1/*	$NetBSD: machdep.c,v 1.47 2024/03/05 14:15:30 thorpej Exp $	*/
2
3/*
4 * Copyright 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed for the NetBSD Project by
20 *      Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * Copyright (c) 1988 University of Utah.
40 * Copyright (c) 1992, 1993
41 *	The Regents of the University of California.  All rights reserved.
42 *
43 * This code is derived from software contributed to Berkeley by
44 * the Systems Programming Group of the University of Utah Computer
45 * Science Department, The Mach Operating System project at
46 * Carnegie-Mellon University and Ralph Campbell.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 *    notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 *    notice, this list of conditions and the following disclaimer in the
55 *    documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the University nor the names of its contributors
57 *    may be used to endorse or promote products derived from this software
58 *    without specific prior written permission.
59 *
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * SUCH DAMAGE.
71 *
72 *	@(#)machdep.c   8.3 (Berkeley) 1/12/94
73 *	from: Utah Hdr: machdep.c 1.63 91/04/24
74 */
75
76#include <sys/cdefs.h>
77__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.47 2024/03/05 14:15:30 thorpej Exp $");
78
79#include "opt_ddb.h"
80#include "opt_execfmt.h"
81#include "opt_modular.h"
82
83#include <sys/param.h>
84#include <sys/boot_flag.h>
85#include <sys/buf.h>
86#include <sys/cpu.h>
87#include <sys/device.h>
88#include <sys/kcore.h>
89#include <sys/kernel.h>
90#include <sys/ksyms.h>
91#include <sys/mount.h>
92#include <sys/reboot.h>
93#include <sys/systm.h>
94#include <sys/termios.h>
95
96#include <uvm/uvm_extern.h>
97
98#include <dev/cons.h>
99
100#include "ksyms.h"
101
102#if NKSYMS || defined(DDB) || defined(MODULAR)
103#include <mips/db_machdep.h>
104#include <ddb/db_extern.h>
105#endif
106
107#include <machine/yamon.h>
108
109#include <mips/locore.h>
110#include <mips/psl.h>
111
112#include <evbmips/malta/autoconf.h>
113#include <evbmips/malta/maltareg.h>
114#include <evbmips/malta/maltavar.h>
115
116#include "com.h"
117#if NCOM > 0
118#include <dev/ic/comreg.h>
119#include <dev/ic/comvar.h>
120
121int	comcnrate = 38400;	/* XXX should be config option */
122#endif /* NCOM > 0 */
123
124
125#define REGVAL(x)       *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x))))
126
127struct malta_config malta_configuration;
128
129/* Maps for VM objects. */
130struct vm_map *phys_map = NULL;
131
132int	netboot;		/* Are we netbooting? */
133
134yamon_env_var *yamon_envp;
135
136phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
137int mem_cluster_cnt;
138
139void	configure(void);
140void	mach_init(int, char **, yamon_env_var *, u_long);
141
142/*
143 * Do all the stuff that locore normally does before calling main().
144 */
145void
146mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
147{
148	struct malta_config *mcp = &malta_configuration;
149	uint8_t * const brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES);
150	bus_space_handle_t sh;
151	void *kernend;
152	int freqok;
153
154	extern char edata[], end[];
155
156	CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0);
157
158	*brkres = 0;	/* Disable BREAK==reset on console */
159
160	/* Get the propaganda in early! */
161	led_display_str("NetBSD");
162
163	/*
164	 * Clear the BSS segment.
165	 */
166	kernend = (void *)mips_round_page(end);
167	memset(edata, 0, (char *)kernend - edata);
168
169	/* save the yamon environment pointer */
170	yamon_envp = envp;
171
172	/* Use YAMON callbacks for early console I/O */
173	cn_tab = &yamon_promcd;
174
175	/*
176	 * Set up the exception vectors and CPU-specific function
177	 * vectors early on.  We need the wbflush() vector set up
178	 * before comcnattach() is called (or at least before the
179	 * first printf() after that is called).
180	 * Also clears the I+D caches.
181	 */
182	mips_vector_init(NULL, false);
183
184	uvm_md_init();
185
186	physmem = btoc(memsize);
187
188	/*
189	 * Use YAMON's CPU frequency if available.
190	 */
191	freqok = yamon_setcpufreq(1);
192
193	gt_pci_init(&mcp->mc_pc, &mcp->mc_gt);
194	malta_bus_io_init(&mcp->mc_iot, mcp);
195	malta_bus_mem_init(&mcp->mc_memt, mcp);
196	malta_dma_init(mcp);
197
198	/*
199	 * Calibrate the timer if YAMON failed to tell us.
200	 */
201	if (!freqok) {
202		bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh);
203		malta_cal_timer(&mcp->mc_iot, sh);
204		bus_space_unmap(&mcp->mc_iot, sh, 2);
205	}
206
207#if NCOM > 0
208	/*
209	 * Delay to allow firmware putchars to complete.
210	 * FIFO depth * character time.
211	 * character time = (1000000 / (defaultrate / 10))
212	 */
213	delay(160000000 / comcnrate);
214	if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate,
215	    COM_FREQ, COM_TYPE_NORMAL,
216	    (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
217		panic("malta: unable to initialize serial console");
218#else
219	panic("malta: not configured to use serial console");
220#endif /* NCOM > 0 */
221
222	mem_clusters[0].start = 0;
223	mem_clusters[0].size = ctob(physmem);
224	mem_cluster_cnt = 1;
225
226	cpu_setmodel("MIPS Malta Evaluation Board");
227
228	/*
229	 * XXX: check argv[0] - do something if "gdb"???
230	 */
231
232	/*
233	 * Look at arguments passed to us and compute boothowto.
234	 */
235	boothowto = RB_AUTOBOOT;
236#ifndef _LP64
237	for (int i = 1; i < argc; i++) {
238		for (char *cp = argv[i]; *cp; cp++) {
239			int howto;
240			/* Ignore superfluous '-', if there is one */
241			if (*cp == '-')
242				continue;
243
244			howto = 0;
245			BOOT_FLAG(*cp, howto);
246			if (! howto)
247				printf("bootflag '%c' not recognised\n", *cp);
248			else
249				boothowto |= howto;
250		}
251	}
252#endif
253
254	/*
255	 * Load the rest of the available pages into the VM system.
256	 */
257	mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
258	    mem_clusters, mem_cluster_cnt, NULL, 0);
259
260	/*
261	 * Initialize error message buffer (at end of core).
262	 */
263	mips_init_msgbuf();
264
265	pmap_bootstrap();
266
267	/*
268	 * Allocate uarea page for lwp0 and set it.
269	 */
270	mips_init_lwp0_uarea();
271
272	/*
273	 * Initialize debuggers, and break into them, if appropriate.
274	 */
275#if defined(DDB)
276	if (boothowto & RB_KDB)
277		Debugger();
278#endif
279
280#if defined(MULTIPROCESSOR) && 0
281	/*
282	 * We can never be running on more than one processor but we can dream.
283	 */
284	mips_fixup_exceptions(mips_fixup_zero_relative, NULL);
285#endif
286}
287
288void
289consinit(void)
290{
291
292	/*
293	 * Everything related to console initialization is done
294	 * in mach_init().
295	 */
296}
297
298/*
299 * Allocate memory for variable-sized tables,
300 */
301void
302cpu_startup(void)
303{
304	/*
305	 * Do the common startup items.
306	 */
307	cpu_startup_common();
308
309	/*
310	 * Virtual memory is bootstrapped -- notify the bus spaces
311	 * that memory allocation is now safe.
312	 */
313	malta_configuration.mc_mallocsafe = 1;
314}
315
316int	waittime = -1;
317
318void
319cpu_reboot(int howto, char *bootstr)
320{
321
322	/* Take a snapshot before clobbering any registers. */
323	savectx(curpcb);
324
325	if (cold) {
326		howto |= RB_HALT;
327		goto haltsys;
328	}
329
330	/* If "always halt" was specified as a boot flag, obey. */
331	if (boothowto & RB_HALT)
332		howto |= RB_HALT;
333
334	boothowto = howto;
335	if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
336		waittime = 0;
337		vfs_shutdown();
338	}
339
340	splhigh();
341
342	if (howto & RB_DUMP)
343		dumpsys();
344
345haltsys:
346	doshutdownhooks();
347
348	pmf_system_shutdown(boothowto);
349
350	if (howto & RB_HALT) {
351		printf("\n");
352		printf("The operating system has halted.\n");
353		printf("Please press any key to reboot.\n\n");
354		cnpollc(1);	/* For proper keyboard command handling */
355		cngetc();
356		cnpollc(0);
357	}
358
359	printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
360	yamon_exit(boothowto);
361	printf("Oops, back from yamon_exit()\n\nResetting...");
362
363	REGVAL(MALTA_SOFTRES) = MALTA_GORESET;
364
365	/*
366	 * Need a small delay here, otherwise we see the first few characters of
367	 * the warning below.
368	 */
369	delay(80000);
370
371	printf("WARNING: reset failed!\nSpinning...");
372
373	for (;;)
374		/* spin forever */ ;	/* XXX */
375}
376