1 /* $NetBSD: machdep.c,v 1.34 2024/03/05 14:15:30 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2006 Urbana-Champaign Independent Media Center.
5 * Copyright (c) 2006 Garrett D'Amore.
6 * All rights reserved.
7 *
8 * Portions of this code were written by Garrett D'Amore for the
9 * Champaign-Urbana Community Wireless Network Project.
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer in the documentation and/or other materials provided
19 * with the distribution.
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgements:
22 * This product includes software developed by the Urbana-Champaign
23 * Independent Media Center.
24 * This product includes software developed by Garrett D'Amore.
25 * 4. Urbana-Champaign Independent Media Center's name and Garrett
26 * D'Amore's name may not be used to endorse or promote products
27 * derived from this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
30 * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
34 * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43 /*-
44 * Copyright (c) 2006 Itronix Inc.
45 * All rights reserved.
46 *
47 * Portions written by Garrett D'Amore for Itronix Inc.
48 *
49 * Redistribution and use in source and binary forms, with or without
50 * modification, are permitted provided that the following conditions
51 * are met:
52 * 1. Redistributions of source code must retain the above copyright
53 * notice, this list of conditions and the following disclaimer.
54 * 2. Redistributions in binary form must reproduce the above copyright
55 * notice, this list of conditions and the following disclaimer in the
56 * documentation and/or other materials provided with the distribution.
57 * 3. The name of Itronix Inc. may not be used to endorse
58 * or promote products derived from this software without specific
59 * prior written permission.
60 *
61 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
63 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
64 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
65 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
66 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
67 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
68 * ON ANY THEORY OF LIABILITY, WHETHER IN
69 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
70 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
71 * POSSIBILITY OF SUCH DAMAGE.
72 */
73
74 /*
75 * Copyright (c) 1988 University of Utah.
76 * Copyright (c) 1992, 1993
77 * The Regents of the University of California. All rights reserved.
78 *
79 * This code is derived from software contributed to Berkeley by
80 * the Systems Programming Group of the University of Utah Computer
81 * Science Department, The Mach Operating System project at
82 * Carnegie-Mellon University and Ralph Campbell.
83 *
84 * Redistribution and use in source and binary forms, with or without
85 * modification, are permitted provided that the following conditions
86 * are met:
87 * 1. Redistributions of source code must retain the above copyright
88 * notice, this list of conditions and the following disclaimer.
89 * 2. Redistributions in binary form must reproduce the above copyright
90 * notice, this list of conditions and the following disclaimer in the
91 * documentation and/or other materials provided with the distribution.
92 * 3. Neither the name of the University nor the names of its contributors
93 * may be used to endorse or promote products derived from this software
94 * without specific prior written permission.
95 *
96 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
97 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
98 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
99 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
100 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
101 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
102 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
103 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
104 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
105 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
106 * SUCH DAMAGE.
107 *
108 * @(#)machdep.c 8.3 (Berkeley) 1/12/94
109 * from: Utah Hdr: machdep.c 1.63 91/04/24
110 */
111
112 #include <sys/cdefs.h>
113 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.34 2024/03/05 14:15:30 thorpej Exp $");
114
115 #include "opt_ddb.h"
116 #include "opt_kgdb.h"
117 #include "opt_modular.h"
118
119 #include <sys/param.h>
120 #include <sys/boot_flag.h>
121 #include <sys/device.h>
122 #include <sys/kernel.h>
123 #include <sys/kcore.h>
124 #include <sys/ksyms.h>
125 #include <sys/mount.h>
126 #include <sys/reboot.h>
127 #include <sys/cpu.h>
128
129 #include <uvm/uvm_extern.h>
130
131 #include <dev/cons.h>
132
133 #include "ksyms.h"
134
135 #if NKSYMS || defined(DDB) || defined(MODULAR)
136 #include <mips/db_machdep.h>
137 #include <ddb/db_extern.h>
138 #endif
139
140 #include <mips/cache.h>
141 #include <mips/locore.h>
142 #include <mips/cpuregs.h>
143
144 #include <mips/atheros/include/platform.h>
145 #include <mips/atheros/include/arbusvar.h>
146
147 /* Maps for VM objects. */
148 struct vm_map *phys_map = NULL;
149
150 int maxmem; /* max memory per process */
151
152 int mem_cluster_cnt;
153 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
154
155 void mach_init(void); /* XXX */
156
157 /* Currently the Atheros kernels only support big endian boards */
158 CTASSERT(_BYTE_ORDER == _BIG_ENDIAN);
159
160 static void
cal_timer(void)161 cal_timer(void)
162 {
163 uint32_t cntfreq;
164
165 cntfreq = curcpu()->ci_cpu_freq = atheros_get_cpu_freq();
166
167 /* MIPS 4Kc CP0 counts every other clock */
168 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
169 cntfreq /= 2;
170
171 curcpu()->ci_cctr_freq = cntfreq;
172 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz;
173
174 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */
175 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000);
176 }
177
178 void
mach_init(void)179 mach_init(void)
180 {
181 void *kernend;
182 uint32_t memsize;
183
184 extern char edata[], end[]; /* XXX */
185
186 /* clear the BSS segment */
187 kernend = (void *)mips_round_page(end);
188
189 memset(edata, 0, (char *)kernend - edata);
190
191 /* setup early console */
192 atheros_set_platformsw();
193
194 /* set CPU model info for sysctl_hw */
195 cpu_setmodel("Atheros %s", atheros_get_cpuname());
196
197 /*
198 * Set up the exception vectors and CPU-specific function
199 * vectors early on. We need the wbflush() vector set up
200 * before comcnattach() is called (or at least before the
201 * first printf() after that is called).
202 * Sets up mips_cpu_flags that may be queried by other
203 * functions called during startup.
204 * Also clears the I+D caches.
205 */
206 mips_vector_init(NULL, false);
207
208 /*
209 * Calibrate timers.
210 */
211 cal_timer();
212
213 uvm_md_init();
214
215 /*
216 * Look at arguments passed to us and compute boothowto.
217 */
218 boothowto = RB_AUTOBOOT;
219 #ifdef KADB
220 boothowto |= RB_KDB;
221 #endif
222
223 /*
224 * This would be a good place to parse a boot command line, if
225 * we got one from the bootloader. Right now we have no way to
226 * get one from e.g. vxworks.
227 */
228
229 /*
230 * Determine the memory size.
231 *
232 * Note: Reserve the first page! That's where the trap
233 * vectors are located.
234 */
235 memsize = atheros_get_memsize();
236
237 printf("Memory size: 0x%08x\n", memsize);
238 physmem = btoc(memsize);
239
240 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE;
241 mem_clusters[mem_cluster_cnt].size =
242 memsize - mem_clusters[mem_cluster_cnt].start;
243 mem_cluster_cnt++;
244
245 /*
246 * Load the available pages into the VM system.
247 */
248 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
249 mem_clusters, mem_cluster_cnt, NULL, 0);
250
251 /*
252 * Initialize message buffer (at end of core).
253 */
254 mips_init_msgbuf();
255
256 /*
257 * Initialize the virtual memory system.
258 */
259 pmap_bootstrap();
260
261 /*
262 * Allocate uarea page for lwp0 and set it.
263 */
264 mips_init_lwp0_uarea();
265
266 /*
267 * Initialize busses.
268 */
269 atheros_bus_init();
270
271 /*
272 * Turn off (ignore) the hardware watchdog. If we got this
273 * far, then we shouldn't need it anymore.
274 */
275 atheros_wdog_reload(0);
276
277 /*
278 * Turn off watchpoint that may have been enabled by the
279 * PROM. VxWorks bootloader seems to leave one set.
280 */
281 __asm volatile (
282 "mtc0 $0, $%0\n\t"
283 "nop\n\t"
284 "nop\n\t" :: "n"(MIPS_COP_0_WATCH_LO));
285
286 /*
287 * Initialize debuggers, and break into them, if appropriate.
288 */
289 #ifdef DDB
290 if (boothowto & RB_KDB)
291 Debugger();
292 #endif
293 }
294
295 void
consinit(void)296 consinit(void)
297 {
298
299 /*
300 * Everything related to console initialization is done
301 * in mach_init().
302 */
303 atheros_consinit();
304 }
305
306 void
cpu_startup(void)307 cpu_startup(void)
308 {
309 cpu_startup_common();
310 }
311
312 void
cpu_reboot(int howto,char * bootstr)313 cpu_reboot(int howto, char *bootstr)
314 {
315 static int waittime = -1;
316
317 /* Take a snapshot before clobbering any registers. */
318 savectx(curpcb);
319
320 /* If "always halt" was specified as a boot flag, obey. */
321 if (boothowto & RB_HALT)
322 howto |= RB_HALT;
323
324 boothowto = howto;
325
326 /* If system is cold, just halt. */
327 if (cold) {
328 boothowto |= RB_HALT;
329 goto haltsys;
330 }
331
332 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) {
333 waittime = 0;
334
335 /*
336 * Synchronize the disks....
337 */
338 vfs_shutdown();
339 }
340
341 /* Disable interrupts. */
342 splhigh();
343
344 if (boothowto & RB_DUMP)
345 dumpsys();
346
347 haltsys:
348 /* Run any shutdown hooks. */
349 doshutdownhooks();
350
351 pmf_system_shutdown(boothowto);
352
353 #if 0
354 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN)
355 if (board && board->ab_poweroff)
356 board->ab_poweroff();
357 #endif
358
359 /*
360 * Firmware may autoboot (depending on settings), and we cannot pass
361 * flags to it (at least I haven't figured out how to yet), so
362 * we "pseudo-halt" now.
363 */
364 if (boothowto & RB_HALT) {
365 printf("\n");
366 printf("The operating system has halted.\n");
367 printf("Please press any key to reboot.\n\n");
368 cnpollc(1); /* For proper keyboard command handling */
369 cngetc();
370 cnpollc(0);
371 }
372
373 printf("resetting board...\n\n");
374 mips_icache_sync_all();
375 mips_dcache_wbinv_all();
376 atheros_reset();
377 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC));
378 printf("Oops, back from reset\n\nSpinning...");
379 for (;;)
380 /* spin forever */ ; /* XXX */
381 /*NOTREACHED*/
382 }
383