinit(msgbufp, MSGBUF_SIZE);
723#endif
724#if 0
725 thread0.td_pcb_cr3 ... MMU
726 lwp0.lwp_md.md_regs = &proc0_tf;
727#endif
728}
729
730/*
731 * Filesystem image paths for the virtual kernel are optional.
732 * If specified they each should point to a disk image,
733 * the first of which will become the root disk.
734 *
735 * The virtual kernel caches data from our 'disk' just like a normal kernel,
736 * so we do not really want the real kernel to cache the data too. Use
737 * O_DIRECT to remove the duplication.
738 */
739static
740void
741init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
742{
743 int i;
744
745 if (diskFileNum == 0)
746 return;
747
748 for(i=0; i < diskFileNum; i++){
749 char *fname;
750 fname = diskExp[i];
751
752 if (fname == NULL) {
753 warnx("Invalid argument to '-r'");
754 continue;
755 }
756
757 if (DiskNum < VKDISK_MAX) {
758 struct stat st;
759 struct vkdisk_info* info = NULL;
760 int fd;
761 size_t l = 0;
762
763 if (type == VKD_DISK)
6882b7a5 764 fd = open(fname, O_RDWR|O_DIRECT, 0644);
da673940
JG
765 else
766 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
767 if (fd < 0 || fstat(fd, &st) < 0) {
da673940
JG
768 err(1, "Unable to open/create %s", fname);
769 /* NOT REACHED */
770 }
6882b7a5
MD
771 if (S_ISREG(st.st_mode)) {
772 if (flock(fd, LOCK_EX|LOCK_NB) < 0) {
773 errx(1, "Disk image %s is already "
774 "in use\n", fname);
775 /* NOT REACHED */
776 }
777 }
da673940
JG
778
779 info = &DiskInfo[DiskNum];
780 l = strlen(fname);
781
782 info->unit = i;
783 info->fd = fd;
784 info->type = type;
785 memcpy(info->fname, fname, l);
786
787 if (DiskNum == 0) {
788 if (type == VKD_CD) {
789 rootdevnames[0] = "cd9660:vcd0a";
790 } else if (type == VKD_DISK) {
791 rootdevnames[0] = "ufs:vkd0s0a";
792 rootdevnames[1] = "ufs:vkd0s1a";
793 }
794 }
795
796 DiskNum++;
797 } else {
798 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
799 continue;
800 }
801 }
802}
803
804static
805int
806netif_set_tapflags(int tap_unit, int f, int s)
807{
808 struct ifreq ifr;
809 int flags;
810
811 bzero(&ifr, sizeof(ifr));
812
813 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
814 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
815 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
816 return -1;
817 }
818
819 /*
820 * Adjust if_flags
821 *
822 * If the flags are already set/cleared, then we return
823 * immediately to avoid extra syscalls
824 */
825 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
826 if (f < 0) {
827 /* Turn off flags */
828 f = -f;
829 if ((flags & f) == 0)
830 return 0;
831 flags &= ~f;
832 } else {
833 /* Turn on flags */
834 if (flags & f)
835 return 0;
836 flags |= f;
837 }
838
839 /*
840 * Fix up ifreq.ifr_name, since it may be trashed
841 * in previous ioctl(SIOCGIFFLAGS)
842 */
843 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
844
845 ifr.ifr_flags = flags & 0xffff;
846 ifr.ifr_flagshigh = flags >> 16;
847 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
848 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
849 return -1;
850 }
851 return 0;
852}
853
854static
855int
856netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
857{
858 struct ifaliasreq ifra;
859 struct sockaddr_in *in;
860
861 bzero(&ifra, sizeof(ifra));
862 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
863
864 /* Setup address */
865 in = (struct sockaddr_in *)&ifra.ifra_addr;
866 in->sin_family = AF_INET;
867 in->sin_len = sizeof(*in);
868 in->sin_addr.s_addr = addr;
869
870 if (mask != 0) {
871 /* Setup netmask */
872 in = (struct sockaddr_in *)&ifra.ifra_mask;
873 in->sin_len = sizeof(*in);
874 in->sin_addr.s_addr = mask;
875 }
876
877 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
878 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
879 return -1;
880 }
881 return 0;
882}
883
884static
885int
886netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
887{
888 struct ifbreq ifbr;
889 struct ifdrv ifd;
890
891 bzero(&ifbr, sizeof(ifbr));
892 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
893 "tap%d", tap_unit);
894
895 bzero(&ifd, sizeof(ifd));
896 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
897 ifd.ifd_cmd = BRDGADD;
898 ifd.ifd_len = sizeof(ifbr);
899 ifd.ifd_data = &ifbr;
900
901 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
902 /*
903 * 'errno == EEXIST' means that the tap(4) is already
904 * a member of the bridge(4)
905 */
906 if (errno != EEXIST) {
907 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
908 return -1;
909 }
910 }
911 return 0;
912}
913
914#define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
915
916/*
917 * Locate the first unused tap(4) device file if auto mode is requested,
918 * or open the user supplied device file, and bring up the corresponding
919 * tap(4) interface.
920 *
921 * NOTE: Only tap(4) device file is supported currently
922 */
923static
924int
925netif_open_tap(const char *netif, int *tap_unit, int s)
926{
927 char tap_dev[MAXPATHLEN];
928 int tap_fd, failed;
929 struct stat st;
930 char *dname;
931
932 *tap_unit = -1;
933
934 if (strcmp(netif, "auto") == 0) {
935 /*
936 * Find first unused tap(4) device file
937 */
938 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
939 if (tap_fd < 0) {
940 warnc(errno, "Unable to find a free tap(4)");
941 return -1;
942 }
943 } else {
944 /*
945 * User supplied tap(4) device file or unix socket.
946 */
947 if (netif[0] == '/') /* Absolute path */
948 strlcpy(tap_dev, netif, sizeof(tap_dev));
949 else
950 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
951
952 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
953
954 /*
955 * If we cannot open normally try to connect to it.
956 */
957 if (tap_fd < 0)
958 tap_fd = unix_connect(tap_dev);
959
960 if (tap_fd < 0) {
961 warn("Unable to open %s", tap_dev);
962 return -1;
963 }
964 }
965
966 /*
967 * Check whether the device file is a tap(4)
968 */
969 if (fstat(tap_fd, &st) < 0) {
970 failed = 1;
971 } else if (S_ISCHR(st.st_mode)) {
972 dname = fdevname(tap_fd);
973 if (dname)
974 dname = strstr(dname, "tap");
975 if (dname) {
976 /*
977 * Bring up the corresponding tap(4) interface
978 */
979 *tap_unit = strtol(dname + 3, NULL, 10);
980 printf("TAP UNIT %d\n", *tap_unit);
981 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
982 failed = 0;
3b6e5cb0
SW
983 else
984 failed = 1;
da673940
JG
985 } else {
986 failed = 1;
987 }
988 } else if (S_ISSOCK(st.st_mode)) {
989 /*
990 * Special socket connection (typically to vknet). We
991 * do not have to do anything.
992 */
993 failed = 0;
994 } else {
995 failed = 1;
996 }
997
998 if (failed) {
999 warnx("%s is not a tap(4) device or socket", tap_dev);
1000 close(tap_fd);
1001 tap_fd = -1;
1002 *tap_unit = -1;
1003 }
1004 return tap_fd;
1005}
1006
1007static int
1008unix_connect(const char *path)
1009{
1010 struct sockaddr_un sunx;
1011 int len;
1012 int net_fd;
1013 int sndbuf = 262144;
1014 struct stat st;
1015
1016 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
1017 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
1018 ++len; /* include nul */
1019 sunx.sun_family = AF_UNIX;
1020 sunx.sun_len = len;
1021
1022 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
1023 if (net_fd < 0)
1024 return(-1);
1025 if (connect(net_fd, (void *)&sunx, len) < 0) {
1026 close(net_fd);
1027 return(-1);
1028 }
1029 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
1030 if (fstat(net_fd, &st) == 0)
1031 printf("Network socket buffer: %d bytes\n", st.st_blksize);
1032 fcntl(net_fd, F_SETFL, O_NONBLOCK);
1033 return(net_fd);
1034}
1035
1036#undef TAPDEV_MAJOR
1037#undef TAPDEV_MINOR
1038#undef TAPDEV_OFLAGS
1039
1040/*
1041 * Following syntax is supported,
1042 * 1) x.x.x.x tap(4)'s address is x.x.x.x
1043 *
1044 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
1045 * tap(4)'s netmask len is z
1046 *
1047 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
1048 * pseudo netif's address is y.y.y.y
1049 *
1050 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
1051 * pseudo netif's address is y.y.y.y
1052 * tap(4) and pseudo netif's netmask len are z
1053 *
1054 * 5) bridgeX tap(4) will be added to bridgeX
1055 *
1056 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
1057 * pseudo netif's address is y.y.y.y
1058 *
1059 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1060 * pseudo netif's address is y.y.y.y
1061 * pseudo netif's netmask len is z
1062 */
1063static
1064int
1065netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1066{
1067 in_addr_t tap_addr, netmask, netif_addr;
1068 int next_netif_addr;
1069 char *tok, *masklen_str, *ifbridge;
1070
1071 *addr = 0;
1072 *mask = 0;
1073
1074 tok = strtok(NULL, ":/");
1075 if (tok == NULL) {
1076 /*
1077 * Nothing special, simply use tap(4) as backend
1078 */
1079 return 0;
1080 }
1081
1082 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1083 /*
1084 * tap(4)'s address is supplied
1085 */
1086 ifbridge = NULL;
1087
1088 /*
1089 * If there is next token, then it may be pseudo
1090 * netif's address or netmask len for tap(4)
1091 */
1092 next_netif_addr = 0;
1093 } else {
1094 /*
1095 * Not tap(4)'s address, assume it as a bridge(4)
1096 * iface name
1097 */
1098 tap_addr = 0;
1099 ifbridge = tok;
1100
1101 /*
1102 * If there is next token, then it must be pseudo
1103 * netif's address
1104 */
1105 next_netif_addr = 1;
1106 }
1107
1108 netmask = netif_addr = 0;
1109
1110 tok = strtok(NULL, ":/");
1111 if (tok == NULL)
1112 goto back;
1113
1114 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1115 if (next_netif_addr) {
1116 warnx("Invalid pseudo netif address: %s", tok);
1117 return -1;
1118 }
1119 netif_addr = 0;
1120
1121 /*
1122 * Current token is not address, then it must be netmask len
1123 */
1124 masklen_str = tok;
1125 } else {
1126 /*
1127 * Current token is pseudo netif address, if there is next token
1128 * it must be netmask len
1129 */
1130 masklen_str = strtok(NULL, "/");
1131 }
1132
1133 /* Calculate netmask */
1134 if (masklen_str != NULL) {
1135 u_long masklen;
1136
1137 masklen = strtoul(masklen_str, NULL, 10);
1138 if (masklen < 32 && masklen > 0) {
1139 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1140 & 0xffffffff);
1141 } else {
1142 warnx("Invalid netmask len: %lu", masklen);
1143 return -1;
1144 }
1145 }
1146
1147 /* Make sure there is no more token left */
1148 if (strtok(NULL, ":/") != NULL) {
1149 warnx("Invalid argument to '-I'");
1150 return -1;
1151 }
1152
1153back:
1154 if (tap_unit < 0) {
1155 /* Do nothing */
1156 } else if (ifbridge == NULL) {
1157 /* Set tap(4) address/netmask */
1158 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1159 return -1;
1160 } else {
1161 /* Tie tap(4) to bridge(4) */
1162 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1163 return -1;
1164 }
1165
1166 *addr = netif_addr;
1167 *mask = netmask;
1168 return 0;
1169}
1170
1171/*
1172 * NetifInfo[] will be filled for pseudo netif initialization.
1173 * NetifNum will be bumped to reflect the number of valid entries
1174 * in NetifInfo[].
1175 */
1176static
1177void
1178init_netif(char *netifExp[], int netifExpNum)
1179{
1180 int i, s;
1181
1182 if (netifExpNum == 0)
1183 return;
1184
1185 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1186 if (s < 0)
1187 return;
1188
1189 for (i = 0; i < netifExpNum; ++i) {
1190 struct vknetif_info *info;
1191 in_addr_t netif_addr, netif_mask;
1192 int tap_fd, tap_unit;
1193 char *netif;
1194
1195 netif = strtok(netifExp[i], ":");
1196 if (netif == NULL) {
1197 warnx("Invalid argument to '-I'");
1198 continue;
1199 }
1200
1201 /*
1202 * Open tap(4) device file and bring up the
1203 * corresponding interface
1204 */
1205 tap_fd = netif_open_tap(netif, &tap_unit, s);
1206 if (tap_fd < 0)
1207 continue;
1208
1209 /*
1210 * Initialize tap(4) and get address/netmask
1211 * for pseudo netif
1212 *
1213 * NB: Rest part of netifExp[i] is passed
1214 * to netif_init_tap() implicitly.
1215 */
1216 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1217 /*
1218 * NB: Closing tap(4) device file will bring
1219 * down the corresponding interface
1220 */
1221 close(tap_fd);
1222 continue;
1223 }
1224
1225 info = &NetifInfo[NetifNum];
1226 info->tap_fd = tap_fd;
1227 info->tap_unit = tap_unit;
1228 info->netif_addr = netif_addr;
1229 info->netif_mask = netif_mask;
1230
1231 NetifNum++;
1232 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1233 break;
1234 }
1235 close(s);
1236}
1237
bc3cc25e
MD
1238/*
1239 * Create the pid file and leave it open and locked while the vkernel is
1240 * running. This allows a script to use /usr/bin/lockf to probe whether
1241 * a vkernel is still running (so as not to accidently kill an unrelated
1242 * process from a stale pid file).
1243 */
da673940
JG
1244static
1245void
bc3cc25e 1246writepid(void)
da673940 1247{
bc3cc25e
MD
1248 char buf[32];
1249 int fd;
da673940
JG
1250
1251 if (pid_file != NULL) {
bc3cc25e
MD
1252 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid());
1253 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666);
1254 if (fd < 0) {
1255 if (errno == EWOULDBLOCK) {
1256 perror("Failed to lock pidfile, "
1257 "vkernel already running");
1258 } else {
1259 perror("Failed to create pidfile");
1260 }
1261 exit(EX_SOFTWARE);
da673940 1262 }
bc3cc25e
MD
1263 ftruncate(fd, 0);
1264 write(fd, buf, strlen(buf));
1265 /* leave the file open to maintain the lock */
da673940
JG
1266 }
1267}
1268
1269static
1270void
1271cleanpid( void )
1272{
1273 if (pid_file != NULL) {
bc3cc25e 1274 if (unlink(pid_file) < 0)
da673940
JG
1275 perror("Warning: couldn't remove pidfile");
1276 }
1277}
1278
1279static
1280void
278c4e67 1281usage_err(const char *ctl, ...)
da673940
JG
1282{
1283 va_list va;
1284
1285 va_start(va, ctl);
1286 vfprintf(stderr, ctl, va);
1287 va_end(va);
1288 fprintf(stderr, "\n");
278c4e67
SG
1289 exit(EX_USAGE);
1290}
1291
1292static
1293void
1294usage_help(_Bool help)
1295{
1296 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n"
1297 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n"
9bea6114
MC
1298 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n"
1299 "\t[-p file] [-r file]\n", save_av[0]);
278c4e67
SG
1300
1301 if (help)
1302 fprintf(stderr, "\nArguments:\n"
1303 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n"
1304 "\t-e\tSpecify an environment to be used by the kernel.\n"
1305 "\t-h\tThis list of options.\n"
1306 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n"
1307 "\t-I\tCreate a virtual network device.\n"
1308 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n"
1309 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n"
9bea6114
MC
1310 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n"
1311 "\t \t- numcpus - number of cpus\n"
1312 "\t \t- :lbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1313 "\t \t the logical ID. Controls the number of threads/core (0bits - 1 thread, 1bit - 2 threads).\n"
1314 "\t \t- :cbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1315 "\t \t the core ID. Controls the number of core/package (0bits - 1 core, 1bit - 2 cores).\n"
278c4e67
SG
1316 "\t-p\tSpecify a file in which to store the process ID.\n"
1317 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n"
1318 "\t-s\tBoot into single-user mode.\n"
1319 "\t-U\tEnable writing to kernel memory and module loading.\n"
1320 "\t-v\tTurn on verbose booting.\n");
1321
1322 exit(EX_USAGE);
da673940
JG
1323}
1324
1325void
1326cpu_reset(void)
1327{
1328 kprintf("cpu reset, rebooting vkernel\n");
1329 closefrom(3);
1330 cleanpid();
1331 execv(save_av[0], save_av);
1332}
1333
1334void
1335cpu_halt(void)
1336{
1337 kprintf("cpu halt, exiting vkernel\n");
1338 cleanpid();
278c4e67 1339 exit(EX_OK);
da673940
JG
1340}
1341
1342void
1343setrealcpu(void)
1344{
1345 switch(lwp_cpu_lock) {
1346 case LCL_PER_CPU:
1347 if (bootverbose)
1348 kprintf("Locking CPU%d to real cpu %d\n",
1349 mycpuid, next_cpu);
1350 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1351 next_cpu++;
1352 if (next_cpu >= real_ncpus)
1353 next_cpu = 0;
1354 break;
1355 case LCL_SINGLE_CPU:
1356 if (bootverbose)
1357 kprintf("Locking CPU%d to real cpu %d\n",
1358 mycpuid, next_cpu);
1359 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1360 break;
1361 default:
1362 /* do not map virtual cpus to real cpus */
1363 break;
1364 }
1365}
bf7c5253
MD
1366
1367/*
1368 * Allocate and free memory for module loading. The loaded module
1369 * has to be placed somewhere near the current kernel binary load
1370 * point or the relocations will not work.
1371 *
1372 * I'm not sure why this isn't working.
1373 */
1374int
1375vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes)
1376{
1377 kprintf("module loading for vkernel64's not currently supported\n");
1378 *basep = 0;
1379 return ENOMEM;
1380#if 0
1381#if 1
1382 size_t xtra;
1383 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK;
1384 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra;
1385 bzero((void *)*basep, bytes);
1386#else
1387 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes,
1388 PROT_READ|PROT_WRITE|PROT_EXEC,
1389 MAP_ANON|MAP_SHARED, -1, 0);
1390 if ((void *)*basep == MAP_FAILED)
1391 return ENOMEM;
1392#endif
1393 kprintf("basep %p %p %zd\n",
1394 (void *)vkernel_module_memory_alloc, (void *)*basep, bytes);
1395 return 0;
1396#endif
1397}
1398
1399void
1400vkernel_module_memory_free(vm_offset_t base, size_t bytes)
1401{
1402#if 0
1403#if 0
1404 munmap((void *)base, bytes);
1405#endif
1406#endif
1407}