1 /* $NetBSD: ibm4xx_machdep.c,v 1.39 2024/03/05 14:15:34 thorpej Exp $ */
2 /* Original: ibm40x_machdep.c,v 1.3 2005/01/17 17:19:36 shige Exp $ */
3
4 /*
5 * Copyright 2001, 2002 Wasabi Systems, Inc.
6 * All rights reserved.
7 *
8 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed for the NetBSD Project by
21 * Wasabi Systems, Inc.
22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23 * or promote products derived from this software without specific prior
24 * written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 /*
40 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
41 * Copyright (C) 1995, 1996 TooLs GmbH.
42 * All rights reserved.
43 *
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
46 * are met:
47 * 1. Redistributions of source code must retain the above copyright
48 * notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 * notice, this list of conditions and the following disclaimer in the
51 * documentation and/or other materials provided with the distribution.
52 * 3. All advertising materials mentioning features or use of this software
53 * must display the following acknowledgement:
54 * This product includes software developed by TooLs GmbH.
55 * 4. The name of TooLs GmbH may not be used to endorse or promote products
56 * derived from this software without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
62 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
63 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
64 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
65 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
66 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
67 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
68 */
69
70 #include <sys/cdefs.h>
71 __KERNEL_RCSID(0, "$NetBSD: ibm4xx_machdep.c,v 1.39 2024/03/05 14:15:34 thorpej Exp $");
72
73 #include "ksyms.h"
74
75 #ifdef _KERNEL_OPT
76 #include "opt_ddb.h"
77 #include "opt_kgdb.h"
78 #include "opt_modular.h"
79 #endif
80
81 #include <sys/param.h>
82 #include <sys/cpu.h>
83 #include <sys/ksyms.h>
84 #include <sys/mount.h>
85 #include <sys/msgbuf.h>
86 #include <sys/pmf.h>
87 #include <sys/proc.h>
88 #include <sys/reboot.h>
89 #include <sys/systm.h>
90
91 #include <dev/cons.h>
92
93 #include <uvm/uvm_extern.h>
94
95 #if defined(DDB)
96 #include <machine/db_machdep.h>
97 #include <ddb/db_extern.h>
98 #endif
99
100 #if defined(KGDB)
101 #include <sys/kgdb.h>
102 #endif
103
104 #include <machine/powerpc.h>
105 #include <machine/trap.h>
106
107 #include <powerpc/pcb.h>
108 #include <powerpc/spr.h>
109
110 #include <powerpc/ibm4xx/cpu.h>
111 #include <powerpc/ibm4xx/spr.h>
112
113 /*
114 * Global variables used here and there
115 */
116 paddr_t msgbuf_paddr;
117 vaddr_t msgbuf_vaddr;
118 char msgbuf[MSGBUFSIZE];
119
120 #if NKSYMS || defined(DDB) || defined(MODULAR)
121 void *startsym, *endsym;
122 #endif
123
124 #ifdef MODULAR
125 register_t cpu_psluserset = PSL_USERSET;
126 register_t cpu_pslusermod = PSL_USERMOD;
127 register_t cpu_pslusermask = PSL_USERMASK;
128 #endif
129
130 /*
131 * Trap vectors
132 */
133 extern const uint32_t defaulttrap[], defaultsize;
134 extern const uint32_t sctrap[], scsize;
135 extern const uint32_t accesstrap[], accesssize;
136 extern const uint32_t criticaltrap[], criticalsize;
137 extern const uint32_t tlbimiss4xx[], tlbim4size;
138 extern const uint32_t tlbdmiss4xx[], tlbdm4size;
139 extern const uint32_t pitfitwdog[], pitfitwdogsize;
140 extern const uint32_t errata51handler[], errata51size;
141 #if defined(DDB)
142 extern const uint32_t ddblow[], ddbsize;
143 #endif
144 static const struct exc_info trap_table[] = {
145 { EXC_SC, sctrap, (uintptr_t)&scsize },
146 { EXC_ALI, accesstrap, (uintptr_t)&accesssize },
147 { EXC_DSI, accesstrap, (uintptr_t)&accesssize },
148 { EXC_MCHK, criticaltrap, (uintptr_t)&criticalsize },
149 { EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size },
150 { EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size },
151 { EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize },
152 { EXC_DEBUG, criticaltrap, (uintptr_t)&criticalsize },
153 { (EXC_DTMISS|EXC_ALI),
154 errata51handler, (uintptr_t)&errata51size },
155 #if defined(DDB)
156 { EXC_PGM, ddblow, (uintptr_t)&ddbsize },
157 #else
158 { EXC_PGM, accesstrap, (uintptr_t)&accesssize },
159 #endif
160 };
161
162 void
cpu_reboot(int howto,char * what)163 cpu_reboot(int howto, char *what)
164 {
165 static int syncing;
166 static char str[256];
167 char *ap = str, *ap1 = ap;
168
169 boothowto = howto;
170 if (!cold && !(howto & RB_NOSYNC) && !syncing) {
171 syncing = 1;
172 vfs_shutdown(); /* sync */
173 }
174
175 splhigh();
176
177 if (!cold && (howto & RB_DUMP))
178 ibm4xx_dumpsys();
179
180 doshutdownhooks();
181
182 pmf_system_shutdown(boothowto);
183
184 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
185 /* Power off here if we know how... */
186 }
187
188 if (howto & RB_HALT) {
189 printf("The operating system has halted.\n"
190 "Press any key to reboot.\n\n");
191
192 cnpollc(1);
193 cngetc();
194 cnpollc(0);
195 }
196
197 printf("rebooting...\n\n");
198 if (what && *what) {
199 if (strlen(what) > sizeof(str) - 5)
200 printf("boot string too large, ignored\n");
201 else {
202 strcpy(str, what);
203 ap1 = ap = str + strlen(str);
204 *ap++ = ' ';
205 }
206 }
207 *ap++ = '-';
208 if (howto & RB_SINGLE)
209 *ap++ = 's';
210 if (howto & RB_KDB)
211 *ap++ = 'd';
212 *ap++ = '\0';
213 if (ap[-2] == '-')
214 *ap1 = '\0';
215
216 /* flush cache for msgbuf */
217 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
218
219 ppc4xx_reset();
220
221 printf("ppc4xx_reset() failed!\n");
222
223 for (;;) {
224 #if defined(DDB)
225 Debugger();
226 #elif defined(KGDB)
227 kgdb_connect(1);
228 #else
229 continue;
230 #endif
231 }
232 }
233
234 /*
235 * Install a trap vector. We cannot use memcpy because the
236 * destination may be zero.
237 */
238 static void
trap_copy(const uint32_t * src,vaddr_t dest,size_t len)239 trap_copy(const uint32_t *src, vaddr_t dest, size_t len)
240 {
241 uint32_t *dest_p = (void *)dest;
242
243 while (len > 0) {
244 *dest_p++ = *src++;
245 len -= sizeof(uint32_t);
246 }
247 }
248
249 /*
250 * ibm4xx_init:
251 */
252 void
ibm4xx_init(vaddr_t startkernel,vaddr_t endkernel,void (* handler)(void))253 ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void))
254 {
255 /* Initialize cache info for memcpy, etc. */
256 cpu_probe_cache();
257
258 /*
259 * Initialize current pcb and pmap pointers.
260 */
261 KASSERT(curcpu() == &cpu_info[0]);
262 KASSERT(lwp0.l_cpu == curcpu());
263 KASSERT(curlwp == &lwp0);
264
265 curpcb = lwp_getpcb(curlwp);
266 memset(curpcb, 0, sizeof(struct pcb));
267
268 curpcb->pcb_pm = pmap_kernel();
269
270 for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) {
271 trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize);
272 }
273
274 for (size_t i = 0; i < __arraycount(trap_table); i++) {
275 KASSERT(trap_table[i].exc_size <= 0x100);
276 trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector,
277 trap_table[i].exc_size);
278 }
279
280 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
281
282 mtspr(SPR_EVPR, 0); /* Set Exception vector base */
283
284 /* Handle trap instruction as PGM exception */
285 mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE);
286
287 /*
288 * external interrupt handler install
289 */
290 if (handler)
291 ibm4xx_install_extint(handler);
292
293 /*
294 * Now enable translation (and machine checks/recoverable interrupts).
295 */
296 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync"
297 : : "r" (0), "K" (PSL_IR|PSL_DR));
298 /* XXXX PSL_ME - With ME set kernel gets stuck... */
299
300 /*
301 * turn on console after enable translation
302 */
303 consinit();
304
305 uvm_md_init();
306
307 /*
308 * Initialize pmap module.
309 */
310 pmap_bootstrap(startkernel, endkernel);
311
312 /*
313 * Let's take all the indirect calls via our stubs and patch
314 * them to be direct calls.
315 */
316 cpu_fixup_stubs();
317
318 #if NKSYMS || defined(DDB) || defined(MODULAR)
319 ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym,
320 startsym, endsym);
321 #endif
322 }
323
324 void
ibm4xx_install_extint(void (* handler)(void))325 ibm4xx_install_extint(void (*handler)(void))
326 {
327 extern int extint, extsize;
328 extern u_long extint_call;
329 u_long offset = (u_long)handler - (u_long)&extint_call;
330 int msr;
331
332 #ifdef DIAGNOSTIC
333 if (offset > 0x1ffffff)
334 panic("install_extint: too far away");
335 #endif
336 __asm volatile ("mfmsr %0; wrteei 0" : "=r" (msr));
337 extint_call = (extint_call & 0xfc000003) | offset;
338 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize);
339 __syncicache((void *)&extint_call, sizeof extint_call);
340 __syncicache((void *)EXC_EXI, (int)&extsize);
341 __asm volatile ("mtmsr %0" :: "r" (msr));
342 }
343
344 /*
345 * ibm4xx_cpu_startup:
346 * Machine dependent startup code.
347 */
348 void
ibm4xx_cpu_startup(const char * model)349 ibm4xx_cpu_startup(const char *model)
350 {
351 vaddr_t minaddr, maxaddr;
352 char pbuf[9];
353
354 KASSERT(curcpu() != NULL);
355 KASSERT(lwp0.l_cpu != NULL);
356 KASSERT(curcpu()->ci_intstk != 0);
357 KASSERT(curcpu()->ci_idepth == -1);
358
359 /*
360 * Initialize error message buffer (at end of core).
361 */
362 #if 0 /* For some reason this fails... --Artem
363 * Besides, do we really have to put it at the end of core?
364 * Let's use static buffer for now
365 */
366 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE),
367 0, UVM_KMF_VAONLY)))
368 panic("startup: no room for message buffer");
369 for (i = 0; i < btoc(MSGBUFSIZE); i++)
370 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE,
371 msgbuf_paddr + i * PAGE_SIZE,
372 VM_PROT_READ|VM_PROT_WRITE, 0);
373 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE));
374 #else
375 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
376 #endif
377
378 printf("%s%s", copyright, version);
379 if (model != NULL)
380 printf("Model: %s\n", model);
381
382 format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
383 printf("total memory = %s\n", pbuf);
384
385 minaddr = 0;
386 /*
387 * Allocate a submap for physio
388 */
389 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
390 VM_PHYS_SIZE, 0, false, NULL);
391
392 /*
393 * No need to allocate an mbuf cluster submap. Mbuf clusters
394 * are allocated via the pool allocator, and we use direct-mapped
395 * pool pages.
396 */
397
398 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false)));
399 printf("avail memory = %s\n", pbuf);
400 }
401
402 /*
403 * ibm4xx_dumpsys:
404 * Crash dump handling.
405 */
406 void
ibm4xx_dumpsys(void)407 ibm4xx_dumpsys(void)
408 {
409
410 printf("dumpsys: TBD\n");
411 }
412