[PATCH] tty: Remove include of screen_info.h from tty.h
[linux-2.6.git] / arch / alpha / kernel / setup.c
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/a.out.h>
22 #include <linux/screen_info.h>
23 #include <linux/delay.h>
24 #include <linux/config.h>       /* CONFIG_ALPHA_LCA etc */
25 #include <linux/mc146818rtc.h>
26 #include <linux/console.h>
27 #include <linux/cpu.h>
28 #include <linux/errno.h>
29 #include <linux/init.h>
30 #include <linux/string.h>
31 #include <linux/ioport.h>
32 #include <linux/platform_device.h>
33 #include <linux/bootmem.h>
34 #include <linux/pci.h>
35 #include <linux/seq_file.h>
36 #include <linux/root_dev.h>
37 #include <linux/initrd.h>
38 #include <linux/eisa.h>
39 #include <linux/pfn.h>
40 #ifdef CONFIG_MAGIC_SYSRQ
41 #include <linux/sysrq.h>
42 #include <linux/reboot.h>
43 #endif
44 #include <linux/notifier.h>
45 #include <asm/setup.h>
46 #include <asm/io.h>
47
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/system.h>
59 #include <asm/hwrpb.h>
60 #include <asm/dma.h>
61 #include <asm/io.h>
62 #include <asm/mmu_context.h>
63 #include <asm/console.h>
64
65 #include "proto.h"
66 #include "pci_impl.h"
67
68
69 struct hwrpb_struct *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 /* Which processor we booted from.  */
84 int boot_cpuid;
85
86 /*
87  * Using SRM callbacks for initial console output. This works from
88  * setup_arch() time through the end of time_init(), as those places
89  * are under our (Alpha) control.
90
91  * "srmcons" specified in the boot command arguments allows us to
92  * see kernel messages during the period of time before the true
93  * console device is "registered" during console_init(). 
94  * As of this version (2.5.59), console_init() will call
95  * disable_early_printk() as the last action before initializing
96  * the console drivers. That's the last possible time srmcons can be 
97  * unregistered without interfering with console behavior.
98  *
99  * By default, OFF; set it with a bootcommand arg of "srmcons" or 
100  * "console=srm". The meaning of these two args is:
101  *     "srmcons"     - early callback prints 
102  *     "console=srm" - full callback based console, including early prints
103  */
104 int srmcons_output = 0;
105
106 /* Enforce a memory size limit; useful for testing. By default, none. */
107 unsigned long mem_size_limit = 0;
108
109 /* Set AGP GART window size (0 means disabled). */
110 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
111
112 #ifdef CONFIG_ALPHA_GENERIC
113 struct alpha_machine_vector alpha_mv;
114 int alpha_using_srm;
115 #endif
116
117 #define N(a) (sizeof(a)/sizeof(a[0]))
118
119 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
120                                                unsigned long);
121 static struct alpha_machine_vector *get_sysvec_byname(const char *);
122 static void get_sysnames(unsigned long, unsigned long, unsigned long,
123                          char **, char **);
124 static void determine_cpu_caches (unsigned int);
125
126 static char command_line[COMMAND_LINE_SIZE];
127
128 /*
129  * The format of "screen_info" is strange, and due to early
130  * i386-setup code. This is just enough to make the console
131  * code think we're on a VGA color display.
132  */
133
134 struct screen_info screen_info = {
135         .orig_x = 0,
136         .orig_y = 25,
137         .orig_video_cols = 80,
138         .orig_video_lines = 25,
139         .orig_video_isVGA = 1,
140         .orig_video_points = 16
141 };
142
143 /*
144  * The direct map I/O window, if any.  This should be the same
145  * for all busses, since it's used by virt_to_bus.
146  */
147
148 unsigned long __direct_map_base;
149 unsigned long __direct_map_size;
150
151 /*
152  * Declare all of the machine vectors.
153  */
154
155 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either 
156    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
157    to the assembler.  */
158
159 #define WEAK(X) \
160         extern struct alpha_machine_vector X; \
161         asm(".weak "#X)
162
163 WEAK(alcor_mv);
164 WEAK(alphabook1_mv);
165 WEAK(avanti_mv);
166 WEAK(cabriolet_mv);
167 WEAK(clipper_mv);
168 WEAK(dp264_mv);
169 WEAK(eb164_mv);
170 WEAK(eb64p_mv);
171 WEAK(eb66_mv);
172 WEAK(eb66p_mv);
173 WEAK(eiger_mv);
174 WEAK(jensen_mv);
175 WEAK(lx164_mv);
176 WEAK(lynx_mv);
177 WEAK(marvel_ev7_mv);
178 WEAK(miata_mv);
179 WEAK(mikasa_mv);
180 WEAK(mikasa_primo_mv);
181 WEAK(monet_mv);
182 WEAK(nautilus_mv);
183 WEAK(noname_mv);
184 WEAK(noritake_mv);
185 WEAK(noritake_primo_mv);
186 WEAK(p2k_mv);
187 WEAK(pc164_mv);
188 WEAK(privateer_mv);
189 WEAK(rawhide_mv);
190 WEAK(ruffian_mv);
191 WEAK(rx164_mv);
192 WEAK(sable_mv);
193 WEAK(sable_gamma_mv);
194 WEAK(shark_mv);
195 WEAK(sx164_mv);
196 WEAK(takara_mv);
197 WEAK(titan_mv);
198 WEAK(webbrick_mv);
199 WEAK(wildfire_mv);
200 WEAK(xl_mv);
201 WEAK(xlt_mv);
202
203 #undef WEAK
204
205 /*
206  * I/O resources inherited from PeeCees.  Except for perhaps the
207  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
208  *
209  * ??? If this becomes less standard, move the struct out into the
210  * machine vector.
211  */
212
213 static void __init
214 reserve_std_resources(void)
215 {
216         static struct resource standard_io_resources[] = {
217                 { .name = "rtc", .start = -1, .end = -1 },
218                 { .name = "dma1", .start = 0x00, .end = 0x1f },
219                 { .name = "pic1", .start = 0x20, .end = 0x3f },
220                 { .name = "timer", .start = 0x40, .end = 0x5f },
221                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
222                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
223                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
224                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
225         };
226
227         struct resource *io = &ioport_resource;
228         size_t i;
229
230         if (hose_head) {
231                 struct pci_controller *hose;
232                 for (hose = hose_head; hose; hose = hose->next)
233                         if (hose->index == 0) {
234                                 io = hose->io_space;
235                                 break;
236                         }
237         }
238
239         /* Fix up for the Jensen's queer RTC placement.  */
240         standard_io_resources[0].start = RTC_PORT(0);
241         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
242
243         for (i = 0; i < N(standard_io_resources); ++i)
244                 request_resource(io, standard_io_resources+i);
245 }
246
247 #define PFN_MAX         PFN_DOWN(0x80000000)
248 #define for_each_mem_cluster(memdesc, cluster, i)               \
249         for ((cluster) = (memdesc)->cluster, (i) = 0;           \
250              (i) < (memdesc)->numclusters; (i)++, (cluster)++)
251
252 static unsigned long __init
253 get_mem_size_limit(char *s)
254 {
255         unsigned long end = 0;
256         char *from = s;
257
258         end = simple_strtoul(from, &from, 0);
259         if ( *from == 'K' || *from == 'k' ) {
260                 end = end << 10;
261                 from++;
262         } else if ( *from == 'M' || *from == 'm' ) {
263                 end = end << 20;
264                 from++;
265         } else if ( *from == 'G' || *from == 'g' ) {
266                 end = end << 30;
267                 from++;
268         }
269         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
270 }
271
272 #ifdef CONFIG_BLK_DEV_INITRD
273 void * __init
274 move_initrd(unsigned long mem_limit)
275 {
276         void *start;
277         unsigned long size;
278
279         size = initrd_end - initrd_start;
280         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
281         if (!start || __pa(start) + size > mem_limit) {
282                 initrd_start = initrd_end = 0;
283                 return NULL;
284         }
285         memmove(start, (void *)initrd_start, size);
286         initrd_start = (unsigned long)start;
287         initrd_end = initrd_start + size;
288         printk("initrd moved to %p\n", start);
289         return start;
290 }
291 #endif
292
293 #ifndef CONFIG_DISCONTIGMEM
294 static void __init
295 setup_memory(void *kernel_end)
296 {
297         struct memclust_struct * cluster;
298         struct memdesc_struct * memdesc;
299         unsigned long start_kernel_pfn, end_kernel_pfn;
300         unsigned long bootmap_size, bootmap_pages, bootmap_start;
301         unsigned long start, end;
302         unsigned long i;
303
304         /* Find free clusters, and init and free the bootmem accordingly.  */
305         memdesc = (struct memdesc_struct *)
306           (hwrpb->mddt_offset + (unsigned long) hwrpb);
307
308         for_each_mem_cluster(memdesc, cluster, i) {
309                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
310                        i, cluster->usage, cluster->start_pfn,
311                        cluster->start_pfn + cluster->numpages);
312
313                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
314                    non-volatile memory -- we might want to mark
315                    this for later.  */
316                 if (cluster->usage & 3)
317                         continue;
318
319                 end = cluster->start_pfn + cluster->numpages;
320                 if (end > max_low_pfn)
321                         max_low_pfn = end;
322         }
323
324         /*
325          * Except for the NUMA systems (wildfire, marvel) all of the 
326          * Alpha systems we run on support 32GB of memory or less.
327          * Since the NUMA systems introduce large holes in memory addressing,
328          * we can get into a situation where there is not enough contiguous
329          * memory for the memory map. 
330          *
331          * Limit memory to the first 32GB to limit the NUMA systems to 
332          * memory on their first node (wildfire) or 2 (marvel) to avoid 
333          * not being able to produce the memory map. In order to access 
334          * all of the memory on the NUMA systems, build with discontiguous
335          * memory support.
336          *
337          * If the user specified a memory limit, let that memory limit stand.
338          */
339         if (!mem_size_limit) 
340                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
341
342         if (mem_size_limit && max_low_pfn >= mem_size_limit)
343         {
344                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
345                        mem_size_limit << (PAGE_SHIFT - 10),
346                        max_low_pfn    << (PAGE_SHIFT - 10));
347                 max_low_pfn = mem_size_limit;
348         }
349
350         /* Find the bounds of kernel memory.  */
351         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
352         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
353         bootmap_start = -1;
354
355  try_again:
356         if (max_low_pfn <= end_kernel_pfn)
357                 panic("not enough memory to boot");
358
359         /* We need to know how many physically contiguous pages
360            we'll need for the bootmap.  */
361         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
362
363         /* Now find a good region where to allocate the bootmap.  */
364         for_each_mem_cluster(memdesc, cluster, i) {
365                 if (cluster->usage & 3)
366                         continue;
367
368                 start = cluster->start_pfn;
369                 end = start + cluster->numpages;
370                 if (start >= max_low_pfn)
371                         continue;
372                 if (end > max_low_pfn)
373                         end = max_low_pfn;
374                 if (start < start_kernel_pfn) {
375                         if (end > end_kernel_pfn
376                             && end - end_kernel_pfn >= bootmap_pages) {
377                                 bootmap_start = end_kernel_pfn;
378                                 break;
379                         } else if (end > start_kernel_pfn)
380                                 end = start_kernel_pfn;
381                 } else if (start < end_kernel_pfn)
382                         start = end_kernel_pfn;
383                 if (end - start >= bootmap_pages) {
384                         bootmap_start = start;
385                         break;
386                 }
387         }
388
389         if (bootmap_start == ~0UL) {
390                 max_low_pfn >>= 1;
391                 goto try_again;
392         }
393
394         /* Allocate the bootmap and mark the whole MM as reserved.  */
395         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
396
397         /* Mark the free regions.  */
398         for_each_mem_cluster(memdesc, cluster, i) {
399                 if (cluster->usage & 3)
400                         continue;
401
402                 start = cluster->start_pfn;
403                 end = cluster->start_pfn + cluster->numpages;
404                 if (start >= max_low_pfn)
405                         continue;
406                 if (end > max_low_pfn)
407                         end = max_low_pfn;
408                 if (start < start_kernel_pfn) {
409                         if (end > end_kernel_pfn) {
410                                 free_bootmem(PFN_PHYS(start),
411                                              (PFN_PHYS(start_kernel_pfn)
412                                               - PFN_PHYS(start)));
413                                 printk("freeing pages %ld:%ld\n",
414                                        start, start_kernel_pfn);
415                                 start = end_kernel_pfn;
416                         } else if (end > start_kernel_pfn)
417                                 end = start_kernel_pfn;
418                 } else if (start < end_kernel_pfn)
419                         start = end_kernel_pfn;
420                 if (start >= end)
421                         continue;
422
423                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
424                 printk("freeing pages %ld:%ld\n", start, end);
425         }
426
427         /* Reserve the bootmap memory.  */
428         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size);
429         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
430
431 #ifdef CONFIG_BLK_DEV_INITRD
432         initrd_start = INITRD_START;
433         if (initrd_start) {
434                 initrd_end = initrd_start+INITRD_SIZE;
435                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
436                        (void *) initrd_start, INITRD_SIZE);
437
438                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
439                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
440                                 printk("initrd extends beyond end of memory "
441                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
442                                        initrd_end,
443                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
444                 } else {
445                         reserve_bootmem(virt_to_phys((void *)initrd_start),
446                                         INITRD_SIZE);
447                 }
448         }
449 #endif /* CONFIG_BLK_DEV_INITRD */
450 }
451 #else
452 extern void setup_memory(void *);
453 #endif /* !CONFIG_DISCONTIGMEM */
454
455 int __init
456 page_is_ram(unsigned long pfn)
457 {
458         struct memclust_struct * cluster;
459         struct memdesc_struct * memdesc;
460         unsigned long i;
461
462         memdesc = (struct memdesc_struct *)
463                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
464         for_each_mem_cluster(memdesc, cluster, i)
465         {
466                 if (pfn >= cluster->start_pfn  &&
467                     pfn < cluster->start_pfn + cluster->numpages) {
468                         return (cluster->usage & 3) ? 0 : 1;
469                 }
470         }
471
472         return 0;
473 }
474
475 static int __init
476 register_cpus(void)
477 {
478         int i;
479
480         for_each_possible_cpu(i) {
481                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
482                 if (!p)
483                         return -ENOMEM;
484                 register_cpu(p, i);
485         }
486         return 0;
487 }
488
489 arch_initcall(register_cpus);
490
491 void __init
492 setup_arch(char **cmdline_p)
493 {
494         extern char _end[];
495
496         struct alpha_machine_vector *vec = NULL;
497         struct percpu_struct *cpu;
498         char *type_name, *var_name, *p;
499         void *kernel_end = _end; /* end of kernel */
500         char *args = command_line;
501
502         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
503         boot_cpuid = hard_smp_processor_id();
504
505         /*
506          * Pre-process the system type to make sure it will be valid.
507          *
508          * This may restore real CABRIO and EB66+ family names, ie
509          * EB64+ and EB66.
510          *
511          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
512          * and AS1200 (DIGITAL Server 5000 series) have the type as
513          * the negative of the real one.
514          */
515         if ((long)hwrpb->sys_type < 0) {
516                 hwrpb->sys_type = -((long)hwrpb->sys_type);
517                 hwrpb_update_checksum(hwrpb);
518         }
519
520         /* Register a call for panic conditions. */
521         atomic_notifier_chain_register(&panic_notifier_list,
522                         &alpha_panic_block);
523
524 #ifdef CONFIG_ALPHA_GENERIC
525         /* Assume that we've booted from SRM if we haven't booted from MILO.
526            Detect the later by looking for "MILO" in the system serial nr.  */
527         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
528 #endif
529
530         /* If we are using SRM, we want to allow callbacks
531            as early as possible, so do this NOW, and then
532            they should work immediately thereafter.
533         */
534         kernel_end = callback_init(kernel_end);
535
536         /* 
537          * Locate the command line.
538          */
539         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
540            boot flags depending on the boot mode, we need some shorthand.
541            This should do for installation.  */
542         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
543                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
544         } else {
545                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
546         }
547         strcpy(saved_command_line, command_line);
548         *cmdline_p = command_line;
549
550         /* 
551          * Process command-line arguments.
552          */
553         while ((p = strsep(&args, " \t")) != NULL) {
554                 if (!*p) continue;
555                 if (strncmp(p, "alpha_mv=", 9) == 0) {
556                         vec = get_sysvec_byname(p+9);
557                         continue;
558                 }
559                 if (strncmp(p, "cycle=", 6) == 0) {
560                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
561                         continue;
562                 }
563                 if (strncmp(p, "mem=", 4) == 0) {
564                         mem_size_limit = get_mem_size_limit(p+4);
565                         continue;
566                 }
567                 if (strncmp(p, "srmcons", 7) == 0) {
568                         srmcons_output |= 1;
569                         continue;
570                 }
571                 if (strncmp(p, "console=srm", 11) == 0) {
572                         srmcons_output |= 2;
573                         continue;
574                 }
575                 if (strncmp(p, "gartsize=", 9) == 0) {
576                         alpha_agpgart_size =
577                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
578                         continue;
579                 }
580 #ifdef CONFIG_VERBOSE_MCHECK
581                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
582                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
583                         continue;
584                 }
585 #endif
586         }
587
588         /* Replace the command line, now that we've killed it with strsep.  */
589         strcpy(command_line, saved_command_line);
590
591         /* If we want SRM console printk echoing early, do it now. */
592         if (alpha_using_srm && srmcons_output) {
593                 register_srm_console();
594
595                 /*
596                  * If "console=srm" was specified, clear the srmcons_output
597                  * flag now so that time.c won't unregister_srm_console
598                  */
599                 if (srmcons_output & 2)
600                         srmcons_output = 0;
601         }
602
603 #ifdef CONFIG_MAGIC_SYSRQ
604         /* If we're using SRM, make sysrq-b halt back to the prom,
605            not auto-reboot.  */
606         if (alpha_using_srm) {
607                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
608                 op->handler = (void *) machine_halt;
609         }
610 #endif
611
612         /*
613          * Identify and reconfigure for the current system.
614          */
615         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
616
617         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
618                      cpu->type, &type_name, &var_name);
619         if (*var_name == '0')
620                 var_name = "";
621
622         if (!vec) {
623                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
624                                  cpu->type);
625         }
626
627         if (!vec) {
628                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
629                       type_name, (*var_name ? " variation " : ""), var_name,
630                       hwrpb->sys_type, hwrpb->sys_variation);
631         }
632         if (vec != &alpha_mv) {
633                 alpha_mv = *vec;
634         }
635         
636         printk("Booting "
637 #ifdef CONFIG_ALPHA_GENERIC
638                "GENERIC "
639 #endif
640                "on %s%s%s using machine vector %s from %s\n",
641                type_name, (*var_name ? " variation " : ""),
642                var_name, alpha_mv.vector_name,
643                (alpha_using_srm ? "SRM" : "MILO"));
644
645         printk("Major Options: "
646 #ifdef CONFIG_SMP
647                "SMP "
648 #endif
649 #ifdef CONFIG_ALPHA_EV56
650                "EV56 "
651 #endif
652 #ifdef CONFIG_ALPHA_EV67
653                "EV67 "
654 #endif
655 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
656                "LEGACY_START "
657 #endif
658 #ifdef CONFIG_VERBOSE_MCHECK
659                "VERBOSE_MCHECK "
660 #endif
661
662 #ifdef CONFIG_DISCONTIGMEM
663                "DISCONTIGMEM "
664 #ifdef CONFIG_NUMA
665                "NUMA "
666 #endif
667 #endif
668
669 #ifdef CONFIG_DEBUG_SPINLOCK
670                "DEBUG_SPINLOCK "
671 #endif
672 #ifdef CONFIG_MAGIC_SYSRQ
673                "MAGIC_SYSRQ "
674 #endif
675                "\n");
676
677         printk("Command line: %s\n", command_line);
678
679         /* 
680          * Sync up the HAE.
681          * Save the SRM's current value for restoration.
682          */
683         srm_hae = *alpha_mv.hae_register;
684         __set_hae(alpha_mv.hae_cache);
685
686         /* Reset enable correctable error reports.  */
687         wrmces(0x7);
688
689         /* Find our memory.  */
690         setup_memory(kernel_end);
691
692         /* First guess at cpu cache sizes.  Do this before init_arch.  */
693         determine_cpu_caches(cpu->type);
694
695         /* Initialize the machine.  Usually has to do with setting up
696            DMA windows and the like.  */
697         if (alpha_mv.init_arch)
698                 alpha_mv.init_arch();
699
700         /* Reserve standard resources.  */
701         reserve_std_resources();
702
703         /* 
704          * Give us a default console.  TGA users will see nothing until
705          * chr_dev_init is called, rather late in the boot sequence.
706          */
707
708 #ifdef CONFIG_VT
709 #if defined(CONFIG_VGA_CONSOLE)
710         conswitchp = &vga_con;
711 #elif defined(CONFIG_DUMMY_CONSOLE)
712         conswitchp = &dummy_con;
713 #endif
714 #endif
715
716         /* Default root filesystem to sda2.  */
717         ROOT_DEV = Root_SDA2;
718
719 #ifdef CONFIG_EISA
720         /* FIXME:  only set this when we actually have EISA in this box? */
721         EISA_bus = 1;
722 #endif
723
724         /*
725          * Check ASN in HWRPB for validity, report if bad.
726          * FIXME: how was this failing?  Should we trust it instead,
727          * and copy the value into alpha_mv.max_asn?
728          */
729
730         if (hwrpb->max_asn != MAX_ASN) {
731                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
732         }
733
734         /*
735          * Identify the flock of penguins.
736          */
737
738 #ifdef CONFIG_SMP
739         setup_smp();
740 #endif
741         paging_init();
742 }
743
744 void __init
745 disable_early_printk(void)
746 {
747         if (alpha_using_srm && srmcons_output) {
748                 unregister_srm_console();
749                 srmcons_output = 0;
750         }
751 }
752
753 static char sys_unknown[] = "Unknown";
754 static char systype_names[][16] = {
755         "0",
756         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
757         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
758         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
759         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
760         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
761         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
762         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
763 };
764
765 static char unofficial_names[][8] = {"100", "Ruffian"};
766
767 static char api_names[][16] = {"200", "Nautilus"};
768
769 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
770 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
771
772 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
773 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
774
775 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
776 static int eb64p_indices[] = {0,0,1,2};
777
778 static char eb66_names[][8] = {"EB66", "EB66+"};
779 static int eb66_indices[] = {0,0,1};
780
781 static char marvel_names[][16] = {
782         "Marvel/EV7"
783 };
784 static int marvel_indices[] = { 0 };
785
786 static char rawhide_names[][16] = {
787         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
788 };
789 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
790
791 static char titan_names[][16] = {
792         "DEFAULT", "Privateer", "Falcon", "Granite"
793 };
794 static int titan_indices[] = {0,1,2,2,3};
795
796 static char tsunami_names[][16] = {
797         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
798         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
799         "Flying Clipper", "Shark"
800 };
801 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
802
803 static struct alpha_machine_vector * __init
804 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
805 {
806         static struct alpha_machine_vector *systype_vecs[] __initdata =
807         {
808                 NULL,           /* 0 */
809                 NULL,           /* ADU */
810                 NULL,           /* Cobra */
811                 NULL,           /* Ruby */
812                 NULL,           /* Flamingo */
813                 NULL,           /* Mannequin */
814                 &jensen_mv,
815                 NULL,           /* Pelican */
816                 NULL,           /* Morgan */
817                 NULL,           /* Sable -- see below.  */
818                 NULL,           /* Medulla */
819                 &noname_mv,
820                 NULL,           /* Turbolaser */
821                 &avanti_mv,
822                 NULL,           /* Mustang */
823                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
824                 NULL,           /* Tradewind */
825                 NULL,           /* Mikasa -- see below.  */
826                 NULL,           /* EB64 */
827                 NULL,           /* EB66 -- see variation.  */
828                 NULL,           /* EB64+ -- see variation.  */
829                 &alphabook1_mv,
830                 &rawhide_mv,
831                 NULL,           /* K2 */
832                 &lynx_mv,       /* Lynx */
833                 &xl_mv,
834                 NULL,           /* EB164 -- see variation.  */
835                 NULL,           /* Noritake -- see below.  */
836                 NULL,           /* Cortex */
837                 NULL,           /* 29 */
838                 &miata_mv,
839                 NULL,           /* XXM */
840                 &takara_mv,
841                 NULL,           /* Yukon */
842                 NULL,           /* Tsunami -- see variation.  */
843                 &wildfire_mv,   /* Wildfire */
844                 NULL,           /* CUSCO */
845                 &eiger_mv,      /* Eiger */
846                 NULL,           /* Titan */
847                 NULL,           /* Marvel */
848         };
849
850         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
851         {
852                 NULL,           /* 100 */
853                 &ruffian_mv,
854         };
855
856         static struct alpha_machine_vector *api_vecs[] __initdata =
857         {
858                 NULL,           /* 200 */
859                 &nautilus_mv,
860         };
861
862         static struct alpha_machine_vector *alcor_vecs[] __initdata = 
863         {
864                 &alcor_mv, &xlt_mv, &xlt_mv
865         };
866
867         static struct alpha_machine_vector *eb164_vecs[] __initdata =
868         {
869                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
870         };
871
872         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
873         {
874                 &eb64p_mv,
875                 &cabriolet_mv,
876                 &cabriolet_mv           /* AlphaPCI64 */
877         };
878
879         static struct alpha_machine_vector *eb66_vecs[] __initdata =
880         {
881                 &eb66_mv,
882                 &eb66p_mv
883         };
884
885         static struct alpha_machine_vector *marvel_vecs[] __initdata =
886         {
887                 &marvel_ev7_mv,
888         };
889
890         static struct alpha_machine_vector *titan_vecs[] __initdata =
891         {
892                 &titan_mv,              /* default   */
893                 &privateer_mv,          /* privateer */
894                 &titan_mv,              /* falcon    */
895                 &privateer_mv,          /* granite   */
896         };
897
898         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
899         {
900                 NULL,
901                 &dp264_mv,              /* dp264 */
902                 &dp264_mv,              /* warhol */
903                 &dp264_mv,              /* windjammer */
904                 &monet_mv,              /* monet */
905                 &clipper_mv,            /* clipper */
906                 &dp264_mv,              /* goldrush */
907                 &webbrick_mv,           /* webbrick */
908                 &dp264_mv,              /* catamaran */
909                 NULL,                   /* brisbane? */
910                 NULL,                   /* melbourne? */
911                 NULL,                   /* flying clipper? */
912                 &shark_mv,              /* shark */
913         };
914
915         /* ??? Do we need to distinguish between Rawhides?  */
916
917         struct alpha_machine_vector *vec;
918
919         /* Search the system tables first... */
920         vec = NULL;
921         if (type < N(systype_vecs)) {
922                 vec = systype_vecs[type];
923         } else if ((type > ST_API_BIAS) &&
924                    (type - ST_API_BIAS) < N(api_vecs)) {
925                 vec = api_vecs[type - ST_API_BIAS];
926         } else if ((type > ST_UNOFFICIAL_BIAS) &&
927                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_vecs)) {
928                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
929         }
930
931         /* If we've not found one, try for a variation.  */
932
933         if (!vec) {
934                 /* Member ID is a bit-field. */
935                 unsigned long member = (variation >> 10) & 0x3f;
936
937                 cpu &= 0xffffffff; /* make it usable */
938
939                 switch (type) {
940                 case ST_DEC_ALCOR:
941                         if (member < N(alcor_indices))
942                                 vec = alcor_vecs[alcor_indices[member]];
943                         break;
944                 case ST_DEC_EB164:
945                         if (member < N(eb164_indices))
946                                 vec = eb164_vecs[eb164_indices[member]];
947                         /* PC164 may show as EB164 variation with EV56 CPU,
948                            but, since no true EB164 had anything but EV5... */
949                         if (vec == &eb164_mv && cpu == EV56_CPU)
950                                 vec = &pc164_mv;
951                         break;
952                 case ST_DEC_EB64P:
953                         if (member < N(eb64p_indices))
954                                 vec = eb64p_vecs[eb64p_indices[member]];
955                         break;
956                 case ST_DEC_EB66:
957                         if (member < N(eb66_indices))
958                                 vec = eb66_vecs[eb66_indices[member]];
959                         break;
960                 case ST_DEC_MARVEL:
961                         if (member < N(marvel_indices))
962                                 vec = marvel_vecs[marvel_indices[member]];
963                         break;
964                 case ST_DEC_TITAN:
965                         vec = titan_vecs[0];    /* default */
966                         if (member < N(titan_indices))
967                                 vec = titan_vecs[titan_indices[member]];
968                         break;
969                 case ST_DEC_TSUNAMI:
970                         if (member < N(tsunami_indices))
971                                 vec = tsunami_vecs[tsunami_indices[member]];
972                         break;
973                 case ST_DEC_1000:
974                         if (cpu == EV5_CPU || cpu == EV56_CPU)
975                                 vec = &mikasa_primo_mv;
976                         else
977                                 vec = &mikasa_mv;
978                         break;
979                 case ST_DEC_NORITAKE:
980                         if (cpu == EV5_CPU || cpu == EV56_CPU)
981                                 vec = &noritake_primo_mv;
982                         else
983                                 vec = &noritake_mv;
984                         break;
985                 case ST_DEC_2100_A500:
986                         if (cpu == EV5_CPU || cpu == EV56_CPU)
987                                 vec = &sable_gamma_mv;
988                         else
989                                 vec = &sable_mv;
990                         break;
991                 }
992         }
993         return vec;
994 }
995
996 static struct alpha_machine_vector * __init
997 get_sysvec_byname(const char *name)
998 {
999         static struct alpha_machine_vector *all_vecs[] __initdata =
1000         {
1001                 &alcor_mv,
1002                 &alphabook1_mv,
1003                 &avanti_mv,
1004                 &cabriolet_mv,
1005                 &clipper_mv,
1006                 &dp264_mv,
1007                 &eb164_mv,
1008                 &eb64p_mv,
1009                 &eb66_mv,
1010                 &eb66p_mv,
1011                 &eiger_mv,
1012                 &jensen_mv,
1013                 &lx164_mv,
1014                 &lynx_mv,
1015                 &miata_mv,
1016                 &mikasa_mv,
1017                 &mikasa_primo_mv,
1018                 &monet_mv,
1019                 &nautilus_mv,
1020                 &noname_mv,
1021                 &noritake_mv,
1022                 &noritake_primo_mv,
1023                 &p2k_mv,
1024                 &pc164_mv,
1025                 &privateer_mv,
1026                 &rawhide_mv,
1027                 &ruffian_mv,
1028                 &rx164_mv,
1029                 &sable_mv,
1030                 &sable_gamma_mv,
1031                 &shark_mv,
1032                 &sx164_mv,
1033                 &takara_mv,
1034                 &webbrick_mv,
1035                 &wildfire_mv,
1036                 &xl_mv,
1037                 &xlt_mv
1038         };
1039
1040         size_t i;
1041
1042         for (i = 0; i < N(all_vecs); ++i) {
1043                 struct alpha_machine_vector *mv = all_vecs[i];
1044                 if (strcasecmp(mv->vector_name, name) == 0)
1045                         return mv;
1046         }
1047         return NULL;
1048 }
1049
1050 static void
1051 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1052              char **type_name, char **variation_name)
1053 {
1054         unsigned long member;
1055
1056         /* If not in the tables, make it UNKNOWN,
1057            else set type name to family */
1058         if (type < N(systype_names)) {
1059                 *type_name = systype_names[type];
1060         } else if ((type > ST_API_BIAS) &&
1061                    (type - ST_API_BIAS) < N(api_names)) {
1062                 *type_name = api_names[type - ST_API_BIAS];
1063         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1064                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_names)) {
1065                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1066         } else {
1067                 *type_name = sys_unknown;
1068                 *variation_name = sys_unknown;
1069                 return;
1070         }
1071
1072         /* Set variation to "0"; if variation is zero, done.  */
1073         *variation_name = systype_names[0];
1074         if (variation == 0) {
1075                 return;
1076         }
1077
1078         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1079
1080         cpu &= 0xffffffff; /* make it usable */
1081
1082         switch (type) { /* select by family */
1083         default: /* default to variation "0" for now */
1084                 break;
1085         case ST_DEC_EB164:
1086                 if (member < N(eb164_indices))
1087                         *variation_name = eb164_names[eb164_indices[member]];
1088                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1089                    so, since no true EB164 had anything but EV5... */
1090                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1091                         *variation_name = eb164_names[1]; /* make it PC164 */
1092                 break;
1093         case ST_DEC_ALCOR:
1094                 if (member < N(alcor_indices))
1095                         *variation_name = alcor_names[alcor_indices[member]];
1096                 break;
1097         case ST_DEC_EB64P:
1098                 if (member < N(eb64p_indices))
1099                         *variation_name = eb64p_names[eb64p_indices[member]];
1100                 break;
1101         case ST_DEC_EB66:
1102                 if (member < N(eb66_indices))
1103                         *variation_name = eb66_names[eb66_indices[member]];
1104                 break;
1105         case ST_DEC_MARVEL:
1106                 if (member < N(marvel_indices))
1107                         *variation_name = marvel_names[marvel_indices[member]];
1108                 break;
1109         case ST_DEC_RAWHIDE:
1110                 if (member < N(rawhide_indices))
1111                         *variation_name = rawhide_names[rawhide_indices[member]];
1112                 break;
1113         case ST_DEC_TITAN:
1114                 *variation_name = titan_names[0];       /* default */
1115                 if (member < N(titan_indices))
1116                         *variation_name = titan_names[titan_indices[member]];
1117                 break;
1118         case ST_DEC_TSUNAMI:
1119                 if (member < N(tsunami_indices))
1120                         *variation_name = tsunami_names[tsunami_indices[member]];
1121                 break;
1122         }
1123 }
1124
1125 /*
1126  * A change was made to the HWRPB via an ECO and the following code
1127  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1128  * was not implemented in the console firmware.  If it's revision 5 or
1129  * greater we can get the name of the platform as an ASCII string from
1130  * the HWRPB.  That's what this function does.  It checks the revision
1131  * level and if the string is in the HWRPB it returns the address of
1132  * the string--a pointer to the name of the platform.
1133  *
1134  * Returns:
1135  *      - Pointer to a ASCII string if it's in the HWRPB
1136  *      - Pointer to a blank string if the data is not in the HWRPB.
1137  */
1138
1139 static char *
1140 platform_string(void)
1141 {
1142         struct dsr_struct *dsr;
1143         static char unk_system_string[] = "N/A";
1144
1145         /* Go to the console for the string pointer.
1146          * If the rpb_vers is not 5 or greater the rpb
1147          * is old and does not have this data in it.
1148          */
1149         if (hwrpb->revision < 5)
1150                 return (unk_system_string);
1151         else {
1152                 /* The Dynamic System Recognition struct
1153                  * has the system platform name starting
1154                  * after the character count of the string.
1155                  */
1156                 dsr =  ((struct dsr_struct *)
1157                         ((char *)hwrpb + hwrpb->dsr_offset));
1158                 return ((char *)dsr + (dsr->sysname_off +
1159                                        sizeof(long)));
1160         }
1161 }
1162
1163 static int
1164 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1165 {
1166         struct percpu_struct *cpu;
1167         unsigned long i;
1168         int count = 0;
1169
1170         for (i = 0; i < num; i++) {
1171                 cpu = (struct percpu_struct *)
1172                         ((char *)cpubase + i*hwrpb->processor_size);
1173                 if ((cpu->flags & 0x1cc) == 0x1cc)
1174                         count++;
1175         }
1176         return count;
1177 }
1178
1179 static void
1180 show_cache_size (struct seq_file *f, const char *which, int shape)
1181 {
1182         if (shape == -1)
1183                 seq_printf (f, "%s\t\t: n/a\n", which);
1184         else if (shape == 0)
1185                 seq_printf (f, "%s\t\t: unknown\n", which);
1186         else
1187                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1188                             which, shape >> 10, shape & 15,
1189                             1 << ((shape >> 4) & 15));
1190 }
1191
1192 static int
1193 show_cpuinfo(struct seq_file *f, void *slot)
1194 {
1195         extern struct unaligned_stat {
1196                 unsigned long count, va, pc;
1197         } unaligned[2];
1198
1199         static char cpu_names[][8] = {
1200                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1201                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1202                 "EV68CX", "EV7", "EV79", "EV69"
1203         };
1204
1205         struct percpu_struct *cpu = slot;
1206         unsigned int cpu_index;
1207         char *cpu_name;
1208         char *systype_name;
1209         char *sysvariation_name;
1210         int nr_processors;
1211
1212         cpu_index = (unsigned) (cpu->type - 1);
1213         cpu_name = "Unknown";
1214         if (cpu_index < N(cpu_names))
1215                 cpu_name = cpu_names[cpu_index];
1216
1217         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1218                      cpu->type, &systype_name, &sysvariation_name);
1219
1220         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1221
1222         seq_printf(f, "cpu\t\t\t: Alpha\n"
1223                       "cpu model\t\t: %s\n"
1224                       "cpu variation\t\t: %ld\n"
1225                       "cpu revision\t\t: %ld\n"
1226                       "cpu serial number\t: %s\n"
1227                       "system type\t\t: %s\n"
1228                       "system variation\t: %s\n"
1229                       "system revision\t\t: %ld\n"
1230                       "system serial number\t: %s\n"
1231                       "cycle frequency [Hz]\t: %lu %s\n"
1232                       "timer frequency [Hz]\t: %lu.%02lu\n"
1233                       "page size [bytes]\t: %ld\n"
1234                       "phys. address bits\t: %ld\n"
1235                       "max. addr. space #\t: %ld\n"
1236                       "BogoMIPS\t\t: %lu.%02lu\n"
1237                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1238                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1239                       "platform string\t\t: %s\n"
1240                       "cpus detected\t\t: %d\n",
1241                        cpu_name, cpu->variation, cpu->revision,
1242                        (char*)cpu->serial_no,
1243                        systype_name, sysvariation_name, hwrpb->sys_revision,
1244                        (char*)hwrpb->ssn,
1245                        est_cycle_freq ? : hwrpb->cycle_freq,
1246                        est_cycle_freq ? "est." : "",
1247                        hwrpb->intr_freq / 4096,
1248                        (100 * hwrpb->intr_freq / 4096) % 100,
1249                        hwrpb->pagesize,
1250                        hwrpb->pa_bits,
1251                        hwrpb->max_asn,
1252                        loops_per_jiffy / (500000/HZ),
1253                        (loops_per_jiffy / (5000/HZ)) % 100,
1254                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1255                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1256                        platform_string(), nr_processors);
1257
1258 #ifdef CONFIG_SMP
1259         seq_printf(f, "cpus active\t\t: %d\n"
1260                       "cpu active mask\t\t: %016lx\n",
1261                        num_online_cpus(), cpus_addr(cpu_possible_map)[0]);
1262 #endif
1263
1264         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1265         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1266         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1267         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1268
1269         return 0;
1270 }
1271
1272 static int __init
1273 read_mem_block(int *addr, int stride, int size)
1274 {
1275         long nloads = size / stride, cnt, tmp;
1276
1277         __asm__ __volatile__(
1278         "       rpcc    %0\n"
1279         "1:     ldl     %3,0(%2)\n"
1280         "       subq    %1,1,%1\n"
1281         /* Next two XORs introduce an explicit data dependency between
1282            consecutive loads in the loop, which will give us true load
1283            latency. */
1284         "       xor     %3,%2,%2\n"
1285         "       xor     %3,%2,%2\n"
1286         "       addq    %2,%4,%2\n"
1287         "       bne     %1,1b\n"
1288         "       rpcc    %3\n"
1289         "       subl    %3,%0,%0\n"
1290         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1291         : "r" (stride), "1" (nloads), "2" (addr));
1292
1293         return cnt / (size / stride);
1294 }
1295
1296 #define CSHAPE(totalsize, linesize, assoc) \
1297   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1298
1299 /* ??? EV5 supports up to 64M, but did the systems with more than
1300    16M of BCACHE ever exist? */
1301 #define MAX_BCACHE_SIZE 16*1024*1024
1302
1303 /* Note that the offchip caches are direct mapped on all Alphas. */
1304 static int __init
1305 external_cache_probe(int minsize, int width)
1306 {
1307         int cycles, prev_cycles = 1000000;
1308         int stride = 1 << width;
1309         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1310
1311         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1312                 maxsize = 1 << (floor_log2(max_low_pfn + 1) + PAGE_SHIFT);
1313
1314         /* Get the first block cached. */
1315         read_mem_block(__va(0), stride, size);
1316
1317         while (size < maxsize) {
1318                 /* Get an average load latency in cycles. */
1319                 cycles = read_mem_block(__va(0), stride, size);
1320                 if (cycles > prev_cycles * 2) {
1321                         /* Fine, we exceed the cache. */
1322                         printk("%ldK Bcache detected; load hit latency %d "
1323                                "cycles, load miss latency %d cycles\n",
1324                                size >> 11, prev_cycles, cycles);
1325                         return CSHAPE(size >> 1, width, 1);
1326                 }
1327                 /* Try to get the next block cached. */
1328                 read_mem_block(__va(size), stride, size);
1329                 prev_cycles = cycles;
1330                 size <<= 1;
1331         }
1332         return -1;      /* No BCACHE found. */
1333 }
1334
1335 static void __init
1336 determine_cpu_caches (unsigned int cpu_type)
1337 {
1338         int L1I, L1D, L2, L3;
1339
1340         switch (cpu_type) {
1341         case EV4_CPU:
1342         case EV45_CPU:
1343           {
1344                 if (cpu_type == EV4_CPU)
1345                         L1I = CSHAPE(8*1024, 5, 1);
1346                 else
1347                         L1I = CSHAPE(16*1024, 5, 1);
1348                 L1D = L1I;
1349                 L3 = -1;
1350         
1351                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1352                    shadow copy, and may be available from some versions
1353                    of the CSERVE PALcall.  If we can get it, then
1354
1355                         unsigned long biu_ctl, size;
1356                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1357                         L2 = CSHAPE (size, 5, 1);
1358
1359                    Unfortunately, we can't rely on that.
1360                 */
1361                 L2 = external_cache_probe(128*1024, 5);
1362                 break;
1363           }
1364
1365         case LCA4_CPU:
1366           {
1367                 unsigned long car, size;
1368
1369                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1370                 L3 = -1;
1371
1372                 car = *(vuip) phys_to_virt (0x120000078UL);
1373                 size = 64*1024 * (1 << ((car >> 5) & 7));
1374                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1375                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1376                 break;
1377           }
1378
1379         case EV5_CPU:
1380         case EV56_CPU:
1381           {
1382                 unsigned long sc_ctl, width;
1383
1384                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1385
1386                 /* Check the line size of the Scache.  */
1387                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1388                 width = sc_ctl & 0x1000 ? 6 : 5;
1389                 L2 = CSHAPE (96*1024, width, 3);
1390
1391                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1392                    has a shadow copy, and may be available from some versions
1393                    of the CSERVE PALcall.  If we can get it, then
1394
1395                         unsigned long bc_control, bc_config, size;
1396                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1397                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1398
1399                    Unfortunately, we can't rely on that.
1400                 */
1401                 L3 = external_cache_probe(1024*1024, width);
1402                 break;
1403           }
1404
1405         case PCA56_CPU:
1406         case PCA57_CPU:
1407           {
1408                 unsigned long cbox_config, size;
1409
1410                 if (cpu_type == PCA56_CPU) {
1411                         L1I = CSHAPE(16*1024, 6, 1);
1412                         L1D = CSHAPE(8*1024, 5, 1);
1413                 } else {
1414                         L1I = CSHAPE(32*1024, 6, 2);
1415                         L1D = CSHAPE(16*1024, 5, 1);
1416                 }
1417                 L3 = -1;
1418
1419                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1420                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1421
1422 #if 0
1423                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1424 #else
1425                 L2 = external_cache_probe(512*1024, 6);
1426 #endif
1427                 break;
1428           }
1429
1430         case EV6_CPU:
1431         case EV67_CPU:
1432         case EV68CB_CPU:
1433         case EV68AL_CPU:
1434         case EV68CX_CPU:
1435         case EV69_CPU:
1436                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1437                 L2 = external_cache_probe(1024*1024, 6);
1438                 L3 = -1;
1439                 break;
1440
1441         case EV7_CPU:
1442         case EV79_CPU:
1443                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1444                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1445                 L3 = -1;
1446                 break;
1447
1448         default:
1449                 /* Nothing known about this cpu type.  */
1450                 L1I = L1D = L2 = L3 = 0;
1451                 break;
1452         }
1453
1454         alpha_l1i_cacheshape = L1I;
1455         alpha_l1d_cacheshape = L1D;
1456         alpha_l2_cacheshape = L2;
1457         alpha_l3_cacheshape = L3;
1458 }
1459
1460 /*
1461  * We show only CPU #0 info.
1462  */
1463 static void *
1464 c_start(struct seq_file *f, loff_t *pos)
1465 {
1466         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1467 }
1468
1469 static void *
1470 c_next(struct seq_file *f, void *v, loff_t *pos)
1471 {
1472         return NULL;
1473 }
1474
1475 static void
1476 c_stop(struct seq_file *f, void *v)
1477 {
1478 }
1479
1480 struct seq_operations cpuinfo_op = {
1481         .start  = c_start,
1482         .next   = c_next,
1483         .stop   = c_stop,
1484         .show   = show_cpuinfo,
1485 };
1486
1487
1488 static int
1489 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1490 {
1491 #if 1
1492         /* FIXME FIXME FIXME */
1493         /* If we are using SRM and serial console, just hard halt here. */
1494         if (alpha_using_srm && srmcons_output)
1495                 __halt();
1496 #endif
1497         return NOTIFY_DONE;
1498 }
1499
1500 static __init int add_pcspkr(void)
1501 {
1502         struct platform_device *pd;
1503         int ret;
1504
1505         pd = platform_device_alloc("pcspkr", -1);
1506         if (!pd)
1507                 return -ENOMEM;
1508
1509         ret = platform_device_add(pd);
1510         if (ret)
1511                 platform_device_put(pd);
1512
1513         return ret;
1514 }
1515 device_initcall(add_pcspkr);