xref: /netbsd-src/sys/arch/emips/emips/machdep.c (revision f36002f244a49908fef9cba8789032bdbf48d572)
1 /*	$NetBSD: machdep.c,v 1.20 2024/03/05 14:15:29 thorpej Exp $	*/
2 
3 /*
4  * Copyright (c) 1988 University of Utah.
5  * Copyright (c) 1992, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * This code is derived from software contributed to Berkeley by
9  * the Systems Programming Group of the University of Utah Computer
10  * Science Department, The Mach Operating System project at
11  * Carnegie-Mellon University and Ralph Campbell.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  *    notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions and the following disclaimer in the
20  *    documentation and/or other materials provided with the distribution.
21  * 3. Neither the name of the University nor the names of its contributors
22  *    may be used to endorse or promote products derived from this software
23  *    without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  *	@(#)machdep.c	8.3 (Berkeley) 1/12/94
38  * 	from: Utah Hdr: machdep.c 1.63 91/04/24
39  */
40 
41 #include <sys/cdefs.h>
42 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.20 2024/03/05 14:15:29 thorpej Exp $");
43 
44 #include "opt_ddb.h"
45 
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/extent.h>
49 #include <sys/kernel.h>
50 #include <sys/buf.h>
51 #include <sys/mbuf.h>
52 #include <sys/reboot.h>
53 #include <sys/mount.h>
54 #include <sys/kcore.h>
55 #include <sys/boot_flag.h>
56 #include <sys/ksyms.h>
57 #include <sys/proc.h>
58 #include <sys/device.h>
59 #include <sys/cpu.h>
60 
61 #include <uvm/uvm_extern.h>
62 
63 #include <dev/cons.h>
64 
65 #include <ufs/mfs/mfs_extern.h>		/* mfs_initminiroot() */
66 
67 #include <mips/cache.h>
68 #include <machine/psl.h>
69 #include <machine/autoconf.h>
70 #include <emips/stand/common/prom_iface.h>
71 #include <machine/sysconf.h>
72 #include <machine/bootinfo.h>
73 #include <machine/locore.h>
74 #include <emips/emips/machdep.h>
75 #include <machine/emipsreg.h>
76 
77 #define _EMIPS_BUS_DMA_PRIVATE
78 #include <machine/bus.h>
79 
80 #if NKSYMS || defined(DDB) || defined(MODULAR)
81 #include <machine/db_machdep.h>
82 #include <ddb/db_extern.h>
83 #endif
84 
85 vaddr_t iospace;
86 vsize_t iospace_size = 64 * 1024; /* BUGBUG make it an option? */
87 
88 #include "ksyms.h"
89 
90 /*
91  * Extent map to manage I/O register space.  We allocate storage for
92  * 32 regions in the map.  iomap_ex_malloc_safe will indicate that it's
93  * safe to use malloc() to dynamically allocate region descriptors in
94  * case we run out.
95  */
96 static long iomap_ex_storage[EXTENT_FIXED_STORAGE_SIZE(32) / sizeof(long)];
97 static struct extent *iomap_ex;
98 static int iomap_ex_malloc_safe;
99 
100 /* maps for VM objects */
101 struct vm_map *phys_map = NULL;
102 
103 int		systype;		    /* mother board type */
104 char   *bootinfo = NULL;	/* pointer to bootinfo structure */
105 int		cpuspeed = 30;		/* approx # instr per usec. */
106 intptr_t	physmem_boardmax;	/* {model,SIMM}-specific bound on physmem */
107 int		mem_cluster_cnt;
108 phys_ram_seg_t	mem_clusters[VM_PHYSSEG_MAX];
109 
110 void	mach_init (int, char *[], int, intptr_t, u_int, char *); /* XXX */
111 
112 /* Motherboard or system-specific initialization vector */
113 static void	unimpl_bus_reset(void);
114 static void	unimpl_cons_init(void);
115 static void	unimpl_iointr(uint32_t, vaddr_t, uint32_t);
116 static void	unimpl_intr_establish(device_t, void *, int,
117 		    int (*)(void *, void *), void *);
118 static int	unimpl_memsize(void *);
119 
120 struct platform platform = {
121 	"iobus not set",
122 	unimpl_bus_reset,
123 	unimpl_cons_init,
124 	unimpl_iointr,
125 	unimpl_intr_establish,
126 	unimpl_memsize
127 };
128 
129 extern char *esym;			/* XXX */
130 extern struct consdev promcd;		/* XXX */
131 extern const struct callback *callv;
132 extern const struct callback callvec;
133 
134 /*
135  * Do all the stuff that locore normally does before calling main().
136  * The first 4 arguments are passed by PROM monitor, and remaining two
137  * are built on temporary stack by our boot loader.
138  */
139 void
mach_init(int argc,char * argv[],int code,intptr_t cv,u_int bim,char * bip)140 mach_init(int argc, char *argv[], int code, intptr_t cv, u_int bim, char *bip)
141 {
142 	char *cp;
143 	const char *bootinfo_msg;
144 	u_long first, last;
145 	int i, howtoboot;
146 #if NKSYMS || defined(DDB) || defined(MODULAR)
147 	void *ssym = 0;
148 	struct btinfo_symtab *bi_syms;
149 #endif
150 	void *kernend;
151 	extern char edata[], end[];	/* XXX */
152 
153 	/* Set up bootinfo structure looking at stack. */
154 	if (bim == BOOTINFO_MAGIC) {
155 		struct btinfo_magic *bi_magic;
156 
157 		bootinfo = bip;
158 		bi_magic = lookup_bootinfo(BTINFO_MAGIC);
159 		if (bi_magic == NULL || bi_magic->magic != BOOTINFO_MAGIC)
160 			bootinfo_msg =
161 			    "invalid magic number in bootinfo structure.\n";
162 		else
163 			bootinfo_msg = NULL;
164 	} else
165 		bootinfo_msg = "invalid bootinfo pointer (old bootblocks?)\n";
166 
167 	/*
168 	 * Look at arguments passed to us and compute boothowto.
169 	 * Do it before we decide to keep symbols.
170 	 * NB: "boothowto" is in the BSS.
171 	 */
172 	howtoboot = 0;
173 #ifdef KADB
174 	howtoboot |= RB_KDB;
175 #endif
176 	for (i = 1; i < argc; i++) {
177 		for (cp = argv[i]; *cp; cp++) {
178 			switch (*cp) {
179 
180 #define RB_NOSYMBOLS 0x10000000
181 			case 'e': /* empty the symtable */
182 				howtoboot |= RB_NOSYMBOLS;
183 				break;
184 
185 			case 'n': /* ask for names */
186 				howtoboot |= RB_ASKNAME;
187 				break;
188 
189 			case 'N': /* don't ask for names */
190 				howtoboot &= ~RB_ASKNAME;
191 				break;
192 
193 			default:
194 				BOOT_FLAG(*cp, howtoboot); /* see sys/boot_flag.h */
195 				break;
196 			}
197 		}
198 	}
199 
200 	/* clear the BSS segment */
201 #if NKSYMS || defined(DDB) || defined(MODULAR)
202 	bi_syms = lookup_bootinfo(BTINFO_SYMTAB);
203 
204 	/* Was it a valid bootinfo symtab info? */
205 	if ((bi_syms != NULL) && (!(howtoboot & RB_NOSYMBOLS))) {
206 		ssym = (void *)(intptr_t)bi_syms->ssym;
207 		esym = (void *)(intptr_t)bi_syms->esym;
208 		kernend = (void *)mips_round_page(esym);
209 		memset(edata, 0, end - edata);
210 	} else
211 #endif
212 	{
213 		kernend = (char *)mips_round_page(end);
214 		/* should be done by bootloader? */
215 		memset(edata, 0, (char *)kernend - (char *)edata);
216 	}
217 
218 	/* Initialize callv so we can do PROM output... */
219 	callv = (code == PROM_MAGIC) ? (void *)cv : &callvec;
220 
221 	/* Use PROM console output until we initialize a console driver. */
222 	cn_tab = &promcd;
223 
224 #if 1
225 	if (bootinfo_msg != NULL)
226 		printf(bootinfo_msg);
227 #endif
228 	uvm_md_init();
229 
230 	/*
231 	 * Copy exception-dispatch code down to exception vector.
232 	 * Initialize locore-function vector.
233 	 * Clear out the I and D caches.
234 	 */
235 	mips_vector_init(NULL, false);
236 
237 	/*
238 	 * We know the CPU type now.  Initialize our DMA tags (might
239 	 * need this early, for certain types of console devices!!).
240 	 */
241 	emips_bus_dma_init();
242 
243 	/* Look at argv[0] and compute bootdev */
244 	makebootdev(argv[0]);
245 
246 	boothowto = howtoboot & ~RB_NOSYMBOLS;
247 
248 	/*
249 	 * Check to see if a mini-root was loaded into memory. It resides
250 	 * at the start of the next page just after the end of BSS.
251 	 */
252 	if (boothowto & RB_MINIROOT)
253 		kernend = (char *)kernend
254 		    + round_page(mfs_initminiroot(kernend));
255 
256 #if NKSYMS || defined(DDB) || defined(MODULAR)
257 	/* init symbols if present */
258 	if (esym) {
259 		ksyms_addsyms_elf((char *)esym - (char *)ssym, ssym, esym);
260 	}
261 #endif
262 #ifdef DDB
263 	if (boothowto & RB_KDB)
264 		Debugger();
265 #endif
266 
267 	/*
268 	 * Initialize physmem_boardmax; assume no SIMM-bank limits.
269 	 * Adjust later in model-specific code if necessary.
270 	 */
271 	physmem_boardmax = MIPS_MAX_MEM_ADDR;
272 
273 	/*
274 	 * Determine what model of computer we are running on.
275 	 */
276 	systype = ((prom_systype() >> 16) & 0xff);
277 	if (systype >= nsysinit) {
278 		platform_not_supported();
279 		/* NOTREACHED */
280 	}
281 
282 	/* Machine specific initialization. */
283 	(*sysinit[systype].init)();
284 
285 	/* Find out how much memory is available. */
286 	physmem = (*platform.memsize)(kernend);
287 
288 	/*
289 	 * Load the rest of the available pages into the VM system.
290 	 * NB: The kernel can span multiple segments.
291 	 */
292 	for (i = 0, physmem = 0; i < mem_cluster_cnt; ++i) {
293 		first = mem_clusters[i].start;
294 		if (first < round_page(MIPS_KSEG0_TO_PHYS(kernend)))
295 			first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
296 		last = mem_clusters[i].start + mem_clusters[i].size;
297 		physmem += atop(mem_clusters[i].size);
298 
299 		/* if the kernel spans multiple segments (does on ML40x) */
300 		if (last <= first)
301 			continue;
302 
303 		uvm_page_physload(atop(first), atop(last), atop(first),
304 		    atop(last), VM_FREELIST_DEFAULT);
305 	}
306 
307 	/*
308 	 * Initialize error message buffer (at end of core).
309 	 */
310 	mips_init_msgbuf();
311 
312 	/*
313 	 * Initialize the virtual memory system.
314 	 */
315 	iospace = pmap_limits.virtual_start;
316 	pmap_limits.virtual_start += iospace_size;
317 	pmap_bootstrap();
318 
319 	mips_init_lwp0_uarea();
320 }
321 
322 void
mips_machdep_cache_config(void)323 mips_machdep_cache_config(void)
324 {
325 }
326 
327 void
consinit(void)328 consinit(void)
329 {
330 	/*
331 	 * Init I/O memory extent map. Must be done before cninit()
332 	 * is called; we may want to use iospace in the console routines.
333 	 */
334 	KASSERT(iospace != 0);
335 	iomap_ex = extent_create("iomap", iospace,
336 	    iospace + iospace_size - 1,
337 	    (void *) iomap_ex_storage, sizeof(iomap_ex_storage),
338 	    EX_NOCOALESCE|EX_NOWAIT);
339 
340 	/*
341 	 * Up until now we have kept the TLB disabled,
342 	 * and that allowed the "PROM" to work.
343 	 * Specifically, romputc() and the debugger's getc() functions worked.
344 	 * Now is the last chance we get to turn it on.
345 	 * That means no more console I/O until autoconf() [sigh!], or..
346 	 * The platform-specific code will have to map [1:1 probably]
347 	 * the I/O registers.
348 	 */
349 	register_t s = mips_cp0_status_read();
350 	s &= ~MIPS_SR_TS;
351 	mips_cp0_status_write(s);
352 
353 	(*platform.cons_init)();
354 
355 	/*
356 	 * Do NOT call cninit(); It will clobber cn_tab using constab[]
357 	 * which we do not use
358 	 */
359 }
360 
361 /*
362  * Allocates a virtual range suitable for mapping in physical memory.
363  * Uses resource maps when allocating space, which is allocated from
364  * the IOMAP submap. SIZE is a linear range (NOT vax-pages like the VAX).
365  * If the page requested is bigger than a logical page, space is
366  * allocated from the kernel map instead.
367  */
368 vaddr_t
mips_map_physmem(paddr_t phys,vsize_t size)369 mips_map_physmem(paddr_t phys, vsize_t size)
370 {
371 	vaddr_t addr;
372 	int error;
373 	static int warned = 0;
374 
375 	size += phys & PAGE_MASK;
376 	if (size >= PAGE_SIZE) {
377 		addr = uvm_km_alloc(kernel_map, size, 0, UVM_KMF_VAONLY);
378 		if (addr == 0)
379 			panic("mips_map_physmem: kernel map full");
380 	} else {
381 		error = extent_alloc(iomap_ex, size, PAGE_SIZE, 0,
382 		    EX_FAST | EX_NOWAIT |
383 		    (iomap_ex_malloc_safe ? EX_MALLOCOK : 0), (u_long *)&addr);
384 		if (error) {
385 			if (warned++ == 0) /* Warn only once */
386 				printf("mips_map_physmem: iomap too small");
387 			return 0;
388 		}
389 	}
390 	ioaccess(addr, phys, size);
391 #ifdef PHYSMEMDEBUG
392 	printf("mips_map_physmem: alloc'ed %x bytes for paddr %x, at %x\n",
393 	    size, phys, addr);
394 #endif
395 	return addr | (phys & PAGE_MASK);
396 }
397 
398 /*
399  * Unmaps the previous mapped (addr, size) pair.
400  */
401 void
mips_unmap_physmem(vaddr_t addr,vsize_t size)402 mips_unmap_physmem(vaddr_t addr, vsize_t size)
403 {
404 #ifdef PHYSMEMDEBUG
405 	printf("mips_unmap_physmem: unmapping %x bytes at addr %x\n",
406 	    size, addr);
407 #endif
408 	size += addr & PAGE_MASK;
409 	addr &= ~PAGE_MASK;
410 
411 	iounaccess(addr, size);
412 	if (size >= PAGE_SIZE)
413 		uvm_km_free(kernel_map, addr, size, UVM_KMF_VAONLY);
414 	else if (extent_free(iomap_ex, addr, size,
415 	    EX_NOWAIT | (iomap_ex_malloc_safe ? EX_MALLOCOK : 0)))
416 		printf("mips_unmap_physmem: addr 0x%llx size %llx: "
417 		    "can't free region\n", (long long)addr, (long long)size);
418 }
419 
420 /*
421  * Machine-dependent startup code: allocate memory for variable-sized
422  * tables.
423  */
424 void
cpu_startup(void)425 cpu_startup(void)
426 {
427 	vaddr_t minaddr, maxaddr;
428 	char pbuf[9];
429 #ifdef DEBUG
430 	extern int pmapdebug;		/* XXX */
431 	int opmapdebug = pmapdebug;
432 
433 	pmapdebug = 0;
434 #endif
435 
436 	/*
437 	 * Good {morning,afternoon,evening,night}.
438 	 */
439 	printf("%s%s", copyright, version);
440 	printf("%s\n", cpu_getmodel());
441 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
442 	printf("total memory = %s\n", pbuf);
443 
444 	minaddr = 0;
445 
446 	/*
447 	 * Allocate a submap for physio
448 	 */
449 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
450 				   VM_PHYS_SIZE, 0, false, NULL);
451 
452 	/*
453 	 * No need to allocate an mbuf cluster submap.  Mbuf clusters
454 	 * are allocated via the pool allocator, and we use KSEG to
455 	 * map those pages.
456 	 */
457 
458 	iomap_ex_malloc_safe = 1;
459 
460 #ifdef DEBUG
461 	pmapdebug = opmapdebug;
462 #endif
463 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false)));
464 	printf("avail memory = %s\n", pbuf);
465 }
466 
467 /*
468  * Look up information in bootinfo of boot loader.
469  */
470 void *
lookup_bootinfo(int type)471 lookup_bootinfo(int type)
472 {
473 	struct btinfo_common *bt;
474 	char *help = bootinfo;
475 
476 	/* Check for a bootinfo record first. */
477 	if (help == NULL)
478 		return (NULL);
479 
480 	do {
481 		bt = (struct btinfo_common *)help;
482 		if (bt->type == type)
483 			return ((void *)help);
484 		help += bt->next;
485 	} while (bt->next != 0 &&
486 		(size_t)help < (size_t)bootinfo + BOOTINFO_SIZE);
487 
488 	return (NULL);
489 }
490 
491 void
cpu_reboot(volatile int howto,char * bootstr)492 cpu_reboot(volatile int howto,	/* XXX volatile to keep gcc happy */
493            char *bootstr)
494 {
495 
496 	/* take a snap shot before clobbering any registers */
497 	if (curlwp)
498 		savectx(curpcb);
499 
500 #ifdef DEBUG
501 	if (panicstr)
502 		stacktrace();
503 #endif
504 
505 	/* If system is cold, just halt. */
506 	if (cold) {
507 		howto |= RB_HALT;
508 		goto haltsys;
509 	}
510 
511 	/* If "always halt" was specified as a boot flag, obey. */
512 	if ((boothowto & RB_HALT) != 0)
513 		howto |= RB_HALT;
514 
515 	boothowto = howto;
516 	if ((howto & RB_NOSYNC) == 0) {
517 		/*
518 		 * Synchronize the disks....
519 		 */
520 		vfs_shutdown();
521 	}
522 
523 	/* Disable interrupts. */
524 	splhigh();
525 
526 	/* If rebooting and a dump is requested do it. */
527 	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
528 		dumpsys();
529 
530 haltsys:
531 	/* run any shutdown hooks */
532 	doshutdownhooks();
533 
534 	pmf_system_shutdown(boothowto);
535 
536 	/* Finally, halt/reboot the system. */
537 	printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
538 
539 	prom_halt(howto);
540 	for (;;) ;
541 	/*NOTREACHED*/
542 }
543 
544 #if defined(MIPS_4GB_PHYSICAL_MEMORY)
545 #define trim_memory(n) n
546 #else
547 #if 0
548 #define TOO_MUCH (MIPS_PHYS_MASK+1)
549 #else
550 #define TOO_MUCH (2*64*1024*1024)
551 #endif
552 u_long trim_memory(uint32_t nbytes);/*cheat*/
trim_memory(uint32_t nbytes)553 u_long trim_memory(uint32_t nbytes)
554 {
555 	int i;
556 	u_long first, last;
557 
558 	nbytes *= 4096;
559 	if (nbytes <= TOO_MUCH)
560 		return nbytes;
561 
562 	/* We have more memory than we can handle */
563 
564 	mem_clusters[mem_cluster_cnt].start = 0;/* sentinel record */
565 	mem_clusters[mem_cluster_cnt].size = 0;
566 	for (i = 0; i < mem_cluster_cnt;) {
567 		first = mem_clusters[i].start;
568 		last = mem_clusters[i].start + mem_clusters[i].size;
569 
570 		if (first > TOO_MUCH) {
571 			printf("Too much memory, ignoring memory "
572 			    "range %08lx..%08lx\n", first, last);
573 			memcpy(mem_clusters+i,mem_clusters+i+1,
574 			    (sizeof(mem_clusters[0])*(mem_cluster_cnt-i)));
575 			mem_cluster_cnt--;
576 			continue;
577 		}
578 
579 		if (last > TOO_MUCH) {
580 			last = TOO_MUCH;
581 			printf("Too much memory in cluster %d, trimming "
582 			   "memory to range %08lx..%08lx\n",
583 			   i, first, last);
584 			mem_clusters[i].size = last - mem_clusters[i].start;
585 		}
586 		i++;
587 	}
588 	return TOO_MUCH;
589 }
590 #endif
591 
592 /*
593  * Find out how much memory is available by testing memory.
594  */
595 int
memsize_scan(void * first)596 memsize_scan(void *first)
597 {
598 	int i, mem;
599 	char *cp;
600 
601 	mem = btoc((paddr_t)first - MIPS_KSEG0_START);
602 	cp = (char *)MIPS_PHYS_TO_KSEG1(mem << PGSHIFT);
603 	while (cp < (char *)physmem_boardmax) {
604 	  	int j;
605 		if (badaddr(cp, 4))
606 			break;
607 		i = *(int *)cp;
608 		j = ((int *)cp)[4];
609 		*(int *)cp = 0xa5a5a5a5;
610 		/*
611 		 * Data will persist on the bus if we read it right away.
612 		 * Have to be tricky here.
613 		 */
614 		((int *)cp)[4] = 0x5a5a5a5a;
615 		wbflush();
616 		if (*(int *)cp != 0xa5a5a5a5)
617 			break;
618 		*(int *)cp = i;
619 		((int *)cp)[4] = j;
620 		cp += PAGE_SIZE;
621 		mem++;
622 	}
623 
624 	/*
625 	 * Now that we know how much memory we have, initialize the
626 	 * mem cluster array.
627 	 */
628 	mem_clusters[0].start = 0;		/* XXX is this correct? */
629 	mem_clusters[0].size  = ctob(mem);
630 	mem_cluster_cnt = 1;
631 
632 	/* clear any memory error conditions possibly caused by probe */
633 	(*platform.bus_reset)();
634 	return (mem);
635 }
636 
637 /*
638  * Find out how much memory is available by testing memory, starting at first.
639  * Returns the total number of pages.
640  */
641 int
memsize_pmt(void * first)642 memsize_pmt(void * first)
643 {
644 	int i, mem;
645 	struct _Pmt *Pmt = ThePmt;
646 	struct _Sram *ram;
647 	uint32_t addr, len;
648 
649 	/*
650 	 * Build the RAM memory map from the PMT.
651 	 */
652 	mem = 0;
653 	for (i = 0; i < VM_PHYSSEG_MAX; Pmt--) {
654 		uint16_t tag = Pmt->Tag;
655 
656 		if (tag == PMTTAG_END_OF_TABLE)
657 			break;
658 
659 		if ((tag != PMTTAG_SRAM) && (tag != PMTTAG_DDRAM))
660 			continue;
661 
662 		/*
663 		 * Got a memory controller segment,
664 		 * scan all the controllers in it
665 		 */
666 		ram = (struct _Sram *)(Pmt->TopOfPhysicalAddress << 16);
667 
668 		for (;(ram->BaseAddressAndTag & SRAMBT_TAG) == tag;) {
669 			addr = ram->BaseAddressAndTag & SRAMBT_BASE;
670 			len  = ram->Control & SRAMST_SIZE;
671 
672 			mem_clusters[i].start = addr;
673 			mem_clusters[i].size  = len;
674 			printf("memory segment %2d start %08lx size %08lx\n", i,
675 			    (long)mem_clusters[i].start,
676 			    (long)mem_clusters[i].size);
677 			i++;
678 			mem += len;
679 
680 			/* SRAM and DDRAM have different sizes */
681 			ram = (tag == PMTTAG_SRAM) ? ram+1 : ram+2;
682 		}
683 	}
684 	mem_cluster_cnt = i;
685 
686 	return trim_memory(btoc(mem));
687 }
688 /*
689  *  Ensure all platform vectors are always initialized.
690  */
691 static void
unimpl_bus_reset(void)692 unimpl_bus_reset(void)
693 {
694 
695 	panic("sysconf.init didn't set bus_reset");
696 }
697 
698 static void
unimpl_cons_init(void)699 unimpl_cons_init(void)
700 {
701 
702 	panic("sysconf.init didn't set cons_init");
703 }
704 
705 static void
unimpl_iointr(uint32_t status,vaddr_t pc,uint32_t ipending)706 unimpl_iointr(uint32_t status, vaddr_t pc, uint32_t ipending)
707 {
708 
709 	panic("sysconf.init didn't set intr");
710 }
711 
712 static void
unimpl_intr_establish(device_t dev,void * cookie,int level,int (* handler)(void *,void *),void * arg)713 unimpl_intr_establish(device_t dev, void *cookie, int level,
714                       int (*handler) (void *,void *), void *arg)
715 {
716 
717 	panic("sysconf.init didn't set intr_establish");
718 }
719 
720 static int
unimpl_memsize(void * first)721 unimpl_memsize(void * first)
722 {
723 
724 	panic("sysconf.init didn't set memsize");
725 }
726 
727 /*
728  * Wait "n" microseconds.
729  */
730 void
delay(int n)731 delay(int n)
732 {
733 
734 	DELAY(n);
735 }
736