1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *  linux/arch/alpha/kernel/setup.c
4  *
5  *  Copyright (C) 1995  Linus Torvalds
6  */
7 
8 /* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
9 
10 /*
11  * Bootup setup stuff.
12  */
13 
14 #include <linux/sched.h>
15 #include <linux/kernel.h>
16 #include <linux/mm.h>
17 #include <linux/stddef.h>
18 #include <linux/unistd.h>
19 #include <linux/ptrace.h>
20 #include <linux/slab.h>
21 #include <linux/user.h>
22 #include <linux/screen_info.h>
23 #include <linux/delay.h>
24 #include <linux/mc146818rtc.h>
25 #include <linux/console.h>
26 #include <linux/cpu.h>
27 #include <linux/errno.h>
28 #include <linux/init.h>
29 #include <linux/string.h>
30 #include <linux/ioport.h>
31 #include <linux/panic_notifier.h>
32 #include <linux/platform_device.h>
33 #include <linux/memblock.h>
34 #include <linux/pci.h>
35 #include <linux/seq_file.h>
36 #include <linux/root_dev.h>
37 #include <linux/initrd.h>
38 #include <linux/eisa.h>
39 #include <linux/pfn.h>
40 #ifdef CONFIG_MAGIC_SYSRQ
41 #include <linux/sysrq.h>
42 #include <linux/reboot.h>
43 #endif
44 #include <linux/notifier.h>
45 #include <asm/setup.h>
46 #include <asm/io.h>
47 #include <linux/log2.h>
48 #include <linux/export.h>
49 
50 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
51 static struct notifier_block alpha_panic_block = {
52 	alpha_panic_event,
53         NULL,
54         INT_MAX /* try to do it first */
55 };
56 
57 #include <linux/uaccess.h>
58 #include <asm/hwrpb.h>
59 #include <asm/dma.h>
60 #include <asm/mmu_context.h>
61 #include <asm/console.h>
62 
63 #include "proto.h"
64 #include "pci_impl.h"
65 
66 
67 struct hwrpb_struct *hwrpb;
68 EXPORT_SYMBOL(hwrpb);
69 unsigned long srm_hae;
70 
71 int alpha_l1i_cacheshape;
72 int alpha_l1d_cacheshape;
73 int alpha_l2_cacheshape;
74 int alpha_l3_cacheshape;
75 
76 #ifdef CONFIG_VERBOSE_MCHECK
77 /* 0=minimum, 1=verbose, 2=all */
78 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
79 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
80 #endif
81 
82 /* Which processor we booted from.  */
83 int boot_cpuid;
84 
85 /*
86  * Using SRM callbacks for initial console output. This works from
87  * setup_arch() time through the end of time_init(), as those places
88  * are under our (Alpha) control.
89 
90  * "srmcons" specified in the boot command arguments allows us to
91  * see kernel messages during the period of time before the true
92  * console device is "registered" during console_init().
93  * As of this version (2.5.59), console_init() will call
94  * disable_early_printk() as the last action before initializing
95  * the console drivers. That's the last possible time srmcons can be
96  * unregistered without interfering with console behavior.
97  *
98  * By default, OFF; set it with a bootcommand arg of "srmcons" or
99  * "console=srm". The meaning of these two args is:
100  *     "srmcons"     - early callback prints
101  *     "console=srm" - full callback based console, including early prints
102  */
103 int srmcons_output = 0;
104 
105 /* Enforce a memory size limit; useful for testing. By default, none. */
106 unsigned long mem_size_limit = 0;
107 
108 /* Set AGP GART window size (0 means disabled). */
109 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
110 
111 #ifdef CONFIG_ALPHA_GENERIC
112 struct alpha_machine_vector alpha_mv;
113 EXPORT_SYMBOL(alpha_mv);
114 #endif
115 
116 #ifndef alpha_using_srm
117 int alpha_using_srm;
118 EXPORT_SYMBOL(alpha_using_srm);
119 #endif
120 
121 #ifndef alpha_using_qemu
122 int alpha_using_qemu;
123 #endif
124 
125 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
126 					       unsigned long);
127 static struct alpha_machine_vector *get_sysvec_byname(const char *);
128 static void get_sysnames(unsigned long, unsigned long, unsigned long,
129 			 char **, char **);
130 static void determine_cpu_caches (unsigned int);
131 
132 static char __initdata command_line[COMMAND_LINE_SIZE];
133 
134 /*
135  * The format of "screen_info" is strange, and due to early
136  * i386-setup code. This is just enough to make the console
137  * code think we're on a VGA color display.
138  */
139 
140 struct screen_info screen_info = {
141 	.orig_x = 0,
142 	.orig_y = 25,
143 	.orig_video_cols = 80,
144 	.orig_video_lines = 25,
145 	.orig_video_isVGA = 1,
146 	.orig_video_points = 16
147 };
148 
149 EXPORT_SYMBOL(screen_info);
150 
151 /*
152  * The direct map I/O window, if any.  This should be the same
153  * for all busses, since it's used by virt_to_bus.
154  */
155 
156 unsigned long __direct_map_base;
157 unsigned long __direct_map_size;
158 EXPORT_SYMBOL(__direct_map_base);
159 EXPORT_SYMBOL(__direct_map_size);
160 
161 /*
162  * Declare all of the machine vectors.
163  */
164 
165 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either
166    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
167    to the assembler.  */
168 
169 #define WEAK(X) \
170 	extern struct alpha_machine_vector X; \
171 	asm(".weak "#X)
172 
173 WEAK(alcor_mv);
174 WEAK(alphabook1_mv);
175 WEAK(avanti_mv);
176 WEAK(cabriolet_mv);
177 WEAK(clipper_mv);
178 WEAK(dp264_mv);
179 WEAK(eb164_mv);
180 WEAK(eb64p_mv);
181 WEAK(eb66_mv);
182 WEAK(eb66p_mv);
183 WEAK(eiger_mv);
184 WEAK(jensen_mv);
185 WEAK(lx164_mv);
186 WEAK(lynx_mv);
187 WEAK(marvel_ev7_mv);
188 WEAK(miata_mv);
189 WEAK(mikasa_mv);
190 WEAK(mikasa_primo_mv);
191 WEAK(monet_mv);
192 WEAK(nautilus_mv);
193 WEAK(noname_mv);
194 WEAK(noritake_mv);
195 WEAK(noritake_primo_mv);
196 WEAK(p2k_mv);
197 WEAK(pc164_mv);
198 WEAK(privateer_mv);
199 WEAK(rawhide_mv);
200 WEAK(ruffian_mv);
201 WEAK(rx164_mv);
202 WEAK(sable_mv);
203 WEAK(sable_gamma_mv);
204 WEAK(shark_mv);
205 WEAK(sx164_mv);
206 WEAK(takara_mv);
207 WEAK(titan_mv);
208 WEAK(webbrick_mv);
209 WEAK(wildfire_mv);
210 WEAK(xl_mv);
211 WEAK(xlt_mv);
212 
213 #undef WEAK
214 
215 /*
216  * I/O resources inherited from PeeCees.  Except for perhaps the
217  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
218  *
219  * ??? If this becomes less standard, move the struct out into the
220  * machine vector.
221  */
222 
223 static void __init
reserve_std_resources(void)224 reserve_std_resources(void)
225 {
226 	static struct resource standard_io_resources[] = {
227 		{ .name = "rtc", .start = -1, .end = -1 },
228         	{ .name = "dma1", .start = 0x00, .end = 0x1f },
229         	{ .name = "pic1", .start = 0x20, .end = 0x3f },
230         	{ .name = "timer", .start = 0x40, .end = 0x5f },
231         	{ .name = "keyboard", .start = 0x60, .end = 0x6f },
232         	{ .name = "dma page reg", .start = 0x80, .end = 0x8f },
233         	{ .name = "pic2", .start = 0xa0, .end = 0xbf },
234         	{ .name = "dma2", .start = 0xc0, .end = 0xdf },
235 	};
236 
237 	struct resource *io = &ioport_resource;
238 	size_t i;
239 
240 	if (hose_head) {
241 		struct pci_controller *hose;
242 		for (hose = hose_head; hose; hose = hose->next)
243 			if (hose->index == 0) {
244 				io = hose->io_space;
245 				break;
246 			}
247 	}
248 
249 	/* Fix up for the Jensen's queer RTC placement.  */
250 	standard_io_resources[0].start = RTC_PORT(0);
251 	standard_io_resources[0].end = RTC_PORT(0) + 0x0f;
252 
253 	for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
254 		request_resource(io, standard_io_resources+i);
255 }
256 
257 #define PFN_MAX		PFN_DOWN(0x80000000)
258 #define for_each_mem_cluster(memdesc, _cluster, i)		\
259 	for ((_cluster) = (memdesc)->cluster, (i) = 0;		\
260 	     (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
261 
262 static unsigned long __init
get_mem_size_limit(char * s)263 get_mem_size_limit(char *s)
264 {
265         unsigned long end = 0;
266         char *from = s;
267 
268         end = simple_strtoul(from, &from, 0);
269         if ( *from == 'K' || *from == 'k' ) {
270                 end = end << 10;
271                 from++;
272         } else if ( *from == 'M' || *from == 'm' ) {
273                 end = end << 20;
274                 from++;
275         } else if ( *from == 'G' || *from == 'g' ) {
276                 end = end << 30;
277                 from++;
278         }
279         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
280 }
281 
282 #ifdef CONFIG_BLK_DEV_INITRD
283 void * __init
move_initrd(unsigned long mem_limit)284 move_initrd(unsigned long mem_limit)
285 {
286 	void *start;
287 	unsigned long size;
288 
289 	size = initrd_end - initrd_start;
290 	start = memblock_alloc(PAGE_ALIGN(size), PAGE_SIZE);
291 	if (!start || __pa(start) + size > mem_limit) {
292 		initrd_start = initrd_end = 0;
293 		return NULL;
294 	}
295 	memmove(start, (void *)initrd_start, size);
296 	initrd_start = (unsigned long)start;
297 	initrd_end = initrd_start + size;
298 	printk("initrd moved to %p\n", start);
299 	return start;
300 }
301 #endif
302 
303 static void __init
setup_memory(void * kernel_end)304 setup_memory(void *kernel_end)
305 {
306 	struct memclust_struct * cluster;
307 	struct memdesc_struct * memdesc;
308 	unsigned long kernel_size;
309 	unsigned long i;
310 
311 	/* Find free clusters, and init and free the bootmem accordingly.  */
312 	memdesc = (struct memdesc_struct *)
313 	  (hwrpb->mddt_offset + (unsigned long) hwrpb);
314 
315 	for_each_mem_cluster(memdesc, cluster, i) {
316 		unsigned long end;
317 
318 		printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
319 		       i, cluster->usage, cluster->start_pfn,
320 		       cluster->start_pfn + cluster->numpages);
321 
322 		end = cluster->start_pfn + cluster->numpages;
323 		if (end > max_low_pfn)
324 			max_low_pfn = end;
325 
326 		memblock_add(PFN_PHYS(cluster->start_pfn),
327 			     cluster->numpages << PAGE_SHIFT);
328 
329 		/* Bit 0 is console/PALcode reserved.  Bit 1 is
330 		   non-volatile memory -- we might want to mark
331 		   this for later.  */
332 		if (cluster->usage & 3)
333 			memblock_reserve(PFN_PHYS(cluster->start_pfn),
334 				         cluster->numpages << PAGE_SHIFT);
335 	}
336 
337 	/*
338 	 * Except for the NUMA systems (wildfire, marvel) all of the
339 	 * Alpha systems we run on support 32GB of memory or less.
340 	 * Since the NUMA systems introduce large holes in memory addressing,
341 	 * we can get into a situation where there is not enough contiguous
342 	 * memory for the memory map.
343 	 *
344 	 * Limit memory to the first 32GB to limit the NUMA systems to
345 	 * memory on their first node (wildfire) or 2 (marvel) to avoid
346 	 * not being able to produce the memory map. In order to access
347 	 * all of the memory on the NUMA systems, build with discontiguous
348 	 * memory support.
349 	 *
350 	 * If the user specified a memory limit, let that memory limit stand.
351 	 */
352 	if (!mem_size_limit)
353 		mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
354 
355 	if (mem_size_limit && max_low_pfn >= mem_size_limit)
356 	{
357 		printk("setup: forcing memory size to %ldK (from %ldK).\n",
358 		       mem_size_limit << (PAGE_SHIFT - 10),
359 		       max_low_pfn    << (PAGE_SHIFT - 10));
360 		max_low_pfn = mem_size_limit;
361 	}
362 
363 	/* Reserve the kernel memory. */
364 	kernel_size = virt_to_phys(kernel_end) - KERNEL_START_PHYS;
365 	memblock_reserve(KERNEL_START_PHYS, kernel_size);
366 
367 #ifdef CONFIG_BLK_DEV_INITRD
368 	initrd_start = INITRD_START;
369 	if (initrd_start) {
370 		initrd_end = initrd_start+INITRD_SIZE;
371 		printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
372 		       (void *) initrd_start, INITRD_SIZE);
373 
374 		if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
375 			if (!move_initrd(PFN_PHYS(max_low_pfn)))
376 				printk("initrd extends beyond end of memory "
377 				       "(0x%08lx > 0x%p)\ndisabling initrd\n",
378 				       initrd_end,
379 				       phys_to_virt(PFN_PHYS(max_low_pfn)));
380 		} else {
381 			memblock_reserve(virt_to_phys((void *)initrd_start),
382 					INITRD_SIZE);
383 		}
384 	}
385 #endif /* CONFIG_BLK_DEV_INITRD */
386 }
387 
388 int __init
page_is_ram(unsigned long pfn)389 page_is_ram(unsigned long pfn)
390 {
391 	struct memclust_struct * cluster;
392 	struct memdesc_struct * memdesc;
393 	unsigned long i;
394 
395 	memdesc = (struct memdesc_struct *)
396 		(hwrpb->mddt_offset + (unsigned long) hwrpb);
397 	for_each_mem_cluster(memdesc, cluster, i)
398 	{
399 		if (pfn >= cluster->start_pfn  &&
400 		    pfn < cluster->start_pfn + cluster->numpages) {
401 			return (cluster->usage & 3) ? 0 : 1;
402 		}
403 	}
404 
405 	return 0;
406 }
407 
408 static int __init
register_cpus(void)409 register_cpus(void)
410 {
411 	int i;
412 
413 	for_each_possible_cpu(i) {
414 		struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
415 		if (!p)
416 			return -ENOMEM;
417 		register_cpu(p, i);
418 	}
419 	return 0;
420 }
421 
422 arch_initcall(register_cpus);
423 
424 #ifdef CONFIG_MAGIC_SYSRQ
sysrq_reboot_handler(int unused)425 static void sysrq_reboot_handler(int unused)
426 {
427 	machine_halt();
428 }
429 
430 static const struct sysrq_key_op srm_sysrq_reboot_op = {
431 	.handler	= sysrq_reboot_handler,
432 	.help_msg       = "reboot(b)",
433 	.action_msg     = "Resetting",
434 	.enable_mask    = SYSRQ_ENABLE_BOOT,
435 };
436 #endif
437 
438 void __init
setup_arch(char ** cmdline_p)439 setup_arch(char **cmdline_p)
440 {
441 	extern char _end[];
442 
443 	struct alpha_machine_vector *vec = NULL;
444 	struct percpu_struct *cpu;
445 	char *type_name, *var_name, *p;
446 	void *kernel_end = _end; /* end of kernel */
447 	char *args = command_line;
448 
449 	hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
450 	boot_cpuid = hard_smp_processor_id();
451 
452         /*
453 	 * Pre-process the system type to make sure it will be valid.
454 	 *
455 	 * This may restore real CABRIO and EB66+ family names, ie
456 	 * EB64+ and EB66.
457 	 *
458 	 * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
459 	 * and AS1200 (DIGITAL Server 5000 series) have the type as
460 	 * the negative of the real one.
461 	 */
462         if ((long)hwrpb->sys_type < 0) {
463 		hwrpb->sys_type = -((long)hwrpb->sys_type);
464 		hwrpb_update_checksum(hwrpb);
465 	}
466 
467 	/* Register a call for panic conditions. */
468 	atomic_notifier_chain_register(&panic_notifier_list,
469 			&alpha_panic_block);
470 
471 #ifndef alpha_using_srm
472 	/* Assume that we've booted from SRM if we haven't booted from MILO.
473 	   Detect the later by looking for "MILO" in the system serial nr.  */
474 	alpha_using_srm = !str_has_prefix((const char *)hwrpb->ssn, "MILO");
475 #endif
476 #ifndef alpha_using_qemu
477 	/* Similarly, look for QEMU.  */
478 	alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0;
479 #endif
480 
481 	/* If we are using SRM, we want to allow callbacks
482 	   as early as possible, so do this NOW, and then
483 	   they should work immediately thereafter.
484 	*/
485 	kernel_end = callback_init(kernel_end);
486 
487 	/*
488 	 * Locate the command line.
489 	 */
490 	/* Hack for Jensen... since we're restricted to 8 or 16 chars for
491 	   boot flags depending on the boot mode, we need some shorthand.
492 	   This should do for installation.  */
493 	if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
494 		strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
495 	} else {
496 		strlcpy(command_line, COMMAND_LINE, sizeof command_line);
497 	}
498 	strcpy(boot_command_line, command_line);
499 	*cmdline_p = command_line;
500 
501 	/*
502 	 * Process command-line arguments.
503 	 */
504 	while ((p = strsep(&args, " \t")) != NULL) {
505 		if (!*p) continue;
506 		if (strncmp(p, "alpha_mv=", 9) == 0) {
507 			vec = get_sysvec_byname(p+9);
508 			continue;
509 		}
510 		if (strncmp(p, "cycle=", 6) == 0) {
511 			est_cycle_freq = simple_strtol(p+6, NULL, 0);
512 			continue;
513 		}
514 		if (strncmp(p, "mem=", 4) == 0) {
515 			mem_size_limit = get_mem_size_limit(p+4);
516 			continue;
517 		}
518 		if (strncmp(p, "srmcons", 7) == 0) {
519 			srmcons_output |= 1;
520 			continue;
521 		}
522 		if (strncmp(p, "console=srm", 11) == 0) {
523 			srmcons_output |= 2;
524 			continue;
525 		}
526 		if (strncmp(p, "gartsize=", 9) == 0) {
527 			alpha_agpgart_size =
528 				get_mem_size_limit(p+9) << PAGE_SHIFT;
529 			continue;
530 		}
531 #ifdef CONFIG_VERBOSE_MCHECK
532 		if (strncmp(p, "verbose_mcheck=", 15) == 0) {
533 			alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
534 			continue;
535 		}
536 #endif
537 	}
538 
539 	/* Replace the command line, now that we've killed it with strsep.  */
540 	strcpy(command_line, boot_command_line);
541 
542 	/* If we want SRM console printk echoing early, do it now. */
543 	if (alpha_using_srm && srmcons_output) {
544 		register_srm_console();
545 
546 		/*
547 		 * If "console=srm" was specified, clear the srmcons_output
548 		 * flag now so that time.c won't unregister_srm_console
549 		 */
550 		if (srmcons_output & 2)
551 			srmcons_output = 0;
552 	}
553 
554 #ifdef CONFIG_MAGIC_SYSRQ
555 	/* If we're using SRM, make sysrq-b halt back to the prom,
556 	   not auto-reboot.  */
557 	if (alpha_using_srm) {
558 		unregister_sysrq_key('b', __sysrq_reboot_op);
559 		register_sysrq_key('b', &srm_sysrq_reboot_op);
560 	}
561 #endif
562 
563 	/*
564 	 * Identify and reconfigure for the current system.
565 	 */
566 	cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
567 
568 	get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
569 		     cpu->type, &type_name, &var_name);
570 	if (*var_name == '0')
571 		var_name = "";
572 
573 	if (!vec) {
574 		vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
575 				 cpu->type);
576 	}
577 
578 	if (!vec) {
579 		panic("Unsupported system type: %s%s%s (%ld %ld)\n",
580 		      type_name, (*var_name ? " variation " : ""), var_name,
581 		      hwrpb->sys_type, hwrpb->sys_variation);
582 	}
583 	if (vec != &alpha_mv) {
584 		alpha_mv = *vec;
585 	}
586 
587 	printk("Booting "
588 #ifdef CONFIG_ALPHA_GENERIC
589 	       "GENERIC "
590 #endif
591 	       "on %s%s%s using machine vector %s from %s\n",
592 	       type_name, (*var_name ? " variation " : ""),
593 	       var_name, alpha_mv.vector_name,
594 	       (alpha_using_srm ? "SRM" : "MILO"));
595 
596 	printk("Major Options: "
597 #ifdef CONFIG_SMP
598 	       "SMP "
599 #endif
600 #ifdef CONFIG_ALPHA_EV56
601 	       "EV56 "
602 #endif
603 #ifdef CONFIG_ALPHA_EV67
604 	       "EV67 "
605 #endif
606 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
607 	       "LEGACY_START "
608 #endif
609 #ifdef CONFIG_VERBOSE_MCHECK
610 	       "VERBOSE_MCHECK "
611 #endif
612 
613 #ifdef CONFIG_DEBUG_SPINLOCK
614 	       "DEBUG_SPINLOCK "
615 #endif
616 #ifdef CONFIG_MAGIC_SYSRQ
617 	       "MAGIC_SYSRQ "
618 #endif
619 	       "\n");
620 
621 	printk("Command line: %s\n", command_line);
622 
623 	/*
624 	 * Sync up the HAE.
625 	 * Save the SRM's current value for restoration.
626 	 */
627 	srm_hae = *alpha_mv.hae_register;
628 	__set_hae(alpha_mv.hae_cache);
629 
630 	/* Reset enable correctable error reports.  */
631 	wrmces(0x7);
632 
633 	/* Find our memory.  */
634 	setup_memory(kernel_end);
635 	memblock_set_bottom_up(true);
636 	sparse_init();
637 
638 	/* First guess at cpu cache sizes.  Do this before init_arch.  */
639 	determine_cpu_caches(cpu->type);
640 
641 	/* Initialize the machine.  Usually has to do with setting up
642 	   DMA windows and the like.  */
643 	if (alpha_mv.init_arch)
644 		alpha_mv.init_arch();
645 
646 	/* Reserve standard resources.  */
647 	reserve_std_resources();
648 
649 	/*
650 	 * Give us a default console.  TGA users will see nothing until
651 	 * chr_dev_init is called, rather late in the boot sequence.
652 	 */
653 
654 #ifdef CONFIG_VT
655 #if defined(CONFIG_VGA_CONSOLE)
656 	conswitchp = &vga_con;
657 #endif
658 #endif
659 
660 	/* Default root filesystem to sda2.  */
661 	ROOT_DEV = Root_SDA2;
662 
663 #ifdef CONFIG_EISA
664 	/* FIXME:  only set this when we actually have EISA in this box? */
665 	EISA_bus = 1;
666 #endif
667 
668  	/*
669 	 * Check ASN in HWRPB for validity, report if bad.
670 	 * FIXME: how was this failing?  Should we trust it instead,
671 	 * and copy the value into alpha_mv.max_asn?
672  	 */
673 
674  	if (hwrpb->max_asn != MAX_ASN) {
675 		printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
676  	}
677 
678 	/*
679 	 * Identify the flock of penguins.
680 	 */
681 
682 #ifdef CONFIG_SMP
683 	setup_smp();
684 #endif
685 	paging_init();
686 }
687 
688 static char sys_unknown[] = "Unknown";
689 static char systype_names[][16] = {
690 	"0",
691 	"ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
692 	"Pelican", "Morgan", "Sable", "Medulla", "Noname",
693 	"Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
694 	"Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
695 	"Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
696 	"Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
697 	"Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
698 };
699 
700 static char unofficial_names[][8] = {"100", "Ruffian"};
701 
702 static char api_names[][16] = {"200", "Nautilus"};
703 
704 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
705 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
706 
707 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
708 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
709 
710 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
711 static int eb64p_indices[] = {0,0,1,2};
712 
713 static char eb66_names[][8] = {"EB66", "EB66+"};
714 static int eb66_indices[] = {0,0,1};
715 
716 static char marvel_names[][16] = {
717 	"Marvel/EV7"
718 };
719 static int marvel_indices[] = { 0 };
720 
721 static char rawhide_names[][16] = {
722 	"Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
723 };
724 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
725 
726 static char titan_names[][16] = {
727 	"DEFAULT", "Privateer", "Falcon", "Granite"
728 };
729 static int titan_indices[] = {0,1,2,2,3};
730 
731 static char tsunami_names[][16] = {
732 	"0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
733 	"Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
734 	"Flying Clipper", "Shark"
735 };
736 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
737 
738 static struct alpha_machine_vector * __init
get_sysvec(unsigned long type,unsigned long variation,unsigned long cpu)739 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
740 {
741 	static struct alpha_machine_vector *systype_vecs[] __initdata =
742 	{
743 		NULL,		/* 0 */
744 		NULL,		/* ADU */
745 		NULL,		/* Cobra */
746 		NULL,		/* Ruby */
747 		NULL,		/* Flamingo */
748 		NULL,		/* Mannequin */
749 		&jensen_mv,
750 		NULL, 		/* Pelican */
751 		NULL,		/* Morgan */
752 		NULL,		/* Sable -- see below.  */
753 		NULL,		/* Medulla */
754 		&noname_mv,
755 		NULL,		/* Turbolaser */
756 		&avanti_mv,
757 		NULL,		/* Mustang */
758 		NULL,		/* Alcor, Bret, Maverick. HWRPB inaccurate? */
759 		NULL,		/* Tradewind */
760 		NULL,		/* Mikasa -- see below.  */
761 		NULL,		/* EB64 */
762 		NULL,		/* EB66 -- see variation.  */
763 		NULL,		/* EB64+ -- see variation.  */
764 		&alphabook1_mv,
765 		&rawhide_mv,
766 		NULL,		/* K2 */
767 		&lynx_mv,	/* Lynx */
768 		&xl_mv,
769 		NULL,		/* EB164 -- see variation.  */
770 		NULL,		/* Noritake -- see below.  */
771 		NULL,		/* Cortex */
772 		NULL,		/* 29 */
773 		&miata_mv,
774 		NULL,		/* XXM */
775 		&takara_mv,
776 		NULL,		/* Yukon */
777 		NULL,		/* Tsunami -- see variation.  */
778 		&wildfire_mv,	/* Wildfire */
779 		NULL,		/* CUSCO */
780 		&eiger_mv,	/* Eiger */
781 		NULL,		/* Titan */
782 		NULL,		/* Marvel */
783 	};
784 
785 	static struct alpha_machine_vector *unofficial_vecs[] __initdata =
786 	{
787 		NULL,		/* 100 */
788 		&ruffian_mv,
789 	};
790 
791 	static struct alpha_machine_vector *api_vecs[] __initdata =
792 	{
793 		NULL,		/* 200 */
794 		&nautilus_mv,
795 	};
796 
797 	static struct alpha_machine_vector *alcor_vecs[] __initdata =
798 	{
799 		&alcor_mv, &xlt_mv, &xlt_mv
800 	};
801 
802 	static struct alpha_machine_vector *eb164_vecs[] __initdata =
803 	{
804 		&eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
805 	};
806 
807 	static struct alpha_machine_vector *eb64p_vecs[] __initdata =
808 	{
809 		&eb64p_mv,
810 		&cabriolet_mv,
811 		&cabriolet_mv		/* AlphaPCI64 */
812 	};
813 
814 	static struct alpha_machine_vector *eb66_vecs[] __initdata =
815 	{
816 		&eb66_mv,
817 		&eb66p_mv
818 	};
819 
820 	static struct alpha_machine_vector *marvel_vecs[] __initdata =
821 	{
822 		&marvel_ev7_mv,
823 	};
824 
825 	static struct alpha_machine_vector *titan_vecs[] __initdata =
826 	{
827 		&titan_mv,		/* default   */
828 		&privateer_mv,		/* privateer */
829 		&titan_mv,		/* falcon    */
830 		&privateer_mv,		/* granite   */
831 	};
832 
833 	static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
834 	{
835 		NULL,
836 		&dp264_mv,		/* dp264 */
837 		&dp264_mv,		/* warhol */
838 		&dp264_mv,		/* windjammer */
839 		&monet_mv,		/* monet */
840 		&clipper_mv,		/* clipper */
841 		&dp264_mv,		/* goldrush */
842 		&webbrick_mv,		/* webbrick */
843 		&dp264_mv,		/* catamaran */
844 		NULL,			/* brisbane? */
845 		NULL,			/* melbourne? */
846 		NULL,			/* flying clipper? */
847 		&shark_mv,		/* shark */
848 	};
849 
850 	/* ??? Do we need to distinguish between Rawhides?  */
851 
852 	struct alpha_machine_vector *vec;
853 
854 	/* Search the system tables first... */
855 	vec = NULL;
856 	if (type < ARRAY_SIZE(systype_vecs)) {
857 		vec = systype_vecs[type];
858 	} else if ((type > ST_API_BIAS) &&
859 		   (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
860 		vec = api_vecs[type - ST_API_BIAS];
861 	} else if ((type > ST_UNOFFICIAL_BIAS) &&
862 		   (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
863 		vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
864 	}
865 
866 	/* If we've not found one, try for a variation.  */
867 
868 	if (!vec) {
869 		/* Member ID is a bit-field. */
870 		unsigned long member = (variation >> 10) & 0x3f;
871 
872 		cpu &= 0xffffffff; /* make it usable */
873 
874 		switch (type) {
875 		case ST_DEC_ALCOR:
876 			if (member < ARRAY_SIZE(alcor_indices))
877 				vec = alcor_vecs[alcor_indices[member]];
878 			break;
879 		case ST_DEC_EB164:
880 			if (member < ARRAY_SIZE(eb164_indices))
881 				vec = eb164_vecs[eb164_indices[member]];
882 			/* PC164 may show as EB164 variation with EV56 CPU,
883 			   but, since no true EB164 had anything but EV5... */
884 			if (vec == &eb164_mv && cpu == EV56_CPU)
885 				vec = &pc164_mv;
886 			break;
887 		case ST_DEC_EB64P:
888 			if (member < ARRAY_SIZE(eb64p_indices))
889 				vec = eb64p_vecs[eb64p_indices[member]];
890 			break;
891 		case ST_DEC_EB66:
892 			if (member < ARRAY_SIZE(eb66_indices))
893 				vec = eb66_vecs[eb66_indices[member]];
894 			break;
895 		case ST_DEC_MARVEL:
896 			if (member < ARRAY_SIZE(marvel_indices))
897 				vec = marvel_vecs[marvel_indices[member]];
898 			break;
899 		case ST_DEC_TITAN:
900 			vec = titan_vecs[0];	/* default */
901 			if (member < ARRAY_SIZE(titan_indices))
902 				vec = titan_vecs[titan_indices[member]];
903 			break;
904 		case ST_DEC_TSUNAMI:
905 			if (member < ARRAY_SIZE(tsunami_indices))
906 				vec = tsunami_vecs[tsunami_indices[member]];
907 			break;
908 		case ST_DEC_1000:
909 			if (cpu == EV5_CPU || cpu == EV56_CPU)
910 				vec = &mikasa_primo_mv;
911 			else
912 				vec = &mikasa_mv;
913 			break;
914 		case ST_DEC_NORITAKE:
915 			if (cpu == EV5_CPU || cpu == EV56_CPU)
916 				vec = &noritake_primo_mv;
917 			else
918 				vec = &noritake_mv;
919 			break;
920 		case ST_DEC_2100_A500:
921 			if (cpu == EV5_CPU || cpu == EV56_CPU)
922 				vec = &sable_gamma_mv;
923 			else
924 				vec = &sable_mv;
925 			break;
926 		}
927 	}
928 	return vec;
929 }
930 
931 static struct alpha_machine_vector * __init
get_sysvec_byname(const char * name)932 get_sysvec_byname(const char *name)
933 {
934 	static struct alpha_machine_vector *all_vecs[] __initdata =
935 	{
936 		&alcor_mv,
937 		&alphabook1_mv,
938 		&avanti_mv,
939 		&cabriolet_mv,
940 		&clipper_mv,
941 		&dp264_mv,
942 		&eb164_mv,
943 		&eb64p_mv,
944 		&eb66_mv,
945 		&eb66p_mv,
946 		&eiger_mv,
947 		&jensen_mv,
948 		&lx164_mv,
949 		&lynx_mv,
950 		&miata_mv,
951 		&mikasa_mv,
952 		&mikasa_primo_mv,
953 		&monet_mv,
954 		&nautilus_mv,
955 		&noname_mv,
956 		&noritake_mv,
957 		&noritake_primo_mv,
958 		&p2k_mv,
959 		&pc164_mv,
960 		&privateer_mv,
961 		&rawhide_mv,
962 		&ruffian_mv,
963 		&rx164_mv,
964 		&sable_mv,
965 		&sable_gamma_mv,
966 		&shark_mv,
967 		&sx164_mv,
968 		&takara_mv,
969 		&webbrick_mv,
970 		&wildfire_mv,
971 		&xl_mv,
972 		&xlt_mv
973 	};
974 
975 	size_t i;
976 
977 	for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
978 		struct alpha_machine_vector *mv = all_vecs[i];
979 		if (strcasecmp(mv->vector_name, name) == 0)
980 			return mv;
981 	}
982 	return NULL;
983 }
984 
985 static void
get_sysnames(unsigned long type,unsigned long variation,unsigned long cpu,char ** type_name,char ** variation_name)986 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
987 	     char **type_name, char **variation_name)
988 {
989 	unsigned long member;
990 
991 	/* If not in the tables, make it UNKNOWN,
992 	   else set type name to family */
993 	if (type < ARRAY_SIZE(systype_names)) {
994 		*type_name = systype_names[type];
995 	} else if ((type > ST_API_BIAS) &&
996 		   (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
997 		*type_name = api_names[type - ST_API_BIAS];
998 	} else if ((type > ST_UNOFFICIAL_BIAS) &&
999 		   (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1000 		*type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1001 	} else {
1002 		*type_name = sys_unknown;
1003 		*variation_name = sys_unknown;
1004 		return;
1005 	}
1006 
1007 	/* Set variation to "0"; if variation is zero, done.  */
1008 	*variation_name = systype_names[0];
1009 	if (variation == 0) {
1010 		return;
1011 	}
1012 
1013 	member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1014 
1015 	cpu &= 0xffffffff; /* make it usable */
1016 
1017 	switch (type) { /* select by family */
1018 	default: /* default to variation "0" for now */
1019 		break;
1020 	case ST_DEC_EB164:
1021 		if (member >= ARRAY_SIZE(eb164_indices))
1022 			break;
1023 		*variation_name = eb164_names[eb164_indices[member]];
1024 		/* PC164 may show as EB164 variation, but with EV56 CPU,
1025 		   so, since no true EB164 had anything but EV5... */
1026 		if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1027 			*variation_name = eb164_names[1]; /* make it PC164 */
1028 		break;
1029 	case ST_DEC_ALCOR:
1030 		if (member < ARRAY_SIZE(alcor_indices))
1031 			*variation_name = alcor_names[alcor_indices[member]];
1032 		break;
1033 	case ST_DEC_EB64P:
1034 		if (member < ARRAY_SIZE(eb64p_indices))
1035 			*variation_name = eb64p_names[eb64p_indices[member]];
1036 		break;
1037 	case ST_DEC_EB66:
1038 		if (member < ARRAY_SIZE(eb66_indices))
1039 			*variation_name = eb66_names[eb66_indices[member]];
1040 		break;
1041 	case ST_DEC_MARVEL:
1042 		if (member < ARRAY_SIZE(marvel_indices))
1043 			*variation_name = marvel_names[marvel_indices[member]];
1044 		break;
1045 	case ST_DEC_RAWHIDE:
1046 		if (member < ARRAY_SIZE(rawhide_indices))
1047 			*variation_name = rawhide_names[rawhide_indices[member]];
1048 		break;
1049 	case ST_DEC_TITAN:
1050 		*variation_name = titan_names[0];	/* default */
1051 		if (member < ARRAY_SIZE(titan_indices))
1052 			*variation_name = titan_names[titan_indices[member]];
1053 		break;
1054 	case ST_DEC_TSUNAMI:
1055 		if (member < ARRAY_SIZE(tsunami_indices))
1056 			*variation_name = tsunami_names[tsunami_indices[member]];
1057 		break;
1058 	}
1059 }
1060 
1061 /*
1062  * A change was made to the HWRPB via an ECO and the following code
1063  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1064  * was not implemented in the console firmware.  If it's revision 5 or
1065  * greater we can get the name of the platform as an ASCII string from
1066  * the HWRPB.  That's what this function does.  It checks the revision
1067  * level and if the string is in the HWRPB it returns the address of
1068  * the string--a pointer to the name of the platform.
1069  *
1070  * Returns:
1071  *      - Pointer to a ASCII string if it's in the HWRPB
1072  *      - Pointer to a blank string if the data is not in the HWRPB.
1073  */
1074 
1075 static char *
platform_string(void)1076 platform_string(void)
1077 {
1078 	struct dsr_struct *dsr;
1079 	static char unk_system_string[] = "N/A";
1080 
1081 	/* Go to the console for the string pointer.
1082 	 * If the rpb_vers is not 5 or greater the rpb
1083 	 * is old and does not have this data in it.
1084 	 */
1085 	if (hwrpb->revision < 5)
1086 		return (unk_system_string);
1087 	else {
1088 		/* The Dynamic System Recognition struct
1089 		 * has the system platform name starting
1090 		 * after the character count of the string.
1091 		 */
1092 		dsr =  ((struct dsr_struct *)
1093 			((char *)hwrpb + hwrpb->dsr_offset));
1094 		return ((char *)dsr + (dsr->sysname_off +
1095 				       sizeof(long)));
1096 	}
1097 }
1098 
1099 static int
get_nr_processors(struct percpu_struct * cpubase,unsigned long num)1100 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1101 {
1102 	struct percpu_struct *cpu;
1103 	unsigned long i;
1104 	int count = 0;
1105 
1106 	for (i = 0; i < num; i++) {
1107 		cpu = (struct percpu_struct *)
1108 			((char *)cpubase + i*hwrpb->processor_size);
1109 		if ((cpu->flags & 0x1cc) == 0x1cc)
1110 			count++;
1111 	}
1112 	return count;
1113 }
1114 
1115 static void
show_cache_size(struct seq_file * f,const char * which,int shape)1116 show_cache_size (struct seq_file *f, const char *which, int shape)
1117 {
1118 	if (shape == -1)
1119 		seq_printf (f, "%s\t\t: n/a\n", which);
1120 	else if (shape == 0)
1121 		seq_printf (f, "%s\t\t: unknown\n", which);
1122 	else
1123 		seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1124 			    which, shape >> 10, shape & 15,
1125 			    1 << ((shape >> 4) & 15));
1126 }
1127 
1128 static int
show_cpuinfo(struct seq_file * f,void * slot)1129 show_cpuinfo(struct seq_file *f, void *slot)
1130 {
1131 	extern struct unaligned_stat {
1132 		unsigned long count, va, pc;
1133 	} unaligned[2];
1134 
1135 	static char cpu_names[][8] = {
1136 		"EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1137 		"EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1138 		"EV68CX", "EV7", "EV79", "EV69"
1139 	};
1140 
1141 	struct percpu_struct *cpu = slot;
1142 	unsigned int cpu_index;
1143 	char *cpu_name;
1144 	char *systype_name;
1145 	char *sysvariation_name;
1146 	int nr_processors;
1147 	unsigned long timer_freq;
1148 
1149 	cpu_index = (unsigned) (cpu->type - 1);
1150 	cpu_name = "Unknown";
1151 	if (cpu_index < ARRAY_SIZE(cpu_names))
1152 		cpu_name = cpu_names[cpu_index];
1153 
1154 	get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1155 		     cpu->type, &systype_name, &sysvariation_name);
1156 
1157 	nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1158 
1159 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200
1160 	timer_freq = (100UL * hwrpb->intr_freq) / 4096;
1161 #else
1162 	timer_freq = 100UL * CONFIG_HZ;
1163 #endif
1164 
1165 	seq_printf(f, "cpu\t\t\t: Alpha\n"
1166 		      "cpu model\t\t: %s\n"
1167 		      "cpu variation\t\t: %ld\n"
1168 		      "cpu revision\t\t: %ld\n"
1169 		      "cpu serial number\t: %s\n"
1170 		      "system type\t\t: %s\n"
1171 		      "system variation\t: %s\n"
1172 		      "system revision\t\t: %ld\n"
1173 		      "system serial number\t: %s\n"
1174 		      "cycle frequency [Hz]\t: %lu %s\n"
1175 		      "timer frequency [Hz]\t: %lu.%02lu\n"
1176 		      "page size [bytes]\t: %ld\n"
1177 		      "phys. address bits\t: %ld\n"
1178 		      "max. addr. space #\t: %ld\n"
1179 		      "BogoMIPS\t\t: %lu.%02lu\n"
1180 		      "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1181 		      "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1182 		      "platform string\t\t: %s\n"
1183 		      "cpus detected\t\t: %d\n",
1184 		       cpu_name, cpu->variation, cpu->revision,
1185 		       (char*)cpu->serial_no,
1186 		       systype_name, sysvariation_name, hwrpb->sys_revision,
1187 		       (char*)hwrpb->ssn,
1188 		       est_cycle_freq ? : hwrpb->cycle_freq,
1189 		       est_cycle_freq ? "est." : "",
1190 		       timer_freq / 100, timer_freq % 100,
1191 		       hwrpb->pagesize,
1192 		       hwrpb->pa_bits,
1193 		       hwrpb->max_asn,
1194 		       loops_per_jiffy / (500000/HZ),
1195 		       (loops_per_jiffy / (5000/HZ)) % 100,
1196 		       unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1197 		       unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1198 		       platform_string(), nr_processors);
1199 
1200 #ifdef CONFIG_SMP
1201 	seq_printf(f, "cpus active\t\t: %u\n"
1202 		      "cpu active mask\t\t: %016lx\n",
1203 		       num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]);
1204 #endif
1205 
1206 	show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1207 	show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1208 	show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1209 	show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1210 
1211 	return 0;
1212 }
1213 
1214 static int __init
read_mem_block(int * addr,int stride,int size)1215 read_mem_block(int *addr, int stride, int size)
1216 {
1217 	long nloads = size / stride, cnt, tmp;
1218 
1219 	__asm__ __volatile__(
1220 	"	rpcc    %0\n"
1221 	"1:	ldl	%3,0(%2)\n"
1222 	"	subq	%1,1,%1\n"
1223 	/* Next two XORs introduce an explicit data dependency between
1224 	   consecutive loads in the loop, which will give us true load
1225 	   latency. */
1226 	"	xor	%3,%2,%2\n"
1227 	"	xor	%3,%2,%2\n"
1228 	"	addq	%2,%4,%2\n"
1229 	"	bne	%1,1b\n"
1230 	"	rpcc	%3\n"
1231 	"	subl	%3,%0,%0\n"
1232 	: "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1233 	: "r" (stride), "1" (nloads), "2" (addr));
1234 
1235 	return cnt / (size / stride);
1236 }
1237 
1238 #define CSHAPE(totalsize, linesize, assoc) \
1239   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1240 
1241 /* ??? EV5 supports up to 64M, but did the systems with more than
1242    16M of BCACHE ever exist? */
1243 #define MAX_BCACHE_SIZE	16*1024*1024
1244 
1245 /* Note that the offchip caches are direct mapped on all Alphas. */
1246 static int __init
external_cache_probe(int minsize,int width)1247 external_cache_probe(int minsize, int width)
1248 {
1249 	int cycles, prev_cycles = 1000000;
1250 	int stride = 1 << width;
1251 	long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1252 
1253 	if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1254 		maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1255 
1256 	/* Get the first block cached. */
1257 	read_mem_block(__va(0), stride, size);
1258 
1259 	while (size < maxsize) {
1260 		/* Get an average load latency in cycles. */
1261 		cycles = read_mem_block(__va(0), stride, size);
1262 		if (cycles > prev_cycles * 2) {
1263 			/* Fine, we exceed the cache. */
1264 			printk("%ldK Bcache detected; load hit latency %d "
1265 			       "cycles, load miss latency %d cycles\n",
1266 			       size >> 11, prev_cycles, cycles);
1267 			return CSHAPE(size >> 1, width, 1);
1268 		}
1269 		/* Try to get the next block cached. */
1270 		read_mem_block(__va(size), stride, size);
1271 		prev_cycles = cycles;
1272 		size <<= 1;
1273 	}
1274 	return -1;	/* No BCACHE found. */
1275 }
1276 
1277 static void __init
determine_cpu_caches(unsigned int cpu_type)1278 determine_cpu_caches (unsigned int cpu_type)
1279 {
1280 	int L1I, L1D, L2, L3;
1281 
1282 	switch (cpu_type) {
1283 	case EV4_CPU:
1284 	case EV45_CPU:
1285 	  {
1286 		if (cpu_type == EV4_CPU)
1287 			L1I = CSHAPE(8*1024, 5, 1);
1288 		else
1289 			L1I = CSHAPE(16*1024, 5, 1);
1290 		L1D = L1I;
1291 		L3 = -1;
1292 
1293 		/* BIU_CTL is a write-only Abox register.  PALcode has a
1294 		   shadow copy, and may be available from some versions
1295 		   of the CSERVE PALcall.  If we can get it, then
1296 
1297 			unsigned long biu_ctl, size;
1298 			size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1299 			L2 = CSHAPE (size, 5, 1);
1300 
1301 		   Unfortunately, we can't rely on that.
1302 		*/
1303 		L2 = external_cache_probe(128*1024, 5);
1304 		break;
1305 	  }
1306 
1307 	case LCA4_CPU:
1308 	  {
1309 		unsigned long car, size;
1310 
1311 		L1I = L1D = CSHAPE(8*1024, 5, 1);
1312 		L3 = -1;
1313 
1314 		car = *(vuip) phys_to_virt (0x120000078UL);
1315 		size = 64*1024 * (1 << ((car >> 5) & 7));
1316 		/* No typo -- 8 byte cacheline size.  Whodathunk.  */
1317 		L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1318 		break;
1319 	  }
1320 
1321 	case EV5_CPU:
1322 	case EV56_CPU:
1323 	  {
1324 		unsigned long sc_ctl, width;
1325 
1326 		L1I = L1D = CSHAPE(8*1024, 5, 1);
1327 
1328 		/* Check the line size of the Scache.  */
1329 		sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1330 		width = sc_ctl & 0x1000 ? 6 : 5;
1331 		L2 = CSHAPE (96*1024, width, 3);
1332 
1333 		/* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1334 		   has a shadow copy, and may be available from some versions
1335 		   of the CSERVE PALcall.  If we can get it, then
1336 
1337 			unsigned long bc_control, bc_config, size;
1338 			size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1339 			L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1340 
1341 		   Unfortunately, we can't rely on that.
1342 		*/
1343 		L3 = external_cache_probe(1024*1024, width);
1344 		break;
1345 	  }
1346 
1347 	case PCA56_CPU:
1348 	case PCA57_CPU:
1349 	  {
1350 		if (cpu_type == PCA56_CPU) {
1351 			L1I = CSHAPE(16*1024, 6, 1);
1352 			L1D = CSHAPE(8*1024, 5, 1);
1353 		} else {
1354 			L1I = CSHAPE(32*1024, 6, 2);
1355 			L1D = CSHAPE(16*1024, 5, 1);
1356 		}
1357 		L3 = -1;
1358 
1359 #if 0
1360 		unsigned long cbox_config, size;
1361 
1362 		cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1363 		size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1364 
1365 		L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1366 #else
1367 		L2 = external_cache_probe(512*1024, 6);
1368 #endif
1369 		break;
1370 	  }
1371 
1372 	case EV6_CPU:
1373 	case EV67_CPU:
1374 	case EV68CB_CPU:
1375 	case EV68AL_CPU:
1376 	case EV68CX_CPU:
1377 	case EV69_CPU:
1378 		L1I = L1D = CSHAPE(64*1024, 6, 2);
1379 		L2 = external_cache_probe(1024*1024, 6);
1380 		L3 = -1;
1381 		break;
1382 
1383 	case EV7_CPU:
1384 	case EV79_CPU:
1385 		L1I = L1D = CSHAPE(64*1024, 6, 2);
1386 		L2 = CSHAPE(7*1024*1024/4, 6, 7);
1387 		L3 = -1;
1388 		break;
1389 
1390 	default:
1391 		/* Nothing known about this cpu type.  */
1392 		L1I = L1D = L2 = L3 = 0;
1393 		break;
1394 	}
1395 
1396 	alpha_l1i_cacheshape = L1I;
1397 	alpha_l1d_cacheshape = L1D;
1398 	alpha_l2_cacheshape = L2;
1399 	alpha_l3_cacheshape = L3;
1400 }
1401 
1402 /*
1403  * We show only CPU #0 info.
1404  */
1405 static void *
c_start(struct seq_file * f,loff_t * pos)1406 c_start(struct seq_file *f, loff_t *pos)
1407 {
1408 	return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1409 }
1410 
1411 static void *
c_next(struct seq_file * f,void * v,loff_t * pos)1412 c_next(struct seq_file *f, void *v, loff_t *pos)
1413 {
1414 	(*pos)++;
1415 	return NULL;
1416 }
1417 
1418 static void
c_stop(struct seq_file * f,void * v)1419 c_stop(struct seq_file *f, void *v)
1420 {
1421 }
1422 
1423 const struct seq_operations cpuinfo_op = {
1424 	.start	= c_start,
1425 	.next	= c_next,
1426 	.stop	= c_stop,
1427 	.show	= show_cpuinfo,
1428 };
1429 
1430 
1431 static int
alpha_panic_event(struct notifier_block * this,unsigned long event,void * ptr)1432 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1433 {
1434 #if 1
1435 	/* FIXME FIXME FIXME */
1436 	/* If we are using SRM and serial console, just hard halt here. */
1437 	if (alpha_using_srm && srmcons_output)
1438 		__halt();
1439 #endif
1440         return NOTIFY_DONE;
1441 }
1442 
add_pcspkr(void)1443 static __init int add_pcspkr(void)
1444 {
1445 	struct platform_device *pd;
1446 	int ret;
1447 
1448 	pd = platform_device_alloc("pcspkr", -1);
1449 	if (!pd)
1450 		return -ENOMEM;
1451 
1452 	ret = platform_device_add(pd);
1453 	if (ret)
1454 		platform_device_put(pd);
1455 
1456 	return ret;
1457 }
1458 device_initcall(add_pcspkr);
1459