machdep.c revision 1.39 
1/* $NetBSD: machdep.c,v 1.39 2008/11/11 06:46:43 dyoung 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 1.39 2008/11/11 06:46:43 dyoung Exp $");
62
63#include "opt_ddb.h"
64#include "opt_execfmt.h"
65
66#include <sys/param.h>
67#include <sys/systm.h>
68#include <sys/kernel.h>
69#include <sys/proc.h>
70#include <sys/buf.h>
71#include <sys/reboot.h>
72#include <sys/conf.h>
73#include <sys/file.h>
74#include <sys/malloc.h>
75#include <sys/mbuf.h>
76#include <sys/msgbuf.h>
77#include <sys/device.h>
78#include <sys/user.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 "ksyms.h"
104
105#if NKSYMS || defined(DDB) || defined(LKM)
106#include <machine/db_machdep.h>
107#include <ddb/db_access.h>
108#include <ddb/db_sym.h>
109#include <ddb/db_extern.h>
110#ifndef DB_ELFSIZE
111#error Must define DB_ELFSIZE!
112#endif
113#define	ELFSIZE		DB_ELFSIZE
114#include <sys/exec_elf.h>
115#endif
116
117#include <dev/cons.h>
118
119#if NKSYMS || defined(DDB) || defined(LKM)
120/* start and end of kernel symbol table */
121void	*ksym_start, *ksym_end;
122#endif
123
124/* Our exported CPU info.  Only one for now */
125struct cpu_info cpu_info_store;
126
127/* Maps for VM objects. */
128struct vm_map *mb_map = NULL;
129struct vm_map *phys_map = NULL;
130
131int	physmem;		/* Total physical memory */
132
133char	bootstring[512];	/* Boot command */
134int	netboot;		/* Are we netbooting? */
135int	cfe_present;
136
137struct bootinfo_v1 bootinfo;
138
139phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
140int mem_cluster_cnt;
141
142void	configure(void);
143void	mach_init(long, long, long, long);
144
145/*
146 * safepri is a safe priority for sleep to set for a spin-wait during
147 * autoconfiguration or after a panic.  Used as an argument to splx().
148 */
149int	safepri = MIPS_INT_MASK | MIPS_SR_INT_IE;
150
151extern void *esym;
152extern struct user *proc0paddr;
153
154/*
155 * Do all the stuff that locore normally does before calling main().
156 */
157void
158mach_init(long fwhandle, long magic, long bootdata, long reserved)
159{
160	void *kernend, *p0;
161	u_long first, last;
162	extern char edata[], end[];
163	int i;
164	uint32_t config;
165
166	/* XXX this code must run on the target CPU */
167	config = mips3_cp0_config_read();
168	config &= ~MIPS3_CONFIG_K0_MASK;
169	config |= 0x05;				/* XXX.  cacheable coherent */
170	mips3_cp0_config_write(config);
171
172	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
173	memset(edata, 0, end - edata);
174
175	/*
176	 * Copy the bootinfo structure from the boot loader.
177	 * this has to be done before mips_vector_init is
178	 * called because we may need CFE's TLB handler
179	 */
180
181	if (magic == BOOTINFO_MAGIC)
182		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
183		    sizeof bootinfo);
184	else if (reserved == CFE_EPTSEAL) {
185		magic = BOOTINFO_MAGIC;
186		bzero(&bootinfo, sizeof bootinfo);
187		bootinfo.version = BOOTINFO_VERSION;
188		bootinfo.fwhandle = fwhandle;
189		bootinfo.fwentry = bootdata;
190		bootinfo.ssym = (vaddr_t)end;
191		bootinfo.esym = (vaddr_t)end;
192	}
193
194	kernend = (void *)mips_round_page(end);
195#if NKSYMS || defined(DDB) || defined(LKM)
196	if (magic == BOOTINFO_MAGIC) {
197		ksym_start = (void *)bootinfo.ssym;
198		ksym_end   = (void *)bootinfo.esym;
199		kernend = (void *)mips_round_page((vaddr_t)ksym_end);
200	}
201#endif
202
203	consinit();
204
205	uvm_setpagesize();
206
207	/*
208	 * Copy exception-dispatch code down to exception vector.
209	 * Initialize locore-function vector.
210	 * Clear out the I and D caches.
211	 */
212	mips_vector_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 (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	 * The first chunk is tricky because we have to avoid the
300	 * kernel, but the rest are easy.
301	 */
302	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
303	last = mem_clusters[0].start + mem_clusters[0].size;
304	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
305		VM_FREELIST_DEFAULT);
306
307	for (i = 1; i < mem_cluster_cnt; i++) {
308		first = round_page(mem_clusters[i].start);
309		last = mem_clusters[i].start + mem_clusters[i].size;
310		uvm_page_physload(atop(first), atop(last), atop(first),
311		    atop(last), VM_FREELIST_DEFAULT);
312	}
313
314	/*
315	 * Initialize error message buffer (at end of core).
316	 */
317	mips_init_msgbuf();
318
319	/*
320	 * Allocate space for proc0's USPACE
321	 */
322	p0 = (void *)pmap_steal_memory(USPACE, NULL, NULL);
323	lwp0.l_addr = proc0paddr = (struct user *)p0;
324	lwp0.l_md.md_regs = (struct frame *)((char *)p0 + USPACE) - 1;
325	proc0paddr->u_pcb.pcb_context[11] =
326	    MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
327
328	pmap_bootstrap();
329
330	/*
331	 * Initialize debuggers, and break into them, if appropriate.
332	 */
333#if NKSYMS || defined(DDB) || defined(LKM)
334	ksyms_init(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
335	    ksym_start, ksym_end);
336#endif
337
338	if (boothowto & RB_KDB) {
339#if defined(DDB)
340		Debugger();
341#endif
342	}
343}
344
345/*
346 * Allocate memory for variable-sized tables,
347 */
348void
349cpu_startup(void)
350{
351	vaddr_t minaddr, maxaddr;
352	char pbuf[9];
353
354	/*
355	 * Good {morning,afternoon,evening,night}.
356	 */
357	printf("%s%s", copyright, version);
358	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
359	printf("total memory = %s\n", pbuf);
360
361	minaddr = 0;
362	/*
363	 * Allocate a submap for physio.
364	 */
365	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, VM_PHYS_SIZE,
366	    0, false, NULL);
367
368
369	/*
370	 * (No need to allocate an mbuf cluster submap.  Mbuf clusters
371	 * are allocated via the pool allocator, and we use KSEG to
372	 * map those pages.)
373	 */
374
375	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
376	printf("avail memory = %s\n", pbuf);
377}
378
379int	waittime = -1;
380
381void
382cpu_reboot(int howto, char *bootstr)
383{
384
385	/* Take a snapshot before clobbering any registers. */
386	if (curlwp)
387		savectx((struct user *)curpcb);
388
389	if (cold) {
390		howto |= RB_HALT;
391		goto haltsys;
392	}
393
394	/* If "always halt" was specified as a boot flag, obey. */
395	if (boothowto & RB_HALT)
396		howto |= RB_HALT;
397
398	boothowto = howto;
399	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
400		waittime = 0;
401		vfs_shutdown();
402
403		/*
404		 * If we've been adjusting the clock, the todr
405		 * will be out of synch; adjust it now.
406		 */
407		resettodr();
408	}
409
410	splhigh();
411
412	if (howto & RB_DUMP)
413		dumpsys();
414
415haltsys:
416	doshutdownhooks();
417
418	pmf_system_shutdown(boothowto);
419
420	if (howto & RB_HALT) {
421		printf("\n");
422		printf("The operating system has halted.\n");
423		printf("Please press any key to reboot.\n\n");
424		cnpollc(1);	/* For proper keyboard command handling */
425		cngetc();
426		cnpollc(0);
427	}
428
429	printf("rebooting...\n\n");
430
431	if (cfe_present) {
432		/*
433		 * XXX
434		 * For some reason we can't return to CFE with
435		 * and do a warm start.  Need to look into this...
436		 */
437		cfe_exit(0, (howto & RB_DUMP) ? 1 : 0);
438		printf("cfe_exit didn't!\n");
439	}
440
441	printf("WARNING: reboot failed!\n");
442
443	for (;;);
444}
445
446static void
447cswarm_setled(u_int index, char c)
448{
449	volatile u_char *led_ptr =
450	    (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS);
451
452	if (index < 4)
453		led_ptr[0x20 + ((3 - index) << 3)] = c;
454}
455
456void
457cswarm_setleds(const char *str)
458{
459	int i;
460
461	for (i = 0; i < 4 && str[i]; i++)
462		cswarm_setled(i, str[i]);
463	for (; i < 4; i++)
464		cswarm_setled(' ', str[i]);
465}
466
467int
468sbmips_cca_for_pa(paddr_t pa)
469{
470	int rv;
471
472	/* Check each DRAM region. */
473	if ((pa >= 0x0000000000   && pa <= 0x000fffffff) ||	/* DRAM 0 */
474	    (pa >= 0x0080000000   && pa <= 0x008fffffff) ||	/* DRAM 1 */
475	    (pa >= 0x0090000000   && pa <= 0x009fffffff) ||	/* DRAM 2 */
476	    (pa >= 0x00c0000000   && pa <= 0x00cfffffff) ||	/* DRAM 3 */
477#ifdef _MIPS_PADDR_T_64BIT
478	    (pa >= 0x0100000000LL && pa <= 0x07ffffffffLL) ||	/* DRAM exp */
479#endif
480	   0) {
481		rv = 5;		/* Cacheable coherent. */
482		goto done;
483	}
484
485	rv = 2;			/* Uncached. */
486done:
487	return (rv);
488}
489