machdep.c revision 1.11 1 /* $NetBSD: machdep.c,v 1.11 2010/02/08 19:02:27 joerg 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) 1992, 1993
40 * The Regents of the University of California. All rights reserved.
41 *
42 * This code is derived from software contributed to Berkeley by
43 * the Systems Programming Group of the University of Utah Computer
44 * Science Department, The Mach Operating System project at
45 * Carnegie-Mellon University and Ralph Campbell.
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 * 1. Redistributions of source code must retain the above copyright
51 * notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * @(#)machdep.c 8.3 (Berkeley) 1/12/94
72 * from: Utah Hdr: machdep.c 1.63 91/04/24
73 */
74 /*
75 * Copyright (c) 1988 University of Utah.
76 *
77 * This code is derived from software contributed to Berkeley by
78 * the Systems Programming Group of the University of Utah Computer
79 * Science Department, The Mach Operating System project at
80 * Carnegie-Mellon University and Ralph Campbell.
81 *
82 * Redistribution and use in source and binary forms, with or without
83 * modification, are permitted provided that the following conditions
84 * are met:
85 * 1. Redistributions of source code must retain the above copyright
86 * notice, this list of conditions and the following disclaimer.
87 * 2. Redistributions in binary form must reproduce the above copyright
88 * notice, this list of conditions and the following disclaimer in the
89 * documentation and/or other materials provided with the distribution.
90 * 3. All advertising materials mentioning features or use of this software
91 * must display the following acknowledgement:
92 * This product includes software developed by the University of
93 * California, Berkeley and its contributors.
94 * 4. Neither the name of the University nor the names of its contributors
95 * may be used to endorse or promote products derived from this software
96 * without specific prior written permission.
97 *
98 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
99 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
101 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
104 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
108 * SUCH DAMAGE.
109 *
110 * @(#)machdep.c 8.3 (Berkeley) 1/12/94
111 * from: Utah Hdr: machdep.c 1.63 91/04/24
112 */
113
114 #include <sys/cdefs.h>
115 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.11 2010/02/08 19:02:27 joerg Exp $");
116
117 #include "opt_ddb.h"
118 #include "opt_execfmt.h"
119 #include "opt_modular.h"
120
121 #include <sys/param.h>
122 #include <sys/systm.h>
123 #include <sys/kernel.h>
124 #include <sys/buf.h>
125 #include <sys/reboot.h>
126 #include <sys/mount.h>
127 #include <sys/kcore.h>
128 #include <sys/boot_flag.h>
129 #include <sys/termios.h>
130 #include <sys/ksyms.h>
131 #include <sys/device.h>
132
133 #include <uvm/uvm_extern.h>
134
135 #include <dev/cons.h>
136
137 #include "ksyms.h"
138
139 #if NKSYMS || defined(DDB) || defined(MODULAR)
140 #include <machine/db_machdep.h>
141 #include <ddb/db_extern.h>
142 #endif
143
144 #include <machine/cpu.h>
145 #include <machine/psl.h>
146
147 #include <mips/bonito/bonitoreg.h>
148 #include <evbmips/gdium/gdiumvar.h>
149
150 #include "com.h"
151 #if NCOM > 0
152 #include <dev/ic/comreg.h>
153 #include <dev/ic/comvar.h>
154
155 int comcnrate = 38400; /* XXX should be config option */
156 #endif /* NCOM > 0 */
157
158 struct gdium_config gdium_configuration = {
159 .gc_bonito = {
160 .bc_adbase = 11, /* magic */
161 },
162 };
163
164 /* For sysctl_hw. */
165 extern char cpu_model[];
166
167 /* Our exported CPU info; we can have only one. */
168 struct cpu_info cpu_info_store;
169
170 /* Maps for VM objects. */
171 struct vm_map *phys_map = NULL;
172
173 int netboot; /* Are we netbooting? */
174
175 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
176 int mem_cluster_cnt;
177
178 void configure(void);
179 void mach_init(int, char **, char **, void *);
180
181 /*
182 * safepri is a safe priority for sleep to set for a spin-wait during
183 * autoconfiguration or after a panic. Used as an argument to splx().
184 */
185 int safepri = MIPS1_PSL_LOWIPL;
186
187 /*
188 * For some reason, PMON doesn't assign a real address to the Ralink's BAR.
189 * So we have to do it.
190 */
191 static void
192 gdium_pci_attach_hook(device_t parent, device_t self,
193 struct pcibus_attach_args *pba)
194 {
195 const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1);
196 const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0);
197 bus_size_t high_size, ralink_size;
198 pcireg_t v;
199
200 /*
201 * Get the highest PCI addr used from the last PCI dev.
202 */
203 v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START);
204 v &= PCI_MAPREG_MEM_ADDR_MASK;
205
206 /*
207 * Get the sizes of the map registers.
208 */
209 pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START,
210 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL);
211 pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START,
212 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL);
213
214 /*
215 * Position the ralink register space after the last device.
216 */
217 v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1);
218
219 /*
220 * Set the mapreg.
221 */
222 pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v);
223
224 #if 0
225 /*
226 * Why does linux do this?
227 */
228 for (int dev = 15; dev <= 17; dev +=2) {
229 for (int func = 0; func <= 1; func++) {
230 pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func);
231 v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0);
232 v |= 3;
233 pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v);
234 }
235 }
236 #endif
237 }
238
239 /*
240 * Do all the stuff that locore normally does before calling main().
241 */
242 void
243 mach_init(int argc, char **argv, char **envp, void *callvec)
244 {
245 struct gdium_config *gc = &gdium_configuration;
246 void *kernend;
247 u_long first, last;
248 struct pcb *pcb0;
249 vaddr_t v;
250 #ifdef NOTYET
251 char *cp;
252 int howto;
253 #endif
254 int i;
255 psize_t memsize;
256
257 extern char edata[], end[];
258
259 /*
260 * Clear the BSS segment.
261 */
262 kernend = (void *)mips_round_page(end);
263 memset(edata, 0, (char *)kernend - edata);
264
265 /*
266 * Set up the exception vectors and CPU-specific function
267 * vectors early on. We need the wbflush() vector set up
268 * before comcnattach() is called (or at least before the
269 * first printf() after that is called).
270 * Also clears the I+D caches.
271 */
272 mips_vector_init();
273
274 /* set the VM page size */
275 uvm_setpagesize();
276
277 memsize = 256*1024*1024;
278 physmem = btoc(memsize);
279
280 bonito_pci_init(&gc->gc_pc, &gc->gc_bonito);
281 /*
282 * Override the null bonito_pci_attach_hook with our own to we can
283 * fix the ralink (device 13).
284 */
285 gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook;
286 gdium_bus_io_init(&gc->gc_iot, gc);
287 gdium_bus_mem_init(&gc->gc_memt, gc);
288 gdium_dma_init(gc);
289 gdium_cnattach(gc);
290
291 /*
292 * Disable the 2nd PCI window since we don't need it.
293 */
294 mips3_sd((uint64_t *)MIPS_PHYS_TO_KSEG1(BONITO_REGBASE + 0x158), 0xe);
295 pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0);
296
297 /*
298 * Get the timer from PMON.
299 */
300 for (i = 0; envp[i] != NULL; i++) {
301 if (!strncmp(envp[i], "cpuclock=", 9)) {
302 curcpu()->ci_cpu_freq =
303 strtoul(&envp[i][9], NULL, 10);
304 break;
305 }
306 }
307
308 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
309 curcpu()->ci_cpu_freq /= 2;
310
311 /* Compute the number of ticks for hz. */
312 curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz;
313
314 /* Compute the delay divisor. */
315 curcpu()->ci_divisor_delay =
316 ((curcpu()->ci_cpu_freq + 500000) / 1000000);
317
318 /*
319 * Get correct cpu frequency if the CPU runs at twice the
320 * external/cp0-count frequency.
321 */
322 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
323 curcpu()->ci_cpu_freq *= 2;
324
325 #ifdef DEBUG
326 printf("Timer calibration: %lu cycles/sec\n",
327 curcpu()->ci_cpu_freq);
328 #endif
329
330 #if NCOM > 0
331 /*
332 * Delay to allow firmware putchars to complete.
333 * FIFO depth * character time.
334 * character time = (1000000 / (defaultrate / 10))
335 */
336 delay(160000000 / comcnrate);
337 if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate,
338 COM_FREQ, COM_TYPE_NORMAL,
339 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
340 panic("malta: unable to initialize serial console");
341 #endif /* NCOM > 0 */
342
343 mem_clusters[0].start = 0;
344 mem_clusters[0].size = ctob(physmem);
345 mem_cluster_cnt = 1;
346
347 strcpy(cpu_model, "Gdium Liberty 1000");
348
349 /*
350 * XXX: check argv[0] - do something if "gdb"???
351 */
352
353 /*
354 * Look at arguments passed to us and compute boothowto.
355 */
356 boothowto = RB_AUTOBOOT;
357 #ifdef NOTYET
358 for (i = 1; i < argc; i++) {
359 for (cp = argv[i]; *cp; cp++) {
360 /* Ignore superfluous '-', if there is one */
361 if (*cp == '-')
362 continue;
363
364 howto = 0;
365 BOOT_FLAG(*cp, howto);
366 if (! howto)
367 printf("bootflag '%c' not recognised\n", *cp);
368 else
369 boothowto |= howto;
370 }
371 }
372 #endif
373
374 /*
375 * Load the rest of the available pages into the VM system.
376 */
377 first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
378 last = mem_clusters[0].start + mem_clusters[0].size;
379 uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
380 VM_FREELIST_DEFAULT);
381
382 /*
383 * Initialize error message buffer (at end of core).
384 */
385 mips_init_msgbuf();
386
387 pmap_bootstrap();
388
389 /*
390 * Allocate uarea page for lwp0 and set it.
391 */
392 v = uvm_pageboot_alloc(USPACE);
393 uvm_lwp_setuarea(&lwp0, v);
394
395 pcb0 = lwp_getpcb(&lwp0);
396 pcb0->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
397
398 lwp0.l_md.md_regs = (struct frame *)(v + USPACE) - 1;
399
400 /*
401 * Initialize debuggers, and break into them, if appropriate.
402 */
403 #if defined(DDB)
404 if (boothowto & RB_KDB)
405 Debugger();
406 #endif
407 }
408
409 void
410 consinit(void)
411 {
412
413 /*
414 * Everything related to console initialization is done
415 * in mach_init().
416 */
417 }
418
419 /*
420 * Allocate memory for variable-sized tables,
421 */
422 void
423 cpu_startup(void)
424 {
425 vaddr_t minaddr, maxaddr;
426 char pbuf[9];
427
428 /*
429 * Good {morning,afternoon,evening,night}.
430 */
431 printf("%s%s", copyright, version);
432 format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
433 printf("total memory = %s\n", pbuf);
434
435 /*
436 * Virtual memory is bootstrapped -- notify the bus spaces
437 * that memory allocation is now safe.
438 */
439 gdium_configuration.gc_mallocsafe = 1;
440
441 minaddr = 0;
442 /*
443 * Allocate a submap for physio.
444 */
445 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
446 VM_PHYS_SIZE, 0, FALSE, NULL);
447
448 /*
449 * (No need to allocate an mbuf cluster submap. Mbuf clusters
450 * are allocated via the pool allocator, and we use KSEG to
451 * map those pages.)
452 */
453
454 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
455 printf("avail memory = %s\n", pbuf);
456 }
457
458 int waittime = -1;
459
460 void
461 cpu_reboot(int howto, char *bootstr)
462 {
463
464 /* Take a snapshot before clobbering any registers. */
465 if (curproc)
466 savectx(curpcb);
467
468 if (cold) {
469 howto |= RB_HALT;
470 goto haltsys;
471 }
472
473 /* If "always halt" was specified as a boot flag, obey. */
474 if (boothowto & RB_HALT)
475 howto |= RB_HALT;
476
477 boothowto = howto;
478 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
479 waittime = 0;
480 vfs_shutdown();
481
482 /*
483 * If we've been adjusting the clock, the todr
484 * will be out of synch; adjust it now.
485 */
486 resettodr();
487 }
488
489 splhigh();
490
491 if (howto & RB_DUMP)
492 dumpsys();
493
494 haltsys:
495 doshutdownhooks();
496
497 pmf_system_shutdown(boothowto);
498
499 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
500 /*
501 * Turning on GPIO1 as output will cause a powerdown.
502 */
503 REGVAL(BONITO_GPIODATA) |= 2;
504 REGVAL(BONITO_GPIOIE) &= ~2;
505 }
506
507 if (howto & RB_HALT) {
508 printf("\n");
509 printf("The operating system has halted.\n");
510 printf("Please press any key to reboot.\n\n");
511 cnpollc(1); /* For proper keyboard command handling */
512 cngetc();
513 cnpollc(0);
514 }
515
516 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
517
518 /*
519 * Turning off GPIO2 as output will cause a reset.
520 */
521 REGVAL(BONITO_GPIODATA) &= ~4;
522 REGVAL(BONITO_GPIOIE) &= ~4;
523
524 __asm__ __volatile__ (
525 "\t.long 0x3c02bfc0\n"
526 "\t.long 0x00400008\n"
527 ::: "v0");
528 }
529