1 /* $NetBSD: machdep.c,v 1.126 2024/03/05 14:15:32 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1999 Shin Takemura, All rights reserved.
5 * Copyright (c) 1999-2001 SATO Kazumi, All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 */
31
32 /*
33 * Copyright (c) 1988 University of Utah.
34 * Copyright (c) 1992, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * This code is derived from software contributed to Berkeley by
38 * the Systems Programming Group of the University of Utah Computer
39 * Science Department, The Mach Operating System project at
40 * Carnegie-Mellon University and Ralph Campbell.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * from: Utah Hdr: machdep.c 1.63 91/04/24
67 *
68 * @(#)machdep.c 8.3 (Berkeley) 1/12/94
69 */
70
71 #include <sys/cdefs.h>
72 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.126 2024/03/05 14:15:32 thorpej Exp $");
73
74 #include "opt_vr41xx.h"
75 #include "opt_tx39xx.h"
76 #include "opt_boot_standalone.h"
77 #include "opt_modular.h"
78 #include "opt_spec_platform.h"
79 #include "biconsdev.h"
80 #include "opt_ddb.h"
81 #include "opt_kgdb.h"
82 #include "opt_rtc_offset.h"
83 #include "opt_kloader.h"
84 #include "opt_kloader_kernel_path.h"
85 #include "debug_hpc.h"
86 #include "opt_md.h"
87 #include "opt_memsize.h"
88 #include "opt_no_symbolsz_entry.h"
89
90 #include <sys/param.h>
91 #include <sys/systm.h>
92 #include <sys/kernel.h>
93 #include <sys/buf.h>
94 #include <sys/reboot.h>
95 #include <sys/mount.h>
96 #include <sys/boot_flag.h>
97 #include <sys/ksyms.h>
98 #include <sys/device.h>
99 #include <sys/lwp.h>
100 #include <sys/cpu.h>
101
102 #include <uvm/uvm_extern.h>
103
104 #include <ufs/mfs/mfs_extern.h> /* mfs_initminiroot() */
105 #include <dev/cons.h> /* cntab access (cpu_reboot) */
106
107 #include <machine/locore.h>
108 #include <machine/psl.h>
109 #include <machine/sysconf.h>
110 #include <machine/platid.h>
111 #include <machine/platid_mask.h>
112 #include <machine/kloader.h>
113 #include <machine/debug.h>
114
115 #ifdef KGDB
116 #include <sys/kgdb.h>
117 #endif
118
119 #include "ksyms.h"
120
121 #if NKSYMS || defined(DDB) || defined(MODULAR)
122 #include <machine/db_machdep.h>
123 #include <ddb/db_sym.h>
124 #include <ddb/db_extern.h>
125 #include <sys/exec_elf.h>
126 #endif
127
128 #if NBICONSDEV > 0
129 #include <sys/conf.h>
130 #include <dev/hpc/biconsvar.h>
131 #include <dev/hpc/bicons.h>
132 #define biconscnpollc nullcnpollc
133 cons_decl(bicons);
134 static struct consdev bicons __attribute((__unused__)) = cons_init(bicons);
135 static int __bicons_enable;
136 #define DPRINTF(arg) { if (__bicons_enable) printf arg; }
137 #else /* NBICONSDEV > 0 */
138 #define DPRINTF(arg)
139 #endif /* NBICONSDEV > 0 */
140
141 #include <nfs/rpcv2.h>
142 #include <nfs/nfsproto.h>
143 #include <nfs/nfs.h>
144 #include <nfs/nfsmount.h>
145
146 #ifdef MEMORY_DISK_DYNAMIC
147 #include <dev/md.h>
148 #endif
149
150 /* the following is used externally (sysctl_hw) */
151 static char hpcmips_cpuname[40]; /* set CPU depend xx_init() */
152
153 int cpuspeed = 1; /* approx # instr per usec. */
154
155 /* CPU core switch table */
156 struct platform platform;
157 #ifdef VR41XX
158 extern void vr_init(void);
159 #endif
160 #ifdef TX39XX
161 extern void tx_init(void);
162 #endif
163
164 /* boot environment */
165 static struct bootinfo bi_copy;
166 struct bootinfo *bootinfo;
167 char booted_kernel[128];
168 extern void makebootdev(const char *);
169 #ifdef KLOADER
170 #if !defined(KLOADER_KERNEL_PATH)
171 #define KLOADER_KERNEL_PATH "/netbsd"
172 #endif /* !KLOADER_KERNEL_PATH */
173 static char kernel_path[] = KLOADER_KERNEL_PATH;
174 #endif /* KLOADER */
175
176 /* maps for VM objects */
177 struct vm_map *phys_map;
178
179 /* physical memory */
180 int mem_cluster_cnt;
181 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
182
183 void mach_init(int, char *[], struct bootinfo *);
184
185 #ifdef DEBUG
186 /* stacktrace code violates prototypes to get callee's registers */
187 extern void stacktrace(void); /*XXX*/
188 #endif
189
190 /*
191 * Do all the stuff that locore normally does before calling main().
192 * Process arguments passed to us by the boot loader.
193 * Return the first page address following the system.
194 */
195 void
mach_init(int argc,char * argv[],struct bootinfo * bi)196 mach_init(int argc, char *argv[], struct bootinfo *bi)
197 {
198 /*
199 * this routines stack is never polluted since stack pointer
200 * is lower than kernel text segment, and at exiting, stack pointer
201 * is changed to proc0.
202 */
203 #ifdef KLOADER
204 struct kloader_bootinfo kbi;
205 #endif
206 extern char edata[], end[];
207 #if NKSYMS || defined(DDB) || defined(MODULAR)
208 extern void *esym;
209 #endif
210 void *kernend;
211 char *cp;
212 int i;
213
214 /* clear the BSS segment */
215 #if NKSYMS || defined(DDB) || defined(MODULAR)
216 size_t symbolsz = 0;
217 Elf_Ehdr *eh = (void *)end;
218 if (memcmp(eh->e_ident, ELFMAG, SELFMAG) == 0 &&
219 eh->e_ident[EI_CLASS] == ELFCLASS) {
220 esym = end;
221 #ifndef NO_SYMBOLSZ_ENTRY
222 if (eh->e_entry != 0) {
223 /* pbsdboot */
224 symbolsz = eh->e_entry;
225 } else
226 #endif
227 {
228 /* hpcboot */
229 Elf_Shdr *sh = (void *)(end + eh->e_shoff);
230 for(i = 0; i < eh->e_shnum; i++, sh++)
231 if (sh->sh_offset > 0 &&
232 (sh->sh_offset + sh->sh_size) > symbolsz)
233 symbolsz = sh->sh_offset + sh->sh_size;
234 }
235 esym = (char*)esym + symbolsz;
236 kernend = (void *)mips_round_page(esym);
237 memset(edata, 0, end - edata);
238 } else
239 #endif /* NKSYMS || defined(DDB) || defined(MODULAR) */
240 {
241 kernend = (void *)mips_round_page(end);
242 memset(edata, 0, (char *)kernend - edata);
243 }
244
245 #if defined(BOOT_STANDALONE)
246 #if !defined (SPEC_PLATFORM) || SPEC_PLATFORM == 1
247 #error specify SPEC_PLATFORM=platid_mask_MACH_xxx_yyy in BOOT_STANDALONE case.
248 #error see platid_mask.c for platid_mask_MACH_xxx_yyy.
249 #else
250 memcpy(&platid, &SPEC_PLATFORM, sizeof(platid));
251 #endif
252 #endif /* defined(BOOT_STANDALONE) && defined(SPEC_PLATFORM) */
253 /*
254 * Arguments are set up by boot loader.
255 */
256 if (bi && bi->magic == BOOTINFO_MAGIC) {
257 memset(&bi_copy, 0, sizeof(struct bootinfo));
258 memcpy(&bi_copy, bi, uimin(bi->length, sizeof(struct bootinfo)));
259 bootinfo = &bi_copy;
260 if (bootinfo->platid_cpu != 0) {
261 platid.dw.dw0 = bootinfo->platid_cpu;
262 }
263 if (bootinfo->platid_machine != 0) {
264 platid.dw.dw1 = bootinfo->platid_machine;
265 }
266 }
267 /* copy boot parameter for kloader */
268 #ifdef KLOADER
269 kloader_bootinfo_set(&kbi, argc, argv, bi, false);
270 #endif
271
272 /*
273 * CPU core Specific Function Hooks
274 */
275 #if defined(VR41XX) && defined(TX39XX)
276 if (platid_match(&platid, &platid_mask_CPU_MIPS_VR_41XX))
277 vr_init();
278 else if (platid_match(&platid, &platid_mask_CPU_MIPS_TX_3900) ||
279 platid_match(&platid, &platid_mask_CPU_MIPS_TX_3920))
280 tx_init();
281 #elif defined(VR41XX)
282 vr_init();
283 #elif defined(TX39XX)
284 tx_init();
285 #else
286 #error "define TX39XX and/or VR41XX"
287 #endif
288
289 #if NBICONSDEV > 0
290 /*
291 * bicons don't need actual device initialize. only bootinfo needed.
292 */
293 __bicons_enable = (bicons_init(&bicons) == 0);
294 if (__bicons_enable)
295 cn_tab = &bicons;
296 #endif
297
298 /* Initialize frame buffer (to steal DMA buffer, stay here.) */
299 #ifdef HPC_DEBUG_LCD
300 dbg_lcd_test();
301 #endif
302 (*platform.fb_init)(&kernend);
303 kernend = (void *)mips_round_page(kernend);
304
305 /*
306 * Set the VM page size.
307 */
308 uvmexp.pagesize = NBPG; /* Notify the VM system of our page size. */
309 uvm_md_init();
310
311 /*
312 * Copy exception-dispatch code down to exception vector.
313 * Initialize locore-function vector.
314 * Clear out the I and D caches.
315 */
316 mips_vector_init(NULL, false);
317 intr_init();
318
319 #ifdef DEBUG
320 /*
321 * Look at arguments passed to us and compute boothowto.
322 */
323 if (bootinfo) {
324 DPRINTF(("Bootinfo. available, "));
325 }
326 DPRINTF(("args: "));
327 for (i = 0; i < argc; i++) {
328 DPRINTF(("%s ", argv[i]));
329 }
330 DPRINTF(("\n"));
331 DPRINTF(("platform ID: %08lx %08lx\n", platid.dw.dw0, platid.dw.dw1));
332 #endif /* DEBUG */
333
334 #ifndef RTC_OFFSET
335 /*
336 * rtc_offset from bootinfo.timezone set by pbsdboot.exe
337 */
338 if (rtc_offset == 0 && bootinfo
339 && bootinfo->timezone > (-12*60)
340 && bootinfo->timezone <= (12*60))
341 rtc_offset = bootinfo->timezone;
342 #endif /* RTC_OFFSET */
343
344 /* Compute bootdev */
345 makebootdev("wd0"); /* default boot device */
346
347 boothowto = 0;
348 #ifdef KADB
349 boothowto |= RB_KDB;
350 #endif
351 strncpy(booted_kernel, argv[0], sizeof(booted_kernel));
352 booted_kernel[sizeof(booted_kernel)-1] = 0;
353 for (i = 1; i < argc; i++) {
354 for (cp = argv[i]; *cp; cp++) {
355 switch (*cp) {
356 case 'h': /* XXX, serial console */
357 bootinfo->bi_cnuse |= BI_CNUSE_SERIAL;
358 break;
359
360 case 'b':
361 /* boot device: -b=sd0 etc. */
362 if (strcmp(cp+2, "nfs") == 0)
363 rootfstype = MOUNT_NFS;
364 else
365 makebootdev(cp+2);
366 cp += strlen(cp);
367 break;
368 default:
369 BOOT_FLAG(*cp, boothowto);
370 break;
371 }
372 }
373 }
374 /*
375 * Check to see if a mini-root was loaded into memory. It resides
376 * at the start of the next page just after the end of BSS.
377 */
378 if (boothowto & RB_MINIROOT) {
379 size_t fssz;
380 fssz = round_page(mfs_initminiroot(kernend));
381 #ifdef MEMORY_DISK_DYNAMIC
382 md_root_setconf(kernend, fssz);
383 #endif /* MEMORY_DISK_DYNAMIC */
384 kernend = (char *)kernend + fssz;
385 }
386
387 #if NKSYMS || defined(DDB) || defined(MODULAR)
388 /* init symbols if present */
389 if (esym)
390 ksyms_addsyms_elf(symbolsz, &end, esym);
391 #endif /* DDB */
392
393 /* Initialize console and KGDB serial port. */
394 (*platform.cons_init)();
395
396 #if defined(DDB) || defined(KGDB)
397 if (boothowto & RB_KDB) {
398 #ifdef DDB
399 Debugger();
400 #endif /* DDB */
401 #ifdef KGDB
402 kgdb_debug_init = 1;
403 kgdb_connect(1);
404 #endif /* KGDB */
405 }
406 #endif /* DDB || KGDB */
407
408 /* Find physical memory regions. */
409 #ifdef MEMSIZE
410 mem_clusters[0].start = 0;
411 mem_clusters[0].size = (paddr_t) kernend - MIPS_KSEG0_START;
412 mem_clusters[1].start = (paddr_t) kernend - MIPS_KSEG0_START;
413 mem_clusters[1].size = MEMSIZE * 0x100000 - mem_clusters[1].start;
414 mem_cluster_cnt = 2;
415 #else
416 (*platform.mem_init)((paddr_t)kernend - MIPS_KSEG0_START);
417 #endif
418 /*
419 * Clear currently unused D-RAM area
420 * (For reboot Windows CE clearly)
421 */
422 {
423 u_int32_t sp;
424 __asm volatile("move %0, $29" : "=r"(sp));
425 KDASSERT(sp > KERNBASE + 0x400);
426 memset((void *)(KERNBASE + 0x400), 0, sp - (KERNBASE + 0x400) - 64);
427 }
428
429 printf("mem_cluster_cnt = %d\n", mem_cluster_cnt);
430 physmem = 0;
431 for (i = 0; i < mem_cluster_cnt; i++) {
432 printf("mem_clusters[%d] = {%#"PRIxPADDR",%#"PRIxPSIZE"}\n", i,
433 (paddr_t)mem_clusters[i].start,
434 (psize_t)mem_clusters[i].size);
435 physmem += atop(mem_clusters[i].size);
436 }
437
438 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
439 mem_clusters, mem_cluster_cnt, NULL, 0);
440
441 /*
442 * Initialize error message buffer (at end of core).
443 */
444 mips_init_msgbuf();
445
446 /*
447 * Initialize the virtual memory system.
448 */
449 pmap_bootstrap();
450
451 /*
452 * Initialize lwp0's uarea.
453 */
454 mips_init_lwp0_uarea();
455 }
456
457 int
cpuname_printf(const char * fmt,...)458 cpuname_printf(const char *fmt, ...)
459 {
460 int len;
461 va_list ap;
462
463 va_start(ap, fmt);
464 len = vsnprintf(hpcmips_cpuname, sizeof(hpcmips_cpuname), fmt, ap);
465 va_end(ap);
466
467 return len;
468 }
469
470 /*
471 * Machine-dependent startup code.
472 * allocate memory for variable-sized tables, initialize CPU.
473 */
474 void
cpu_startup(void)475 cpu_startup(void)
476 {
477 cpu_setmodel("%s (%s)", platid_name(&platid), hpcmips_cpuname);
478
479 /* show again when verbose mode */
480 aprint_verbose("total memory banks = %d\n", mem_cluster_cnt);
481 for (size_t i = 0; i < mem_cluster_cnt; i++) {
482 aprint_verbose("memory bank %zu = "
483 "%#08"PRIxPADDR" %"PRIdPSIZE"KB(%#"PRIxPSIZE")\n", i,
484 (paddr_t)mem_clusters[i].start,
485 (psize_t)mem_clusters[i].size/1024,
486 (psize_t)mem_clusters[i].size);
487 }
488
489 cpu_startup_common();
490 }
491
492 void
cpu_reboot(int howto,char * bootstr)493 cpu_reboot(int howto, char *bootstr)
494 {
495
496 /* take a snap shot before clobbering any registers */
497 savectx(curpcb);
498
499 #ifdef DEBUG
500 if (panicstr)
501 stacktrace();
502 #endif
503
504 /* If system is cold, just halt. */
505 if (cold) {
506 howto |= RB_HALT;
507 goto haltsys;
508 }
509
510 /* If "always halt" was specified as a boot flag, obey. */
511 if ((boothowto & RB_HALT) != 0) {
512 howto |= RB_HALT;
513 }
514
515 #ifdef KLOADER
516 if ((howto & RB_HALT) == 0) {
517 if (howto & RB_STRING)
518 kloader_reboot_setup(bootstr);
519 else
520 kloader_reboot_setup(kernel_path);
521 }
522 #endif
523
524 boothowto = howto;
525 if ((howto & RB_NOSYNC) == 0) {
526 /*
527 * Synchronize the disks....
528 */
529 vfs_shutdown();
530 }
531
532 /* Disable interrupts. */
533 splhigh();
534
535 /* If rebooting and a dump is requested do it. */
536 if (howto & RB_DUMP)
537 dumpsys();
538
539 haltsys:
540
541 /* run any shutdown hooks */
542 doshutdownhooks();
543
544 pmf_system_shutdown(boothowto);
545
546 /* Finally, halt/reboot the system. */
547 if (howto & RB_HALT) {
548 printf("halted.\n");
549 } else {
550 #ifdef KLOADER
551 kloader_reboot();
552 /* NOTREACHED */
553 #endif
554 }
555
556 (*platform.reboot)(howto, bootstr);
557 while(1)
558 ;
559 /*NOTREACHED*/
560 }
561
562 void
consinit(void)563 consinit(void)
564 {
565 /* platform.cons_init() do it */
566 }
567