1/* $NetBSD: machdep.c,v 1.58 2024/03/05 14:15:35 thorpej 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 1.58 2024/03/05 14:15:35 thorpej 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/buf.h>
69#include <sys/conf.h>
70#include <sys/cpu.h>
71#include <sys/device.h>
72#include <sys/exec.h>
73#include <sys/file.h>
74#include <sys/intr.h>
75#include <sys/kcore.h>
76#include <sys/kernel.h>
77#include <sys/ksyms.h>
78#include <sys/mbuf.h>
79#include <sys/mount.h>
80#include <sys/msgbuf.h>
81#include <sys/proc.h>
82#include <sys/reboot.h>
83#include <sys/syscallargs.h>
84#include <sys/systm.h>
85
86#include <uvm/uvm_extern.h>
87
88#include <mips/locore.h>
89#include <mips/psl.h>
90#include <mips/pte.h>
91#include <mips/reg.h>
92
93#include <mips/cfe/cfe_api.h>
94
95#include <sbmips/autoconf.h>
96#include <sbmips/swarm.h>
97
98#if 0 /* XXXCGD */
99#include <sbmips/nvram.h>
100#endif /* XXXCGD */
101#include <sbmips/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 <mips/db_machdep.h>
109#include <ddb/db_access.h>
110#include <ddb/db_sym.h>
111#include <ddb/db_extern.h>
112#include <sys/exec_elf.h>
113#endif
114
115#include <dev/cons.h>
116
117#if NKSYMS || defined(DDB) || defined(MODULAR)
118/* start and end of kernel symbol table */
119void	*ksym_start, *ksym_end;
120#endif
121
122/* Maps for VM objects. */
123struct vm_map *phys_map = NULL;
124
125char	bootstring[512];	/* Boot command */
126int	netboot;		/* Are we netbooting? */
127int	cfe_present;
128
129struct bootinfo_v1 bootinfo;
130
131phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
132int mem_cluster_cnt;
133
134void	configure(void);
135void	mach_init(long, long, long, long);
136
137extern void *esym;
138
139/*
140 * Do all the stuff that locore normally does before calling main().
141 */
142void
143mach_init(long fwhandle, long magic, long bootdata, long reserved)
144{
145	void *kernend;
146	extern char edata[], end[];
147	uint32_t config;
148
149	/* XXX this code must run on the target CPU */
150	config = mips3_cp0_config_read();
151	config &= ~MIPS3_CONFIG_K0_MASK;
152	config |= 0x05;				/* XXX.  cacheable coherent */
153	mips3_cp0_config_write(config);
154
155	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
156	memset(edata, 0, end - edata);
157
158	/*
159	 * Copy the bootinfo structure from the boot loader.
160	 * this has to be done before mips_vector_init is
161	 * called because we may need CFE's TLB handler
162	 */
163
164	if (magic == BOOTINFO_MAGIC)
165		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
166		    sizeof bootinfo);
167	else if (reserved == CFE_EPTSEAL) {
168		magic = BOOTINFO_MAGIC;
169		memset(&bootinfo, 0, sizeof bootinfo);
170		bootinfo.version = BOOTINFO_VERSION;
171		bootinfo.fwhandle = fwhandle;
172		bootinfo.fwentry = bootdata;
173		bootinfo.ssym = (vaddr_t)end;
174		bootinfo.esym = (vaddr_t)end;
175	}
176
177	kernend = (void *)mips_round_page(end);
178#if NKSYMS || defined(DDB) || defined(MODULAR)
179	if (magic == BOOTINFO_MAGIC) {
180		ksym_start = (void *)(intptr_t)bootinfo.ssym;
181		ksym_end   = (void *)(intptr_t)bootinfo.esym;
182		kernend = (void *)mips_round_page((vaddr_t)ksym_end);
183	}
184#endif
185
186	consinit();
187
188	uvm_md_init();
189
190	/*
191	 * Copy exception-dispatch code down to exception vector.
192	 * Initialize locore-function vector.
193	 * Clear out the I and D caches.
194	 */
195#ifdef MULTIPROCESSOR
196	mips_vector_init(NULL, true);
197#else
198	mips_vector_init(NULL, false);
199#endif
200
201	mips_locoresw.lsw_bus_error = sibyte_bus_watch_check;
202
203	sb1250_ipl_map_init();
204
205#ifdef DEBUG
206	printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n",
207	    (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved);
208#endif
209
210	cpu_setmodel("sb1250");
211
212	if (magic == BOOTINFO_MAGIC) {
213		int idx;
214		int added;
215		uint64_t start, len, type;
216
217		cfe_init(bootinfo.fwhandle, bootinfo.fwentry);
218		cfe_present = 1;
219
220		idx = 0;
221		physmem = 0;
222		mem_cluster_cnt = 0;
223		while (cfe_enummem(idx, 0, &start, &len, &type) == 0) {
224			added = 0;
225			printf("Memory Block #%d start %08"PRIx64"X len %08"PRIx64"X: %s: ",
226			    idx, start, len, (type == CFE_MI_AVAILABLE) ?
227			    "Available" : "Reserved");
228			if ((type == CFE_MI_AVAILABLE) &&
229			    (mem_cluster_cnt < VM_PHYSSEG_MAX)) {
230				/*
231				 * XXX Ignore memory above 256MB for now, it
232				 * XXX needs special handling.
233				 */
234				if (start < (256*1024*1024)) {
235				    physmem += btoc(((int) len));
236				    mem_clusters[mem_cluster_cnt].start =
237					(long) start;
238				    mem_clusters[mem_cluster_cnt].size =
239					(long) len;
240				    mem_cluster_cnt++;
241				    added = 1;
242				}
243			}
244			if (added)
245				printf("added to map\n");
246			else
247				printf("not added to map\n");
248			idx++;
249		}
250
251	} else {
252		/*
253		 * Handle the case of not being called from the firmware.
254		 */
255		/* XXX hardwire to 32MB; should be kernel config option */
256		physmem = 32 * 1024 * 1024 / 4096;
257		mem_clusters[0].start = 0;
258		mem_clusters[0].size = ctob(physmem);
259		mem_cluster_cnt = 1;
260	}
261
262
263	for (u_int i = 0; i < sizeof(bootinfo.boot_flags); i++) {
264		switch (bootinfo.boot_flags[i]) {
265		case '\0':
266			break;
267		case ' ':
268			continue;
269		case '-':
270			while (bootinfo.boot_flags[i] != ' ' &&
271			    bootinfo.boot_flags[i] != '\0') {
272				switch (bootinfo.boot_flags[i]) {
273				case 'a':
274					boothowto |= RB_ASKNAME;
275					break;
276				case 'd':
277					boothowto |= RB_KDB;
278					break;
279				case 's':
280					boothowto |= RB_SINGLE;
281					break;
282				}
283				i++;
284			}
285		}
286	}
287
288	/*
289	 * Load the rest of the available pages into the VM system.
290	 */
291	mips_page_physload(MIPS_KSEG0_START, (vaddr_t) kernend,
292	    mem_clusters, mem_cluster_cnt, NULL, 0);
293
294	/*
295	 * Initialize error message buffer (at end of core).
296	 */
297	mips_init_msgbuf();
298
299	pmap_bootstrap();
300
301	/*
302	 * Allocate uarea for lwp0 and set it.
303	 */
304	mips_init_lwp0_uarea();
305
306	/*
307	 * Initialize debuggers, and break into them, if appropriate.
308	 */
309#if NKSYMS || defined(DDB) || defined(MODULAR)
310	ksyms_addsyms_elf(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
311	    ksym_start, ksym_end);
312#endif
313
314	if (boothowto & RB_KDB) {
315#if defined(DDB)
316		Debugger();
317#endif
318	}
319
320#ifdef MULTIPROCESSOR
321	mips_fixup_exceptions(mips_fixup_zero_relative, NULL);
322#endif
323}
324
325/*
326 * Allocate memory for variable-sized tables,
327 */
328void
329cpu_startup(void)
330{
331	/*
332	 * Just do the common stuff.
333	 */
334	cpu_startup_common();
335}
336
337int	waittime = -1;
338
339void
340cpu_reboot(int howto, char *bootstr)
341{
342
343	/* Take a snapshot before clobbering any registers. */
344	savectx(curpcb);
345
346	if (cold) {
347		howto |= RB_HALT;
348		goto haltsys;
349	}
350
351	/* If "always halt" was specified as a boot flag, obey. */
352	if (boothowto & RB_HALT)
353		howto |= RB_HALT;
354
355	boothowto = howto;
356	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
357		waittime = 0;
358		vfs_shutdown();
359	}
360
361	splhigh();
362
363	if (howto & RB_DUMP)
364		dumpsys();
365
366haltsys:
367	doshutdownhooks();
368
369	pmf_system_shutdown(boothowto);
370
371	if (howto & RB_HALT) {
372		printf("\n");
373		printf("The operating system has halted.\n");
374		printf("Please press any key to reboot.\n\n");
375		cnpollc(1);	/* For proper keyboard command handling */
376		cngetc();
377		cnpollc(0);
378	}
379
380	printf("rebooting...\n\n");
381
382	if (cfe_present) {
383		/*
384		 * XXX
385		 * For some reason we can't return to CFE with
386		 * and do a warm start.  Need to look into this...
387		 */
388		cfe_exit(0, (howto & RB_DUMP) ? 1 : 0);
389		printf("cfe_exit didn't!\n");
390	}
391
392	printf("WARNING: reboot failed!\n");
393
394	for (;;);
395}
396
397static void
398cswarm_setled(u_int index, char c)
399{
400	volatile u_char *led_ptr =
401	    (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS);
402
403	if (index < 4)
404		led_ptr[0x20 + ((3 - index) << 3)] = c;
405}
406
407void
408cswarm_setleds(const char *str)
409{
410	int i;
411
412	for (i = 0; i < 4 && str[i]; i++)
413		cswarm_setled(i, str[i]);
414	for (; i < 4; i++)
415		cswarm_setled(' ', str[i]);
416}
417
418int
419sbmips_cca_for_pa(paddr_t pa)
420{
421	int rv;
422
423	rv = 2;			/* Uncached. */
424
425	/* Check each DRAM region. */
426	if ((pa >= 0x0000000000   && pa <= 0x000fffffff) ||	/* DRAM 0 */
427	    (pa >= 0x0080000000   && pa <= 0x008fffffff) ||	/* DRAM 1 */
428	    (pa >= 0x0090000000   && pa <= 0x009fffffff) ||	/* DRAM 2 */
429	    (pa >= 0x00c0000000   && pa <= 0x00cfffffff) ||	/* DRAM 3 */
430#ifdef _MIPS_PADDR_T_64BIT
431	    (pa >= 0x0100000000LL && pa <= 0x07ffffffffLL) ||	/* DRAM exp */
432#endif
433	   0) {
434		rv = 5;		/* Cacheable coherent. */
435	}
436
437	return (rv);
438}
439