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1 /*
2  * Architecture-specific setup.
3  *
4  * Copyright (C) 1998-2001, 2003-2004 Hewlett-Packard Co
5  *      David Mosberger-Tang <davidm@hpl.hp.com>
6  *      Stephane Eranian <eranian@hpl.hp.com>
7  * Copyright (C) 2000, 2004 Intel Corp
8  *      Rohit Seth <rohit.seth@intel.com>
9  *      Suresh Siddha <suresh.b.siddha@intel.com>
10  *      Gordon Jin <gordon.jin@intel.com>
11  * Copyright (C) 1999 VA Linux Systems
12  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
13  *
14  * 12/26/04 S.Siddha, G.Jin, R.Seth
15  *                      Add multi-threading and multi-core detection
16  * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo().
17  * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map
18  * 03/31/00 R.Seth      cpu_initialized and current->processor fixes
19  * 02/04/00 D.Mosberger some more get_cpuinfo fixes...
20  * 02/01/00 R.Seth      fixed get_cpuinfo for SMP
21  * 01/07/99 S.Eranian   added the support for command line argument
22  * 06/24/99 W.Drummond  added boot_cpu_data.
23  * 05/28/05 Z. Menyhart Dynamic stride size for "flush_icache_range()"
24  */
25 #include <linux/module.h>
26 #include <linux/init.h>
27
28 #include <linux/acpi.h>
29 #include <linux/bootmem.h>
30 #include <linux/console.h>
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <linux/reboot.h>
34 #include <linux/sched.h>
35 #include <linux/seq_file.h>
36 #include <linux/string.h>
37 #include <linux/threads.h>
38 #include <linux/screen_info.h>
39 #include <linux/dmi.h>
40 #include <linux/serial.h>
41 #include <linux/serial_core.h>
42 #include <linux/efi.h>
43 #include <linux/initrd.h>
44 #include <linux/pm.h>
45 #include <linux/cpufreq.h>
46 #include <linux/kexec.h>
47 #include <linux/crash_dump.h>
48
49 #include <asm/ia32.h>
50 #include <asm/machvec.h>
51 #include <asm/mca.h>
52 #include <asm/meminit.h>
53 #include <asm/page.h>
54 #include <asm/patch.h>
55 #include <asm/pgtable.h>
56 #include <asm/processor.h>
57 #include <asm/sal.h>
58 #include <asm/sections.h>
59 #include <asm/setup.h>
60 #include <asm/smp.h>
61 #include <asm/system.h>
62 #include <asm/unistd.h>
63 #include <asm/hpsim.h>
64
65 #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
66 # error "struct cpuinfo_ia64 too big!"
67 #endif
68
69 #ifdef CONFIG_SMP
70 unsigned long __per_cpu_offset[NR_CPUS];
71 EXPORT_SYMBOL(__per_cpu_offset);
72 #endif
73
74 extern void ia64_setup_printk_clock(void);
75
76 DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info);
77 DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
78 unsigned long ia64_cycles_per_usec;
79 struct ia64_boot_param *ia64_boot_param;
80 struct screen_info screen_info;
81 unsigned long vga_console_iobase;
82 unsigned long vga_console_membase;
83
84 static struct resource data_resource = {
85         .name   = "Kernel data",
86         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
87 };
88
89 static struct resource code_resource = {
90         .name   = "Kernel code",
91         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
92 };
93 extern char _text[], _end[], _etext[];
94
95 unsigned long ia64_max_cacheline_size;
96
97 int dma_get_cache_alignment(void)
98 {
99         return ia64_max_cacheline_size;
100 }
101 EXPORT_SYMBOL(dma_get_cache_alignment);
102
103 unsigned long ia64_iobase;      /* virtual address for I/O accesses */
104 EXPORT_SYMBOL(ia64_iobase);
105 struct io_space io_space[MAX_IO_SPACES];
106 EXPORT_SYMBOL(io_space);
107 unsigned int num_io_spaces;
108
109 /*
110  * "flush_icache_range()" needs to know what processor dependent stride size to use
111  * when it makes i-cache(s) coherent with d-caches.
112  */
113 #define I_CACHE_STRIDE_SHIFT    5       /* Safest way to go: 32 bytes by 32 bytes */
114 unsigned long ia64_i_cache_stride_shift = ~0;
115
116 /*
117  * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1).  This
118  * mask specifies a mask of address bits that must be 0 in order for two buffers to be
119  * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
120  * address of the second buffer must be aligned to (merge_mask+1) in order to be
121  * mergeable).  By default, we assume there is no I/O MMU which can merge physically
122  * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
123  * page-size of 2^64.
124  */
125 unsigned long ia64_max_iommu_merge_mask = ~0UL;
126 EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
127
128 /*
129  * We use a special marker for the end of memory and it uses the extra (+1) slot
130  */
131 struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
132 int num_rsvd_regions __initdata;
133
134
135 /*
136  * Filter incoming memory segments based on the primitive map created from the boot
137  * parameters. Segments contained in the map are removed from the memory ranges. A
138  * caller-specified function is called with the memory ranges that remain after filtering.
139  * This routine does not assume the incoming segments are sorted.
140  */
141 int __init
142 filter_rsvd_memory (unsigned long start, unsigned long end, void *arg)
143 {
144         unsigned long range_start, range_end, prev_start;
145         void (*func)(unsigned long, unsigned long, int);
146         int i;
147
148 #if IGNORE_PFN0
149         if (start == PAGE_OFFSET) {
150                 printk(KERN_WARNING "warning: skipping physical page 0\n");
151                 start += PAGE_SIZE;
152                 if (start >= end) return 0;
153         }
154 #endif
155         /*
156          * lowest possible address(walker uses virtual)
157          */
158         prev_start = PAGE_OFFSET;
159         func = arg;
160
161         for (i = 0; i < num_rsvd_regions; ++i) {
162                 range_start = max(start, prev_start);
163                 range_end   = min(end, rsvd_region[i].start);
164
165                 if (range_start < range_end)
166                         call_pernode_memory(__pa(range_start), range_end - range_start, func);
167
168                 /* nothing more available in this segment */
169                 if (range_end == end) return 0;
170
171                 prev_start = rsvd_region[i].end;
172         }
173         /* end of memory marker allows full processing inside loop body */
174         return 0;
175 }
176
177 static void __init
178 sort_regions (struct rsvd_region *rsvd_region, int max)
179 {
180         int j;
181
182         /* simple bubble sorting */
183         while (max--) {
184                 for (j = 0; j < max; ++j) {
185                         if (rsvd_region[j].start > rsvd_region[j+1].start) {
186                                 struct rsvd_region tmp;
187                                 tmp = rsvd_region[j];
188                                 rsvd_region[j] = rsvd_region[j + 1];
189                                 rsvd_region[j + 1] = tmp;
190                         }
191                 }
192         }
193 }
194
195 /*
196  * Request address space for all standard resources
197  */
198 static int __init register_memory(void)
199 {
200         code_resource.start = ia64_tpa(_text);
201         code_resource.end   = ia64_tpa(_etext) - 1;
202         data_resource.start = ia64_tpa(_etext);
203         data_resource.end   = ia64_tpa(_end) - 1;
204         efi_initialize_iomem_resources(&code_resource, &data_resource);
205
206         return 0;
207 }
208
209 __initcall(register_memory);
210
211
212 #ifdef CONFIG_KEXEC
213 static void __init setup_crashkernel(unsigned long total, int *n)
214 {
215         unsigned long long base = 0, size = 0;
216         int ret;
217
218         ret = parse_crashkernel(boot_command_line, total,
219                         &size, &base);
220         if (ret == 0 && size > 0) {
221                 if (!base) {
222                         sort_regions(rsvd_region, *n);
223                         base = kdump_find_rsvd_region(size,
224                                         rsvd_region, *n);
225                 }
226                 if (base != ~0UL) {
227                         printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
228                                         "for crashkernel (System RAM: %ldMB)\n",
229                                         (unsigned long)(size >> 20),
230                                         (unsigned long)(base >> 20),
231                                         (unsigned long)(total >> 20));
232                         rsvd_region[*n].start =
233                                 (unsigned long)__va(base);
234                         rsvd_region[*n].end =
235                                 (unsigned long)__va(base + size);
236                         (*n)++;
237                         crashk_res.start = base;
238                         crashk_res.end = base + size - 1;
239                 }
240         }
241         efi_memmap_res.start = ia64_boot_param->efi_memmap;
242         efi_memmap_res.end = efi_memmap_res.start +
243                 ia64_boot_param->efi_memmap_size;
244         boot_param_res.start = __pa(ia64_boot_param);
245         boot_param_res.end = boot_param_res.start +
246                 sizeof(*ia64_boot_param);
247 }
248 #else
249 static inline void __init setup_crashkernel(unsigned long total, int *n)
250 {}
251 #endif
252
253 /**
254  * reserve_memory - setup reserved memory areas
255  *
256  * Setup the reserved memory areas set aside for the boot parameters,
257  * initrd, etc.  There are currently %IA64_MAX_RSVD_REGIONS defined,
258  * see include/asm-ia64/meminit.h if you need to define more.
259  */
260 void __init
261 reserve_memory (void)
262 {
263         int n = 0;
264         unsigned long total_memory;
265
266         /*
267          * none of the entries in this table overlap
268          */
269         rsvd_region[n].start = (unsigned long) ia64_boot_param;
270         rsvd_region[n].end   = rsvd_region[n].start + sizeof(*ia64_boot_param);
271         n++;
272
273         rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
274         rsvd_region[n].end   = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
275         n++;
276
277         rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
278         rsvd_region[n].end   = (rsvd_region[n].start
279                                 + strlen(__va(ia64_boot_param->command_line)) + 1);
280         n++;
281
282         rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
283         rsvd_region[n].end   = (unsigned long) ia64_imva(_end);
284         n++;
285
286 #ifdef CONFIG_BLK_DEV_INITRD
287         if (ia64_boot_param->initrd_start) {
288                 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
289                 rsvd_region[n].end   = rsvd_region[n].start + ia64_boot_param->initrd_size;
290                 n++;
291         }
292 #endif
293
294 #ifdef CONFIG_PROC_VMCORE
295         if (reserve_elfcorehdr(&rsvd_region[n].start,
296                                &rsvd_region[n].end) == 0)
297                 n++;
298 #endif
299
300         total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
301         n++;
302
303         setup_crashkernel(total_memory, &n);
304
305         /* end of memory marker */
306         rsvd_region[n].start = ~0UL;
307         rsvd_region[n].end   = ~0UL;
308         n++;
309
310         num_rsvd_regions = n;
311         BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
312
313         sort_regions(rsvd_region, num_rsvd_regions);
314 }
315
316
317 /**
318  * find_initrd - get initrd parameters from the boot parameter structure
319  *
320  * Grab the initrd start and end from the boot parameter struct given us by
321  * the boot loader.
322  */
323 void __init
324 find_initrd (void)
325 {
326 #ifdef CONFIG_BLK_DEV_INITRD
327         if (ia64_boot_param->initrd_start) {
328                 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
329                 initrd_end   = initrd_start+ia64_boot_param->initrd_size;
330
331                 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
332                        initrd_start, ia64_boot_param->initrd_size);
333         }
334 #endif
335 }
336
337 static void __init
338 io_port_init (void)
339 {
340         unsigned long phys_iobase;
341
342         /*
343          * Set `iobase' based on the EFI memory map or, failing that, the
344          * value firmware left in ar.k0.
345          *
346          * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
347          * the port's virtual address, so ia32_load_state() loads it with a
348          * user virtual address.  But in ia64 mode, glibc uses the
349          * *physical* address in ar.k0 to mmap the appropriate area from
350          * /dev/mem, and the inX()/outX() interfaces use MMIO.  In both
351          * cases, user-mode can only use the legacy 0-64K I/O port space.
352          *
353          * ar.k0 is not involved in kernel I/O port accesses, which can use
354          * any of the I/O port spaces and are done via MMIO using the
355          * virtual mmio_base from the appropriate io_space[].
356          */
357         phys_iobase = efi_get_iobase();
358         if (!phys_iobase) {
359                 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
360                 printk(KERN_INFO "No I/O port range found in EFI memory map, "
361                         "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
362         }
363         ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
364         ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
365
366         /* setup legacy IO port space */
367         io_space[0].mmio_base = ia64_iobase;
368         io_space[0].sparse = 1;
369         num_io_spaces = 1;
370 }
371
372 /**
373  * early_console_setup - setup debugging console
374  *
375  * Consoles started here require little enough setup that we can start using
376  * them very early in the boot process, either right after the machine
377  * vector initialization, or even before if the drivers can detect their hw.
378  *
379  * Returns non-zero if a console couldn't be setup.
380  */
381 static inline int __init
382 early_console_setup (char *cmdline)
383 {
384         int earlycons = 0;
385
386 #ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
387         {
388                 extern int sn_serial_console_early_setup(void);
389                 if (!sn_serial_console_early_setup())
390                         earlycons++;
391         }
392 #endif
393 #ifdef CONFIG_EFI_PCDP
394         if (!efi_setup_pcdp_console(cmdline))
395                 earlycons++;
396 #endif
397         if (!simcons_register())
398                 earlycons++;
399
400         return (earlycons) ? 0 : -1;
401 }
402
403 static inline void
404 mark_bsp_online (void)
405 {
406 #ifdef CONFIG_SMP
407         /* If we register an early console, allow CPU 0 to printk */
408         cpu_set(smp_processor_id(), cpu_online_map);
409 #endif
410 }
411
412 #ifdef CONFIG_SMP
413 static void __init
414 check_for_logical_procs (void)
415 {
416         pal_logical_to_physical_t info;
417         s64 status;
418
419         status = ia64_pal_logical_to_phys(0, &info);
420         if (status == -1) {
421                 printk(KERN_INFO "No logical to physical processor mapping "
422                        "available\n");
423                 return;
424         }
425         if (status) {
426                 printk(KERN_ERR "ia64_pal_logical_to_phys failed with %ld\n",
427                        status);
428                 return;
429         }
430         /*
431          * Total number of siblings that BSP has.  Though not all of them 
432          * may have booted successfully. The correct number of siblings 
433          * booted is in info.overview_num_log.
434          */
435         smp_num_siblings = info.overview_tpc;
436         smp_num_cpucores = info.overview_cpp;
437 }
438 #endif
439
440 static __initdata int nomca;
441 static __init int setup_nomca(char *s)
442 {
443         nomca = 1;
444         return 0;
445 }
446 early_param("nomca", setup_nomca);
447
448 #ifdef CONFIG_PROC_VMCORE
449 /* elfcorehdr= specifies the location of elf core header
450  * stored by the crashed kernel.
451  */
452 static int __init parse_elfcorehdr(char *arg)
453 {
454         if (!arg)
455                 return -EINVAL;
456
457         elfcorehdr_addr = memparse(arg, &arg);
458         return 0;
459 }
460 early_param("elfcorehdr", parse_elfcorehdr);
461
462 int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
463 {
464         unsigned long length;
465
466         /* We get the address using the kernel command line,
467          * but the size is extracted from the EFI tables.
468          * Both address and size are required for reservation
469          * to work properly.
470          */
471
472         if (elfcorehdr_addr >= ELFCORE_ADDR_MAX)
473                 return -EINVAL;
474
475         if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
476                 elfcorehdr_addr = ELFCORE_ADDR_MAX;
477                 return -EINVAL;
478         }
479
480         *start = (unsigned long)__va(elfcorehdr_addr);
481         *end = *start + length;
482         return 0;
483 }
484
485 #endif /* CONFIG_PROC_VMCORE */
486
487 void __init
488 setup_arch (char **cmdline_p)
489 {
490         unw_init();
491
492         ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
493
494         *cmdline_p = __va(ia64_boot_param->command_line);
495         strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
496
497         efi_init();
498         io_port_init();
499
500 #ifdef CONFIG_IA64_GENERIC
501         /* machvec needs to be parsed from the command line
502          * before parse_early_param() is called to ensure
503          * that ia64_mv is initialised before any command line
504          * settings may cause console setup to occur
505          */
506         machvec_init_from_cmdline(*cmdline_p);
507 #endif
508
509         parse_early_param();
510
511         if (early_console_setup(*cmdline_p) == 0)
512                 mark_bsp_online();
513
514 #ifdef CONFIG_ACPI
515         /* Initialize the ACPI boot-time table parser */
516         acpi_table_init();
517 # ifdef CONFIG_ACPI_NUMA
518         acpi_numa_init();
519 # endif
520 #else
521 # ifdef CONFIG_SMP
522         smp_build_cpu_map();    /* happens, e.g., with the Ski simulator */
523 # endif
524 #endif /* CONFIG_APCI_BOOT */
525
526         find_memory();
527
528         /* process SAL system table: */
529         ia64_sal_init(__va(efi.sal_systab));
530
531         ia64_setup_printk_clock();
532
533 #ifdef CONFIG_SMP
534         cpu_physical_id(0) = hard_smp_processor_id();
535         check_for_logical_procs();
536         if (smp_num_cpucores > 1)
537                 printk(KERN_INFO
538                        "cpu package is Multi-Core capable: number of cores=%d\n",
539                        smp_num_cpucores);
540         if (smp_num_siblings > 1)
541                 printk(KERN_INFO
542                        "cpu package is Multi-Threading capable: number of siblings=%d\n",
543                        smp_num_siblings);
544 #endif
545
546         cpu_init();     /* initialize the bootstrap CPU */
547         mmu_context_init();     /* initialize context_id bitmap */
548
549         check_sal_cache_flush();
550
551 #ifdef CONFIG_ACPI
552         acpi_boot_init();
553 #endif
554
555 #ifdef CONFIG_VT
556         if (!conswitchp) {
557 # if defined(CONFIG_DUMMY_CONSOLE)
558                 conswitchp = &dummy_con;
559 # endif
560 # if defined(CONFIG_VGA_CONSOLE)
561                 /*
562                  * Non-legacy systems may route legacy VGA MMIO range to system
563                  * memory.  vga_con probes the MMIO hole, so memory looks like
564                  * a VGA device to it.  The EFI memory map can tell us if it's
565                  * memory so we can avoid this problem.
566                  */
567                 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
568                         conswitchp = &vga_con;
569 # endif
570         }
571 #endif
572
573         /* enable IA-64 Machine Check Abort Handling unless disabled */
574         if (!nomca)
575                 ia64_mca_init();
576
577         platform_setup(cmdline_p);
578         paging_init();
579 }
580
581 /*
582  * Display cpu info for all CPUs.
583  */
584 static int
585 show_cpuinfo (struct seq_file *m, void *v)
586 {
587 #ifdef CONFIG_SMP
588 #       define lpj      c->loops_per_jiffy
589 #       define cpunum   c->cpu
590 #else
591 #       define lpj      loops_per_jiffy
592 #       define cpunum   0
593 #endif
594         static struct {
595                 unsigned long mask;
596                 const char *feature_name;
597         } feature_bits[] = {
598                 { 1UL << 0, "branchlong" },
599                 { 1UL << 1, "spontaneous deferral"},
600                 { 1UL << 2, "16-byte atomic ops" }
601         };
602         char features[128], *cp, *sep;
603         struct cpuinfo_ia64 *c = v;
604         unsigned long mask;
605         unsigned long proc_freq;
606         int i, size;
607
608         mask = c->features;
609
610         /* build the feature string: */
611         memcpy(features, "standard", 9);
612         cp = features;
613         size = sizeof(features);
614         sep = "";
615         for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
616                 if (mask & feature_bits[i].mask) {
617                         cp += snprintf(cp, size, "%s%s", sep,
618                                        feature_bits[i].feature_name),
619                         sep = ", ";
620                         mask &= ~feature_bits[i].mask;
621                         size = sizeof(features) - (cp - features);
622                 }
623         }
624         if (mask && size > 1) {
625                 /* print unknown features as a hex value */
626                 snprintf(cp, size, "%s0x%lx", sep, mask);
627         }
628
629         proc_freq = cpufreq_quick_get(cpunum);
630         if (!proc_freq)
631                 proc_freq = c->proc_freq / 1000;
632
633         seq_printf(m,
634                    "processor  : %d\n"
635                    "vendor     : %s\n"
636                    "arch       : IA-64\n"
637                    "family     : %u\n"
638                    "model      : %u\n"
639                    "model name : %s\n"
640                    "revision   : %u\n"
641                    "archrev    : %u\n"
642                    "features   : %s\n"
643                    "cpu number : %lu\n"
644                    "cpu regs   : %u\n"
645                    "cpu MHz    : %lu.%03lu\n"
646                    "itc MHz    : %lu.%06lu\n"
647                    "BogoMIPS   : %lu.%02lu\n",
648                    cpunum, c->vendor, c->family, c->model,
649                    c->model_name, c->revision, c->archrev,
650                    features, c->ppn, c->number,
651                    proc_freq / 1000, proc_freq % 1000,
652                    c->itc_freq / 1000000, c->itc_freq % 1000000,
653                    lpj*HZ/500000, (lpj*HZ/5000) % 100);
654 #ifdef CONFIG_SMP
655         seq_printf(m, "siblings   : %u\n", cpus_weight(cpu_core_map[cpunum]));
656         if (c->threads_per_core > 1 || c->cores_per_socket > 1)
657                 seq_printf(m,
658                            "physical id: %u\n"
659                            "core id    : %u\n"
660                            "thread id  : %u\n",
661                            c->socket_id, c->core_id, c->thread_id);
662 #endif
663         seq_printf(m,"\n");
664
665         return 0;
666 }
667
668 static void *
669 c_start (struct seq_file *m, loff_t *pos)
670 {
671 #ifdef CONFIG_SMP
672         while (*pos < NR_CPUS && !cpu_isset(*pos, cpu_online_map))
673                 ++*pos;
674 #endif
675         return *pos < NR_CPUS ? cpu_data(*pos) : NULL;
676 }
677
678 static void *
679 c_next (struct seq_file *m, void *v, loff_t *pos)
680 {
681         ++*pos;
682         return c_start(m, pos);
683 }
684
685 static void
686 c_stop (struct seq_file *m, void *v)
687 {
688 }
689
690 struct seq_operations cpuinfo_op = {
691         .start =        c_start,
692         .next =         c_next,
693         .stop =         c_stop,
694         .show =         show_cpuinfo
695 };
696
697 #define MAX_BRANDS      8
698 static char brandname[MAX_BRANDS][128];
699
700 static char * __cpuinit
701 get_model_name(__u8 family, __u8 model)
702 {
703         static int overflow;
704         char brand[128];
705         int i;
706
707         memcpy(brand, "Unknown", 8);
708         if (ia64_pal_get_brand_info(brand)) {
709                 if (family == 0x7)
710                         memcpy(brand, "Merced", 7);
711                 else if (family == 0x1f) switch (model) {
712                         case 0: memcpy(brand, "McKinley", 9); break;
713                         case 1: memcpy(brand, "Madison", 8); break;
714                         case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
715                 }
716         }
717         for (i = 0; i < MAX_BRANDS; i++)
718                 if (strcmp(brandname[i], brand) == 0)
719                         return brandname[i];
720         for (i = 0; i < MAX_BRANDS; i++)
721                 if (brandname[i][0] == '\0')
722                         return strcpy(brandname[i], brand);
723         if (overflow++ == 0)
724                 printk(KERN_ERR
725                        "%s: Table overflow. Some processor model information will be missing\n",
726                        __FUNCTION__);
727         return "Unknown";
728 }
729
730 static void __cpuinit
731 identify_cpu (struct cpuinfo_ia64 *c)
732 {
733         union {
734                 unsigned long bits[5];
735                 struct {
736                         /* id 0 & 1: */
737                         char vendor[16];
738
739                         /* id 2 */
740                         u64 ppn;                /* processor serial number */
741
742                         /* id 3: */
743                         unsigned number         :  8;
744                         unsigned revision       :  8;
745                         unsigned model          :  8;
746                         unsigned family         :  8;
747                         unsigned archrev        :  8;
748                         unsigned reserved       : 24;
749
750                         /* id 4: */
751                         u64 features;
752                 } field;
753         } cpuid;
754         pal_vm_info_1_u_t vm1;
755         pal_vm_info_2_u_t vm2;
756         pal_status_t status;
757         unsigned long impl_va_msb = 50, phys_addr_size = 44;    /* Itanium defaults */
758         int i;
759         for (i = 0; i < 5; ++i)
760                 cpuid.bits[i] = ia64_get_cpuid(i);
761
762         memcpy(c->vendor, cpuid.field.vendor, 16);
763 #ifdef CONFIG_SMP
764         c->cpu = smp_processor_id();
765
766         /* below default values will be overwritten  by identify_siblings() 
767          * for Multi-Threading/Multi-Core capable CPUs
768          */
769         c->threads_per_core = c->cores_per_socket = c->num_log = 1;
770         c->socket_id = -1;
771
772         identify_siblings(c);
773 #endif
774         c->ppn = cpuid.field.ppn;
775         c->number = cpuid.field.number;
776         c->revision = cpuid.field.revision;
777         c->model = cpuid.field.model;
778         c->family = cpuid.field.family;
779         c->archrev = cpuid.field.archrev;
780         c->features = cpuid.field.features;
781         c->model_name = get_model_name(c->family, c->model);
782
783         status = ia64_pal_vm_summary(&vm1, &vm2);
784         if (status == PAL_STATUS_SUCCESS) {
785                 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
786                 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
787         }
788         c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
789         c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
790 }
791
792 void __init
793 setup_per_cpu_areas (void)
794 {
795         /* start_kernel() requires this... */
796 #ifdef CONFIG_ACPI_HOTPLUG_CPU
797         prefill_possible_map();
798 #endif
799 }
800
801 /*
802  * Calculate the max. cache line size.
803  *
804  * In addition, the minimum of the i-cache stride sizes is calculated for
805  * "flush_icache_range()".
806  */
807 static void __cpuinit
808 get_max_cacheline_size (void)
809 {
810         unsigned long line_size, max = 1;
811         u64 l, levels, unique_caches;
812         pal_cache_config_info_t cci;
813         s64 status;
814
815         status = ia64_pal_cache_summary(&levels, &unique_caches);
816         if (status != 0) {
817                 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
818                        __FUNCTION__, status);
819                 max = SMP_CACHE_BYTES;
820                 /* Safest setup for "flush_icache_range()" */
821                 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
822                 goto out;
823         }
824
825         for (l = 0; l < levels; ++l) {
826                 status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2,
827                                                     &cci);
828                 if (status != 0) {
829                         printk(KERN_ERR
830                                "%s: ia64_pal_cache_config_info(l=%lu, 2) failed (status=%ld)\n",
831                                __FUNCTION__, l, status);
832                         max = SMP_CACHE_BYTES;
833                         /* The safest setup for "flush_icache_range()" */
834                         cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
835                         cci.pcci_unified = 1;
836                 }
837                 line_size = 1 << cci.pcci_line_size;
838                 if (line_size > max)
839                         max = line_size;
840                 if (!cci.pcci_unified) {
841                         status = ia64_pal_cache_config_info(l,
842                                                     /* cache_type (instruction)= */ 1,
843                                                     &cci);
844                         if (status != 0) {
845                                 printk(KERN_ERR
846                                 "%s: ia64_pal_cache_config_info(l=%lu, 1) failed (status=%ld)\n",
847                                         __FUNCTION__, l, status);
848                                 /* The safest setup for "flush_icache_range()" */
849                                 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
850                         }
851                 }
852                 if (cci.pcci_stride < ia64_i_cache_stride_shift)
853                         ia64_i_cache_stride_shift = cci.pcci_stride;
854         }
855   out:
856         if (max > ia64_max_cacheline_size)
857                 ia64_max_cacheline_size = max;
858 }
859
860 /*
861  * cpu_init() initializes state that is per-CPU.  This function acts
862  * as a 'CPU state barrier', nothing should get across.
863  */
864 void __cpuinit
865 cpu_init (void)
866 {
867         extern void __cpuinit ia64_mmu_init (void *);
868         static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
869         unsigned long num_phys_stacked;
870         pal_vm_info_2_u_t vmi;
871         unsigned int max_ctx;
872         struct cpuinfo_ia64 *cpu_info;
873         void *cpu_data;
874
875         cpu_data = per_cpu_init();
876 #ifdef CONFIG_SMP
877         /*
878          * insert boot cpu into sibling and core mapes
879          * (must be done after per_cpu area is setup)
880          */
881         if (smp_processor_id() == 0) {
882                 cpu_set(0, per_cpu(cpu_sibling_map, 0));
883                 cpu_set(0, cpu_core_map[0]);
884         }
885 #endif
886
887         /*
888          * We set ar.k3 so that assembly code in MCA handler can compute
889          * physical addresses of per cpu variables with a simple:
890          *   phys = ar.k3 + &per_cpu_var
891          */
892         ia64_set_kr(IA64_KR_PER_CPU_DATA,
893                     ia64_tpa(cpu_data) - (long) __per_cpu_start);
894
895         get_max_cacheline_size();
896
897         /*
898          * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
899          * ia64_mmu_init() yet.  And we can't call ia64_mmu_init() first because it
900          * depends on the data returned by identify_cpu().  We break the dependency by
901          * accessing cpu_data() through the canonical per-CPU address.
902          */
903         cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
904         identify_cpu(cpu_info);
905
906 #ifdef CONFIG_MCKINLEY
907         {
908 #               define FEATURE_SET 16
909                 struct ia64_pal_retval iprv;
910
911                 if (cpu_info->family == 0x1f) {
912                         PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
913                         if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
914                                 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
915                                               (iprv.v1 | 0x80), FEATURE_SET, 0);
916                 }
917         }
918 #endif
919
920         /* Clear the stack memory reserved for pt_regs: */
921         memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
922
923         ia64_set_kr(IA64_KR_FPU_OWNER, 0);
924
925         /*
926          * Initialize the page-table base register to a global
927          * directory with all zeroes.  This ensure that we can handle
928          * TLB-misses to user address-space even before we created the
929          * first user address-space.  This may happen, e.g., due to
930          * aggressive use of lfetch.fault.
931          */
932         ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
933
934         /*
935          * Initialize default control register to defer speculative faults except
936          * for those arising from TLB misses, which are not deferred.  The
937          * kernel MUST NOT depend on a particular setting of these bits (in other words,
938          * the kernel must have recovery code for all speculative accesses).  Turn on
939          * dcr.lc as per recommendation by the architecture team.  Most IA-32 apps
940          * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
941          * be fine).
942          */
943         ia64_setreg(_IA64_REG_CR_DCR,  (  IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
944                                         | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
945         atomic_inc(&init_mm.mm_count);
946         current->active_mm = &init_mm;
947         if (current->mm)
948                 BUG();
949
950         ia64_mmu_init(ia64_imva(cpu_data));
951         ia64_mca_cpu_init(ia64_imva(cpu_data));
952
953 #ifdef CONFIG_IA32_SUPPORT
954         ia32_cpu_init();
955 #endif
956
957         /* Clear ITC to eliminate sched_clock() overflows in human time.  */
958         ia64_set_itc(0);
959
960         /* disable all local interrupt sources: */
961         ia64_set_itv(1 << 16);
962         ia64_set_lrr0(1 << 16);
963         ia64_set_lrr1(1 << 16);
964         ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
965         ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
966
967         /* clear TPR & XTP to enable all interrupt classes: */
968         ia64_setreg(_IA64_REG_CR_TPR, 0);
969
970         /* Clear any pending interrupts left by SAL/EFI */
971         while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
972                 ia64_eoi();
973
974 #ifdef CONFIG_SMP
975         normal_xtp();
976 #endif
977
978         /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
979         if (ia64_pal_vm_summary(NULL, &vmi) == 0)
980                 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
981         else {
982                 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
983                 max_ctx = (1U << 15) - 1;       /* use architected minimum */
984         }
985         while (max_ctx < ia64_ctx.max_ctx) {
986                 unsigned int old = ia64_ctx.max_ctx;
987                 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
988                         break;
989         }
990
991         if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
992                 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
993                        "stacked regs\n");
994                 num_phys_stacked = 96;
995         }
996         /* size of physical stacked register partition plus 8 bytes: */
997         if (num_phys_stacked > max_num_phys_stacked) {
998                 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
999                 max_num_phys_stacked = num_phys_stacked;
1000         }
1001         platform_cpu_init();
1002         pm_idle = default_idle;
1003 }
1004
1005 void __init
1006 check_bugs (void)
1007 {
1008         ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1009                                (unsigned long) __end___mckinley_e9_bundles);
1010 }
1011
1012 static int __init run_dmi_scan(void)
1013 {
1014         dmi_scan_machine();
1015         return 0;
1016 }
1017 core_initcall(run_dmi_scan);