machdep.c revision 1.6 
1/*	$NetBSD: machdep.c,v 1.6 2008/11/30 18:21:33 martin 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 1.6 2008/11/30 18:21:33 martin 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/conf.h>
78#include <sys/device.h>
79#include <sys/exec.h>
80#include <sys/extent.h>
81#include <sys/kernel.h>
82#include <sys/kgdb.h>
83#include <sys/malloc.h>
84#include <sys/mbuf.h>
85#include <sys/mount.h>
86#include <sys/msgbuf.h>
87#include <sys/proc.h>
88#include <sys/reboot.h>
89#include <sys/syscallargs.h>
90#include <sys/syslog.h>
91#include <sys/sysctl.h>
92#include <sys/systm.h>
93#include <sys/user.h>
94#include <sys/ksyms.h>
95
96#include <uvm/uvm.h>
97#include <uvm/uvm_extern.h>
98
99#include <net/netisr.h>
100
101#include <machine/bus.h>
102#include <machine/db_machdep.h>
103#include <machine/intr.h>
104#include <machine/pio.h>
105#include <machine/pmap.h>
106#include <machine/powerpc.h>
107#include <machine/trap.h>
108#include <machine/pmppc.h>
109
110#include <powerpc/oea/bat.h>
111#include <arch/powerpc/pic/picvar.h>
112
113#include <ddb/db_extern.h>
114
115#include <dev/cons.h>
116
117#include <dev/ic/cpc700reg.h>
118#include <dev/ic/cpc700uic.h>
119
120#include "com.h"
121#if (NCOM > 0)
122#include <sys/termios.h>
123#include <dev/ic/comreg.h>
124#include <dev/ic/comvar.h>
125#endif
126
127#include "ksyms.h"
128
129struct powerpc_bus_space pmppc_mem_tag = {
130	_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
131	0, 0, 0xffffffff,
132	NULL,
133};
134struct powerpc_bus_space pmppc_pci_io_tag = {
135	_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
136	0, CPC_PCI_IO_BASE, 0xffffffff,
137	NULL,
138};
139
140static char ex_storage[1][EXTENT_FIXED_STORAGE_SIZE(8)]
141    __attribute__((aligned(8)));
142
143
144#ifdef KGDB
145char kgdb_devname[] = KGDB_DEVNAME;
146int comkgdbaddr = KGDB_DEVADDR;
147int comkgdbrate = KGDB_DEVRATE;
148
149#ifndef KGDB_DEVMODE
150#define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
151#endif
152int comkgdbmode = KGDB_DEVMODE;
153
154void kgdb_port_init(void);
155#endif /* KGDB */
156
157/*
158 * Global variables used here and there
159 */
160struct mem_region physmemr[2], availmemr[2];
161
162struct a_config a_config;
163
164void initppc(u_int, u_int, u_int, void *); /* Called from locore */
165void pmppc_setup(void);
166void setleds(int leds);
167
168/*
169 * Force cpu_info to be in the data segment to avoid the
170 * memset() blowing away the data set up by locore.S.
171 */
172#if 0
173 /* this is defined in powerpc/oea/cpu_subr.c, I don't understand the above
174  * comment however.
175  */
176struct cpu_info cpu_info[1] = { { .ci_curlwp = &lwp0, }, };
177#endif
178
179void
180initppc(u_int startkernel, u_int endkernel, u_int args, void *btinfo)
181{
182	extern void consinit(void);
183	extern u_long ticks_per_sec;
184	extern unsigned char edata[], end[];
185
186	memset(&edata, 0, end - edata); /* clear BSS */
187
188	pmppc_setup();
189
190	physmemr[0].start = 0;
191	physmemr[0].size = a_config.a_mem_size;
192	physmemr[1].size = 0;
193	availmemr[0].start = (endkernel + PGOFSET) & ~PGOFSET;
194	availmemr[0].size = a_config.a_mem_size - availmemr[0].start;
195	availmemr[1].size = 0;
196
197#ifdef BOOTHOWTO
198	/*
199	 * boothowto
200	 */
201	boothowto = BOOTHOWTO;
202#endif
203
204	if (bus_space_init(&pmppc_mem_tag, "iomem",
205			   ex_storage[0], sizeof(ex_storage[0])))
206		panic("bus_space_init failed");
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	cpu_initclocks();
215
216	/*
217	 * Initialize the BAT registers
218	 */
219	oea_batinit(
220	    PMPPC_FLASH_BASE, BAT_BL_256M, /* flash (etc) memory 256M area */
221	    CPC_PCI_MEM_BASE, BAT_BL_256M, /* PCI memory 256M area */
222	    CPC_PCI_IO_BASE,  BAT_BL_128M, /* PCI I/O 128M area */
223	    0);
224
225	/*
226	 * Set up trap vectors
227	 */
228	oea_init(NULL);
229
230	/*
231	 * Set up console.
232	 */
233	consinit();		/* XXX should not be here */
234
235	printf("console set up\n");
236
237        /*
238	 * Set the page size.
239	 */
240	uvm_setpagesize();
241
242	/*
243	 * Initialize pmap module.
244	 */
245	pmap_bootstrap(startkernel, endkernel);
246
247#ifdef IPKDB
248	/*
249	 * Now trap to IPKDB
250	 */
251	ipkdb_init();
252	if (boothowto & RB_KDB)
253		ipkdb_connect(0);
254#endif
255#ifdef KGDB
256	kgdb_port_init();
257	if (boothowto & RB_KDB) {
258		kgdb_debug_init = 1;
259		kgdb_connect(1);
260	}
261#endif
262}
263
264void
265mem_regions(struct mem_region **mem, struct mem_region **avail)
266{
267	*mem = physmemr;
268	*avail = availmemr;
269}
270
271/*
272 * Machine dependent startup code.
273 */
274void
275cpu_startup()
276{
277
278	oea_startup(NULL);
279
280	/*
281	 * Now that we have VM, malloc()s are OK in bus_space.
282	 */
283	bus_space_mallocok();
284
285	/* Set up the PCI bus tag. */
286	if (bus_space_init(&pmppc_pci_io_tag, "pcimem", NULL, 0))
287		panic("bus_space_init pci failed");
288
289	/* Set up interrupt controller */
290	cpc700_init_intr(&pmppc_mem_tag, CPC_UIC_BASE,
291	    CPC_INTR_MASK(PMPPC_I_ETH_INT), 0);
292
293	pic_init();
294	(void)setup_cpc700();
295	oea_install_extint(pic_ext_intr);
296
297#if 0
298/* XXX doesn't seem to be needed anymore */
299	/*
300	 * Now allow hardware interrupts.
301	 */
302	__asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0"
303	    : "=r"(msr) : "K"(PSL_EE));
304#endif
305}
306
307/*
308 * consinit
309 * Initialize system console.
310 */
311void
312consinit(void)
313{
314	static int initted;
315#if (NCOM > 0)
316	bus_space_tag_t tag;
317#endif
318
319	if (initted)
320		return;
321	initted = 1;
322
323#if (NCOM > 0)
324	tag = &pmppc_mem_tag;
325
326	if(comcnattach(tag, CPC_COM0, 9600, CPC_COM_SPEED(a_config.a_bus_freq),
327	    COM_TYPE_NORMAL,
328            ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8)))
329		panic("can't init serial console");
330	else
331		return;
332#endif
333
334	panic("console device missing -- serial console not in kernel");
335	/* Of course, this is moot if there is no console... */
336}
337
338#ifdef KGDB
339void
340kgdb_port_init(void)
341{
342#if (NCOM > 0)
343	if(!strcmp(kgdb_devname, "com")) {
344		bus_space_tag_t tag = &pmppc_mem_tag;
345		com_kgdb_attach(tag, comkgdbaddr, comkgdbrate,
346				CPC_COM_SPEED(a_config.a_bus_freq),
347				COM_TYPE_NORMAL, comkgdbmode);
348	}
349#endif
350}
351#endif
352
353/*
354 * Halt or reboot the machine after syncing/dumping according to howto.
355 */
356void
357cpu_reboot(int howto, char *what)
358{
359	static int syncing;
360	static char str[256];
361	char *ap = str, *ap1 = ap;
362	extern void disable_intr(void);
363
364	boothowto = howto;
365	if (!cold && !(howto & RB_NOSYNC) && !syncing) {
366		syncing = 1;
367		vfs_shutdown();		/* sync */
368		resettodr();		/* set wall clock */
369	}
370	splhigh();
371	if (howto & RB_HALT) {
372		doshutdownhooks();
373		pmf_system_shutdown(boothowto);
374		printf("halted\n\n");
375		while(1);
376	}
377	if (!cold && (howto & RB_DUMP))
378		oea_dumpsys();
379	doshutdownhooks();
380
381	pmf_system_shutdown(boothowto);
382	printf("rebooting\n\n");
383	if (what && *what) {
384		if (strlen(what) > sizeof str - 5)
385			printf("boot string too large, ignored\n");
386		else {
387			strcpy(str, what);
388			ap1 = ap = str + strlen(str);
389			*ap++ = ' ';
390		}
391	}
392	*ap++ = '-';
393	if (howto & RB_SINGLE)
394		*ap++ = 's';
395	if (howto & RB_KDB)
396		*ap++ = 'd';
397	*ap++ = 0;
398	if (ap[-2] == '-')
399		*ap1 = 0;
400
401	disable_intr();
402
403        /* Write the two byte reset sequence to the reset register. */
404	out8(PMPPC_RESET, PMPPC_RESET_SEQ_STEP1);
405	out8(PMPPC_RESET, PMPPC_RESET_SEQ_STEP2);
406
407	while (1);
408}
409
410void
411setleds(int leds)
412{
413	out8(PMPPC_LEDS, leds);
414}
415
416void
417pmppc_setup(void)
418{
419	uint config0, config1;
420
421	config0 = in8(PMPPC_CONFIG0);
422	config1 = in8(PMPPC_CONFIG1);
423
424	/* from page 2-8 in the Artesyn User's manual */
425	a_config.a_boot_device = config1 & 0x80 ? A_BOOT_FLASH : A_BOOT_ROM;
426	a_config.a_has_ecc = (config1 & 0x40) != 0;
427	switch (config1 & 0x30) {
428	case 0x00: a_config.a_mem_size = 32 * 1024 * 1024; break;
429	case 0x10: a_config.a_mem_size = 64 * 1024 * 1024; break;
430	case 0x20: a_config.a_mem_size = 128 * 1024 * 1024; break;
431	case 0x30: a_config.a_mem_size = 256 * 1024 * 1024; break;
432	}
433	a_config.a_l2_cache = (config1 >> 2) & 3;
434	switch (config1 & 0x03) {
435	case 0x00: a_config.a_bus_freq = 66666666; break;
436	case 0x01: a_config.a_bus_freq = 83333333; break;
437	case 0x02: a_config.a_bus_freq = 100000000; break;
438	case 0x03: a_config.a_bus_freq = 0; break; /* XXX */
439	}
440	a_config.a_is_monarch = (config0 & 0x80) == 0;
441	a_config.a_has_eth = (config0 & 0x20) != 0;
442	a_config.a_has_rtc = (config0 & 0x10) == 0;
443	switch (config0 & 0x0c) {
444	case 0x00: a_config.a_flash_size = 256 * 1024 * 1024; break;
445	case 0x04: a_config.a_flash_size = 128 * 1024 * 1024; break;
446	case 0x08: a_config.a_flash_size = 64 * 1024 * 1024; break;
447	case 0x0c: a_config.a_flash_size = 32 * 1024 * 1024; break;
448	}
449	switch (config0 & 0x03) {
450	case 0x00: a_config.a_flash_width = 64; break;
451	case 0x01: a_config.a_flash_width = 32; break;
452	case 0x02: a_config.a_flash_width = 16; break;
453	case 0x03: a_config.a_flash_width = 0; break;
454	}
455}
456