machdep.c revision 1.49 
1/* $NetBSD: machdep.c,v 1.49 2011/02/20 07:47:38 matt 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 1.49 2011/02/20 07:47:38 matt 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/systm.h>
69#include <sys/kernel.h>
70#include <sys/proc.h>
71#include <sys/buf.h>
72#include <sys/reboot.h>
73#include <sys/conf.h>
74#include <sys/file.h>
75#include <sys/malloc.h>
76#include <sys/mbuf.h>
77#include <sys/msgbuf.h>
78#include <sys/device.h>
79#include <sys/exec.h>
80#include <sys/mount.h>
81#include <sys/syscallargs.h>
82#include <sys/kcore.h>
83#include <sys/ksyms.h>
84
85#include <uvm/uvm_extern.h>
86
87#include <machine/cpu.h>
88#include <machine/reg.h>
89#include <machine/psl.h>
90#include <machine/pte.h>
91#include <machine/autoconf.h>
92#include <machine/intr.h>
93#include <machine/swarm.h>
94#include <mips/locore.h>
95
96#include <mips/cfe/cfe_api.h>
97
98#if 0 /* XXXCGD */
99#include <machine/nvram.h>
100#endif /* XXXCGD */
101#include <machine/leds.h>
102
103#include <mips/sibyte/dev/sbbuswatchvar.h>
104
105#include "ksyms.h"
106
107#if NKSYMS || defined(DDB) || defined(MODULAR)
108#include <machine/db_machdep.h>
109#include <ddb/db_access.h>
110#include <ddb/db_sym.h>
111#include <ddb/db_extern.h>
112#ifndef DB_ELFSIZE
113#error Must define DB_ELFSIZE!
114#endif
115#define	ELFSIZE		DB_ELFSIZE
116#include <sys/exec_elf.h>
117#endif
118
119#include <dev/cons.h>
120
121#if NKSYMS || defined(DDB) || defined(MODULAR)
122/* start and end of kernel symbol table */
123void	*ksym_start, *ksym_end;
124#endif
125
126/* Our exported CPU info.  Only one for now */
127struct cpu_info cpu_info_store;
128
129/* Maps for VM objects. */
130struct vm_map *phys_map = NULL;
131
132int	physmem;		/* Total physical memory */
133
134char	bootstring[512];	/* Boot command */
135int	netboot;		/* Are we netbooting? */
136int	cfe_present;
137
138struct bootinfo_v1 bootinfo;
139
140phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
141int mem_cluster_cnt;
142
143void	configure(void);
144void	mach_init(long, long, long, long);
145
146extern void *esym;
147
148/*
149 * Do all the stuff that locore normally does before calling main().
150 */
151void
152mach_init(long fwhandle, long magic, long bootdata, long reserved)
153{
154	void *kernend;
155	extern char edata[], end[];
156	uint32_t config;
157
158	/* XXX this code must run on the target CPU */
159	config = mips3_cp0_config_read();
160	config &= ~MIPS3_CONFIG_K0_MASK;
161	config |= 0x05;				/* XXX.  cacheable coherent */
162	mips3_cp0_config_write(config);
163
164	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
165	memset(edata, 0, end - edata);
166
167	/*
168	 * Copy the bootinfo structure from the boot loader.
169	 * this has to be done before mips_vector_init is
170	 * called because we may need CFE's TLB handler
171	 */
172
173	if (magic == BOOTINFO_MAGIC)
174		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
175		    sizeof bootinfo);
176	else if (reserved == CFE_EPTSEAL) {
177		magic = BOOTINFO_MAGIC;
178		memset(&bootinfo, 0, sizeof bootinfo);
179		bootinfo.version = BOOTINFO_VERSION;
180		bootinfo.fwhandle = fwhandle;
181		bootinfo.fwentry = bootdata;
182		bootinfo.ssym = (vaddr_t)end;
183		bootinfo.esym = (vaddr_t)end;
184	}
185
186	kernend = (void *)mips_round_page(end);
187#if NKSYMS || defined(DDB) || defined(MODULAR)
188	if (magic == BOOTINFO_MAGIC) {
189		ksym_start = (void *)(intptr_t)bootinfo.ssym;
190		ksym_end   = (void *)(intptr_t)bootinfo.esym;
191		kernend = (void *)mips_round_page((vaddr_t)ksym_end);
192	}
193#endif
194
195	consinit();
196
197	uvm_setpagesize();
198
199	/*
200	 * Copy exception-dispatch code down to exception vector.
201	 * Initialize locore-function vector.
202	 * Clear out the I and D caches.
203	 */
204#ifdef MULTIPROCESSOR
205	mips_vector_init(NULL, true);
206#else
207	mips_vector_init(NULL, false);
208#endif
209
210	mips_locoresw.lsw_bus_error = sibyte_bus_watch_check;
211
212	sb1250_ipl_map_init();
213
214#ifdef DEBUG
215	printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n",
216	    (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved);
217#endif
218
219	strcpy(cpu_model, "sb1250");
220
221	if (magic == BOOTINFO_MAGIC) {
222		int idx;
223		int added;
224		uint64_t start, len, type;
225
226		cfe_init(bootinfo.fwhandle, bootinfo.fwentry);
227		cfe_present = 1;
228
229		idx = 0;
230		physmem = 0;
231		mem_cluster_cnt = 0;
232		while (cfe_enummem(idx, 0, &start, &len, &type) == 0) {
233			added = 0;
234			printf("Memory Block #%d start %08"PRIx64"X len %08"PRIx64"X: %s: ",
235			    idx, start, len, (type == CFE_MI_AVAILABLE) ?
236			    "Available" : "Reserved");
237			if ((type == CFE_MI_AVAILABLE) &&
238			    (mem_cluster_cnt < VM_PHYSSEG_MAX)) {
239				/*
240				 * XXX Ignore memory above 256MB for now, it
241				 * XXX needs special handling.
242				 */
243				if (start < (256*1024*1024)) {
244				    physmem += btoc(((int) len));
245				    mem_clusters[mem_cluster_cnt].start =
246					(long) start;
247				    mem_clusters[mem_cluster_cnt].size =
248					(long) len;
249				    mem_cluster_cnt++;
250				    added = 1;
251				}
252			}
253			if (added)
254				printf("added to map\n");
255			else
256				printf("not added to map\n");
257			idx++;
258		}
259
260	} else {
261		/*
262		 * Handle the case of not being called from the firmware.
263		 */
264		/* XXX hardwire to 32MB; should be kernel config option */
265		physmem = 32 * 1024 * 1024 / 4096;
266		mem_clusters[0].start = 0;
267		mem_clusters[0].size = ctob(physmem);
268		mem_cluster_cnt = 1;
269	}
270
271
272	for (u_int i = 0; i < sizeof(bootinfo.boot_flags); i++) {
273		switch (bootinfo.boot_flags[i]) {
274		case '\0':
275			break;
276		case ' ':
277			continue;
278		case '-':
279			while (bootinfo.boot_flags[i] != ' ' &&
280			    bootinfo.boot_flags[i] != '\0') {
281				switch (bootinfo.boot_flags[i]) {
282				case 'a':
283					boothowto |= RB_ASKNAME;
284					break;
285				case 'd':
286					boothowto |= RB_KDB;
287					break;
288				case 's':
289					boothowto |= RB_SINGLE;
290					break;
291				}
292				i++;
293			}
294		}
295	}
296
297	/*
298	 * Load the rest of the available pages into the VM system.
299	 */
300	mips_page_physload(MIPS_KSEG0_START, (vaddr_t) kernend,
301	    mem_clusters, mem_cluster_cnt, NULL, 0);
302
303	/*
304	 * Initialize error message buffer (at end of core).
305	 */
306	mips_init_msgbuf();
307
308	pmap_bootstrap();
309
310	/*
311	 * Allocate uarea for lwp0 and set it.
312	 */
313	mips_init_lwp0_uarea();
314
315	/*
316	 * Initialize debuggers, and break into them, if appropriate.
317	 */
318#if NKSYMS || defined(DDB) || defined(MODULAR)
319	ksyms_addsyms_elf(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
320	    ksym_start, ksym_end);
321#endif
322
323	if (boothowto & RB_KDB) {
324#if defined(DDB)
325		Debugger();
326#endif
327	}
328
329#ifdef MULTIPROCESSOR
330	mips_fixup_exceptions(mips_fixup_zero_relative);
331#endif
332}
333
334/*
335 * Allocate memory for variable-sized tables,
336 */
337void
338cpu_startup(void)
339{
340	/*
341	 * Just do the common stuff.
342	 */
343	cpu_startup_common();
344}
345
346int	waittime = -1;
347
348void
349cpu_reboot(int howto, char *bootstr)
350{
351
352	/* Take a snapshot before clobbering any registers. */
353	savectx(curpcb);
354
355	if (cold) {
356		howto |= RB_HALT;
357		goto haltsys;
358	}
359
360	/* If "always halt" was specified as a boot flag, obey. */
361	if (boothowto & RB_HALT)
362		howto |= RB_HALT;
363
364	boothowto = howto;
365	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
366		waittime = 0;
367		vfs_shutdown();
368
369		/*
370		 * If we've been adjusting the clock, the todr
371		 * will be out of synch; adjust it now.
372		 */
373		resettodr();
374	}
375
376	splhigh();
377
378	if (howto & RB_DUMP)
379		dumpsys();
380
381haltsys:
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
412static void
413cswarm_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
422void
423cswarm_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
433int
434sbmips_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