vkernel64: Add a missing 'break'.
[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;
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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;
da673940
JG
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;
180#ifdef SMP
181 optcpus = 2;
9bea6114
MC
182 vkernel_b_arg = 0;
183 vkernel_B_arg = 0;
da673940
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184#endif
185 lwp_cpu_lock = LCL_NONE;
186
187 real_vkernel_enable = 0;
188 vsize = sizeof(real_vkernel_enable);
189 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
190
191 if (real_vkernel_enable == 0) {
192 errx(1, "vm.vkernel_enable is 0, must be set "
193 "to 1 to execute a vkernel!");
194 }
195
196 real_ncpus = 1;
197 vsize = sizeof(real_ncpus);
198 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
199
278c4e67
SG
200 if (ac < 2)
201 usage_help(false);
202
9bea6114 203 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:Ub:B:")) != -1) {
da673940
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204 switch(c) {
205 case 'e':
206 /*
207 * name=value:name=value:name=value...
208 * name="value"...
209 *
210 * Allow values to be quoted but note that shells
211 * may remove the quotes, so using this feature
212 * to embed colons may require a backslash.
213 */
214 n = strlen(optarg);
215 isq = 0;
974f8ffe
AHJ
216
217 if (eflag == 0) {
218 kenv_size = n + 2;
219 kern_envp = malloc(kenv_size);
220 if (kern_envp == NULL)
221 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size);
222 } else {
223 kenv_size2 = kenv_size + n + 1;
224 pos = kenv_size - 1;
225 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL)
226 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2);
227 kern_envp = tmp;
228 kenv_size = kenv_size2;
229 }
230
231 for (i = 0, j = pos; i < n; ++i) {
da673940
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232 if (optarg[i] == '"')
233 isq ^= 1;
234 else if (optarg[i] == '\'')
235 isq ^= 2;
236 else if (isq == 0 && optarg[i] == ':')
237 kern_envp[j++] = 0;
238 else
239 kern_envp[j++] = optarg[i];
240 }
241 kern_envp[j++] = 0;
242 kern_envp[j++] = 0;
974f8ffe 243 eflag++;
da673940
JG
244 break;
245 case 's':
246 boothowto |= RB_SINGLE;
247 break;
248 case 'v':
249 bootverbose = 1;
250 break;
251 case 'i':
252 memImageFile = optarg;
253 break;
254 case 'I':
255 if (netifFileNum < VKNETIF_MAX)
256 netifFile[netifFileNum++] = strdup(optarg);
257 break;
258 case 'r':
259 if (bootOnDisk < 0)
260 bootOnDisk = 1;
261 if (diskFileNum + cdFileNum < VKDISK_MAX)
262 diskFile[diskFileNum++] = strdup(optarg);
263 break;
264 case 'c':
265 if (bootOnDisk < 0)
266 bootOnDisk = 0;
267 if (diskFileNum + cdFileNum < VKDISK_MAX)
268 cdFile[cdFileNum++] = strdup(optarg);
269 break;
270 case 'm':
271 Maxmem_bytes = strtoull(optarg, &suffix, 0);
272 if (suffix) {
273 switch(*suffix) {
274 case 'g':
275 case 'G':
276 Maxmem_bytes <<= 30;
277 break;
278 case 'm':
279 case 'M':
280 Maxmem_bytes <<= 20;
281 break;
282 case 'k':
283 case 'K':
284 Maxmem_bytes <<= 10;
285 break;
286 default:
287 Maxmem_bytes = 0;
278c4e67 288 usage_err("Bad maxmem option");
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289 /* NOT REACHED */
290 break;
291 }
292 }
293 break;
294 case 'l':
295 next_cpu = -1;
296 if (strncmp("map", optarg, 3) == 0) {
297 lwp_cpu_lock = LCL_PER_CPU;
298 if (optarg[3] == ',') {
299 next_cpu = strtol(optarg+4, &endp, 0);
300 if (*endp != '\0')
278c4e67 301 usage_err("Bad target CPU number at '%s'", endp);
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302 } else {
303 next_cpu = 0;
304 }
305 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
278c4e67 306 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
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307 } else if (strncmp("any", optarg, 3) == 0) {
308 lwp_cpu_lock = LCL_NONE;
309 } else {
310 lwp_cpu_lock = LCL_SINGLE_CPU;
311 next_cpu = strtol(optarg, &endp, 0);
312 if (*endp != '\0')
278c4e67 313 usage_err("Bad target CPU number at '%s'", endp);
da673940 314 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
278c4e67 315 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
da673940
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316 }
317 break;
318 case 'n':
319 /*
320 * This value is set up by mp_start(), don't just
321 * set ncpus here.
322 */
9bea6114 323 tok = strtok(optarg, ":");
da673940 324#ifdef SMP
9bea6114 325 optcpus = strtol(tok, NULL, 0);
da673940 326 if (optcpus < 1 || optcpus > MAXCPU)
278c4e67 327 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU);
9bea6114
MC
328
329 /* :lbits argument */
330 tok = strtok(NULL, ":");
331 if (tok != NULL) {
332 vkernel_b_arg = strtol(tok, NULL, 0);
333
334 /* :cbits argument */
335 tok = strtok(NULL, ":");
336 if (tok != NULL) {
337 vkernel_B_arg = strtol(tok, NULL, 0);
338 }
339
340 }
341
da673940 342#else
9bea6114 343 if (strtol(tok, NULL, 0) != 1) {
278c4e67 344 usage_err("You built a UP vkernel, only 1 cpu!");
da673940 345 }
9bea6114
MC
346
347 /* :lbits argument */
348 tok = strtok(NULL, ":");
349 if (tok != NULL) {
350 usage_err("You built a UP vkernel. No CPU topology available");
351
352 /* :cbits argument */
353 tok = strtok(NULL, ":");
354 if (tok != NULL) {
355 usage_err("You built a UP vkernel. No CPU topology available");
356 }
357 }
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358#endif
359
8619df8e 360 break;
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361 case 'p':
362 pid_file = optarg;
363 break;
364 case 'U':
365 kernel_mem_readonly = 0;
366 break;
278c4e67
SG
367 case 'h':
368 usage_help(true);
369 break;
278c4e67
SG
370 default:
371 usage_help(false);
da673940
JG
372 }
373 }
374
375 writepid();
376 cpu_disable_intr();
377 init_sys_memory(memImageFile);
378 init_kern_memory();
379 init_globaldata();
380 init_vkernel();
381 setrealcpu();
382 init_kqueue();
383
08771751
VS
384 vmm_guest = 1;
385
da673940
JG
386 /*
387 * Check TSC
388 */
389 vsize = sizeof(tsc_present);
390 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
391 vsize = sizeof(tsc_frequency);
392 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
393 if (tsc_present)
394 cpu_feature |= CPUID_TSC;
395
396 /*
397 * Check SSE
398 */
399 vsize = sizeof(supports_sse);
400 supports_sse = 0;
401 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
402 init_fpu(supports_sse);
403 if (supports_sse)
404 cpu_feature |= CPUID_SSE | CPUID_FXSR;
405
406 /*
407 * We boot from the first installed disk.
408 */
409 if (bootOnDisk == 1) {
410 init_disk(diskFile, diskFileNum, VKD_DISK);
411 init_disk(cdFile, cdFileNum, VKD_CD);
412 } else {
413 init_disk(cdFile, cdFileNum, VKD_CD);
414 init_disk(diskFile, diskFileNum, VKD_DISK);
415 }
416 init_netif(netifFile, netifFileNum);
417 init_exceptions();
418 mi_startup();
419 /* NOT REACHED */
278c4e67 420 exit(EX_SOFTWARE);
da673940
JG
421}
422
423/*
424 * Initialize system memory. This is the virtual kernel's 'RAM'.
425 */
426static
427void
428init_sys_memory(char *imageFile)
429{
430 struct stat st;
431 int i;
432 int fd;
433
434 /*
435 * Figure out the system memory image size. If an image file was
436 * specified and -m was not specified, use the image file's size.
437 */
da673940
JG
438 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
439 Maxmem_bytes = (vm_paddr_t)st.st_size;
440 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
441 Maxmem_bytes == 0) {
376264e3 442 errx(1, "Cannot create new memory file %s unless "
da673940
JG
443 "system memory size is specified with -m",
444 imageFile);
445 /* NOT REACHED */
446 }
447
448 /*
449 * Maxmem must be known at this time
450 */
242e00e6
AHJ
451 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
452 errx(1, "Bad maxmem specification: 64MB minimum, "
da673940
JG
453 "multiples of %dMB only",
454 SEG_SIZE / 1024 / 1024);
455 /* NOT REACHED */
456 }
457
458 /*
459 * Generate an image file name if necessary, then open/create the
460 * file exclusively locked. Do not allow multiple virtual kernels
461 * to use the same image file.
bc3cc25e
MD
462 *
463 * Don't iterate through a million files if we do not have write
464 * access to the directory, stop if our open() failed on a
465 * non-existant file. Otherwise opens can fail for any number
da673940
JG
466 */
467 if (imageFile == NULL) {
468 for (i = 0; i < 1000000; ++i) {
469 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
470 fd = open(imageFile,
471 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
bc3cc25e 472 if (fd < 0 && stat(imageFile, &st) == 0) {
da673940
JG
473 free(imageFile);
474 continue;
475 }
476 break;
477 }
478 } else {
479 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
480 }
481 fprintf(stderr, "Using memory file: %s\n", imageFile);
482 if (fd < 0 || fstat(fd, &st) < 0) {
483 err(1, "Unable to open/create %s", imageFile);
484 /* NOT REACHED */
485 }
486
487 /*
b72e51d1
MD
488 * Truncate or extend the file as necessary. Clean out the contents
489 * of the file, we want it to be full of holes so we don't waste
490 * time reading in data from an old file that we no longer care
491 * about.
da673940 492 */
b72e51d1
MD
493 ftruncate(fd, 0);
494 ftruncate(fd, Maxmem_bytes);
da673940 495
da673940
JG
496 MemImageFd = fd;
497 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
9f90716f 498 physmem = Maxmem;
da673940
JG
499}
500
501/*
502 * Initialize kernel memory. This reserves kernel virtual memory by using
503 * MAP_VPAGETABLE
504 */
505
506static
507void
508init_kern_memory(void)
509{
510 void *base;
511 void *try;
da673940
JG
512 char dummy;
513 char *topofstack = &dummy;
da673940
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514 int i;
515 void *firstfree;
516
517 /*
518 * Memory map our kernel virtual memory space. Note that the
519 * kernel image itself is not made part of this memory for the
520 * moment.
521 *
522 * The memory map must be segment-aligned so we can properly
523 * offset KernelPTD.
524 *
525 * If the system kernel has a different MAXDSIZ, it might not
526 * be possible to map kernel memory in its prefered location.
527 * Try a number of different locations.
528 */
529 try = (void *)(512UL << 30);
530 base = NULL;
531 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
532 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
533 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
2c2e847c 534 MemImageFd, (off_t)try);
da673940
JG
535 if (base == try)
536 break;
537 if (base != MAP_FAILED)
538 munmap(base, KERNEL_KVA_SIZE);
539 try = (char *)try + (512UL << 30);
540 }
541 if (base != try) {
542 err(1, "Unable to mmap() kernel virtual memory!");
543 /* NOT REACHED */
544 }
545 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
546 KvaStart = (vm_offset_t)base;
547 KvaSize = KERNEL_KVA_SIZE;
548 KvaEnd = KvaStart + KvaSize;
d4f5f27c
MD
549
550 /* cannot use kprintf yet */
da673940
JG
551 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
552
553 /* MAP_FILE? */
554 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE,
555 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED,
556 MemImageFd, 0);
557 if (dmap_min_address == MAP_FAILED) {
558 err(1, "Unable to mmap() kernel DMAP region!");
559 /* NOT REACHED */
560 }
561
4090d6ff 562 firstfree = NULL;
2c2e847c 563 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base);
da673940
JG
564
565 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
566 0 | VPTE_R | VPTE_W | VPTE_V);
567
568 /*
569 * phys_avail[] represents unallocated physical memory. MI code
570 * will use phys_avail[] to create the vm_page array.
571 */
2c2e847c 572 phys_avail[0] = (vm_paddr_t)firstfree;
da673940
JG
573 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
574 phys_avail[1] = Maxmem_bytes;
575
576#if JGV
577 /*
578 * (virtual_start, virtual_end) represent unallocated kernel virtual
579 * memory. MI code will create kernel_map using these parameters.
580 */
581 virtual_start = KvaStart + (long)firstfree;
582 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
583 virtual_end = KvaStart + KERNEL_KVA_SIZE;
584#endif
585
586 /*
587 * pmap_growkernel() will set the correct value.
588 */
589 kernel_vm_end = 0;
590
591 /*
592 * Allocate space for process 0's UAREA.
593 */
594 proc0paddr = (void *)virtual_start;
595 for (i = 0; i < UPAGES; ++i) {
596 pmap_kenter_quick(virtual_start, phys_avail[0]);
597 virtual_start += PAGE_SIZE;
598 phys_avail[0] += PAGE_SIZE;
599 }
600
601 /*
602 * crashdumpmap
603 */
604 crashdumpmap = virtual_start;
605 virtual_start += MAXDUMPPGS * PAGE_SIZE;
606
607 /*
608 * msgbufp maps the system message buffer
609 */
610 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
611 msgbufp = (void *)virtual_start;
612 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
613 pmap_kenter_quick(virtual_start, phys_avail[0]);
614 virtual_start += PAGE_SIZE;
615 phys_avail[0] += PAGE_SIZE;
616 }
617 msgbufinit(msgbufp, MSGBUF_SIZE);
618
619 /*
620 * used by kern_memio for /dev/mem access
621 */
622 ptvmmap = (caddr_t)virtual_start;
623 virtual_start += PAGE_SIZE;
624
625 /*
626 * Bootstrap the kernel_pmap
627 */
628#if JGV
629 pmap_bootstrap();
630#endif
631}
632
633/*
634 * Map the per-cpu globaldata for cpu #0. Allocate the space using
635 * virtual_start and phys_avail[0]
636 */
637static
638void
639init_globaldata(void)
640{
641 int i;
642 vm_paddr_t pa;
643 vm_offset_t va;
644
645 /*
646 * Reserve enough KVA to cover possible cpus. This is a considerable
647 * amount of KVA since the privatespace structure includes two
648 * whole page table mappings.
649 */
650 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
651 CPU_prvspace = (void *)virtual_start;
652 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
653
654 /*
655 * Allocate enough physical memory to cover the mdglobaldata
656 * portion of the space and the idle stack and map the pages
657 * into KVA. For cpu #0 only.
658 */
659 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
660 pa = phys_avail[0];
661 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
662 pmap_kenter_quick(va, pa);
663 phys_avail[0] += PAGE_SIZE;
664 }
665 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
666 pa = phys_avail[0];
667 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
668 pmap_kenter_quick(va, pa);
669 phys_avail[0] += PAGE_SIZE;
670 }
671
672 /*
673 * Setup the %gs for cpu #0. The mycpu macro works after this
674 * point. Note that %fs is used by pthreads.
675 */
676 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace));
677}
678
0f85165c
AHJ
679
680/*
681 * Initialize pool tokens and other necessary locks
682 */
683static void
684init_locks(void)
685{
686
687#ifdef SMP
688 /*
689 * Get the initial mplock with a count of 1 for the BSP.
690 * This uses a LOGICAL cpu ID, ie BSP == 0.
691 */
692 cpu_get_initial_mplock();
693#endif
694
695 /* our token pool needs to work early */
696 lwkt_token_pool_init();
697
698}
699
700
da673940
JG
701/*
702 * Initialize very low level systems including thread0, proc0, etc.
703 */
704static
705void
706init_vkernel(void)
707{
708 struct mdglobaldata *gd;
709
710 gd = &CPU_prvspace[0].mdglobaldata;
711 bzero(gd, sizeof(*gd));
712
713 gd->mi.gd_curthread = &thread0;
714 thread0.td_gd = &gd->mi;
715 ncpus = 1;
716 ncpus2 = 1; /* rounded down power of 2 */
717 ncpus_fit = 1; /* rounded up power of 2 */
718 /* ncpus2_mask and ncpus_fit_mask are 0 */
719 init_param1();
720 gd->mi.gd_prvspace = &CPU_prvspace[0];
721 mi_gdinit(&gd->mi, 0);
722 cpu_gdinit(gd, 0);
723 mi_proc0init(&gd->mi, proc0paddr);
724 lwp0.lwp_md.md_regs = &proc0_tf;
725
0f85165c 726 init_locks();
da673940
JG
727 cninit();
728 rand_initialize();
729#if 0 /* #ifdef DDB */
730 kdb_init();
731 if (boothowto & RB_KDB)
732 Debugger("Boot flags requested debugger");
733#endif
734 identcpu();
735#if 0
736 initializecpu(); /* Initialize CPU registers */
737#endif
738 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
739
740#if 0
741 /*
742 * Map the message buffer
743 */
744 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
745 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
746 msgbufinit(msgbufp, MSGBUF_SIZE);
747#endif
748#if 0
749 thread0.td_pcb_cr3 ... MMU
750 lwp0.lwp_md.md_regs = &proc0_tf;
751#endif
752}
753
754/*
755 * Filesystem image paths for the virtual kernel are optional.
756 * If specified they each should point to a disk image,
757 * the first of which will become the root disk.
758 *
759 * The virtual kernel caches data from our 'disk' just like a normal kernel,
760 * so we do not really want the real kernel to cache the data too. Use
761 * O_DIRECT to remove the duplication.
762 */
763static
764void
765init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
766{
767 int i;
768
769 if (diskFileNum == 0)
770 return;
771
772 for(i=0; i < diskFileNum; i++){
773 char *fname;
774 fname = diskExp[i];
775
776 if (fname == NULL) {
777 warnx("Invalid argument to '-r'");
778 continue;
779 }
780
781 if (DiskNum < VKDISK_MAX) {
782 struct stat st;
783 struct vkdisk_info* info = NULL;
784 int fd;
785 size_t l = 0;
786
787 if (type == VKD_DISK)
6882b7a5 788 fd = open(fname, O_RDWR|O_DIRECT, 0644);
da673940
JG
789 else
790 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
791 if (fd < 0 || fstat(fd, &st) < 0) {
da673940
JG
792 err(1, "Unable to open/create %s", fname);
793 /* NOT REACHED */
794 }
6882b7a5
MD
795 if (S_ISREG(st.st_mode)) {
796 if (flock(fd, LOCK_EX|LOCK_NB) < 0) {
797 errx(1, "Disk image %s is already "
798 "in use\n", fname);
799 /* NOT REACHED */
800 }
801 }
da673940
JG
802
803 info = &DiskInfo[DiskNum];
804 l = strlen(fname);
805
806 info->unit = i;
807 info->fd = fd;
808 info->type = type;
809 memcpy(info->fname, fname, l);
810
811 if (DiskNum == 0) {
812 if (type == VKD_CD) {
813 rootdevnames[0] = "cd9660:vcd0a";
814 } else if (type == VKD_DISK) {
815 rootdevnames[0] = "ufs:vkd0s0a";
816 rootdevnames[1] = "ufs:vkd0s1a";
817 }
818 }
819
820 DiskNum++;
821 } else {
822 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
823 continue;
824 }
825 }
826}
827
828static
829int
830netif_set_tapflags(int tap_unit, int f, int s)
831{
832 struct ifreq ifr;
833 int flags;
834
835 bzero(&ifr, sizeof(ifr));
836
837 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
838 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
839 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
840 return -1;
841 }
842
843 /*
844 * Adjust if_flags
845 *
846 * If the flags are already set/cleared, then we return
847 * immediately to avoid extra syscalls
848 */
849 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
850 if (f < 0) {
851 /* Turn off flags */
852 f = -f;
853 if ((flags & f) == 0)
854 return 0;
855 flags &= ~f;
856 } else {
857 /* Turn on flags */
858 if (flags & f)
859 return 0;
860 flags |= f;
861 }
862
863 /*
864 * Fix up ifreq.ifr_name, since it may be trashed
865 * in previous ioctl(SIOCGIFFLAGS)
866 */
867 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
868
869 ifr.ifr_flags = flags & 0xffff;
870 ifr.ifr_flagshigh = flags >> 16;
871 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
872 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
873 return -1;
874 }
875 return 0;
876}
877
878static
879int
880netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
881{
882 struct ifaliasreq ifra;
883 struct sockaddr_in *in;
884
885 bzero(&ifra, sizeof(ifra));
886 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
887
888 /* Setup address */
889 in = (struct sockaddr_in *)&ifra.ifra_addr;
890 in->sin_family = AF_INET;
891 in->sin_len = sizeof(*in);
892 in->sin_addr.s_addr = addr;
893
894 if (mask != 0) {
895 /* Setup netmask */
896 in = (struct sockaddr_in *)&ifra.ifra_mask;
897 in->sin_len = sizeof(*in);
898 in->sin_addr.s_addr = mask;
899 }
900
901 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
902 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
903 return -1;
904 }
905 return 0;
906}
907
908static
909int
910netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
911{
912 struct ifbreq ifbr;
913 struct ifdrv ifd;
914
915 bzero(&ifbr, sizeof(ifbr));
916 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
917 "tap%d", tap_unit);
918
919 bzero(&ifd, sizeof(ifd));
920 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
921 ifd.ifd_cmd = BRDGADD;
922 ifd.ifd_len = sizeof(ifbr);
923 ifd.ifd_data = &ifbr;
924
925 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
926 /*
927 * 'errno == EEXIST' means that the tap(4) is already
928 * a member of the bridge(4)
929 */
930 if (errno != EEXIST) {
931 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
932 return -1;
933 }
934 }
935 return 0;
936}
937
938#define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
939
940/*
941 * Locate the first unused tap(4) device file if auto mode is requested,
942 * or open the user supplied device file, and bring up the corresponding
943 * tap(4) interface.
944 *
945 * NOTE: Only tap(4) device file is supported currently
946 */
947static
948int
949netif_open_tap(const char *netif, int *tap_unit, int s)
950{
951 char tap_dev[MAXPATHLEN];
952 int tap_fd, failed;
953 struct stat st;
954 char *dname;
955
956 *tap_unit = -1;
957
958 if (strcmp(netif, "auto") == 0) {
959 /*
960 * Find first unused tap(4) device file
961 */
962 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
963 if (tap_fd < 0) {
964 warnc(errno, "Unable to find a free tap(4)");
965 return -1;
966 }
967 } else {
968 /*
969 * User supplied tap(4) device file or unix socket.
970 */
971 if (netif[0] == '/') /* Absolute path */
972 strlcpy(tap_dev, netif, sizeof(tap_dev));
973 else
974 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
975
976 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
977
978 /*
979 * If we cannot open normally try to connect to it.
980 */
981 if (tap_fd < 0)
982 tap_fd = unix_connect(tap_dev);
983
984 if (tap_fd < 0) {
985 warn("Unable to open %s", tap_dev);
986 return -1;
987 }
988 }
989
990 /*
991 * Check whether the device file is a tap(4)
992 */
993 if (fstat(tap_fd, &st) < 0) {
994 failed = 1;
995 } else if (S_ISCHR(st.st_mode)) {
996 dname = fdevname(tap_fd);
997 if (dname)
998 dname = strstr(dname, "tap");
999 if (dname) {
1000 /*
1001 * Bring up the corresponding tap(4) interface
1002 */
1003 *tap_unit = strtol(dname + 3, NULL, 10);
1004 printf("TAP UNIT %d\n", *tap_unit);
1005 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
1006 failed = 0;
3b6e5cb0
SW
1007 else
1008 failed = 1;
da673940
JG
1009 } else {
1010 failed = 1;
1011 }
1012 } else if (S_ISSOCK(st.st_mode)) {
1013 /*
1014 * Special socket connection (typically to vknet). We
1015 * do not have to do anything.
1016 */
1017 failed = 0;
1018 } else {
1019 failed = 1;
1020 }
1021
1022 if (failed) {
1023 warnx("%s is not a tap(4) device or socket", tap_dev);
1024 close(tap_fd);
1025 tap_fd = -1;
1026 *tap_unit = -1;
1027 }
1028 return tap_fd;
1029}
1030
1031static int
1032unix_connect(const char *path)
1033{
1034 struct sockaddr_un sunx;
1035 int len;
1036 int net_fd;
1037 int sndbuf = 262144;
1038 struct stat st;
1039
1040 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
1041 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
1042 ++len; /* include nul */
1043 sunx.sun_family = AF_UNIX;
1044 sunx.sun_len = len;
1045
1046 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
1047 if (net_fd < 0)
1048 return(-1);
1049 if (connect(net_fd, (void *)&sunx, len) < 0) {
1050 close(net_fd);
1051 return(-1);
1052 }
1053 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
1054 if (fstat(net_fd, &st) == 0)
1055 printf("Network socket buffer: %d bytes\n", st.st_blksize);
1056 fcntl(net_fd, F_SETFL, O_NONBLOCK);
1057 return(net_fd);
1058}
1059
1060#undef TAPDEV_MAJOR
1061#undef TAPDEV_MINOR
1062#undef TAPDEV_OFLAGS
1063
1064/*
1065 * Following syntax is supported,
1066 * 1) x.x.x.x tap(4)'s address is x.x.x.x
1067 *
1068 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
1069 * tap(4)'s netmask len is z
1070 *
1071 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
1072 * pseudo netif's address is y.y.y.y
1073 *
1074 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
1075 * pseudo netif's address is y.y.y.y
1076 * tap(4) and pseudo netif's netmask len are z
1077 *
1078 * 5) bridgeX tap(4) will be added to bridgeX
1079 *
1080 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
1081 * pseudo netif's address is y.y.y.y
1082 *
1083 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1084 * pseudo netif's address is y.y.y.y
1085 * pseudo netif's netmask len is z
1086 */
1087static
1088int
1089netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1090{
1091 in_addr_t tap_addr, netmask, netif_addr;
1092 int next_netif_addr;
1093 char *tok, *masklen_str, *ifbridge;
1094
1095 *addr = 0;
1096 *mask = 0;
1097
1098 tok = strtok(NULL, ":/");
1099 if (tok == NULL) {
1100 /*
1101 * Nothing special, simply use tap(4) as backend
1102 */
1103 return 0;
1104 }
1105
1106 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1107 /*
1108 * tap(4)'s address is supplied
1109 */
1110 ifbridge = NULL;
1111
1112 /*
1113 * If there is next token, then it may be pseudo
1114 * netif's address or netmask len for tap(4)
1115 */
1116 next_netif_addr = 0;
1117 } else {
1118 /*
1119 * Not tap(4)'s address, assume it as a bridge(4)
1120 * iface name
1121 */
1122 tap_addr = 0;
1123 ifbridge = tok;
1124
1125 /*
1126 * If there is next token, then it must be pseudo
1127 * netif's address
1128 */
1129 next_netif_addr = 1;
1130 }
1131
1132 netmask = netif_addr = 0;
1133
1134 tok = strtok(NULL, ":/");
1135 if (tok == NULL)
1136 goto back;
1137
1138 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1139 if (next_netif_addr) {
1140 warnx("Invalid pseudo netif address: %s", tok);
1141 return -1;
1142 }
1143 netif_addr = 0;
1144
1145 /*
1146 * Current token is not address, then it must be netmask len
1147 */
1148 masklen_str = tok;
1149 } else {
1150 /*
1151 * Current token is pseudo netif address, if there is next token
1152 * it must be netmask len
1153 */
1154 masklen_str = strtok(NULL, "/");
1155 }
1156
1157 /* Calculate netmask */
1158 if (masklen_str != NULL) {
1159 u_long masklen;
1160
1161 masklen = strtoul(masklen_str, NULL, 10);
1162 if (masklen < 32 && masklen > 0) {
1163 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1164 & 0xffffffff);
1165 } else {
1166 warnx("Invalid netmask len: %lu", masklen);
1167 return -1;
1168 }
1169 }
1170
1171 /* Make sure there is no more token left */
1172 if (strtok(NULL, ":/") != NULL) {
1173 warnx("Invalid argument to '-I'");
1174 return -1;
1175 }
1176
1177back:
1178 if (tap_unit < 0) {
1179 /* Do nothing */
1180 } else if (ifbridge == NULL) {
1181 /* Set tap(4) address/netmask */
1182 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1183 return -1;
1184 } else {
1185 /* Tie tap(4) to bridge(4) */
1186 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1187 return -1;
1188 }
1189
1190 *addr = netif_addr;
1191 *mask = netmask;
1192 return 0;
1193}
1194
1195/*
1196 * NetifInfo[] will be filled for pseudo netif initialization.
1197 * NetifNum will be bumped to reflect the number of valid entries
1198 * in NetifInfo[].
1199 */
1200static
1201void
1202init_netif(char *netifExp[], int netifExpNum)
1203{
1204 int i, s;
1205
1206 if (netifExpNum == 0)
1207 return;
1208
1209 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1210 if (s < 0)
1211 return;
1212
1213 for (i = 0; i < netifExpNum; ++i) {
1214 struct vknetif_info *info;
1215 in_addr_t netif_addr, netif_mask;
1216 int tap_fd, tap_unit;
1217 char *netif;
1218
1219 netif = strtok(netifExp[i], ":");
1220 if (netif == NULL) {
1221 warnx("Invalid argument to '-I'");
1222 continue;
1223 }
1224
1225 /*
1226 * Open tap(4) device file and bring up the
1227 * corresponding interface
1228 */
1229 tap_fd = netif_open_tap(netif, &tap_unit, s);
1230 if (tap_fd < 0)
1231 continue;
1232
1233 /*
1234 * Initialize tap(4) and get address/netmask
1235 * for pseudo netif
1236 *
1237 * NB: Rest part of netifExp[i] is passed
1238 * to netif_init_tap() implicitly.
1239 */
1240 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1241 /*
1242 * NB: Closing tap(4) device file will bring
1243 * down the corresponding interface
1244 */
1245 close(tap_fd);
1246 continue;
1247 }
1248
1249 info = &NetifInfo[NetifNum];
1250 info->tap_fd = tap_fd;
1251 info->tap_unit = tap_unit;
1252 info->netif_addr = netif_addr;
1253 info->netif_mask = netif_mask;
1254
1255 NetifNum++;
1256 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1257 break;
1258 }
1259 close(s);
1260}
1261
bc3cc25e
MD
1262/*
1263 * Create the pid file and leave it open and locked while the vkernel is
1264 * running. This allows a script to use /usr/bin/lockf to probe whether
1265 * a vkernel is still running (so as not to accidently kill an unrelated
1266 * process from a stale pid file).
1267 */
da673940
JG
1268static
1269void
bc3cc25e 1270writepid(void)
da673940 1271{
bc3cc25e
MD
1272 char buf[32];
1273 int fd;
da673940
JG
1274
1275 if (pid_file != NULL) {
bc3cc25e
MD
1276 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid());
1277 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666);
1278 if (fd < 0) {
1279 if (errno == EWOULDBLOCK) {
1280 perror("Failed to lock pidfile, "
1281 "vkernel already running");
1282 } else {
1283 perror("Failed to create pidfile");
1284 }
1285 exit(EX_SOFTWARE);
da673940 1286 }
bc3cc25e
MD
1287 ftruncate(fd, 0);
1288 write(fd, buf, strlen(buf));
1289 /* leave the file open to maintain the lock */
da673940
JG
1290 }
1291}
1292
1293static
1294void
1295cleanpid( void )
1296{
1297 if (pid_file != NULL) {
bc3cc25e 1298 if (unlink(pid_file) < 0)
da673940
JG
1299 perror("Warning: couldn't remove pidfile");
1300 }
1301}
1302
1303static
1304void
278c4e67 1305usage_err(const char *ctl, ...)
da673940
JG
1306{
1307 va_list va;
1308
1309 va_start(va, ctl);
1310 vfprintf(stderr, ctl, va);
1311 va_end(va);
1312 fprintf(stderr, "\n");
278c4e67
SG
1313 exit(EX_USAGE);
1314}
1315
1316static
1317void
1318usage_help(_Bool help)
1319{
1320 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n"
1321 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n"
9bea6114
MC
1322 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n"
1323 "\t[-p file] [-r file]\n", save_av[0]);
278c4e67
SG
1324
1325 if (help)
1326 fprintf(stderr, "\nArguments:\n"
1327 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n"
1328 "\t-e\tSpecify an environment to be used by the kernel.\n"
1329 "\t-h\tThis list of options.\n"
1330 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n"
1331 "\t-I\tCreate a virtual network device.\n"
1332 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n"
1333 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n"
9bea6114
MC
1334 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n"
1335 "\t \t- numcpus - number of cpus\n"
1336 "\t \t- :lbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1337 "\t \t the logical ID. Controls the number of threads/core (0bits - 1 thread, 1bit - 2 threads).\n"
1338 "\t \t- :cbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1339 "\t \t the core ID. Controls the number of core/package (0bits - 1 core, 1bit - 2 cores).\n"
278c4e67
SG
1340 "\t-p\tSpecify a file in which to store the process ID.\n"
1341 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n"
1342 "\t-s\tBoot into single-user mode.\n"
1343 "\t-U\tEnable writing to kernel memory and module loading.\n"
1344 "\t-v\tTurn on verbose booting.\n");
1345
1346 exit(EX_USAGE);
da673940
JG
1347}
1348
1349void
1350cpu_reset(void)
1351{
1352 kprintf("cpu reset, rebooting vkernel\n");
1353 closefrom(3);
1354 cleanpid();
1355 execv(save_av[0], save_av);
1356}
1357
1358void
1359cpu_halt(void)
1360{
1361 kprintf("cpu halt, exiting vkernel\n");
1362 cleanpid();
278c4e67 1363 exit(EX_OK);
da673940
JG
1364}
1365
1366void
1367setrealcpu(void)
1368{
1369 switch(lwp_cpu_lock) {
1370 case LCL_PER_CPU:
1371 if (bootverbose)
1372 kprintf("Locking CPU%d to real cpu %d\n",
1373 mycpuid, next_cpu);
1374 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1375 next_cpu++;
1376 if (next_cpu >= real_ncpus)
1377 next_cpu = 0;
1378 break;
1379 case LCL_SINGLE_CPU:
1380 if (bootverbose)
1381 kprintf("Locking CPU%d to real cpu %d\n",
1382 mycpuid, next_cpu);
1383 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1384 break;
1385 default:
1386 /* do not map virtual cpus to real cpus */
1387 break;
1388 }
1389}
bf7c5253
MD
1390
1391/*
1392 * Allocate and free memory for module loading. The loaded module
1393 * has to be placed somewhere near the current kernel binary load
1394 * point or the relocations will not work.
1395 *
1396 * I'm not sure why this isn't working.
1397 */
1398int
1399vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes)
1400{
1401 kprintf("module loading for vkernel64's not currently supported\n");
1402 *basep = 0;
1403 return ENOMEM;
1404#if 0
1405#if 1
1406 size_t xtra;
1407 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK;
1408 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra;
1409 bzero((void *)*basep, bytes);
1410#else
1411 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes,
1412 PROT_READ|PROT_WRITE|PROT_EXEC,
1413 MAP_ANON|MAP_SHARED, -1, 0);
1414 if ((void *)*basep == MAP_FAILED)
1415 return ENOMEM;
1416#endif
1417 kprintf("basep %p %p %zd\n",
1418 (void *)vkernel_module_memory_alloc, (void *)*basep, bytes);
1419 return 0;
1420#endif
1421}
1422
1423void
1424vkernel_module_memory_free(vm_offset_t base, size_t bytes)
1425{
1426#if 0
1427#if 0
1428 munmap((void *)base, bytes);
1429#endif
1430#endif
1431}