1 /* $NetBSD: machdep.c,v 1.8 2024/03/05 14:15:31 thorpej Exp $ */
2
3 /*
4 * Copyright 2000, 2001
5 * Broadcom Corporation. All rights reserved.
6 *
7 * This software is furnished under license and may be used and copied only
8 * in accordance with the following terms and conditions. Subject to these
9 * conditions, you may download, copy, install, use, modify and distribute
10 * modified or unmodified copies of this software in source and/or binary
11 * form. No title or ownership is transferred hereby.
12 *
13 * 1) Any source code used, modified or distributed must reproduce and
14 * retain this copyright notice and list of conditions as they appear in
15 * the source file.
16 *
17 * 2) No right is granted to use any trade name, trademark, or logo of
18 * Broadcom Corporation. The "Broadcom Corporation" name may not be
19 * used to endorse or promote products derived from this software
20 * without the prior written permission of Broadcom Corporation.
21 *
22 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
25 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
26 * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
27 * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
32 * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /*
36 * Copyright (c) 2000 Soren S. Jorvang. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions, and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * SUCH DAMAGE.
58 */
59
60 #include <sys/cdefs.h>
61 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.8 2024/03/05 14:15:31 thorpej Exp $");
62
63 #include "opt_ddb.h"
64 #include "opt_execfmt.h"
65 #include "opt_modular.h"
66
67 #include <sys/param.h>
68 #include <sys/buf.h>
69 #include <sys/conf.h>
70 #include <sys/cpu.h>
71 #include <sys/device.h>
72 #include <sys/exec.h>
73 #include <sys/file.h>
74 #include <sys/intr.h>
75 #include <sys/kcore.h>
76 #include <sys/kernel.h>
77 #include <sys/ksyms.h>
78 #include <sys/mbuf.h>
79 #include <sys/mount.h>
80 #include <sys/msgbuf.h>
81 #include <sys/proc.h>
82 #include <sys/reboot.h>
83 #include <sys/syscallargs.h>
84 #include <sys/systm.h>
85
86 #include <uvm/uvm_extern.h>
87
88 #include <mips/locore.h>
89 #include <mips/psl.h>
90 #include <mips/pte.h>
91 #include <mips/reg.h>
92
93 #include <mips/cfe/cfe_api.h>
94
95 #include <evbmips/sbmips/autoconf.h>
96 #include <evbmips/sbmips/swarm.h>
97 #include <evbmips/sbmips/systemsw.h>
98
99 #if 0 /* XXXCGD */
100 #include <evbmips/sbmips/nvram.h>
101 #endif /* XXXCGD */
102 #include <evbmips/sbmips/leds.h>
103
104 #include <mips/sibyte/dev/sbbuswatchvar.h>
105
106 #include "ksyms.h"
107
108 #if NKSYMS || defined(DDB) || defined(MODULAR)
109 #include <mips/db_machdep.h>
110 #include <ddb/db_access.h>
111 #include <ddb/db_sym.h>
112 #include <ddb/db_extern.h>
113 #include <sys/exec_elf.h>
114 #endif
115
116 #include <dev/cons.h>
117
118 #if NKSYMS || defined(DDB) || defined(MODULAR)
119 /* start and end of kernel symbol table */
120 void *ksym_start, *ksym_end;
121 #endif
122
123 /* Maps for VM objects. */
124 struct vm_map *phys_map = NULL;
125
126 char bootstring[512]; /* Boot command */
127 int netboot; /* Are we netbooting? */
128 int cfe_present;
129
130 struct bootinfo_v1 bootinfo;
131
132 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
133 int mem_cluster_cnt;
134
135 void configure(void);
136 void mach_init(long, long, long, long);
137
138 extern void *esym;
139
140 #ifdef _LP64
141 /*
142 * We do this KSEG0 to PHYS to KSEG0 dance if running 64-bit because
143 * CFE passes in parameters as 32-bit addresses. When used as a 64-bit
144 * address these CFE parameters are in user (XKUSEG) space and can't be
145 * accessed! Convert these to a physical address and and then to the
146 * proper KSEG0 address so we can use them in the kernel.
147 */
148 #define CFE_TO_KERNEL_PTR(x) MIPS_PHYS_TO_KSEG0(MIPS_KSEG0_TO_PHYS(x))
149 #else
150 #define CFE_TO_KERNEL_PTR(x) (x)
151 #endif
152
153 /*
154 * Do all the stuff that locore normally does before calling main().
155 */
156 void
mach_init(long fwhandle,long magic,long bootdata,long reserved)157 mach_init(long fwhandle, long magic, long bootdata, long reserved)
158 {
159 void *kernend;
160 extern char edata[], end[];
161 uint32_t config;
162
163 /* XXX this code must run on the target CPU */
164 config = mips3_cp0_config_read();
165 config &= ~MIPS3_CONFIG_K0_MASK;
166 config |= 0x05; /* XXX. cacheable coherent */
167 mips3_cp0_config_write(config);
168
169 /* Zero BSS. XXXCGD: uh, is this really necessary still? */
170 memset(edata, 0, end - edata);
171
172 /*
173 * Copy the bootinfo structure from the boot loader.
174 * this has to be done before mips_vector_init is
175 * called because we may need CFE's TLB handler
176 */
177
178 if (magic == BOOTINFO_MAGIC)
179 memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
180 sizeof bootinfo);
181 else if (reserved == CFE_EPTSEAL) {
182 magic = BOOTINFO_MAGIC;
183 memset(&bootinfo, 0, sizeof bootinfo);
184 bootinfo.version = BOOTINFO_VERSION;
185 bootinfo.fwhandle = fwhandle;
186 bootinfo.fwentry = bootdata;
187 bootinfo.ssym = (vaddr_t)end;
188 bootinfo.esym = (vaddr_t)end;
189 }
190
191 kernend = (void *)mips_round_page(end);
192 #if NKSYMS || defined(DDB) || defined(MODULAR)
193 if (magic == BOOTINFO_MAGIC) {
194 ksym_start = (void *)CFE_TO_KERNEL_PTR(bootinfo.ssym);
195 ksym_end = (void *)CFE_TO_KERNEL_PTR(bootinfo.esym);
196 kernend = (void *)mips_round_page((vaddr_t)ksym_end);
197 }
198 #endif
199
200 consinit();
201
202 uvm_md_init();
203
204 /*
205 * Copy exception-dispatch code down to exception vector.
206 * Initialize locore-function vector.
207 * Clear out the I and D caches.
208 */
209 #ifdef MULTIPROCESSOR
210 mips_vector_init(NULL, true);
211 #else
212 mips_vector_init(NULL, false);
213 #endif
214
215 mips_locoresw.lsw_bus_error = sibyte_bus_watch_check;
216
217 sb1250_ipl_map_init();
218
219 #ifdef DEBUG
220 printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n",
221 (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved);
222 #endif
223
224 cpu_setmodel("sb1250");
225
226 if (magic == BOOTINFO_MAGIC) {
227 int idx;
228 int added;
229 uint64_t start, len, type;
230
231 cfe_init(CFE_TO_KERNEL_PTR(bootinfo.fwhandle),
232 CFE_TO_KERNEL_PTR(bootinfo.fwentry));
233 cfe_present = 1;
234
235 idx = 0;
236 physmem = 0;
237 mem_cluster_cnt = 0;
238 while (cfe_enummem(idx, 0, &start, &len, &type) == 0) {
239 added = 0;
240 printf("Memory Block #%d start %08"PRIx64" len %08"PRIx64": %s: ",
241 idx, start, len, (type == CFE_MI_AVAILABLE) ?
242 "Available" : "Reserved");
243 if ((type == CFE_MI_AVAILABLE) &&
244 (mem_cluster_cnt < VM_PHYSSEG_MAX)) {
245 /*
246 * XXX Ignore memory above 256MB for now, it
247 * XXX needs special handling.
248 */
249 if (start < (256*1024*1024)) {
250 physmem += btoc(((int) len));
251 mem_clusters[mem_cluster_cnt].start =
252 (long) start;
253 mem_clusters[mem_cluster_cnt].size =
254 (long) len;
255 mem_cluster_cnt++;
256 added = 1;
257 }
258 }
259 if (added)
260 printf("added to map\n");
261 else
262 printf("not added to map\n");
263 idx++;
264 }
265
266 } else {
267 /*
268 * Handle the case of not being called from the firmware.
269 */
270 /* XXX hardwire to 32MB; should be kernel config option */
271 physmem = 32 * 1024 * 1024 / 4096;
272 mem_clusters[0].start = 0;
273 mem_clusters[0].size = ctob(physmem);
274 mem_cluster_cnt = 1;
275 }
276
277
278 for (u_int i = 0; i < sizeof(bootinfo.boot_flags); i++) {
279 switch (bootinfo.boot_flags[i]) {
280 case '\0':
281 break;
282 case ' ':
283 continue;
284 case '-':
285 while (bootinfo.boot_flags[i] != ' ' &&
286 bootinfo.boot_flags[i] != '\0') {
287 switch (bootinfo.boot_flags[i]) {
288 case 'a':
289 boothowto |= RB_ASKNAME;
290 break;
291 case 'd':
292 boothowto |= RB_KDB;
293 break;
294 case 's':
295 boothowto |= RB_SINGLE;
296 break;
297 }
298 i++;
299 }
300 }
301 }
302
303 /*
304 * Load the rest of the available pages into the VM system.
305 */
306 mips_page_physload(MIPS_KSEG0_START, (vaddr_t) kernend,
307 mem_clusters, mem_cluster_cnt, NULL, 0);
308
309 /*
310 * Initialize error message buffer (at end of core).
311 */
312 mips_init_msgbuf();
313
314 pmap_bootstrap();
315
316 /*
317 * Allocate uarea for lwp0 and set it.
318 */
319 mips_init_lwp0_uarea();
320
321 /*
322 * Initialize debuggers, and break into them, if appropriate.
323 */
324 #if NKSYMS || defined(DDB) || defined(MODULAR)
325 ksyms_addsyms_elf(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
326 ksym_start, ksym_end);
327 #endif
328
329 if (boothowto & RB_KDB) {
330 #if defined(DDB)
331 Debugger();
332 #endif
333 }
334
335 #ifdef MULTIPROCESSOR
336 mips_fixup_exceptions(mips_fixup_zero_relative, NULL);
337 #endif
338 }
339
340 /*
341 * Allocate memory for variable-sized tables,
342 */
343 void
cpu_startup(void)344 cpu_startup(void)
345 {
346 /*
347 * Just do the common stuff.
348 */
349 cpu_startup_common();
350 }
351
352 int waittime = -1;
353
354 void
cpu_reboot(int howto,char * bootstr)355 cpu_reboot(int howto, char *bootstr)
356 {
357
358 /* Take a snapshot before clobbering any registers. */
359 savectx(curpcb);
360
361 if (cold) {
362 howto |= RB_HALT;
363 goto haltsys;
364 }
365
366 /* If "always halt" was specified as a boot flag, obey. */
367 if (boothowto & RB_HALT)
368 howto |= RB_HALT;
369
370 boothowto = howto;
371 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
372 waittime = 0;
373 vfs_shutdown();
374 }
375
376 splhigh();
377
378 if (howto & RB_DUMP)
379 dumpsys();
380
381 haltsys:
382 doshutdownhooks();
383
384 pmf_system_shutdown(boothowto);
385
386 if (howto & RB_HALT) {
387 printf("\n");
388 printf("The operating system has halted.\n");
389 printf("Please press any key to reboot.\n\n");
390 cnpollc(1); /* For proper keyboard command handling */
391 cngetc();
392 cnpollc(0);
393 }
394
395 printf("rebooting...\n\n");
396
397 if (cfe_present) {
398 /*
399 * XXX
400 * For some reason we can't return to CFE with
401 * and do a warm start. Need to look into this...
402 */
403 cfe_exit(0, (howto & RB_DUMP) ? 1 : 0);
404 printf("cfe_exit didn't!\n");
405 }
406
407 printf("WARNING: reboot failed!\n");
408
409 for (;;);
410 }
411
412 static void
cswarm_setled(u_int index,char c)413 cswarm_setled(u_int index, char c)
414 {
415 volatile u_char *led_ptr =
416 (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS);
417
418 if (index < 4)
419 led_ptr[0x20 + ((3 - index) << 3)] = c;
420 }
421
422 void
cswarm_setleds(const char * str)423 cswarm_setleds(const char *str)
424 {
425 int i;
426
427 for (i = 0; i < 4 && str[i]; i++)
428 cswarm_setled(i, str[i]);
429 for (; i < 4; i++)
430 cswarm_setled(' ', str[i]);
431 }
432
433 int
sbmips_cca_for_pa(paddr_t pa)434 sbmips_cca_for_pa(paddr_t pa)
435 {
436 int rv;
437
438 rv = 2; /* Uncached. */
439
440 /* Check each DRAM region. */
441 if ((pa >= 0x0000000000 && pa <= 0x000fffffff) || /* DRAM 0 */
442 (pa >= 0x0080000000 && pa <= 0x008fffffff) || /* DRAM 1 */
443 (pa >= 0x0090000000 && pa <= 0x009fffffff) || /* DRAM 2 */
444 (pa >= 0x00c0000000 && pa <= 0x00cfffffff) || /* DRAM 3 */
445 #ifdef _MIPS_PADDR_T_64BIT
446 (pa >= 0x0100000000LL && pa <= 0x07ffffffffLL) || /* DRAM exp */
447 #endif
448 0) {
449 rv = 5; /* Cacheable coherent. */
450 }
451
452 return (rv);
453 }
454