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TOMOYO Linux Cross Reference
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/bootmem.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/pgtable.h>
 59 #include <asm/hwrpb.h>
 60 #include <asm/dma.h>
 61 #include <asm/mmu_context.h>
 62 #include <asm/console.h>
 63 
 64 #include "proto.h"
 65 #include "pci_impl.h"
 66 
 67 
 68 struct hwrpb_struct *hwrpb;
 69 EXPORT_SYMBOL(hwrpb);
 70 unsigned long srm_hae;
 71 
 72 int alpha_l1i_cacheshape;
 73 int alpha_l1d_cacheshape;
 74 int alpha_l2_cacheshape;
 75 int alpha_l3_cacheshape;
 76 
 77 #ifdef CONFIG_VERBOSE_MCHECK
 78 /* 0=minimum, 1=verbose, 2=all */
 79 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
 80 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
 81 #endif
 82 
 83 #ifdef CONFIG_NUMA
 84 struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
 85 EXPORT_SYMBOL(node_to_cpumask_map);
 86 #endif
 87 
 88 /* Which processor we booted from.  */
 89 int boot_cpuid;
 90 
 91 /*
 92  * Using SRM callbacks for initial console output. This works from
 93  * setup_arch() time through the end of time_init(), as those places
 94  * are under our (Alpha) control.
 95 
 96  * "srmcons" specified in the boot command arguments allows us to
 97  * see kernel messages during the period of time before the true
 98  * console device is "registered" during console_init(). 
 99  * As of this version (2.5.59), console_init() will call
100  * disable_early_printk() as the last action before initializing
101  * the console drivers. That's the last possible time srmcons can be 
102  * unregistered without interfering with console behavior.
103  *
104  * By default, OFF; set it with a bootcommand arg of "srmcons" or 
105  * "console=srm". The meaning of these two args is:
106  *     "srmcons"     - early callback prints 
107  *     "console=srm" - full callback based console, including early prints
108  */
109 int srmcons_output = 0;
110 
111 /* Enforce a memory size limit; useful for testing. By default, none. */
112 unsigned long mem_size_limit = 0;
113 
114 /* Set AGP GART window size (0 means disabled). */
115 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
116 
117 #ifdef CONFIG_ALPHA_GENERIC
118 struct alpha_machine_vector alpha_mv;
119 EXPORT_SYMBOL(alpha_mv);
120 #endif
121 
122 #ifndef alpha_using_srm
123 int alpha_using_srm;
124 EXPORT_SYMBOL(alpha_using_srm);
125 #endif
126 
127 #ifndef alpha_using_qemu
128 int alpha_using_qemu;
129 #endif
130 
131 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
132                                                unsigned long);
133 static struct alpha_machine_vector *get_sysvec_byname(const char *);
134 static void get_sysnames(unsigned long, unsigned long, unsigned long,
135                          char **, char **);
136 static void determine_cpu_caches (unsigned int);
137 
138 static char __initdata command_line[COMMAND_LINE_SIZE];
139 
140 /*
141  * The format of "screen_info" is strange, and due to early
142  * i386-setup code. This is just enough to make the console
143  * code think we're on a VGA color display.
144  */
145 
146 struct screen_info screen_info = {
147         .orig_x = 0,
148         .orig_y = 25,
149         .orig_video_cols = 80,
150         .orig_video_lines = 25,
151         .orig_video_isVGA = 1,
152         .orig_video_points = 16
153 };
154 
155 EXPORT_SYMBOL(screen_info);
156 
157 /*
158  * The direct map I/O window, if any.  This should be the same
159  * for all busses, since it's used by virt_to_bus.
160  */
161 
162 unsigned long __direct_map_base;
163 unsigned long __direct_map_size;
164 EXPORT_SYMBOL(__direct_map_base);
165 EXPORT_SYMBOL(__direct_map_size);
166 
167 /*
168  * Declare all of the machine vectors.
169  */
170 
171 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either 
172    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
173    to the assembler.  */
174 
175 #define WEAK(X) \
176         extern struct alpha_machine_vector X; \
177         asm(".weak "#X)
178 
179 WEAK(alcor_mv);
180 WEAK(alphabook1_mv);
181 WEAK(avanti_mv);
182 WEAK(cabriolet_mv);
183 WEAK(clipper_mv);
184 WEAK(dp264_mv);
185 WEAK(eb164_mv);
186 WEAK(eb64p_mv);
187 WEAK(eb66_mv);
188 WEAK(eb66p_mv);
189 WEAK(eiger_mv);
190 WEAK(jensen_mv);
191 WEAK(lx164_mv);
192 WEAK(lynx_mv);
193 WEAK(marvel_ev7_mv);
194 WEAK(miata_mv);
195 WEAK(mikasa_mv);
196 WEAK(mikasa_primo_mv);
197 WEAK(monet_mv);
198 WEAK(nautilus_mv);
199 WEAK(noname_mv);
200 WEAK(noritake_mv);
201 WEAK(noritake_primo_mv);
202 WEAK(p2k_mv);
203 WEAK(pc164_mv);
204 WEAK(privateer_mv);
205 WEAK(rawhide_mv);
206 WEAK(ruffian_mv);
207 WEAK(rx164_mv);
208 WEAK(sable_mv);
209 WEAK(sable_gamma_mv);
210 WEAK(shark_mv);
211 WEAK(sx164_mv);
212 WEAK(takara_mv);
213 WEAK(titan_mv);
214 WEAK(webbrick_mv);
215 WEAK(wildfire_mv);
216 WEAK(xl_mv);
217 WEAK(xlt_mv);
218 
219 #undef WEAK
220 
221 /*
222  * I/O resources inherited from PeeCees.  Except for perhaps the
223  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
224  *
225  * ??? If this becomes less standard, move the struct out into the
226  * machine vector.
227  */
228 
229 static void __init
230 reserve_std_resources(void)
231 {
232         static struct resource standard_io_resources[] = {
233                 { .name = "rtc", .start = -1, .end = -1 },
234                 { .name = "dma1", .start = 0x00, .end = 0x1f },
235                 { .name = "pic1", .start = 0x20, .end = 0x3f },
236                 { .name = "timer", .start = 0x40, .end = 0x5f },
237                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
238                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
239                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
240                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
241         };
242 
243         struct resource *io = &ioport_resource;
244         size_t i;
245 
246         if (hose_head) {
247                 struct pci_controller *hose;
248                 for (hose = hose_head; hose; hose = hose->next)
249                         if (hose->index == 0) {
250                                 io = hose->io_space;
251                                 break;
252                         }
253         }
254 
255         /* Fix up for the Jensen's queer RTC placement.  */
256         standard_io_resources[0].start = RTC_PORT(0);
257         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
258 
259         for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
260                 request_resource(io, standard_io_resources+i);
261 }
262 
263 #define PFN_MAX         PFN_DOWN(0x80000000)
264 #define for_each_mem_cluster(memdesc, _cluster, i)              \
265         for ((_cluster) = (memdesc)->cluster, (i) = 0;          \
266              (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
267 
268 static unsigned long __init
269 get_mem_size_limit(char *s)
270 {
271         unsigned long end = 0;
272         char *from = s;
273 
274         end = simple_strtoul(from, &from, 0);
275         if ( *from == 'K' || *from == 'k' ) {
276                 end = end << 10;
277                 from++;
278         } else if ( *from == 'M' || *from == 'm' ) {
279                 end = end << 20;
280                 from++;
281         } else if ( *from == 'G' || *from == 'g' ) {
282                 end = end << 30;
283                 from++;
284         }
285         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
286 }
287 
288 #ifdef CONFIG_BLK_DEV_INITRD
289 void * __init
290 move_initrd(unsigned long mem_limit)
291 {
292         void *start;
293         unsigned long size;
294 
295         size = initrd_end - initrd_start;
296         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
297         if (!start || __pa(start) + size > mem_limit) {
298                 initrd_start = initrd_end = 0;
299                 return NULL;
300         }
301         memmove(start, (void *)initrd_start, size);
302         initrd_start = (unsigned long)start;
303         initrd_end = initrd_start + size;
304         printk("initrd moved to %p\n", start);
305         return start;
306 }
307 #endif
308 
309 #ifndef CONFIG_DISCONTIGMEM
310 static void __init
311 setup_memory(void *kernel_end)
312 {
313         struct memclust_struct * cluster;
314         struct memdesc_struct * memdesc;
315         unsigned long start_kernel_pfn, end_kernel_pfn;
316         unsigned long bootmap_size, bootmap_pages, bootmap_start;
317         unsigned long start, end;
318         unsigned long i;
319 
320         /* Find free clusters, and init and free the bootmem accordingly.  */
321         memdesc = (struct memdesc_struct *)
322           (hwrpb->mddt_offset + (unsigned long) hwrpb);
323 
324         for_each_mem_cluster(memdesc, cluster, i) {
325                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
326                        i, cluster->usage, cluster->start_pfn,
327                        cluster->start_pfn + cluster->numpages);
328 
329                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
330                    non-volatile memory -- we might want to mark
331                    this for later.  */
332                 if (cluster->usage & 3)
333                         continue;
334 
335                 end = cluster->start_pfn + cluster->numpages;
336                 if (end > max_low_pfn)
337                         max_low_pfn = end;
338         }
339 
340         /*
341          * Except for the NUMA systems (wildfire, marvel) all of the 
342          * Alpha systems we run on support 32GB of memory or less.
343          * Since the NUMA systems introduce large holes in memory addressing,
344          * we can get into a situation where there is not enough contiguous
345          * memory for the memory map. 
346          *
347          * Limit memory to the first 32GB to limit the NUMA systems to 
348          * memory on their first node (wildfire) or 2 (marvel) to avoid 
349          * not being able to produce the memory map. In order to access 
350          * all of the memory on the NUMA systems, build with discontiguous
351          * memory support.
352          *
353          * If the user specified a memory limit, let that memory limit stand.
354          */
355         if (!mem_size_limit) 
356                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
357 
358         if (mem_size_limit && max_low_pfn >= mem_size_limit)
359         {
360                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
361                        mem_size_limit << (PAGE_SHIFT - 10),
362                        max_low_pfn    << (PAGE_SHIFT - 10));
363                 max_low_pfn = mem_size_limit;
364         }
365 
366         /* Find the bounds of kernel memory.  */
367         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
368         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
369         bootmap_start = -1;
370 
371  try_again:
372         if (max_low_pfn <= end_kernel_pfn)
373                 panic("not enough memory to boot");
374 
375         /* We need to know how many physically contiguous pages
376            we'll need for the bootmap.  */
377         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
378 
379         /* Now find a good region where to allocate the bootmap.  */
380         for_each_mem_cluster(memdesc, cluster, i) {
381                 if (cluster->usage & 3)
382                         continue;
383 
384                 start = cluster->start_pfn;
385                 end = start + cluster->numpages;
386                 if (start >= max_low_pfn)
387                         continue;
388                 if (end > max_low_pfn)
389                         end = max_low_pfn;
390                 if (start < start_kernel_pfn) {
391                         if (end > end_kernel_pfn
392                             && end - end_kernel_pfn >= bootmap_pages) {
393                                 bootmap_start = end_kernel_pfn;
394                                 break;
395                         } else if (end > start_kernel_pfn)
396                                 end = start_kernel_pfn;
397                 } else if (start < end_kernel_pfn)
398                         start = end_kernel_pfn;
399                 if (end - start >= bootmap_pages) {
400                         bootmap_start = start;
401                         break;
402                 }
403         }
404 
405         if (bootmap_start == ~0UL) {
406                 max_low_pfn >>= 1;
407                 goto try_again;
408         }
409 
410         /* Allocate the bootmap and mark the whole MM as reserved.  */
411         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
412 
413         /* Mark the free regions.  */
414         for_each_mem_cluster(memdesc, cluster, i) {
415                 if (cluster->usage & 3)
416                         continue;
417 
418                 start = cluster->start_pfn;
419                 end = cluster->start_pfn + cluster->numpages;
420                 if (start >= max_low_pfn)
421                         continue;
422                 if (end > max_low_pfn)
423                         end = max_low_pfn;
424                 if (start < start_kernel_pfn) {
425                         if (end > end_kernel_pfn) {
426                                 free_bootmem(PFN_PHYS(start),
427                                              (PFN_PHYS(start_kernel_pfn)
428                                               - PFN_PHYS(start)));
429                                 printk("freeing pages %ld:%ld\n",
430                                        start, start_kernel_pfn);
431                                 start = end_kernel_pfn;
432                         } else if (end > start_kernel_pfn)
433                                 end = start_kernel_pfn;
434                 } else if (start < end_kernel_pfn)
435                         start = end_kernel_pfn;
436                 if (start >= end)
437                         continue;
438 
439                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
440                 printk("freeing pages %ld:%ld\n", start, end);
441         }
442 
443         /* Reserve the bootmap memory.  */
444         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size,
445                         BOOTMEM_DEFAULT);
446         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
447 
448 #ifdef CONFIG_BLK_DEV_INITRD
449         initrd_start = INITRD_START;
450         if (initrd_start) {
451                 initrd_end = initrd_start+INITRD_SIZE;
452                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
453                        (void *) initrd_start, INITRD_SIZE);
454 
455                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
456                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
457                                 printk("initrd extends beyond end of memory "
458                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
459                                        initrd_end,
460                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
461                 } else {
462                         reserve_bootmem(virt_to_phys((void *)initrd_start),
463                                         INITRD_SIZE, BOOTMEM_DEFAULT);
464                 }
465         }
466 #endif /* CONFIG_BLK_DEV_INITRD */
467 }
468 #else
469 extern void setup_memory(void *);
470 #endif /* !CONFIG_DISCONTIGMEM */
471 
472 int __init
473 page_is_ram(unsigned long pfn)
474 {
475         struct memclust_struct * cluster;
476         struct memdesc_struct * memdesc;
477         unsigned long i;
478 
479         memdesc = (struct memdesc_struct *)
480                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
481         for_each_mem_cluster(memdesc, cluster, i)
482         {
483                 if (pfn >= cluster->start_pfn  &&
484                     pfn < cluster->start_pfn + cluster->numpages) {
485                         return (cluster->usage & 3) ? 0 : 1;
486                 }
487         }
488 
489         return 0;
490 }
491 
492 static int __init
493 register_cpus(void)
494 {
495         int i;
496 
497         for_each_possible_cpu(i) {
498                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
499                 if (!p)
500                         return -ENOMEM;
501                 register_cpu(p, i);
502         }
503         return 0;
504 }
505 
506 arch_initcall(register_cpus);
507 
508 void __init
509 setup_arch(char **cmdline_p)
510 {
511         extern char _end[];
512 
513         struct alpha_machine_vector *vec = NULL;
514         struct percpu_struct *cpu;
515         char *type_name, *var_name, *p;
516         void *kernel_end = _end; /* end of kernel */
517         char *args = command_line;
518 
519         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
520         boot_cpuid = hard_smp_processor_id();
521 
522         /*
523          * Pre-process the system type to make sure it will be valid.
524          *
525          * This may restore real CABRIO and EB66+ family names, ie
526          * EB64+ and EB66.
527          *
528          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
529          * and AS1200 (DIGITAL Server 5000 series) have the type as
530          * the negative of the real one.
531          */
532         if ((long)hwrpb->sys_type < 0) {
533                 hwrpb->sys_type = -((long)hwrpb->sys_type);
534                 hwrpb_update_checksum(hwrpb);
535         }
536 
537         /* Register a call for panic conditions. */
538         atomic_notifier_chain_register(&panic_notifier_list,
539                         &alpha_panic_block);
540 
541 #ifndef alpha_using_srm
542         /* Assume that we've booted from SRM if we haven't booted from MILO.
543            Detect the later by looking for "MILO" in the system serial nr.  */
544         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
545 #endif
546 #ifndef alpha_using_qemu
547         /* Similarly, look for QEMU.  */
548         alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0;
549 #endif
550 
551         /* If we are using SRM, we want to allow callbacks
552            as early as possible, so do this NOW, and then
553            they should work immediately thereafter.
554         */
555         kernel_end = callback_init(kernel_end);
556 
557         /* 
558          * Locate the command line.
559          */
560         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
561            boot flags depending on the boot mode, we need some shorthand.
562            This should do for installation.  */
563         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
564                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
565         } else {
566                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
567         }
568         strcpy(boot_command_line, command_line);
569         *cmdline_p = command_line;
570 
571         /* 
572          * Process command-line arguments.
573          */
574         while ((p = strsep(&args, " \t")) != NULL) {
575                 if (!*p) continue;
576                 if (strncmp(p, "alpha_mv=", 9) == 0) {
577                         vec = get_sysvec_byname(p+9);
578                         continue;
579                 }
580                 if (strncmp(p, "cycle=", 6) == 0) {
581                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
582                         continue;
583                 }
584                 if (strncmp(p, "mem=", 4) == 0) {
585                         mem_size_limit = get_mem_size_limit(p+4);
586                         continue;
587                 }
588                 if (strncmp(p, "srmcons", 7) == 0) {
589                         srmcons_output |= 1;
590                         continue;
591                 }
592                 if (strncmp(p, "console=srm", 11) == 0) {
593                         srmcons_output |= 2;
594                         continue;
595                 }
596                 if (strncmp(p, "gartsize=", 9) == 0) {
597                         alpha_agpgart_size =
598                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
599                         continue;
600                 }
601 #ifdef CONFIG_VERBOSE_MCHECK
602                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
603                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
604                         continue;
605                 }
606 #endif
607         }
608 
609         /* Replace the command line, now that we've killed it with strsep.  */
610         strcpy(command_line, boot_command_line);
611 
612         /* If we want SRM console printk echoing early, do it now. */
613         if (alpha_using_srm && srmcons_output) {
614                 register_srm_console();
615 
616                 /*
617                  * If "console=srm" was specified, clear the srmcons_output
618                  * flag now so that time.c won't unregister_srm_console
619                  */
620                 if (srmcons_output & 2)
621                         srmcons_output = 0;
622         }
623 
624 #ifdef CONFIG_MAGIC_SYSRQ
625         /* If we're using SRM, make sysrq-b halt back to the prom,
626            not auto-reboot.  */
627         if (alpha_using_srm) {
628                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
629                 op->handler = (void *) machine_halt;
630         }
631 #endif
632 
633         /*
634          * Identify and reconfigure for the current system.
635          */
636         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
637 
638         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
639                      cpu->type, &type_name, &var_name);
640         if (*var_name == '')
641                 var_name = "";
642 
643         if (!vec) {
644                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
645                                  cpu->type);
646         }
647 
648         if (!vec) {
649                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
650                       type_name, (*var_name ? " variation " : ""), var_name,
651                       hwrpb->sys_type, hwrpb->sys_variation);
652         }
653         if (vec != &alpha_mv) {
654                 alpha_mv = *vec;
655         }
656         
657         printk("Booting "
658 #ifdef CONFIG_ALPHA_GENERIC
659                "GENERIC "
660 #endif
661                "on %s%s%s using machine vector %s from %s\n",
662                type_name, (*var_name ? " variation " : ""),
663                var_name, alpha_mv.vector_name,
664                (alpha_using_srm ? "SRM" : "MILO"));
665 
666         printk("Major Options: "
667 #ifdef CONFIG_SMP
668                "SMP "
669 #endif
670 #ifdef CONFIG_ALPHA_EV56
671                "EV56 "
672 #endif
673 #ifdef CONFIG_ALPHA_EV67
674                "EV67 "
675 #endif
676 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
677                "LEGACY_START "
678 #endif
679 #ifdef CONFIG_VERBOSE_MCHECK
680                "VERBOSE_MCHECK "
681 #endif
682 
683 #ifdef CONFIG_DISCONTIGMEM
684                "DISCONTIGMEM "
685 #ifdef CONFIG_NUMA
686                "NUMA "
687 #endif
688 #endif
689 
690 #ifdef CONFIG_DEBUG_SPINLOCK
691                "DEBUG_SPINLOCK "
692 #endif
693 #ifdef CONFIG_MAGIC_SYSRQ
694                "MAGIC_SYSRQ "
695 #endif
696                "\n");
697 
698         printk("Command line: %s\n", command_line);
699 
700         /* 
701          * Sync up the HAE.
702          * Save the SRM's current value for restoration.
703          */
704         srm_hae = *alpha_mv.hae_register;
705         __set_hae(alpha_mv.hae_cache);
706 
707         /* Reset enable correctable error reports.  */
708         wrmces(0x7);
709 
710         /* Find our memory.  */
711         setup_memory(kernel_end);
712 
713         /* First guess at cpu cache sizes.  Do this before init_arch.  */
714         determine_cpu_caches(cpu->type);
715 
716         /* Initialize the machine.  Usually has to do with setting up
717            DMA windows and the like.  */
718         if (alpha_mv.init_arch)
719                 alpha_mv.init_arch();
720 
721         /* Reserve standard resources.  */
722         reserve_std_resources();
723 
724         /* 
725          * Give us a default console.  TGA users will see nothing until
726          * chr_dev_init is called, rather late in the boot sequence.
727          */
728 
729 #ifdef CONFIG_VT
730 #if defined(CONFIG_VGA_CONSOLE)
731         conswitchp = &vga_con;
732 #elif defined(CONFIG_DUMMY_CONSOLE)
733         conswitchp = &dummy_con;
734 #endif
735 #endif
736 
737         /* Default root filesystem to sda2.  */
738         ROOT_DEV = Root_SDA2;
739 
740 #ifdef CONFIG_EISA
741         /* FIXME:  only set this when we actually have EISA in this box? */
742         EISA_bus = 1;
743 #endif
744 
745         /*
746          * Check ASN in HWRPB for validity, report if bad.
747          * FIXME: how was this failing?  Should we trust it instead,
748          * and copy the value into alpha_mv.max_asn?
749          */
750 
751         if (hwrpb->max_asn != MAX_ASN) {
752                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
753         }
754 
755         /*
756          * Identify the flock of penguins.
757          */
758 
759 #ifdef CONFIG_SMP
760         setup_smp();
761 #endif
762         paging_init();
763 }
764 
765 static char sys_unknown[] = "Unknown";
766 static char systype_names[][16] = {
767         "",
768         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
769         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
770         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
771         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
772         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
773         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
774         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
775 };
776 
777 static char unofficial_names[][8] = {"100", "Ruffian"};
778 
779 static char api_names[][16] = {"200", "Nautilus"};
780 
781 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
782 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
783 
784 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
785 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
786 
787 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
788 static int eb64p_indices[] = {0,0,1,2};
789 
790 static char eb66_names[][8] = {"EB66", "EB66+"};
791 static int eb66_indices[] = {0,0,1};
792 
793 static char marvel_names[][16] = {
794         "Marvel/EV7"
795 };
796 static int marvel_indices[] = { 0 };
797 
798 static char rawhide_names[][16] = {
799         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
800 };
801 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
802 
803 static char titan_names[][16] = {
804         "DEFAULT", "Privateer", "Falcon", "Granite"
805 };
806 static int titan_indices[] = {0,1,2,2,3};
807 
808 static char tsunami_names[][16] = {
809         "", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
810         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
811         "Flying Clipper", "Shark"
812 };
813 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
814 
815 static struct alpha_machine_vector * __init
816 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
817 {
818         static struct alpha_machine_vector *systype_vecs[] __initdata =
819         {
820                 NULL,           /* 0 */
821                 NULL,           /* ADU */
822                 NULL,           /* Cobra */
823                 NULL,           /* Ruby */
824                 NULL,           /* Flamingo */
825                 NULL,           /* Mannequin */
826                 &jensen_mv,
827                 NULL,           /* Pelican */
828                 NULL,           /* Morgan */
829                 NULL,           /* Sable -- see below.  */
830                 NULL,           /* Medulla */
831                 &noname_mv,
832                 NULL,           /* Turbolaser */
833                 &avanti_mv,
834                 NULL,           /* Mustang */
835                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
836                 NULL,           /* Tradewind */
837                 NULL,           /* Mikasa -- see below.  */
838                 NULL,           /* EB64 */
839                 NULL,           /* EB66 -- see variation.  */
840                 NULL,           /* EB64+ -- see variation.  */
841                 &alphabook1_mv,
842                 &rawhide_mv,
843                 NULL,           /* K2 */
844                 &lynx_mv,       /* Lynx */
845                 &xl_mv,
846                 NULL,           /* EB164 -- see variation.  */
847                 NULL,           /* Noritake -- see below.  */
848                 NULL,           /* Cortex */
849                 NULL,           /* 29 */
850                 &miata_mv,
851                 NULL,           /* XXM */
852                 &takara_mv,
853                 NULL,           /* Yukon */
854                 NULL,           /* Tsunami -- see variation.  */
855                 &wildfire_mv,   /* Wildfire */
856                 NULL,           /* CUSCO */
857                 &eiger_mv,      /* Eiger */
858                 NULL,           /* Titan */
859                 NULL,           /* Marvel */
860         };
861 
862         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
863         {
864                 NULL,           /* 100 */
865                 &ruffian_mv,
866         };
867 
868         static struct alpha_machine_vector *api_vecs[] __initdata =
869         {
870                 NULL,           /* 200 */
871                 &nautilus_mv,
872         };
873 
874         static struct alpha_machine_vector *alcor_vecs[] __initdata = 
875         {
876                 &alcor_mv, &xlt_mv, &xlt_mv
877         };
878 
879         static struct alpha_machine_vector *eb164_vecs[] __initdata =
880         {
881                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
882         };
883 
884         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
885         {
886                 &eb64p_mv,
887                 &cabriolet_mv,
888                 &cabriolet_mv           /* AlphaPCI64 */
889         };
890 
891         static struct alpha_machine_vector *eb66_vecs[] __initdata =
892         {
893                 &eb66_mv,
894                 &eb66p_mv
895         };
896 
897         static struct alpha_machine_vector *marvel_vecs[] __initdata =
898         {
899                 &marvel_ev7_mv,
900         };
901 
902         static struct alpha_machine_vector *titan_vecs[] __initdata =
903         {
904                 &titan_mv,              /* default   */
905                 &privateer_mv,          /* privateer */
906                 &titan_mv,              /* falcon    */
907                 &privateer_mv,          /* granite   */
908         };
909 
910         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
911         {
912                 NULL,
913                 &dp264_mv,              /* dp264 */
914                 &dp264_mv,              /* warhol */
915                 &dp264_mv,              /* windjammer */
916                 &monet_mv,              /* monet */
917                 &clipper_mv,            /* clipper */
918                 &dp264_mv,              /* goldrush */
919                 &webbrick_mv,           /* webbrick */
920                 &dp264_mv,              /* catamaran */
921                 NULL,                   /* brisbane? */
922                 NULL,                   /* melbourne? */
923                 NULL,                   /* flying clipper? */
924                 &shark_mv,              /* shark */
925         };
926 
927         /* ??? Do we need to distinguish between Rawhides?  */
928 
929         struct alpha_machine_vector *vec;
930 
931         /* Search the system tables first... */
932         vec = NULL;
933         if (type < ARRAY_SIZE(systype_vecs)) {
934                 vec = systype_vecs[type];
935         } else if ((type > ST_API_BIAS) &&
936                    (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
937                 vec = api_vecs[type - ST_API_BIAS];
938         } else if ((type > ST_UNOFFICIAL_BIAS) &&
939                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
940                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
941         }
942 
943         /* If we've not found one, try for a variation.  */
944 
945         if (!vec) {
946                 /* Member ID is a bit-field. */
947                 unsigned long member = (variation >> 10) & 0x3f;
948 
949                 cpu &= 0xffffffff; /* make it usable */
950 
951                 switch (type) {
952                 case ST_DEC_ALCOR:
953                         if (member < ARRAY_SIZE(alcor_indices))
954                                 vec = alcor_vecs[alcor_indices[member]];
955                         break;
956                 case ST_DEC_EB164:
957                         if (member < ARRAY_SIZE(eb164_indices))
958                                 vec = eb164_vecs[eb164_indices[member]];
959                         /* PC164 may show as EB164 variation with EV56 CPU,
960                            but, since no true EB164 had anything but EV5... */
961                         if (vec == &eb164_mv && cpu == EV56_CPU)
962                                 vec = &pc164_mv;
963                         break;
964                 case ST_DEC_EB64P:
965                         if (member < ARRAY_SIZE(eb64p_indices))
966                                 vec = eb64p_vecs[eb64p_indices[member]];
967                         break;
968                 case ST_DEC_EB66:
969                         if (member < ARRAY_SIZE(eb66_indices))
970                                 vec = eb66_vecs[eb66_indices[member]];
971                         break;
972                 case ST_DEC_MARVEL:
973                         if (member < ARRAY_SIZE(marvel_indices))
974                                 vec = marvel_vecs[marvel_indices[member]];
975                         break;
976                 case ST_DEC_TITAN:
977                         vec = titan_vecs[0];    /* default */
978                         if (member < ARRAY_SIZE(titan_indices))
979                                 vec = titan_vecs[titan_indices[member]];
980                         break;
981                 case ST_DEC_TSUNAMI:
982                         if (member < ARRAY_SIZE(tsunami_indices))
983                                 vec = tsunami_vecs[tsunami_indices[member]];
984                         break;
985                 case ST_DEC_1000:
986                         if (cpu == EV5_CPU || cpu == EV56_CPU)
987                                 vec = &mikasa_primo_mv;
988                         else
989                                 vec = &mikasa_mv;
990                         break;
991                 case ST_DEC_NORITAKE:
992                         if (cpu == EV5_CPU || cpu == EV56_CPU)
993                                 vec = &noritake_primo_mv;
994                         else
995                                 vec = &noritake_mv;
996                         break;
997                 case ST_DEC_2100_A500:
998                         if (cpu == EV5_CPU || cpu == EV56_CPU)
999                                 vec = &sable_gamma_mv;
1000                         else
1001                                 vec = &sable_mv;
1002                         break;
1003                 }
1004         }
1005         return vec;
1006 }
1007 
1008 static struct alpha_machine_vector * __init
1009 get_sysvec_byname(const char *name)
1010 {
1011         static struct alpha_machine_vector *all_vecs[] __initdata =
1012         {
1013                 &alcor_mv,
1014                 &alphabook1_mv,
1015                 &avanti_mv,
1016                 &cabriolet_mv,
1017                 &clipper_mv,
1018                 &dp264_mv,
1019                 &eb164_mv,
1020                 &eb64p_mv,
1021                 &eb66_mv,
1022                 &eb66p_mv,
1023                 &eiger_mv,
1024                 &jensen_mv,
1025                 &lx164_mv,
1026                 &lynx_mv,
1027                 &miata_mv,
1028                 &mikasa_mv,
1029                 &mikasa_primo_mv,
1030                 &monet_mv,
1031                 &nautilus_mv,
1032                 &noname_mv,
1033                 &noritake_mv,
1034                 &noritake_primo_mv,
1035                 &p2k_mv,
1036                 &pc164_mv,
1037                 &privateer_mv,
1038                 &rawhide_mv,
1039                 &ruffian_mv,
1040                 &rx164_mv,
1041                 &sable_mv,
1042                 &sable_gamma_mv,
1043                 &shark_mv,
1044                 &sx164_mv,
1045                 &takara_mv,
1046                 &webbrick_mv,
1047                 &wildfire_mv,
1048                 &xl_mv,
1049                 &xlt_mv
1050         };
1051 
1052         size_t i;
1053 
1054         for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
1055                 struct alpha_machine_vector *mv = all_vecs[i];
1056                 if (strcasecmp(mv->vector_name, name) == 0)
1057                         return mv;
1058         }
1059         return NULL;
1060 }
1061 
1062 static void
1063 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1064              char **type_name, char **variation_name)
1065 {
1066         unsigned long member;
1067 
1068         /* If not in the tables, make it UNKNOWN,
1069            else set type name to family */
1070         if (type < ARRAY_SIZE(systype_names)) {
1071                 *type_name = systype_names[type];
1072         } else if ((type > ST_API_BIAS) &&
1073                    (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
1074                 *type_name = api_names[type - ST_API_BIAS];
1075         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1076                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1077                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1078         } else {
1079                 *type_name = sys_unknown;
1080                 *variation_name = sys_unknown;
1081                 return;
1082         }
1083 
1084         /* Set variation to ""; if variation is zero, done.  */
1085         *variation_name = systype_names[0];
1086         if (variation == 0) {
1087                 return;
1088         }
1089 
1090         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1091 
1092         cpu &= 0xffffffff; /* make it usable */
1093 
1094         switch (type) { /* select by family */
1095         default: /* default to variation "" for now */
1096                 break;
1097         case ST_DEC_EB164:
1098                 if (member >= ARRAY_SIZE(eb164_indices))
1099                         break;
1100                 *variation_name = eb164_names[eb164_indices[member]];
1101                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1102                    so, since no true EB164 had anything but EV5... */
1103                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1104                         *variation_name = eb164_names[1]; /* make it PC164 */
1105                 break;
1106         case ST_DEC_ALCOR:
1107                 if (member < ARRAY_SIZE(alcor_indices))
1108                         *variation_name = alcor_names[alcor_indices[member]];
1109                 break;
1110         case ST_DEC_EB64P:
1111                 if (member < ARRAY_SIZE(eb64p_indices))
1112                         *variation_name = eb64p_names[eb64p_indices[member]];
1113                 break;
1114         case ST_DEC_EB66:
1115                 if (member < ARRAY_SIZE(eb66_indices))
1116                         *variation_name = eb66_names[eb66_indices[member]];
1117                 break;
1118         case ST_DEC_MARVEL:
1119                 if (member < ARRAY_SIZE(marvel_indices))
1120                         *variation_name = marvel_names[marvel_indices[member]];
1121                 break;
1122         case ST_DEC_RAWHIDE:
1123                 if (member < ARRAY_SIZE(rawhide_indices))
1124                         *variation_name = rawhide_names[rawhide_indices[member]];
1125                 break;
1126         case ST_DEC_TITAN:
1127                 *variation_name = titan_names[0];       /* default */
1128                 if (member < ARRAY_SIZE(titan_indices))
1129                         *variation_name = titan_names[titan_indices[member]];
1130                 break;
1131         case ST_DEC_TSUNAMI:
1132                 if (member < ARRAY_SIZE(tsunami_indices))
1133                         *variation_name = tsunami_names[tsunami_indices[member]];
1134                 break;
1135         }
1136 }
1137 
1138 /*
1139  * A change was made to the HWRPB via an ECO and the following code
1140  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1141  * was not implemented in the console firmware.  If it's revision 5 or
1142  * greater we can get the name of the platform as an ASCII string from
1143  * the HWRPB.  That's what this function does.  It checks the revision
1144  * level and if the string is in the HWRPB it returns the address of
1145  * the string--a pointer to the name of the platform.
1146  *
1147  * Returns:
1148  *      - Pointer to a ASCII string if it's in the HWRPB
1149  *      - Pointer to a blank string if the data is not in the HWRPB.
1150  */
1151 
1152 static char *
1153 platform_string(void)
1154 {
1155         struct dsr_struct *dsr;
1156         static char unk_system_string[] = "N/A";
1157 
1158         /* Go to the console for the string pointer.
1159          * If the rpb_vers is not 5 or greater the rpb
1160          * is old and does not have this data in it.
1161          */
1162         if (hwrpb->revision < 5)
1163                 return (unk_system_string);
1164         else {
1165                 /* The Dynamic System Recognition struct
1166                  * has the system platform name starting
1167                  * after the character count of the string.
1168                  */
1169                 dsr =  ((struct dsr_struct *)
1170                         ((char *)hwrpb + hwrpb->dsr_offset));
1171                 return ((char *)dsr + (dsr->sysname_off +
1172                                        sizeof(long)));
1173         }
1174 }
1175 
1176 static int
1177 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1178 {
1179         struct percpu_struct *cpu;
1180         unsigned long i;
1181         int count = 0;
1182 
1183         for (i = 0; i < num; i++) {
1184                 cpu = (struct percpu_struct *)
1185                         ((char *)cpubase + i*hwrpb->processor_size);
1186                 if ((cpu->flags & 0x1cc) == 0x1cc)
1187                         count++;
1188         }
1189         return count;
1190 }
1191 
1192 static void
1193 show_cache_size (struct seq_file *f, const char *which, int shape)
1194 {
1195         if (shape == -1)
1196                 seq_printf (f, "%s\t\t: n/a\n", which);
1197         else if (shape == 0)
1198                 seq_printf (f, "%s\t\t: unknown\n", which);
1199         else
1200                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1201                             which, shape >> 10, shape & 15,
1202                             1 << ((shape >> 4) & 15));
1203 }
1204 
1205 static int
1206 show_cpuinfo(struct seq_file *f, void *slot)
1207 {
1208         extern struct unaligned_stat {
1209                 unsigned long count, va, pc;
1210         } unaligned[2];
1211 
1212         static char cpu_names[][8] = {
1213                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1214                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1215                 "EV68CX", "EV7", "EV79", "EV69"
1216         };
1217 
1218         struct percpu_struct *cpu = slot;
1219         unsigned int cpu_index;
1220         char *cpu_name;
1221         char *systype_name;
1222         char *sysvariation_name;
1223         int nr_processors;
1224         unsigned long timer_freq;
1225 
1226         cpu_index = (unsigned) (cpu->type - 1);
1227         cpu_name = "Unknown";
1228         if (cpu_index < ARRAY_SIZE(cpu_names))
1229                 cpu_name = cpu_names[cpu_index];
1230 
1231         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1232                      cpu->type, &systype_name, &sysvariation_name);
1233 
1234         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1235 
1236 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200
1237         timer_freq = (100UL * hwrpb->intr_freq) / 4096;
1238 #else
1239         timer_freq = 100UL * CONFIG_HZ;
1240 #endif
1241 
1242         seq_printf(f, "cpu\t\t\t: Alpha\n"
1243                       "cpu model\t\t: %s\n"
1244                       "cpu variation\t\t: %ld\n"
1245                       "cpu revision\t\t: %ld\n"
1246                       "cpu serial number\t: %s\n"
1247                       "system type\t\t: %s\n"
1248                       "system variation\t: %s\n"
1249                       "system revision\t\t: %ld\n"
1250                       "system serial number\t: %s\n"
1251                       "cycle frequency [Hz]\t: %lu %s\n"
1252                       "timer frequency [Hz]\t: %lu.%02lu\n"
1253                       "page size [bytes]\t: %ld\n"
1254                       "phys. address bits\t: %ld\n"
1255                       "max. addr. space #\t: %ld\n"
1256                       "BogoMIPS\t\t: %lu.%02lu\n"
1257                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1258                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1259                       "platform string\t\t: %s\n"
1260                       "cpus detected\t\t: %d\n",
1261                        cpu_name, cpu->variation, cpu->revision,
1262                        (char*)cpu->serial_no,
1263                        systype_name, sysvariation_name, hwrpb->sys_revision,
1264                        (char*)hwrpb->ssn,
1265                        est_cycle_freq ? : hwrpb->cycle_freq,
1266                        est_cycle_freq ? "est." : "",
1267                        timer_freq / 100, timer_freq % 100,
1268                        hwrpb->pagesize,
1269                        hwrpb->pa_bits,
1270                        hwrpb->max_asn,
1271                        loops_per_jiffy / (500000/HZ),
1272                        (loops_per_jiffy / (5000/HZ)) % 100,
1273                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1274                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1275                        platform_string(), nr_processors);
1276 
1277 #ifdef CONFIG_SMP
1278         seq_printf(f, "cpus active\t\t: %u\n"
1279                       "cpu active mask\t\t: %016lx\n",
1280                        num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]);
1281 #endif
1282 
1283         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1284         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1285         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1286         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1287 
1288         return 0;
1289 }
1290 
1291 static int __init
1292 read_mem_block(int *addr, int stride, int size)
1293 {
1294         long nloads = size / stride, cnt, tmp;
1295 
1296         __asm__ __volatile__(
1297         "       rpcc    %0\n"
1298         "1:     ldl     %3,0(%2)\n"
1299         "       subq    %1,1,%1\n"
1300         /* Next two XORs introduce an explicit data dependency between
1301            consecutive loads in the loop, which will give us true load
1302            latency. */
1303         "       xor     %3,%2,%2\n"
1304         "       xor     %3,%2,%2\n"
1305         "       addq    %2,%4,%2\n"
1306         "       bne     %1,1b\n"
1307         "       rpcc    %3\n"
1308         "       subl    %3,%0,%0\n"
1309         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1310         : "r" (stride), "1" (nloads), "2" (addr));
1311 
1312         return cnt / (size / stride);
1313 }
1314 
1315 #define CSHAPE(totalsize, linesize, assoc) \
1316   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1317 
1318 /* ??? EV5 supports up to 64M, but did the systems with more than
1319    16M of BCACHE ever exist? */
1320 #define MAX_BCACHE_SIZE 16*1024*1024
1321 
1322 /* Note that the offchip caches are direct mapped on all Alphas. */
1323 static int __init
1324 external_cache_probe(int minsize, int width)
1325 {
1326         int cycles, prev_cycles = 1000000;
1327         int stride = 1 << width;
1328         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1329 
1330         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1331                 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1332 
1333         /* Get the first block cached. */
1334         read_mem_block(__va(0), stride, size);
1335 
1336         while (size < maxsize) {
1337                 /* Get an average load latency in cycles. */
1338                 cycles = read_mem_block(__va(0), stride, size);
1339                 if (cycles > prev_cycles * 2) {
1340                         /* Fine, we exceed the cache. */
1341                         printk("%ldK Bcache detected; load hit latency %d "
1342                                "cycles, load miss latency %d cycles\n",
1343                                size >> 11, prev_cycles, cycles);
1344                         return CSHAPE(size >> 1, width, 1);
1345                 }
1346                 /* Try to get the next block cached. */
1347                 read_mem_block(__va(size), stride, size);
1348                 prev_cycles = cycles;
1349                 size <<= 1;
1350         }
1351         return -1;      /* No BCACHE found. */
1352 }
1353 
1354 static void __init
1355 determine_cpu_caches (unsigned int cpu_type)
1356 {
1357         int L1I, L1D, L2, L3;
1358 
1359         switch (cpu_type) {
1360         case EV4_CPU:
1361         case EV45_CPU:
1362           {
1363                 if (cpu_type == EV4_CPU)
1364                         L1I = CSHAPE(8*1024, 5, 1);
1365                 else
1366                         L1I = CSHAPE(16*1024, 5, 1);
1367                 L1D = L1I;
1368                 L3 = -1;
1369         
1370                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1371                    shadow copy, and may be available from some versions
1372                    of the CSERVE PALcall.  If we can get it, then
1373 
1374                         unsigned long biu_ctl, size;
1375                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1376                         L2 = CSHAPE (size, 5, 1);
1377 
1378                    Unfortunately, we can't rely on that.
1379                 */
1380                 L2 = external_cache_probe(128*1024, 5);
1381                 break;
1382           }
1383 
1384         case LCA4_CPU:
1385           {
1386                 unsigned long car, size;
1387 
1388                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1389                 L3 = -1;
1390 
1391                 car = *(vuip) phys_to_virt (0x120000078UL);
1392                 size = 64*1024 * (1 << ((car >> 5) & 7));
1393                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1394                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1395                 break;
1396           }
1397 
1398         case EV5_CPU:
1399         case EV56_CPU:
1400           {
1401                 unsigned long sc_ctl, width;
1402 
1403                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1404 
1405                 /* Check the line size of the Scache.  */
1406                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1407                 width = sc_ctl & 0x1000 ? 6 : 5;
1408                 L2 = CSHAPE (96*1024, width, 3);
1409 
1410                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1411                    has a shadow copy, and may be available from some versions
1412                    of the CSERVE PALcall.  If we can get it, then
1413 
1414                         unsigned long bc_control, bc_config, size;
1415                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1416                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1417 
1418                    Unfortunately, we can't rely on that.
1419                 */
1420                 L3 = external_cache_probe(1024*1024, width);
1421                 break;
1422           }
1423 
1424         case PCA56_CPU:
1425         case PCA57_CPU:
1426           {
1427                 if (cpu_type == PCA56_CPU) {
1428                         L1I = CSHAPE(16*1024, 6, 1);
1429                         L1D = CSHAPE(8*1024, 5, 1);
1430                 } else {
1431                         L1I = CSHAPE(32*1024, 6, 2);
1432                         L1D = CSHAPE(16*1024, 5, 1);
1433                 }
1434                 L3 = -1;
1435 
1436 #if 0
1437                 unsigned long cbox_config, size;
1438 
1439                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1440                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1441 
1442                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1443 #else
1444                 L2 = external_cache_probe(512*1024, 6);
1445 #endif
1446                 break;
1447           }
1448 
1449         case EV6_CPU:
1450         case EV67_CPU:
1451         case EV68CB_CPU:
1452         case EV68AL_CPU:
1453         case EV68CX_CPU:
1454         case EV69_CPU:
1455                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1456                 L2 = external_cache_probe(1024*1024, 6);
1457                 L3 = -1;
1458                 break;
1459 
1460         case EV7_CPU:
1461         case EV79_CPU:
1462                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1463                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1464                 L3 = -1;
1465                 break;
1466 
1467         default:
1468                 /* Nothing known about this cpu type.  */
1469                 L1I = L1D = L2 = L3 = 0;
1470                 break;
1471         }
1472 
1473         alpha_l1i_cacheshape = L1I;
1474         alpha_l1d_cacheshape = L1D;
1475         alpha_l2_cacheshape = L2;
1476         alpha_l3_cacheshape = L3;
1477 }
1478 
1479 /*
1480  * We show only CPU #0 info.
1481  */
1482 static void *
1483 c_start(struct seq_file *f, loff_t *pos)
1484 {
1485         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1486 }
1487 
1488 static void *
1489 c_next(struct seq_file *f, void *v, loff_t *pos)
1490 {
1491         return NULL;
1492 }
1493 
1494 static void
1495 c_stop(struct seq_file *f, void *v)
1496 {
1497 }
1498 
1499 const struct seq_operations cpuinfo_op = {
1500         .start  = c_start,
1501         .next   = c_next,
1502         .stop   = c_stop,
1503         .show   = show_cpuinfo,
1504 };
1505 
1506 
1507 static int
1508 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1509 {
1510 #if 1
1511         /* FIXME FIXME FIXME */
1512         /* If we are using SRM and serial console, just hard halt here. */
1513         if (alpha_using_srm && srmcons_output)
1514                 __halt();
1515 #endif
1516         return NOTIFY_DONE;
1517 }
1518 
1519 static __init int add_pcspkr(void)
1520 {
1521         struct platform_device *pd;
1522         int ret;
1523 
1524         pd = platform_device_alloc("pcspkr", -1);
1525         if (!pd)
1526                 return -ENOMEM;
1527 
1528         ret = platform_device_add(pd);
1529         if (ret)
1530                 platform_device_put(pd);
1531 
1532         return ret;
1533 }
1534 device_initcall(add_pcspkr);
1535 

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