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Linux/arch/alpha/kernel/setup.c

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  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/platform_device.h>
 32 #include <linux/memblock.h>
 33 #include <linux/pci.h>
 34 #include <linux/seq_file.h>
 35 #include <linux/root_dev.h>
 36 #include <linux/initrd.h>
 37 #include <linux/eisa.h>
 38 #include <linux/pfn.h>
 39 #ifdef CONFIG_MAGIC_SYSRQ
 40 #include <linux/sysrq.h>
 41 #include <linux/reboot.h>
 42 #endif
 43 #include <linux/notifier.h>
 44 #include <asm/setup.h>
 45 #include <asm/io.h>
 46 #include <linux/log2.h>
 47 #include <linux/export.h>
 48 
 49 extern struct atomic_notifier_head panic_notifier_list;
 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 #ifdef CONFIG_NUMA
 83 struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
 84 EXPORT_SYMBOL(node_to_cpumask_map);
 85 #endif
 86 
 87 /* Which processor we booted from.  */
 88 int boot_cpuid;
 89 
 90 /*
 91  * Using SRM callbacks for initial console output. This works from
 92  * setup_arch() time through the end of time_init(), as those places
 93  * are under our (Alpha) control.
 94 
 95  * "srmcons" specified in the boot command arguments allows us to
 96  * see kernel messages during the period of time before the true
 97  * console device is "registered" during console_init(). 
 98  * As of this version (2.5.59), console_init() will call
 99  * disable_early_printk() as the last action before initializing
100  * the console drivers. That's the last possible time srmcons can be 
101  * unregistered without interfering with console behavior.
102  *
103  * By default, OFF; set it with a bootcommand arg of "srmcons" or 
104  * "console=srm". The meaning of these two args is:
105  *     "srmcons"     - early callback prints 
106  *     "console=srm" - full callback based console, including early prints
107  */
108 int srmcons_output = 0;
109 
110 /* Enforce a memory size limit; useful for testing. By default, none. */
111 unsigned long mem_size_limit = 0;
112 
113 /* Set AGP GART window size (0 means disabled). */
114 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
115 
116 #ifdef CONFIG_ALPHA_GENERIC
117 struct alpha_machine_vector alpha_mv;
118 EXPORT_SYMBOL(alpha_mv);
119 #endif
120 
121 #ifndef alpha_using_srm
122 int alpha_using_srm;
123 EXPORT_SYMBOL(alpha_using_srm);
124 #endif
125 
126 #ifndef alpha_using_qemu
127 int alpha_using_qemu;
128 #endif
129 
130 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
131                                                unsigned long);
132 static struct alpha_machine_vector *get_sysvec_byname(const char *);
133 static void get_sysnames(unsigned long, unsigned long, unsigned long,
134                          char **, char **);
135 static void determine_cpu_caches (unsigned int);
136 
137 static char __initdata command_line[COMMAND_LINE_SIZE];
138 
139 /*
140  * The format of "screen_info" is strange, and due to early
141  * i386-setup code. This is just enough to make the console
142  * code think we're on a VGA color display.
143  */
144 
145 struct screen_info screen_info = {
146         .orig_x = 0,
147         .orig_y = 25,
148         .orig_video_cols = 80,
149         .orig_video_lines = 25,
150         .orig_video_isVGA = 1,
151         .orig_video_points = 16
152 };
153 
154 EXPORT_SYMBOL(screen_info);
155 
156 /*
157  * The direct map I/O window, if any.  This should be the same
158  * for all busses, since it's used by virt_to_bus.
159  */
160 
161 unsigned long __direct_map_base;
162 unsigned long __direct_map_size;
163 EXPORT_SYMBOL(__direct_map_base);
164 EXPORT_SYMBOL(__direct_map_size);
165 
166 /*
167  * Declare all of the machine vectors.
168  */
169 
170 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either 
171    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
172    to the assembler.  */
173 
174 #define WEAK(X) \
175         extern struct alpha_machine_vector X; \
176         asm(".weak "#X)
177 
178 WEAK(alcor_mv);
179 WEAK(alphabook1_mv);
180 WEAK(avanti_mv);
181 WEAK(cabriolet_mv);
182 WEAK(clipper_mv);
183 WEAK(dp264_mv);
184 WEAK(eb164_mv);
185 WEAK(eb64p_mv);
186 WEAK(eb66_mv);
187 WEAK(eb66p_mv);
188 WEAK(eiger_mv);
189 WEAK(jensen_mv);
190 WEAK(lx164_mv);
191 WEAK(lynx_mv);
192 WEAK(marvel_ev7_mv);
193 WEAK(miata_mv);
194 WEAK(mikasa_mv);
195 WEAK(mikasa_primo_mv);
196 WEAK(monet_mv);
197 WEAK(nautilus_mv);
198 WEAK(noname_mv);
199 WEAK(noritake_mv);
200 WEAK(noritake_primo_mv);
201 WEAK(p2k_mv);
202 WEAK(pc164_mv);
203 WEAK(privateer_mv);
204 WEAK(rawhide_mv);
205 WEAK(ruffian_mv);
206 WEAK(rx164_mv);
207 WEAK(sable_mv);
208 WEAK(sable_gamma_mv);
209 WEAK(shark_mv);
210 WEAK(sx164_mv);
211 WEAK(takara_mv);
212 WEAK(titan_mv);
213 WEAK(webbrick_mv);
214 WEAK(wildfire_mv);
215 WEAK(xl_mv);
216 WEAK(xlt_mv);
217 
218 #undef WEAK
219 
220 /*
221  * I/O resources inherited from PeeCees.  Except for perhaps the
222  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
223  *
224  * ??? If this becomes less standard, move the struct out into the
225  * machine vector.
226  */
227 
228 static void __init
229 reserve_std_resources(void)
230 {
231         static struct resource standard_io_resources[] = {
232                 { .name = "rtc", .start = -1, .end = -1 },
233                 { .name = "dma1", .start = 0x00, .end = 0x1f },
234                 { .name = "pic1", .start = 0x20, .end = 0x3f },
235                 { .name = "timer", .start = 0x40, .end = 0x5f },
236                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
237                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
238                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
239                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
240         };
241 
242         struct resource *io = &ioport_resource;
243         size_t i;
244 
245         if (hose_head) {
246                 struct pci_controller *hose;
247                 for (hose = hose_head; hose; hose = hose->next)
248                         if (hose->index == 0) {
249                                 io = hose->io_space;
250                                 break;
251                         }
252         }
253 
254         /* Fix up for the Jensen's queer RTC placement.  */
255         standard_io_resources[0].start = RTC_PORT(0);
256         standard_io_resources[0].end = RTC_PORT(0) + 0x0f;
257 
258         for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
259                 request_resource(io, standard_io_resources+i);
260 }
261 
262 #define PFN_MAX         PFN_DOWN(0x80000000)
263 #define for_each_mem_cluster(memdesc, _cluster, i)              \
264         for ((_cluster) = (memdesc)->cluster, (i) = 0;          \
265              (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
266 
267 static unsigned long __init
268 get_mem_size_limit(char *s)
269 {
270         unsigned long end = 0;
271         char *from = s;
272 
273         end = simple_strtoul(from, &from, 0);
274         if ( *from == 'K' || *from == 'k' ) {
275                 end = end << 10;
276                 from++;
277         } else if ( *from == 'M' || *from == 'm' ) {
278                 end = end << 20;
279                 from++;
280         } else if ( *from == 'G' || *from == 'g' ) {
281                 end = end << 30;
282                 from++;
283         }
284         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
285 }
286 
287 #ifdef CONFIG_BLK_DEV_INITRD
288 void * __init
289 move_initrd(unsigned long mem_limit)
290 {
291         void *start;
292         unsigned long size;
293 
294         size = initrd_end - initrd_start;
295         start = memblock_alloc(PAGE_ALIGN(size), PAGE_SIZE);
296         if (!start || __pa(start) + size > mem_limit) {
297                 initrd_start = initrd_end = 0;
298                 return NULL;
299         }
300         memmove(start, (void *)initrd_start, size);
301         initrd_start = (unsigned long)start;
302         initrd_end = initrd_start + size;
303         printk("initrd moved to %p\n", start);
304         return start;
305 }
306 #endif
307 
308 #ifndef CONFIG_DISCONTIGMEM
309 static void __init
310 setup_memory(void *kernel_end)
311 {
312         struct memclust_struct * cluster;
313         struct memdesc_struct * memdesc;
314         unsigned long kernel_size;
315         unsigned long i;
316 
317         /* Find free clusters, and init and free the bootmem accordingly.  */
318         memdesc = (struct memdesc_struct *)
319           (hwrpb->mddt_offset + (unsigned long) hwrpb);
320 
321         for_each_mem_cluster(memdesc, cluster, i) {
322                 unsigned long end;
323 
324                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
325                        i, cluster->usage, cluster->start_pfn,
326                        cluster->start_pfn + cluster->numpages);
327 
328                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
329                    non-volatile memory -- we might want to mark
330                    this for later.  */
331                 if (cluster->usage & 3)
332                         continue;
333 
334                 end = cluster->start_pfn + cluster->numpages;
335                 if (end > max_low_pfn)
336                         max_low_pfn = end;
337 
338                 memblock_add(PFN_PHYS(cluster->start_pfn),
339                              cluster->numpages << PAGE_SHIFT);
340         }
341 
342         /*
343          * Except for the NUMA systems (wildfire, marvel) all of the 
344          * Alpha systems we run on support 32GB of memory or less.
345          * Since the NUMA systems introduce large holes in memory addressing,
346          * we can get into a situation where there is not enough contiguous
347          * memory for the memory map. 
348          *
349          * Limit memory to the first 32GB to limit the NUMA systems to 
350          * memory on their first node (wildfire) or 2 (marvel) to avoid 
351          * not being able to produce the memory map. In order to access 
352          * all of the memory on the NUMA systems, build with discontiguous
353          * memory support.
354          *
355          * If the user specified a memory limit, let that memory limit stand.
356          */
357         if (!mem_size_limit) 
358                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
359 
360         if (mem_size_limit && max_low_pfn >= mem_size_limit)
361         {
362                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
363                        mem_size_limit << (PAGE_SHIFT - 10),
364                        max_low_pfn    << (PAGE_SHIFT - 10));
365                 max_low_pfn = mem_size_limit;
366         }
367 
368         /* Reserve the kernel memory. */
369         kernel_size = virt_to_phys(kernel_end) - KERNEL_START_PHYS;
370         memblock_reserve(KERNEL_START_PHYS, kernel_size);
371 
372 #ifdef CONFIG_BLK_DEV_INITRD
373         initrd_start = INITRD_START;
374         if (initrd_start) {
375                 initrd_end = initrd_start+INITRD_SIZE;
376                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
377                        (void *) initrd_start, INITRD_SIZE);
378 
379                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
380                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
381                                 printk("initrd extends beyond end of memory "
382                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
383                                        initrd_end,
384                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
385                 } else {
386                         memblock_reserve(virt_to_phys((void *)initrd_start),
387                                         INITRD_SIZE);
388                 }
389         }
390 #endif /* CONFIG_BLK_DEV_INITRD */
391 }
392 #else
393 extern void setup_memory(void *);
394 #endif /* !CONFIG_DISCONTIGMEM */
395 
396 int __init
397 page_is_ram(unsigned long pfn)
398 {
399         struct memclust_struct * cluster;
400         struct memdesc_struct * memdesc;
401         unsigned long i;
402 
403         memdesc = (struct memdesc_struct *)
404                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
405         for_each_mem_cluster(memdesc, cluster, i)
406         {
407                 if (pfn >= cluster->start_pfn  &&
408                     pfn < cluster->start_pfn + cluster->numpages) {
409                         return (cluster->usage & 3) ? 0 : 1;
410                 }
411         }
412 
413         return 0;
414 }
415 
416 static int __init
417 register_cpus(void)
418 {
419         int i;
420 
421         for_each_possible_cpu(i) {
422                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
423                 if (!p)
424                         return -ENOMEM;
425                 register_cpu(p, i);
426         }
427         return 0;
428 }
429 
430 arch_initcall(register_cpus);
431 
432 #ifdef CONFIG_MAGIC_SYSRQ
433 static void sysrq_reboot_handler(int unused)
434 {
435         machine_halt();
436 }
437 
438 static const struct sysrq_key_op srm_sysrq_reboot_op = {
439         .handler        = sysrq_reboot_handler,
440         .help_msg       = "reboot(b)",
441         .action_msg     = "Resetting",
442         .enable_mask    = SYSRQ_ENABLE_BOOT,
443 };
444 #endif
445 
446 void __init
447 setup_arch(char **cmdline_p)
448 {
449         extern char _end[];
450 
451         struct alpha_machine_vector *vec = NULL;
452         struct percpu_struct *cpu;
453         char *type_name, *var_name, *p;
454         void *kernel_end = _end; /* end of kernel */
455         char *args = command_line;
456 
457         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
458         boot_cpuid = hard_smp_processor_id();
459 
460         /*
461          * Pre-process the system type to make sure it will be valid.
462          *
463          * This may restore real CABRIO and EB66+ family names, ie
464          * EB64+ and EB66.
465          *
466          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
467          * and AS1200 (DIGITAL Server 5000 series) have the type as
468          * the negative of the real one.
469          */
470         if ((long)hwrpb->sys_type < 0) {
471                 hwrpb->sys_type = -((long)hwrpb->sys_type);
472                 hwrpb_update_checksum(hwrpb);
473         }
474 
475         /* Register a call for panic conditions. */
476         atomic_notifier_chain_register(&panic_notifier_list,
477                         &alpha_panic_block);
478 
479 #ifndef alpha_using_srm
480         /* Assume that we've booted from SRM if we haven't booted from MILO.
481            Detect the later by looking for "MILO" in the system serial nr.  */
482         alpha_using_srm = !str_has_prefix((const char *)hwrpb->ssn, "MILO");
483 #endif
484 #ifndef alpha_using_qemu
485         /* Similarly, look for QEMU.  */
486         alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0;
487 #endif
488 
489         /* If we are using SRM, we want to allow callbacks
490            as early as possible, so do this NOW, and then
491            they should work immediately thereafter.
492         */
493         kernel_end = callback_init(kernel_end);
494 
495         /* 
496          * Locate the command line.
497          */
498         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
499            boot flags depending on the boot mode, we need some shorthand.
500            This should do for installation.  */
501         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
502                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
503         } else {
504                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
505         }
506         strcpy(boot_command_line, command_line);
507         *cmdline_p = command_line;
508 
509         /* 
510          * Process command-line arguments.
511          */
512         while ((p = strsep(&args, " \t")) != NULL) {
513                 if (!*p) continue;
514                 if (strncmp(p, "alpha_mv=", 9) == 0) {
515                         vec = get_sysvec_byname(p+9);
516                         continue;
517                 }
518                 if (strncmp(p, "cycle=", 6) == 0) {
519                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
520                         continue;
521                 }
522                 if (strncmp(p, "mem=", 4) == 0) {
523                         mem_size_limit = get_mem_size_limit(p+4);
524                         continue;
525                 }
526                 if (strncmp(p, "srmcons", 7) == 0) {
527                         srmcons_output |= 1;
528                         continue;
529                 }
530                 if (strncmp(p, "console=srm", 11) == 0) {
531                         srmcons_output |= 2;
532                         continue;
533                 }
534                 if (strncmp(p, "gartsize=", 9) == 0) {
535                         alpha_agpgart_size =
536                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
537                         continue;
538                 }
539 #ifdef CONFIG_VERBOSE_MCHECK
540                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
541                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
542                         continue;
543                 }
544 #endif
545         }
546 
547         /* Replace the command line, now that we've killed it with strsep.  */
548         strcpy(command_line, boot_command_line);
549 
550         /* If we want SRM console printk echoing early, do it now. */
551         if (alpha_using_srm && srmcons_output) {
552                 register_srm_console();
553 
554                 /*
555                  * If "console=srm" was specified, clear the srmcons_output
556                  * flag now so that time.c won't unregister_srm_console
557                  */
558                 if (srmcons_output & 2)
559                         srmcons_output = 0;
560         }
561 
562 #ifdef CONFIG_MAGIC_SYSRQ
563         /* If we're using SRM, make sysrq-b halt back to the prom,
564            not auto-reboot.  */
565         if (alpha_using_srm) {
566                 unregister_sysrq_key('b', __sysrq_reboot_op);
567                 register_sysrq_key('b', &srm_sysrq_reboot_op);
568         }
569 #endif
570 
571         /*
572          * Identify and reconfigure for the current system.
573          */
574         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
575 
576         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
577                      cpu->type, &type_name, &var_name);
578         if (*var_name == '')
579                 var_name = "";
580 
581         if (!vec) {
582                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
583                                  cpu->type);
584         }
585 
586         if (!vec) {
587                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
588                       type_name, (*var_name ? " variation " : ""), var_name,
589                       hwrpb->sys_type, hwrpb->sys_variation);
590         }
591         if (vec != &alpha_mv) {
592                 alpha_mv = *vec;
593         }
594         
595         printk("Booting "
596 #ifdef CONFIG_ALPHA_GENERIC
597                "GENERIC "
598 #endif
599                "on %s%s%s using machine vector %s from %s\n",
600                type_name, (*var_name ? " variation " : ""),
601                var_name, alpha_mv.vector_name,
602                (alpha_using_srm ? "SRM" : "MILO"));
603 
604         printk("Major Options: "
605 #ifdef CONFIG_SMP
606                "SMP "
607 #endif
608 #ifdef CONFIG_ALPHA_EV56
609                "EV56 "
610 #endif
611 #ifdef CONFIG_ALPHA_EV67
612                "EV67 "
613 #endif
614 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
615                "LEGACY_START "
616 #endif
617 #ifdef CONFIG_VERBOSE_MCHECK
618                "VERBOSE_MCHECK "
619 #endif
620 
621 #ifdef CONFIG_DISCONTIGMEM
622                "DISCONTIGMEM "
623 #ifdef CONFIG_NUMA
624                "NUMA "
625 #endif
626 #endif
627 
628 #ifdef CONFIG_DEBUG_SPINLOCK
629                "DEBUG_SPINLOCK "
630 #endif
631 #ifdef CONFIG_MAGIC_SYSRQ
632                "MAGIC_SYSRQ "
633 #endif
634                "\n");
635 
636         printk("Command line: %s\n", command_line);
637 
638         /* 
639          * Sync up the HAE.
640          * Save the SRM's current value for restoration.
641          */
642         srm_hae = *alpha_mv.hae_register;
643         __set_hae(alpha_mv.hae_cache);
644 
645         /* Reset enable correctable error reports.  */
646         wrmces(0x7);
647 
648         /* Find our memory.  */
649         setup_memory(kernel_end);
650         memblock_set_bottom_up(true);
651         sparse_init();
652 
653         /* First guess at cpu cache sizes.  Do this before init_arch.  */
654         determine_cpu_caches(cpu->type);
655 
656         /* Initialize the machine.  Usually has to do with setting up
657            DMA windows and the like.  */
658         if (alpha_mv.init_arch)
659                 alpha_mv.init_arch();
660 
661         /* Reserve standard resources.  */
662         reserve_std_resources();
663 
664         /* 
665          * Give us a default console.  TGA users will see nothing until
666          * chr_dev_init is called, rather late in the boot sequence.
667          */
668 
669 #ifdef CONFIG_VT
670 #if defined(CONFIG_VGA_CONSOLE)
671         conswitchp = &vga_con;
672 #endif
673 #endif
674 
675         /* Default root filesystem to sda2.  */
676         ROOT_DEV = Root_SDA2;
677 
678 #ifdef CONFIG_EISA
679         /* FIXME:  only set this when we actually have EISA in this box? */
680         EISA_bus = 1;
681 #endif
682 
683         /*
684          * Check ASN in HWRPB for validity, report if bad.
685          * FIXME: how was this failing?  Should we trust it instead,
686          * and copy the value into alpha_mv.max_asn?
687          */
688 
689         if (hwrpb->max_asn != MAX_ASN) {
690                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
691         }
692 
693         /*
694          * Identify the flock of penguins.
695          */
696 
697 #ifdef CONFIG_SMP
698         setup_smp();
699 #endif
700         paging_init();
701 }
702 
703 static char sys_unknown[] = "Unknown";
704 static char systype_names[][16] = {
705         "",
706         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
707         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
708         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
709         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
710         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
711         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
712         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
713 };
714 
715 static char unofficial_names[][8] = {"100", "Ruffian"};
716 
717 static char api_names[][16] = {"200", "Nautilus"};
718 
719 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
720 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
721 
722 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
723 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
724 
725 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
726 static int eb64p_indices[] = {0,0,1,2};
727 
728 static char eb66_names[][8] = {"EB66", "EB66+"};
729 static int eb66_indices[] = {0,0,1};
730 
731 static char marvel_names[][16] = {
732         "Marvel/EV7"
733 };
734 static int marvel_indices[] = { 0 };
735 
736 static char rawhide_names[][16] = {
737         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
738 };
739 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
740 
741 static char titan_names[][16] = {
742         "DEFAULT", "Privateer", "Falcon", "Granite"
743 };
744 static int titan_indices[] = {0,1,2,2,3};
745 
746 static char tsunami_names[][16] = {
747         "", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
748         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
749         "Flying Clipper", "Shark"
750 };
751 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
752 
753 static struct alpha_machine_vector * __init
754 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
755 {
756         static struct alpha_machine_vector *systype_vecs[] __initdata =
757         {
758                 NULL,           /* 0 */
759                 NULL,           /* ADU */
760                 NULL,           /* Cobra */
761                 NULL,           /* Ruby */
762                 NULL,           /* Flamingo */
763                 NULL,           /* Mannequin */
764                 &jensen_mv,
765                 NULL,           /* Pelican */
766                 NULL,           /* Morgan */
767                 NULL,           /* Sable -- see below.  */
768                 NULL,           /* Medulla */
769                 &noname_mv,
770                 NULL,           /* Turbolaser */
771                 &avanti_mv,
772                 NULL,           /* Mustang */
773                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
774                 NULL,           /* Tradewind */
775                 NULL,           /* Mikasa -- see below.  */
776                 NULL,           /* EB64 */
777                 NULL,           /* EB66 -- see variation.  */
778                 NULL,           /* EB64+ -- see variation.  */
779                 &alphabook1_mv,
780                 &rawhide_mv,
781                 NULL,           /* K2 */
782                 &lynx_mv,       /* Lynx */
783                 &xl_mv,
784                 NULL,           /* EB164 -- see variation.  */
785                 NULL,           /* Noritake -- see below.  */
786                 NULL,           /* Cortex */
787                 NULL,           /* 29 */
788                 &miata_mv,
789                 NULL,           /* XXM */
790                 &takara_mv,
791                 NULL,           /* Yukon */
792                 NULL,           /* Tsunami -- see variation.  */
793                 &wildfire_mv,   /* Wildfire */
794                 NULL,           /* CUSCO */
795                 &eiger_mv,      /* Eiger */
796                 NULL,           /* Titan */
797                 NULL,           /* Marvel */
798         };
799 
800         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
801         {
802                 NULL,           /* 100 */
803                 &ruffian_mv,
804         };
805 
806         static struct alpha_machine_vector *api_vecs[] __initdata =
807         {
808                 NULL,           /* 200 */
809                 &nautilus_mv,
810         };
811 
812         static struct alpha_machine_vector *alcor_vecs[] __initdata = 
813         {
814                 &alcor_mv, &xlt_mv, &xlt_mv
815         };
816 
817         static struct alpha_machine_vector *eb164_vecs[] __initdata =
818         {
819                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
820         };
821 
822         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
823         {
824                 &eb64p_mv,
825                 &cabriolet_mv,
826                 &cabriolet_mv           /* AlphaPCI64 */
827         };
828 
829         static struct alpha_machine_vector *eb66_vecs[] __initdata =
830         {
831                 &eb66_mv,
832                 &eb66p_mv
833         };
834 
835         static struct alpha_machine_vector *marvel_vecs[] __initdata =
836         {
837                 &marvel_ev7_mv,
838         };
839 
840         static struct alpha_machine_vector *titan_vecs[] __initdata =
841         {
842                 &titan_mv,              /* default   */
843                 &privateer_mv,          /* privateer */
844                 &titan_mv,              /* falcon    */
845                 &privateer_mv,          /* granite   */
846         };
847 
848         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
849         {
850                 NULL,
851                 &dp264_mv,              /* dp264 */
852                 &dp264_mv,              /* warhol */
853                 &dp264_mv,              /* windjammer */
854                 &monet_mv,              /* monet */
855                 &clipper_mv,            /* clipper */
856                 &dp264_mv,              /* goldrush */
857                 &webbrick_mv,           /* webbrick */
858                 &dp264_mv,              /* catamaran */
859                 NULL,                   /* brisbane? */
860                 NULL,                   /* melbourne? */
861                 NULL,                   /* flying clipper? */
862                 &shark_mv,              /* shark */
863         };
864 
865         /* ??? Do we need to distinguish between Rawhides?  */
866 
867         struct alpha_machine_vector *vec;
868 
869         /* Search the system tables first... */
870         vec = NULL;
871         if (type < ARRAY_SIZE(systype_vecs)) {
872                 vec = systype_vecs[type];
873         } else if ((type > ST_API_BIAS) &&
874                    (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
875                 vec = api_vecs[type - ST_API_BIAS];
876         } else if ((type > ST_UNOFFICIAL_BIAS) &&
877                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
878                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
879         }
880 
881         /* If we've not found one, try for a variation.  */
882 
883         if (!vec) {
884                 /* Member ID is a bit-field. */
885                 unsigned long member = (variation >> 10) & 0x3f;
886 
887                 cpu &= 0xffffffff; /* make it usable */
888 
889                 switch (type) {
890                 case ST_DEC_ALCOR:
891                         if (member < ARRAY_SIZE(alcor_indices))
892                                 vec = alcor_vecs[alcor_indices[member]];
893                         break;
894                 case ST_DEC_EB164:
895                         if (member < ARRAY_SIZE(eb164_indices))
896                                 vec = eb164_vecs[eb164_indices[member]];
897                         /* PC164 may show as EB164 variation with EV56 CPU,
898                            but, since no true EB164 had anything but EV5... */
899                         if (vec == &eb164_mv && cpu == EV56_CPU)
900                                 vec = &pc164_mv;
901                         break;
902                 case ST_DEC_EB64P:
903                         if (member < ARRAY_SIZE(eb64p_indices))
904                                 vec = eb64p_vecs[eb64p_indices[member]];
905                         break;
906                 case ST_DEC_EB66:
907                         if (member < ARRAY_SIZE(eb66_indices))
908                                 vec = eb66_vecs[eb66_indices[member]];
909                         break;
910                 case ST_DEC_MARVEL:
911                         if (member < ARRAY_SIZE(marvel_indices))
912                                 vec = marvel_vecs[marvel_indices[member]];
913                         break;
914                 case ST_DEC_TITAN:
915                         vec = titan_vecs[0];    /* default */
916                         if (member < ARRAY_SIZE(titan_indices))
917                                 vec = titan_vecs[titan_indices[member]];
918                         break;
919                 case ST_DEC_TSUNAMI:
920                         if (member < ARRAY_SIZE(tsunami_indices))
921                                 vec = tsunami_vecs[tsunami_indices[member]];
922                         break;
923                 case ST_DEC_1000:
924                         if (cpu == EV5_CPU || cpu == EV56_CPU)
925                                 vec = &mikasa_primo_mv;
926                         else
927                                 vec = &mikasa_mv;
928                         break;
929                 case ST_DEC_NORITAKE:
930                         if (cpu == EV5_CPU || cpu == EV56_CPU)
931                                 vec = &noritake_primo_mv;
932                         else
933                                 vec = &noritake_mv;
934                         break;
935                 case ST_DEC_2100_A500:
936                         if (cpu == EV5_CPU || cpu == EV56_CPU)
937                                 vec = &sable_gamma_mv;
938                         else
939                                 vec = &sable_mv;
940                         break;
941                 }
942         }
943         return vec;
944 }
945 
946 static struct alpha_machine_vector * __init
947 get_sysvec_byname(const char *name)
948 {
949         static struct alpha_machine_vector *all_vecs[] __initdata =
950         {
951                 &alcor_mv,
952                 &alphabook1_mv,
953                 &avanti_mv,
954                 &cabriolet_mv,
955                 &clipper_mv,
956                 &dp264_mv,
957                 &eb164_mv,
958                 &eb64p_mv,
959                 &eb66_mv,
960                 &eb66p_mv,
961                 &eiger_mv,
962                 &jensen_mv,
963                 &lx164_mv,
964                 &lynx_mv,
965                 &miata_mv,
966                 &mikasa_mv,
967                 &mikasa_primo_mv,
968                 &monet_mv,
969                 &nautilus_mv,
970                 &noname_mv,
971                 &noritake_mv,
972                 &noritake_primo_mv,
973                 &p2k_mv,
974                 &pc164_mv,
975                 &privateer_mv,
976                 &rawhide_mv,
977                 &ruffian_mv,
978                 &rx164_mv,
979                 &sable_mv,
980                 &sable_gamma_mv,
981                 &shark_mv,
982                 &sx164_mv,
983                 &takara_mv,
984                 &webbrick_mv,
985                 &wildfire_mv,
986                 &xl_mv,
987                 &xlt_mv
988         };
989 
990         size_t i;
991 
992         for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
993                 struct alpha_machine_vector *mv = all_vecs[i];
994                 if (strcasecmp(mv->vector_name, name) == 0)
995                         return mv;
996         }
997         return NULL;
998 }
999 
1000 static void
1001 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1002              char **type_name, char **variation_name)
1003 {
1004         unsigned long member;
1005 
1006         /* If not in the tables, make it UNKNOWN,
1007            else set type name to family */
1008         if (type < ARRAY_SIZE(systype_names)) {
1009                 *type_name = systype_names[type];
1010         } else if ((type > ST_API_BIAS) &&
1011                    (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
1012                 *type_name = api_names[type - ST_API_BIAS];
1013         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1014                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1015                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1016         } else {
1017                 *type_name = sys_unknown;
1018                 *variation_name = sys_unknown;
1019                 return;
1020         }
1021 
1022         /* Set variation to ""; if variation is zero, done.  */
1023         *variation_name = systype_names[0];
1024         if (variation == 0) {
1025                 return;
1026         }
1027 
1028         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1029 
1030         cpu &= 0xffffffff; /* make it usable */
1031 
1032         switch (type) { /* select by family */
1033         default: /* default to variation "" for now */
1034                 break;
1035         case ST_DEC_EB164:
1036                 if (member >= ARRAY_SIZE(eb164_indices))
1037                         break;
1038                 *variation_name = eb164_names[eb164_indices[member]];
1039                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1040                    so, since no true EB164 had anything but EV5... */
1041                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1042                         *variation_name = eb164_names[1]; /* make it PC164 */
1043                 break;
1044         case ST_DEC_ALCOR:
1045                 if (member < ARRAY_SIZE(alcor_indices))
1046                         *variation_name = alcor_names[alcor_indices[member]];
1047                 break;
1048         case ST_DEC_EB64P:
1049                 if (member < ARRAY_SIZE(eb64p_indices))
1050                         *variation_name = eb64p_names[eb64p_indices[member]];
1051                 break;
1052         case ST_DEC_EB66:
1053                 if (member < ARRAY_SIZE(eb66_indices))
1054                         *variation_name = eb66_names[eb66_indices[member]];
1055                 break;
1056         case ST_DEC_MARVEL:
1057                 if (member < ARRAY_SIZE(marvel_indices))
1058                         *variation_name = marvel_names[marvel_indices[member]];
1059                 break;
1060         case ST_DEC_RAWHIDE:
1061                 if (member < ARRAY_SIZE(rawhide_indices))
1062                         *variation_name = rawhide_names[rawhide_indices[member]];
1063                 break;
1064         case ST_DEC_TITAN:
1065                 *variation_name = titan_names[0];       /* default */
1066                 if (member < ARRAY_SIZE(titan_indices))
1067                         *variation_name = titan_names[titan_indices[member]];
1068                 break;
1069         case ST_DEC_TSUNAMI:
1070                 if (member < ARRAY_SIZE(tsunami_indices))
1071                         *variation_name = tsunami_names[tsunami_indices[member]];
1072                 break;
1073         }
1074 }
1075 
1076 /*
1077  * A change was made to the HWRPB via an ECO and the following code
1078  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1079  * was not implemented in the console firmware.  If it's revision 5 or
1080  * greater we can get the name of the platform as an ASCII string from
1081  * the HWRPB.  That's what this function does.  It checks the revision
1082  * level and if the string is in the HWRPB it returns the address of
1083  * the string--a pointer to the name of the platform.
1084  *
1085  * Returns:
1086  *      - Pointer to a ASCII string if it's in the HWRPB
1087  *      - Pointer to a blank string if the data is not in the HWRPB.
1088  */
1089 
1090 static char *
1091 platform_string(void)
1092 {
1093         struct dsr_struct *dsr;
1094         static char unk_system_string[] = "N/A";
1095 
1096         /* Go to the console for the string pointer.
1097          * If the rpb_vers is not 5 or greater the rpb
1098          * is old and does not have this data in it.
1099          */
1100         if (hwrpb->revision < 5)
1101                 return (unk_system_string);
1102         else {
1103                 /* The Dynamic System Recognition struct
1104                  * has the system platform name starting
1105                  * after the character count of the string.
1106                  */
1107                 dsr =  ((struct dsr_struct *)
1108                         ((char *)hwrpb + hwrpb->dsr_offset));
1109                 return ((char *)dsr + (dsr->sysname_off +
1110                                        sizeof(long)));
1111         }
1112 }
1113 
1114 static int
1115 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1116 {
1117         struct percpu_struct *cpu;
1118         unsigned long i;
1119         int count = 0;
1120 
1121         for (i = 0; i < num; i++) {
1122                 cpu = (struct percpu_struct *)
1123                         ((char *)cpubase + i*hwrpb->processor_size);
1124                 if ((cpu->flags & 0x1cc) == 0x1cc)
1125                         count++;
1126         }
1127         return count;
1128 }
1129 
1130 static void
1131 show_cache_size (struct seq_file *f, const char *which, int shape)
1132 {
1133         if (shape == -1)
1134                 seq_printf (f, "%s\t\t: n/a\n", which);
1135         else if (shape == 0)
1136                 seq_printf (f, "%s\t\t: unknown\n", which);
1137         else
1138                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1139                             which, shape >> 10, shape & 15,
1140                             1 << ((shape >> 4) & 15));
1141 }
1142 
1143 static int
1144 show_cpuinfo(struct seq_file *f, void *slot)
1145 {
1146         extern struct unaligned_stat {
1147                 unsigned long count, va, pc;
1148         } unaligned[2];
1149 
1150         static char cpu_names[][8] = {
1151                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1152                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1153                 "EV68CX", "EV7", "EV79", "EV69"
1154         };
1155 
1156         struct percpu_struct *cpu = slot;
1157         unsigned int cpu_index;
1158         char *cpu_name;
1159         char *systype_name;
1160         char *sysvariation_name;
1161         int nr_processors;
1162         unsigned long timer_freq;
1163 
1164         cpu_index = (unsigned) (cpu->type - 1);
1165         cpu_name = "Unknown";
1166         if (cpu_index < ARRAY_SIZE(cpu_names))
1167                 cpu_name = cpu_names[cpu_index];
1168 
1169         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1170                      cpu->type, &systype_name, &sysvariation_name);
1171 
1172         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1173 
1174 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200
1175         timer_freq = (100UL * hwrpb->intr_freq) / 4096;
1176 #else
1177         timer_freq = 100UL * CONFIG_HZ;
1178 #endif
1179 
1180         seq_printf(f, "cpu\t\t\t: Alpha\n"
1181                       "cpu model\t\t: %s\n"
1182                       "cpu variation\t\t: %ld\n"
1183                       "cpu revision\t\t: %ld\n"
1184                       "cpu serial number\t: %s\n"
1185                       "system type\t\t: %s\n"
1186                       "system variation\t: %s\n"
1187                       "system revision\t\t: %ld\n"
1188                       "system serial number\t: %s\n"
1189                       "cycle frequency [Hz]\t: %lu %s\n"
1190                       "timer frequency [Hz]\t: %lu.%02lu\n"
1191                       "page size [bytes]\t: %ld\n"
1192                       "phys. address bits\t: %ld\n"
1193                       "max. addr. space #\t: %ld\n"
1194                       "BogoMIPS\t\t: %lu.%02lu\n"
1195                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1196                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1197                       "platform string\t\t: %s\n"
1198                       "cpus detected\t\t: %d\n",
1199                        cpu_name, cpu->variation, cpu->revision,
1200                        (char*)cpu->serial_no,
1201                        systype_name, sysvariation_name, hwrpb->sys_revision,
1202                        (char*)hwrpb->ssn,
1203                        est_cycle_freq ? : hwrpb->cycle_freq,
1204                        est_cycle_freq ? "est." : "",
1205                        timer_freq / 100, timer_freq % 100,
1206                        hwrpb->pagesize,
1207                        hwrpb->pa_bits,
1208                        hwrpb->max_asn,
1209                        loops_per_jiffy / (500000/HZ),
1210                        (loops_per_jiffy / (5000/HZ)) % 100,
1211                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1212                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1213                        platform_string(), nr_processors);
1214 
1215 #ifdef CONFIG_SMP
1216         seq_printf(f, "cpus active\t\t: %u\n"
1217                       "cpu active mask\t\t: %016lx\n",
1218                        num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]);
1219 #endif
1220 
1221         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1222         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1223         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1224         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1225 
1226         return 0;
1227 }
1228 
1229 static int __init
1230 read_mem_block(int *addr, int stride, int size)
1231 {
1232         long nloads = size / stride, cnt, tmp;
1233 
1234         __asm__ __volatile__(
1235         "       rpcc    %0\n"
1236         "1:     ldl     %3,0(%2)\n"
1237         "       subq    %1,1,%1\n"
1238         /* Next two XORs introduce an explicit data dependency between
1239            consecutive loads in the loop, which will give us true load
1240            latency. */
1241         "       xor     %3,%2,%2\n"
1242         "       xor     %3,%2,%2\n"
1243         "       addq    %2,%4,%2\n"
1244         "       bne     %1,1b\n"
1245         "       rpcc    %3\n"
1246         "       subl    %3,%0,%0\n"
1247         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1248         : "r" (stride), "1" (nloads), "2" (addr));
1249 
1250         return cnt / (size / stride);
1251 }
1252 
1253 #define CSHAPE(totalsize, linesize, assoc) \
1254   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1255 
1256 /* ??? EV5 supports up to 64M, but did the systems with more than
1257    16M of BCACHE ever exist? */
1258 #define MAX_BCACHE_SIZE 16*1024*1024
1259 
1260 /* Note that the offchip caches are direct mapped on all Alphas. */
1261 static int __init
1262 external_cache_probe(int minsize, int width)
1263 {
1264         int cycles, prev_cycles = 1000000;
1265         int stride = 1 << width;
1266         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1267 
1268         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1269                 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1270 
1271         /* Get the first block cached. */
1272         read_mem_block(__va(0), stride, size);
1273 
1274         while (size < maxsize) {
1275                 /* Get an average load latency in cycles. */
1276                 cycles = read_mem_block(__va(0), stride, size);
1277                 if (cycles > prev_cycles * 2) {
1278                         /* Fine, we exceed the cache. */
1279                         printk("%ldK Bcache detected; load hit latency %d "
1280                                "cycles, load miss latency %d cycles\n",
1281                                size >> 11, prev_cycles, cycles);
1282                         return CSHAPE(size >> 1, width, 1);
1283                 }
1284                 /* Try to get the next block cached. */
1285                 read_mem_block(__va(size), stride, size);
1286                 prev_cycles = cycles;
1287                 size <<= 1;
1288         }
1289         return -1;      /* No BCACHE found. */
1290 }
1291 
1292 static void __init
1293 determine_cpu_caches (unsigned int cpu_type)
1294 {
1295         int L1I, L1D, L2, L3;
1296 
1297         switch (cpu_type) {
1298         case EV4_CPU:
1299         case EV45_CPU:
1300           {
1301                 if (cpu_type == EV4_CPU)
1302                         L1I = CSHAPE(8*1024, 5, 1);
1303                 else
1304                         L1I = CSHAPE(16*1024, 5, 1);
1305                 L1D = L1I;
1306                 L3 = -1;
1307         
1308                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1309                    shadow copy, and may be available from some versions
1310                    of the CSERVE PALcall.  If we can get it, then
1311 
1312                         unsigned long biu_ctl, size;
1313                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1314                         L2 = CSHAPE (size, 5, 1);
1315 
1316                    Unfortunately, we can't rely on that.
1317                 */
1318                 L2 = external_cache_probe(128*1024, 5);
1319                 break;
1320           }
1321 
1322         case LCA4_CPU:
1323           {
1324                 unsigned long car, size;
1325 
1326                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1327                 L3 = -1;
1328 
1329                 car = *(vuip) phys_to_virt (0x120000078UL);
1330                 size = 64*1024 * (1 << ((car >> 5) & 7));
1331                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1332                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1333                 break;
1334           }
1335 
1336         case EV5_CPU:
1337         case EV56_CPU:
1338           {
1339                 unsigned long sc_ctl, width;
1340 
1341                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1342 
1343                 /* Check the line size of the Scache.  */
1344                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1345                 width = sc_ctl & 0x1000 ? 6 : 5;
1346                 L2 = CSHAPE (96*1024, width, 3);
1347 
1348                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1349                    has a shadow copy, and may be available from some versions
1350                    of the CSERVE PALcall.  If we can get it, then
1351 
1352                         unsigned long bc_control, bc_config, size;
1353                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1354                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1355 
1356                    Unfortunately, we can't rely on that.
1357                 */
1358                 L3 = external_cache_probe(1024*1024, width);
1359                 break;
1360           }
1361 
1362         case PCA56_CPU:
1363         case PCA57_CPU:
1364           {
1365                 if (cpu_type == PCA56_CPU) {
1366                         L1I = CSHAPE(16*1024, 6, 1);
1367                         L1D = CSHAPE(8*1024, 5, 1);
1368                 } else {
1369                         L1I = CSHAPE(32*1024, 6, 2);
1370                         L1D = CSHAPE(16*1024, 5, 1);
1371                 }
1372                 L3 = -1;
1373 
1374 #if 0
1375                 unsigned long cbox_config, size;
1376 
1377                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1378                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1379 
1380                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1381 #else
1382                 L2 = external_cache_probe(512*1024, 6);
1383 #endif
1384                 break;
1385           }
1386 
1387         case EV6_CPU:
1388         case EV67_CPU:
1389         case EV68CB_CPU:
1390         case EV68AL_CPU:
1391         case EV68CX_CPU:
1392         case EV69_CPU:
1393                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1394                 L2 = external_cache_probe(1024*1024, 6);
1395                 L3 = -1;
1396                 break;
1397 
1398         case EV7_CPU:
1399         case EV79_CPU:
1400                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1401                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1402                 L3 = -1;
1403                 break;
1404 
1405         default:
1406                 /* Nothing known about this cpu type.  */
1407                 L1I = L1D = L2 = L3 = 0;
1408                 break;
1409         }
1410 
1411         alpha_l1i_cacheshape = L1I;
1412         alpha_l1d_cacheshape = L1D;
1413         alpha_l2_cacheshape = L2;
1414         alpha_l3_cacheshape = L3;
1415 }
1416 
1417 /*
1418  * We show only CPU #0 info.
1419  */
1420 static void *
1421 c_start(struct seq_file *f, loff_t *pos)
1422 {
1423         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1424 }
1425 
1426 static void *
1427 c_next(struct seq_file *f, void *v, loff_t *pos)
1428 {
1429         (*pos)++;
1430         return NULL;
1431 }
1432 
1433 static void
1434 c_stop(struct seq_file *f, void *v)
1435 {
1436 }
1437 
1438 const struct seq_operations cpuinfo_op = {
1439         .start  = c_start,
1440         .next   = c_next,
1441         .stop   = c_stop,
1442         .show   = show_cpuinfo,
1443 };
1444 
1445 
1446 static int
1447 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1448 {
1449 #if 1
1450         /* FIXME FIXME FIXME */
1451         /* If we are using SRM and serial console, just hard halt here. */
1452         if (alpha_using_srm && srmcons_output)
1453                 __halt();
1454 #endif
1455         return NOTIFY_DONE;
1456 }
1457 
1458 static __init int add_pcspkr(void)
1459 {
1460         struct platform_device *pd;
1461         int ret;
1462 
1463         pd = platform_device_alloc("pcspkr", -1);
1464         if (!pd)
1465                 return -ENOMEM;
1466 
1467         ret = platform_device_add(pd);
1468         if (ret)
1469                 platform_device_put(pd);
1470 
1471         return ret;
1472 }
1473 device_initcall(add_pcspkr);
1474 

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