1 /* $NetBSD: machdep.c,v 1.47 2024/03/05 14:15:30 thorpej Exp $ */
2
3 /*
4 * Copyright 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Copyright (c) 1988 University of Utah.
40 * Copyright (c) 1992, 1993
41 * The Regents of the University of California. All rights reserved.
42 *
43 * This code is derived from software contributed to Berkeley by
44 * the Systems Programming Group of the University of Utah Computer
45 * Science Department, The Mach Operating System project at
46 * Carnegie-Mellon University and Ralph Campbell.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 * notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the University nor the names of its contributors
57 * may be used to endorse or promote products derived from this software
58 * without specific prior written permission.
59 *
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * SUCH DAMAGE.
71 *
72 * @(#)machdep.c 8.3 (Berkeley) 1/12/94
73 * from: Utah Hdr: machdep.c 1.63 91/04/24
74 */
75
76 #include <sys/cdefs.h>
77 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.47 2024/03/05 14:15:30 thorpej Exp $");
78
79 #include "opt_ddb.h"
80 #include "opt_execfmt.h"
81 #include "opt_modular.h"
82
83 #include <sys/param.h>
84 #include <sys/boot_flag.h>
85 #include <sys/buf.h>
86 #include <sys/cpu.h>
87 #include <sys/device.h>
88 #include <sys/kcore.h>
89 #include <sys/kernel.h>
90 #include <sys/ksyms.h>
91 #include <sys/mount.h>
92 #include <sys/reboot.h>
93 #include <sys/systm.h>
94 #include <sys/termios.h>
95
96 #include <uvm/uvm_extern.h>
97
98 #include <dev/cons.h>
99
100 #include "ksyms.h"
101
102 #if NKSYMS || defined(DDB) || defined(MODULAR)
103 #include <mips/db_machdep.h>
104 #include <ddb/db_extern.h>
105 #endif
106
107 #include <machine/yamon.h>
108
109 #include <mips/locore.h>
110 #include <mips/psl.h>
111
112 #include <evbmips/malta/autoconf.h>
113 #include <evbmips/malta/maltareg.h>
114 #include <evbmips/malta/maltavar.h>
115
116 #include "com.h"
117 #if NCOM > 0
118 #include <dev/ic/comreg.h>
119 #include <dev/ic/comvar.h>
120
121 int comcnrate = 38400; /* XXX should be config option */
122 #endif /* NCOM > 0 */
123
124
125 #define REGVAL(x) *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x))))
126
127 struct malta_config malta_configuration;
128
129 /* Maps for VM objects. */
130 struct vm_map *phys_map = NULL;
131
132 int netboot; /* Are we netbooting? */
133
134 yamon_env_var *yamon_envp;
135
136 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
137 int mem_cluster_cnt;
138
139 void configure(void);
140 void mach_init(int, char **, yamon_env_var *, u_long);
141
142 /*
143 * Do all the stuff that locore normally does before calling main().
144 */
145 void
mach_init(int argc,char ** argv,yamon_env_var * envp,u_long memsize)146 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
147 {
148 struct malta_config *mcp = &malta_configuration;
149 uint8_t * const brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES);
150 bus_space_handle_t sh;
151 void *kernend;
152 int freqok;
153
154 extern char edata[], end[];
155
156 CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0);
157
158 *brkres = 0; /* Disable BREAK==reset on console */
159
160 /* Get the propaganda in early! */
161 led_display_str("NetBSD");
162
163 /*
164 * Clear the BSS segment.
165 */
166 kernend = (void *)mips_round_page(end);
167 memset(edata, 0, (char *)kernend - edata);
168
169 /* save the yamon environment pointer */
170 yamon_envp = envp;
171
172 /* Use YAMON callbacks for early console I/O */
173 cn_tab = &yamon_promcd;
174
175 /*
176 * Set up the exception vectors and CPU-specific function
177 * vectors early on. We need the wbflush() vector set up
178 * before comcnattach() is called (or at least before the
179 * first printf() after that is called).
180 * Also clears the I+D caches.
181 */
182 mips_vector_init(NULL, false);
183
184 uvm_md_init();
185
186 physmem = btoc(memsize);
187
188 /*
189 * Use YAMON's CPU frequency if available.
190 */
191 freqok = yamon_setcpufreq(1);
192
193 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt);
194 malta_bus_io_init(&mcp->mc_iot, mcp);
195 malta_bus_mem_init(&mcp->mc_memt, mcp);
196 malta_dma_init(mcp);
197
198 /*
199 * Calibrate the timer if YAMON failed to tell us.
200 */
201 if (!freqok) {
202 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh);
203 malta_cal_timer(&mcp->mc_iot, sh);
204 bus_space_unmap(&mcp->mc_iot, sh, 2);
205 }
206
207 #if NCOM > 0
208 /*
209 * Delay to allow firmware putchars to complete.
210 * FIFO depth * character time.
211 * character time = (1000000 / (defaultrate / 10))
212 */
213 delay(160000000 / comcnrate);
214 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate,
215 COM_FREQ, COM_TYPE_NORMAL,
216 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
217 panic("malta: unable to initialize serial console");
218 #else
219 panic("malta: not configured to use serial console");
220 #endif /* NCOM > 0 */
221
222 mem_clusters[0].start = 0;
223 mem_clusters[0].size = ctob(physmem);
224 mem_cluster_cnt = 1;
225
226 cpu_setmodel("MIPS Malta Evaluation Board");
227
228 /*
229 * XXX: check argv[0] - do something if "gdb"???
230 */
231
232 /*
233 * Look at arguments passed to us and compute boothowto.
234 */
235 boothowto = RB_AUTOBOOT;
236 #ifndef _LP64
237 for (int i = 1; i < argc; i++) {
238 for (char *cp = argv[i]; *cp; cp++) {
239 int howto;
240 /* Ignore superfluous '-', if there is one */
241 if (*cp == '-')
242 continue;
243
244 howto = 0;
245 BOOT_FLAG(*cp, howto);
246 if (! howto)
247 printf("bootflag '%c' not recognised\n", *cp);
248 else
249 boothowto |= howto;
250 }
251 }
252 #endif
253
254 /*
255 * Load the rest of the available pages into the VM system.
256 */
257 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
258 mem_clusters, mem_cluster_cnt, NULL, 0);
259
260 /*
261 * Initialize error message buffer (at end of core).
262 */
263 mips_init_msgbuf();
264
265 pmap_bootstrap();
266
267 /*
268 * Allocate uarea page for lwp0 and set it.
269 */
270 mips_init_lwp0_uarea();
271
272 /*
273 * Initialize debuggers, and break into them, if appropriate.
274 */
275 #if defined(DDB)
276 if (boothowto & RB_KDB)
277 Debugger();
278 #endif
279
280 #if defined(MULTIPROCESSOR) && 0
281 /*
282 * We can never be running on more than one processor but we can dream.
283 */
284 mips_fixup_exceptions(mips_fixup_zero_relative, NULL);
285 #endif
286 }
287
288 void
consinit(void)289 consinit(void)
290 {
291
292 /*
293 * Everything related to console initialization is done
294 * in mach_init().
295 */
296 }
297
298 /*
299 * Allocate memory for variable-sized tables,
300 */
301 void
cpu_startup(void)302 cpu_startup(void)
303 {
304 /*
305 * Do the common startup items.
306 */
307 cpu_startup_common();
308
309 /*
310 * Virtual memory is bootstrapped -- notify the bus spaces
311 * that memory allocation is now safe.
312 */
313 malta_configuration.mc_mallocsafe = 1;
314 }
315
316 int waittime = -1;
317
318 void
cpu_reboot(int howto,char * bootstr)319 cpu_reboot(int howto, char *bootstr)
320 {
321
322 /* Take a snapshot before clobbering any registers. */
323 savectx(curpcb);
324
325 if (cold) {
326 howto |= RB_HALT;
327 goto haltsys;
328 }
329
330 /* If "always halt" was specified as a boot flag, obey. */
331 if (boothowto & RB_HALT)
332 howto |= RB_HALT;
333
334 boothowto = howto;
335 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
336 waittime = 0;
337 vfs_shutdown();
338 }
339
340 splhigh();
341
342 if (howto & RB_DUMP)
343 dumpsys();
344
345 haltsys:
346 doshutdownhooks();
347
348 pmf_system_shutdown(boothowto);
349
350 if (howto & RB_HALT) {
351 printf("\n");
352 printf("The operating system has halted.\n");
353 printf("Please press any key to reboot.\n\n");
354 cnpollc(1); /* For proper keyboard command handling */
355 cngetc();
356 cnpollc(0);
357 }
358
359 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
360 yamon_exit(boothowto);
361 printf("Oops, back from yamon_exit()\n\nResetting...");
362
363 REGVAL(MALTA_SOFTRES) = MALTA_GORESET;
364
365 /*
366 * Need a small delay here, otherwise we see the first few characters of
367 * the warning below.
368 */
369 delay(80000);
370
371 printf("WARNING: reset failed!\nSpinning...");
372
373 for (;;)
374 /* spin forever */ ; /* XXX */
375 }
376