2 * linux/arch/alpha/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
7 /* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
13 #include <linux/sched.h>
14 #include <linux/kernel.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/tty.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/errno.h>
28 #include <linux/init.h>
29 #include <linux/string.h>
30 #include <linux/ioport.h>
31 #include <linux/bootmem.h>
32 #include <linux/pci.h>
33 #include <linux/seq_file.h>
34 #include <linux/root_dev.h>
35 #include <linux/initrd.h>
36 #include <linux/eisa.h>
37 #include <linux/pfn.h>
38 #ifdef CONFIG_MAGIC_SYSRQ
39 #include <linux/sysrq.h>
40 #include <linux/reboot.h>
42 #include <linux/notifier.h>
43 #include <asm/setup.h>
46 extern struct atomic_notifier_head panic_notifier_list;
47 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
48 static struct notifier_block alpha_panic_block = {
51 INT_MAX /* try to do it first */
54 #include <asm/uaccess.h>
55 #include <asm/pgtable.h>
56 #include <asm/system.h>
57 #include <asm/hwrpb.h>
60 #include <asm/mmu_context.h>
61 #include <asm/console.h>
67 struct hwrpb_struct *hwrpb;
68 unsigned long srm_hae;
70 int alpha_l1i_cacheshape;
71 int alpha_l1d_cacheshape;
72 int alpha_l2_cacheshape;
73 int alpha_l3_cacheshape;
75 #ifdef CONFIG_VERBOSE_MCHECK
76 /* 0=minimum, 1=verbose, 2=all */
77 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
78 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
81 /* Which processor we booted from. */
85 * Using SRM callbacks for initial console output. This works from
86 * setup_arch() time through the end of time_init(), as those places
87 * are under our (Alpha) control.
89 * "srmcons" specified in the boot command arguments allows us to
90 * see kernel messages during the period of time before the true
91 * console device is "registered" during console_init().
92 * As of this version (2.5.59), console_init() will call
93 * disable_early_printk() as the last action before initializing
94 * the console drivers. That's the last possible time srmcons can be
95 * unregistered without interfering with console behavior.
97 * By default, OFF; set it with a bootcommand arg of "srmcons" or
98 * "console=srm". The meaning of these two args is:
99 * "srmcons" - early callback prints
100 * "console=srm" - full callback based console, including early prints
102 int srmcons_output = 0;
104 /* Enforce a memory size limit; useful for testing. By default, none. */
105 unsigned long mem_size_limit = 0;
107 /* Set AGP GART window size (0 means disabled). */
108 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
110 #ifdef CONFIG_ALPHA_GENERIC
111 struct alpha_machine_vector alpha_mv;
115 #define N(a) (sizeof(a)/sizeof(a[0]))
117 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
119 static struct alpha_machine_vector *get_sysvec_byname(const char *);
120 static void get_sysnames(unsigned long, unsigned long, unsigned long,
122 static void determine_cpu_caches (unsigned int);
124 static char command_line[COMMAND_LINE_SIZE];
127 * The format of "screen_info" is strange, and due to early
128 * i386-setup code. This is just enough to make the console
129 * code think we're on a VGA color display.
132 struct screen_info screen_info = {
135 .orig_video_cols = 80,
136 .orig_video_lines = 25,
137 .orig_video_isVGA = 1,
138 .orig_video_points = 16
142 * The direct map I/O window, if any. This should be the same
143 * for all busses, since it's used by virt_to_bus.
146 unsigned long __direct_map_base;
147 unsigned long __direct_map_size;
150 * Declare all of the machine vectors.
153 /* GCC 2.7.2 (on alpha at least) is lame. It does not support either
154 __attribute__((weak)) or #pragma weak. Bypass it and talk directly
158 extern struct alpha_machine_vector X; \
178 WEAK(mikasa_primo_mv);
183 WEAK(noritake_primo_mv);
191 WEAK(sable_gamma_mv);
204 * I/O resources inherited from PeeCees. Except for perhaps the
205 * turbochannel alphas, everyone has these on some sort of SuperIO chip.
207 * ??? If this becomes less standard, move the struct out into the
212 reserve_std_resources(void)
214 static struct resource standard_io_resources[] = {
215 { .name = "rtc", .start = -1, .end = -1 },
216 { .name = "dma1", .start = 0x00, .end = 0x1f },
217 { .name = "pic1", .start = 0x20, .end = 0x3f },
218 { .name = "timer", .start = 0x40, .end = 0x5f },
219 { .name = "keyboard", .start = 0x60, .end = 0x6f },
220 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
221 { .name = "pic2", .start = 0xa0, .end = 0xbf },
222 { .name = "dma2", .start = 0xc0, .end = 0xdf },
225 struct resource *io = &ioport_resource;
229 struct pci_controller *hose;
230 for (hose = hose_head; hose; hose = hose->next)
231 if (hose->index == 0) {
237 /* Fix up for the Jensen's queer RTC placement. */
238 standard_io_resources[0].start = RTC_PORT(0);
239 standard_io_resources[0].end = RTC_PORT(0) + 0x10;
241 for (i = 0; i < N(standard_io_resources); ++i)
242 request_resource(io, standard_io_resources+i);
245 #define PFN_MAX PFN_DOWN(0x80000000)
246 #define for_each_mem_cluster(memdesc, cluster, i) \
247 for ((cluster) = (memdesc)->cluster, (i) = 0; \
248 (i) < (memdesc)->numclusters; (i)++, (cluster)++)
250 static unsigned long __init
251 get_mem_size_limit(char *s)
253 unsigned long end = 0;
256 end = simple_strtoul(from, &from, 0);
257 if ( *from == 'K' || *from == 'k' ) {
260 } else if ( *from == 'M' || *from == 'm' ) {
263 } else if ( *from == 'G' || *from == 'g' ) {
267 return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
270 #ifdef CONFIG_BLK_DEV_INITRD
272 move_initrd(unsigned long mem_limit)
277 size = initrd_end - initrd_start;
278 start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
279 if (!start || __pa(start) + size > mem_limit) {
280 initrd_start = initrd_end = 0;
283 memmove(start, (void *)initrd_start, size);
284 initrd_start = (unsigned long)start;
285 initrd_end = initrd_start + size;
286 printk("initrd moved to %p\n", start);
291 #ifndef CONFIG_DISCONTIGMEM
293 setup_memory(void *kernel_end)
295 struct memclust_struct * cluster;
296 struct memdesc_struct * memdesc;
297 unsigned long start_kernel_pfn, end_kernel_pfn;
298 unsigned long bootmap_size, bootmap_pages, bootmap_start;
299 unsigned long start, end;
302 /* Find free clusters, and init and free the bootmem accordingly. */
303 memdesc = (struct memdesc_struct *)
304 (hwrpb->mddt_offset + (unsigned long) hwrpb);
306 for_each_mem_cluster(memdesc, cluster, i) {
307 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
308 i, cluster->usage, cluster->start_pfn,
309 cluster->start_pfn + cluster->numpages);
311 /* Bit 0 is console/PALcode reserved. Bit 1 is
312 non-volatile memory -- we might want to mark
314 if (cluster->usage & 3)
317 end = cluster->start_pfn + cluster->numpages;
318 if (end > max_low_pfn)
323 * Except for the NUMA systems (wildfire, marvel) all of the
324 * Alpha systems we run on support 32GB of memory or less.
325 * Since the NUMA systems introduce large holes in memory addressing,
326 * we can get into a situation where there is not enough contiguous
327 * memory for the memory map.
329 * Limit memory to the first 32GB to limit the NUMA systems to
330 * memory on their first node (wildfire) or 2 (marvel) to avoid
331 * not being able to produce the memory map. In order to access
332 * all of the memory on the NUMA systems, build with discontiguous
335 * If the user specified a memory limit, let that memory limit stand.
338 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
340 if (mem_size_limit && max_low_pfn >= mem_size_limit)
342 printk("setup: forcing memory size to %ldK (from %ldK).\n",
343 mem_size_limit << (PAGE_SHIFT - 10),
344 max_low_pfn << (PAGE_SHIFT - 10));
345 max_low_pfn = mem_size_limit;
348 /* Find the bounds of kernel memory. */
349 start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
350 end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
354 if (max_low_pfn <= end_kernel_pfn)
355 panic("not enough memory to boot");
357 /* We need to know how many physically contiguous pages
358 we'll need for the bootmap. */
359 bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
361 /* Now find a good region where to allocate the bootmap. */
362 for_each_mem_cluster(memdesc, cluster, i) {
363 if (cluster->usage & 3)
366 start = cluster->start_pfn;
367 end = start + cluster->numpages;
368 if (start >= max_low_pfn)
370 if (end > max_low_pfn)
372 if (start < start_kernel_pfn) {
373 if (end > end_kernel_pfn
374 && end - end_kernel_pfn >= bootmap_pages) {
375 bootmap_start = end_kernel_pfn;
377 } else if (end > start_kernel_pfn)
378 end = start_kernel_pfn;
379 } else if (start < end_kernel_pfn)
380 start = end_kernel_pfn;
381 if (end - start >= bootmap_pages) {
382 bootmap_start = start;
387 if (bootmap_start == ~0UL) {
392 /* Allocate the bootmap and mark the whole MM as reserved. */
393 bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
395 /* Mark the free regions. */
396 for_each_mem_cluster(memdesc, cluster, i) {
397 if (cluster->usage & 3)
400 start = cluster->start_pfn;
401 end = cluster->start_pfn + cluster->numpages;
402 if (start >= max_low_pfn)
404 if (end > max_low_pfn)
406 if (start < start_kernel_pfn) {
407 if (end > end_kernel_pfn) {
408 free_bootmem(PFN_PHYS(start),
409 (PFN_PHYS(start_kernel_pfn)
411 printk("freeing pages %ld:%ld\n",
412 start, start_kernel_pfn);
413 start = end_kernel_pfn;
414 } else if (end > start_kernel_pfn)
415 end = start_kernel_pfn;
416 } else if (start < end_kernel_pfn)
417 start = end_kernel_pfn;
421 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
422 printk("freeing pages %ld:%ld\n", start, end);
425 /* Reserve the bootmap memory. */
426 reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size);
427 printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
429 #ifdef CONFIG_BLK_DEV_INITRD
430 initrd_start = INITRD_START;
432 initrd_end = initrd_start+INITRD_SIZE;
433 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
434 (void *) initrd_start, INITRD_SIZE);
436 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
437 if (!move_initrd(PFN_PHYS(max_low_pfn)))
438 printk("initrd extends beyond end of memory "
439 "(0x%08lx > 0x%p)\ndisabling initrd\n",
441 phys_to_virt(PFN_PHYS(max_low_pfn)));
443 reserve_bootmem(virt_to_phys((void *)initrd_start),
447 #endif /* CONFIG_BLK_DEV_INITRD */
450 extern void setup_memory(void *);
451 #endif /* !CONFIG_DISCONTIGMEM */
454 page_is_ram(unsigned long pfn)
456 struct memclust_struct * cluster;
457 struct memdesc_struct * memdesc;
460 memdesc = (struct memdesc_struct *)
461 (hwrpb->mddt_offset + (unsigned long) hwrpb);
462 for_each_mem_cluster(memdesc, cluster, i)
464 if (pfn >= cluster->start_pfn &&
465 pfn < cluster->start_pfn + cluster->numpages) {
466 return (cluster->usage & 3) ? 0 : 1;
474 setup_arch(char **cmdline_p)
478 struct alpha_machine_vector *vec = NULL;
479 struct percpu_struct *cpu;
480 char *type_name, *var_name, *p;
481 void *kernel_end = _end; /* end of kernel */
482 char *args = command_line;
484 hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
485 boot_cpuid = hard_smp_processor_id();
488 * Pre-process the system type to make sure it will be valid.
490 * This may restore real CABRIO and EB66+ family names, ie
493 * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
494 * and AS1200 (DIGITAL Server 5000 series) have the type as
495 * the negative of the real one.
497 if ((long)hwrpb->sys_type < 0) {
498 hwrpb->sys_type = -((long)hwrpb->sys_type);
499 hwrpb_update_checksum(hwrpb);
502 /* Register a call for panic conditions. */
503 atomic_notifier_chain_register(&panic_notifier_list,
506 #ifdef CONFIG_ALPHA_GENERIC
507 /* Assume that we've booted from SRM if we haven't booted from MILO.
508 Detect the later by looking for "MILO" in the system serial nr. */
509 alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
512 /* If we are using SRM, we want to allow callbacks
513 as early as possible, so do this NOW, and then
514 they should work immediately thereafter.
516 kernel_end = callback_init(kernel_end);
519 * Locate the command line.
521 /* Hack for Jensen... since we're restricted to 8 or 16 chars for
522 boot flags depending on the boot mode, we need some shorthand.
523 This should do for installation. */
524 if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
525 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
527 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
529 strcpy(saved_command_line, command_line);
530 *cmdline_p = command_line;
533 * Process command-line arguments.
535 while ((p = strsep(&args, " \t")) != NULL) {
537 if (strncmp(p, "alpha_mv=", 9) == 0) {
538 vec = get_sysvec_byname(p+9);
541 if (strncmp(p, "cycle=", 6) == 0) {
542 est_cycle_freq = simple_strtol(p+6, NULL, 0);
545 if (strncmp(p, "mem=", 4) == 0) {
546 mem_size_limit = get_mem_size_limit(p+4);
549 if (strncmp(p, "srmcons", 7) == 0) {
553 if (strncmp(p, "console=srm", 11) == 0) {
557 if (strncmp(p, "gartsize=", 9) == 0) {
559 get_mem_size_limit(p+9) << PAGE_SHIFT;
562 #ifdef CONFIG_VERBOSE_MCHECK
563 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
564 alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
570 /* Replace the command line, now that we've killed it with strsep. */
571 strcpy(command_line, saved_command_line);
573 /* If we want SRM console printk echoing early, do it now. */
574 if (alpha_using_srm && srmcons_output) {
575 register_srm_console();
578 * If "console=srm" was specified, clear the srmcons_output
579 * flag now so that time.c won't unregister_srm_console
581 if (srmcons_output & 2)
585 #ifdef CONFIG_MAGIC_SYSRQ
586 /* If we're using SRM, make sysrq-b halt back to the prom,
588 if (alpha_using_srm) {
589 struct sysrq_key_op *op = __sysrq_get_key_op('b');
590 op->handler = (void *) machine_halt;
595 * Identify and reconfigure for the current system.
597 cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
599 get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
600 cpu->type, &type_name, &var_name);
601 if (*var_name == '0')
605 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
610 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
611 type_name, (*var_name ? " variation " : ""), var_name,
612 hwrpb->sys_type, hwrpb->sys_variation);
614 if (vec != &alpha_mv) {
619 #ifdef CONFIG_ALPHA_GENERIC
622 "on %s%s%s using machine vector %s from %s\n",
623 type_name, (*var_name ? " variation " : ""),
624 var_name, alpha_mv.vector_name,
625 (alpha_using_srm ? "SRM" : "MILO"));
627 printk("Major Options: "
631 #ifdef CONFIG_ALPHA_EV56
634 #ifdef CONFIG_ALPHA_EV67
637 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
640 #ifdef CONFIG_VERBOSE_MCHECK
644 #ifdef CONFIG_DISCONTIGMEM
651 #ifdef CONFIG_DEBUG_SPINLOCK
654 #ifdef CONFIG_MAGIC_SYSRQ
659 printk("Command line: %s\n", command_line);
663 * Save the SRM's current value for restoration.
665 srm_hae = *alpha_mv.hae_register;
666 __set_hae(alpha_mv.hae_cache);
668 /* Reset enable correctable error reports. */
671 /* Find our memory. */
672 setup_memory(kernel_end);
674 /* First guess at cpu cache sizes. Do this before init_arch. */
675 determine_cpu_caches(cpu->type);
677 /* Initialize the machine. Usually has to do with setting up
678 DMA windows and the like. */
679 if (alpha_mv.init_arch)
680 alpha_mv.init_arch();
682 /* Reserve standard resources. */
683 reserve_std_resources();
686 * Give us a default console. TGA users will see nothing until
687 * chr_dev_init is called, rather late in the boot sequence.
691 #if defined(CONFIG_VGA_CONSOLE)
692 conswitchp = &vga_con;
693 #elif defined(CONFIG_DUMMY_CONSOLE)
694 conswitchp = &dummy_con;
698 /* Default root filesystem to sda2. */
699 ROOT_DEV = Root_SDA2;
702 /* FIXME: only set this when we actually have EISA in this box? */
707 * Check ASN in HWRPB for validity, report if bad.
708 * FIXME: how was this failing? Should we trust it instead,
709 * and copy the value into alpha_mv.max_asn?
712 if (hwrpb->max_asn != MAX_ASN) {
713 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
717 * Identify the flock of penguins.
727 disable_early_printk(void)
729 if (alpha_using_srm && srmcons_output) {
730 unregister_srm_console();
735 static char sys_unknown[] = "Unknown";
736 static char systype_names[][16] = {
738 "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
739 "Pelican", "Morgan", "Sable", "Medulla", "Noname",
740 "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
741 "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
742 "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
743 "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
744 "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
747 static char unofficial_names[][8] = {"100", "Ruffian"};
749 static char api_names[][16] = {"200", "Nautilus"};
751 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
752 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
754 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
755 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
757 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
758 static int eb64p_indices[] = {0,0,1,2};
760 static char eb66_names[][8] = {"EB66", "EB66+"};
761 static int eb66_indices[] = {0,0,1};
763 static char marvel_names[][16] = {
766 static int marvel_indices[] = { 0 };
768 static char rawhide_names[][16] = {
769 "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
771 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
773 static char titan_names[][16] = {
774 "DEFAULT", "Privateer", "Falcon", "Granite"
776 static int titan_indices[] = {0,1,2,2,3};
778 static char tsunami_names[][16] = {
779 "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
780 "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
781 "Flying Clipper", "Shark"
783 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
785 static struct alpha_machine_vector * __init
786 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
788 static struct alpha_machine_vector *systype_vecs[] __initdata =
795 NULL, /* Mannequin */
799 NULL, /* Sable -- see below. */
802 NULL, /* Turbolaser */
805 NULL, /* Alcor, Bret, Maverick. HWRPB inaccurate? */
806 NULL, /* Tradewind */
807 NULL, /* Mikasa -- see below. */
809 NULL, /* EB66 -- see variation. */
810 NULL, /* EB64+ -- see variation. */
816 NULL, /* EB164 -- see variation. */
817 NULL, /* Noritake -- see below. */
824 NULL, /* Tsunami -- see variation. */
825 &wildfire_mv, /* Wildfire */
827 &eiger_mv, /* Eiger */
832 static struct alpha_machine_vector *unofficial_vecs[] __initdata =
838 static struct alpha_machine_vector *api_vecs[] __initdata =
844 static struct alpha_machine_vector *alcor_vecs[] __initdata =
846 &alcor_mv, &xlt_mv, &xlt_mv
849 static struct alpha_machine_vector *eb164_vecs[] __initdata =
851 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
854 static struct alpha_machine_vector *eb64p_vecs[] __initdata =
858 &cabriolet_mv /* AlphaPCI64 */
861 static struct alpha_machine_vector *eb66_vecs[] __initdata =
867 static struct alpha_machine_vector *marvel_vecs[] __initdata =
872 static struct alpha_machine_vector *titan_vecs[] __initdata =
874 &titan_mv, /* default */
875 &privateer_mv, /* privateer */
876 &titan_mv, /* falcon */
877 &privateer_mv, /* granite */
880 static struct alpha_machine_vector *tsunami_vecs[] __initdata =
883 &dp264_mv, /* dp264 */
884 &dp264_mv, /* warhol */
885 &dp264_mv, /* windjammer */
886 &monet_mv, /* monet */
887 &clipper_mv, /* clipper */
888 &dp264_mv, /* goldrush */
889 &webbrick_mv, /* webbrick */
890 &dp264_mv, /* catamaran */
891 NULL, /* brisbane? */
892 NULL, /* melbourne? */
893 NULL, /* flying clipper? */
894 &shark_mv, /* shark */
897 /* ??? Do we need to distinguish between Rawhides? */
899 struct alpha_machine_vector *vec;
901 /* Search the system tables first... */
903 if (type < N(systype_vecs)) {
904 vec = systype_vecs[type];
905 } else if ((type > ST_API_BIAS) &&
906 (type - ST_API_BIAS) < N(api_vecs)) {
907 vec = api_vecs[type - ST_API_BIAS];
908 } else if ((type > ST_UNOFFICIAL_BIAS) &&
909 (type - ST_UNOFFICIAL_BIAS) < N(unofficial_vecs)) {
910 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
913 /* If we've not found one, try for a variation. */
916 /* Member ID is a bit-field. */
917 unsigned long member = (variation >> 10) & 0x3f;
919 cpu &= 0xffffffff; /* make it usable */
923 if (member < N(alcor_indices))
924 vec = alcor_vecs[alcor_indices[member]];
927 if (member < N(eb164_indices))
928 vec = eb164_vecs[eb164_indices[member]];
929 /* PC164 may show as EB164 variation with EV56 CPU,
930 but, since no true EB164 had anything but EV5... */
931 if (vec == &eb164_mv && cpu == EV56_CPU)
935 if (member < N(eb64p_indices))
936 vec = eb64p_vecs[eb64p_indices[member]];
939 if (member < N(eb66_indices))
940 vec = eb66_vecs[eb66_indices[member]];
943 if (member < N(marvel_indices))
944 vec = marvel_vecs[marvel_indices[member]];
947 vec = titan_vecs[0]; /* default */
948 if (member < N(titan_indices))
949 vec = titan_vecs[titan_indices[member]];
952 if (member < N(tsunami_indices))
953 vec = tsunami_vecs[tsunami_indices[member]];
956 if (cpu == EV5_CPU || cpu == EV56_CPU)
957 vec = &mikasa_primo_mv;
961 case ST_DEC_NORITAKE:
962 if (cpu == EV5_CPU || cpu == EV56_CPU)
963 vec = &noritake_primo_mv;
967 case ST_DEC_2100_A500:
968 if (cpu == EV5_CPU || cpu == EV56_CPU)
969 vec = &sable_gamma_mv;
978 static struct alpha_machine_vector * __init
979 get_sysvec_byname(const char *name)
981 static struct alpha_machine_vector *all_vecs[] __initdata =
1024 for (i = 0; i < N(all_vecs); ++i) {
1025 struct alpha_machine_vector *mv = all_vecs[i];
1026 if (strcasecmp(mv->vector_name, name) == 0)
1033 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1034 char **type_name, char **variation_name)
1036 unsigned long member;
1038 /* If not in the tables, make it UNKNOWN,
1039 else set type name to family */
1040 if (type < N(systype_names)) {
1041 *type_name = systype_names[type];
1042 } else if ((type > ST_API_BIAS) &&
1043 (type - ST_API_BIAS) < N(api_names)) {
1044 *type_name = api_names[type - ST_API_BIAS];
1045 } else if ((type > ST_UNOFFICIAL_BIAS) &&
1046 (type - ST_UNOFFICIAL_BIAS) < N(unofficial_names)) {
1047 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1049 *type_name = sys_unknown;
1050 *variation_name = sys_unknown;
1054 /* Set variation to "0"; if variation is zero, done. */
1055 *variation_name = systype_names[0];
1056 if (variation == 0) {
1060 member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1062 cpu &= 0xffffffff; /* make it usable */
1064 switch (type) { /* select by family */
1065 default: /* default to variation "0" for now */
1068 if (member < N(eb164_indices))
1069 *variation_name = eb164_names[eb164_indices[member]];
1070 /* PC164 may show as EB164 variation, but with EV56 CPU,
1071 so, since no true EB164 had anything but EV5... */
1072 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1073 *variation_name = eb164_names[1]; /* make it PC164 */
1076 if (member < N(alcor_indices))
1077 *variation_name = alcor_names[alcor_indices[member]];
1080 if (member < N(eb64p_indices))
1081 *variation_name = eb64p_names[eb64p_indices[member]];
1084 if (member < N(eb66_indices))
1085 *variation_name = eb66_names[eb66_indices[member]];
1088 if (member < N(marvel_indices))
1089 *variation_name = marvel_names[marvel_indices[member]];
1091 case ST_DEC_RAWHIDE:
1092 if (member < N(rawhide_indices))
1093 *variation_name = rawhide_names[rawhide_indices[member]];
1096 *variation_name = titan_names[0]; /* default */
1097 if (member < N(titan_indices))
1098 *variation_name = titan_names[titan_indices[member]];
1100 case ST_DEC_TSUNAMI:
1101 if (member < N(tsunami_indices))
1102 *variation_name = tsunami_names[tsunami_indices[member]];
1108 * A change was made to the HWRPB via an ECO and the following code
1109 * tracks a part of the ECO. In HWRPB versions less than 5, the ECO
1110 * was not implemented in the console firmware. If it's revision 5 or
1111 * greater we can get the name of the platform as an ASCII string from
1112 * the HWRPB. That's what this function does. It checks the revision
1113 * level and if the string is in the HWRPB it returns the address of
1114 * the string--a pointer to the name of the platform.
1117 * - Pointer to a ASCII string if it's in the HWRPB
1118 * - Pointer to a blank string if the data is not in the HWRPB.
1122 platform_string(void)
1124 struct dsr_struct *dsr;
1125 static char unk_system_string[] = "N/A";
1127 /* Go to the console for the string pointer.
1128 * If the rpb_vers is not 5 or greater the rpb
1129 * is old and does not have this data in it.
1131 if (hwrpb->revision < 5)
1132 return (unk_system_string);
1134 /* The Dynamic System Recognition struct
1135 * has the system platform name starting
1136 * after the character count of the string.
1138 dsr = ((struct dsr_struct *)
1139 ((char *)hwrpb + hwrpb->dsr_offset));
1140 return ((char *)dsr + (dsr->sysname_off +
1146 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1148 struct percpu_struct *cpu;
1152 for (i = 0; i < num; i++) {
1153 cpu = (struct percpu_struct *)
1154 ((char *)cpubase + i*hwrpb->processor_size);
1155 if ((cpu->flags & 0x1cc) == 0x1cc)
1162 show_cache_size (struct seq_file *f, const char *which, int shape)
1165 seq_printf (f, "%s\t\t: n/a\n", which);
1166 else if (shape == 0)
1167 seq_printf (f, "%s\t\t: unknown\n", which);
1169 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1170 which, shape >> 10, shape & 15,
1171 1 << ((shape >> 4) & 15));
1175 show_cpuinfo(struct seq_file *f, void *slot)
1177 extern struct unaligned_stat {
1178 unsigned long count, va, pc;
1181 static char cpu_names[][8] = {
1182 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1183 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1184 "EV68CX", "EV7", "EV79", "EV69"
1187 struct percpu_struct *cpu = slot;
1188 unsigned int cpu_index;
1191 char *sysvariation_name;
1194 cpu_index = (unsigned) (cpu->type - 1);
1195 cpu_name = "Unknown";
1196 if (cpu_index < N(cpu_names))
1197 cpu_name = cpu_names[cpu_index];
1199 get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1200 cpu->type, &systype_name, &sysvariation_name);
1202 nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1204 seq_printf(f, "cpu\t\t\t: Alpha\n"
1205 "cpu model\t\t: %s\n"
1206 "cpu variation\t\t: %ld\n"
1207 "cpu revision\t\t: %ld\n"
1208 "cpu serial number\t: %s\n"
1209 "system type\t\t: %s\n"
1210 "system variation\t: %s\n"
1211 "system revision\t\t: %ld\n"
1212 "system serial number\t: %s\n"
1213 "cycle frequency [Hz]\t: %lu %s\n"
1214 "timer frequency [Hz]\t: %lu.%02lu\n"
1215 "page size [bytes]\t: %ld\n"
1216 "phys. address bits\t: %ld\n"
1217 "max. addr. space #\t: %ld\n"
1218 "BogoMIPS\t\t: %lu.%02lu\n"
1219 "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1220 "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1221 "platform string\t\t: %s\n"
1222 "cpus detected\t\t: %d\n",
1223 cpu_name, cpu->variation, cpu->revision,
1224 (char*)cpu->serial_no,
1225 systype_name, sysvariation_name, hwrpb->sys_revision,
1227 est_cycle_freq ? : hwrpb->cycle_freq,
1228 est_cycle_freq ? "est." : "",
1229 hwrpb->intr_freq / 4096,
1230 (100 * hwrpb->intr_freq / 4096) % 100,
1234 loops_per_jiffy / (500000/HZ),
1235 (loops_per_jiffy / (5000/HZ)) % 100,
1236 unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1237 unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1238 platform_string(), nr_processors);
1241 seq_printf(f, "cpus active\t\t: %d\n"
1242 "cpu active mask\t\t: %016lx\n",
1243 num_online_cpus(), cpus_addr(cpu_possible_map)[0]);
1246 show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1247 show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1248 show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1249 show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1255 read_mem_block(int *addr, int stride, int size)
1257 long nloads = size / stride, cnt, tmp;
1259 __asm__ __volatile__(
1263 /* Next two XORs introduce an explicit data dependency between
1264 consecutive loads in the loop, which will give us true load
1272 : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1273 : "r" (stride), "1" (nloads), "2" (addr));
1275 return cnt / (size / stride);
1278 #define CSHAPE(totalsize, linesize, assoc) \
1279 ((totalsize & ~0xff) | (linesize << 4) | assoc)
1281 /* ??? EV5 supports up to 64M, but did the systems with more than
1282 16M of BCACHE ever exist? */
1283 #define MAX_BCACHE_SIZE 16*1024*1024
1285 /* Note that the offchip caches are direct mapped on all Alphas. */
1287 external_cache_probe(int minsize, int width)
1289 int cycles, prev_cycles = 1000000;
1290 int stride = 1 << width;
1291 long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1293 if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1294 maxsize = 1 << (floor_log2(max_low_pfn + 1) + PAGE_SHIFT);
1296 /* Get the first block cached. */
1297 read_mem_block(__va(0), stride, size);
1299 while (size < maxsize) {
1300 /* Get an average load latency in cycles. */
1301 cycles = read_mem_block(__va(0), stride, size);
1302 if (cycles > prev_cycles * 2) {
1303 /* Fine, we exceed the cache. */
1304 printk("%ldK Bcache detected; load hit latency %d "
1305 "cycles, load miss latency %d cycles\n",
1306 size >> 11, prev_cycles, cycles);
1307 return CSHAPE(size >> 1, width, 1);
1309 /* Try to get the next block cached. */
1310 read_mem_block(__va(size), stride, size);
1311 prev_cycles = cycles;
1314 return -1; /* No BCACHE found. */
1318 determine_cpu_caches (unsigned int cpu_type)
1320 int L1I, L1D, L2, L3;
1326 if (cpu_type == EV4_CPU)
1327 L1I = CSHAPE(8*1024, 5, 1);
1329 L1I = CSHAPE(16*1024, 5, 1);
1333 /* BIU_CTL is a write-only Abox register. PALcode has a
1334 shadow copy, and may be available from some versions
1335 of the CSERVE PALcall. If we can get it, then
1337 unsigned long biu_ctl, size;
1338 size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1339 L2 = CSHAPE (size, 5, 1);
1341 Unfortunately, we can't rely on that.
1343 L2 = external_cache_probe(128*1024, 5);
1349 unsigned long car, size;
1351 L1I = L1D = CSHAPE(8*1024, 5, 1);
1354 car = *(vuip) phys_to_virt (0x120000078UL);
1355 size = 64*1024 * (1 << ((car >> 5) & 7));
1356 /* No typo -- 8 byte cacheline size. Whodathunk. */
1357 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1364 unsigned long sc_ctl, width;
1366 L1I = L1D = CSHAPE(8*1024, 5, 1);
1368 /* Check the line size of the Scache. */
1369 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1370 width = sc_ctl & 0x1000 ? 6 : 5;
1371 L2 = CSHAPE (96*1024, width, 3);
1373 /* BC_CONTROL and BC_CONFIG are write-only IPRs. PALcode
1374 has a shadow copy, and may be available from some versions
1375 of the CSERVE PALcall. If we can get it, then
1377 unsigned long bc_control, bc_config, size;
1378 size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1379 L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1381 Unfortunately, we can't rely on that.
1383 L3 = external_cache_probe(1024*1024, width);
1390 unsigned long cbox_config, size;
1392 if (cpu_type == PCA56_CPU) {
1393 L1I = CSHAPE(16*1024, 6, 1);
1394 L1D = CSHAPE(8*1024, 5, 1);
1396 L1I = CSHAPE(32*1024, 6, 2);
1397 L1D = CSHAPE(16*1024, 5, 1);
1401 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1402 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1405 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1407 L2 = external_cache_probe(512*1024, 6);
1418 L1I = L1D = CSHAPE(64*1024, 6, 2);
1419 L2 = external_cache_probe(1024*1024, 6);
1425 L1I = L1D = CSHAPE(64*1024, 6, 2);
1426 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1431 /* Nothing known about this cpu type. */
1432 L1I = L1D = L2 = L3 = 0;
1436 alpha_l1i_cacheshape = L1I;
1437 alpha_l1d_cacheshape = L1D;
1438 alpha_l2_cacheshape = L2;
1439 alpha_l3_cacheshape = L3;
1443 * We show only CPU #0 info.
1446 c_start(struct seq_file *f, loff_t *pos)
1448 return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1452 c_next(struct seq_file *f, void *v, loff_t *pos)
1458 c_stop(struct seq_file *f, void *v)
1462 struct seq_operations cpuinfo_op = {
1466 .show = show_cpuinfo,
1471 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1474 /* FIXME FIXME FIXME */
1475 /* If we are using SRM and serial console, just hard halt here. */
1476 if (alpha_using_srm && srmcons_output)