74c3466256586800730be7e19c94421a2050b877
[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/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
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/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 /* 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 EXPORT_SYMBOL(alpha_using_srm);
116 #endif
117
118 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
119                                                unsigned long);
120 static struct alpha_machine_vector *get_sysvec_byname(const char *);
121 static void get_sysnames(unsigned long, unsigned long, unsigned long,
122                          char **, char **);
123 static void determine_cpu_caches (unsigned int);
124
125 static char __initdata command_line[COMMAND_LINE_SIZE];
126
127 /*
128  * The format of "screen_info" is strange, and due to early
129  * i386-setup code. This is just enough to make the console
130  * code think we're on a VGA color display.
131  */
132
133 struct screen_info screen_info = {
134         .orig_x = 0,
135         .orig_y = 25,
136         .orig_video_cols = 80,
137         .orig_video_lines = 25,
138         .orig_video_isVGA = 1,
139         .orig_video_points = 16
140 };
141
142 EXPORT_SYMBOL(screen_info);
143
144 /*
145  * The direct map I/O window, if any.  This should be the same
146  * for all busses, since it's used by virt_to_bus.
147  */
148
149 unsigned long __direct_map_base;
150 unsigned long __direct_map_size;
151 EXPORT_SYMBOL(__direct_map_base);
152 EXPORT_SYMBOL(__direct_map_size);
153
154 /*
155  * Declare all of the machine vectors.
156  */
157
158 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either 
159    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
160    to the assembler.  */
161
162 #define WEAK(X) \
163         extern struct alpha_machine_vector X; \
164         asm(".weak "#X)
165
166 WEAK(alcor_mv);
167 WEAK(alphabook1_mv);
168 WEAK(avanti_mv);
169 WEAK(cabriolet_mv);
170 WEAK(clipper_mv);
171 WEAK(dp264_mv);
172 WEAK(eb164_mv);
173 WEAK(eb64p_mv);
174 WEAK(eb66_mv);
175 WEAK(eb66p_mv);
176 WEAK(eiger_mv);
177 WEAK(jensen_mv);
178 WEAK(lx164_mv);
179 WEAK(lynx_mv);
180 WEAK(marvel_ev7_mv);
181 WEAK(miata_mv);
182 WEAK(mikasa_mv);
183 WEAK(mikasa_primo_mv);
184 WEAK(monet_mv);
185 WEAK(nautilus_mv);
186 WEAK(noname_mv);
187 WEAK(noritake_mv);
188 WEAK(noritake_primo_mv);
189 WEAK(p2k_mv);
190 WEAK(pc164_mv);
191 WEAK(privateer_mv);
192 WEAK(rawhide_mv);
193 WEAK(ruffian_mv);
194 WEAK(rx164_mv);
195 WEAK(sable_mv);
196 WEAK(sable_gamma_mv);
197 WEAK(shark_mv);
198 WEAK(sx164_mv);
199 WEAK(takara_mv);
200 WEAK(titan_mv);
201 WEAK(webbrick_mv);
202 WEAK(wildfire_mv);
203 WEAK(xl_mv);
204 WEAK(xlt_mv);
205
206 #undef WEAK
207
208 /*
209  * I/O resources inherited from PeeCees.  Except for perhaps the
210  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
211  *
212  * ??? If this becomes less standard, move the struct out into the
213  * machine vector.
214  */
215
216 static void __init
217 reserve_std_resources(void)
218 {
219         static struct resource standard_io_resources[] = {
220                 { .name = "rtc", .start = -1, .end = -1 },
221                 { .name = "dma1", .start = 0x00, .end = 0x1f },
222                 { .name = "pic1", .start = 0x20, .end = 0x3f },
223                 { .name = "timer", .start = 0x40, .end = 0x5f },
224                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
225                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
226                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
227                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
228         };
229
230         struct resource *io = &ioport_resource;
231         size_t i;
232
233         if (hose_head) {
234                 struct pci_controller *hose;
235                 for (hose = hose_head; hose; hose = hose->next)
236                         if (hose->index == 0) {
237                                 io = hose->io_space;
238                                 break;
239                         }
240         }
241
242         /* Fix up for the Jensen's queer RTC placement.  */
243         standard_io_resources[0].start = RTC_PORT(0);
244         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
245
246         for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
247                 request_resource(io, standard_io_resources+i);
248 }
249
250 #define PFN_MAX         PFN_DOWN(0x80000000)
251 #define for_each_mem_cluster(memdesc, cluster, i)               \
252         for ((cluster) = (memdesc)->cluster, (i) = 0;           \
253              (i) < (memdesc)->numclusters; (i)++, (cluster)++)
254
255 static unsigned long __init
256 get_mem_size_limit(char *s)
257 {
258         unsigned long end = 0;
259         char *from = s;
260
261         end = simple_strtoul(from, &from, 0);
262         if ( *from == 'K' || *from == 'k' ) {
263                 end = end << 10;
264                 from++;
265         } else if ( *from == 'M' || *from == 'm' ) {
266                 end = end << 20;
267                 from++;
268         } else if ( *from == 'G' || *from == 'g' ) {
269                 end = end << 30;
270                 from++;
271         }
272         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
273 }
274
275 #ifdef CONFIG_BLK_DEV_INITRD
276 void * __init
277 move_initrd(unsigned long mem_limit)
278 {
279         void *start;
280         unsigned long size;
281
282         size = initrd_end - initrd_start;
283         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
284         if (!start || __pa(start) + size > mem_limit) {
285                 initrd_start = initrd_end = 0;
286                 return NULL;
287         }
288         memmove(start, (void *)initrd_start, size);
289         initrd_start = (unsigned long)start;
290         initrd_end = initrd_start + size;
291         printk("initrd moved to %p\n", start);
292         return start;
293 }
294 #endif
295
296 #ifndef CONFIG_DISCONTIGMEM
297 static void __init
298 setup_memory(void *kernel_end)
299 {
300         struct memclust_struct * cluster;
301         struct memdesc_struct * memdesc;
302         unsigned long start_kernel_pfn, end_kernel_pfn;
303         unsigned long bootmap_size, bootmap_pages, bootmap_start;
304         unsigned long start, end;
305         unsigned long i;
306
307         /* Find free clusters, and init and free the bootmem accordingly.  */
308         memdesc = (struct memdesc_struct *)
309           (hwrpb->mddt_offset + (unsigned long) hwrpb);
310
311         for_each_mem_cluster(memdesc, cluster, i) {
312                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
313                        i, cluster->usage, cluster->start_pfn,
314                        cluster->start_pfn + cluster->numpages);
315
316                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
317                    non-volatile memory -- we might want to mark
318                    this for later.  */
319                 if (cluster->usage & 3)
320                         continue;
321
322                 end = cluster->start_pfn + cluster->numpages;
323                 if (end > max_low_pfn)
324                         max_low_pfn = end;
325         }
326
327         /*
328          * Except for the NUMA systems (wildfire, marvel) all of the 
329          * Alpha systems we run on support 32GB of memory or less.
330          * Since the NUMA systems introduce large holes in memory addressing,
331          * we can get into a situation where there is not enough contiguous
332          * memory for the memory map. 
333          *
334          * Limit memory to the first 32GB to limit the NUMA systems to 
335          * memory on their first node (wildfire) or 2 (marvel) to avoid 
336          * not being able to produce the memory map. In order to access 
337          * all of the memory on the NUMA systems, build with discontiguous
338          * memory support.
339          *
340          * If the user specified a memory limit, let that memory limit stand.
341          */
342         if (!mem_size_limit) 
343                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
344
345         if (mem_size_limit && max_low_pfn >= mem_size_limit)
346         {
347                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
348                        mem_size_limit << (PAGE_SHIFT - 10),
349                        max_low_pfn    << (PAGE_SHIFT - 10));
350                 max_low_pfn = mem_size_limit;
351         }
352
353         /* Find the bounds of kernel memory.  */
354         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
355         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
356         bootmap_start = -1;
357
358  try_again:
359         if (max_low_pfn <= end_kernel_pfn)
360                 panic("not enough memory to boot");
361
362         /* We need to know how many physically contiguous pages
363            we'll need for the bootmap.  */
364         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
365
366         /* Now find a good region where to allocate the bootmap.  */
367         for_each_mem_cluster(memdesc, cluster, i) {
368                 if (cluster->usage & 3)
369                         continue;
370
371                 start = cluster->start_pfn;
372                 end = start + cluster->numpages;
373                 if (start >= max_low_pfn)
374                         continue;
375                 if (end > max_low_pfn)
376                         end = max_low_pfn;
377                 if (start < start_kernel_pfn) {
378                         if (end > end_kernel_pfn
379                             && end - end_kernel_pfn >= bootmap_pages) {
380                                 bootmap_start = end_kernel_pfn;
381                                 break;
382                         } else if (end > start_kernel_pfn)
383                                 end = start_kernel_pfn;
384                 } else if (start < end_kernel_pfn)
385                         start = end_kernel_pfn;
386                 if (end - start >= bootmap_pages) {
387                         bootmap_start = start;
388                         break;
389                 }
390         }
391
392         if (bootmap_start == ~0UL) {
393                 max_low_pfn >>= 1;
394                 goto try_again;
395         }
396
397         /* Allocate the bootmap and mark the whole MM as reserved.  */
398         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
399
400         /* Mark the free regions.  */
401         for_each_mem_cluster(memdesc, cluster, i) {
402                 if (cluster->usage & 3)
403                         continue;
404
405                 start = cluster->start_pfn;
406                 end = cluster->start_pfn + cluster->numpages;
407                 if (start >= max_low_pfn)
408                         continue;
409                 if (end > max_low_pfn)
410                         end = max_low_pfn;
411                 if (start < start_kernel_pfn) {
412                         if (end > end_kernel_pfn) {
413                                 free_bootmem(PFN_PHYS(start),
414                                              (PFN_PHYS(start_kernel_pfn)
415                                               - PFN_PHYS(start)));
416                                 printk("freeing pages %ld:%ld\n",
417                                        start, start_kernel_pfn);
418                                 start = end_kernel_pfn;
419                         } else if (end > start_kernel_pfn)
420                                 end = start_kernel_pfn;
421                 } else if (start < end_kernel_pfn)
422                         start = end_kernel_pfn;
423                 if (start >= end)
424                         continue;
425
426                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
427                 printk("freeing pages %ld:%ld\n", start, end);
428         }
429
430         /* Reserve the bootmap memory.  */
431         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size,
432                         BOOTMEM_DEFAULT);
433         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
434
435 #ifdef CONFIG_BLK_DEV_INITRD
436         initrd_start = INITRD_START;
437         if (initrd_start) {
438                 initrd_end = initrd_start+INITRD_SIZE;
439                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
440                        (void *) initrd_start, INITRD_SIZE);
441
442                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
443                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
444                                 printk("initrd extends beyond end of memory "
445                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
446                                        initrd_end,
447                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
448                 } else {
449                         reserve_bootmem(virt_to_phys((void *)initrd_start),
450                                         INITRD_SIZE, BOOTMEM_DEFAULT);
451                 }
452         }
453 #endif /* CONFIG_BLK_DEV_INITRD */
454 }
455 #else
456 extern void setup_memory(void *);
457 #endif /* !CONFIG_DISCONTIGMEM */
458
459 int __init
460 page_is_ram(unsigned long pfn)
461 {
462         struct memclust_struct * cluster;
463         struct memdesc_struct * memdesc;
464         unsigned long i;
465
466         memdesc = (struct memdesc_struct *)
467                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
468         for_each_mem_cluster(memdesc, cluster, i)
469         {
470                 if (pfn >= cluster->start_pfn  &&
471                     pfn < cluster->start_pfn + cluster->numpages) {
472                         return (cluster->usage & 3) ? 0 : 1;
473                 }
474         }
475
476         return 0;
477 }
478
479 static int __init
480 register_cpus(void)
481 {
482         int i;
483
484         for_each_possible_cpu(i) {
485                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
486                 if (!p)
487                         return -ENOMEM;
488                 register_cpu(p, i);
489         }
490         return 0;
491 }
492
493 arch_initcall(register_cpus);
494
495 void __init
496 setup_arch(char **cmdline_p)
497 {
498         extern char _end[];
499
500         struct alpha_machine_vector *vec = NULL;
501         struct percpu_struct *cpu;
502         char *type_name, *var_name, *p;
503         void *kernel_end = _end; /* end of kernel */
504         char *args = command_line;
505
506         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
507         boot_cpuid = hard_smp_processor_id();
508
509         /*
510          * Pre-process the system type to make sure it will be valid.
511          *
512          * This may restore real CABRIO and EB66+ family names, ie
513          * EB64+ and EB66.
514          *
515          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
516          * and AS1200 (DIGITAL Server 5000 series) have the type as
517          * the negative of the real one.
518          */
519         if ((long)hwrpb->sys_type < 0) {
520                 hwrpb->sys_type = -((long)hwrpb->sys_type);
521                 hwrpb_update_checksum(hwrpb);
522         }
523
524         /* Register a call for panic conditions. */
525         atomic_notifier_chain_register(&panic_notifier_list,
526                         &alpha_panic_block);
527
528 #ifdef CONFIG_ALPHA_GENERIC
529         /* Assume that we've booted from SRM if we haven't booted from MILO.
530            Detect the later by looking for "MILO" in the system serial nr.  */
531         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
532 #endif
533
534         /* If we are using SRM, we want to allow callbacks
535            as early as possible, so do this NOW, and then
536            they should work immediately thereafter.
537         */
538         kernel_end = callback_init(kernel_end);
539
540         /* 
541          * Locate the command line.
542          */
543         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
544            boot flags depending on the boot mode, we need some shorthand.
545            This should do for installation.  */
546         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
547                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
548         } else {
549                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
550         }
551         strcpy(boot_command_line, command_line);
552         *cmdline_p = command_line;
553
554         /* 
555          * Process command-line arguments.
556          */
557         while ((p = strsep(&args, " \t")) != NULL) {
558                 if (!*p) continue;
559                 if (strncmp(p, "alpha_mv=", 9) == 0) {
560                         vec = get_sysvec_byname(p+9);
561                         continue;
562                 }
563                 if (strncmp(p, "cycle=", 6) == 0) {
564                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
565                         continue;
566                 }
567                 if (strncmp(p, "mem=", 4) == 0) {
568                         mem_size_limit = get_mem_size_limit(p+4);
569                         continue;
570                 }
571                 if (strncmp(p, "srmcons", 7) == 0) {
572                         srmcons_output |= 1;
573                         continue;
574                 }
575                 if (strncmp(p, "console=srm", 11) == 0) {
576                         srmcons_output |= 2;
577                         continue;
578                 }
579                 if (strncmp(p, "gartsize=", 9) == 0) {
580                         alpha_agpgart_size =
581                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
582                         continue;
583                 }
584 #ifdef CONFIG_VERBOSE_MCHECK
585                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
586                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
587                         continue;
588                 }
589 #endif
590         }
591
592         /* Replace the command line, now that we've killed it with strsep.  */
593         strcpy(command_line, boot_command_line);
594
595         /* If we want SRM console printk echoing early, do it now. */
596         if (alpha_using_srm && srmcons_output) {
597                 register_srm_console();
598
599                 /*
600                  * If "console=srm" was specified, clear the srmcons_output
601                  * flag now so that time.c won't unregister_srm_console
602                  */
603                 if (srmcons_output & 2)
604                         srmcons_output = 0;
605         }
606
607 #ifdef CONFIG_MAGIC_SYSRQ
608         /* If we're using SRM, make sysrq-b halt back to the prom,
609            not auto-reboot.  */
610         if (alpha_using_srm) {
611                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
612                 op->handler = (void *) machine_halt;
613         }
614 #endif
615
616         /*
617          * Identify and reconfigure for the current system.
618          */
619         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
620
621         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
622                      cpu->type, &type_name, &var_name);
623         if (*var_name == '0')
624                 var_name = "";
625
626         if (!vec) {
627                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
628                                  cpu->type);
629         }
630
631         if (!vec) {
632                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
633                       type_name, (*var_name ? " variation " : ""), var_name,
634                       hwrpb->sys_type, hwrpb->sys_variation);
635         }
636         if (vec != &alpha_mv) {
637                 alpha_mv = *vec;
638         }
639         
640         printk("Booting "
641 #ifdef CONFIG_ALPHA_GENERIC
642                "GENERIC "
643 #endif
644                "on %s%s%s using machine vector %s from %s\n",
645                type_name, (*var_name ? " variation " : ""),
646                var_name, alpha_mv.vector_name,
647                (alpha_using_srm ? "SRM" : "MILO"));
648
649         printk("Major Options: "
650 #ifdef CONFIG_SMP
651                "SMP "
652 #endif
653 #ifdef CONFIG_ALPHA_EV56
654                "EV56 "
655 #endif
656 #ifdef CONFIG_ALPHA_EV67
657                "EV67 "
658 #endif
659 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
660                "LEGACY_START "
661 #endif
662 #ifdef CONFIG_VERBOSE_MCHECK
663                "VERBOSE_MCHECK "
664 #endif
665
666 #ifdef CONFIG_DISCONTIGMEM
667                "DISCONTIGMEM "
668 #ifdef CONFIG_NUMA
669                "NUMA "
670 #endif
671 #endif
672
673 #ifdef CONFIG_DEBUG_SPINLOCK
674                "DEBUG_SPINLOCK "
675 #endif
676 #ifdef CONFIG_MAGIC_SYSRQ
677                "MAGIC_SYSRQ "
678 #endif
679                "\n");
680
681         printk("Command line: %s\n", command_line);
682
683         /* 
684          * Sync up the HAE.
685          * Save the SRM's current value for restoration.
686          */
687         srm_hae = *alpha_mv.hae_register;
688         __set_hae(alpha_mv.hae_cache);
689
690         /* Reset enable correctable error reports.  */
691         wrmces(0x7);
692
693         /* Find our memory.  */
694         setup_memory(kernel_end);
695
696         /* First guess at cpu cache sizes.  Do this before init_arch.  */
697         determine_cpu_caches(cpu->type);
698
699         /* Initialize the machine.  Usually has to do with setting up
700            DMA windows and the like.  */
701         if (alpha_mv.init_arch)
702                 alpha_mv.init_arch();
703
704         /* Reserve standard resources.  */
705         reserve_std_resources();
706
707         /* 
708          * Give us a default console.  TGA users will see nothing until
709          * chr_dev_init is called, rather late in the boot sequence.
710          */
711
712 #ifdef CONFIG_VT
713 #if defined(CONFIG_VGA_CONSOLE)
714         conswitchp = &vga_con;
715 #elif defined(CONFIG_DUMMY_CONSOLE)
716         conswitchp = &dummy_con;
717 #endif
718 #endif
719
720         /* Default root filesystem to sda2.  */
721         ROOT_DEV = Root_SDA2;
722
723 #ifdef CONFIG_EISA
724         /* FIXME:  only set this when we actually have EISA in this box? */
725         EISA_bus = 1;
726 #endif
727
728         /*
729          * Check ASN in HWRPB for validity, report if bad.
730          * FIXME: how was this failing?  Should we trust it instead,
731          * and copy the value into alpha_mv.max_asn?
732          */
733
734         if (hwrpb->max_asn != MAX_ASN) {
735                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
736         }
737
738         /*
739          * Identify the flock of penguins.
740          */
741
742 #ifdef CONFIG_SMP
743         setup_smp();
744 #endif
745         paging_init();
746 }
747
748 static char sys_unknown[] = "Unknown";
749 static char systype_names[][16] = {
750         "0",
751         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
752         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
753         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
754         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
755         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
756         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
757         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
758 };
759
760 static char unofficial_names[][8] = {"100", "Ruffian"};
761
762 static char api_names[][16] = {"200", "Nautilus"};
763
764 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
765 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
766
767 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
768 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
769
770 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
771 static int eb64p_indices[] = {0,0,1,2};
772
773 static char eb66_names[][8] = {"EB66", "EB66+"};
774 static int eb66_indices[] = {0,0,1};
775
776 static char marvel_names[][16] = {
777         "Marvel/EV7"
778 };
779 static int marvel_indices[] = { 0 };
780
781 static char rawhide_names[][16] = {
782         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
783 };
784 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
785
786 static char titan_names[][16] = {
787         "DEFAULT", "Privateer", "Falcon", "Granite"
788 };
789 static int titan_indices[] = {0,1,2,2,3};
790
791 static char tsunami_names[][16] = {
792         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
793         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
794         "Flying Clipper", "Shark"
795 };
796 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
797
798 static struct alpha_machine_vector * __init
799 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
800 {
801         static struct alpha_machine_vector *systype_vecs[] __initdata =
802         {
803                 NULL,           /* 0 */
804                 NULL,           /* ADU */
805                 NULL,           /* Cobra */
806                 NULL,           /* Ruby */
807                 NULL,           /* Flamingo */
808                 NULL,           /* Mannequin */
809                 &jensen_mv,
810                 NULL,           /* Pelican */
811                 NULL,           /* Morgan */
812                 NULL,           /* Sable -- see below.  */
813                 NULL,           /* Medulla */
814                 &noname_mv,
815                 NULL,           /* Turbolaser */
816                 &avanti_mv,
817                 NULL,           /* Mustang */
818                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
819                 NULL,           /* Tradewind */
820                 NULL,           /* Mikasa -- see below.  */
821                 NULL,           /* EB64 */
822                 NULL,           /* EB66 -- see variation.  */
823                 NULL,           /* EB64+ -- see variation.  */
824                 &alphabook1_mv,
825                 &rawhide_mv,
826                 NULL,           /* K2 */
827                 &lynx_mv,       /* Lynx */
828                 &xl_mv,
829                 NULL,           /* EB164 -- see variation.  */
830                 NULL,           /* Noritake -- see below.  */
831                 NULL,           /* Cortex */
832                 NULL,           /* 29 */
833                 &miata_mv,
834                 NULL,           /* XXM */
835                 &takara_mv,
836                 NULL,           /* Yukon */
837                 NULL,           /* Tsunami -- see variation.  */
838                 &wildfire_mv,   /* Wildfire */
839                 NULL,           /* CUSCO */
840                 &eiger_mv,      /* Eiger */
841                 NULL,           /* Titan */
842                 NULL,           /* Marvel */
843         };
844
845         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
846         {
847                 NULL,           /* 100 */
848                 &ruffian_mv,
849         };
850
851         static struct alpha_machine_vector *api_vecs[] __initdata =
852         {
853                 NULL,           /* 200 */
854                 &nautilus_mv,
855         };
856
857         static struct alpha_machine_vector *alcor_vecs[] __initdata = 
858         {
859                 &alcor_mv, &xlt_mv, &xlt_mv
860         };
861
862         static struct alpha_machine_vector *eb164_vecs[] __initdata =
863         {
864                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
865         };
866
867         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
868         {
869                 &eb64p_mv,
870                 &cabriolet_mv,
871                 &cabriolet_mv           /* AlphaPCI64 */
872         };
873
874         static struct alpha_machine_vector *eb66_vecs[] __initdata =
875         {
876                 &eb66_mv,
877                 &eb66p_mv
878         };
879
880         static struct alpha_machine_vector *marvel_vecs[] __initdata =
881         {
882                 &marvel_ev7_mv,
883         };
884
885         static struct alpha_machine_vector *titan_vecs[] __initdata =
886         {
887                 &titan_mv,              /* default   */
888                 &privateer_mv,          /* privateer */
889                 &titan_mv,              /* falcon    */
890                 &privateer_mv,          /* granite   */
891         };
892
893         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
894         {
895                 NULL,
896                 &dp264_mv,              /* dp264 */
897                 &dp264_mv,              /* warhol */
898                 &dp264_mv,              /* windjammer */
899                 &monet_mv,              /* monet */
900                 &clipper_mv,            /* clipper */
901                 &dp264_mv,              /* goldrush */
902                 &webbrick_mv,           /* webbrick */
903                 &dp264_mv,              /* catamaran */
904                 NULL,                   /* brisbane? */
905                 NULL,                   /* melbourne? */
906                 NULL,                   /* flying clipper? */
907                 &shark_mv,              /* shark */
908         };
909
910         /* ??? Do we need to distinguish between Rawhides?  */
911
912         struct alpha_machine_vector *vec;
913
914         /* Search the system tables first... */
915         vec = NULL;
916         if (type < ARRAY_SIZE(systype_vecs)) {
917                 vec = systype_vecs[type];
918         } else if ((type > ST_API_BIAS) &&
919                    (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
920                 vec = api_vecs[type - ST_API_BIAS];
921         } else if ((type > ST_UNOFFICIAL_BIAS) &&
922                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
923                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
924         }
925
926         /* If we've not found one, try for a variation.  */
927
928         if (!vec) {
929                 /* Member ID is a bit-field. */
930                 unsigned long member = (variation >> 10) & 0x3f;
931
932                 cpu &= 0xffffffff; /* make it usable */
933
934                 switch (type) {
935                 case ST_DEC_ALCOR:
936                         if (member < ARRAY_SIZE(alcor_indices))
937                                 vec = alcor_vecs[alcor_indices[member]];
938                         break;
939                 case ST_DEC_EB164:
940                         if (member < ARRAY_SIZE(eb164_indices))
941                                 vec = eb164_vecs[eb164_indices[member]];
942                         /* PC164 may show as EB164 variation with EV56 CPU,
943                            but, since no true EB164 had anything but EV5... */
944                         if (vec == &eb164_mv && cpu == EV56_CPU)
945                                 vec = &pc164_mv;
946                         break;
947                 case ST_DEC_EB64P:
948                         if (member < ARRAY_SIZE(eb64p_indices))
949                                 vec = eb64p_vecs[eb64p_indices[member]];
950                         break;
951                 case ST_DEC_EB66:
952                         if (member < ARRAY_SIZE(eb66_indices))
953                                 vec = eb66_vecs[eb66_indices[member]];
954                         break;
955                 case ST_DEC_MARVEL:
956                         if (member < ARRAY_SIZE(marvel_indices))
957                                 vec = marvel_vecs[marvel_indices[member]];
958                         break;
959                 case ST_DEC_TITAN:
960                         vec = titan_vecs[0];    /* default */
961                         if (member < ARRAY_SIZE(titan_indices))
962                                 vec = titan_vecs[titan_indices[member]];
963                         break;
964                 case ST_DEC_TSUNAMI:
965                         if (member < ARRAY_SIZE(tsunami_indices))
966                                 vec = tsunami_vecs[tsunami_indices[member]];
967                         break;
968                 case ST_DEC_1000:
969                         if (cpu == EV5_CPU || cpu == EV56_CPU)
970                                 vec = &mikasa_primo_mv;
971                         else
972                                 vec = &mikasa_mv;
973                         break;
974                 case ST_DEC_NORITAKE:
975                         if (cpu == EV5_CPU || cpu == EV56_CPU)
976                                 vec = &noritake_primo_mv;
977                         else
978                                 vec = &noritake_mv;
979                         break;
980                 case ST_DEC_2100_A500:
981                         if (cpu == EV5_CPU || cpu == EV56_CPU)
982                                 vec = &sable_gamma_mv;
983                         else
984                                 vec = &sable_mv;
985                         break;
986                 }
987         }
988         return vec;
989 }
990
991 static struct alpha_machine_vector * __init
992 get_sysvec_byname(const char *name)
993 {
994         static struct alpha_machine_vector *all_vecs[] __initdata =
995         {
996                 &alcor_mv,
997                 &alphabook1_mv,
998                 &avanti_mv,
999                 &cabriolet_mv,
1000                 &clipper_mv,
1001                 &dp264_mv,
1002                 &eb164_mv,
1003                 &eb64p_mv,
1004                 &eb66_mv,
1005                 &eb66p_mv,
1006                 &eiger_mv,
1007                 &jensen_mv,
1008                 &lx164_mv,
1009                 &lynx_mv,
1010                 &miata_mv,
1011                 &mikasa_mv,
1012                 &mikasa_primo_mv,
1013                 &monet_mv,
1014                 &nautilus_mv,
1015                 &noname_mv,
1016                 &noritake_mv,
1017                 &noritake_primo_mv,
1018                 &p2k_mv,
1019                 &pc164_mv,
1020                 &privateer_mv,
1021                 &rawhide_mv,
1022                 &ruffian_mv,
1023                 &rx164_mv,
1024                 &sable_mv,
1025                 &sable_gamma_mv,
1026                 &shark_mv,
1027                 &sx164_mv,
1028                 &takara_mv,
1029                 &webbrick_mv,
1030                 &wildfire_mv,
1031                 &xl_mv,
1032                 &xlt_mv
1033         };
1034
1035         size_t i;
1036
1037         for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
1038                 struct alpha_machine_vector *mv = all_vecs[i];
1039                 if (strcasecmp(mv->vector_name, name) == 0)
1040                         return mv;
1041         }
1042         return NULL;
1043 }
1044
1045 static void
1046 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1047              char **type_name, char **variation_name)
1048 {
1049         unsigned long member;
1050
1051         /* If not in the tables, make it UNKNOWN,
1052            else set type name to family */
1053         if (type < ARRAY_SIZE(systype_names)) {
1054                 *type_name = systype_names[type];
1055         } else if ((type > ST_API_BIAS) &&
1056                    (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
1057                 *type_name = api_names[type - ST_API_BIAS];
1058         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1059                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1060                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1061         } else {
1062                 *type_name = sys_unknown;
1063                 *variation_name = sys_unknown;
1064                 return;
1065         }
1066
1067         /* Set variation to "0"; if variation is zero, done.  */
1068         *variation_name = systype_names[0];
1069         if (variation == 0) {
1070                 return;
1071         }
1072
1073         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1074
1075         cpu &= 0xffffffff; /* make it usable */
1076
1077         switch (type) { /* select by family */
1078         default: /* default to variation "0" for now */
1079                 break;
1080         case ST_DEC_EB164:
1081                 if (member < ARRAY_SIZE(eb164_indices))
1082                         *variation_name = eb164_names[eb164_indices[member]];
1083                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1084                    so, since no true EB164 had anything but EV5... */
1085                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1086                         *variation_name = eb164_names[1]; /* make it PC164 */
1087                 break;
1088         case ST_DEC_ALCOR:
1089                 if (member < ARRAY_SIZE(alcor_indices))
1090                         *variation_name = alcor_names[alcor_indices[member]];
1091                 break;
1092         case ST_DEC_EB64P:
1093                 if (member < ARRAY_SIZE(eb64p_indices))
1094                         *variation_name = eb64p_names[eb64p_indices[member]];
1095                 break;
1096         case ST_DEC_EB66:
1097                 if (member < ARRAY_SIZE(eb66_indices))
1098                         *variation_name = eb66_names[eb66_indices[member]];
1099                 break;
1100         case ST_DEC_MARVEL:
1101                 if (member < ARRAY_SIZE(marvel_indices))
1102                         *variation_name = marvel_names[marvel_indices[member]];
1103                 break;
1104         case ST_DEC_RAWHIDE:
1105                 if (member < ARRAY_SIZE(rawhide_indices))
1106                         *variation_name = rawhide_names[rawhide_indices[member]];
1107                 break;
1108         case ST_DEC_TITAN:
1109                 *variation_name = titan_names[0];       /* default */
1110                 if (member < ARRAY_SIZE(titan_indices))
1111                         *variation_name = titan_names[titan_indices[member]];
1112                 break;
1113         case ST_DEC_TSUNAMI:
1114                 if (member < ARRAY_SIZE(tsunami_indices))
1115                         *variation_name = tsunami_names[tsunami_indices[member]];
1116                 break;
1117         }
1118 }
1119
1120 /*
1121  * A change was made to the HWRPB via an ECO and the following code
1122  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1123  * was not implemented in the console firmware.  If it's revision 5 or
1124  * greater we can get the name of the platform as an ASCII string from
1125  * the HWRPB.  That's what this function does.  It checks the revision
1126  * level and if the string is in the HWRPB it returns the address of
1127  * the string--a pointer to the name of the platform.
1128  *
1129  * Returns:
1130  *      - Pointer to a ASCII string if it's in the HWRPB
1131  *      - Pointer to a blank string if the data is not in the HWRPB.
1132  */
1133
1134 static char *
1135 platform_string(void)
1136 {
1137         struct dsr_struct *dsr;
1138         static char unk_system_string[] = "N/A";
1139
1140         /* Go to the console for the string pointer.
1141          * If the rpb_vers is not 5 or greater the rpb
1142          * is old and does not have this data in it.
1143          */
1144         if (hwrpb->revision < 5)
1145                 return (unk_system_string);
1146         else {
1147                 /* The Dynamic System Recognition struct
1148                  * has the system platform name starting
1149                  * after the character count of the string.
1150                  */
1151                 dsr =  ((struct dsr_struct *)
1152                         ((char *)hwrpb + hwrpb->dsr_offset));
1153                 return ((char *)dsr + (dsr->sysname_off +
1154                                        sizeof(long)));
1155         }
1156 }
1157
1158 static int
1159 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1160 {
1161         struct percpu_struct *cpu;
1162         unsigned long i;
1163         int count = 0;
1164
1165         for (i = 0; i < num; i++) {
1166                 cpu = (struct percpu_struct *)
1167                         ((char *)cpubase + i*hwrpb->processor_size);
1168                 if ((cpu->flags & 0x1cc) == 0x1cc)
1169                         count++;
1170         }
1171         return count;
1172 }
1173
1174 static void
1175 show_cache_size (struct seq_file *f, const char *which, int shape)
1176 {
1177         if (shape == -1)
1178                 seq_printf (f, "%s\t\t: n/a\n", which);
1179         else if (shape == 0)
1180                 seq_printf (f, "%s\t\t: unknown\n", which);
1181         else
1182                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1183                             which, shape >> 10, shape & 15,
1184                             1 << ((shape >> 4) & 15));
1185 }
1186
1187 static int
1188 show_cpuinfo(struct seq_file *f, void *slot)
1189 {
1190         extern struct unaligned_stat {
1191                 unsigned long count, va, pc;
1192         } unaligned[2];
1193
1194         static char cpu_names[][8] = {
1195                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1196                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1197                 "EV68CX", "EV7", "EV79", "EV69"
1198         };
1199
1200         struct percpu_struct *cpu = slot;
1201         unsigned int cpu_index;
1202         char *cpu_name;
1203         char *systype_name;
1204         char *sysvariation_name;
1205         int nr_processors;
1206
1207         cpu_index = (unsigned) (cpu->type - 1);
1208         cpu_name = "Unknown";
1209         if (cpu_index < ARRAY_SIZE(cpu_names))
1210                 cpu_name = cpu_names[cpu_index];
1211
1212         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1213                      cpu->type, &systype_name, &sysvariation_name);
1214
1215         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1216
1217         seq_printf(f, "cpu\t\t\t: Alpha\n"
1218                       "cpu model\t\t: %s\n"
1219                       "cpu variation\t\t: %ld\n"
1220                       "cpu revision\t\t: %ld\n"
1221                       "cpu serial number\t: %s\n"
1222                       "system type\t\t: %s\n"
1223                       "system variation\t: %s\n"
1224                       "system revision\t\t: %ld\n"
1225                       "system serial number\t: %s\n"
1226                       "cycle frequency [Hz]\t: %lu %s\n"
1227                       "timer frequency [Hz]\t: %lu.%02lu\n"
1228                       "page size [bytes]\t: %ld\n"
1229                       "phys. address bits\t: %ld\n"
1230                       "max. addr. space #\t: %ld\n"
1231                       "BogoMIPS\t\t: %lu.%02lu\n"
1232                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1233                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1234                       "platform string\t\t: %s\n"
1235                       "cpus detected\t\t: %d\n",
1236                        cpu_name, cpu->variation, cpu->revision,
1237                        (char*)cpu->serial_no,
1238                        systype_name, sysvariation_name, hwrpb->sys_revision,
1239                        (char*)hwrpb->ssn,
1240                        est_cycle_freq ? : hwrpb->cycle_freq,
1241                        est_cycle_freq ? "est." : "",
1242                        hwrpb->intr_freq / 4096,
1243                        (100 * hwrpb->intr_freq / 4096) % 100,
1244                        hwrpb->pagesize,
1245                        hwrpb->pa_bits,
1246                        hwrpb->max_asn,
1247                        loops_per_jiffy / (500000/HZ),
1248                        (loops_per_jiffy / (5000/HZ)) % 100,
1249                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1250                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1251                        platform_string(), nr_processors);
1252
1253 #ifdef CONFIG_SMP
1254         seq_printf(f, "cpus active\t\t: %d\n"
1255                       "cpu active mask\t\t: %016lx\n",
1256                        num_online_cpus(), cpus_addr(cpu_possible_map)[0]);
1257 #endif
1258
1259         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1260         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1261         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1262         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1263
1264         return 0;
1265 }
1266
1267 static int __init
1268 read_mem_block(int *addr, int stride, int size)
1269 {
1270         long nloads = size / stride, cnt, tmp;
1271
1272         __asm__ __volatile__(
1273         "       rpcc    %0\n"
1274         "1:     ldl     %3,0(%2)\n"
1275         "       subq    %1,1,%1\n"
1276         /* Next two XORs introduce an explicit data dependency between
1277            consecutive loads in the loop, which will give us true load
1278            latency. */
1279         "       xor     %3,%2,%2\n"
1280         "       xor     %3,%2,%2\n"
1281         "       addq    %2,%4,%2\n"
1282         "       bne     %1,1b\n"
1283         "       rpcc    %3\n"
1284         "       subl    %3,%0,%0\n"
1285         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1286         : "r" (stride), "1" (nloads), "2" (addr));
1287
1288         return cnt / (size / stride);
1289 }
1290
1291 #define CSHAPE(totalsize, linesize, assoc) \
1292   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1293
1294 /* ??? EV5 supports up to 64M, but did the systems with more than
1295    16M of BCACHE ever exist? */
1296 #define MAX_BCACHE_SIZE 16*1024*1024
1297
1298 /* Note that the offchip caches are direct mapped on all Alphas. */
1299 static int __init
1300 external_cache_probe(int minsize, int width)
1301 {
1302         int cycles, prev_cycles = 1000000;
1303         int stride = 1 << width;
1304         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1305
1306         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1307                 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1308
1309         /* Get the first block cached. */
1310         read_mem_block(__va(0), stride, size);
1311
1312         while (size < maxsize) {
1313                 /* Get an average load latency in cycles. */
1314                 cycles = read_mem_block(__va(0), stride, size);
1315                 if (cycles > prev_cycles * 2) {
1316                         /* Fine, we exceed the cache. */
1317                         printk("%ldK Bcache detected; load hit latency %d "
1318                                "cycles, load miss latency %d cycles\n",
1319                                size >> 11, prev_cycles, cycles);
1320                         return CSHAPE(size >> 1, width, 1);
1321                 }
1322                 /* Try to get the next block cached. */
1323                 read_mem_block(__va(size), stride, size);
1324                 prev_cycles = cycles;
1325                 size <<= 1;
1326         }
1327         return -1;      /* No BCACHE found. */
1328 }
1329
1330 static void __init
1331 determine_cpu_caches (unsigned int cpu_type)
1332 {
1333         int L1I, L1D, L2, L3;
1334
1335         switch (cpu_type) {
1336         case EV4_CPU:
1337         case EV45_CPU:
1338           {
1339                 if (cpu_type == EV4_CPU)
1340                         L1I = CSHAPE(8*1024, 5, 1);
1341                 else
1342                         L1I = CSHAPE(16*1024, 5, 1);
1343                 L1D = L1I;
1344                 L3 = -1;
1345         
1346                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1347                    shadow copy, and may be available from some versions
1348                    of the CSERVE PALcall.  If we can get it, then
1349
1350                         unsigned long biu_ctl, size;
1351                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1352                         L2 = CSHAPE (size, 5, 1);
1353
1354                    Unfortunately, we can't rely on that.
1355                 */
1356                 L2 = external_cache_probe(128*1024, 5);
1357                 break;
1358           }
1359
1360         case LCA4_CPU:
1361           {
1362                 unsigned long car, size;
1363
1364                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1365                 L3 = -1;
1366
1367                 car = *(vuip) phys_to_virt (0x120000078UL);
1368                 size = 64*1024 * (1 << ((car >> 5) & 7));
1369                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1370                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1371                 break;
1372           }
1373
1374         case EV5_CPU:
1375         case EV56_CPU:
1376           {
1377                 unsigned long sc_ctl, width;
1378
1379                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1380
1381                 /* Check the line size of the Scache.  */
1382                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1383                 width = sc_ctl & 0x1000 ? 6 : 5;
1384                 L2 = CSHAPE (96*1024, width, 3);
1385
1386                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1387                    has a shadow copy, and may be available from some versions
1388                    of the CSERVE PALcall.  If we can get it, then
1389
1390                         unsigned long bc_control, bc_config, size;
1391                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1392                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1393
1394                    Unfortunately, we can't rely on that.
1395                 */
1396                 L3 = external_cache_probe(1024*1024, width);
1397                 break;
1398           }
1399
1400         case PCA56_CPU:
1401         case PCA57_CPU:
1402           {
1403                 unsigned long cbox_config, size;
1404
1405                 if (cpu_type == PCA56_CPU) {
1406                         L1I = CSHAPE(16*1024, 6, 1);
1407                         L1D = CSHAPE(8*1024, 5, 1);
1408                 } else {
1409                         L1I = CSHAPE(32*1024, 6, 2);
1410                         L1D = CSHAPE(16*1024, 5, 1);
1411                 }
1412                 L3 = -1;
1413
1414                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1415                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1416
1417 #if 0
1418                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1419 #else
1420                 L2 = external_cache_probe(512*1024, 6);
1421 #endif
1422                 break;
1423           }
1424
1425         case EV6_CPU:
1426         case EV67_CPU:
1427         case EV68CB_CPU:
1428         case EV68AL_CPU:
1429         case EV68CX_CPU:
1430         case EV69_CPU:
1431                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1432                 L2 = external_cache_probe(1024*1024, 6);
1433                 L3 = -1;
1434                 break;
1435
1436         case EV7_CPU:
1437         case EV79_CPU:
1438                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1439                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1440                 L3 = -1;
1441                 break;
1442
1443         default:
1444                 /* Nothing known about this cpu type.  */
1445                 L1I = L1D = L2 = L3 = 0;
1446                 break;
1447         }
1448
1449         alpha_l1i_cacheshape = L1I;
1450         alpha_l1d_cacheshape = L1D;
1451         alpha_l2_cacheshape = L2;
1452         alpha_l3_cacheshape = L3;
1453 }
1454
1455 /*
1456  * We show only CPU #0 info.
1457  */
1458 static void *
1459 c_start(struct seq_file *f, loff_t *pos)
1460 {
1461         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1462 }
1463
1464 static void *
1465 c_next(struct seq_file *f, void *v, loff_t *pos)
1466 {
1467         return NULL;
1468 }
1469
1470 static void
1471 c_stop(struct seq_file *f, void *v)
1472 {
1473 }
1474
1475 struct seq_operations cpuinfo_op = {
1476         .start  = c_start,
1477         .next   = c_next,
1478         .stop   = c_stop,
1479         .show   = show_cpuinfo,
1480 };
1481
1482
1483 static int
1484 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1485 {
1486 #if 1
1487         /* FIXME FIXME FIXME */
1488         /* If we are using SRM and serial console, just hard halt here. */
1489         if (alpha_using_srm && srmcons_output)
1490                 __halt();
1491 #endif
1492         return NOTIFY_DONE;
1493 }
1494
1495 static __init int add_pcspkr(void)
1496 {
1497         struct platform_device *pd;
1498         int ret;
1499
1500         pd = platform_device_alloc("pcspkr", -1);
1501         if (!pd)
1502                 return -ENOMEM;
1503
1504         ret = platform_device_add(pd);
1505         if (ret)
1506                 platform_device_put(pd);
1507
1508         return ret;
1509 }
1510 device_initcall(add_pcspkr);