machdep.c revision 1.15 
1/* $NetBSD: machdep.c,v 1.15 2002/11/12 00:49:08 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. Neither the "Broadcom Corporation" name nor any
19 *    trademark or logo of Broadcom Corporation may be used to endorse or
20 *    promote products derived from this software without the prior written
21 *    permission of Broadcom Corporation.
22 *
23 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
24 *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
25 *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
26 *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
27 *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
28 *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31 *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33 *    OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36/*
37 * Copyright (c) 2000 Soren S. Jorvang.  All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 *    notice, this list of conditions, and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 *    notice, this list of conditions and the following disclaimer in the
46 *    documentation and/or other materials provided with the distribution.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 */
60
61#include "opt_ddb.h"
62#include "opt_execfmt.h"
63
64#include <sys/param.h>
65#include <sys/systm.h>
66#include <sys/kernel.h>
67#include <sys/proc.h>
68#include <sys/buf.h>
69#include <sys/reboot.h>
70#include <sys/conf.h>
71#include <sys/file.h>
72#include <sys/malloc.h>
73#include <sys/mbuf.h>
74#include <sys/msgbuf.h>
75#include <sys/device.h>
76#include <sys/user.h>
77#include <sys/exec.h>
78#include <sys/mount.h>
79#include <sys/syscallargs.h>
80#include <sys/kcore.h>
81
82#include <uvm/uvm_extern.h>
83
84#include <machine/cpu.h>
85#include <machine/reg.h>
86#include <machine/psl.h>
87#include <machine/pte.h>
88#include <machine/autoconf.h>
89#include <machine/intr.h>
90#include <machine/swarm.h>
91#include <mips/locore.h>
92
93#include <mips/cfe/cfe_api.h>
94
95#if 0 /* XXXCGD */
96#include <machine/nvram.h>
97#endif /* XXXCGD */
98#include <machine/leds.h>
99
100#ifdef DDB
101#include <machine/db_machdep.h>
102#include <ddb/db_access.h>
103#include <ddb/db_sym.h>
104#include <ddb/db_extern.h>
105#ifndef DB_ELFSIZE
106#error Must define DB_ELFSIZE!
107#endif
108#define	ELFSIZE		DB_ELFSIZE
109#include <sys/exec_elf.h>
110#endif
111
112#include <dev/cons.h>
113
114#ifdef DDB
115/* start and end of kernel symbol table */
116void	*ksym_start, *ksym_end;
117#endif
118
119/* For sysctl_hw. */
120extern char cpu_model[];
121
122/* Our exported CPU info.  Only one for now */
123struct cpu_info cpu_info_store;
124
125/* Maps for VM objects. */
126struct vm_map *exec_map = NULL;
127struct vm_map *mb_map = NULL;
128struct vm_map *phys_map = NULL;
129
130int	physmem;		/* Total physical memory */
131
132char	bootstring[512];	/* Boot command */
133int	netboot;		/* Are we netbooting? */
134int	cfe_present;
135
136struct bootinfo_v1 bootinfo;
137
138phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
139int mem_cluster_cnt;
140
141void	configure(void);
142void	mach_init(long, long, long, long);
143
144/*
145 * safepri is a safe priority for sleep to set for a spin-wait during
146 * autoconfiguration or after a panic.  Used as an argument to splx().
147 */
148int	safepri = MIPS_INT_MASK | MIPS_SR_INT_IE;
149
150extern caddr_t esym;
151extern struct user *proc0paddr;
152
153/*
154 * Do all the stuff that locore normally does before calling main().
155 */
156void
157mach_init(long fwhandle, long magic, long bootdata, long reserved)
158{
159	caddr_t kernend, v, p0;
160	u_long first, last;
161	vsize_t size;
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 = (caddr_t)mips_round_page(end);
195#ifdef DDB
196	if (magic == BOOTINFO_MAGIC) {
197		ksym_start = (void *)bootinfo.ssym;
198		ksym_end   = (void *)bootinfo.esym;
199		kernend = (caddr_t)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 %08llX len %08llX: %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		mem_clusters[0].start = 0;
265		mem_clusters[0].size = ctob(physmem);
266		mem_cluster_cnt = 1;
267	}
268
269
270	for (i = 0; i < sizeof(bootinfo.boot_flags); i++) {
271		switch (bootinfo.boot_flags[i]) {
272		case '\0':
273			break;
274		case ' ':
275			continue;
276		case '-':
277			while (bootinfo.boot_flags[i] != ' ' &&
278			    bootinfo.boot_flags[i] != '\0') {
279				switch (bootinfo.boot_flags[i]) {
280				case 'a':
281					boothowto |= RB_ASKNAME;
282					break;
283				case 'd':
284					boothowto |= RB_KDB;
285					break;
286				case 's':
287					boothowto |= RB_SINGLE;
288					break;
289				}
290				i++;
291			}
292		}
293	}
294
295	/*
296	 * Load the rest of the available pages into the VM system.
297	 * The first chunk is tricky because we have to avoid the
298	 * kernel, but the rest are easy.
299	 */
300	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
301	last = mem_clusters[0].start + mem_clusters[0].size;
302	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
303		VM_FREELIST_DEFAULT);
304
305	for (i = 1; i < mem_cluster_cnt; i++) {
306		first = round_page(mem_clusters[i].start);
307		last = mem_clusters[i].start + mem_clusters[i].size;
308		uvm_page_physload(atop(first), atop(last), atop(first),
309		    atop(last), VM_FREELIST_DEFAULT);
310	}
311
312	/*
313	 * Initialize error message buffer (at end of core).
314	 */
315	mips_init_msgbuf();
316
317	/*
318	 * Allocate space for proc0's USPACE
319	 */
320	p0 = (caddr_t)pmap_steal_memory(USPACE, NULL, NULL);
321	proc0.p_addr = proc0paddr = (struct user *)p0;
322	proc0.p_md.md_regs = (struct frame *)(p0 + USPACE) - 1;
323	curpcb = &proc0.p_addr->u_pcb;
324	curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
325
326	/*
327	 * Allocate space for system data structures.  These data structures
328	 * are allocated here instead of cpu_startup() because physical
329	 * memory is directly addressable.  We don't have to map these into
330	 * virtual address space.
331	 */
332	size = (vsize_t)allocsys(NULL, NULL);
333	v = (caddr_t)pmap_steal_memory(size, NULL, NULL);
334	if ((allocsys(v, NULL) - v) != size)
335		panic("mach_init: table size inconsistency");
336
337	pmap_bootstrap();
338
339	/*
340	 * Initialize debuggers, and break into them, if appropriate.
341	 */
342#if defined(DDB)
343	ddb_init(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
344	    ksym_start, ksym_end);
345#endif
346
347	if (boothowto & RB_KDB) {
348#if defined(DDB)
349		Debugger();
350#endif
351	}
352}
353
354/*
355 * Allocate memory for variable-sized tables,
356 */
357void
358cpu_startup(void)
359{
360	u_int i, base, residual;
361	vaddr_t minaddr, maxaddr;
362	vsize_t size;
363	char pbuf[9];
364
365	/*
366	 * Good {morning,afternoon,evening,night}.
367	 */
368	printf(version);
369	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
370	printf("%s memory", pbuf);
371
372	/*
373	 * Allocate virtual address space for file I/O buffers.
374	 * Note they are different than the array of headers, 'buf',
375	 * and usually occupy more virtual memory than physical.
376	 */
377	size = MAXBSIZE * nbuf;
378	if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(size),
379		    NULL, UVM_UNKNOWN_OFFSET, 0,
380		    UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
381		    UVM_ADV_NORMAL, 0)) != 0)
382		panic("startup: cannot allocate VM for buffers");
383	minaddr = (vaddr_t)buffers;
384	base = bufpages / nbuf;
385	residual = bufpages % nbuf;
386	for (i = 0; i < nbuf; i++) {
387		vsize_t curbufsize;
388		vaddr_t curbuf;
389		struct vm_page *pg;
390
391		/*
392		 * Each buffer has MAXBSIZE bytes of VM space allocated.  Of
393		 * that MAXBSIZE space, we allocate and map (base+1) pages
394		 * for the first "residual" buffers, and then we allocate
395		 * "base" pages for the rest.
396		 */
397		curbuf = (vaddr_t) buffers + (i * MAXBSIZE);
398		curbufsize = NBPG * ((i < residual) ? (base + 1) : base);
399
400		while (curbufsize) {
401			pg = uvm_pagealloc(NULL, 0, NULL, 0);
402			if (pg == NULL)
403				panic("cpu_startup: not enough memory for "
404					"buffer cache");
405			pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg),
406			    VM_PROT_READ|VM_PROT_WRITE);
407			curbuf += PAGE_SIZE;
408			curbufsize -= PAGE_SIZE;
409		}
410	}
411
412	/*
413	 * Allocate a submap for exec arguments.  This map effectively
414	 * limits the number of processes exec'ing at any time.
415	 */
416	exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 16 * NCARGS,
417	    VM_MAP_PAGEABLE, FALSE, NULL);
418	/*
419	 * Allocate a submap for physio.
420	 */
421	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, VM_PHYS_SIZE,
422	    0, FALSE, NULL);
423
424
425	/*
426	 * (No need to allocate an mbuf cluster submap.  Mbuf clusters
427	 * are allocated via the pool allocator, and we use KSEG to
428	 * map those pages.)
429	 */
430
431	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
432	printf(", %s free", pbuf);
433	format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG);
434	printf(", %s in %u buffers\n", pbuf, nbuf);
435
436	/*
437	 * Set up buffers, so they can be used to read disk labels.
438	 */
439	bufinit();
440}
441
442int	waittime = -1;
443
444void
445cpu_reboot(int howto, char *bootstr)
446{
447
448	/* Take a snapshot before clobbering any registers. */
449	if (curproc)
450		savectx((struct user *)curpcb);
451
452	if (cold) {
453		howto |= RB_HALT;
454		goto haltsys;
455	}
456
457	/* If "always halt" was specified as a boot flag, obey. */
458	if (boothowto & RB_HALT)
459		howto |= RB_HALT;
460
461	boothowto = howto;
462	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
463		waittime = 0;
464		vfs_shutdown();
465
466		/*
467		 * If we've been adjusting the clock, the todr
468		 * will be out of synch; adjust it now.
469		 */
470		resettodr();
471	}
472
473	splhigh();
474
475	if (howto & RB_DUMP)
476		dumpsys();
477
478haltsys:
479	doshutdownhooks();
480
481	if (howto & RB_HALT) {
482		printf("\n");
483		printf("The operating system has halted.\n");
484		printf("Please press any key to reboot.\n\n");
485		cnpollc(1);	/* For proper keyboard command handling */
486		cngetc();
487		cnpollc(0);
488	}
489
490	printf("rebooting...\n\n");
491
492	if (cfe_present) {
493		/*
494		 * XXX
495		 * For some reason we can't return to CFE with
496		 * and do a warm start.  Need to look into this...
497		 */
498		cfe_exit(0, (howto & RB_DUMP) ? 1 : 0);
499		printf("cfe_exit didn't!\n");
500	}
501
502	printf("WARNING: reboot failed!\n");
503
504	for (;;);
505}
506
507static void
508cswarm_setled(u_int index, char c)
509{
510	volatile u_char *led_ptr =
511	    (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS);
512
513	if (index < 4)
514		led_ptr[0x20 + ((3 - index) << 3)] = c;
515}
516
517void
518cswarm_setleds(const char *str)
519{
520	int i;
521
522	for (i = 0; i < 4 && str[i]; i++)
523		cswarm_setled(i, str[i]);
524	for (; i < 4; i++)
525		cswarm_setled(' ', str[i]);
526}
527
528int
529sbmips_cca_for_pa(paddr_t pa)
530{
531	int rv;
532
533	/* Check each DRAM region. */
534	if ((pa >= 0x0000000000 && pa <= 0x000fffffff) ||	/* DRAM 0 */
535	    (pa >= 0x0080000000 && pa <= 0x008fffffff) ||	/* DRAM 1 */
536	    (pa >= 0x0090000000 && pa <= 0x009fffffff) ||	/* DRAM 2 */
537	    (pa >= 0x00c0000000 && pa <= 0x00cfffffff) ||	/* DRAM 3 */
538#ifdef _MIPS_PADDR_T_64BIT
539	    (pa >= 0x0100000000 && pa <= 0x07ffffffff) ||	/* DRAM exp */
540#endif
541	   0) {
542		rv = 5;		/* Cacheable coherent. */
543		goto done;
544	}
545
546	rv = 2;			/* Uncached. */
547done:
548	return (rv);
549}
550