machdep.c revision 1.11 
1/*	$NetBSD: machdep.c,v 1.11 2011/06/20 07:18:06 matt Exp $	*/
2
3/*
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Lennart Augustsson (lennart@augustsson.net) at Sandburst Corp.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
34 * Copyright (C) 1995, 1996 TooLs GmbH.
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 *    notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 *    notice, this list of conditions and the following disclaimer in the
44 *    documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 *    must display the following acknowledgement:
47 *	This product includes software developed by TooLs GmbH.
48 * 4. The name of TooLs GmbH may not be used to endorse or promote products
49 *    derived from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
54 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
57 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
58 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
59 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
60 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 */
62
63#include <sys/cdefs.h>
64__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.11 2011/06/20 07:18:06 matt Exp $");
65
66#include "opt_compat_netbsd.h"
67#include "opt_ddb.h"
68#include "opt_ddbparam.h"
69#include "opt_inet.h"
70#include "opt_ccitt.h"
71#include "opt_iso.h"
72#include "opt_ns.h"
73#include "opt_ipkdb.h"
74
75#include <sys/param.h>
76#include <sys/buf.h>
77#include <sys/bus.h>
78#include <sys/conf.h>
79#include <sys/device.h>
80#include <sys/exec.h>
81#include <sys/extent.h>
82#include <sys/intr.h>
83#include <sys/kernel.h>
84#include <sys/kgdb.h>
85#include <sys/ksyms.h>
86#include <sys/malloc.h>
87#include <sys/mbuf.h>
88#include <sys/mount.h>
89#include <sys/msgbuf.h>
90#include <sys/proc.h>
91#include <sys/reboot.h>
92#include <sys/syscallargs.h>
93#include <sys/sysctl.h>
94#include <sys/syslog.h>
95#include <sys/systm.h>
96
97#include <uvm/uvm_extern.h>
98
99#include <machine/powerpc.h>
100#include <machine/pmppc.h>
101
102#include <powerpc/db_machdep.h>
103#include <powerpc/pio.h>
104#include <powerpc/pmap.h>
105#include <powerpc/trap.h>
106
107#include <powerpc/oea/bat.h>
108#include <powerpc/pic/picvar.h>
109
110#include <ddb/db_extern.h>
111
112#include <dev/cons.h>
113
114#include <dev/ic/cpc700reg.h>
115#include <dev/ic/cpc700uic.h>
116
117#include "com.h"
118#if (NCOM > 0)
119#include <sys/termios.h>
120#include <dev/ic/comreg.h>
121#include <dev/ic/comvar.h>
122#endif
123
124#include "ksyms.h"
125
126struct powerpc_bus_space pmppc_mem_tag = {
127	_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
128	0, 0, 0xffffffff,
129	NULL,
130};
131struct powerpc_bus_space pmppc_pci_io_tag = {
132	_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
133	0, CPC_PCI_IO_BASE, 0xffffffff,
134	NULL,
135};
136
137static char ex_storage[1][EXTENT_FIXED_STORAGE_SIZE(8)]
138    __attribute__((aligned(8)));
139
140
141#ifdef KGDB
142char kgdb_devname[] = KGDB_DEVNAME;
143int comkgdbaddr = KGDB_DEVADDR;
144int comkgdbrate = KGDB_DEVRATE;
145
146#ifndef KGDB_DEVMODE
147#define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
148#endif
149int comkgdbmode = KGDB_DEVMODE;
150
151void kgdb_port_init(void);
152#endif /* KGDB */
153
154/*
155 * Global variables used here and there
156 */
157struct mem_region physmemr[2], availmemr[2];
158
159struct a_config a_config;
160
161void initppc(u_int, u_int, u_int, void *); /* Called from locore */
162void pmppc_setup(void);
163void setleds(int leds);
164
165void
166initppc(u_int startkernel, u_int endkernel, u_int args, void *btinfo)
167{
168	extern void consinit(void);
169	extern u_long ticks_per_sec;
170	extern unsigned char edata[], end[];
171
172	memset(&edata, 0, end - edata); /* clear BSS */
173
174	pmppc_setup();
175
176	physmemr[0].start = 0;
177	physmemr[0].size = a_config.a_mem_size;
178	physmemr[1].size = 0;
179	availmemr[0].start = (endkernel + PGOFSET) & ~PGOFSET;
180	availmemr[0].size = a_config.a_mem_size - availmemr[0].start;
181	availmemr[1].size = 0;
182
183#ifdef BOOTHOWTO
184	/*
185	 * boothowto
186	 */
187	boothowto = BOOTHOWTO;
188#endif
189
190	if (bus_space_init(&pmppc_mem_tag, "iomem",
191			   ex_storage[0], sizeof(ex_storage[0])))
192		panic("bus_space_init failed");
193
194	/*
195	 * Initialize the BAT registers
196	 */
197	oea_batinit(
198	    PMPPC_FLASH_BASE, BAT_BL_256M, /* flash (etc) memory 256M area */
199	    CPC_PCI_MEM_BASE, BAT_BL_256M, /* PCI memory 256M area */
200	    CPC_PCI_IO_BASE,  BAT_BL_128M, /* PCI I/O 128M area */
201	    0);
202
203	/*
204	 * Set up trap vectors
205	 */
206	oea_init(NULL);
207
208	/*
209	 * Get CPU clock
210	 */
211	ticks_per_sec = a_config.a_bus_freq;
212	ticks_per_sec /= 4;	/* 4 cycles per DEC tick */
213	cpu_timebase = ticks_per_sec;
214
215	/*
216	 * Set up console.
217	 */
218	consinit();		/* XXX should not be here */
219
220	printf("console set up\n");
221
222        /*
223	 * Set the page size.
224	 */
225	uvm_setpagesize();
226
227	/*
228	 * Initialize pmap module.
229	 */
230	pmap_bootstrap(startkernel, endkernel);
231
232#ifdef IPKDB
233	/*
234	 * Now trap to IPKDB
235	 */
236	ipkdb_init();
237	if (boothowto & RB_KDB)
238		ipkdb_connect(0);
239#endif
240#ifdef KGDB
241	kgdb_port_init();
242	if (boothowto & RB_KDB) {
243		kgdb_debug_init = 1;
244		kgdb_connect(1);
245	}
246#endif
247}
248
249void
250mem_regions(struct mem_region **mem, struct mem_region **avail)
251{
252	*mem = physmemr;
253	*avail = availmemr;
254}
255
256/*
257 * Machine dependent startup code.
258 */
259void
260cpu_startup(void)
261{
262
263	oea_startup(NULL);
264
265	/*
266	 * Now that we have VM, malloc()s are OK in bus_space.
267	 */
268	bus_space_mallocok();
269
270	/* Set up the PCI bus tag. */
271	if (bus_space_init(&pmppc_pci_io_tag, "pcimem", NULL, 0))
272		panic("bus_space_init pci failed");
273
274	/* Set up interrupt controller */
275	cpc700_init_intr(&pmppc_mem_tag, CPC_UIC_BASE,
276	    CPC_INTR_MASK(PMPPC_I_ETH_INT), 0);
277
278	pic_init();
279	(void)setup_cpc700();
280	oea_install_extint(pic_ext_intr);
281
282#if 0
283/* XXX doesn't seem to be needed anymore */
284	/*
285	 * Now allow hardware interrupts.
286	 */
287	__asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0"
288	    : "=r"(msr) : "K"(PSL_EE));
289#endif
290}
291
292/*
293 * consinit
294 * Initialize system console.
295 */
296void
297consinit(void)
298{
299	static int initted;
300#if (NCOM > 0)
301	bus_space_tag_t tag;
302#endif
303
304	if (initted)
305		return;
306	initted = 1;
307
308#if (NCOM > 0)
309	tag = &pmppc_mem_tag;
310
311	if(comcnattach(tag, CPC_COM0, 9600, CPC_COM_SPEED(a_config.a_bus_freq),
312	    COM_TYPE_NORMAL,
313            ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8)))
314		panic("can't init serial console");
315	else
316		return;
317#endif
318
319	panic("console device missing -- serial console not in kernel");
320	/* Of course, this is moot if there is no console... */
321}
322
323#ifdef KGDB
324void
325kgdb_port_init(void)
326{
327#if (NCOM > 0)
328	if(!strcmp(kgdb_devname, "com")) {
329		bus_space_tag_t tag = &pmppc_mem_tag;
330		com_kgdb_attach(tag, comkgdbaddr, comkgdbrate,
331				CPC_COM_SPEED(a_config.a_bus_freq),
332				COM_TYPE_NORMAL, comkgdbmode);
333	}
334#endif
335}
336#endif
337
338/*
339 * Halt or reboot the machine after syncing/dumping according to howto.
340 */
341void
342cpu_reboot(int howto, char *what)
343{
344	static int syncing;
345	static char str[256];
346	char *ap = str, *ap1 = ap;
347	extern void disable_intr(void);
348
349	boothowto = howto;
350	if (!cold && !(howto & RB_NOSYNC) && !syncing) {
351		syncing = 1;
352		vfs_shutdown();		/* sync */
353		resettodr();		/* set wall clock */
354	}
355	splhigh();
356	if (howto & RB_HALT) {
357		doshutdownhooks();
358		pmf_system_shutdown(boothowto);
359		printf("halted\n\n");
360		while(1);
361	}
362	if (!cold && (howto & RB_DUMP))
363		oea_dumpsys();
364	doshutdownhooks();
365
366	pmf_system_shutdown(boothowto);
367	printf("rebooting\n\n");
368	if (what && *what) {
369		if (strlen(what) > sizeof str - 5)
370			printf("boot string too large, ignored\n");
371		else {
372			strcpy(str, what);
373			ap1 = ap = str + strlen(str);
374			*ap++ = ' ';
375		}
376	}
377	*ap++ = '-';
378	if (howto & RB_SINGLE)
379		*ap++ = 's';
380	if (howto & RB_KDB)
381		*ap++ = 'd';
382	*ap++ = 0;
383	if (ap[-2] == '-')
384		*ap1 = 0;
385
386	disable_intr();
387
388        /* Write the two byte reset sequence to the reset register. */
389	out8(PMPPC_RESET, PMPPC_RESET_SEQ_STEP1);
390	out8(PMPPC_RESET, PMPPC_RESET_SEQ_STEP2);
391
392	while (1);
393}
394
395void
396setleds(int leds)
397{
398	out8(PMPPC_LEDS, leds);
399}
400
401void
402pmppc_setup(void)
403{
404	uint config0, config1;
405
406	config0 = in8(PMPPC_CONFIG0);
407	config1 = in8(PMPPC_CONFIG1);
408
409	/* from page 2-8 in the Artesyn User's manual */
410	a_config.a_boot_device = config1 & 0x80 ? A_BOOT_FLASH : A_BOOT_ROM;
411	a_config.a_has_ecc = (config1 & 0x40) != 0;
412	switch (config1 & 0x30) {
413	case 0x00: a_config.a_mem_size = 32 * 1024 * 1024; break;
414	case 0x10: a_config.a_mem_size = 64 * 1024 * 1024; break;
415	case 0x20: a_config.a_mem_size = 128 * 1024 * 1024; break;
416	case 0x30: a_config.a_mem_size = 256 * 1024 * 1024; break;
417	}
418	a_config.a_l2_cache = (config1 >> 2) & 3;
419	switch (config1 & 0x03) {
420	case 0x00: a_config.a_bus_freq = 66666666; break;
421	case 0x01: a_config.a_bus_freq = 83333333; break;
422	case 0x02: a_config.a_bus_freq = 100000000; break;
423	case 0x03: a_config.a_bus_freq = 0; break; /* XXX */
424	}
425	a_config.a_is_monarch = (config0 & 0x80) == 0;
426	a_config.a_has_eth = (config0 & 0x20) != 0;
427	a_config.a_has_rtc = (config0 & 0x10) == 0;
428	switch (config0 & 0x0c) {
429	case 0x00: a_config.a_flash_size = 256 * 1024 * 1024; break;
430	case 0x04: a_config.a_flash_size = 128 * 1024 * 1024; break;
431	case 0x08: a_config.a_flash_size = 64 * 1024 * 1024; break;
432	case 0x0c: a_config.a_flash_size = 32 * 1024 * 1024; break;
433	}
434	switch (config0 & 0x03) {
435	case 0x00: a_config.a_flash_width = 64; break;
436	case 0x01: a_config.a_flash_width = 32; break;
437	case 0x02: a_config.a_flash_width = 16; break;
438	case 0x03: a_config.a_flash_width = 0; break;
439	}
440}
441