Merge tag 'spi-fix-v5.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
[linux-2.6-microblaze.git] / arch / ia64 / kernel / setup.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Architecture-specific setup.
4  *
5  * Copyright (C) 1998-2001, 2003-2004 Hewlett-Packard Co
6  *      David Mosberger-Tang <davidm@hpl.hp.com>
7  *      Stephane Eranian <eranian@hpl.hp.com>
8  * Copyright (C) 2000, 2004 Intel Corp
9  *      Rohit Seth <rohit.seth@intel.com>
10  *      Suresh Siddha <suresh.b.siddha@intel.com>
11  *      Gordon Jin <gordon.jin@intel.com>
12  * Copyright (C) 1999 VA Linux Systems
13  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
14  *
15  * 12/26/04 S.Siddha, G.Jin, R.Seth
16  *                      Add multi-threading and multi-core detection
17  * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo().
18  * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map
19  * 03/31/00 R.Seth      cpu_initialized and current->processor fixes
20  * 02/04/00 D.Mosberger some more get_cpuinfo fixes...
21  * 02/01/00 R.Seth      fixed get_cpuinfo for SMP
22  * 01/07/99 S.Eranian   added the support for command line argument
23  * 06/24/99 W.Drummond  added boot_cpu_data.
24  * 05/28/05 Z. Menyhart Dynamic stride size for "flush_icache_range()"
25  */
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/pgtable.h>
29
30 #include <linux/acpi.h>
31 #include <linux/console.h>
32 #include <linux/delay.h>
33 #include <linux/cpu.h>
34 #include <linux/kdev_t.h>
35 #include <linux/kernel.h>
36 #include <linux/memblock.h>
37 #include <linux/reboot.h>
38 #include <linux/sched/mm.h>
39 #include <linux/sched/clock.h>
40 #include <linux/sched/task_stack.h>
41 #include <linux/seq_file.h>
42 #include <linux/string.h>
43 #include <linux/threads.h>
44 #include <linux/screen_info.h>
45 #include <linux/dmi.h>
46 #include <linux/root_dev.h>
47 #include <linux/serial.h>
48 #include <linux/serial_core.h>
49 #include <linux/efi.h>
50 #include <linux/initrd.h>
51 #include <linux/pm.h>
52 #include <linux/cpufreq.h>
53 #include <linux/kexec.h>
54 #include <linux/crash_dump.h>
55
56 #include <asm/mca.h>
57 #include <asm/meminit.h>
58 #include <asm/page.h>
59 #include <asm/patch.h>
60 #include <asm/processor.h>
61 #include <asm/sal.h>
62 #include <asm/sections.h>
63 #include <asm/setup.h>
64 #include <asm/smp.h>
65 #include <asm/tlbflush.h>
66 #include <asm/unistd.h>
67 #include <asm/uv/uv.h>
68 #include <asm/xtp.h>
69
70 #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
71 # error "struct cpuinfo_ia64 too big!"
72 #endif
73
74 char ia64_platform_name[64];
75
76 #ifdef CONFIG_SMP
77 unsigned long __per_cpu_offset[NR_CPUS];
78 EXPORT_SYMBOL(__per_cpu_offset);
79 #endif
80
81 DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
82 EXPORT_SYMBOL(ia64_cpu_info);
83 DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
84 #ifdef CONFIG_SMP
85 EXPORT_SYMBOL(local_per_cpu_offset);
86 #endif
87 unsigned long ia64_cycles_per_usec;
88 struct ia64_boot_param *ia64_boot_param;
89 struct screen_info screen_info;
90 unsigned long vga_console_iobase;
91 unsigned long vga_console_membase;
92
93 static struct resource data_resource = {
94         .name   = "Kernel data",
95         .flags  = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
96 };
97
98 static struct resource code_resource = {
99         .name   = "Kernel code",
100         .flags  = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
101 };
102
103 static struct resource bss_resource = {
104         .name   = "Kernel bss",
105         .flags  = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
106 };
107
108 unsigned long ia64_max_cacheline_size;
109
110 unsigned long ia64_iobase;      /* virtual address for I/O accesses */
111 EXPORT_SYMBOL(ia64_iobase);
112 struct io_space io_space[MAX_IO_SPACES];
113 EXPORT_SYMBOL(io_space);
114 unsigned int num_io_spaces;
115
116 /*
117  * "flush_icache_range()" needs to know what processor dependent stride size to use
118  * when it makes i-cache(s) coherent with d-caches.
119  */
120 #define I_CACHE_STRIDE_SHIFT    5       /* Safest way to go: 32 bytes by 32 bytes */
121 unsigned long ia64_i_cache_stride_shift = ~0;
122 /*
123  * "clflush_cache_range()" needs to know what processor dependent stride size to
124  * use when it flushes cache lines including both d-cache and i-cache.
125  */
126 /* Safest way to go: 32 bytes by 32 bytes */
127 #define CACHE_STRIDE_SHIFT      5
128 unsigned long ia64_cache_stride_shift = ~0;
129
130 /*
131  * We use a special marker for the end of memory and it uses the extra (+1) slot
132  */
133 struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
134 int num_rsvd_regions __initdata;
135
136
137 /*
138  * Filter incoming memory segments based on the primitive map created from the boot
139  * parameters. Segments contained in the map are removed from the memory ranges. A
140  * caller-specified function is called with the memory ranges that remain after filtering.
141  * This routine does not assume the incoming segments are sorted.
142  */
143 int __init
144 filter_rsvd_memory (u64 start, u64 end, void *arg)
145 {
146         u64 range_start, range_end, prev_start;
147         void (*func)(unsigned long, unsigned long, int);
148         int i;
149
150 #if IGNORE_PFN0
151         if (start == PAGE_OFFSET) {
152                 printk(KERN_WARNING "warning: skipping physical page 0\n");
153                 start += PAGE_SIZE;
154                 if (start >= end) return 0;
155         }
156 #endif
157         /*
158          * lowest possible address(walker uses virtual)
159          */
160         prev_start = PAGE_OFFSET;
161         func = arg;
162
163         for (i = 0; i < num_rsvd_regions; ++i) {
164                 range_start = max(start, prev_start);
165                 range_end   = min(end, rsvd_region[i].start);
166
167                 if (range_start < range_end)
168                         call_pernode_memory(__pa(range_start), range_end - range_start, func);
169
170                 /* nothing more available in this segment */
171                 if (range_end == end) return 0;
172
173                 prev_start = rsvd_region[i].end;
174         }
175         /* end of memory marker allows full processing inside loop body */
176         return 0;
177 }
178
179 /*
180  * Similar to "filter_rsvd_memory()", but the reserved memory ranges
181  * are not filtered out.
182  */
183 int __init
184 filter_memory(u64 start, u64 end, void *arg)
185 {
186         void (*func)(unsigned long, unsigned long, int);
187
188 #if IGNORE_PFN0
189         if (start == PAGE_OFFSET) {
190                 printk(KERN_WARNING "warning: skipping physical page 0\n");
191                 start += PAGE_SIZE;
192                 if (start >= end)
193                         return 0;
194         }
195 #endif
196         func = arg;
197         if (start < end)
198                 call_pernode_memory(__pa(start), end - start, func);
199         return 0;
200 }
201
202 static void __init
203 sort_regions (struct rsvd_region *rsvd_region, int max)
204 {
205         int j;
206
207         /* simple bubble sorting */
208         while (max--) {
209                 for (j = 0; j < max; ++j) {
210                         if (rsvd_region[j].start > rsvd_region[j+1].start) {
211                                 struct rsvd_region tmp;
212                                 tmp = rsvd_region[j];
213                                 rsvd_region[j] = rsvd_region[j + 1];
214                                 rsvd_region[j + 1] = tmp;
215                         }
216                 }
217         }
218 }
219
220 /* merge overlaps */
221 static int __init
222 merge_regions (struct rsvd_region *rsvd_region, int max)
223 {
224         int i;
225         for (i = 1; i < max; ++i) {
226                 if (rsvd_region[i].start >= rsvd_region[i-1].end)
227                         continue;
228                 if (rsvd_region[i].end > rsvd_region[i-1].end)
229                         rsvd_region[i-1].end = rsvd_region[i].end;
230                 --max;
231                 memmove(&rsvd_region[i], &rsvd_region[i+1],
232                         (max - i) * sizeof(struct rsvd_region));
233         }
234         return max;
235 }
236
237 /*
238  * Request address space for all standard resources
239  */
240 static int __init register_memory(void)
241 {
242         code_resource.start = ia64_tpa(_text);
243         code_resource.end   = ia64_tpa(_etext) - 1;
244         data_resource.start = ia64_tpa(_etext);
245         data_resource.end   = ia64_tpa(_edata) - 1;
246         bss_resource.start  = ia64_tpa(__bss_start);
247         bss_resource.end    = ia64_tpa(_end) - 1;
248         efi_initialize_iomem_resources(&code_resource, &data_resource,
249                         &bss_resource);
250
251         return 0;
252 }
253
254 __initcall(register_memory);
255
256
257 #ifdef CONFIG_KEXEC
258
259 /*
260  * This function checks if the reserved crashkernel is allowed on the specific
261  * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
262  * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
263  * kernel/dma/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
264  * in kdump case. See the comment in sba_init() in sba_iommu.c.
265  *
266  * So, the only machvec that really supports loading the kdump kernel
267  * over 4 GB is "uv".
268  */
269 static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
270 {
271         if (is_uv_system())
272                 return 1;
273         else
274                 return pbase < (1UL << 32);
275 }
276
277 static void __init setup_crashkernel(unsigned long total, int *n)
278 {
279         unsigned long long base = 0, size = 0;
280         int ret;
281
282         ret = parse_crashkernel(boot_command_line, total,
283                         &size, &base);
284         if (ret == 0 && size > 0) {
285                 if (!base) {
286                         sort_regions(rsvd_region, *n);
287                         *n = merge_regions(rsvd_region, *n);
288                         base = kdump_find_rsvd_region(size,
289                                         rsvd_region, *n);
290                 }
291
292                 if (!check_crashkernel_memory(base, size)) {
293                         pr_warn("crashkernel: There would be kdump memory "
294                                 "at %ld GB but this is unusable because it "
295                                 "must\nbe below 4 GB. Change the memory "
296                                 "configuration of the machine.\n",
297                                 (unsigned long)(base >> 30));
298                         return;
299                 }
300
301                 if (base != ~0UL) {
302                         printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
303                                         "for crashkernel (System RAM: %ldMB)\n",
304                                         (unsigned long)(size >> 20),
305                                         (unsigned long)(base >> 20),
306                                         (unsigned long)(total >> 20));
307                         rsvd_region[*n].start =
308                                 (unsigned long)__va(base);
309                         rsvd_region[*n].end =
310                                 (unsigned long)__va(base + size);
311                         (*n)++;
312                         crashk_res.start = base;
313                         crashk_res.end = base + size - 1;
314                 }
315         }
316         efi_memmap_res.start = ia64_boot_param->efi_memmap;
317         efi_memmap_res.end = efi_memmap_res.start +
318                 ia64_boot_param->efi_memmap_size;
319         boot_param_res.start = __pa(ia64_boot_param);
320         boot_param_res.end = boot_param_res.start +
321                 sizeof(*ia64_boot_param);
322 }
323 #else
324 static inline void __init setup_crashkernel(unsigned long total, int *n)
325 {}
326 #endif
327
328 /**
329  * reserve_memory - setup reserved memory areas
330  *
331  * Setup the reserved memory areas set aside for the boot parameters,
332  * initrd, etc.  There are currently %IA64_MAX_RSVD_REGIONS defined,
333  * see arch/ia64/include/asm/meminit.h if you need to define more.
334  */
335 void __init
336 reserve_memory (void)
337 {
338         int n = 0;
339         unsigned long total_memory;
340
341         /*
342          * none of the entries in this table overlap
343          */
344         rsvd_region[n].start = (unsigned long) ia64_boot_param;
345         rsvd_region[n].end   = rsvd_region[n].start + sizeof(*ia64_boot_param);
346         n++;
347
348         rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
349         rsvd_region[n].end   = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
350         n++;
351
352         rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
353         rsvd_region[n].end   = (rsvd_region[n].start
354                                 + strlen(__va(ia64_boot_param->command_line)) + 1);
355         n++;
356
357         rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
358         rsvd_region[n].end   = (unsigned long) ia64_imva(_end);
359         n++;
360
361 #ifdef CONFIG_BLK_DEV_INITRD
362         if (ia64_boot_param->initrd_start) {
363                 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
364                 rsvd_region[n].end   = rsvd_region[n].start + ia64_boot_param->initrd_size;
365                 n++;
366         }
367 #endif
368
369 #ifdef CONFIG_CRASH_DUMP
370         if (reserve_elfcorehdr(&rsvd_region[n].start,
371                                &rsvd_region[n].end) == 0)
372                 n++;
373 #endif
374
375         total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
376         n++;
377
378         setup_crashkernel(total_memory, &n);
379
380         /* end of memory marker */
381         rsvd_region[n].start = ~0UL;
382         rsvd_region[n].end   = ~0UL;
383         n++;
384
385         num_rsvd_regions = n;
386         BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
387
388         sort_regions(rsvd_region, num_rsvd_regions);
389         num_rsvd_regions = merge_regions(rsvd_region, num_rsvd_regions);
390
391         /* reserve all regions except the end of memory marker with memblock */
392         for (n = 0; n < num_rsvd_regions - 1; n++) {
393                 struct rsvd_region *region = &rsvd_region[n];
394                 phys_addr_t addr = __pa(region->start);
395                 phys_addr_t size = region->end - region->start;
396
397                 memblock_reserve(addr, size);
398         }
399 }
400
401 /**
402  * find_initrd - get initrd parameters from the boot parameter structure
403  *
404  * Grab the initrd start and end from the boot parameter struct given us by
405  * the boot loader.
406  */
407 void __init
408 find_initrd (void)
409 {
410 #ifdef CONFIG_BLK_DEV_INITRD
411         if (ia64_boot_param->initrd_start) {
412                 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
413                 initrd_end   = initrd_start+ia64_boot_param->initrd_size;
414
415                 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%llu bytes)\n",
416                        initrd_start, ia64_boot_param->initrd_size);
417         }
418 #endif
419 }
420
421 static void __init
422 io_port_init (void)
423 {
424         unsigned long phys_iobase;
425
426         /*
427          * Set `iobase' based on the EFI memory map or, failing that, the
428          * value firmware left in ar.k0.
429          *
430          * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
431          * the port's virtual address, so ia32_load_state() loads it with a
432          * user virtual address.  But in ia64 mode, glibc uses the
433          * *physical* address in ar.k0 to mmap the appropriate area from
434          * /dev/mem, and the inX()/outX() interfaces use MMIO.  In both
435          * cases, user-mode can only use the legacy 0-64K I/O port space.
436          *
437          * ar.k0 is not involved in kernel I/O port accesses, which can use
438          * any of the I/O port spaces and are done via MMIO using the
439          * virtual mmio_base from the appropriate io_space[].
440          */
441         phys_iobase = efi_get_iobase();
442         if (!phys_iobase) {
443                 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
444                 printk(KERN_INFO "No I/O port range found in EFI memory map, "
445                         "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
446         }
447         ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
448         ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
449
450         /* setup legacy IO port space */
451         io_space[0].mmio_base = ia64_iobase;
452         io_space[0].sparse = 1;
453         num_io_spaces = 1;
454 }
455
456 /**
457  * early_console_setup - setup debugging console
458  *
459  * Consoles started here require little enough setup that we can start using
460  * them very early in the boot process, either right after the machine
461  * vector initialization, or even before if the drivers can detect their hw.
462  *
463  * Returns non-zero if a console couldn't be setup.
464  */
465 static inline int __init
466 early_console_setup (char *cmdline)
467 {
468 #ifdef CONFIG_EFI_PCDP
469         if (!efi_setup_pcdp_console(cmdline))
470                 return 0;
471 #endif
472         return -1;
473 }
474
475 static void __init
476 screen_info_setup(void)
477 {
478         unsigned int orig_x, orig_y, num_cols, num_rows, font_height;
479
480         memset(&screen_info, 0, sizeof(screen_info));
481
482         if (!ia64_boot_param->console_info.num_rows ||
483             !ia64_boot_param->console_info.num_cols) {
484                 printk(KERN_WARNING "invalid screen-info, guessing 80x25\n");
485                 orig_x = 0;
486                 orig_y = 0;
487                 num_cols = 80;
488                 num_rows = 25;
489                 font_height = 16;
490         } else {
491                 orig_x = ia64_boot_param->console_info.orig_x;
492                 orig_y = ia64_boot_param->console_info.orig_y;
493                 num_cols = ia64_boot_param->console_info.num_cols;
494                 num_rows = ia64_boot_param->console_info.num_rows;
495                 font_height = 400 / num_rows;
496         }
497
498         screen_info.orig_x = orig_x;
499         screen_info.orig_y = orig_y;
500         screen_info.orig_video_cols  = num_cols;
501         screen_info.orig_video_lines = num_rows;
502         screen_info.orig_video_points = font_height;
503         screen_info.orig_video_mode = 3;        /* XXX fake */
504         screen_info.orig_video_isVGA = 1;       /* XXX fake */
505         screen_info.orig_video_ega_bx = 3;      /* XXX fake */
506 }
507
508 static inline void
509 mark_bsp_online (void)
510 {
511 #ifdef CONFIG_SMP
512         /* If we register an early console, allow CPU 0 to printk */
513         set_cpu_online(smp_processor_id(), true);
514 #endif
515 }
516
517 static __initdata int nomca;
518 static __init int setup_nomca(char *s)
519 {
520         nomca = 1;
521         return 0;
522 }
523 early_param("nomca", setup_nomca);
524
525 #ifdef CONFIG_CRASH_DUMP
526 int __init reserve_elfcorehdr(u64 *start, u64 *end)
527 {
528         u64 length;
529
530         /* We get the address using the kernel command line,
531          * but the size is extracted from the EFI tables.
532          * Both address and size are required for reservation
533          * to work properly.
534          */
535
536         if (!is_vmcore_usable())
537                 return -EINVAL;
538
539         if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
540                 vmcore_unusable();
541                 return -EINVAL;
542         }
543
544         *start = (unsigned long)__va(elfcorehdr_addr);
545         *end = *start + length;
546         return 0;
547 }
548
549 #endif /* CONFIG_PROC_VMCORE */
550
551 void __init
552 setup_arch (char **cmdline_p)
553 {
554         unw_init();
555
556         ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
557
558         *cmdline_p = __va(ia64_boot_param->command_line);
559         strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
560
561         efi_init();
562         io_port_init();
563
564         uv_probe_system_type();
565         parse_early_param();
566
567         if (early_console_setup(*cmdline_p) == 0)
568                 mark_bsp_online();
569
570         /* Initialize the ACPI boot-time table parser */
571         acpi_table_init();
572         early_acpi_boot_init();
573 #ifdef CONFIG_ACPI_NUMA
574         acpi_numa_init();
575         acpi_numa_fixup();
576 #ifdef CONFIG_ACPI_HOTPLUG_CPU
577         prefill_possible_map();
578 #endif
579         per_cpu_scan_finalize((cpumask_weight(&early_cpu_possible_map) == 0 ?
580                 32 : cpumask_weight(&early_cpu_possible_map)),
581                 additional_cpus > 0 ? additional_cpus : 0);
582 #endif /* CONFIG_ACPI_NUMA */
583
584 #ifdef CONFIG_SMP
585         smp_build_cpu_map();
586 #endif
587         find_memory();
588
589         /* process SAL system table: */
590         ia64_sal_init(__va(sal_systab_phys));
591
592 #ifdef CONFIG_ITANIUM
593         ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
594 #else
595         {
596                 unsigned long num_phys_stacked;
597
598                 if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
599                         ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
600         }
601 #endif
602
603 #ifdef CONFIG_SMP
604         cpu_physical_id(0) = hard_smp_processor_id();
605 #endif
606
607         cpu_init();     /* initialize the bootstrap CPU */
608         mmu_context_init();     /* initialize context_id bitmap */
609
610 #ifdef CONFIG_VT
611         if (!conswitchp) {
612 # if defined(CONFIG_VGA_CONSOLE)
613                 /*
614                  * Non-legacy systems may route legacy VGA MMIO range to system
615                  * memory.  vga_con probes the MMIO hole, so memory looks like
616                  * a VGA device to it.  The EFI memory map can tell us if it's
617                  * memory so we can avoid this problem.
618                  */
619                 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
620                         conswitchp = &vga_con;
621 # endif
622         }
623 #endif
624
625         /* enable IA-64 Machine Check Abort Handling unless disabled */
626         if (!nomca)
627                 ia64_mca_init();
628
629         /*
630          * Default to /dev/sda2.  This assumes that the EFI partition
631          * is physical disk 1 partition 1 and the Linux root disk is
632          * physical disk 1 partition 2.
633          */
634         ROOT_DEV = Root_SDA2;           /* default to second partition on first drive */
635
636         if (is_uv_system())
637                 uv_setup(cmdline_p);
638 #ifdef CONFIG_SMP
639         else
640                 init_smp_config();
641 #endif
642
643         screen_info_setup();
644         paging_init();
645
646         clear_sched_clock_stable();
647 }
648
649 /*
650  * Display cpu info for all CPUs.
651  */
652 static int
653 show_cpuinfo (struct seq_file *m, void *v)
654 {
655 #ifdef CONFIG_SMP
656 #       define lpj      c->loops_per_jiffy
657 #       define cpunum   c->cpu
658 #else
659 #       define lpj      loops_per_jiffy
660 #       define cpunum   0
661 #endif
662         static struct {
663                 unsigned long mask;
664                 const char *feature_name;
665         } feature_bits[] = {
666                 { 1UL << 0, "branchlong" },
667                 { 1UL << 1, "spontaneous deferral"},
668                 { 1UL << 2, "16-byte atomic ops" }
669         };
670         char features[128], *cp, *sep;
671         struct cpuinfo_ia64 *c = v;
672         unsigned long mask;
673         unsigned long proc_freq;
674         int i, size;
675
676         mask = c->features;
677
678         /* build the feature string: */
679         memcpy(features, "standard", 9);
680         cp = features;
681         size = sizeof(features);
682         sep = "";
683         for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
684                 if (mask & feature_bits[i].mask) {
685                         cp += snprintf(cp, size, "%s%s", sep,
686                                        feature_bits[i].feature_name),
687                         sep = ", ";
688                         mask &= ~feature_bits[i].mask;
689                         size = sizeof(features) - (cp - features);
690                 }
691         }
692         if (mask && size > 1) {
693                 /* print unknown features as a hex value */
694                 snprintf(cp, size, "%s0x%lx", sep, mask);
695         }
696
697         proc_freq = cpufreq_quick_get(cpunum);
698         if (!proc_freq)
699                 proc_freq = c->proc_freq / 1000;
700
701         seq_printf(m,
702                    "processor  : %d\n"
703                    "vendor     : %s\n"
704                    "arch       : IA-64\n"
705                    "family     : %u\n"
706                    "model      : %u\n"
707                    "model name : %s\n"
708                    "revision   : %u\n"
709                    "archrev    : %u\n"
710                    "features   : %s\n"
711                    "cpu number : %lu\n"
712                    "cpu regs   : %u\n"
713                    "cpu MHz    : %lu.%03lu\n"
714                    "itc MHz    : %lu.%06lu\n"
715                    "BogoMIPS   : %lu.%02lu\n",
716                    cpunum, c->vendor, c->family, c->model,
717                    c->model_name, c->revision, c->archrev,
718                    features, c->ppn, c->number,
719                    proc_freq / 1000, proc_freq % 1000,
720                    c->itc_freq / 1000000, c->itc_freq % 1000000,
721                    lpj*HZ/500000, (lpj*HZ/5000) % 100);
722 #ifdef CONFIG_SMP
723         seq_printf(m, "siblings   : %u\n",
724                    cpumask_weight(&cpu_core_map[cpunum]));
725         if (c->socket_id != -1)
726                 seq_printf(m, "physical id: %u\n", c->socket_id);
727         if (c->threads_per_core > 1 || c->cores_per_socket > 1)
728                 seq_printf(m,
729                            "core id    : %u\n"
730                            "thread id  : %u\n",
731                            c->core_id, c->thread_id);
732 #endif
733         seq_printf(m,"\n");
734
735         return 0;
736 }
737
738 static void *
739 c_start (struct seq_file *m, loff_t *pos)
740 {
741 #ifdef CONFIG_SMP
742         while (*pos < nr_cpu_ids && !cpu_online(*pos))
743                 ++*pos;
744 #endif
745         return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL;
746 }
747
748 static void *
749 c_next (struct seq_file *m, void *v, loff_t *pos)
750 {
751         ++*pos;
752         return c_start(m, pos);
753 }
754
755 static void
756 c_stop (struct seq_file *m, void *v)
757 {
758 }
759
760 const struct seq_operations cpuinfo_op = {
761         .start =        c_start,
762         .next =         c_next,
763         .stop =         c_stop,
764         .show =         show_cpuinfo
765 };
766
767 #define MAX_BRANDS      8
768 static char brandname[MAX_BRANDS][128];
769
770 static char *
771 get_model_name(__u8 family, __u8 model)
772 {
773         static int overflow;
774         char brand[128];
775         int i;
776
777         memcpy(brand, "Unknown", 8);
778         if (ia64_pal_get_brand_info(brand)) {
779                 if (family == 0x7)
780                         memcpy(brand, "Merced", 7);
781                 else if (family == 0x1f) switch (model) {
782                         case 0: memcpy(brand, "McKinley", 9); break;
783                         case 1: memcpy(brand, "Madison", 8); break;
784                         case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
785                 }
786         }
787         for (i = 0; i < MAX_BRANDS; i++)
788                 if (strcmp(brandname[i], brand) == 0)
789                         return brandname[i];
790         for (i = 0; i < MAX_BRANDS; i++)
791                 if (brandname[i][0] == '\0')
792                         return strcpy(brandname[i], brand);
793         if (overflow++ == 0)
794                 printk(KERN_ERR
795                        "%s: Table overflow. Some processor model information will be missing\n",
796                        __func__);
797         return "Unknown";
798 }
799
800 static void
801 identify_cpu (struct cpuinfo_ia64 *c)
802 {
803         union {
804                 unsigned long bits[5];
805                 struct {
806                         /* id 0 & 1: */
807                         char vendor[16];
808
809                         /* id 2 */
810                         u64 ppn;                /* processor serial number */
811
812                         /* id 3: */
813                         unsigned number         :  8;
814                         unsigned revision       :  8;
815                         unsigned model          :  8;
816                         unsigned family         :  8;
817                         unsigned archrev        :  8;
818                         unsigned reserved       : 24;
819
820                         /* id 4: */
821                         u64 features;
822                 } field;
823         } cpuid;
824         pal_vm_info_1_u_t vm1;
825         pal_vm_info_2_u_t vm2;
826         pal_status_t status;
827         unsigned long impl_va_msb = 50, phys_addr_size = 44;    /* Itanium defaults */
828         int i;
829         for (i = 0; i < 5; ++i)
830                 cpuid.bits[i] = ia64_get_cpuid(i);
831
832         memcpy(c->vendor, cpuid.field.vendor, 16);
833 #ifdef CONFIG_SMP
834         c->cpu = smp_processor_id();
835
836         /* below default values will be overwritten  by identify_siblings() 
837          * for Multi-Threading/Multi-Core capable CPUs
838          */
839         c->threads_per_core = c->cores_per_socket = c->num_log = 1;
840         c->socket_id = -1;
841
842         identify_siblings(c);
843
844         if (c->threads_per_core > smp_num_siblings)
845                 smp_num_siblings = c->threads_per_core;
846 #endif
847         c->ppn = cpuid.field.ppn;
848         c->number = cpuid.field.number;
849         c->revision = cpuid.field.revision;
850         c->model = cpuid.field.model;
851         c->family = cpuid.field.family;
852         c->archrev = cpuid.field.archrev;
853         c->features = cpuid.field.features;
854         c->model_name = get_model_name(c->family, c->model);
855
856         status = ia64_pal_vm_summary(&vm1, &vm2);
857         if (status == PAL_STATUS_SUCCESS) {
858                 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
859                 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
860         }
861         c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
862         c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
863 }
864
865 /*
866  * Do the following calculations:
867  *
868  * 1. the max. cache line size.
869  * 2. the minimum of the i-cache stride sizes for "flush_icache_range()".
870  * 3. the minimum of the cache stride sizes for "clflush_cache_range()".
871  */
872 static void
873 get_cache_info(void)
874 {
875         unsigned long line_size, max = 1;
876         unsigned long l, levels, unique_caches;
877         pal_cache_config_info_t cci;
878         long status;
879
880         status = ia64_pal_cache_summary(&levels, &unique_caches);
881         if (status != 0) {
882                 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
883                        __func__, status);
884                 max = SMP_CACHE_BYTES;
885                 /* Safest setup for "flush_icache_range()" */
886                 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
887                 /* Safest setup for "clflush_cache_range()" */
888                 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
889                 goto out;
890         }
891
892         for (l = 0; l < levels; ++l) {
893                 /* cache_type (data_or_unified)=2 */
894                 status = ia64_pal_cache_config_info(l, 2, &cci);
895                 if (status != 0) {
896                         printk(KERN_ERR "%s: ia64_pal_cache_config_info"
897                                 "(l=%lu, 2) failed (status=%ld)\n",
898                                 __func__, l, status);
899                         max = SMP_CACHE_BYTES;
900                         /* The safest setup for "flush_icache_range()" */
901                         cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
902                         /* The safest setup for "clflush_cache_range()" */
903                         ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
904                         cci.pcci_unified = 1;
905                 } else {
906                         if (cci.pcci_stride < ia64_cache_stride_shift)
907                                 ia64_cache_stride_shift = cci.pcci_stride;
908
909                         line_size = 1 << cci.pcci_line_size;
910                         if (line_size > max)
911                                 max = line_size;
912                 }
913
914                 if (!cci.pcci_unified) {
915                         /* cache_type (instruction)=1*/
916                         status = ia64_pal_cache_config_info(l, 1, &cci);
917                         if (status != 0) {
918                                 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
919                                         "(l=%lu, 1) failed (status=%ld)\n",
920                                         __func__, l, status);
921                                 /* The safest setup for flush_icache_range() */
922                                 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
923                         }
924                 }
925                 if (cci.pcci_stride < ia64_i_cache_stride_shift)
926                         ia64_i_cache_stride_shift = cci.pcci_stride;
927         }
928   out:
929         if (max > ia64_max_cacheline_size)
930                 ia64_max_cacheline_size = max;
931 }
932
933 /*
934  * cpu_init() initializes state that is per-CPU.  This function acts
935  * as a 'CPU state barrier', nothing should get across.
936  */
937 void
938 cpu_init (void)
939 {
940         extern void ia64_mmu_init(void *);
941         static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
942         unsigned long num_phys_stacked;
943         pal_vm_info_2_u_t vmi;
944         unsigned int max_ctx;
945         struct cpuinfo_ia64 *cpu_info;
946         void *cpu_data;
947
948         cpu_data = per_cpu_init();
949 #ifdef CONFIG_SMP
950         /*
951          * insert boot cpu into sibling and core mapes
952          * (must be done after per_cpu area is setup)
953          */
954         if (smp_processor_id() == 0) {
955                 cpumask_set_cpu(0, &per_cpu(cpu_sibling_map, 0));
956                 cpumask_set_cpu(0, &cpu_core_map[0]);
957         } else {
958                 /*
959                  * Set ar.k3 so that assembly code in MCA handler can compute
960                  * physical addresses of per cpu variables with a simple:
961                  *   phys = ar.k3 + &per_cpu_var
962                  * and the alt-dtlb-miss handler can set per-cpu mapping into
963                  * the TLB when needed. head.S already did this for cpu0.
964                  */
965                 ia64_set_kr(IA64_KR_PER_CPU_DATA,
966                             ia64_tpa(cpu_data) - (long) __per_cpu_start);
967         }
968 #endif
969
970         get_cache_info();
971
972         /*
973          * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
974          * ia64_mmu_init() yet.  And we can't call ia64_mmu_init() first because it
975          * depends on the data returned by identify_cpu().  We break the dependency by
976          * accessing cpu_data() through the canonical per-CPU address.
977          */
978         cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
979         identify_cpu(cpu_info);
980
981 #ifdef CONFIG_MCKINLEY
982         {
983 #               define FEATURE_SET 16
984                 struct ia64_pal_retval iprv;
985
986                 if (cpu_info->family == 0x1f) {
987                         PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
988                         if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
989                                 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
990                                               (iprv.v1 | 0x80), FEATURE_SET, 0);
991                 }
992         }
993 #endif
994
995         /* Clear the stack memory reserved for pt_regs: */
996         memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
997
998         ia64_set_kr(IA64_KR_FPU_OWNER, 0);
999
1000         /*
1001          * Initialize the page-table base register to a global
1002          * directory with all zeroes.  This ensure that we can handle
1003          * TLB-misses to user address-space even before we created the
1004          * first user address-space.  This may happen, e.g., due to
1005          * aggressive use of lfetch.fault.
1006          */
1007         ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
1008
1009         /*
1010          * Initialize default control register to defer speculative faults except
1011          * for those arising from TLB misses, which are not deferred.  The
1012          * kernel MUST NOT depend on a particular setting of these bits (in other words,
1013          * the kernel must have recovery code for all speculative accesses).  Turn on
1014          * dcr.lc as per recommendation by the architecture team.  Most IA-32 apps
1015          * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
1016          * be fine).
1017          */
1018         ia64_setreg(_IA64_REG_CR_DCR,  (  IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
1019                                         | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
1020         mmgrab(&init_mm);
1021         current->active_mm = &init_mm;
1022         BUG_ON(current->mm);
1023
1024         ia64_mmu_init(ia64_imva(cpu_data));
1025         ia64_mca_cpu_init(ia64_imva(cpu_data));
1026
1027         /* Clear ITC to eliminate sched_clock() overflows in human time.  */
1028         ia64_set_itc(0);
1029
1030         /* disable all local interrupt sources: */
1031         ia64_set_itv(1 << 16);
1032         ia64_set_lrr0(1 << 16);
1033         ia64_set_lrr1(1 << 16);
1034         ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
1035         ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
1036
1037         /* clear TPR & XTP to enable all interrupt classes: */
1038         ia64_setreg(_IA64_REG_CR_TPR, 0);
1039
1040         /* Clear any pending interrupts left by SAL/EFI */
1041         while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
1042                 ia64_eoi();
1043
1044 #ifdef CONFIG_SMP
1045         normal_xtp();
1046 #endif
1047
1048         /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
1049         if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
1050                 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
1051                 setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
1052         } else {
1053                 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
1054                 max_ctx = (1U << 15) - 1;       /* use architected minimum */
1055         }
1056         while (max_ctx < ia64_ctx.max_ctx) {
1057                 unsigned int old = ia64_ctx.max_ctx;
1058                 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
1059                         break;
1060         }
1061
1062         if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
1063                 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
1064                        "stacked regs\n");
1065                 num_phys_stacked = 96;
1066         }
1067         /* size of physical stacked register partition plus 8 bytes: */
1068         if (num_phys_stacked > max_num_phys_stacked) {
1069                 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
1070                 max_num_phys_stacked = num_phys_stacked;
1071         }
1072 }
1073
1074 void __init
1075 check_bugs (void)
1076 {
1077         ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1078                                (unsigned long) __end___mckinley_e9_bundles);
1079 }
1080
1081 static int __init run_dmi_scan(void)
1082 {
1083         dmi_setup();
1084         return 0;
1085 }
1086 core_initcall(run_dmi_scan);