1 /* $NetBSD: machdep.c,v 1.22 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 1.22 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 <mips/locore.h>
108 #include <mips/psl.h>
109
110 #include <mips/bonito/bonitoreg.h>
111 #include <evbmips/gdium/gdiumvar.h>
112
113 #include "com.h"
114 #if NCOM > 0
115 #include <dev/ic/comreg.h>
116 #include <dev/ic/comvar.h>
117
118 int comcnrate = 38400; /* XXX should be config option */
119 #endif /* NCOM > 0 */
120
121 struct gdium_config gdium_configuration = {
122 .gc_bonito = {
123 .bc_adbase = 11, /* magic */
124 },
125 };
126
127 /* For sysctl_hw. */
128
129 /* Maps for VM objects. */
130 struct vm_map *phys_map = NULL;
131
132 int netboot; /* Are we netbooting? */
133
134 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
135 int mem_cluster_cnt;
136
137 void configure(void);
138 void mach_init(int, char **, char **, void *);
139
140 /* The GDIUM kernels only support little endian */
141 CTASSERT(_BYTE_ORDER == _LITTLE_ENDIAN);
142
143 /*
144 * For some reason, PMON doesn't assign a real address to the Ralink's BAR.
145 * So we have to do it.
146 */
147 static void
gdium_pci_attach_hook(device_t parent,device_t self,struct pcibus_attach_args * pba)148 gdium_pci_attach_hook(device_t parent, device_t self,
149 struct pcibus_attach_args *pba)
150 {
151 const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1);
152 const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0);
153 bus_size_t high_size, ralink_size;
154 pcireg_t v;
155
156 /*
157 * Get the highest PCI addr used from the last PCI dev.
158 */
159 v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START);
160 v &= PCI_MAPREG_MEM_ADDR_MASK;
161
162 /*
163 * Get the sizes of the map registers.
164 */
165 pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START,
166 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL);
167 pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START,
168 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL);
169
170 /*
171 * Position the ralink register space after the last device.
172 */
173 v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1);
174
175 /*
176 * Set the mapreg.
177 */
178 pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v);
179
180 #if 0
181 /*
182 * Why does linux do this?
183 */
184 for (int dev = 15; dev <= 17; dev +=2) {
185 for (int func = 0; func <= 1; func++) {
186 pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func);
187 v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0);
188 v |= 3;
189 pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v);
190 }
191 }
192 #endif
193 }
194
195 /*
196 * Do all the stuff that locore normally does before calling main().
197 */
198 void
mach_init(int argc,char ** argv,char ** envp32,void * callvec)199 mach_init(int argc, char **argv, char **envp32, void *callvec)
200 {
201 struct gdium_config *gc = &gdium_configuration;
202 void *kernend;
203 #ifdef NOTYET
204 char *cp;
205 int howto;
206 #endif
207 int i;
208 psize_t memsize;
209 char *envp[128];
210 int32_t *eptrs = (int32_t *)envp32;
211 extern char edata[], end[];
212
213 /*
214 * Clear the BSS segment.
215 */
216 kernend = (void *)mips_round_page(end);
217 memset(edata, 0, (char *)kernend - edata);
218
219 /*
220 * the pointer array in envp32 is 32bit - we need to sign extend them
221 * and put them into a list of actual pointers
222 * Only strictly necessary on LP64 but it doesn't hurt in LP32, runs only
223 * once at startup and I'd rather not pollute this file with another
224 * #ifdef orgy
225 */
226 i = 0;
227 while (i < 128 && eptrs[i] != 0) {
228 envp[i] = (char *)(intptr_t)eptrs[i]; /* sign extend */
229 i++;
230 }
231
232 /*
233 * Set up the exception vectors and CPU-specific function
234 * vectors early on. We need the wbflush() vector set up
235 * before comcnattach() is called (or at least before the
236 * first printf() after that is called).
237 * Also clears the I+D caches.
238 */
239 mips_vector_init(NULL, false);
240
241 uvm_md_init();
242
243 memsize = 256*1024*1024;
244 physmem = btoc(memsize);
245
246 bonito_pci_init(&gc->gc_pc, &gc->gc_bonito);
247 /*
248 * Override the null bonito_pci_attach_hook with our own to we can
249 * fix the ralink (device 13).
250 */
251 gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook;
252 gdium_bus_io_init(&gc->gc_iot, gc);
253 gdium_bus_mem_init(&gc->gc_memt, gc);
254 gdium_dma_init(gc);
255 gdium_cnattach(gc);
256
257 /*
258 * Disable the 2nd PCI window since we don't need it.
259 */
260 mips3_sd(MIPS_PHYS_TO_KSEG1(BONITO_REGBASE + 0x158), 0xe);
261 pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0);
262
263 /*
264 * Get the timer from PMON.
265 */
266 for (i = 0; envp[i] != NULL; i++) {
267 if (!strncmp(envp[i], "cpuclock=", 9)) {
268 curcpu()->ci_cpu_freq =
269 strtoul(&envp[i][9], NULL, 10);
270 break;
271 }
272 }
273
274 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
275 curcpu()->ci_cpu_freq /= 2;
276
277 /* Compute the number of ticks for hz. */
278 curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz;
279
280 /* Compute the delay divisor. */
281 curcpu()->ci_divisor_delay =
282 ((curcpu()->ci_cpu_freq + 500000) / 1000000);
283
284 /*
285 * Get correct cpu frequency if the CPU runs at twice the
286 * external/cp0-count frequency.
287 */
288 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
289 curcpu()->ci_cpu_freq *= 2;
290
291 #ifdef DEBUG
292 printf("Timer calibration: %lu cycles/sec\n",
293 curcpu()->ci_cpu_freq);
294 #endif
295
296 #if NCOM > 0
297 /*
298 * Delay to allow firmware putchars to complete.
299 * FIFO depth * character time.
300 * character time = (1000000 / (defaultrate / 10))
301 */
302 delay(160000000 / comcnrate);
303 if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate,
304 COM_FREQ, COM_TYPE_NORMAL,
305 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
306 panic("malta: unable to initialize serial console");
307 #endif /* NCOM > 0 */
308
309 mem_clusters[0].start = 0;
310 mem_clusters[0].size = ctob(physmem);
311 mem_cluster_cnt = 1;
312
313 cpu_setmodel("Gdium Liberty 1000");
314
315 /*
316 * XXX: check argv[0] - do something if "gdb"???
317 */
318
319 /*
320 * Look at arguments passed to us and compute boothowto.
321 */
322 boothowto = RB_AUTOBOOT;
323 #ifdef NOTYET
324 for (i = 1; i < argc; i++) {
325 for (cp = argv[i]; *cp; cp++) {
326 /* Ignore superfluous '-', if there is one */
327 if (*cp == '-')
328 continue;
329
330 howto = 0;
331 BOOT_FLAG(*cp, howto);
332 if (! howto)
333 printf("bootflag '%c' not recognised\n", *cp);
334 else
335 boothowto |= howto;
336 }
337 }
338 #endif
339
340 /*
341 * Load the rest of the available pages into the VM system.
342 */
343 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
344 mem_clusters, mem_cluster_cnt, NULL, 0);
345
346 /*
347 * Initialize error message buffer (at end of core).
348 */
349 mips_init_msgbuf();
350
351 pmap_bootstrap();
352
353 /*
354 * Allocate uarea page for lwp0 and set it.
355 */
356 mips_init_lwp0_uarea();
357
358 /*
359 * Initialize debuggers, and break into them, if appropriate.
360 */
361 #if defined(DDB)
362 if (boothowto & RB_KDB)
363 Debugger();
364 #endif
365 }
366
367 void
consinit(void)368 consinit(void)
369 {
370
371 /*
372 * Everything related to console initialization is done
373 * in mach_init().
374 */
375 }
376
377 /*
378 * Allocate memory for variable-sized tables,
379 */
380 void
cpu_startup(void)381 cpu_startup(void)
382 {
383 /*
384 * Do the common startup items.
385 */
386 cpu_startup_common();
387
388 /*
389 * Virtual memory is bootstrapped -- notify the bus spaces
390 * that memory allocation is now safe.
391 */
392 gdium_configuration.gc_mallocsafe = 1;
393
394 }
395
396 int waittime = -1;
397
398 void
cpu_reboot(int howto,char * bootstr)399 cpu_reboot(int howto, char *bootstr)
400 {
401
402 /* Take a snapshot before clobbering any registers. */
403 savectx(curpcb);
404
405 if (cold) {
406 howto |= RB_HALT;
407 goto haltsys;
408 }
409
410 /* If "always halt" was specified as a boot flag, obey. */
411 if (boothowto & RB_HALT)
412 howto |= RB_HALT;
413
414 boothowto = howto;
415 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
416 waittime = 0;
417 vfs_shutdown();
418 }
419
420 splhigh();
421
422 if (howto & RB_DUMP)
423 dumpsys();
424
425 haltsys:
426 doshutdownhooks();
427
428 pmf_system_shutdown(boothowto);
429
430 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
431 /*
432 * Turning on GPIO1 as output will cause a powerdown.
433 */
434 REGVAL(BONITO_GPIODATA) |= 2;
435 REGVAL(BONITO_GPIOIE) &= ~2;
436 }
437
438 if (howto & RB_HALT) {
439 printf("\n");
440 printf("The operating system has halted.\n");
441 printf("Please press any key to reboot.\n\n");
442 cnpollc(1); /* For proper keyboard command handling */
443 cngetc();
444 cnpollc(0);
445 }
446
447 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
448
449 /*
450 * Turning off GPIO2 as output will cause a reset.
451 */
452 REGVAL(BONITO_GPIODATA) &= ~4;
453 REGVAL(BONITO_GPIOIE) &= ~4;
454
455 __asm__ __volatile__ (
456 "\t.long 0x3c02bfc0\n"
457 "\t.long 0x00400008\n"
458 ::: "v0");
459 }
460