machdep.c revision 1.12 
1/*	$NetBSD: machdep.c,v 1.12 2013/03/01 18:25:39 joerg 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 1.12 2013/03/01 18:25:39 joerg 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_ns.h"
72#include "opt_ipkdb.h"
73
74#include <sys/param.h>
75#include <sys/buf.h>
76#include <sys/bus.h>
77#include <sys/conf.h>
78#include <sys/device.h>
79#include <sys/exec.h>
80#include <sys/extent.h>
81#include <sys/intr.h>
82#include <sys/kernel.h>
83#include <sys/kgdb.h>
84#include <sys/ksyms.h>
85#include <sys/malloc.h>
86#include <sys/mbuf.h>
87#include <sys/mount.h>
88#include <sys/msgbuf.h>
89#include <sys/proc.h>
90#include <sys/reboot.h>
91#include <sys/syscallargs.h>
92#include <sys/sysctl.h>
93#include <sys/syslog.h>
94#include <sys/systm.h>
95
96#include <uvm/uvm_extern.h>
97
98#include <machine/powerpc.h>
99#include <machine/pmppc.h>
100
101#include <powerpc/db_machdep.h>
102#include <powerpc/pio.h>
103#include <powerpc/pmap.h>
104#include <powerpc/trap.h>
105
106#include <powerpc/oea/bat.h>
107#include <powerpc/pic/picvar.h>
108
109#include <ddb/db_extern.h>
110
111#include <dev/cons.h>
112
113#include <dev/ic/cpc700reg.h>
114#include <dev/ic/cpc700uic.h>
115
116#include "com.h"
117#if (NCOM > 0)
118#include <sys/termios.h>
119#include <dev/ic/comreg.h>
120#include <dev/ic/comvar.h>
121#endif
122
123#include "ksyms.h"
124
125struct powerpc_bus_space pmppc_mem_tag = {
126	_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
127	0, 0, 0xffffffff,
128	NULL,
129};
130struct powerpc_bus_space pmppc_pci_io_tag = {
131	_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
132	0, CPC_PCI_IO_BASE, 0xffffffff,
133	NULL,
134};
135
136static char ex_storage[1][EXTENT_FIXED_STORAGE_SIZE(8)]
137    __attribute__((aligned(8)));
138
139
140#ifdef KGDB
141char kgdb_devname[] = KGDB_DEVNAME;
142int comkgdbaddr = KGDB_DEVADDR;
143int comkgdbrate = KGDB_DEVRATE;
144
145#ifndef KGDB_DEVMODE
146#define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
147#endif
148int comkgdbmode = KGDB_DEVMODE;
149
150void kgdb_port_init(void);
151#endif /* KGDB */
152
153/*
154 * Global variables used here and there
155 */
156struct mem_region physmemr[2], availmemr[2];
157
158struct a_config a_config;
159
160void initppc(u_int, u_int, u_int, void *); /* Called from locore */
161void pmppc_setup(void);
162void setleds(int leds);
163
164void
165initppc(u_int startkernel, u_int endkernel, u_int args, void *btinfo)
166{
167	extern void consinit(void);
168	extern u_long ticks_per_sec;
169	extern unsigned char edata[], end[];
170
171	memset(&edata, 0, end - edata); /* clear BSS */
172
173	pmppc_setup();
174
175	physmemr[0].start = 0;
176	physmemr[0].size = a_config.a_mem_size;
177	physmemr[1].size = 0;
178	availmemr[0].start = (endkernel + PGOFSET) & ~PGOFSET;
179	availmemr[0].size = a_config.a_mem_size - availmemr[0].start;
180	availmemr[1].size = 0;
181
182#ifdef BOOTHOWTO
183	/*
184	 * boothowto
185	 */
186	boothowto = BOOTHOWTO;
187#endif
188
189	if (bus_space_init(&pmppc_mem_tag, "iomem",
190			   ex_storage[0], sizeof(ex_storage[0])))
191		panic("bus_space_init failed");
192
193	/*
194	 * Initialize the BAT registers
195	 */
196	oea_batinit(
197	    PMPPC_FLASH_BASE, BAT_BL_256M, /* flash (etc) memory 256M area */
198	    CPC_PCI_MEM_BASE, BAT_BL_256M, /* PCI memory 256M area */
199	    CPC_PCI_IO_BASE,  BAT_BL_128M, /* PCI I/O 128M area */
200	    0);
201
202	/*
203	 * Set up trap vectors
204	 */
205	oea_init(NULL);
206
207	/*
208	 * Get CPU clock
209	 */
210	ticks_per_sec = a_config.a_bus_freq;
211	ticks_per_sec /= 4;	/* 4 cycles per DEC tick */
212	cpu_timebase = ticks_per_sec;
213
214	/*
215	 * Set up console.
216	 */
217	consinit();		/* XXX should not be here */
218
219	printf("console set up\n");
220
221        /*
222	 * Set the page size.
223	 */
224	uvm_setpagesize();
225
226	/*
227	 * Initialize pmap module.
228	 */
229	pmap_bootstrap(startkernel, endkernel);
230
231#ifdef IPKDB
232	/*
233	 * Now trap to IPKDB
234	 */
235	ipkdb_init();
236	if (boothowto & RB_KDB)
237		ipkdb_connect(0);
238#endif
239#ifdef KGDB
240	kgdb_port_init();
241	if (boothowto & RB_KDB) {
242		kgdb_debug_init = 1;
243		kgdb_connect(1);
244	}
245#endif
246}
247
248void
249mem_regions(struct mem_region **mem, struct mem_region **avail)
250{
251	*mem = physmemr;
252	*avail = availmemr;
253}
254
255/*
256 * Machine dependent startup code.
257 */
258void
259cpu_startup(void)
260{
261
262	oea_startup(NULL);
263
264	/*
265	 * Now that we have VM, malloc()s are OK in bus_space.
266	 */
267	bus_space_mallocok();
268
269	/* Set up the PCI bus tag. */
270	if (bus_space_init(&pmppc_pci_io_tag, "pcimem", NULL, 0))
271		panic("bus_space_init pci failed");
272
273	/* Set up interrupt controller */
274	cpc700_init_intr(&pmppc_mem_tag, CPC_UIC_BASE,
275	    CPC_INTR_MASK(PMPPC_I_ETH_INT), 0);
276
277	pic_init();
278	(void)setup_cpc700();
279	oea_install_extint(pic_ext_intr);
280
281#if 0
282/* XXX doesn't seem to be needed anymore */
283	/*
284	 * Now allow hardware interrupts.
285	 */
286	__asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0"
287	    : "=r"(msr) : "K"(PSL_EE));
288#endif
289}
290
291/*
292 * consinit
293 * Initialize system console.
294 */
295void
296consinit(void)
297{
298	static int initted;
299#if (NCOM > 0)
300	bus_space_tag_t tag;
301#endif
302
303	if (initted)
304		return;
305	initted = 1;
306
307#if (NCOM > 0)
308	tag = &pmppc_mem_tag;
309
310	if(comcnattach(tag, CPC_COM0, 9600, CPC_COM_SPEED(a_config.a_bus_freq),
311	    COM_TYPE_NORMAL,
312            ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8)))
313		panic("can't init serial console");
314	else
315		return;
316#endif
317
318	panic("console device missing -- serial console not in kernel");
319	/* Of course, this is moot if there is no console... */
320}
321
322#ifdef KGDB
323void
324kgdb_port_init(void)
325{
326#if (NCOM > 0)
327	if(!strcmp(kgdb_devname, "com")) {
328		bus_space_tag_t tag = &pmppc_mem_tag;
329		com_kgdb_attach(tag, comkgdbaddr, comkgdbrate,
330				CPC_COM_SPEED(a_config.a_bus_freq),
331				COM_TYPE_NORMAL, comkgdbmode);
332	}
333#endif
334}
335#endif
336
337/*
338 * Halt or reboot the machine after syncing/dumping according to howto.
339 */
340void
341cpu_reboot(int howto, char *what)
342{
343	static int syncing;
344	static char str[256];
345	char *ap = str, *ap1 = ap;
346	extern void disable_intr(void);
347
348	boothowto = howto;
349	if (!cold && !(howto & RB_NOSYNC) && !syncing) {
350		syncing = 1;
351		vfs_shutdown();		/* sync */
352		resettodr();		/* set wall clock */
353	}
354	splhigh();
355	if (howto & RB_HALT) {
356		doshutdownhooks();
357		pmf_system_shutdown(boothowto);
358		printf("halted\n\n");
359		while(1);
360	}
361	if (!cold && (howto & RB_DUMP))
362		oea_dumpsys();
363	doshutdownhooks();
364
365	pmf_system_shutdown(boothowto);
366	printf("rebooting\n\n");
367	if (what && *what) {
368		if (strlen(what) > sizeof str - 5)
369			printf("boot string too large, ignored\n");
370		else {
371			strcpy(str, what);
372			ap1 = ap = str + strlen(str);
373			*ap++ = ' ';
374		}
375	}
376	*ap++ = '-';
377	if (howto & RB_SINGLE)
378		*ap++ = 's';
379	if (howto & RB_KDB)
380		*ap++ = 'd';
381	*ap++ = 0;
382	if (ap[-2] == '-')
383		*ap1 = 0;
384
385	disable_intr();
386
387        /* Write the two byte reset sequence to the reset register. */
388	out8(PMPPC_RESET, PMPPC_RESET_SEQ_STEP1);
389	out8(PMPPC_RESET, PMPPC_RESET_SEQ_STEP2);
390
391	while (1);
392}
393
394void
395setleds(int leds)
396{
397	out8(PMPPC_LEDS, leds);
398}
399
400void
401pmppc_setup(void)
402{
403	uint config0, config1;
404
405	config0 = in8(PMPPC_CONFIG0);
406	config1 = in8(PMPPC_CONFIG1);
407
408	/* from page 2-8 in the Artesyn User's manual */
409	a_config.a_boot_device = config1 & 0x80 ? A_BOOT_FLASH : A_BOOT_ROM;
410	a_config.a_has_ecc = (config1 & 0x40) != 0;
411	switch (config1 & 0x30) {
412	case 0x00: a_config.a_mem_size = 32 * 1024 * 1024; break;
413	case 0x10: a_config.a_mem_size = 64 * 1024 * 1024; break;
414	case 0x20: a_config.a_mem_size = 128 * 1024 * 1024; break;
415	case 0x30: a_config.a_mem_size = 256 * 1024 * 1024; break;
416	}
417	a_config.a_l2_cache = (config1 >> 2) & 3;
418	switch (config1 & 0x03) {
419	case 0x00: a_config.a_bus_freq = 66666666; break;
420	case 0x01: a_config.a_bus_freq = 83333333; break;
421	case 0x02: a_config.a_bus_freq = 100000000; break;
422	case 0x03: a_config.a_bus_freq = 0; break; /* XXX */
423	}
424	a_config.a_is_monarch = (config0 & 0x80) == 0;
425	a_config.a_has_eth = (config0 & 0x20) != 0;
426	a_config.a_has_rtc = (config0 & 0x10) == 0;
427	switch (config0 & 0x0c) {
428	case 0x00: a_config.a_flash_size = 256 * 1024 * 1024; break;
429	case 0x04: a_config.a_flash_size = 128 * 1024 * 1024; break;
430	case 0x08: a_config.a_flash_size = 64 * 1024 * 1024; break;
431	case 0x0c: a_config.a_flash_size = 32 * 1024 * 1024; break;
432	}
433	switch (config0 & 0x03) {
434	case 0x00: a_config.a_flash_width = 64; break;
435	case 0x01: a_config.a_flash_width = 32; break;
436	case 0x02: a_config.a_flash_width = 16; break;
437	case 0x03: a_config.a_flash_width = 0; break;
438	}
439}
440