machdep.c revision 1.5 
1/* $NetBSD: machdep.c,v 1.5 2019/04/01 06:33:57 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 1.5 2019/04/01 06:33:57 simonb 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/malloc.h>
79#include <sys/mbuf.h>
80#include <sys/mount.h>
81#include <sys/msgbuf.h>
82#include <sys/proc.h>
83#include <sys/reboot.h>
84#include <sys/syscallargs.h>
85#include <sys/systm.h>
86
87#include <uvm/uvm_extern.h>
88
89#include <mips/locore.h>
90#include <mips/psl.h>
91#include <mips/pte.h>
92#include <mips/reg.h>
93
94#include <mips/cfe/cfe_api.h>
95
96#include <evbmips/sbmips/autoconf.h>
97#include <evbmips/sbmips/swarm.h>
98#include <evbmips/sbmips/systemsw.h>
99
100#if 0 /* XXXCGD */
101#include <evbmips/sbmips/nvram.h>
102#endif /* XXXCGD */
103#include <evbmips/sbmips/leds.h>
104
105#include <mips/sibyte/dev/sbbuswatchvar.h>
106
107#include "ksyms.h"
108
109#if NKSYMS || defined(DDB) || defined(MODULAR)
110#include <mips/db_machdep.h>
111#include <ddb/db_access.h>
112#include <ddb/db_sym.h>
113#include <ddb/db_extern.h>
114#include <sys/exec_elf.h>
115#endif
116
117#include <dev/cons.h>
118
119#if NKSYMS || defined(DDB) || defined(MODULAR)
120/* start and end of kernel symbol table */
121void	*ksym_start, *ksym_end;
122#endif
123
124/* Maps for VM objects. */
125struct vm_map *phys_map = NULL;
126
127char	bootstring[512];	/* Boot command */
128int	netboot;		/* Are we netbooting? */
129int	cfe_present;
130
131struct bootinfo_v1 bootinfo;
132
133phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
134int mem_cluster_cnt;
135
136void	configure(void);
137void	mach_init(long, long, long, long);
138
139extern void *esym;
140
141#ifdef _LP64
142/*
143 * We do this KSEG0 to PHYS to KSEG0 dance if running 64-bit because
144 * CFE passes in parameters as 32-bit addresses.  When used as a 64-bit
145 * address these CFE parameters are in user (XKUSEG) space and can't be
146 * accessed!  Convert these to a physical address and and then to the
147 * proper KSEG0 address so we can use them in the kernel.
148 */
149#define	CFE_TO_KERNEL_PTR(x)	MIPS_PHYS_TO_KSEG0(MIPS_KSEG0_TO_PHYS(x))
150#else
151#define	CFE_TO_KERNEL_PTR(x)	(x)
152#endif
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;
161	extern char edata[], end[];
162	uint32_t config;
163
164	/* XXX this code must run on the target CPU */
165	config = mips3_cp0_config_read();
166	config &= ~MIPS3_CONFIG_K0_MASK;
167	config |= 0x05;				/* XXX.  cacheable coherent */
168	mips3_cp0_config_write(config);
169
170	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
171	memset(edata, 0, end - edata);
172
173	/*
174	 * Copy the bootinfo structure from the boot loader.
175	 * this has to be done before mips_vector_init is
176	 * called because we may need CFE's TLB handler
177	 */
178
179	if (magic == BOOTINFO_MAGIC)
180		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
181		    sizeof bootinfo);
182	else if (reserved == CFE_EPTSEAL) {
183		magic = BOOTINFO_MAGIC;
184		memset(&bootinfo, 0, sizeof bootinfo);
185		bootinfo.version = BOOTINFO_VERSION;
186		bootinfo.fwhandle = fwhandle;
187		bootinfo.fwentry = bootdata;
188		bootinfo.ssym = (vaddr_t)end;
189		bootinfo.esym = (vaddr_t)end;
190	}
191
192	kernend = (void *)mips_round_page(end);
193#if NKSYMS || defined(DDB) || defined(MODULAR)
194	if (magic == BOOTINFO_MAGIC) {
195		ksym_start = (void *)CFE_TO_KERNEL_PTR(bootinfo.ssym);
196		ksym_end   = (void *)CFE_TO_KERNEL_PTR(bootinfo.esym);
197		kernend = (void *)mips_round_page((vaddr_t)ksym_end);
198	}
199#endif
200
201	consinit();
202
203	uvm_md_init();
204
205	/*
206	 * Copy exception-dispatch code down to exception vector.
207	 * Initialize locore-function vector.
208	 * Clear out the I and D caches.
209	 */
210#ifdef MULTIPROCESSOR
211	mips_vector_init(NULL, true);
212#else
213	mips_vector_init(NULL, false);
214#endif
215
216	mips_locoresw.lsw_bus_error = sibyte_bus_watch_check;
217
218	sb1250_ipl_map_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	cpu_setmodel("sb1250");
226
227	if (magic == BOOTINFO_MAGIC) {
228		int idx;
229		int added;
230		uint64_t start, len, type;
231
232		cfe_init(CFE_TO_KERNEL_PTR(bootinfo.fwhandle),
233		    CFE_TO_KERNEL_PTR(bootinfo.fwentry));
234		cfe_present = 1;
235
236		idx = 0;
237		physmem = 0;
238		mem_cluster_cnt = 0;
239		while (cfe_enummem(idx, 0, &start, &len, &type) == 0) {
240			added = 0;
241			printf("Memory Block #%d start %08"PRIx64" len %08"PRIx64": %s: ",
242			    idx, start, len, (type == CFE_MI_AVAILABLE) ?
243			    "Available" : "Reserved");
244			if ((type == CFE_MI_AVAILABLE) &&
245			    (mem_cluster_cnt < VM_PHYSSEG_MAX)) {
246				/*
247				 * XXX Ignore memory above 256MB for now, it
248				 * XXX needs special handling.
249				 */
250				if (start < (256*1024*1024)) {
251				    physmem += btoc(((int) len));
252				    mem_clusters[mem_cluster_cnt].start =
253					(long) start;
254				    mem_clusters[mem_cluster_cnt].size =
255					(long) len;
256				    mem_cluster_cnt++;
257				    added = 1;
258				}
259			}
260			if (added)
261				printf("added to map\n");
262			else
263				printf("not added to map\n");
264			idx++;
265		}
266
267	} else {
268		/*
269		 * Handle the case of not being called from the firmware.
270		 */
271		/* XXX hardwire to 32MB; should be kernel config option */
272		physmem = 32 * 1024 * 1024 / 4096;
273		mem_clusters[0].start = 0;
274		mem_clusters[0].size = ctob(physmem);
275		mem_cluster_cnt = 1;
276	}
277
278
279	for (u_int i = 0; i < sizeof(bootinfo.boot_flags); i++) {
280		switch (bootinfo.boot_flags[i]) {
281		case '\0':
282			break;
283		case ' ':
284			continue;
285		case '-':
286			while (bootinfo.boot_flags[i] != ' ' &&
287			    bootinfo.boot_flags[i] != '\0') {
288				switch (bootinfo.boot_flags[i]) {
289				case 'a':
290					boothowto |= RB_ASKNAME;
291					break;
292				case 'd':
293					boothowto |= RB_KDB;
294					break;
295				case 's':
296					boothowto |= RB_SINGLE;
297					break;
298				}
299				i++;
300			}
301		}
302	}
303
304	/*
305	 * Load the rest of the available pages into the VM system.
306	 */
307	mips_page_physload(MIPS_KSEG0_START, (vaddr_t) kernend,
308	    mem_clusters, mem_cluster_cnt, NULL, 0);
309
310	/*
311	 * Initialize error message buffer (at end of core).
312	 */
313	mips_init_msgbuf();
314
315	pmap_bootstrap();
316
317	/*
318	 * Allocate uarea for lwp0 and set it.
319	 */
320	mips_init_lwp0_uarea();
321
322	/*
323	 * Initialize debuggers, and break into them, if appropriate.
324	 */
325#if NKSYMS || defined(DDB) || defined(MODULAR)
326	ksyms_addsyms_elf(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
327	    ksym_start, ksym_end);
328#endif
329
330	if (boothowto & RB_KDB) {
331#if defined(DDB)
332		Debugger();
333#endif
334	}
335
336#ifdef MULTIPROCESSOR
337	mips_fixup_exceptions(mips_fixup_zero_relative);
338#endif
339}
340
341/*
342 * Allocate memory for variable-sized tables,
343 */
344void
345cpu_startup(void)
346{
347	/*
348	 * Just do the common stuff.
349	 */
350	cpu_startup_common();
351}
352
353int	waittime = -1;
354
355void
356cpu_reboot(int howto, char *bootstr)
357{
358
359	/* Take a snapshot before clobbering any registers. */
360	savectx(curpcb);
361
362	if (cold) {
363		howto |= RB_HALT;
364		goto haltsys;
365	}
366
367	/* If "always halt" was specified as a boot flag, obey. */
368	if (boothowto & RB_HALT)
369		howto |= RB_HALT;
370
371	boothowto = howto;
372	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
373		waittime = 0;
374		vfs_shutdown();
375
376		/*
377		 * If we've been adjusting the clock, the todr
378		 * will be out of synch; adjust it now.
379		 */
380		resettodr();
381	}
382
383	splhigh();
384
385	if (howto & RB_DUMP)
386		dumpsys();
387
388haltsys:
389	doshutdownhooks();
390
391	pmf_system_shutdown(boothowto);
392
393	if (howto & RB_HALT) {
394		printf("\n");
395		printf("The operating system has halted.\n");
396		printf("Please press any key to reboot.\n\n");
397		cnpollc(1);	/* For proper keyboard command handling */
398		cngetc();
399		cnpollc(0);
400	}
401
402	printf("rebooting...\n\n");
403
404	if (cfe_present) {
405		/*
406		 * XXX
407		 * For some reason we can't return to CFE with
408		 * and do a warm start.  Need to look into this...
409		 */
410		cfe_exit(0, (howto & RB_DUMP) ? 1 : 0);
411		printf("cfe_exit didn't!\n");
412	}
413
414	printf("WARNING: reboot failed!\n");
415
416	for (;;);
417}
418
419static void
420cswarm_setled(u_int index, char c)
421{
422	volatile u_char *led_ptr =
423	    (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS);
424
425	if (index < 4)
426		led_ptr[0x20 + ((3 - index) << 3)] = c;
427}
428
429void
430cswarm_setleds(const char *str)
431{
432	int i;
433
434	for (i = 0; i < 4 && str[i]; i++)
435		cswarm_setled(i, str[i]);
436	for (; i < 4; i++)
437		cswarm_setled(' ', str[i]);
438}
439
440int
441sbmips_cca_for_pa(paddr_t pa)
442{
443	int rv;
444
445	rv = 2;			/* Uncached. */
446
447	/* Check each DRAM region. */
448	if ((pa >= 0x0000000000   && pa <= 0x000fffffff) ||	/* DRAM 0 */
449	    (pa >= 0x0080000000   && pa <= 0x008fffffff) ||	/* DRAM 1 */
450	    (pa >= 0x0090000000   && pa <= 0x009fffffff) ||	/* DRAM 2 */
451	    (pa >= 0x00c0000000   && pa <= 0x00cfffffff) ||	/* DRAM 3 */
452#ifdef _MIPS_PADDR_T_64BIT
453	    (pa >= 0x0100000000LL && pa <= 0x07ffffffffLL) ||	/* DRAM exp */
454#endif
455	   0) {
456		rv = 5;		/* Cacheable coherent. */
457	}
458
459	return (rv);
460}
461