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TOMOYO Linux Cross Reference
Linux/arch/alpha/kernel/setup.c

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  1 /*
  2  *  linux/arch/alpha/kernel/setup.c
  3  *
  4  *  Copyright (C) 1995  Linus Torvalds
  5  */
  6 
  7 /* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
  8 
  9 /*
 10  * Bootup setup stuff.
 11  */
 12 
 13 #include <linux/sched.h>
 14 #include <linux/kernel.h>
 15 #include <linux/mm.h>
 16 #include <linux/stddef.h>
 17 #include <linux/unistd.h>
 18 #include <linux/ptrace.h>
 19 #include <linux/slab.h>
 20 #include <linux/user.h>
 21 #include <linux/screen_info.h>
 22 #include <linux/delay.h>
 23 #include <linux/mc146818rtc.h>
 24 #include <linux/console.h>
 25 #include <linux/cpu.h>
 26 #include <linux/errno.h>
 27 #include <linux/init.h>
 28 #include <linux/string.h>
 29 #include <linux/ioport.h>
 30 #include <linux/platform_device.h>
 31 #include <linux/bootmem.h>
 32 #include <linux/pci.h>
 33 #include <linux/seq_file.h>
 34 #include <linux/root_dev.h>
 35 #include <linux/initrd.h>
 36 #include <linux/eisa.h>
 37 #include <linux/pfn.h>
 38 #ifdef CONFIG_MAGIC_SYSRQ
 39 #include <linux/sysrq.h>
 40 #include <linux/reboot.h>
 41 #endif
 42 #include <linux/notifier.h>
 43 #include <asm/setup.h>
 44 #include <asm/io.h>
 45 #include <linux/log2.h>
 46 #include <linux/export.h>
 47 
 48 extern struct atomic_notifier_head panic_notifier_list;
 49 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
 50 static struct notifier_block alpha_panic_block = {
 51         alpha_panic_event,
 52         NULL,
 53         INT_MAX /* try to do it first */
 54 };
 55 
 56 #include <asm/uaccess.h>
 57 #include <asm/pgtable.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 #endif
119 
120 #ifndef alpha_using_srm
121 int alpha_using_srm;
122 EXPORT_SYMBOL(alpha_using_srm);
123 #endif
124 
125 #ifndef alpha_using_qemu
126 int alpha_using_qemu;
127 #endif
128 
129 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
130                                                unsigned long);
131 static struct alpha_machine_vector *get_sysvec_byname(const char *);
132 static void get_sysnames(unsigned long, unsigned long, unsigned long,
133                          char **, char **);
134 static void determine_cpu_caches (unsigned int);
135 
136 static char __initdata command_line[COMMAND_LINE_SIZE];
137 
138 /*
139  * The format of "screen_info" is strange, and due to early
140  * i386-setup code. This is just enough to make the console
141  * code think we're on a VGA color display.
142  */
143 
144 struct screen_info screen_info = {
145         .orig_x = 0,
146         .orig_y = 25,
147         .orig_video_cols = 80,
148         .orig_video_lines = 25,
149         .orig_video_isVGA = 1,
150         .orig_video_points = 16
151 };
152 
153 EXPORT_SYMBOL(screen_info);
154 
155 /*
156  * The direct map I/O window, if any.  This should be the same
157  * for all busses, since it's used by virt_to_bus.
158  */
159 
160 unsigned long __direct_map_base;
161 unsigned long __direct_map_size;
162 EXPORT_SYMBOL(__direct_map_base);
163 EXPORT_SYMBOL(__direct_map_size);
164 
165 /*
166  * Declare all of the machine vectors.
167  */
168 
169 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either 
170    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
171    to the assembler.  */
172 
173 #define WEAK(X) \
174         extern struct alpha_machine_vector X; \
175         asm(".weak "#X)
176 
177 WEAK(alcor_mv);
178 WEAK(alphabook1_mv);
179 WEAK(avanti_mv);
180 WEAK(cabriolet_mv);
181 WEAK(clipper_mv);
182 WEAK(dp264_mv);
183 WEAK(eb164_mv);
184 WEAK(eb64p_mv);
185 WEAK(eb66_mv);
186 WEAK(eb66p_mv);
187 WEAK(eiger_mv);
188 WEAK(jensen_mv);
189 WEAK(lx164_mv);
190 WEAK(lynx_mv);
191 WEAK(marvel_ev7_mv);
192 WEAK(miata_mv);
193 WEAK(mikasa_mv);
194 WEAK(mikasa_primo_mv);
195 WEAK(monet_mv);
196 WEAK(nautilus_mv);
197 WEAK(noname_mv);
198 WEAK(noritake_mv);
199 WEAK(noritake_primo_mv);
200 WEAK(p2k_mv);
201 WEAK(pc164_mv);
202 WEAK(privateer_mv);
203 WEAK(rawhide_mv);
204 WEAK(ruffian_mv);
205 WEAK(rx164_mv);
206 WEAK(sable_mv);
207 WEAK(sable_gamma_mv);
208 WEAK(shark_mv);
209 WEAK(sx164_mv);
210 WEAK(takara_mv);
211 WEAK(titan_mv);
212 WEAK(webbrick_mv);
213 WEAK(wildfire_mv);
214 WEAK(xl_mv);
215 WEAK(xlt_mv);
216 
217 #undef WEAK
218 
219 /*
220  * I/O resources inherited from PeeCees.  Except for perhaps the
221  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
222  *
223  * ??? If this becomes less standard, move the struct out into the
224  * machine vector.
225  */
226 
227 static void __init
228 reserve_std_resources(void)
229 {
230         static struct resource standard_io_resources[] = {
231                 { .name = "rtc", .start = -1, .end = -1 },
232                 { .name = "dma1", .start = 0x00, .end = 0x1f },
233                 { .name = "pic1", .start = 0x20, .end = 0x3f },
234                 { .name = "timer", .start = 0x40, .end = 0x5f },
235                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
236                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
237                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
238                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
239         };
240 
241         struct resource *io = &ioport_resource;
242         size_t i;
243 
244         if (hose_head) {
245                 struct pci_controller *hose;
246                 for (hose = hose_head; hose; hose = hose->next)
247                         if (hose->index == 0) {
248                                 io = hose->io_space;
249                                 break;
250                         }
251         }
252 
253         /* Fix up for the Jensen's queer RTC placement.  */
254         standard_io_resources[0].start = RTC_PORT(0);
255         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
256 
257         for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
258                 request_resource(io, standard_io_resources+i);
259 }
260 
261 #define PFN_MAX         PFN_DOWN(0x80000000)
262 #define for_each_mem_cluster(memdesc, _cluster, i)              \
263         for ((_cluster) = (memdesc)->cluster, (i) = 0;          \
264              (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
265 
266 static unsigned long __init
267 get_mem_size_limit(char *s)
268 {
269         unsigned long end = 0;
270         char *from = s;
271 
272         end = simple_strtoul(from, &from, 0);
273         if ( *from == 'K' || *from == 'k' ) {
274                 end = end << 10;
275                 from++;
276         } else if ( *from == 'M' || *from == 'm' ) {
277                 end = end << 20;
278                 from++;
279         } else if ( *from == 'G' || *from == 'g' ) {
280                 end = end << 30;
281                 from++;
282         }
283         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
284 }
285 
286 #ifdef CONFIG_BLK_DEV_INITRD
287 void * __init
288 move_initrd(unsigned long mem_limit)
289 {
290         void *start;
291         unsigned long size;
292 
293         size = initrd_end - initrd_start;
294         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
295         if (!start || __pa(start) + size > mem_limit) {
296                 initrd_start = initrd_end = 0;
297                 return NULL;
298         }
299         memmove(start, (void *)initrd_start, size);
300         initrd_start = (unsigned long)start;
301         initrd_end = initrd_start + size;
302         printk("initrd moved to %p\n", start);
303         return start;
304 }
305 #endif
306 
307 #ifndef CONFIG_DISCONTIGMEM
308 static void __init
309 setup_memory(void *kernel_end)
310 {
311         struct memclust_struct * cluster;
312         struct memdesc_struct * memdesc;
313         unsigned long start_kernel_pfn, end_kernel_pfn;
314         unsigned long bootmap_size, bootmap_pages, bootmap_start;
315         unsigned long start, end;
316         unsigned long i;
317 
318         /* Find free clusters, and init and free the bootmem accordingly.  */
319         memdesc = (struct memdesc_struct *)
320           (hwrpb->mddt_offset + (unsigned long) hwrpb);
321 
322         for_each_mem_cluster(memdesc, cluster, i) {
323                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
324                        i, cluster->usage, cluster->start_pfn,
325                        cluster->start_pfn + cluster->numpages);
326 
327                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
328                    non-volatile memory -- we might want to mark
329                    this for later.  */
330                 if (cluster->usage & 3)
331                         continue;
332 
333                 end = cluster->start_pfn + cluster->numpages;
334                 if (end > max_low_pfn)
335                         max_low_pfn = end;
336         }
337 
338         /*
339          * Except for the NUMA systems (wildfire, marvel) all of the 
340          * Alpha systems we run on support 32GB of memory or less.
341          * Since the NUMA systems introduce large holes in memory addressing,
342          * we can get into a situation where there is not enough contiguous
343          * memory for the memory map. 
344          *
345          * Limit memory to the first 32GB to limit the NUMA systems to 
346          * memory on their first node (wildfire) or 2 (marvel) to avoid 
347          * not being able to produce the memory map. In order to access 
348          * all of the memory on the NUMA systems, build with discontiguous
349          * memory support.
350          *
351          * If the user specified a memory limit, let that memory limit stand.
352          */
353         if (!mem_size_limit) 
354                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
355 
356         if (mem_size_limit && max_low_pfn >= mem_size_limit)
357         {
358                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
359                        mem_size_limit << (PAGE_SHIFT - 10),
360                        max_low_pfn    << (PAGE_SHIFT - 10));
361                 max_low_pfn = mem_size_limit;
362         }
363 
364         /* Find the bounds of kernel memory.  */
365         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
366         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
367         bootmap_start = -1;
368 
369  try_again:
370         if (max_low_pfn <= end_kernel_pfn)
371                 panic("not enough memory to boot");
372 
373         /* We need to know how many physically contiguous pages
374            we'll need for the bootmap.  */
375         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
376 
377         /* Now find a good region where to allocate the bootmap.  */
378         for_each_mem_cluster(memdesc, cluster, i) {
379                 if (cluster->usage & 3)
380                         continue;
381 
382                 start = cluster->start_pfn;
383                 end = start + cluster->numpages;
384                 if (start >= max_low_pfn)
385                         continue;
386                 if (end > max_low_pfn)
387                         end = max_low_pfn;
388                 if (start < start_kernel_pfn) {
389                         if (end > end_kernel_pfn
390                             && end - end_kernel_pfn >= bootmap_pages) {
391                                 bootmap_start = end_kernel_pfn;
392                                 break;
393                         } else if (end > start_kernel_pfn)
394                                 end = start_kernel_pfn;
395                 } else if (start < end_kernel_pfn)
396                         start = end_kernel_pfn;
397                 if (end - start >= bootmap_pages) {
398                         bootmap_start = start;
399                         break;
400                 }
401         }
402 
403         if (bootmap_start == ~0UL) {
404                 max_low_pfn >>= 1;
405                 goto try_again;
406         }
407 
408         /* Allocate the bootmap and mark the whole MM as reserved.  */
409         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
410 
411         /* Mark the free regions.  */
412         for_each_mem_cluster(memdesc, cluster, i) {
413                 if (cluster->usage & 3)
414                         continue;
415 
416                 start = cluster->start_pfn;
417                 end = cluster->start_pfn + cluster->numpages;
418                 if (start >= max_low_pfn)
419                         continue;
420                 if (end > max_low_pfn)
421                         end = max_low_pfn;
422                 if (start < start_kernel_pfn) {
423                         if (end > end_kernel_pfn) {
424                                 free_bootmem(PFN_PHYS(start),
425                                              (PFN_PHYS(start_kernel_pfn)
426                                               - PFN_PHYS(start)));
427                                 printk("freeing pages %ld:%ld\n",
428                                        start, start_kernel_pfn);
429                                 start = end_kernel_pfn;
430                         } else if (end > start_kernel_pfn)
431                                 end = start_kernel_pfn;
432                 } else if (start < end_kernel_pfn)
433                         start = end_kernel_pfn;
434                 if (start >= end)
435                         continue;
436 
437                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
438                 printk("freeing pages %ld:%ld\n", start, end);
439         }
440 
441         /* Reserve the bootmap memory.  */
442         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size,
443                         BOOTMEM_DEFAULT);
444         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
445 
446 #ifdef CONFIG_BLK_DEV_INITRD
447         initrd_start = INITRD_START;
448         if (initrd_start) {
449                 initrd_end = initrd_start+INITRD_SIZE;
450                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
451                        (void *) initrd_start, INITRD_SIZE);
452 
453                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
454                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
455                                 printk("initrd extends beyond end of memory "
456                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
457                                        initrd_end,
458                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
459                 } else {
460                         reserve_bootmem(virt_to_phys((void *)initrd_start),
461                                         INITRD_SIZE, BOOTMEM_DEFAULT);
462                 }
463         }
464 #endif /* CONFIG_BLK_DEV_INITRD */
465 }
466 #else
467 extern void setup_memory(void *);
468 #endif /* !CONFIG_DISCONTIGMEM */
469 
470 int __init
471 page_is_ram(unsigned long pfn)
472 {
473         struct memclust_struct * cluster;
474         struct memdesc_struct * memdesc;
475         unsigned long i;
476 
477         memdesc = (struct memdesc_struct *)
478                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
479         for_each_mem_cluster(memdesc, cluster, i)
480         {
481                 if (pfn >= cluster->start_pfn  &&
482                     pfn < cluster->start_pfn + cluster->numpages) {
483                         return (cluster->usage & 3) ? 0 : 1;
484                 }
485         }
486 
487         return 0;
488 }
489 
490 static int __init
491 register_cpus(void)
492 {
493         int i;
494 
495         for_each_possible_cpu(i) {
496                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
497                 if (!p)
498                         return -ENOMEM;
499                 register_cpu(p, i);
500         }
501         return 0;
502 }
503 
504 arch_initcall(register_cpus);
505 
506 void __init
507 setup_arch(char **cmdline_p)
508 {
509         extern char _end[];
510 
511         struct alpha_machine_vector *vec = NULL;
512         struct percpu_struct *cpu;
513         char *type_name, *var_name, *p;
514         void *kernel_end = _end; /* end of kernel */
515         char *args = command_line;
516 
517         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
518         boot_cpuid = hard_smp_processor_id();
519 
520         /*
521          * Pre-process the system type to make sure it will be valid.
522          *
523          * This may restore real CABRIO and EB66+ family names, ie
524          * EB64+ and EB66.
525          *
526          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
527          * and AS1200 (DIGITAL Server 5000 series) have the type as
528          * the negative of the real one.
529          */
530         if ((long)hwrpb->sys_type < 0) {
531                 hwrpb->sys_type = -((long)hwrpb->sys_type);
532                 hwrpb_update_checksum(hwrpb);
533         }
534 
535         /* Register a call for panic conditions. */
536         atomic_notifier_chain_register(&panic_notifier_list,
537                         &alpha_panic_block);
538 
539 #ifndef alpha_using_srm
540         /* Assume that we've booted from SRM if we haven't booted from MILO.
541            Detect the later by looking for "MILO" in the system serial nr.  */
542         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
543 #endif
544 #ifndef alpha_using_qemu
545         /* Similarly, look for QEMU.  */
546         alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0;
547 #endif
548 
549         /* If we are using SRM, we want to allow callbacks
550            as early as possible, so do this NOW, and then
551            they should work immediately thereafter.
552         */
553         kernel_end = callback_init(kernel_end);
554 
555         /* 
556          * Locate the command line.
557          */
558         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
559            boot flags depending on the boot mode, we need some shorthand.
560            This should do for installation.  */
561         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
562                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
563         } else {
564                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
565         }
566         strcpy(boot_command_line, command_line);
567         *cmdline_p = command_line;
568 
569         /* 
570          * Process command-line arguments.
571          */
572         while ((p = strsep(&args, " \t")) != NULL) {
573                 if (!*p) continue;
574                 if (strncmp(p, "alpha_mv=", 9) == 0) {
575                         vec = get_sysvec_byname(p+9);
576                         continue;
577                 }
578                 if (strncmp(p, "cycle=", 6) == 0) {
579                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
580                         continue;
581                 }
582                 if (strncmp(p, "mem=", 4) == 0) {
583                         mem_size_limit = get_mem_size_limit(p+4);
584                         continue;
585                 }
586                 if (strncmp(p, "srmcons", 7) == 0) {
587                         srmcons_output |= 1;
588                         continue;
589                 }
590                 if (strncmp(p, "console=srm", 11) == 0) {
591                         srmcons_output |= 2;
592                         continue;
593                 }
594                 if (strncmp(p, "gartsize=", 9) == 0) {
595                         alpha_agpgart_size =
596                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
597                         continue;
598                 }
599 #ifdef CONFIG_VERBOSE_MCHECK
600                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
601                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
602                         continue;
603                 }
604 #endif
605         }
606 
607         /* Replace the command line, now that we've killed it with strsep.  */
608         strcpy(command_line, boot_command_line);
609 
610         /* If we want SRM console printk echoing early, do it now. */
611         if (alpha_using_srm && srmcons_output) {
612                 register_srm_console();
613 
614                 /*
615                  * If "console=srm" was specified, clear the srmcons_output
616                  * flag now so that time.c won't unregister_srm_console
617                  */
618                 if (srmcons_output & 2)
619                         srmcons_output = 0;
620         }
621 
622 #ifdef CONFIG_MAGIC_SYSRQ
623         /* If we're using SRM, make sysrq-b halt back to the prom,
624            not auto-reboot.  */
625         if (alpha_using_srm) {
626                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
627                 op->handler = (void *) machine_halt;
628         }
629 #endif
630 
631         /*
632          * Identify and reconfigure for the current system.
633          */
634         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
635 
636         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
637                      cpu->type, &type_name, &var_name);
638         if (*var_name == '')
639                 var_name = "";
640 
641         if (!vec) {
642                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
643                                  cpu->type);
644         }
645 
646         if (!vec) {
647                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
648                       type_name, (*var_name ? " variation " : ""), var_name,
649                       hwrpb->sys_type, hwrpb->sys_variation);
650         }
651         if (vec != &alpha_mv) {
652                 alpha_mv = *vec;
653         }
654         
655         printk("Booting "
656 #ifdef CONFIG_ALPHA_GENERIC
657                "GENERIC "
658 #endif
659                "on %s%s%s using machine vector %s from %s\n",
660                type_name, (*var_name ? " variation " : ""),
661                var_name, alpha_mv.vector_name,
662                (alpha_using_srm ? "SRM" : "MILO"));
663 
664         printk("Major Options: "
665 #ifdef CONFIG_SMP
666                "SMP "
667 #endif
668 #ifdef CONFIG_ALPHA_EV56
669                "EV56 "
670 #endif
671 #ifdef CONFIG_ALPHA_EV67
672                "EV67 "
673 #endif
674 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
675                "LEGACY_START "
676 #endif
677 #ifdef CONFIG_VERBOSE_MCHECK
678                "VERBOSE_MCHECK "
679 #endif
680 
681 #ifdef CONFIG_DISCONTIGMEM
682                "DISCONTIGMEM "
683 #ifdef CONFIG_NUMA
684                "NUMA "
685 #endif
686 #endif
687 
688 #ifdef CONFIG_DEBUG_SPINLOCK
689                "DEBUG_SPINLOCK "
690 #endif
691 #ifdef CONFIG_MAGIC_SYSRQ
692                "MAGIC_SYSRQ "
693 #endif
694                "\n");
695 
696         printk("Command line: %s\n", command_line);
697 
698         /* 
699          * Sync up the HAE.
700          * Save the SRM's current value for restoration.
701          */
702         srm_hae = *alpha_mv.hae_register;
703         __set_hae(alpha_mv.hae_cache);
704 
705         /* Reset enable correctable error reports.  */
706         wrmces(0x7);
707 
708         /* Find our memory.  */
709         setup_memory(kernel_end);
710 
711         /* First guess at cpu cache sizes.  Do this before init_arch.  */
712         determine_cpu_caches(cpu->type);
713 
714         /* Initialize the machine.  Usually has to do with setting up
715            DMA windows and the like.  */
716         if (alpha_mv.init_arch)
717                 alpha_mv.init_arch();
718 
719         /* Reserve standard resources.  */
720         reserve_std_resources();
721 
722         /* 
723          * Give us a default console.  TGA users will see nothing until
724          * chr_dev_init is called, rather late in the boot sequence.
725          */
726 
727 #ifdef CONFIG_VT
728 #if defined(CONFIG_VGA_CONSOLE)
729         conswitchp = &vga_con;
730 #elif defined(CONFIG_DUMMY_CONSOLE)
731         conswitchp = &dummy_con;
732 #endif
733 #endif
734 
735         /* Default root filesystem to sda2.  */
736         ROOT_DEV = Root_SDA2;
737 
738 #ifdef CONFIG_EISA
739         /* FIXME:  only set this when we actually have EISA in this box? */
740         EISA_bus = 1;
741 #endif
742 
743         /*
744          * Check ASN in HWRPB for validity, report if bad.
745          * FIXME: how was this failing?  Should we trust it instead,
746          * and copy the value into alpha_mv.max_asn?
747          */
748 
749         if (hwrpb->max_asn != MAX_ASN) {
750                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
751         }
752 
753         /*
754          * Identify the flock of penguins.
755          */
756 
757 #ifdef CONFIG_SMP
758         setup_smp();
759 #endif
760         paging_init();
761 }
762 
763 static char sys_unknown[] = "Unknown";
764 static char systype_names[][16] = {
765         "",
766         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
767         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
768         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
769         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
770         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
771         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
772         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
773 };
774 
775 static char unofficial_names[][8] = {"100", "Ruffian"};
776 
777 static char api_names[][16] = {"200", "Nautilus"};
778 
779 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
780 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
781 
782 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
783 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
784 
785 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
786 static int eb64p_indices[] = {0,0,1,2};
787 
788 static char eb66_names[][8] = {"EB66", "EB66+"};
789 static int eb66_indices[] = {0,0,1};
790 
791 static char marvel_names[][16] = {
792         "Marvel/EV7"
793 };
794 static int marvel_indices[] = { 0 };
795 
796 static char rawhide_names[][16] = {
797         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
798 };
799 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
800 
801 static char titan_names[][16] = {
802         "DEFAULT", "Privateer", "Falcon", "Granite"
803 };
804 static int titan_indices[] = {0,1,2,2,3};
805 
806 static char tsunami_names[][16] = {
807         "", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
808         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
809         "Flying Clipper", "Shark"
810 };
811 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
812 
813 static struct alpha_machine_vector * __init
814 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
815 {
816         static struct alpha_machine_vector *systype_vecs[] __initdata =
817         {
818                 NULL,           /* 0 */
819                 NULL,           /* ADU */
820                 NULL,           /* Cobra */
821                 NULL,           /* Ruby */
822                 NULL,           /* Flamingo */
823                 NULL,           /* Mannequin */
824                 &jensen_mv,
825                 NULL,           /* Pelican */
826                 NULL,           /* Morgan */
827                 NULL,           /* Sable -- see below.  */
828                 NULL,           /* Medulla */
829                 &noname_mv,
830                 NULL,           /* Turbolaser */
831                 &avanti_mv,
832                 NULL,           /* Mustang */
833                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
834                 NULL,           /* Tradewind */
835                 NULL,           /* Mikasa -- see below.  */
836                 NULL,           /* EB64 */
837                 NULL,           /* EB66 -- see variation.  */
838                 NULL,           /* EB64+ -- see variation.  */
839                 &alphabook1_mv,
840                 &rawhide_mv,
841                 NULL,           /* K2 */
842                 &lynx_mv,       /* Lynx */
843                 &xl_mv,
844                 NULL,           /* EB164 -- see variation.  */
845                 NULL,           /* Noritake -- see below.  */
846                 NULL,           /* Cortex */
847                 NULL,           /* 29 */
848                 &miata_mv,
849                 NULL,           /* XXM */
850                 &takara_mv,
851                 NULL,           /* Yukon */
852                 NULL,           /* Tsunami -- see variation.  */
853                 &wildfire_mv,   /* Wildfire */
854                 NULL,           /* CUSCO */
855                 &eiger_mv,      /* Eiger */
856                 NULL,           /* Titan */
857                 NULL,           /* Marvel */
858         };
859 
860         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
861         {
862                 NULL,           /* 100 */
863                 &ruffian_mv,
864         };
865 
866         static struct alpha_machine_vector *api_vecs[] __initdata =
867         {
868                 NULL,           /* 200 */
869                 &nautilus_mv,
870         };
871 
872         static struct alpha_machine_vector *alcor_vecs[] __initdata = 
873         {
874                 &alcor_mv, &xlt_mv, &xlt_mv
875         };
876 
877         static struct alpha_machine_vector *eb164_vecs[] __initdata =
878         {
879                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
880         };
881 
882         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
883         {
884                 &eb64p_mv,
885                 &cabriolet_mv,
886                 &cabriolet_mv           /* AlphaPCI64 */
887         };
888 
889         static struct alpha_machine_vector *eb66_vecs[] __initdata =
890         {
891                 &eb66_mv,
892                 &eb66p_mv
893         };
894 
895         static struct alpha_machine_vector *marvel_vecs[] __initdata =
896         {
897                 &marvel_ev7_mv,
898         };
899 
900         static struct alpha_machine_vector *titan_vecs[] __initdata =
901         {
902                 &titan_mv,              /* default   */
903                 &privateer_mv,          /* privateer */
904                 &titan_mv,              /* falcon    */
905                 &privateer_mv,          /* granite   */
906         };
907 
908         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
909         {
910                 NULL,
911                 &dp264_mv,              /* dp264 */
912                 &dp264_mv,              /* warhol */
913                 &dp264_mv,              /* windjammer */
914                 &monet_mv,              /* monet */
915                 &clipper_mv,            /* clipper */
916                 &dp264_mv,              /* goldrush */
917                 &webbrick_mv,           /* webbrick */
918                 &dp264_mv,              /* catamaran */
919                 NULL,                   /* brisbane? */
920                 NULL,                   /* melbourne? */
921                 NULL,                   /* flying clipper? */
922                 &shark_mv,              /* shark */
923         };
924 
925         /* ??? Do we need to distinguish between Rawhides?  */
926 
927         struct alpha_machine_vector *vec;
928 
929         /* Search the system tables first... */
930         vec = NULL;
931         if (type < ARRAY_SIZE(systype_vecs)) {
932                 vec = systype_vecs[type];
933         } else if ((type > ST_API_BIAS) &&
934                    (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
935                 vec = api_vecs[type - ST_API_BIAS];
936         } else if ((type > ST_UNOFFICIAL_BIAS) &&
937                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
938                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
939         }
940 
941         /* If we've not found one, try for a variation.  */
942 
943         if (!vec) {
944                 /* Member ID is a bit-field. */
945                 unsigned long member = (variation >> 10) & 0x3f;
946 
947                 cpu &= 0xffffffff; /* make it usable */
948 
949                 switch (type) {
950                 case ST_DEC_ALCOR:
951                         if (member < ARRAY_SIZE(alcor_indices))
952                                 vec = alcor_vecs[alcor_indices[member]];
953                         break;
954                 case ST_DEC_EB164:
955                         if (member < ARRAY_SIZE(eb164_indices))
956                                 vec = eb164_vecs[eb164_indices[member]];
957                         /* PC164 may show as EB164 variation with EV56 CPU,
958                            but, since no true EB164 had anything but EV5... */
959                         if (vec == &eb164_mv && cpu == EV56_CPU)
960                                 vec = &pc164_mv;
961                         break;
962                 case ST_DEC_EB64P:
963                         if (member < ARRAY_SIZE(eb64p_indices))
964                                 vec = eb64p_vecs[eb64p_indices[member]];
965                         break;
966                 case ST_DEC_EB66:
967                         if (member < ARRAY_SIZE(eb66_indices))
968                                 vec = eb66_vecs[eb66_indices[member]];
969                         break;
970                 case ST_DEC_MARVEL:
971                         if (member < ARRAY_SIZE(marvel_indices))
972                                 vec = marvel_vecs[marvel_indices[member]];
973                         break;
974                 case ST_DEC_TITAN:
975                         vec = titan_vecs[0];    /* default */
976                         if (member < ARRAY_SIZE(titan_indices))
977                                 vec = titan_vecs[titan_indices[member]];
978                         break;
979                 case ST_DEC_TSUNAMI:
980                         if (member < ARRAY_SIZE(tsunami_indices))
981                                 vec = tsunami_vecs[tsunami_indices[member]];
982                         break;
983                 case ST_DEC_1000:
984                         if (cpu == EV5_CPU || cpu == EV56_CPU)
985                                 vec = &mikasa_primo_mv;
986                         else
987                                 vec = &mikasa_mv;
988                         break;
989                 case ST_DEC_NORITAKE:
990                         if (cpu == EV5_CPU || cpu == EV56_CPU)
991                                 vec = &noritake_primo_mv;
992                         else
993                                 vec = &noritake_mv;
994                         break;
995                 case ST_DEC_2100_A500:
996                         if (cpu == EV5_CPU || cpu == EV56_CPU)
997                                 vec = &sable_gamma_mv;
998                         else
999                                 vec = &sable_mv;
1000                         break;
1001                 }
1002         }
1003         return vec;
1004 }
1005 
1006 static struct alpha_machine_vector * __init
1007 get_sysvec_byname(const char *name)
1008 {
1009         static struct alpha_machine_vector *all_vecs[] __initdata =
1010         {
1011                 &alcor_mv,
1012                 &alphabook1_mv,
1013                 &avanti_mv,
1014                 &cabriolet_mv,
1015                 &clipper_mv,
1016                 &dp264_mv,
1017                 &eb164_mv,
1018                 &eb64p_mv,
1019                 &eb66_mv,
1020                 &eb66p_mv,
1021                 &eiger_mv,
1022                 &jensen_mv,
1023                 &lx164_mv,
1024                 &lynx_mv,
1025                 &miata_mv,
1026                 &mikasa_mv,
1027                 &mikasa_primo_mv,
1028                 &monet_mv,
1029                 &nautilus_mv,
1030                 &noname_mv,
1031                 &noritake_mv,
1032                 &noritake_primo_mv,
1033                 &p2k_mv,
1034                 &pc164_mv,
1035                 &privateer_mv,
1036                 &rawhide_mv,
1037                 &ruffian_mv,
1038                 &rx164_mv,
1039                 &sable_mv,
1040                 &sable_gamma_mv,
1041                 &shark_mv,
1042                 &sx164_mv,
1043                 &takara_mv,
1044                 &webbrick_mv,
1045                 &wildfire_mv,
1046                 &xl_mv,
1047                 &xlt_mv
1048         };
1049 
1050         size_t i;
1051 
1052         for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
1053                 struct alpha_machine_vector *mv = all_vecs[i];
1054                 if (strcasecmp(mv->vector_name, name) == 0)
1055                         return mv;
1056         }
1057         return NULL;
1058 }
1059 
1060 static void
1061 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1062              char **type_name, char **variation_name)
1063 {
1064         unsigned long member;
1065 
1066         /* If not in the tables, make it UNKNOWN,
1067            else set type name to family */
1068         if (type < ARRAY_SIZE(systype_names)) {
1069                 *type_name = systype_names[type];
1070         } else if ((type > ST_API_BIAS) &&
1071                    (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
1072                 *type_name = api_names[type - ST_API_BIAS];
1073         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1074                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1075                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1076         } else {
1077                 *type_name = sys_unknown;
1078                 *variation_name = sys_unknown;
1079                 return;
1080         }
1081 
1082         /* Set variation to ""; if variation is zero, done.  */
1083         *variation_name = systype_names[0];
1084         if (variation == 0) {
1085                 return;
1086         }
1087 
1088         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1089 
1090         cpu &= 0xffffffff; /* make it usable */
1091 
1092         switch (type) { /* select by family */
1093         default: /* default to variation "" for now */
1094                 break;
1095         case ST_DEC_EB164:
1096                 if (member < ARRAY_SIZE(eb164_indices))
1097                         *variation_name = eb164_names[eb164_indices[member]];
1098                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1099                    so, since no true EB164 had anything but EV5... */
1100                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1101                         *variation_name = eb164_names[1]; /* make it PC164 */
1102                 break;
1103         case ST_DEC_ALCOR:
1104                 if (member < ARRAY_SIZE(alcor_indices))
1105                         *variation_name = alcor_names[alcor_indices[member]];
1106                 break;
1107         case ST_DEC_EB64P:
1108                 if (member < ARRAY_SIZE(eb64p_indices))
1109                         *variation_name = eb64p_names[eb64p_indices[member]];
1110                 break;
1111         case ST_DEC_EB66:
1112                 if (member < ARRAY_SIZE(eb66_indices))
1113                         *variation_name = eb66_names[eb66_indices[member]];
1114                 break;
1115         case ST_DEC_MARVEL:
1116                 if (member < ARRAY_SIZE(marvel_indices))
1117                         *variation_name = marvel_names[marvel_indices[member]];
1118                 break;
1119         case ST_DEC_RAWHIDE:
1120                 if (member < ARRAY_SIZE(rawhide_indices))
1121                         *variation_name = rawhide_names[rawhide_indices[member]];
1122                 break;
1123         case ST_DEC_TITAN:
1124                 *variation_name = titan_names[0];       /* default */
1125                 if (member < ARRAY_SIZE(titan_indices))
1126                         *variation_name = titan_names[titan_indices[member]];
1127                 break;
1128         case ST_DEC_TSUNAMI:
1129                 if (member < ARRAY_SIZE(tsunami_indices))
1130                         *variation_name = tsunami_names[tsunami_indices[member]];
1131                 break;
1132         }
1133 }
1134 
1135 /*
1136  * A change was made to the HWRPB via an ECO and the following code
1137  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1138  * was not implemented in the console firmware.  If it's revision 5 or
1139  * greater we can get the name of the platform as an ASCII string from
1140  * the HWRPB.  That's what this function does.  It checks the revision
1141  * level and if the string is in the HWRPB it returns the address of
1142  * the string--a pointer to the name of the platform.
1143  *
1144  * Returns:
1145  *      - Pointer to a ASCII string if it's in the HWRPB
1146  *      - Pointer to a blank string if the data is not in the HWRPB.
1147  */
1148 
1149 static char *
1150 platform_string(void)
1151 {
1152         struct dsr_struct *dsr;
1153         static char unk_system_string[] = "N/A";
1154 
1155         /* Go to the console for the string pointer.
1156          * If the rpb_vers is not 5 or greater the rpb
1157          * is old and does not have this data in it.
1158          */
1159         if (hwrpb->revision < 5)
1160                 return (unk_system_string);
1161         else {
1162                 /* The Dynamic System Recognition struct
1163                  * has the system platform name starting
1164                  * after the character count of the string.
1165                  */
1166                 dsr =  ((struct dsr_struct *)
1167                         ((char *)hwrpb + hwrpb->dsr_offset));
1168                 return ((char *)dsr + (dsr->sysname_off +
1169                                        sizeof(long)));
1170         }
1171 }
1172 
1173 static int
1174 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1175 {
1176         struct percpu_struct *cpu;
1177         unsigned long i;
1178         int count = 0;
1179 
1180         for (i = 0; i < num; i++) {
1181                 cpu = (struct percpu_struct *)
1182                         ((char *)cpubase + i*hwrpb->processor_size);
1183                 if ((cpu->flags & 0x1cc) == 0x1cc)
1184                         count++;
1185         }
1186         return count;
1187 }
1188 
1189 static void
1190 show_cache_size (struct seq_file *f, const char *which, int shape)
1191 {
1192         if (shape == -1)
1193                 seq_printf (f, "%s\t\t: n/a\n", which);
1194         else if (shape == 0)
1195                 seq_printf (f, "%s\t\t: unknown\n", which);
1196         else
1197                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1198                             which, shape >> 10, shape & 15,
1199                             1 << ((shape >> 4) & 15));
1200 }
1201 
1202 static int
1203 show_cpuinfo(struct seq_file *f, void *slot)
1204 {
1205         extern struct unaligned_stat {
1206                 unsigned long count, va, pc;
1207         } unaligned[2];
1208 
1209         static char cpu_names[][8] = {
1210                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1211                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1212                 "EV68CX", "EV7", "EV79", "EV69"
1213         };
1214 
1215         struct percpu_struct *cpu = slot;
1216         unsigned int cpu_index;
1217         char *cpu_name;
1218         char *systype_name;
1219         char *sysvariation_name;
1220         int nr_processors;
1221         unsigned long timer_freq;
1222 
1223         cpu_index = (unsigned) (cpu->type - 1);
1224         cpu_name = "Unknown";
1225         if (cpu_index < ARRAY_SIZE(cpu_names))
1226                 cpu_name = cpu_names[cpu_index];
1227 
1228         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1229                      cpu->type, &systype_name, &sysvariation_name);
1230 
1231         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1232 
1233 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200
1234         timer_freq = (100UL * hwrpb->intr_freq) / 4096;
1235 #else
1236         timer_freq = 100UL * CONFIG_HZ;
1237 #endif
1238 
1239         seq_printf(f, "cpu\t\t\t: Alpha\n"
1240                       "cpu model\t\t: %s\n"
1241                       "cpu variation\t\t: %ld\n"
1242                       "cpu revision\t\t: %ld\n"
1243                       "cpu serial number\t: %s\n"
1244                       "system type\t\t: %s\n"
1245                       "system variation\t: %s\n"
1246                       "system revision\t\t: %ld\n"
1247                       "system serial number\t: %s\n"
1248                       "cycle frequency [Hz]\t: %lu %s\n"
1249                       "timer frequency [Hz]\t: %lu.%02lu\n"
1250                       "page size [bytes]\t: %ld\n"
1251                       "phys. address bits\t: %ld\n"
1252                       "max. addr. space #\t: %ld\n"
1253                       "BogoMIPS\t\t: %lu.%02lu\n"
1254                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1255                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1256                       "platform string\t\t: %s\n"
1257                       "cpus detected\t\t: %d\n",
1258                        cpu_name, cpu->variation, cpu->revision,
1259                        (char*)cpu->serial_no,
1260                        systype_name, sysvariation_name, hwrpb->sys_revision,
1261                        (char*)hwrpb->ssn,
1262                        est_cycle_freq ? : hwrpb->cycle_freq,
1263                        est_cycle_freq ? "est." : "",
1264                        timer_freq / 100, timer_freq % 100,
1265                        hwrpb->pagesize,
1266                        hwrpb->pa_bits,
1267                        hwrpb->max_asn,
1268                        loops_per_jiffy / (500000/HZ),
1269                        (loops_per_jiffy / (5000/HZ)) % 100,
1270                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1271                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1272                        platform_string(), nr_processors);
1273 
1274 #ifdef CONFIG_SMP
1275         seq_printf(f, "cpus active\t\t: %u\n"
1276                       "cpu active mask\t\t: %016lx\n",
1277                        num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]);
1278 #endif
1279 
1280         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1281         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1282         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1283         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1284 
1285         return 0;
1286 }
1287 
1288 static int __init
1289 read_mem_block(int *addr, int stride, int size)
1290 {
1291         long nloads = size / stride, cnt, tmp;
1292 
1293         __asm__ __volatile__(
1294         "       rpcc    %0\n"
1295         "1:     ldl     %3,0(%2)\n"
1296         "       subq    %1,1,%1\n"
1297         /* Next two XORs introduce an explicit data dependency between
1298            consecutive loads in the loop, which will give us true load
1299            latency. */
1300         "       xor     %3,%2,%2\n"
1301         "       xor     %3,%2,%2\n"
1302         "       addq    %2,%4,%2\n"
1303         "       bne     %1,1b\n"
1304         "       rpcc    %3\n"
1305         "       subl    %3,%0,%0\n"
1306         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1307         : "r" (stride), "1" (nloads), "2" (addr));
1308 
1309         return cnt / (size / stride);
1310 }
1311 
1312 #define CSHAPE(totalsize, linesize, assoc) \
1313   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1314 
1315 /* ??? EV5 supports up to 64M, but did the systems with more than
1316    16M of BCACHE ever exist? */
1317 #define MAX_BCACHE_SIZE 16*1024*1024
1318 
1319 /* Note that the offchip caches are direct mapped on all Alphas. */
1320 static int __init
1321 external_cache_probe(int minsize, int width)
1322 {
1323         int cycles, prev_cycles = 1000000;
1324         int stride = 1 << width;
1325         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1326 
1327         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1328                 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1329 
1330         /* Get the first block cached. */
1331         read_mem_block(__va(0), stride, size);
1332 
1333         while (size < maxsize) {
1334                 /* Get an average load latency in cycles. */
1335                 cycles = read_mem_block(__va(0), stride, size);
1336                 if (cycles > prev_cycles * 2) {
1337                         /* Fine, we exceed the cache. */
1338                         printk("%ldK Bcache detected; load hit latency %d "
1339                                "cycles, load miss latency %d cycles\n",
1340                                size >> 11, prev_cycles, cycles);
1341                         return CSHAPE(size >> 1, width, 1);
1342                 }
1343                 /* Try to get the next block cached. */
1344                 read_mem_block(__va(size), stride, size);
1345                 prev_cycles = cycles;
1346                 size <<= 1;
1347         }
1348         return -1;      /* No BCACHE found. */
1349 }
1350 
1351 static void __init
1352 determine_cpu_caches (unsigned int cpu_type)
1353 {
1354         int L1I, L1D, L2, L3;
1355 
1356         switch (cpu_type) {
1357         case EV4_CPU:
1358         case EV45_CPU:
1359           {
1360                 if (cpu_type == EV4_CPU)
1361                         L1I = CSHAPE(8*1024, 5, 1);
1362                 else
1363                         L1I = CSHAPE(16*1024, 5, 1);
1364                 L1D = L1I;
1365                 L3 = -1;
1366         
1367                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1368                    shadow copy, and may be available from some versions
1369                    of the CSERVE PALcall.  If we can get it, then
1370 
1371                         unsigned long biu_ctl, size;
1372                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1373                         L2 = CSHAPE (size, 5, 1);
1374 
1375                    Unfortunately, we can't rely on that.
1376                 */
1377                 L2 = external_cache_probe(128*1024, 5);
1378                 break;
1379           }
1380 
1381         case LCA4_CPU:
1382           {
1383                 unsigned long car, size;
1384 
1385                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1386                 L3 = -1;
1387 
1388                 car = *(vuip) phys_to_virt (0x120000078UL);
1389                 size = 64*1024 * (1 << ((car >> 5) & 7));
1390                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1391                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1392                 break;
1393           }
1394 
1395         case EV5_CPU:
1396         case EV56_CPU:
1397           {
1398                 unsigned long sc_ctl, width;
1399 
1400                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1401 
1402                 /* Check the line size of the Scache.  */
1403                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1404                 width = sc_ctl & 0x1000 ? 6 : 5;
1405                 L2 = CSHAPE (96*1024, width, 3);
1406 
1407                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1408                    has a shadow copy, and may be available from some versions
1409                    of the CSERVE PALcall.  If we can get it, then
1410 
1411                         unsigned long bc_control, bc_config, size;
1412                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1413                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1414 
1415                    Unfortunately, we can't rely on that.
1416                 */
1417                 L3 = external_cache_probe(1024*1024, width);
1418                 break;
1419           }
1420 
1421         case PCA56_CPU:
1422         case PCA57_CPU:
1423           {
1424                 if (cpu_type == PCA56_CPU) {
1425                         L1I = CSHAPE(16*1024, 6, 1);
1426                         L1D = CSHAPE(8*1024, 5, 1);
1427                 } else {
1428                         L1I = CSHAPE(32*1024, 6, 2);
1429                         L1D = CSHAPE(16*1024, 5, 1);
1430                 }
1431                 L3 = -1;
1432 
1433 #if 0
1434                 unsigned long cbox_config, size;
1435 
1436                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1437                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1438 
1439                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1440 #else
1441                 L2 = external_cache_probe(512*1024, 6);
1442 #endif
1443                 break;
1444           }
1445 
1446         case EV6_CPU:
1447         case EV67_CPU:
1448         case EV68CB_CPU:
1449         case EV68AL_CPU:
1450         case EV68CX_CPU:
1451         case EV69_CPU:
1452                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1453                 L2 = external_cache_probe(1024*1024, 6);
1454                 L3 = -1;
1455                 break;
1456 
1457         case EV7_CPU:
1458         case EV79_CPU:
1459                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1460                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1461                 L3 = -1;
1462                 break;
1463 
1464         default:
1465                 /* Nothing known about this cpu type.  */
1466                 L1I = L1D = L2 = L3 = 0;
1467                 break;
1468         }
1469 
1470         alpha_l1i_cacheshape = L1I;
1471         alpha_l1d_cacheshape = L1D;
1472         alpha_l2_cacheshape = L2;
1473         alpha_l3_cacheshape = L3;
1474 }
1475 
1476 /*
1477  * We show only CPU #0 info.
1478  */
1479 static void *
1480 c_start(struct seq_file *f, loff_t *pos)
1481 {
1482         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1483 }
1484 
1485 static void *
1486 c_next(struct seq_file *f, void *v, loff_t *pos)
1487 {
1488         return NULL;
1489 }
1490 
1491 static void
1492 c_stop(struct seq_file *f, void *v)
1493 {
1494 }
1495 
1496 const struct seq_operations cpuinfo_op = {
1497         .start  = c_start,
1498         .next   = c_next,
1499         .stop   = c_stop,
1500         .show   = show_cpuinfo,
1501 };
1502 
1503 
1504 static int
1505 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1506 {
1507 #if 1
1508         /* FIXME FIXME FIXME */
1509         /* If we are using SRM and serial console, just hard halt here. */
1510         if (alpha_using_srm && srmcons_output)
1511                 __halt();
1512 #endif
1513         return NOTIFY_DONE;
1514 }
1515 
1516 static __init int add_pcspkr(void)
1517 {
1518         struct platform_device *pd;
1519         int ret;
1520 
1521         pd = platform_device_alloc("pcspkr", -1);
1522         if (!pd)
1523                 return -ENOMEM;
1524 
1525         ret = platform_device_add(pd);
1526         if (ret)
1527                 platform_device_put(pd);
1528 
1529         return ret;
1530 }
1531 device_initcall(add_pcspkr);
1532 

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