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 static 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
filter_rsvd_memory(u64 start,u64 end,void * arg)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
filter_memory(u64 start,u64 end,void * arg)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
sort_regions(struct rsvd_region * rsvd_region,int max)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 swap(rsvd_region[j], rsvd_region[j + 1]);
212 }
213 }
214 }
215 }
216
217 /* merge overlaps */
218 static int __init
merge_regions(struct rsvd_region * rsvd_region,int max)219 merge_regions (struct rsvd_region *rsvd_region, int max)
220 {
221 int i;
222 for (i = 1; i < max; ++i) {
223 if (rsvd_region[i].start >= rsvd_region[i-1].end)
224 continue;
225 if (rsvd_region[i].end > rsvd_region[i-1].end)
226 rsvd_region[i-1].end = rsvd_region[i].end;
227 --max;
228 memmove(&rsvd_region[i], &rsvd_region[i+1],
229 (max - i) * sizeof(struct rsvd_region));
230 }
231 return max;
232 }
233
234 /*
235 * Request address space for all standard resources
236 */
register_memory(void)237 static int __init register_memory(void)
238 {
239 code_resource.start = ia64_tpa(_text);
240 code_resource.end = ia64_tpa(_etext) - 1;
241 data_resource.start = ia64_tpa(_etext);
242 data_resource.end = ia64_tpa(_edata) - 1;
243 bss_resource.start = ia64_tpa(__bss_start);
244 bss_resource.end = ia64_tpa(_end) - 1;
245 efi_initialize_iomem_resources(&code_resource, &data_resource,
246 &bss_resource);
247
248 return 0;
249 }
250
251 __initcall(register_memory);
252
253
254 #ifdef CONFIG_KEXEC
255
256 /*
257 * This function checks if the reserved crashkernel is allowed on the specific
258 * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
259 * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
260 * kernel/dma/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
261 * in kdump case. See the comment in sba_init() in sba_iommu.c.
262 *
263 * So, the only machvec that really supports loading the kdump kernel
264 * over 4 GB is "uv".
265 */
check_crashkernel_memory(unsigned long pbase,size_t size)266 static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
267 {
268 if (is_uv_system())
269 return 1;
270 else
271 return pbase < (1UL << 32);
272 }
273
setup_crashkernel(unsigned long total,int * n)274 static void __init setup_crashkernel(unsigned long total, int *n)
275 {
276 unsigned long long base = 0, size = 0;
277 int ret;
278
279 ret = parse_crashkernel(boot_command_line, total,
280 &size, &base);
281 if (ret == 0 && size > 0) {
282 if (!base) {
283 sort_regions(rsvd_region, *n);
284 *n = merge_regions(rsvd_region, *n);
285 base = kdump_find_rsvd_region(size,
286 rsvd_region, *n);
287 }
288
289 if (!check_crashkernel_memory(base, size)) {
290 pr_warn("crashkernel: There would be kdump memory "
291 "at %ld GB but this is unusable because it "
292 "must\nbe below 4 GB. Change the memory "
293 "configuration of the machine.\n",
294 (unsigned long)(base >> 30));
295 return;
296 }
297
298 if (base != ~0UL) {
299 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
300 "for crashkernel (System RAM: %ldMB)\n",
301 (unsigned long)(size >> 20),
302 (unsigned long)(base >> 20),
303 (unsigned long)(total >> 20));
304 rsvd_region[*n].start =
305 (unsigned long)__va(base);
306 rsvd_region[*n].end =
307 (unsigned long)__va(base + size);
308 (*n)++;
309 crashk_res.start = base;
310 crashk_res.end = base + size - 1;
311 }
312 }
313 efi_memmap_res.start = ia64_boot_param->efi_memmap;
314 efi_memmap_res.end = efi_memmap_res.start +
315 ia64_boot_param->efi_memmap_size;
316 boot_param_res.start = __pa(ia64_boot_param);
317 boot_param_res.end = boot_param_res.start +
318 sizeof(*ia64_boot_param);
319 }
320 #else
setup_crashkernel(unsigned long total,int * n)321 static inline void __init setup_crashkernel(unsigned long total, int *n)
322 {}
323 #endif
324
325 #ifdef CONFIG_CRASH_DUMP
reserve_elfcorehdr(u64 * start,u64 * end)326 static int __init reserve_elfcorehdr(u64 *start, u64 *end)
327 {
328 u64 length;
329
330 /* We get the address using the kernel command line,
331 * but the size is extracted from the EFI tables.
332 * Both address and size are required for reservation
333 * to work properly.
334 */
335
336 if (!is_vmcore_usable())
337 return -EINVAL;
338
339 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
340 vmcore_unusable();
341 return -EINVAL;
342 }
343
344 *start = (unsigned long)__va(elfcorehdr_addr);
345 *end = *start + length;
346 return 0;
347 }
348 #endif /* CONFIG_CRASH_DUMP */
349
350 /**
351 * reserve_memory - setup reserved memory areas
352 *
353 * Setup the reserved memory areas set aside for the boot parameters,
354 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
355 * see arch/ia64/include/asm/meminit.h if you need to define more.
356 */
357 void __init
reserve_memory(void)358 reserve_memory (void)
359 {
360 int n = 0;
361 unsigned long total_memory;
362
363 /*
364 * none of the entries in this table overlap
365 */
366 rsvd_region[n].start = (unsigned long) ia64_boot_param;
367 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
368 n++;
369
370 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
371 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
372 n++;
373
374 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
375 rsvd_region[n].end = (rsvd_region[n].start
376 + strlen(__va(ia64_boot_param->command_line)) + 1);
377 n++;
378
379 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
380 rsvd_region[n].end = (unsigned long) ia64_imva(_end);
381 n++;
382
383 #ifdef CONFIG_BLK_DEV_INITRD
384 if (ia64_boot_param->initrd_start) {
385 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
386 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
387 n++;
388 }
389 #endif
390
391 #ifdef CONFIG_CRASH_DUMP
392 if (reserve_elfcorehdr(&rsvd_region[n].start,
393 &rsvd_region[n].end) == 0)
394 n++;
395 #endif
396
397 total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
398 n++;
399
400 setup_crashkernel(total_memory, &n);
401
402 /* end of memory marker */
403 rsvd_region[n].start = ~0UL;
404 rsvd_region[n].end = ~0UL;
405 n++;
406
407 num_rsvd_regions = n;
408 BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
409
410 sort_regions(rsvd_region, num_rsvd_regions);
411 num_rsvd_regions = merge_regions(rsvd_region, num_rsvd_regions);
412
413 /* reserve all regions except the end of memory marker with memblock */
414 for (n = 0; n < num_rsvd_regions - 1; n++) {
415 struct rsvd_region *region = &rsvd_region[n];
416 phys_addr_t addr = __pa(region->start);
417 phys_addr_t size = region->end - region->start;
418
419 memblock_reserve(addr, size);
420 }
421 }
422
423 /**
424 * find_initrd - get initrd parameters from the boot parameter structure
425 *
426 * Grab the initrd start and end from the boot parameter struct given us by
427 * the boot loader.
428 */
429 void __init
find_initrd(void)430 find_initrd (void)
431 {
432 #ifdef CONFIG_BLK_DEV_INITRD
433 if (ia64_boot_param->initrd_start) {
434 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
435 initrd_end = initrd_start+ia64_boot_param->initrd_size;
436
437 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%llu bytes)\n",
438 initrd_start, ia64_boot_param->initrd_size);
439 }
440 #endif
441 }
442
443 static void __init
io_port_init(void)444 io_port_init (void)
445 {
446 unsigned long phys_iobase;
447
448 /*
449 * Set `iobase' based on the EFI memory map or, failing that, the
450 * value firmware left in ar.k0.
451 *
452 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
453 * the port's virtual address, so ia32_load_state() loads it with a
454 * user virtual address. But in ia64 mode, glibc uses the
455 * *physical* address in ar.k0 to mmap the appropriate area from
456 * /dev/mem, and the inX()/outX() interfaces use MMIO. In both
457 * cases, user-mode can only use the legacy 0-64K I/O port space.
458 *
459 * ar.k0 is not involved in kernel I/O port accesses, which can use
460 * any of the I/O port spaces and are done via MMIO using the
461 * virtual mmio_base from the appropriate io_space[].
462 */
463 phys_iobase = efi_get_iobase();
464 if (!phys_iobase) {
465 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
466 printk(KERN_INFO "No I/O port range found in EFI memory map, "
467 "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
468 }
469 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
470 ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
471
472 /* setup legacy IO port space */
473 io_space[0].mmio_base = ia64_iobase;
474 io_space[0].sparse = 1;
475 num_io_spaces = 1;
476 }
477
478 /**
479 * early_console_setup - setup debugging console
480 *
481 * Consoles started here require little enough setup that we can start using
482 * them very early in the boot process, either right after the machine
483 * vector initialization, or even before if the drivers can detect their hw.
484 *
485 * Returns non-zero if a console couldn't be setup.
486 */
487 static inline int __init
early_console_setup(char * cmdline)488 early_console_setup (char *cmdline)
489 {
490 #ifdef CONFIG_EFI_PCDP
491 if (!efi_setup_pcdp_console(cmdline))
492 return 0;
493 #endif
494 return -1;
495 }
496
497 static void __init
screen_info_setup(void)498 screen_info_setup(void)
499 {
500 unsigned int orig_x, orig_y, num_cols, num_rows, font_height;
501
502 memset(&screen_info, 0, sizeof(screen_info));
503
504 if (!ia64_boot_param->console_info.num_rows ||
505 !ia64_boot_param->console_info.num_cols) {
506 printk(KERN_WARNING "invalid screen-info, guessing 80x25\n");
507 orig_x = 0;
508 orig_y = 0;
509 num_cols = 80;
510 num_rows = 25;
511 font_height = 16;
512 } else {
513 orig_x = ia64_boot_param->console_info.orig_x;
514 orig_y = ia64_boot_param->console_info.orig_y;
515 num_cols = ia64_boot_param->console_info.num_cols;
516 num_rows = ia64_boot_param->console_info.num_rows;
517 font_height = 400 / num_rows;
518 }
519
520 screen_info.orig_x = orig_x;
521 screen_info.orig_y = orig_y;
522 screen_info.orig_video_cols = num_cols;
523 screen_info.orig_video_lines = num_rows;
524 screen_info.orig_video_points = font_height;
525 screen_info.orig_video_mode = 3; /* XXX fake */
526 screen_info.orig_video_isVGA = 1; /* XXX fake */
527 screen_info.orig_video_ega_bx = 3; /* XXX fake */
528 }
529
530 static inline void
mark_bsp_online(void)531 mark_bsp_online (void)
532 {
533 #ifdef CONFIG_SMP
534 /* If we register an early console, allow CPU 0 to printk */
535 set_cpu_online(smp_processor_id(), true);
536 #endif
537 }
538
539 static __initdata int nomca;
setup_nomca(char * s)540 static __init int setup_nomca(char *s)
541 {
542 nomca = 1;
543 return 0;
544 }
545 early_param("nomca", setup_nomca);
546
547 void __init
setup_arch(char ** cmdline_p)548 setup_arch (char **cmdline_p)
549 {
550 unw_init();
551
552 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
553
554 *cmdline_p = __va(ia64_boot_param->command_line);
555 strscpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
556
557 efi_init();
558 io_port_init();
559
560 uv_probe_system_type();
561 parse_early_param();
562
563 if (early_console_setup(*cmdline_p) == 0)
564 mark_bsp_online();
565
566 /* Initialize the ACPI boot-time table parser */
567 acpi_table_init();
568 early_acpi_boot_init();
569 #ifdef CONFIG_ACPI_NUMA
570 acpi_numa_init();
571 acpi_numa_fixup();
572 #ifdef CONFIG_ACPI_HOTPLUG_CPU
573 prefill_possible_map();
574 #endif
575 per_cpu_scan_finalize((cpumask_empty(&early_cpu_possible_map) ?
576 32 : cpumask_weight(&early_cpu_possible_map)),
577 additional_cpus > 0 ? additional_cpus : 0);
578 #endif /* CONFIG_ACPI_NUMA */
579
580 #ifdef CONFIG_SMP
581 smp_build_cpu_map();
582 #endif
583 find_memory();
584
585 /* process SAL system table: */
586 ia64_sal_init(__va(sal_systab_phys));
587
588 #ifdef CONFIG_ITANIUM
589 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
590 #else
591 {
592 unsigned long num_phys_stacked;
593
594 if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
595 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
596 }
597 #endif
598
599 #ifdef CONFIG_SMP
600 cpu_physical_id(0) = hard_smp_processor_id();
601 #endif
602
603 cpu_init(); /* initialize the bootstrap CPU */
604 mmu_context_init(); /* initialize context_id bitmap */
605
606 #ifdef CONFIG_VT
607 if (!conswitchp) {
608 # if defined(CONFIG_VGA_CONSOLE)
609 /*
610 * Non-legacy systems may route legacy VGA MMIO range to system
611 * memory. vga_con probes the MMIO hole, so memory looks like
612 * a VGA device to it. The EFI memory map can tell us if it's
613 * memory so we can avoid this problem.
614 */
615 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
616 conswitchp = &vga_con;
617 # endif
618 }
619 #endif
620
621 /* enable IA-64 Machine Check Abort Handling unless disabled */
622 if (!nomca)
623 ia64_mca_init();
624
625 /*
626 * Default to /dev/sda2. This assumes that the EFI partition
627 * is physical disk 1 partition 1 and the Linux root disk is
628 * physical disk 1 partition 2.
629 */
630 ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 2);
631
632 if (is_uv_system())
633 uv_setup(cmdline_p);
634 #ifdef CONFIG_SMP
635 else
636 init_smp_config();
637 #endif
638
639 screen_info_setup();
640 paging_init();
641
642 clear_sched_clock_stable();
643 }
644
645 /*
646 * Display cpu info for all CPUs.
647 */
648 static int
show_cpuinfo(struct seq_file * m,void * v)649 show_cpuinfo (struct seq_file *m, void *v)
650 {
651 #ifdef CONFIG_SMP
652 # define lpj c->loops_per_jiffy
653 # define cpunum c->cpu
654 #else
655 # define lpj loops_per_jiffy
656 # define cpunum 0
657 #endif
658 static struct {
659 unsigned long mask;
660 const char *feature_name;
661 } feature_bits[] = {
662 { 1UL << 0, "branchlong" },
663 { 1UL << 1, "spontaneous deferral"},
664 { 1UL << 2, "16-byte atomic ops" }
665 };
666 char features[128], *cp, *sep;
667 struct cpuinfo_ia64 *c = v;
668 unsigned long mask;
669 unsigned long proc_freq;
670 int i, size;
671
672 mask = c->features;
673
674 /* build the feature string: */
675 memcpy(features, "standard", 9);
676 cp = features;
677 size = sizeof(features);
678 sep = "";
679 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
680 if (mask & feature_bits[i].mask) {
681 cp += snprintf(cp, size, "%s%s", sep,
682 feature_bits[i].feature_name),
683 sep = ", ";
684 mask &= ~feature_bits[i].mask;
685 size = sizeof(features) - (cp - features);
686 }
687 }
688 if (mask && size > 1) {
689 /* print unknown features as a hex value */
690 snprintf(cp, size, "%s0x%lx", sep, mask);
691 }
692
693 proc_freq = cpufreq_quick_get(cpunum);
694 if (!proc_freq)
695 proc_freq = c->proc_freq / 1000;
696
697 seq_printf(m,
698 "processor : %d\n"
699 "vendor : %s\n"
700 "arch : IA-64\n"
701 "family : %u\n"
702 "model : %u\n"
703 "model name : %s\n"
704 "revision : %u\n"
705 "archrev : %u\n"
706 "features : %s\n"
707 "cpu number : %lu\n"
708 "cpu regs : %u\n"
709 "cpu MHz : %lu.%03lu\n"
710 "itc MHz : %lu.%06lu\n"
711 "BogoMIPS : %lu.%02lu\n",
712 cpunum, c->vendor, c->family, c->model,
713 c->model_name, c->revision, c->archrev,
714 features, c->ppn, c->number,
715 proc_freq / 1000, proc_freq % 1000,
716 c->itc_freq / 1000000, c->itc_freq % 1000000,
717 lpj*HZ/500000, (lpj*HZ/5000) % 100);
718 #ifdef CONFIG_SMP
719 seq_printf(m, "siblings : %u\n",
720 cpumask_weight(&cpu_core_map[cpunum]));
721 if (c->socket_id != -1)
722 seq_printf(m, "physical id: %u\n", c->socket_id);
723 if (c->threads_per_core > 1 || c->cores_per_socket > 1)
724 seq_printf(m,
725 "core id : %u\n"
726 "thread id : %u\n",
727 c->core_id, c->thread_id);
728 #endif
729 seq_printf(m,"\n");
730
731 return 0;
732 }
733
734 static void *
c_start(struct seq_file * m,loff_t * pos)735 c_start (struct seq_file *m, loff_t *pos)
736 {
737 #ifdef CONFIG_SMP
738 while (*pos < nr_cpu_ids && !cpu_online(*pos))
739 ++*pos;
740 #endif
741 return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL;
742 }
743
744 static void *
c_next(struct seq_file * m,void * v,loff_t * pos)745 c_next (struct seq_file *m, void *v, loff_t *pos)
746 {
747 ++*pos;
748 return c_start(m, pos);
749 }
750
751 static void
c_stop(struct seq_file * m,void * v)752 c_stop (struct seq_file *m, void *v)
753 {
754 }
755
756 const struct seq_operations cpuinfo_op = {
757 .start = c_start,
758 .next = c_next,
759 .stop = c_stop,
760 .show = show_cpuinfo
761 };
762
763 #define MAX_BRANDS 8
764 static char brandname[MAX_BRANDS][128];
765
766 static char *
get_model_name(__u8 family,__u8 model)767 get_model_name(__u8 family, __u8 model)
768 {
769 static int overflow;
770 char brand[128];
771 int i;
772
773 memcpy(brand, "Unknown", 8);
774 if (ia64_pal_get_brand_info(brand)) {
775 if (family == 0x7)
776 memcpy(brand, "Merced", 7);
777 else if (family == 0x1f) switch (model) {
778 case 0: memcpy(brand, "McKinley", 9); break;
779 case 1: memcpy(brand, "Madison", 8); break;
780 case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
781 }
782 }
783 for (i = 0; i < MAX_BRANDS; i++)
784 if (strcmp(brandname[i], brand) == 0)
785 return brandname[i];
786 for (i = 0; i < MAX_BRANDS; i++)
787 if (brandname[i][0] == '\0')
788 return strcpy(brandname[i], brand);
789 if (overflow++ == 0)
790 printk(KERN_ERR
791 "%s: Table overflow. Some processor model information will be missing\n",
792 __func__);
793 return "Unknown";
794 }
795
796 static void
identify_cpu(struct cpuinfo_ia64 * c)797 identify_cpu (struct cpuinfo_ia64 *c)
798 {
799 union {
800 unsigned long bits[5];
801 struct {
802 /* id 0 & 1: */
803 char vendor[16];
804
805 /* id 2 */
806 u64 ppn; /* processor serial number */
807
808 /* id 3: */
809 unsigned number : 8;
810 unsigned revision : 8;
811 unsigned model : 8;
812 unsigned family : 8;
813 unsigned archrev : 8;
814 unsigned reserved : 24;
815
816 /* id 4: */
817 u64 features;
818 } field;
819 } cpuid;
820 pal_vm_info_1_u_t vm1;
821 pal_vm_info_2_u_t vm2;
822 pal_status_t status;
823 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
824 int i;
825 for (i = 0; i < 5; ++i)
826 cpuid.bits[i] = ia64_get_cpuid(i);
827
828 memcpy(c->vendor, cpuid.field.vendor, 16);
829 #ifdef CONFIG_SMP
830 c->cpu = smp_processor_id();
831
832 /* below default values will be overwritten by identify_siblings()
833 * for Multi-Threading/Multi-Core capable CPUs
834 */
835 c->threads_per_core = c->cores_per_socket = c->num_log = 1;
836 c->socket_id = -1;
837
838 identify_siblings(c);
839
840 if (c->threads_per_core > smp_num_siblings)
841 smp_num_siblings = c->threads_per_core;
842 #endif
843 c->ppn = cpuid.field.ppn;
844 c->number = cpuid.field.number;
845 c->revision = cpuid.field.revision;
846 c->model = cpuid.field.model;
847 c->family = cpuid.field.family;
848 c->archrev = cpuid.field.archrev;
849 c->features = cpuid.field.features;
850 c->model_name = get_model_name(c->family, c->model);
851
852 status = ia64_pal_vm_summary(&vm1, &vm2);
853 if (status == PAL_STATUS_SUCCESS) {
854 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
855 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
856 }
857 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
858 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
859 }
860
861 /*
862 * Do the following calculations:
863 *
864 * 1. the max. cache line size.
865 * 2. the minimum of the i-cache stride sizes for "flush_icache_range()".
866 * 3. the minimum of the cache stride sizes for "clflush_cache_range()".
867 */
868 static void
get_cache_info(void)869 get_cache_info(void)
870 {
871 unsigned long line_size, max = 1;
872 unsigned long l, levels, unique_caches;
873 pal_cache_config_info_t cci;
874 long status;
875
876 status = ia64_pal_cache_summary(&levels, &unique_caches);
877 if (status != 0) {
878 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
879 __func__, status);
880 max = SMP_CACHE_BYTES;
881 /* Safest setup for "flush_icache_range()" */
882 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
883 /* Safest setup for "clflush_cache_range()" */
884 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
885 goto out;
886 }
887
888 for (l = 0; l < levels; ++l) {
889 /* cache_type (data_or_unified)=2 */
890 status = ia64_pal_cache_config_info(l, 2, &cci);
891 if (status != 0) {
892 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
893 "(l=%lu, 2) failed (status=%ld)\n",
894 __func__, l, status);
895 max = SMP_CACHE_BYTES;
896 /* The safest setup for "flush_icache_range()" */
897 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
898 /* The safest setup for "clflush_cache_range()" */
899 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
900 cci.pcci_unified = 1;
901 } else {
902 if (cci.pcci_stride < ia64_cache_stride_shift)
903 ia64_cache_stride_shift = cci.pcci_stride;
904
905 line_size = 1 << cci.pcci_line_size;
906 if (line_size > max)
907 max = line_size;
908 }
909
910 if (!cci.pcci_unified) {
911 /* cache_type (instruction)=1*/
912 status = ia64_pal_cache_config_info(l, 1, &cci);
913 if (status != 0) {
914 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
915 "(l=%lu, 1) failed (status=%ld)\n",
916 __func__, l, status);
917 /* The safest setup for flush_icache_range() */
918 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
919 }
920 }
921 if (cci.pcci_stride < ia64_i_cache_stride_shift)
922 ia64_i_cache_stride_shift = cci.pcci_stride;
923 }
924 out:
925 if (max > ia64_max_cacheline_size)
926 ia64_max_cacheline_size = max;
927 }
928
929 /*
930 * cpu_init() initializes state that is per-CPU. This function acts
931 * as a 'CPU state barrier', nothing should get across.
932 */
933 void
cpu_init(void)934 cpu_init (void)
935 {
936 extern void ia64_mmu_init(void *);
937 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
938 unsigned long num_phys_stacked;
939 pal_vm_info_2_u_t vmi;
940 unsigned int max_ctx;
941 struct cpuinfo_ia64 *cpu_info;
942 void *cpu_data;
943
944 cpu_data = per_cpu_init();
945 #ifdef CONFIG_SMP
946 /*
947 * insert boot cpu into sibling and core mapes
948 * (must be done after per_cpu area is setup)
949 */
950 if (smp_processor_id() == 0) {
951 cpumask_set_cpu(0, &per_cpu(cpu_sibling_map, 0));
952 cpumask_set_cpu(0, &cpu_core_map[0]);
953 } else {
954 /*
955 * Set ar.k3 so that assembly code in MCA handler can compute
956 * physical addresses of per cpu variables with a simple:
957 * phys = ar.k3 + &per_cpu_var
958 * and the alt-dtlb-miss handler can set per-cpu mapping into
959 * the TLB when needed. head.S already did this for cpu0.
960 */
961 ia64_set_kr(IA64_KR_PER_CPU_DATA,
962 ia64_tpa(cpu_data) - (long) __per_cpu_start);
963 }
964 #endif
965
966 get_cache_info();
967
968 /*
969 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
970 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
971 * depends on the data returned by identify_cpu(). We break the dependency by
972 * accessing cpu_data() through the canonical per-CPU address.
973 */
974 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
975 identify_cpu(cpu_info);
976
977 #ifdef CONFIG_MCKINLEY
978 {
979 # define FEATURE_SET 16
980 struct ia64_pal_retval iprv;
981
982 if (cpu_info->family == 0x1f) {
983 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
984 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
985 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
986 (iprv.v1 | 0x80), FEATURE_SET, 0);
987 }
988 }
989 #endif
990
991 /* Clear the stack memory reserved for pt_regs: */
992 memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
993
994 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
995
996 /*
997 * Initialize the page-table base register to a global
998 * directory with all zeroes. This ensure that we can handle
999 * TLB-misses to user address-space even before we created the
1000 * first user address-space. This may happen, e.g., due to
1001 * aggressive use of lfetch.fault.
1002 */
1003 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
1004
1005 /*
1006 * Initialize default control register to defer speculative faults except
1007 * for those arising from TLB misses, which are not deferred. The
1008 * kernel MUST NOT depend on a particular setting of these bits (in other words,
1009 * the kernel must have recovery code for all speculative accesses). Turn on
1010 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
1011 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
1012 * be fine).
1013 */
1014 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
1015 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
1016 mmgrab(&init_mm);
1017 current->active_mm = &init_mm;
1018 BUG_ON(current->mm);
1019
1020 ia64_mmu_init(ia64_imva(cpu_data));
1021 ia64_mca_cpu_init(ia64_imva(cpu_data));
1022
1023 /* Clear ITC to eliminate sched_clock() overflows in human time. */
1024 ia64_set_itc(0);
1025
1026 /* disable all local interrupt sources: */
1027 ia64_set_itv(1 << 16);
1028 ia64_set_lrr0(1 << 16);
1029 ia64_set_lrr1(1 << 16);
1030 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
1031 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
1032
1033 /* clear TPR & XTP to enable all interrupt classes: */
1034 ia64_setreg(_IA64_REG_CR_TPR, 0);
1035
1036 /* Clear any pending interrupts left by SAL/EFI */
1037 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
1038 ia64_eoi();
1039
1040 #ifdef CONFIG_SMP
1041 normal_xtp();
1042 #endif
1043
1044 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
1045 if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
1046 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
1047 setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
1048 } else {
1049 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
1050 max_ctx = (1U << 15) - 1; /* use architected minimum */
1051 }
1052 while (max_ctx < ia64_ctx.max_ctx) {
1053 unsigned int old = ia64_ctx.max_ctx;
1054 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
1055 break;
1056 }
1057
1058 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
1059 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
1060 "stacked regs\n");
1061 num_phys_stacked = 96;
1062 }
1063 /* size of physical stacked register partition plus 8 bytes: */
1064 if (num_phys_stacked > max_num_phys_stacked) {
1065 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
1066 max_num_phys_stacked = num_phys_stacked;
1067 }
1068 }
1069
arch_cpu_finalize_init(void)1070 void __init arch_cpu_finalize_init(void)
1071 {
1072 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1073 (unsigned long) __end___mckinley_e9_bundles);
1074 }
1075
run_dmi_scan(void)1076 static int __init run_dmi_scan(void)
1077 {
1078 dmi_setup();
1079 return 0;
1080 }
1081 core_initcall(run_dmi_scan);
1082