machdep.c revision 1.22 
1/* $NetBSD: machdep.c,v 1.22 2003/09/26 16:00:28 simonb 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 1.22 2003/09/26 16:00:28 simonb 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/sa.h>
82#include <sys/syscallargs.h>
83#include <sys/kcore.h>
84#include <sys/ksyms.h>
85
86#include <uvm/uvm_extern.h>
87
88#include <machine/cpu.h>
89#include <machine/reg.h>
90#include <machine/psl.h>
91#include <machine/pte.h>
92#include <machine/autoconf.h>
93#include <machine/intr.h>
94#include <machine/swarm.h>
95#include <mips/locore.h>
96
97#include <mips/cfe/cfe_api.h>
98
99#if 0 /* XXXCGD */
100#include <machine/nvram.h>
101#endif /* XXXCGD */
102#include <machine/leds.h>
103
104#include "ksyms.h"
105
106#if NKSYMS || defined(DDB) || defined(LKM)
107#include <machine/db_machdep.h>
108#include <ddb/db_access.h>
109#include <ddb/db_sym.h>
110#include <ddb/db_extern.h>
111#ifndef DB_ELFSIZE
112#error Must define DB_ELFSIZE!
113#endif
114#define	ELFSIZE		DB_ELFSIZE
115#include <sys/exec_elf.h>
116#endif
117
118#include <dev/cons.h>
119
120#if NKSYMS || defined(DDB) || defined(LKM)
121/* start and end of kernel symbol table */
122void	*ksym_start, *ksym_end;
123#endif
124
125/* For sysctl_hw. */
126extern char cpu_model[];
127
128/* Our exported CPU info.  Only one for now */
129struct cpu_info cpu_info_store;
130
131/* Maps for VM objects. */
132struct vm_map *exec_map = NULL;
133struct vm_map *mb_map = NULL;
134struct vm_map *phys_map = NULL;
135
136int	physmem;		/* Total physical memory */
137
138char	bootstring[512];	/* Boot command */
139int	netboot;		/* Are we netbooting? */
140int	cfe_present;
141
142struct bootinfo_v1 bootinfo;
143
144phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
145int mem_cluster_cnt;
146
147void	configure(void);
148void	mach_init(long, long, long, long);
149
150/*
151 * safepri is a safe priority for sleep to set for a spin-wait during
152 * autoconfiguration or after a panic.  Used as an argument to splx().
153 */
154int	safepri = MIPS_INT_MASK | MIPS_SR_INT_IE;
155
156extern caddr_t esym;
157extern struct user *proc0paddr;
158
159/*
160 * Do all the stuff that locore normally does before calling main().
161 */
162void
163mach_init(long fwhandle, long magic, long bootdata, long reserved)
164{
165	caddr_t kernend, v, p0;
166	u_long first, last;
167	vsize_t size;
168	extern char edata[], end[];
169	int i;
170	uint32_t config;
171
172	/* XXX this code must run on the target cpu */
173	config = mips3_cp0_config_read();
174	config &= ~MIPS3_CONFIG_K0_MASK;
175	config |= 0x05;				/* XXX.  cacheable coherent */
176	mips3_cp0_config_write(config);
177
178	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
179	memset(edata, 0, end - edata);
180
181	/*
182	 * Copy the bootinfo structure from the boot loader.
183	 * this has to be done before mips_vector_init is
184	 * called because we may need CFE's TLB handler
185	 */
186
187	if (magic == BOOTINFO_MAGIC)
188		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
189		    sizeof bootinfo);
190	else if (reserved == CFE_EPTSEAL) {
191		magic = BOOTINFO_MAGIC;
192		bzero(&bootinfo, sizeof bootinfo);
193		bootinfo.version = BOOTINFO_VERSION;
194		bootinfo.fwhandle = fwhandle;
195		bootinfo.fwentry = bootdata;
196		bootinfo.ssym = (vaddr_t)end;
197		bootinfo.esym = (vaddr_t)end;
198	}
199
200	kernend = (caddr_t)mips_round_page(end);
201#if NKSYMS || defined(DDB) || defined(LKM)
202	if (magic == BOOTINFO_MAGIC) {
203		ksym_start = (void *)bootinfo.ssym;
204		ksym_end   = (void *)bootinfo.esym;
205		kernend = (caddr_t)mips_round_page((vaddr_t)ksym_end);
206	}
207#endif
208
209	consinit();
210
211	uvm_setpagesize();
212
213	/*
214	 * Copy exception-dispatch code down to exception vector.
215	 * Initialize locore-function vector.
216	 * Clear out the I and D caches.
217	 */
218	mips_vector_init();
219
220#ifdef DEBUG
221	printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n",
222	    (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved);
223#endif
224
225	strcpy(cpu_model, "sb1250");
226
227	if (magic == BOOTINFO_MAGIC) {
228		int idx;
229		int added;
230		uint64_t start, len, type;
231
232		cfe_init(bootinfo.fwhandle, bootinfo.fwentry);
233		cfe_present = 1;
234
235		idx = 0;
236		physmem = 0;
237		mem_cluster_cnt = 0;
238		while (cfe_enummem(idx, 0, &start, &len, &type) == 0) {
239			added = 0;
240			printf("Memory Block #%d start %08llX len %08llX: %s: ",
241			    idx, start, len, (type == CFE_MI_AVAILABLE) ?
242			    "Available" : "Reserved");
243			if ((type == CFE_MI_AVAILABLE) &&
244			    (mem_cluster_cnt < VM_PHYSSEG_MAX)) {
245				/*
246				 * XXX Ignore memory above 256MB for now, it
247				 * XXX needs special handling.
248				 */
249				if (start < (256*1024*1024)) {
250				    physmem += btoc(((int) len));
251				    mem_clusters[mem_cluster_cnt].start =
252					(long) start;
253				    mem_clusters[mem_cluster_cnt].size =
254					(long) len;
255				    mem_cluster_cnt++;
256				    added = 1;
257				}
258			}
259			if (added)
260				printf("added to map\n");
261			else
262				printf("not added to map\n");
263			idx++;
264		}
265
266	} else {
267		/*
268		 * Handle the case of not being called from the firmware.
269		 */
270		/* XXX hardwire to 32MB; should be kernel config option */
271		physmem = 32 * 1024 * 1024 / 4096;
272		mem_clusters[0].start = 0;
273		mem_clusters[0].size = ctob(physmem);
274		mem_cluster_cnt = 1;
275	}
276
277
278	for (i = 0; i < sizeof(bootinfo.boot_flags); i++) {
279		switch (bootinfo.boot_flags[i]) {
280		case '\0':
281			break;
282		case ' ':
283			continue;
284		case '-':
285			while (bootinfo.boot_flags[i] != ' ' &&
286			    bootinfo.boot_flags[i] != '\0') {
287				switch (bootinfo.boot_flags[i]) {
288				case 'a':
289					boothowto |= RB_ASKNAME;
290					break;
291				case 'd':
292					boothowto |= RB_KDB;
293					break;
294				case 's':
295					boothowto |= RB_SINGLE;
296					break;
297				}
298				i++;
299			}
300		}
301	}
302
303	/*
304	 * Load the rest of the available pages into the VM system.
305	 * The first chunk is tricky because we have to avoid the
306	 * kernel, but the rest are easy.
307	 */
308	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
309	last = mem_clusters[0].start + mem_clusters[0].size;
310	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
311		VM_FREELIST_DEFAULT);
312
313	for (i = 1; i < mem_cluster_cnt; i++) {
314		first = round_page(mem_clusters[i].start);
315		last = mem_clusters[i].start + mem_clusters[i].size;
316		uvm_page_physload(atop(first), atop(last), atop(first),
317		    atop(last), VM_FREELIST_DEFAULT);
318	}
319
320	/*
321	 * Initialize error message buffer (at end of core).
322	 */
323	mips_init_msgbuf();
324
325	/*
326	 * Allocate space for proc0's USPACE
327	 */
328	p0 = (caddr_t)pmap_steal_memory(USPACE, NULL, NULL);
329	lwp0.l_addr = proc0paddr = (struct user *)p0;
330	lwp0.l_md.md_regs = (struct frame *)(p0 + USPACE) - 1;
331	curpcb = &lwp0.l_addr->u_pcb;
332	curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
333
334	/*
335	 * Allocate space for system data structures.  These data structures
336	 * are allocated here instead of cpu_startup() because physical
337	 * memory is directly addressable.  We don't have to map these into
338	 * virtual address space.
339	 */
340	size = (vsize_t)allocsys(NULL, NULL);
341	v = (caddr_t)pmap_steal_memory(size, NULL, NULL);
342	if ((allocsys(v, NULL) - v) != size)
343		panic("mach_init: table size inconsistency");
344
345	pmap_bootstrap();
346
347	/*
348	 * Initialize debuggers, and break into them, if appropriate.
349	 */
350#if NKSYMS || defined(DDB) || defined(LKM)
351	ksyms_init(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
352	    ksym_start, ksym_end);
353#endif
354
355	if (boothowto & RB_KDB) {
356#if defined(DDB)
357		Debugger();
358#endif
359	}
360}
361
362/*
363 * Allocate memory for variable-sized tables,
364 */
365void
366cpu_startup(void)
367{
368	u_int i, base, residual;
369	vaddr_t minaddr, maxaddr;
370	vsize_t size;
371	char pbuf[9];
372
373	/*
374	 * Good {morning,afternoon,evening,night}.
375	 */
376	printf(version);
377	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
378	printf("%s memory", pbuf);
379
380	/*
381	 * Allocate virtual address space for file I/O buffers.
382	 * Note they are different than the array of headers, 'buf',
383	 * and usually occupy more virtual memory than physical.
384	 */
385	size = MAXBSIZE * nbuf;
386	if (uvm_map(kernel_map, (vaddr_t *)(void *)&buffers, round_page(size),
387		    NULL, UVM_UNKNOWN_OFFSET, 0,
388		    UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
389		    UVM_ADV_NORMAL, 0)) != 0)
390		panic("startup: cannot allocate VM for buffers");
391	minaddr = (vaddr_t)buffers;
392	base = bufpages / nbuf;
393	residual = bufpages % nbuf;
394	for (i = 0; i < nbuf; i++) {
395		vsize_t curbufsize;
396		vaddr_t curbuf;
397		struct vm_page *pg;
398
399		/*
400		 * Each buffer has MAXBSIZE bytes of VM space allocated.  Of
401		 * that MAXBSIZE space, we allocate and map (base+1) pages
402		 * for the first "residual" buffers, and then we allocate
403		 * "base" pages for the rest.
404		 */
405		curbuf = (vaddr_t) buffers + (i * MAXBSIZE);
406		curbufsize = PAGE_SIZE * ((i < residual) ? (base + 1) : base);
407
408		while (curbufsize) {
409			pg = uvm_pagealloc(NULL, 0, NULL, 0);
410			if (pg == NULL)
411				panic("cpu_startup: not enough memory for "
412					"buffer cache");
413			pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg),
414			    VM_PROT_READ|VM_PROT_WRITE);
415			curbuf += PAGE_SIZE;
416			curbufsize -= PAGE_SIZE;
417		}
418	}
419
420	/*
421	 * Allocate a submap for exec arguments.  This map effectively
422	 * limits the number of processes exec'ing at any time.
423	 */
424	exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 16 * NCARGS,
425	    VM_MAP_PAGEABLE, FALSE, NULL);
426	/*
427	 * Allocate a submap for physio.
428	 */
429	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, VM_PHYS_SIZE,
430	    0, FALSE, NULL);
431
432
433	/*
434	 * (No need to allocate an mbuf cluster submap.  Mbuf clusters
435	 * are allocated via the pool allocator, and we use KSEG to
436	 * map those pages.)
437	 */
438
439	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
440	printf(", %s free", pbuf);
441	format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE);
442	printf(", %s in %u buffers\n", pbuf, nbuf);
443
444	/*
445	 * Set up buffers, so they can be used to read disk labels.
446	 */
447	bufinit();
448}
449
450int	waittime = -1;
451
452void
453cpu_reboot(int howto, char *bootstr)
454{
455
456	/* Take a snapshot before clobbering any registers. */
457	if (curlwp)
458		savectx((struct user *)curpcb);
459
460	if (cold) {
461		howto |= RB_HALT;
462		goto haltsys;
463	}
464
465	/* If "always halt" was specified as a boot flag, obey. */
466	if (boothowto & RB_HALT)
467		howto |= RB_HALT;
468
469	boothowto = howto;
470	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
471		waittime = 0;
472		vfs_shutdown();
473
474		/*
475		 * If we've been adjusting the clock, the todr
476		 * will be out of synch; adjust it now.
477		 */
478		resettodr();
479	}
480
481	splhigh();
482
483	if (howto & RB_DUMP)
484		dumpsys();
485
486haltsys:
487	doshutdownhooks();
488
489	if (howto & RB_HALT) {
490		printf("\n");
491		printf("The operating system has halted.\n");
492		printf("Please press any key to reboot.\n\n");
493		cnpollc(1);	/* For proper keyboard command handling */
494		cngetc();
495		cnpollc(0);
496	}
497
498	printf("rebooting...\n\n");
499
500	if (cfe_present) {
501		/*
502		 * XXX
503		 * For some reason we can't return to CFE with
504		 * and do a warm start.  Need to look into this...
505		 */
506		cfe_exit(0, (howto & RB_DUMP) ? 1 : 0);
507		printf("cfe_exit didn't!\n");
508	}
509
510	printf("WARNING: reboot failed!\n");
511
512	for (;;);
513}
514
515static void
516cswarm_setled(u_int index, char c)
517{
518	volatile u_char *led_ptr =
519	    (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS);
520
521	if (index < 4)
522		led_ptr[0x20 + ((3 - index) << 3)] = c;
523}
524
525void
526cswarm_setleds(const char *str)
527{
528	int i;
529
530	for (i = 0; i < 4 && str[i]; i++)
531		cswarm_setled(i, str[i]);
532	for (; i < 4; i++)
533		cswarm_setled(' ', str[i]);
534}
535
536int
537sbmips_cca_for_pa(paddr_t pa)
538{
539	int rv;
540
541	/* Check each DRAM region. */
542	if ((pa >= 0x0000000000 && pa <= 0x000fffffff) ||	/* DRAM 0 */
543	    (pa >= 0x0080000000 && pa <= 0x008fffffff) ||	/* DRAM 1 */
544	    (pa >= 0x0090000000 && pa <= 0x009fffffff) ||	/* DRAM 2 */
545	    (pa >= 0x00c0000000 && pa <= 0x00cfffffff) ||	/* DRAM 3 */
546#ifdef _MIPS_PADDR_T_64BIT
547	    (pa >= 0x0100000000 && pa <= 0x07ffffffff) ||	/* DRAM exp */
548#endif
549	   0) {
550		rv = 5;		/* Cacheable coherent. */
551		goto done;
552	}
553
554	rv = 2;			/* Uncached. */
555done:
556	return (rv);
557}
558