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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
29#include <linux/acpi.h>
30#include <linux/bootmem.h>
31#include <linux/console.h>
32#include <linux/delay.h>
33#include <linux/cpu.h>
34#include <linux/kernel.h>
35#include <linux/reboot.h>
36#include <linux/sched/mm.h>
37#include <linux/sched/clock.h>
38#include <linux/sched/task_stack.h>
39#include <linux/seq_file.h>
40#include <linux/string.h>
41#include <linux/threads.h>
42#include <linux/screen_info.h>
43#include <linux/dmi.h>
44#include <linux/serial.h>
45#include <linux/serial_core.h>
46#include <linux/efi.h>
47#include <linux/initrd.h>
48#include <linux/pm.h>
49#include <linux/cpufreq.h>
50#include <linux/kexec.h>
51#include <linux/crash_dump.h>
52
53#include <asm/machvec.h>
54#include <asm/mca.h>
55#include <asm/meminit.h>
56#include <asm/page.h>
57#include <asm/patch.h>
58#include <asm/pgtable.h>
59#include <asm/processor.h>
60#include <asm/sal.h>
61#include <asm/sections.h>
62#include <asm/setup.h>
63#include <asm/smp.h>
64#include <asm/tlbflush.h>
65#include <asm/unistd.h>
66#include <asm/hpsim.h>
67
68#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
69# error "struct cpuinfo_ia64 too big!"
70#endif
71
72#ifdef CONFIG_SMP
73unsigned long __per_cpu_offset[NR_CPUS];
74EXPORT_SYMBOL(__per_cpu_offset);
75#endif
76
77DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
78EXPORT_SYMBOL(ia64_cpu_info);
79DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
80#ifdef CONFIG_SMP
81EXPORT_SYMBOL(local_per_cpu_offset);
82#endif
83unsigned long ia64_cycles_per_usec;
84struct ia64_boot_param *ia64_boot_param;
85struct screen_info screen_info;
86unsigned long vga_console_iobase;
87unsigned long vga_console_membase;
88
89static struct resource data_resource = {
90 .name = "Kernel data",
91 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
92};
93
94static struct resource code_resource = {
95 .name = "Kernel code",
96 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
97};
98
99static struct resource bss_resource = {
100 .name = "Kernel bss",
101 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
102};
103
104unsigned long ia64_max_cacheline_size;
105
106unsigned long ia64_iobase; /* virtual address for I/O accesses */
107EXPORT_SYMBOL(ia64_iobase);
108struct io_space io_space[MAX_IO_SPACES];
109EXPORT_SYMBOL(io_space);
110unsigned int num_io_spaces;
111
112/*
113 * "flush_icache_range()" needs to know what processor dependent stride size to use
114 * when it makes i-cache(s) coherent with d-caches.
115 */
116#define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */
117unsigned long ia64_i_cache_stride_shift = ~0;
118/*
119 * "clflush_cache_range()" needs to know what processor dependent stride size to
120 * use when it flushes cache lines including both d-cache and i-cache.
121 */
122/* Safest way to go: 32 bytes by 32 bytes */
123#define CACHE_STRIDE_SHIFT 5
124unsigned long ia64_cache_stride_shift = ~0;
125
126/*
127 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This
128 * mask specifies a mask of address bits that must be 0 in order for two buffers to be
129 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
130 * address of the second buffer must be aligned to (merge_mask+1) in order to be
131 * mergeable). By default, we assume there is no I/O MMU which can merge physically
132 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
133 * page-size of 2^64.
134 */
135unsigned long ia64_max_iommu_merge_mask = ~0UL;
136EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
137
138/*
139 * We use a special marker for the end of memory and it uses the extra (+1) slot
140 */
141struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
142int num_rsvd_regions __initdata;
143
144
145/*
146 * Filter incoming memory segments based on the primitive map created from the boot
147 * parameters. Segments contained in the map are removed from the memory ranges. A
148 * caller-specified function is called with the memory ranges that remain after filtering.
149 * This routine does not assume the incoming segments are sorted.
150 */
151int __init
152filter_rsvd_memory (u64 start, u64 end, void *arg)
153{
154 u64 range_start, range_end, prev_start;
155 void (*func)(unsigned long, unsigned long, int);
156 int i;
157
158#if IGNORE_PFN0
159 if (start == PAGE_OFFSET) {
160 printk(KERN_WARNING "warning: skipping physical page 0\n");
161 start += PAGE_SIZE;
162 if (start >= end) return 0;
163 }
164#endif
165 /*
166 * lowest possible address(walker uses virtual)
167 */
168 prev_start = PAGE_OFFSET;
169 func = arg;
170
171 for (i = 0; i < num_rsvd_regions; ++i) {
172 range_start = max(start, prev_start);
173 range_end = min(end, rsvd_region[i].start);
174
175 if (range_start < range_end)
176 call_pernode_memory(__pa(range_start), range_end - range_start, func);
177
178 /* nothing more available in this segment */
179 if (range_end == end) return 0;
180
181 prev_start = rsvd_region[i].end;
182 }
183 /* end of memory marker allows full processing inside loop body */
184 return 0;
185}
186
187/*
188 * Similar to "filter_rsvd_memory()", but the reserved memory ranges
189 * are not filtered out.
190 */
191int __init
192filter_memory(u64 start, u64 end, void *arg)
193{
194 void (*func)(unsigned long, unsigned long, int);
195
196#if IGNORE_PFN0
197 if (start == PAGE_OFFSET) {
198 printk(KERN_WARNING "warning: skipping physical page 0\n");
199 start += PAGE_SIZE;
200 if (start >= end)
201 return 0;
202 }
203#endif
204 func = arg;
205 if (start < end)
206 call_pernode_memory(__pa(start), end - start, func);
207 return 0;
208}
209
210static void __init
211sort_regions (struct rsvd_region *rsvd_region, int max)
212{
213 int j;
214
215 /* simple bubble sorting */
216 while (max--) {
217 for (j = 0; j < max; ++j) {
218 if (rsvd_region[j].start > rsvd_region[j+1].start) {
219 struct rsvd_region tmp;
220 tmp = rsvd_region[j];
221 rsvd_region[j] = rsvd_region[j + 1];
222 rsvd_region[j + 1] = tmp;
223 }
224 }
225 }
226}
227
228/* merge overlaps */
229static int __init
230merge_regions (struct rsvd_region *rsvd_region, int max)
231{
232 int i;
233 for (i = 1; i < max; ++i) {
234 if (rsvd_region[i].start >= rsvd_region[i-1].end)
235 continue;
236 if (rsvd_region[i].end > rsvd_region[i-1].end)
237 rsvd_region[i-1].end = rsvd_region[i].end;
238 --max;
239 memmove(&rsvd_region[i], &rsvd_region[i+1],
240 (max - i) * sizeof(struct rsvd_region));
241 }
242 return max;
243}
244
245/*
246 * Request address space for all standard resources
247 */
248static int __init register_memory(void)
249{
250 code_resource.start = ia64_tpa(_text);
251 code_resource.end = ia64_tpa(_etext) - 1;
252 data_resource.start = ia64_tpa(_etext);
253 data_resource.end = ia64_tpa(_edata) - 1;
254 bss_resource.start = ia64_tpa(__bss_start);
255 bss_resource.end = ia64_tpa(_end) - 1;
256 efi_initialize_iomem_resources(&code_resource, &data_resource,
257 &bss_resource);
258
259 return 0;
260}
261
262__initcall(register_memory);
263
264
265#ifdef CONFIG_KEXEC
266
267/*
268 * This function checks if the reserved crashkernel is allowed on the specific
269 * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
270 * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
271 * lib/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
272 * in kdump case. See the comment in sba_init() in sba_iommu.c.
273 *
274 * So, the only machvec that really supports loading the kdump kernel
275 * over 4 GB is "sn2".
276 */
277static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
278{
279 if (ia64_platform_is("sn2") || ia64_platform_is("uv"))
280 return 1;
281 else
282 return pbase < (1UL << 32);
283}
284
285static void __init setup_crashkernel(unsigned long total, int *n)
286{
287 unsigned long long base = 0, size = 0;
288 int ret;
289
290 ret = parse_crashkernel(boot_command_line, total,
291 &size, &base);
292 if (ret == 0 && size > 0) {
293 if (!base) {
294 sort_regions(rsvd_region, *n);
295 *n = merge_regions(rsvd_region, *n);
296 base = kdump_find_rsvd_region(size,
297 rsvd_region, *n);
298 }
299
300 if (!check_crashkernel_memory(base, size)) {
301 pr_warning("crashkernel: There would be kdump memory "
302 "at %ld GB but this is unusable because it "
303 "must\nbe below 4 GB. Change the memory "
304 "configuration of the machine.\n",
305 (unsigned long)(base >> 30));
306 return;
307 }
308
309 if (base != ~0UL) {
310 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
311 "for crashkernel (System RAM: %ldMB)\n",
312 (unsigned long)(size >> 20),
313 (unsigned long)(base >> 20),
314 (unsigned long)(total >> 20));
315 rsvd_region[*n].start =
316 (unsigned long)__va(base);
317 rsvd_region[*n].end =
318 (unsigned long)__va(base + size);
319 (*n)++;
320 crashk_res.start = base;
321 crashk_res.end = base + size - 1;
322 }
323 }
324 efi_memmap_res.start = ia64_boot_param->efi_memmap;
325 efi_memmap_res.end = efi_memmap_res.start +
326 ia64_boot_param->efi_memmap_size;
327 boot_param_res.start = __pa(ia64_boot_param);
328 boot_param_res.end = boot_param_res.start +
329 sizeof(*ia64_boot_param);
330}
331#else
332static inline void __init setup_crashkernel(unsigned long total, int *n)
333{}
334#endif
335
336/**
337 * reserve_memory - setup reserved memory areas
338 *
339 * Setup the reserved memory areas set aside for the boot parameters,
340 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
341 * see arch/ia64/include/asm/meminit.h if you need to define more.
342 */
343void __init
344reserve_memory (void)
345{
346 int n = 0;
347 unsigned long total_memory;
348
349 /*
350 * none of the entries in this table overlap
351 */
352 rsvd_region[n].start = (unsigned long) ia64_boot_param;
353 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
354 n++;
355
356 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
357 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
358 n++;
359
360 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
361 rsvd_region[n].end = (rsvd_region[n].start
362 + strlen(__va(ia64_boot_param->command_line)) + 1);
363 n++;
364
365 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
366 rsvd_region[n].end = (unsigned long) ia64_imva(_end);
367 n++;
368
369#ifdef CONFIG_BLK_DEV_INITRD
370 if (ia64_boot_param->initrd_start) {
371 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
372 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
373 n++;
374 }
375#endif
376
377#ifdef CONFIG_CRASH_DUMP
378 if (reserve_elfcorehdr(&rsvd_region[n].start,
379 &rsvd_region[n].end) == 0)
380 n++;
381#endif
382
383 total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
384 n++;
385
386 setup_crashkernel(total_memory, &n);
387
388 /* end of memory marker */
389 rsvd_region[n].start = ~0UL;
390 rsvd_region[n].end = ~0UL;
391 n++;
392
393 num_rsvd_regions = n;
394 BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
395
396 sort_regions(rsvd_region, num_rsvd_regions);
397 num_rsvd_regions = merge_regions(rsvd_region, num_rsvd_regions);
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 */
407void __init
408find_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
421static void __init
422io_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 */
465static inline int __init
466early_console_setup (char *cmdline)
467{
468 int earlycons = 0;
469
470#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
471 {
472 extern int sn_serial_console_early_setup(void);
473 if (!sn_serial_console_early_setup())
474 earlycons++;
475 }
476#endif
477#ifdef CONFIG_EFI_PCDP
478 if (!efi_setup_pcdp_console(cmdline))
479 earlycons++;
480#endif
481 if (!simcons_register())
482 earlycons++;
483
484 return (earlycons) ? 0 : -1;
485}
486
487static inline void
488mark_bsp_online (void)
489{
490#ifdef CONFIG_SMP
491 /* If we register an early console, allow CPU 0 to printk */
492 set_cpu_online(smp_processor_id(), true);
493#endif
494}
495
496static __initdata int nomca;
497static __init int setup_nomca(char *s)
498{
499 nomca = 1;
500 return 0;
501}
502early_param("nomca", setup_nomca);
503
504#ifdef CONFIG_CRASH_DUMP
505int __init reserve_elfcorehdr(u64 *start, u64 *end)
506{
507 u64 length;
508
509 /* We get the address using the kernel command line,
510 * but the size is extracted from the EFI tables.
511 * Both address and size are required for reservation
512 * to work properly.
513 */
514
515 if (!is_vmcore_usable())
516 return -EINVAL;
517
518 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
519 vmcore_unusable();
520 return -EINVAL;
521 }
522
523 *start = (unsigned long)__va(elfcorehdr_addr);
524 *end = *start + length;
525 return 0;
526}
527
528#endif /* CONFIG_PROC_VMCORE */
529
530void __init
531setup_arch (char **cmdline_p)
532{
533 unw_init();
534
535 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
536
537 *cmdline_p = __va(ia64_boot_param->command_line);
538 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
539
540 efi_init();
541 io_port_init();
542
543#ifdef CONFIG_IA64_GENERIC
544 /* machvec needs to be parsed from the command line
545 * before parse_early_param() is called to ensure
546 * that ia64_mv is initialised before any command line
547 * settings may cause console setup to occur
548 */
549 machvec_init_from_cmdline(*cmdline_p);
550#endif
551
552 parse_early_param();
553
554 if (early_console_setup(*cmdline_p) == 0)
555 mark_bsp_online();
556
557#ifdef CONFIG_ACPI
558 /* Initialize the ACPI boot-time table parser */
559 acpi_table_init();
560 early_acpi_boot_init();
561# ifdef CONFIG_ACPI_NUMA
562 acpi_numa_init();
563 acpi_numa_fixup();
564# ifdef CONFIG_ACPI_HOTPLUG_CPU
565 prefill_possible_map();
566# endif
567 per_cpu_scan_finalize((cpumask_weight(&early_cpu_possible_map) == 0 ?
568 32 : cpumask_weight(&early_cpu_possible_map)),
569 additional_cpus > 0 ? additional_cpus : 0);
570# endif
571#endif /* CONFIG_APCI_BOOT */
572
573#ifdef CONFIG_SMP
574 smp_build_cpu_map();
575#endif
576 find_memory();
577
578 /* process SAL system table: */
579 ia64_sal_init(__va(efi.sal_systab));
580
581#ifdef CONFIG_ITANIUM
582 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
583#else
584 {
585 unsigned long num_phys_stacked;
586
587 if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
588 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
589 }
590#endif
591
592#ifdef CONFIG_SMP
593 cpu_physical_id(0) = hard_smp_processor_id();
594#endif
595
596 cpu_init(); /* initialize the bootstrap CPU */
597 mmu_context_init(); /* initialize context_id bitmap */
598
599#ifdef CONFIG_VT
600 if (!conswitchp) {
601# if defined(CONFIG_DUMMY_CONSOLE)
602 conswitchp = &dummy_con;
603# endif
604# if defined(CONFIG_VGA_CONSOLE)
605 /*
606 * Non-legacy systems may route legacy VGA MMIO range to system
607 * memory. vga_con probes the MMIO hole, so memory looks like
608 * a VGA device to it. The EFI memory map can tell us if it's
609 * memory so we can avoid this problem.
610 */
611 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
612 conswitchp = &vga_con;
613# endif
614 }
615#endif
616
617 /* enable IA-64 Machine Check Abort Handling unless disabled */
618 if (!nomca)
619 ia64_mca_init();
620
621 platform_setup(cmdline_p);
622#ifndef CONFIG_IA64_HP_SIM
623 check_sal_cache_flush();
624#endif
625 paging_init();
626
627 clear_sched_clock_stable();
628}
629
630/*
631 * Display cpu info for all CPUs.
632 */
633static int
634show_cpuinfo (struct seq_file *m, void *v)
635{
636#ifdef CONFIG_SMP
637# define lpj c->loops_per_jiffy
638# define cpunum c->cpu
639#else
640# define lpj loops_per_jiffy
641# define cpunum 0
642#endif
643 static struct {
644 unsigned long mask;
645 const char *feature_name;
646 } feature_bits[] = {
647 { 1UL << 0, "branchlong" },
648 { 1UL << 1, "spontaneous deferral"},
649 { 1UL << 2, "16-byte atomic ops" }
650 };
651 char features[128], *cp, *sep;
652 struct cpuinfo_ia64 *c = v;
653 unsigned long mask;
654 unsigned long proc_freq;
655 int i, size;
656
657 mask = c->features;
658
659 /* build the feature string: */
660 memcpy(features, "standard", 9);
661 cp = features;
662 size = sizeof(features);
663 sep = "";
664 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
665 if (mask & feature_bits[i].mask) {
666 cp += snprintf(cp, size, "%s%s", sep,
667 feature_bits[i].feature_name),
668 sep = ", ";
669 mask &= ~feature_bits[i].mask;
670 size = sizeof(features) - (cp - features);
671 }
672 }
673 if (mask && size > 1) {
674 /* print unknown features as a hex value */
675 snprintf(cp, size, "%s0x%lx", sep, mask);
676 }
677
678 proc_freq = cpufreq_quick_get(cpunum);
679 if (!proc_freq)
680 proc_freq = c->proc_freq / 1000;
681
682 seq_printf(m,
683 "processor : %d\n"
684 "vendor : %s\n"
685 "arch : IA-64\n"
686 "family : %u\n"
687 "model : %u\n"
688 "model name : %s\n"
689 "revision : %u\n"
690 "archrev : %u\n"
691 "features : %s\n"
692 "cpu number : %lu\n"
693 "cpu regs : %u\n"
694 "cpu MHz : %lu.%03lu\n"
695 "itc MHz : %lu.%06lu\n"
696 "BogoMIPS : %lu.%02lu\n",
697 cpunum, c->vendor, c->family, c->model,
698 c->model_name, c->revision, c->archrev,
699 features, c->ppn, c->number,
700 proc_freq / 1000, proc_freq % 1000,
701 c->itc_freq / 1000000, c->itc_freq % 1000000,
702 lpj*HZ/500000, (lpj*HZ/5000) % 100);
703#ifdef CONFIG_SMP
704 seq_printf(m, "siblings : %u\n",
705 cpumask_weight(&cpu_core_map[cpunum]));
706 if (c->socket_id != -1)
707 seq_printf(m, "physical id: %u\n", c->socket_id);
708 if (c->threads_per_core > 1 || c->cores_per_socket > 1)
709 seq_printf(m,
710 "core id : %u\n"
711 "thread id : %u\n",
712 c->core_id, c->thread_id);
713#endif
714 seq_printf(m,"\n");
715
716 return 0;
717}
718
719static void *
720c_start (struct seq_file *m, loff_t *pos)
721{
722#ifdef CONFIG_SMP
723 while (*pos < nr_cpu_ids && !cpu_online(*pos))
724 ++*pos;
725#endif
726 return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL;
727}
728
729static void *
730c_next (struct seq_file *m, void *v, loff_t *pos)
731{
732 ++*pos;
733 return c_start(m, pos);
734}
735
736static void
737c_stop (struct seq_file *m, void *v)
738{
739}
740
741const struct seq_operations cpuinfo_op = {
742 .start = c_start,
743 .next = c_next,
744 .stop = c_stop,
745 .show = show_cpuinfo
746};
747
748#define MAX_BRANDS 8
749static char brandname[MAX_BRANDS][128];
750
751static char *
752get_model_name(__u8 family, __u8 model)
753{
754 static int overflow;
755 char brand[128];
756 int i;
757
758 memcpy(brand, "Unknown", 8);
759 if (ia64_pal_get_brand_info(brand)) {
760 if (family == 0x7)
761 memcpy(brand, "Merced", 7);
762 else if (family == 0x1f) switch (model) {
763 case 0: memcpy(brand, "McKinley", 9); break;
764 case 1: memcpy(brand, "Madison", 8); break;
765 case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
766 }
767 }
768 for (i = 0; i < MAX_BRANDS; i++)
769 if (strcmp(brandname[i], brand) == 0)
770 return brandname[i];
771 for (i = 0; i < MAX_BRANDS; i++)
772 if (brandname[i][0] == '\0')
773 return strcpy(brandname[i], brand);
774 if (overflow++ == 0)
775 printk(KERN_ERR
776 "%s: Table overflow. Some processor model information will be missing\n",
777 __func__);
778 return "Unknown";
779}
780
781static void
782identify_cpu (struct cpuinfo_ia64 *c)
783{
784 union {
785 unsigned long bits[5];
786 struct {
787 /* id 0 & 1: */
788 char vendor[16];
789
790 /* id 2 */
791 u64 ppn; /* processor serial number */
792
793 /* id 3: */
794 unsigned number : 8;
795 unsigned revision : 8;
796 unsigned model : 8;
797 unsigned family : 8;
798 unsigned archrev : 8;
799 unsigned reserved : 24;
800
801 /* id 4: */
802 u64 features;
803 } field;
804 } cpuid;
805 pal_vm_info_1_u_t vm1;
806 pal_vm_info_2_u_t vm2;
807 pal_status_t status;
808 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
809 int i;
810 for (i = 0; i < 5; ++i)
811 cpuid.bits[i] = ia64_get_cpuid(i);
812
813 memcpy(c->vendor, cpuid.field.vendor, 16);
814#ifdef CONFIG_SMP
815 c->cpu = smp_processor_id();
816
817 /* below default values will be overwritten by identify_siblings()
818 * for Multi-Threading/Multi-Core capable CPUs
819 */
820 c->threads_per_core = c->cores_per_socket = c->num_log = 1;
821 c->socket_id = -1;
822
823 identify_siblings(c);
824
825 if (c->threads_per_core > smp_num_siblings)
826 smp_num_siblings = c->threads_per_core;
827#endif
828 c->ppn = cpuid.field.ppn;
829 c->number = cpuid.field.number;
830 c->revision = cpuid.field.revision;
831 c->model = cpuid.field.model;
832 c->family = cpuid.field.family;
833 c->archrev = cpuid.field.archrev;
834 c->features = cpuid.field.features;
835 c->model_name = get_model_name(c->family, c->model);
836
837 status = ia64_pal_vm_summary(&vm1, &vm2);
838 if (status == PAL_STATUS_SUCCESS) {
839 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
840 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
841 }
842 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
843 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
844}
845
846/*
847 * Do the following calculations:
848 *
849 * 1. the max. cache line size.
850 * 2. the minimum of the i-cache stride sizes for "flush_icache_range()".
851 * 3. the minimum of the cache stride sizes for "clflush_cache_range()".
852 */
853static void
854get_cache_info(void)
855{
856 unsigned long line_size, max = 1;
857 unsigned long l, levels, unique_caches;
858 pal_cache_config_info_t cci;
859 long status;
860
861 status = ia64_pal_cache_summary(&levels, &unique_caches);
862 if (status != 0) {
863 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
864 __func__, status);
865 max = SMP_CACHE_BYTES;
866 /* Safest setup for "flush_icache_range()" */
867 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
868 /* Safest setup for "clflush_cache_range()" */
869 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
870 goto out;
871 }
872
873 for (l = 0; l < levels; ++l) {
874 /* cache_type (data_or_unified)=2 */
875 status = ia64_pal_cache_config_info(l, 2, &cci);
876 if (status != 0) {
877 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
878 "(l=%lu, 2) failed (status=%ld)\n",
879 __func__, l, status);
880 max = SMP_CACHE_BYTES;
881 /* The safest setup for "flush_icache_range()" */
882 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
883 /* The safest setup for "clflush_cache_range()" */
884 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
885 cci.pcci_unified = 1;
886 } else {
887 if (cci.pcci_stride < ia64_cache_stride_shift)
888 ia64_cache_stride_shift = cci.pcci_stride;
889
890 line_size = 1 << cci.pcci_line_size;
891 if (line_size > max)
892 max = line_size;
893 }
894
895 if (!cci.pcci_unified) {
896 /* cache_type (instruction)=1*/
897 status = ia64_pal_cache_config_info(l, 1, &cci);
898 if (status != 0) {
899 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
900 "(l=%lu, 1) failed (status=%ld)\n",
901 __func__, l, status);
902 /* The safest setup for flush_icache_range() */
903 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
904 }
905 }
906 if (cci.pcci_stride < ia64_i_cache_stride_shift)
907 ia64_i_cache_stride_shift = cci.pcci_stride;
908 }
909 out:
910 if (max > ia64_max_cacheline_size)
911 ia64_max_cacheline_size = max;
912}
913
914/*
915 * cpu_init() initializes state that is per-CPU. This function acts
916 * as a 'CPU state barrier', nothing should get across.
917 */
918void
919cpu_init (void)
920{
921 extern void ia64_mmu_init(void *);
922 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
923 unsigned long num_phys_stacked;
924 pal_vm_info_2_u_t vmi;
925 unsigned int max_ctx;
926 struct cpuinfo_ia64 *cpu_info;
927 void *cpu_data;
928
929 cpu_data = per_cpu_init();
930#ifdef CONFIG_SMP
931 /*
932 * insert boot cpu into sibling and core mapes
933 * (must be done after per_cpu area is setup)
934 */
935 if (smp_processor_id() == 0) {
936 cpumask_set_cpu(0, &per_cpu(cpu_sibling_map, 0));
937 cpumask_set_cpu(0, &cpu_core_map[0]);
938 } else {
939 /*
940 * Set ar.k3 so that assembly code in MCA handler can compute
941 * physical addresses of per cpu variables with a simple:
942 * phys = ar.k3 + &per_cpu_var
943 * and the alt-dtlb-miss handler can set per-cpu mapping into
944 * the TLB when needed. head.S already did this for cpu0.
945 */
946 ia64_set_kr(IA64_KR_PER_CPU_DATA,
947 ia64_tpa(cpu_data) - (long) __per_cpu_start);
948 }
949#endif
950
951 get_cache_info();
952
953 /*
954 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
955 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
956 * depends on the data returned by identify_cpu(). We break the dependency by
957 * accessing cpu_data() through the canonical per-CPU address.
958 */
959 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
960 identify_cpu(cpu_info);
961
962#ifdef CONFIG_MCKINLEY
963 {
964# define FEATURE_SET 16
965 struct ia64_pal_retval iprv;
966
967 if (cpu_info->family == 0x1f) {
968 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
969 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
970 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
971 (iprv.v1 | 0x80), FEATURE_SET, 0);
972 }
973 }
974#endif
975
976 /* Clear the stack memory reserved for pt_regs: */
977 memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
978
979 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
980
981 /*
982 * Initialize the page-table base register to a global
983 * directory with all zeroes. This ensure that we can handle
984 * TLB-misses to user address-space even before we created the
985 * first user address-space. This may happen, e.g., due to
986 * aggressive use of lfetch.fault.
987 */
988 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
989
990 /*
991 * Initialize default control register to defer speculative faults except
992 * for those arising from TLB misses, which are not deferred. The
993 * kernel MUST NOT depend on a particular setting of these bits (in other words,
994 * the kernel must have recovery code for all speculative accesses). Turn on
995 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
996 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
997 * be fine).
998 */
999 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
1000 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
1001 mmgrab(&init_mm);
1002 current->active_mm = &init_mm;
1003 BUG_ON(current->mm);
1004
1005 ia64_mmu_init(ia64_imva(cpu_data));
1006 ia64_mca_cpu_init(ia64_imva(cpu_data));
1007
1008 /* Clear ITC to eliminate sched_clock() overflows in human time. */
1009 ia64_set_itc(0);
1010
1011 /* disable all local interrupt sources: */
1012 ia64_set_itv(1 << 16);
1013 ia64_set_lrr0(1 << 16);
1014 ia64_set_lrr1(1 << 16);
1015 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
1016 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
1017
1018 /* clear TPR & XTP to enable all interrupt classes: */
1019 ia64_setreg(_IA64_REG_CR_TPR, 0);
1020
1021 /* Clear any pending interrupts left by SAL/EFI */
1022 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
1023 ia64_eoi();
1024
1025#ifdef CONFIG_SMP
1026 normal_xtp();
1027#endif
1028
1029 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
1030 if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
1031 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
1032 setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
1033 } else {
1034 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
1035 max_ctx = (1U << 15) - 1; /* use architected minimum */
1036 }
1037 while (max_ctx < ia64_ctx.max_ctx) {
1038 unsigned int old = ia64_ctx.max_ctx;
1039 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
1040 break;
1041 }
1042
1043 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
1044 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
1045 "stacked regs\n");
1046 num_phys_stacked = 96;
1047 }
1048 /* size of physical stacked register partition plus 8 bytes: */
1049 if (num_phys_stacked > max_num_phys_stacked) {
1050 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
1051 max_num_phys_stacked = num_phys_stacked;
1052 }
1053 platform_cpu_init();
1054}
1055
1056void __init
1057check_bugs (void)
1058{
1059 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1060 (unsigned long) __end___mckinley_e9_bundles);
1061}
1062
1063static int __init run_dmi_scan(void)
1064{
1065 dmi_scan_machine();
1066 dmi_memdev_walk();
1067 dmi_set_dump_stack_arch_desc();
1068 return 0;
1069}
1070core_initcall(run_dmi_scan);
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/machvec.h>
50#include <asm/mca.h>
51#include <asm/meminit.h>
52#include <asm/page.h>
53#include <asm/patch.h>
54#include <asm/pgtable.h>
55#include <asm/processor.h>
56#include <asm/sal.h>
57#include <asm/sections.h>
58#include <asm/setup.h>
59#include <asm/smp.h>
60#include <asm/tlbflush.h>
61#include <asm/unistd.h>
62#include <asm/hpsim.h>
63
64#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
65# error "struct cpuinfo_ia64 too big!"
66#endif
67
68#ifdef CONFIG_SMP
69unsigned long __per_cpu_offset[NR_CPUS];
70EXPORT_SYMBOL(__per_cpu_offset);
71#endif
72
73DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
74DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
75unsigned long ia64_cycles_per_usec;
76struct ia64_boot_param *ia64_boot_param;
77struct screen_info screen_info;
78unsigned long vga_console_iobase;
79unsigned long vga_console_membase;
80
81static struct resource data_resource = {
82 .name = "Kernel data",
83 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
84};
85
86static struct resource code_resource = {
87 .name = "Kernel code",
88 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
89};
90
91static struct resource bss_resource = {
92 .name = "Kernel bss",
93 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
94};
95
96unsigned long ia64_max_cacheline_size;
97
98unsigned long ia64_iobase; /* virtual address for I/O accesses */
99EXPORT_SYMBOL(ia64_iobase);
100struct io_space io_space[MAX_IO_SPACES];
101EXPORT_SYMBOL(io_space);
102unsigned int num_io_spaces;
103
104/*
105 * "flush_icache_range()" needs to know what processor dependent stride size to use
106 * when it makes i-cache(s) coherent with d-caches.
107 */
108#define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */
109unsigned long ia64_i_cache_stride_shift = ~0;
110/*
111 * "clflush_cache_range()" needs to know what processor dependent stride size to
112 * use when it flushes cache lines including both d-cache and i-cache.
113 */
114/* Safest way to go: 32 bytes by 32 bytes */
115#define CACHE_STRIDE_SHIFT 5
116unsigned long ia64_cache_stride_shift = ~0;
117
118/*
119 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This
120 * mask specifies a mask of address bits that must be 0 in order for two buffers to be
121 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
122 * address of the second buffer must be aligned to (merge_mask+1) in order to be
123 * mergeable). By default, we assume there is no I/O MMU which can merge physically
124 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
125 * page-size of 2^64.
126 */
127unsigned long ia64_max_iommu_merge_mask = ~0UL;
128EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
129
130/*
131 * We use a special marker for the end of memory and it uses the extra (+1) slot
132 */
133struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
134int 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 */
143int __init
144filter_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 */
183int __init
184filter_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
202static void __init
203sort_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 */
221static int __init
222merge_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 */
240static 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 * lib/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 "sn2".
268 */
269static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
270{
271 if (ia64_platform_is("sn2") || ia64_platform_is("uv"))
272 return 1;
273 else
274 return pbase < (1UL << 32);
275}
276
277static 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_warning("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
324static 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 */
335void __init
336reserve_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
392
393/**
394 * find_initrd - get initrd parameters from the boot parameter structure
395 *
396 * Grab the initrd start and end from the boot parameter struct given us by
397 * the boot loader.
398 */
399void __init
400find_initrd (void)
401{
402#ifdef CONFIG_BLK_DEV_INITRD
403 if (ia64_boot_param->initrd_start) {
404 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
405 initrd_end = initrd_start+ia64_boot_param->initrd_size;
406
407 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%llu bytes)\n",
408 initrd_start, ia64_boot_param->initrd_size);
409 }
410#endif
411}
412
413static void __init
414io_port_init (void)
415{
416 unsigned long phys_iobase;
417
418 /*
419 * Set `iobase' based on the EFI memory map or, failing that, the
420 * value firmware left in ar.k0.
421 *
422 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
423 * the port's virtual address, so ia32_load_state() loads it with a
424 * user virtual address. But in ia64 mode, glibc uses the
425 * *physical* address in ar.k0 to mmap the appropriate area from
426 * /dev/mem, and the inX()/outX() interfaces use MMIO. In both
427 * cases, user-mode can only use the legacy 0-64K I/O port space.
428 *
429 * ar.k0 is not involved in kernel I/O port accesses, which can use
430 * any of the I/O port spaces and are done via MMIO using the
431 * virtual mmio_base from the appropriate io_space[].
432 */
433 phys_iobase = efi_get_iobase();
434 if (!phys_iobase) {
435 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
436 printk(KERN_INFO "No I/O port range found in EFI memory map, "
437 "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
438 }
439 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
440 ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
441
442 /* setup legacy IO port space */
443 io_space[0].mmio_base = ia64_iobase;
444 io_space[0].sparse = 1;
445 num_io_spaces = 1;
446}
447
448/**
449 * early_console_setup - setup debugging console
450 *
451 * Consoles started here require little enough setup that we can start using
452 * them very early in the boot process, either right after the machine
453 * vector initialization, or even before if the drivers can detect their hw.
454 *
455 * Returns non-zero if a console couldn't be setup.
456 */
457static inline int __init
458early_console_setup (char *cmdline)
459{
460 int earlycons = 0;
461
462#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
463 {
464 extern int sn_serial_console_early_setup(void);
465 if (!sn_serial_console_early_setup())
466 earlycons++;
467 }
468#endif
469#ifdef CONFIG_EFI_PCDP
470 if (!efi_setup_pcdp_console(cmdline))
471 earlycons++;
472#endif
473 if (!simcons_register())
474 earlycons++;
475
476 return (earlycons) ? 0 : -1;
477}
478
479static inline void
480mark_bsp_online (void)
481{
482#ifdef CONFIG_SMP
483 /* If we register an early console, allow CPU 0 to printk */
484 set_cpu_online(smp_processor_id(), true);
485#endif
486}
487
488static __initdata int nomca;
489static __init int setup_nomca(char *s)
490{
491 nomca = 1;
492 return 0;
493}
494early_param("nomca", setup_nomca);
495
496#ifdef CONFIG_CRASH_DUMP
497int __init reserve_elfcorehdr(u64 *start, u64 *end)
498{
499 u64 length;
500
501 /* We get the address using the kernel command line,
502 * but the size is extracted from the EFI tables.
503 * Both address and size are required for reservation
504 * to work properly.
505 */
506
507 if (!is_vmcore_usable())
508 return -EINVAL;
509
510 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
511 vmcore_unusable();
512 return -EINVAL;
513 }
514
515 *start = (unsigned long)__va(elfcorehdr_addr);
516 *end = *start + length;
517 return 0;
518}
519
520#endif /* CONFIG_PROC_VMCORE */
521
522void __init
523setup_arch (char **cmdline_p)
524{
525 unw_init();
526
527 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
528
529 *cmdline_p = __va(ia64_boot_param->command_line);
530 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
531
532 efi_init();
533 io_port_init();
534
535#ifdef CONFIG_IA64_GENERIC
536 /* machvec needs to be parsed from the command line
537 * before parse_early_param() is called to ensure
538 * that ia64_mv is initialised before any command line
539 * settings may cause console setup to occur
540 */
541 machvec_init_from_cmdline(*cmdline_p);
542#endif
543
544 parse_early_param();
545
546 if (early_console_setup(*cmdline_p) == 0)
547 mark_bsp_online();
548
549#ifdef CONFIG_ACPI
550 /* Initialize the ACPI boot-time table parser */
551 acpi_table_init();
552 early_acpi_boot_init();
553# ifdef CONFIG_ACPI_NUMA
554 acpi_numa_init();
555# ifdef CONFIG_ACPI_HOTPLUG_CPU
556 prefill_possible_map();
557# endif
558 per_cpu_scan_finalize((cpumask_weight(&early_cpu_possible_map) == 0 ?
559 32 : cpumask_weight(&early_cpu_possible_map)),
560 additional_cpus > 0 ? additional_cpus : 0);
561# endif
562#endif /* CONFIG_APCI_BOOT */
563
564#ifdef CONFIG_SMP
565 smp_build_cpu_map();
566#endif
567 find_memory();
568
569 /* process SAL system table: */
570 ia64_sal_init(__va(efi.sal_systab));
571
572#ifdef CONFIG_ITANIUM
573 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
574#else
575 {
576 unsigned long num_phys_stacked;
577
578 if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
579 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
580 }
581#endif
582
583#ifdef CONFIG_SMP
584 cpu_physical_id(0) = hard_smp_processor_id();
585#endif
586
587 cpu_init(); /* initialize the bootstrap CPU */
588 mmu_context_init(); /* initialize context_id bitmap */
589
590#ifdef CONFIG_VT
591 if (!conswitchp) {
592# if defined(CONFIG_DUMMY_CONSOLE)
593 conswitchp = &dummy_con;
594# endif
595# if defined(CONFIG_VGA_CONSOLE)
596 /*
597 * Non-legacy systems may route legacy VGA MMIO range to system
598 * memory. vga_con probes the MMIO hole, so memory looks like
599 * a VGA device to it. The EFI memory map can tell us if it's
600 * memory so we can avoid this problem.
601 */
602 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
603 conswitchp = &vga_con;
604# endif
605 }
606#endif
607
608 /* enable IA-64 Machine Check Abort Handling unless disabled */
609 if (!nomca)
610 ia64_mca_init();
611
612 platform_setup(cmdline_p);
613#ifndef CONFIG_IA64_HP_SIM
614 check_sal_cache_flush();
615#endif
616 paging_init();
617}
618
619/*
620 * Display cpu info for all CPUs.
621 */
622static int
623show_cpuinfo (struct seq_file *m, void *v)
624{
625#ifdef CONFIG_SMP
626# define lpj c->loops_per_jiffy
627# define cpunum c->cpu
628#else
629# define lpj loops_per_jiffy
630# define cpunum 0
631#endif
632 static struct {
633 unsigned long mask;
634 const char *feature_name;
635 } feature_bits[] = {
636 { 1UL << 0, "branchlong" },
637 { 1UL << 1, "spontaneous deferral"},
638 { 1UL << 2, "16-byte atomic ops" }
639 };
640 char features[128], *cp, *sep;
641 struct cpuinfo_ia64 *c = v;
642 unsigned long mask;
643 unsigned long proc_freq;
644 int i, size;
645
646 mask = c->features;
647
648 /* build the feature string: */
649 memcpy(features, "standard", 9);
650 cp = features;
651 size = sizeof(features);
652 sep = "";
653 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
654 if (mask & feature_bits[i].mask) {
655 cp += snprintf(cp, size, "%s%s", sep,
656 feature_bits[i].feature_name),
657 sep = ", ";
658 mask &= ~feature_bits[i].mask;
659 size = sizeof(features) - (cp - features);
660 }
661 }
662 if (mask && size > 1) {
663 /* print unknown features as a hex value */
664 snprintf(cp, size, "%s0x%lx", sep, mask);
665 }
666
667 proc_freq = cpufreq_quick_get(cpunum);
668 if (!proc_freq)
669 proc_freq = c->proc_freq / 1000;
670
671 seq_printf(m,
672 "processor : %d\n"
673 "vendor : %s\n"
674 "arch : IA-64\n"
675 "family : %u\n"
676 "model : %u\n"
677 "model name : %s\n"
678 "revision : %u\n"
679 "archrev : %u\n"
680 "features : %s\n"
681 "cpu number : %lu\n"
682 "cpu regs : %u\n"
683 "cpu MHz : %lu.%03lu\n"
684 "itc MHz : %lu.%06lu\n"
685 "BogoMIPS : %lu.%02lu\n",
686 cpunum, c->vendor, c->family, c->model,
687 c->model_name, c->revision, c->archrev,
688 features, c->ppn, c->number,
689 proc_freq / 1000, proc_freq % 1000,
690 c->itc_freq / 1000000, c->itc_freq % 1000000,
691 lpj*HZ/500000, (lpj*HZ/5000) % 100);
692#ifdef CONFIG_SMP
693 seq_printf(m, "siblings : %u\n",
694 cpumask_weight(&cpu_core_map[cpunum]));
695 if (c->socket_id != -1)
696 seq_printf(m, "physical id: %u\n", c->socket_id);
697 if (c->threads_per_core > 1 || c->cores_per_socket > 1)
698 seq_printf(m,
699 "core id : %u\n"
700 "thread id : %u\n",
701 c->core_id, c->thread_id);
702#endif
703 seq_printf(m,"\n");
704
705 return 0;
706}
707
708static void *
709c_start (struct seq_file *m, loff_t *pos)
710{
711#ifdef CONFIG_SMP
712 while (*pos < nr_cpu_ids && !cpu_online(*pos))
713 ++*pos;
714#endif
715 return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL;
716}
717
718static void *
719c_next (struct seq_file *m, void *v, loff_t *pos)
720{
721 ++*pos;
722 return c_start(m, pos);
723}
724
725static void
726c_stop (struct seq_file *m, void *v)
727{
728}
729
730const struct seq_operations cpuinfo_op = {
731 .start = c_start,
732 .next = c_next,
733 .stop = c_stop,
734 .show = show_cpuinfo
735};
736
737#define MAX_BRANDS 8
738static char brandname[MAX_BRANDS][128];
739
740static char *
741get_model_name(__u8 family, __u8 model)
742{
743 static int overflow;
744 char brand[128];
745 int i;
746
747 memcpy(brand, "Unknown", 8);
748 if (ia64_pal_get_brand_info(brand)) {
749 if (family == 0x7)
750 memcpy(brand, "Merced", 7);
751 else if (family == 0x1f) switch (model) {
752 case 0: memcpy(brand, "McKinley", 9); break;
753 case 1: memcpy(brand, "Madison", 8); break;
754 case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
755 }
756 }
757 for (i = 0; i < MAX_BRANDS; i++)
758 if (strcmp(brandname[i], brand) == 0)
759 return brandname[i];
760 for (i = 0; i < MAX_BRANDS; i++)
761 if (brandname[i][0] == '\0')
762 return strcpy(brandname[i], brand);
763 if (overflow++ == 0)
764 printk(KERN_ERR
765 "%s: Table overflow. Some processor model information will be missing\n",
766 __func__);
767 return "Unknown";
768}
769
770static void
771identify_cpu (struct cpuinfo_ia64 *c)
772{
773 union {
774 unsigned long bits[5];
775 struct {
776 /* id 0 & 1: */
777 char vendor[16];
778
779 /* id 2 */
780 u64 ppn; /* processor serial number */
781
782 /* id 3: */
783 unsigned number : 8;
784 unsigned revision : 8;
785 unsigned model : 8;
786 unsigned family : 8;
787 unsigned archrev : 8;
788 unsigned reserved : 24;
789
790 /* id 4: */
791 u64 features;
792 } field;
793 } cpuid;
794 pal_vm_info_1_u_t vm1;
795 pal_vm_info_2_u_t vm2;
796 pal_status_t status;
797 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
798 int i;
799 for (i = 0; i < 5; ++i)
800 cpuid.bits[i] = ia64_get_cpuid(i);
801
802 memcpy(c->vendor, cpuid.field.vendor, 16);
803#ifdef CONFIG_SMP
804 c->cpu = smp_processor_id();
805
806 /* below default values will be overwritten by identify_siblings()
807 * for Multi-Threading/Multi-Core capable CPUs
808 */
809 c->threads_per_core = c->cores_per_socket = c->num_log = 1;
810 c->socket_id = -1;
811
812 identify_siblings(c);
813
814 if (c->threads_per_core > smp_num_siblings)
815 smp_num_siblings = c->threads_per_core;
816#endif
817 c->ppn = cpuid.field.ppn;
818 c->number = cpuid.field.number;
819 c->revision = cpuid.field.revision;
820 c->model = cpuid.field.model;
821 c->family = cpuid.field.family;
822 c->archrev = cpuid.field.archrev;
823 c->features = cpuid.field.features;
824 c->model_name = get_model_name(c->family, c->model);
825
826 status = ia64_pal_vm_summary(&vm1, &vm2);
827 if (status == PAL_STATUS_SUCCESS) {
828 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
829 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
830 }
831 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
832 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
833}
834
835/*
836 * Do the following calculations:
837 *
838 * 1. the max. cache line size.
839 * 2. the minimum of the i-cache stride sizes for "flush_icache_range()".
840 * 3. the minimum of the cache stride sizes for "clflush_cache_range()".
841 */
842static void
843get_cache_info(void)
844{
845 unsigned long line_size, max = 1;
846 unsigned long l, levels, unique_caches;
847 pal_cache_config_info_t cci;
848 long status;
849
850 status = ia64_pal_cache_summary(&levels, &unique_caches);
851 if (status != 0) {
852 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
853 __func__, status);
854 max = SMP_CACHE_BYTES;
855 /* Safest setup for "flush_icache_range()" */
856 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
857 /* Safest setup for "clflush_cache_range()" */
858 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
859 goto out;
860 }
861
862 for (l = 0; l < levels; ++l) {
863 /* cache_type (data_or_unified)=2 */
864 status = ia64_pal_cache_config_info(l, 2, &cci);
865 if (status != 0) {
866 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
867 "(l=%lu, 2) failed (status=%ld)\n",
868 __func__, l, status);
869 max = SMP_CACHE_BYTES;
870 /* The safest setup for "flush_icache_range()" */
871 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
872 /* The safest setup for "clflush_cache_range()" */
873 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
874 cci.pcci_unified = 1;
875 } else {
876 if (cci.pcci_stride < ia64_cache_stride_shift)
877 ia64_cache_stride_shift = cci.pcci_stride;
878
879 line_size = 1 << cci.pcci_line_size;
880 if (line_size > max)
881 max = line_size;
882 }
883
884 if (!cci.pcci_unified) {
885 /* cache_type (instruction)=1*/
886 status = ia64_pal_cache_config_info(l, 1, &cci);
887 if (status != 0) {
888 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
889 "(l=%lu, 1) failed (status=%ld)\n",
890 __func__, l, status);
891 /* The safest setup for flush_icache_range() */
892 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
893 }
894 }
895 if (cci.pcci_stride < ia64_i_cache_stride_shift)
896 ia64_i_cache_stride_shift = cci.pcci_stride;
897 }
898 out:
899 if (max > ia64_max_cacheline_size)
900 ia64_max_cacheline_size = max;
901}
902
903/*
904 * cpu_init() initializes state that is per-CPU. This function acts
905 * as a 'CPU state barrier', nothing should get across.
906 */
907void
908cpu_init (void)
909{
910 extern void ia64_mmu_init(void *);
911 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
912 unsigned long num_phys_stacked;
913 pal_vm_info_2_u_t vmi;
914 unsigned int max_ctx;
915 struct cpuinfo_ia64 *cpu_info;
916 void *cpu_data;
917
918 cpu_data = per_cpu_init();
919#ifdef CONFIG_SMP
920 /*
921 * insert boot cpu into sibling and core mapes
922 * (must be done after per_cpu area is setup)
923 */
924 if (smp_processor_id() == 0) {
925 cpumask_set_cpu(0, &per_cpu(cpu_sibling_map, 0));
926 cpumask_set_cpu(0, &cpu_core_map[0]);
927 } else {
928 /*
929 * Set ar.k3 so that assembly code in MCA handler can compute
930 * physical addresses of per cpu variables with a simple:
931 * phys = ar.k3 + &per_cpu_var
932 * and the alt-dtlb-miss handler can set per-cpu mapping into
933 * the TLB when needed. head.S already did this for cpu0.
934 */
935 ia64_set_kr(IA64_KR_PER_CPU_DATA,
936 ia64_tpa(cpu_data) - (long) __per_cpu_start);
937 }
938#endif
939
940 get_cache_info();
941
942 /*
943 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
944 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
945 * depends on the data returned by identify_cpu(). We break the dependency by
946 * accessing cpu_data() through the canonical per-CPU address.
947 */
948 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
949 identify_cpu(cpu_info);
950
951#ifdef CONFIG_MCKINLEY
952 {
953# define FEATURE_SET 16
954 struct ia64_pal_retval iprv;
955
956 if (cpu_info->family == 0x1f) {
957 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
958 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
959 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
960 (iprv.v1 | 0x80), FEATURE_SET, 0);
961 }
962 }
963#endif
964
965 /* Clear the stack memory reserved for pt_regs: */
966 memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
967
968 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
969
970 /*
971 * Initialize the page-table base register to a global
972 * directory with all zeroes. This ensure that we can handle
973 * TLB-misses to user address-space even before we created the
974 * first user address-space. This may happen, e.g., due to
975 * aggressive use of lfetch.fault.
976 */
977 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
978
979 /*
980 * Initialize default control register to defer speculative faults except
981 * for those arising from TLB misses, which are not deferred. The
982 * kernel MUST NOT depend on a particular setting of these bits (in other words,
983 * the kernel must have recovery code for all speculative accesses). Turn on
984 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
985 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
986 * be fine).
987 */
988 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
989 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
990 atomic_inc(&init_mm.mm_count);
991 current->active_mm = &init_mm;
992 BUG_ON(current->mm);
993
994 ia64_mmu_init(ia64_imva(cpu_data));
995 ia64_mca_cpu_init(ia64_imva(cpu_data));
996
997 /* Clear ITC to eliminate sched_clock() overflows in human time. */
998 ia64_set_itc(0);
999
1000 /* disable all local interrupt sources: */
1001 ia64_set_itv(1 << 16);
1002 ia64_set_lrr0(1 << 16);
1003 ia64_set_lrr1(1 << 16);
1004 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
1005 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
1006
1007 /* clear TPR & XTP to enable all interrupt classes: */
1008 ia64_setreg(_IA64_REG_CR_TPR, 0);
1009
1010 /* Clear any pending interrupts left by SAL/EFI */
1011 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
1012 ia64_eoi();
1013
1014#ifdef CONFIG_SMP
1015 normal_xtp();
1016#endif
1017
1018 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
1019 if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
1020 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
1021 setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
1022 } else {
1023 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
1024 max_ctx = (1U << 15) - 1; /* use architected minimum */
1025 }
1026 while (max_ctx < ia64_ctx.max_ctx) {
1027 unsigned int old = ia64_ctx.max_ctx;
1028 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
1029 break;
1030 }
1031
1032 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
1033 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
1034 "stacked regs\n");
1035 num_phys_stacked = 96;
1036 }
1037 /* size of physical stacked register partition plus 8 bytes: */
1038 if (num_phys_stacked > max_num_phys_stacked) {
1039 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
1040 max_num_phys_stacked = num_phys_stacked;
1041 }
1042 platform_cpu_init();
1043}
1044
1045void __init
1046check_bugs (void)
1047{
1048 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1049 (unsigned long) __end___mckinley_e9_bundles);
1050}
1051
1052static int __init run_dmi_scan(void)
1053{
1054 dmi_scan_machine();
1055 dmi_memdev_walk();
1056 dmi_set_dump_stack_arch_desc();
1057 return 0;
1058}
1059core_initcall(run_dmi_scan);