1/* $NetBSD: machdep.c,v 1.8 2024/03/05 14:15:31 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 1.8 2024/03/05 14:15:31 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 <evbmips/sbmips/autoconf.h>
96#include <evbmips/sbmips/swarm.h>
97#include <evbmips/sbmips/systemsw.h>
98
99#if 0 /* XXXCGD */
100#include <evbmips/sbmips/nvram.h>
101#endif /* XXXCGD */
102#include <evbmips/sbmips/leds.h>
103
104#include <mips/sibyte/dev/sbbuswatchvar.h>
105
106#include "ksyms.h"
107
108#if NKSYMS || defined(DDB) || defined(MODULAR)
109#include <mips/db_machdep.h>
110#include <ddb/db_access.h>
111#include <ddb/db_sym.h>
112#include <ddb/db_extern.h>
113#include <sys/exec_elf.h>
114#endif
115
116#include <dev/cons.h>
117
118#if NKSYMS || defined(DDB) || defined(MODULAR)
119/* start and end of kernel symbol table */
120void	*ksym_start, *ksym_end;
121#endif
122
123/* Maps for VM objects. */
124struct vm_map *phys_map = NULL;
125
126char	bootstring[512];	/* Boot command */
127int	netboot;		/* Are we netbooting? */
128int	cfe_present;
129
130struct bootinfo_v1 bootinfo;
131
132phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
133int mem_cluster_cnt;
134
135void	configure(void);
136void	mach_init(long, long, long, long);
137
138extern void *esym;
139
140#ifdef _LP64
141/*
142 * We do this KSEG0 to PHYS to KSEG0 dance if running 64-bit because
143 * CFE passes in parameters as 32-bit addresses.  When used as a 64-bit
144 * address these CFE parameters are in user (XKUSEG) space and can't be
145 * accessed!  Convert these to a physical address and and then to the
146 * proper KSEG0 address so we can use them in the kernel.
147 */
148#define	CFE_TO_KERNEL_PTR(x)	MIPS_PHYS_TO_KSEG0(MIPS_KSEG0_TO_PHYS(x))
149#else
150#define	CFE_TO_KERNEL_PTR(x)	(x)
151#endif
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	void *kernend;
160	extern char edata[], end[];
161	uint32_t config;
162
163	/* XXX this code must run on the target CPU */
164	config = mips3_cp0_config_read();
165	config &= ~MIPS3_CONFIG_K0_MASK;
166	config |= 0x05;				/* XXX.  cacheable coherent */
167	mips3_cp0_config_write(config);
168
169	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
170	memset(edata, 0, end - edata);
171
172	/*
173	 * Copy the bootinfo structure from the boot loader.
174	 * this has to be done before mips_vector_init is
175	 * called because we may need CFE's TLB handler
176	 */
177
178	if (magic == BOOTINFO_MAGIC)
179		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
180		    sizeof bootinfo);
181	else if (reserved == CFE_EPTSEAL) {
182		magic = BOOTINFO_MAGIC;
183		memset(&bootinfo, 0, sizeof bootinfo);
184		bootinfo.version = BOOTINFO_VERSION;
185		bootinfo.fwhandle = fwhandle;
186		bootinfo.fwentry = bootdata;
187		bootinfo.ssym = (vaddr_t)end;
188		bootinfo.esym = (vaddr_t)end;
189	}
190
191	kernend = (void *)mips_round_page(end);
192#if NKSYMS || defined(DDB) || defined(MODULAR)
193	if (magic == BOOTINFO_MAGIC) {
194		ksym_start = (void *)CFE_TO_KERNEL_PTR(bootinfo.ssym);
195		ksym_end   = (void *)CFE_TO_KERNEL_PTR(bootinfo.esym);
196		kernend = (void *)mips_round_page((vaddr_t)ksym_end);
197	}
198#endif
199
200	consinit();
201
202	uvm_md_init();
203
204	/*
205	 * Copy exception-dispatch code down to exception vector.
206	 * Initialize locore-function vector.
207	 * Clear out the I and D caches.
208	 */
209#ifdef MULTIPROCESSOR
210	mips_vector_init(NULL, true);
211#else
212	mips_vector_init(NULL, false);
213#endif
214
215	mips_locoresw.lsw_bus_error = sibyte_bus_watch_check;
216
217	sb1250_ipl_map_init();
218
219#ifdef DEBUG
220	printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n",
221	    (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved);
222#endif
223
224	cpu_setmodel("sb1250");
225
226	if (magic == BOOTINFO_MAGIC) {
227		int idx;
228		int added;
229		uint64_t start, len, type;
230
231		cfe_init(CFE_TO_KERNEL_PTR(bootinfo.fwhandle),
232		    CFE_TO_KERNEL_PTR(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 %08"PRIx64" len %08"PRIx64": %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 (u_int 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	 */
306	mips_page_physload(MIPS_KSEG0_START, (vaddr_t) kernend,
307	    mem_clusters, mem_cluster_cnt, NULL, 0);
308
309	/*
310	 * Initialize error message buffer (at end of core).
311	 */
312	mips_init_msgbuf();
313
314	pmap_bootstrap();
315
316	/*
317	 * Allocate uarea for lwp0 and set it.
318	 */
319	mips_init_lwp0_uarea();
320
321	/*
322	 * Initialize debuggers, and break into them, if appropriate.
323	 */
324#if NKSYMS || defined(DDB) || defined(MODULAR)
325	ksyms_addsyms_elf(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
326	    ksym_start, ksym_end);
327#endif
328
329	if (boothowto & RB_KDB) {
330#if defined(DDB)
331		Debugger();
332#endif
333	}
334
335#ifdef MULTIPROCESSOR
336	mips_fixup_exceptions(mips_fixup_zero_relative, NULL);
337#endif
338}
339
340/*
341 * Allocate memory for variable-sized tables,
342 */
343void
344cpu_startup(void)
345{
346	/*
347	 * Just do the common stuff.
348	 */
349	cpu_startup_common();
350}
351
352int	waittime = -1;
353
354void
355cpu_reboot(int howto, char *bootstr)
356{
357
358	/* Take a snapshot before clobbering any registers. */
359	savectx(curpcb);
360
361	if (cold) {
362		howto |= RB_HALT;
363		goto haltsys;
364	}
365
366	/* If "always halt" was specified as a boot flag, obey. */
367	if (boothowto & RB_HALT)
368		howto |= RB_HALT;
369
370	boothowto = howto;
371	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
372		waittime = 0;
373		vfs_shutdown();
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