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Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86 / kernel / setup.c
1 /*
2 * Copyright (C) 1995 Linus Torvalds
3 *
4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
5 *
6 * Memory region support
7 * David Parsons <orc@pell.chi.il.us>, July-August 1999
8 *
9 * Added E820 sanitization routine (removes overlapping memory regions);
10 * Brian Moyle <bmoyle@mvista.com>, February 2001
11 *
12 * Moved CPU detection code to cpu/${cpu}.c
13 * Patrick Mochel <mochel@osdl.org>, March 2002
14 *
15 * Provisions for empty E820 memory regions (reported by certain BIOSes).
16 * Alex Achenbach <xela@slit.de>, December 2002.
17 *
18 */
19
20 /*
21 * This file handles the architecture-dependent parts of initialization
22 */
23
24 #include <linux/sched.h>
25 #include <linux/mm.h>
26 #include <linux/mmzone.h>
27 #include <linux/screen_info.h>
28 #include <linux/ioport.h>
29 #include <linux/acpi.h>
30 #include <linux/sfi.h>
31 #include <linux/apm_bios.h>
32 #include <linux/initrd.h>
33 #include <linux/bootmem.h>
34 #include <linux/memblock.h>
35 #include <linux/seq_file.h>
36 #include <linux/console.h>
37 #include <linux/root_dev.h>
38 #include <linux/highmem.h>
39 #include <linux/module.h>
40 #include <linux/efi.h>
41 #include <linux/init.h>
42 #include <linux/edd.h>
43 #include <linux/iscsi_ibft.h>
44 #include <linux/nodemask.h>
45 #include <linux/kexec.h>
46 #include <linux/dmi.h>
47 #include <linux/pfn.h>
48 #include <linux/pci.h>
49 #include <asm/pci-direct.h>
50 #include <linux/init_ohci1394_dma.h>
51 #include <linux/kvm_para.h>
52 #include <linux/dma-contiguous.h>
53
54 #include <linux/errno.h>
55 #include <linux/kernel.h>
56 #include <linux/stddef.h>
57 #include <linux/unistd.h>
58 #include <linux/ptrace.h>
59 #include <linux/user.h>
60 #include <linux/delay.h>
61
62 #include <linux/kallsyms.h>
63 #include <linux/cpufreq.h>
64 #include <linux/dma-mapping.h>
65 #include <linux/ctype.h>
66 #include <linux/uaccess.h>
67
68 #include <linux/percpu.h>
69 #include <linux/crash_dump.h>
70 #include <linux/tboot.h>
71 #include <linux/jiffies.h>
72
73 #include <video/edid.h>
74
75 #include <asm/mtrr.h>
76 #include <asm/apic.h>
77 #include <asm/realmode.h>
78 #include <asm/e820.h>
79 #include <asm/mpspec.h>
80 #include <asm/setup.h>
81 #include <asm/efi.h>
82 #include <asm/timer.h>
83 #include <asm/i8259.h>
84 #include <asm/sections.h>
85 #include <asm/dmi.h>
86 #include <asm/io_apic.h>
87 #include <asm/ist.h>
88 #include <asm/setup_arch.h>
89 #include <asm/bios_ebda.h>
90 #include <asm/cacheflush.h>
91 #include <asm/processor.h>
92 #include <asm/bugs.h>
93
94 #include <asm/vsyscall.h>
95 #include <asm/cpu.h>
96 #include <asm/desc.h>
97 #include <asm/dma.h>
98 #include <asm/iommu.h>
99 #include <asm/gart.h>
100 #include <asm/mmu_context.h>
101 #include <asm/proto.h>
102
103 #include <asm/paravirt.h>
104 #include <asm/hypervisor.h>
105 #include <asm/olpc_ofw.h>
106
107 #include <asm/percpu.h>
108 #include <asm/topology.h>
109 #include <asm/apicdef.h>
110 #include <asm/amd_nb.h>
111 #include <asm/mce.h>
112 #include <asm/alternative.h>
113 #include <asm/prom.h>
114
115 /*
116 * max_low_pfn_mapped: highest direct mapped pfn under 4GB
117 * max_pfn_mapped: highest direct mapped pfn over 4GB
118 *
119 * The direct mapping only covers E820_RAM regions, so the ranges and gaps are
120 * represented by pfn_mapped
121 */
122 unsigned long max_low_pfn_mapped;
123 unsigned long max_pfn_mapped;
124
125 #ifdef CONFIG_DMI
126 RESERVE_BRK(dmi_alloc, 65536);
127 #endif
128
129
130 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
131 unsigned long _brk_end = (unsigned long)__brk_base;
132
133 #ifdef CONFIG_X86_64
134 int default_cpu_present_to_apicid(int mps_cpu)
135 {
136 return __default_cpu_present_to_apicid(mps_cpu);
137 }
138
139 int default_check_phys_apicid_present(int phys_apicid)
140 {
141 return __default_check_phys_apicid_present(phys_apicid);
142 }
143 #endif
144
145 struct boot_params boot_params;
146
147 /*
148 * Machine setup..
149 */
150 static struct resource data_resource = {
151 .name = "Kernel data",
152 .start = 0,
153 .end = 0,
154 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
155 };
156
157 static struct resource code_resource = {
158 .name = "Kernel code",
159 .start = 0,
160 .end = 0,
161 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
162 };
163
164 static struct resource bss_resource = {
165 .name = "Kernel bss",
166 .start = 0,
167 .end = 0,
168 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
169 };
170
171
172 #ifdef CONFIG_X86_32
173 /* cpu data as detected by the assembly code in head.S */
174 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {
175 .wp_works_ok = -1,
176 };
177 /* common cpu data for all cpus */
178 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
179 .wp_works_ok = -1,
180 };
181 EXPORT_SYMBOL(boot_cpu_data);
182
183 unsigned int def_to_bigsmp;
184
185 /* for MCA, but anyone else can use it if they want */
186 unsigned int machine_id;
187 unsigned int machine_submodel_id;
188 unsigned int BIOS_revision;
189
190 struct apm_info apm_info;
191 EXPORT_SYMBOL(apm_info);
192
193 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
194 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
195 struct ist_info ist_info;
196 EXPORT_SYMBOL(ist_info);
197 #else
198 struct ist_info ist_info;
199 #endif
200
201 #else
202 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
203 .x86_phys_bits = MAX_PHYSMEM_BITS,
204 };
205 EXPORT_SYMBOL(boot_cpu_data);
206 #endif
207
208
209 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
210 unsigned long mmu_cr4_features;
211 #else
212 unsigned long mmu_cr4_features = X86_CR4_PAE;
213 #endif
214
215 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
216 int bootloader_type, bootloader_version;
217
218 /*
219 * Setup options
220 */
221 struct screen_info screen_info;
222 EXPORT_SYMBOL(screen_info);
223 struct edid_info edid_info;
224 EXPORT_SYMBOL_GPL(edid_info);
225
226 extern int root_mountflags;
227
228 unsigned long saved_video_mode;
229
230 #define RAMDISK_IMAGE_START_MASK 0x07FF
231 #define RAMDISK_PROMPT_FLAG 0x8000
232 #define RAMDISK_LOAD_FLAG 0x4000
233
234 static char __initdata command_line[COMMAND_LINE_SIZE];
235 #ifdef CONFIG_CMDLINE_BOOL
236 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
237 #endif
238
239 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
240 struct edd edd;
241 #ifdef CONFIG_EDD_MODULE
242 EXPORT_SYMBOL(edd);
243 #endif
244 /**
245 * copy_edd() - Copy the BIOS EDD information
246 * from boot_params into a safe place.
247 *
248 */
249 static inline void __init copy_edd(void)
250 {
251 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
252 sizeof(edd.mbr_signature));
253 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
254 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
255 edd.edd_info_nr = boot_params.eddbuf_entries;
256 }
257 #else
258 static inline void __init copy_edd(void)
259 {
260 }
261 #endif
262
263 void * __init extend_brk(size_t size, size_t align)
264 {
265 size_t mask = align - 1;
266 void *ret;
267
268 BUG_ON(_brk_start == 0);
269 BUG_ON(align & mask);
270
271 _brk_end = (_brk_end + mask) & ~mask;
272 BUG_ON((char *)(_brk_end + size) > __brk_limit);
273
274 ret = (void *)_brk_end;
275 _brk_end += size;
276
277 memset(ret, 0, size);
278
279 return ret;
280 }
281
282 #ifdef CONFIG_X86_32
283 static void __init cleanup_highmap(void)
284 {
285 }
286 #endif
287
288 static void __init reserve_brk(void)
289 {
290 if (_brk_end > _brk_start)
291 memblock_reserve(__pa_symbol(_brk_start),
292 _brk_end - _brk_start);
293
294 /* Mark brk area as locked down and no longer taking any
295 new allocations */
296 _brk_start = 0;
297 }
298
299 #ifdef CONFIG_BLK_DEV_INITRD
300
301 static u64 __init get_ramdisk_image(void)
302 {
303 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
304
305 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
306
307 return ramdisk_image;
308 }
309 static u64 __init get_ramdisk_size(void)
310 {
311 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
312
313 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
314
315 return ramdisk_size;
316 }
317
318 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
319 static void __init relocate_initrd(void)
320 {
321 /* Assume only end is not page aligned */
322 u64 ramdisk_image = get_ramdisk_image();
323 u64 ramdisk_size = get_ramdisk_size();
324 u64 area_size = PAGE_ALIGN(ramdisk_size);
325 u64 ramdisk_here;
326 unsigned long slop, clen, mapaddr;
327 char *p, *q;
328
329 /* We need to move the initrd down into directly mapped mem */
330 ramdisk_here = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
331 area_size, PAGE_SIZE);
332
333 if (!ramdisk_here)
334 panic("Cannot find place for new RAMDISK of size %lld\n",
335 ramdisk_size);
336
337 /* Note: this includes all the mem currently occupied by
338 the initrd, we rely on that fact to keep the data intact. */
339 memblock_reserve(ramdisk_here, area_size);
340 initrd_start = ramdisk_here + PAGE_OFFSET;
341 initrd_end = initrd_start + ramdisk_size;
342 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
343 ramdisk_here, ramdisk_here + ramdisk_size - 1);
344
345 q = (char *)initrd_start;
346
347 /* Copy the initrd */
348 while (ramdisk_size) {
349 slop = ramdisk_image & ~PAGE_MASK;
350 clen = ramdisk_size;
351 if (clen > MAX_MAP_CHUNK-slop)
352 clen = MAX_MAP_CHUNK-slop;
353 mapaddr = ramdisk_image & PAGE_MASK;
354 p = early_memremap(mapaddr, clen+slop);
355 memcpy(q, p+slop, clen);
356 early_iounmap(p, clen+slop);
357 q += clen;
358 ramdisk_image += clen;
359 ramdisk_size -= clen;
360 }
361
362 ramdisk_image = get_ramdisk_image();
363 ramdisk_size = get_ramdisk_size();
364 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
365 " [mem %#010llx-%#010llx]\n",
366 ramdisk_image, ramdisk_image + ramdisk_size - 1,
367 ramdisk_here, ramdisk_here + ramdisk_size - 1);
368 }
369
370 static void __init early_reserve_initrd(void)
371 {
372 /* Assume only end is not page aligned */
373 u64 ramdisk_image = get_ramdisk_image();
374 u64 ramdisk_size = get_ramdisk_size();
375 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
376
377 if (!boot_params.hdr.type_of_loader ||
378 !ramdisk_image || !ramdisk_size)
379 return; /* No initrd provided by bootloader */
380
381 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
382 }
383 static void __init reserve_initrd(void)
384 {
385 /* Assume only end is not page aligned */
386 u64 ramdisk_image = get_ramdisk_image();
387 u64 ramdisk_size = get_ramdisk_size();
388 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
389 u64 mapped_size;
390
391 if (!boot_params.hdr.type_of_loader ||
392 !ramdisk_image || !ramdisk_size)
393 return; /* No initrd provided by bootloader */
394
395 initrd_start = 0;
396
397 mapped_size = memblock_mem_size(max_pfn_mapped);
398 if (ramdisk_size >= (mapped_size>>1))
399 panic("initrd too large to handle, "
400 "disabling initrd (%lld needed, %lld available)\n",
401 ramdisk_size, mapped_size>>1);
402
403 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
404 ramdisk_end - 1);
405
406 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
407 PFN_DOWN(ramdisk_end))) {
408 /* All are mapped, easy case */
409 initrd_start = ramdisk_image + PAGE_OFFSET;
410 initrd_end = initrd_start + ramdisk_size;
411 return;
412 }
413
414 relocate_initrd();
415
416 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
417 }
418 #else
419 static void __init early_reserve_initrd(void)
420 {
421 }
422 static void __init reserve_initrd(void)
423 {
424 }
425 #endif /* CONFIG_BLK_DEV_INITRD */
426
427 static void __init parse_setup_data(void)
428 {
429 struct setup_data *data;
430 u64 pa_data;
431
432 pa_data = boot_params.hdr.setup_data;
433 while (pa_data) {
434 u32 data_len, map_len;
435
436 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK),
437 (u64)sizeof(struct setup_data));
438 data = early_memremap(pa_data, map_len);
439 data_len = data->len + sizeof(struct setup_data);
440 if (data_len > map_len) {
441 early_iounmap(data, map_len);
442 data = early_memremap(pa_data, data_len);
443 map_len = data_len;
444 }
445
446 switch (data->type) {
447 case SETUP_E820_EXT:
448 parse_e820_ext(data);
449 break;
450 case SETUP_DTB:
451 add_dtb(pa_data);
452 break;
453 default:
454 break;
455 }
456 pa_data = data->next;
457 early_iounmap(data, map_len);
458 }
459 }
460
461 static void __init e820_reserve_setup_data(void)
462 {
463 struct setup_data *data;
464 u64 pa_data;
465 int found = 0;
466
467 pa_data = boot_params.hdr.setup_data;
468 while (pa_data) {
469 data = early_memremap(pa_data, sizeof(*data));
470 e820_update_range(pa_data, sizeof(*data)+data->len,
471 E820_RAM, E820_RESERVED_KERN);
472 found = 1;
473 pa_data = data->next;
474 early_iounmap(data, sizeof(*data));
475 }
476 if (!found)
477 return;
478
479 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
480 memcpy(&e820_saved, &e820, sizeof(struct e820map));
481 printk(KERN_INFO "extended physical RAM map:\n");
482 e820_print_map("reserve setup_data");
483 }
484
485 static void __init memblock_x86_reserve_range_setup_data(void)
486 {
487 struct setup_data *data;
488 u64 pa_data;
489
490 pa_data = boot_params.hdr.setup_data;
491 while (pa_data) {
492 data = early_memremap(pa_data, sizeof(*data));
493 memblock_reserve(pa_data, sizeof(*data) + data->len);
494 pa_data = data->next;
495 early_iounmap(data, sizeof(*data));
496 }
497 }
498
499 /*
500 * --------- Crashkernel reservation ------------------------------
501 */
502
503 #ifdef CONFIG_KEXEC
504
505 /*
506 * Keep the crash kernel below this limit. On 32 bits earlier kernels
507 * would limit the kernel to the low 512 MiB due to mapping restrictions.
508 * On 64bit, old kexec-tools need to under 896MiB.
509 */
510 #ifdef CONFIG_X86_32
511 # define CRASH_KERNEL_ADDR_LOW_MAX (512 << 20)
512 # define CRASH_KERNEL_ADDR_HIGH_MAX (512 << 20)
513 #else
514 # define CRASH_KERNEL_ADDR_LOW_MAX (896UL<<20)
515 # define CRASH_KERNEL_ADDR_HIGH_MAX MAXMEM
516 #endif
517
518 static void __init reserve_crashkernel_low(void)
519 {
520 #ifdef CONFIG_X86_64
521 const unsigned long long alignment = 16<<20; /* 16M */
522 unsigned long long low_base = 0, low_size = 0;
523 unsigned long total_low_mem;
524 unsigned long long base;
525 bool auto_set = false;
526 int ret;
527
528 total_low_mem = memblock_mem_size(1UL<<(32-PAGE_SHIFT));
529 /* crashkernel=Y,low */
530 ret = parse_crashkernel_low(boot_command_line, total_low_mem,
531 &low_size, &base);
532 if (ret != 0) {
533 /*
534 * two parts from lib/swiotlb.c:
535 * swiotlb size: user specified with swiotlb= or default.
536 * swiotlb overflow buffer: now is hardcoded to 32k.
537 * We round it to 8M for other buffers that
538 * may need to stay low too.
539 */
540 low_size = swiotlb_size_or_default() + (8UL<<20);
541 auto_set = true;
542 } else {
543 /* passed with crashkernel=0,low ? */
544 if (!low_size)
545 return;
546 }
547
548 low_base = memblock_find_in_range(low_size, (1ULL<<32),
549 low_size, alignment);
550
551 if (!low_base) {
552 if (!auto_set)
553 pr_info("crashkernel low reservation failed - No suitable area found.\n");
554
555 return;
556 }
557
558 memblock_reserve(low_base, low_size);
559 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n",
560 (unsigned long)(low_size >> 20),
561 (unsigned long)(low_base >> 20),
562 (unsigned long)(total_low_mem >> 20));
563 crashk_low_res.start = low_base;
564 crashk_low_res.end = low_base + low_size - 1;
565 insert_resource(&iomem_resource, &crashk_low_res);
566 #endif
567 }
568
569 static void __init reserve_crashkernel(void)
570 {
571 const unsigned long long alignment = 16<<20; /* 16M */
572 unsigned long long total_mem;
573 unsigned long long crash_size, crash_base;
574 bool high = false;
575 int ret;
576
577 total_mem = memblock_phys_mem_size();
578
579 /* crashkernel=XM */
580 ret = parse_crashkernel(boot_command_line, total_mem,
581 &crash_size, &crash_base);
582 if (ret != 0 || crash_size <= 0) {
583 /* crashkernel=X,high */
584 ret = parse_crashkernel_high(boot_command_line, total_mem,
585 &crash_size, &crash_base);
586 if (ret != 0 || crash_size <= 0)
587 return;
588 high = true;
589 }
590
591 /* 0 means: find the address automatically */
592 if (crash_base <= 0) {
593 /*
594 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
595 */
596 crash_base = memblock_find_in_range(alignment,
597 high ? CRASH_KERNEL_ADDR_HIGH_MAX :
598 CRASH_KERNEL_ADDR_LOW_MAX,
599 crash_size, alignment);
600
601 if (!crash_base) {
602 pr_info("crashkernel reservation failed - No suitable area found.\n");
603 return;
604 }
605
606 } else {
607 unsigned long long start;
608
609 start = memblock_find_in_range(crash_base,
610 crash_base + crash_size, crash_size, 1<<20);
611 if (start != crash_base) {
612 pr_info("crashkernel reservation failed - memory is in use.\n");
613 return;
614 }
615 }
616 memblock_reserve(crash_base, crash_size);
617
618 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
619 "for crashkernel (System RAM: %ldMB)\n",
620 (unsigned long)(crash_size >> 20),
621 (unsigned long)(crash_base >> 20),
622 (unsigned long)(total_mem >> 20));
623
624 crashk_res.start = crash_base;
625 crashk_res.end = crash_base + crash_size - 1;
626 insert_resource(&iomem_resource, &crashk_res);
627
628 if (crash_base >= (1ULL<<32))
629 reserve_crashkernel_low();
630 }
631 #else
632 static void __init reserve_crashkernel(void)
633 {
634 }
635 #endif
636
637 static struct resource standard_io_resources[] = {
638 { .name = "dma1", .start = 0x00, .end = 0x1f,
639 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
640 { .name = "pic1", .start = 0x20, .end = 0x21,
641 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
642 { .name = "timer0", .start = 0x40, .end = 0x43,
643 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
644 { .name = "timer1", .start = 0x50, .end = 0x53,
645 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
646 { .name = "keyboard", .start = 0x60, .end = 0x60,
647 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
648 { .name = "keyboard", .start = 0x64, .end = 0x64,
649 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
650 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
651 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
652 { .name = "pic2", .start = 0xa0, .end = 0xa1,
653 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
654 { .name = "dma2", .start = 0xc0, .end = 0xdf,
655 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
656 { .name = "fpu", .start = 0xf0, .end = 0xff,
657 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
658 };
659
660 void __init reserve_standard_io_resources(void)
661 {
662 int i;
663
664 /* request I/O space for devices used on all i[345]86 PCs */
665 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
666 request_resource(&ioport_resource, &standard_io_resources[i]);
667
668 }
669
670 static __init void reserve_ibft_region(void)
671 {
672 unsigned long addr, size = 0;
673
674 addr = find_ibft_region(&size);
675
676 if (size)
677 memblock_reserve(addr, size);
678 }
679
680 static bool __init snb_gfx_workaround_needed(void)
681 {
682 #ifdef CONFIG_PCI
683 int i;
684 u16 vendor, devid;
685 static const __initconst u16 snb_ids[] = {
686 0x0102,
687 0x0112,
688 0x0122,
689 0x0106,
690 0x0116,
691 0x0126,
692 0x010a,
693 };
694
695 /* Assume no if something weird is going on with PCI */
696 if (!early_pci_allowed())
697 return false;
698
699 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
700 if (vendor != 0x8086)
701 return false;
702
703 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
704 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
705 if (devid == snb_ids[i])
706 return true;
707 #endif
708
709 return false;
710 }
711
712 /*
713 * Sandy Bridge graphics has trouble with certain ranges, exclude
714 * them from allocation.
715 */
716 static void __init trim_snb_memory(void)
717 {
718 static const __initconst unsigned long bad_pages[] = {
719 0x20050000,
720 0x20110000,
721 0x20130000,
722 0x20138000,
723 0x40004000,
724 };
725 int i;
726
727 if (!snb_gfx_workaround_needed())
728 return;
729
730 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
731
732 /*
733 * Reserve all memory below the 1 MB mark that has not
734 * already been reserved.
735 */
736 memblock_reserve(0, 1<<20);
737
738 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
739 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
740 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
741 bad_pages[i]);
742 }
743 }
744
745 /*
746 * Here we put platform-specific memory range workarounds, i.e.
747 * memory known to be corrupt or otherwise in need to be reserved on
748 * specific platforms.
749 *
750 * If this gets used more widely it could use a real dispatch mechanism.
751 */
752 static void __init trim_platform_memory_ranges(void)
753 {
754 trim_snb_memory();
755 }
756
757 static void __init trim_bios_range(void)
758 {
759 /*
760 * A special case is the first 4Kb of memory;
761 * This is a BIOS owned area, not kernel ram, but generally
762 * not listed as such in the E820 table.
763 *
764 * This typically reserves additional memory (64KiB by default)
765 * since some BIOSes are known to corrupt low memory. See the
766 * Kconfig help text for X86_RESERVE_LOW.
767 */
768 e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
769
770 /*
771 * special case: Some BIOSen report the PC BIOS
772 * area (640->1Mb) as ram even though it is not.
773 * take them out.
774 */
775 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
776
777 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
778 }
779
780 /* called before trim_bios_range() to spare extra sanitize */
781 static void __init e820_add_kernel_range(void)
782 {
783 u64 start = __pa_symbol(_text);
784 u64 size = __pa_symbol(_end) - start;
785
786 /*
787 * Complain if .text .data and .bss are not marked as E820_RAM and
788 * attempt to fix it by adding the range. We may have a confused BIOS,
789 * or the user may have used memmap=exactmap or memmap=xxM$yyM to
790 * exclude kernel range. If we really are running on top non-RAM,
791 * we will crash later anyways.
792 */
793 if (e820_all_mapped(start, start + size, E820_RAM))
794 return;
795
796 pr_warn(".text .data .bss are not marked as E820_RAM!\n");
797 e820_remove_range(start, size, E820_RAM, 0);
798 e820_add_region(start, size, E820_RAM);
799 }
800
801 static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
802
803 static int __init parse_reservelow(char *p)
804 {
805 unsigned long long size;
806
807 if (!p)
808 return -EINVAL;
809
810 size = memparse(p, &p);
811
812 if (size < 4096)
813 size = 4096;
814
815 if (size > 640*1024)
816 size = 640*1024;
817
818 reserve_low = size;
819
820 return 0;
821 }
822
823 early_param("reservelow", parse_reservelow);
824
825 static void __init trim_low_memory_range(void)
826 {
827 memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE));
828 }
829
830 /*
831 * Determine if we were loaded by an EFI loader. If so, then we have also been
832 * passed the efi memmap, systab, etc., so we should use these data structures
833 * for initialization. Note, the efi init code path is determined by the
834 * global efi_enabled. This allows the same kernel image to be used on existing
835 * systems (with a traditional BIOS) as well as on EFI systems.
836 */
837 /*
838 * setup_arch - architecture-specific boot-time initializations
839 *
840 * Note: On x86_64, fixmaps are ready for use even before this is called.
841 */
842
843 void __init setup_arch(char **cmdline_p)
844 {
845 memblock_reserve(__pa_symbol(_text),
846 (unsigned long)__bss_stop - (unsigned long)_text);
847
848 early_reserve_initrd();
849
850 /*
851 * At this point everything still needed from the boot loader
852 * or BIOS or kernel text should be early reserved or marked not
853 * RAM in e820. All other memory is free game.
854 */
855
856 #ifdef CONFIG_X86_32
857 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
858 visws_early_detect();
859
860 /*
861 * copy kernel address range established so far and switch
862 * to the proper swapper page table
863 */
864 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
865 initial_page_table + KERNEL_PGD_BOUNDARY,
866 KERNEL_PGD_PTRS);
867
868 load_cr3(swapper_pg_dir);
869 __flush_tlb_all();
870 #else
871 printk(KERN_INFO "Command line: %s\n", boot_command_line);
872 #endif
873
874 /*
875 * If we have OLPC OFW, we might end up relocating the fixmap due to
876 * reserve_top(), so do this before touching the ioremap area.
877 */
878 olpc_ofw_detect();
879
880 early_trap_init();
881 early_cpu_init();
882 early_ioremap_init();
883
884 setup_olpc_ofw_pgd();
885
886 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
887 screen_info = boot_params.screen_info;
888 edid_info = boot_params.edid_info;
889 #ifdef CONFIG_X86_32
890 apm_info.bios = boot_params.apm_bios_info;
891 ist_info = boot_params.ist_info;
892 if (boot_params.sys_desc_table.length != 0) {
893 machine_id = boot_params.sys_desc_table.table[0];
894 machine_submodel_id = boot_params.sys_desc_table.table[1];
895 BIOS_revision = boot_params.sys_desc_table.table[2];
896 }
897 #endif
898 saved_video_mode = boot_params.hdr.vid_mode;
899 bootloader_type = boot_params.hdr.type_of_loader;
900 if ((bootloader_type >> 4) == 0xe) {
901 bootloader_type &= 0xf;
902 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
903 }
904 bootloader_version = bootloader_type & 0xf;
905 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
906
907 #ifdef CONFIG_BLK_DEV_RAM
908 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
909 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
910 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
911 #endif
912 #ifdef CONFIG_EFI
913 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
914 "EL32", 4)) {
915 set_bit(EFI_BOOT, &x86_efi_facility);
916 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
917 "EL64", 4)) {
918 set_bit(EFI_BOOT, &x86_efi_facility);
919 set_bit(EFI_64BIT, &x86_efi_facility);
920 }
921
922 if (efi_enabled(EFI_BOOT))
923 efi_memblock_x86_reserve_range();
924 #endif
925
926 x86_init.oem.arch_setup();
927
928 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
929 setup_memory_map();
930 parse_setup_data();
931 /* update the e820_saved too */
932 e820_reserve_setup_data();
933
934 copy_edd();
935
936 if (!boot_params.hdr.root_flags)
937 root_mountflags &= ~MS_RDONLY;
938 init_mm.start_code = (unsigned long) _text;
939 init_mm.end_code = (unsigned long) _etext;
940 init_mm.end_data = (unsigned long) _edata;
941 init_mm.brk = _brk_end;
942
943 code_resource.start = __pa_symbol(_text);
944 code_resource.end = __pa_symbol(_etext)-1;
945 data_resource.start = __pa_symbol(_etext);
946 data_resource.end = __pa_symbol(_edata)-1;
947 bss_resource.start = __pa_symbol(__bss_start);
948 bss_resource.end = __pa_symbol(__bss_stop)-1;
949
950 #ifdef CONFIG_CMDLINE_BOOL
951 #ifdef CONFIG_CMDLINE_OVERRIDE
952 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
953 #else
954 if (builtin_cmdline[0]) {
955 /* append boot loader cmdline to builtin */
956 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
957 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
958 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
959 }
960 #endif
961 #endif
962
963 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
964 *cmdline_p = command_line;
965
966 /*
967 * x86_configure_nx() is called before parse_early_param() to detect
968 * whether hardware doesn't support NX (so that the early EHCI debug
969 * console setup can safely call set_fixmap()). It may then be called
970 * again from within noexec_setup() during parsing early parameters
971 * to honor the respective command line option.
972 */
973 x86_configure_nx();
974
975 parse_early_param();
976
977 x86_report_nx();
978
979 /* after early param, so could get panic from serial */
980 memblock_x86_reserve_range_setup_data();
981
982 if (acpi_mps_check()) {
983 #ifdef CONFIG_X86_LOCAL_APIC
984 disable_apic = 1;
985 #endif
986 setup_clear_cpu_cap(X86_FEATURE_APIC);
987 }
988
989 #ifdef CONFIG_PCI
990 if (pci_early_dump_regs)
991 early_dump_pci_devices();
992 #endif
993
994 finish_e820_parsing();
995
996 if (efi_enabled(EFI_BOOT))
997 efi_init();
998
999 dmi_scan_machine();
1000
1001 /*
1002 * VMware detection requires dmi to be available, so this
1003 * needs to be done after dmi_scan_machine, for the BP.
1004 */
1005 init_hypervisor_platform();
1006
1007 x86_init.resources.probe_roms();
1008
1009 /* after parse_early_param, so could debug it */
1010 insert_resource(&iomem_resource, &code_resource);
1011 insert_resource(&iomem_resource, &data_resource);
1012 insert_resource(&iomem_resource, &bss_resource);
1013
1014 e820_add_kernel_range();
1015 trim_bios_range();
1016 #ifdef CONFIG_X86_32
1017 if (ppro_with_ram_bug()) {
1018 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
1019 E820_RESERVED);
1020 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
1021 printk(KERN_INFO "fixed physical RAM map:\n");
1022 e820_print_map("bad_ppro");
1023 }
1024 #else
1025 early_gart_iommu_check();
1026 #endif
1027
1028 /*
1029 * partially used pages are not usable - thus
1030 * we are rounding upwards:
1031 */
1032 max_pfn = e820_end_of_ram_pfn();
1033
1034 /* update e820 for memory not covered by WB MTRRs */
1035 mtrr_bp_init();
1036 if (mtrr_trim_uncached_memory(max_pfn))
1037 max_pfn = e820_end_of_ram_pfn();
1038
1039 #ifdef CONFIG_X86_32
1040 /* max_low_pfn get updated here */
1041 find_low_pfn_range();
1042 #else
1043 num_physpages = max_pfn;
1044
1045 check_x2apic();
1046
1047 /* How many end-of-memory variables you have, grandma! */
1048 /* need this before calling reserve_initrd */
1049 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
1050 max_low_pfn = e820_end_of_low_ram_pfn();
1051 else
1052 max_low_pfn = max_pfn;
1053
1054 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
1055 #endif
1056
1057 /*
1058 * Find and reserve possible boot-time SMP configuration:
1059 */
1060 find_smp_config();
1061
1062 reserve_ibft_region();
1063
1064 early_alloc_pgt_buf();
1065
1066 /*
1067 * Need to conclude brk, before memblock_x86_fill()
1068 * it could use memblock_find_in_range, could overlap with
1069 * brk area.
1070 */
1071 reserve_brk();
1072
1073 cleanup_highmap();
1074
1075 memblock.current_limit = ISA_END_ADDRESS;
1076 memblock_x86_fill();
1077
1078 /*
1079 * The EFI specification says that boot service code won't be called
1080 * after ExitBootServices(). This is, in fact, a lie.
1081 */
1082 if (efi_enabled(EFI_MEMMAP))
1083 efi_reserve_boot_services();
1084
1085 /* preallocate 4k for mptable mpc */
1086 early_reserve_e820_mpc_new();
1087
1088 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1089 setup_bios_corruption_check();
1090 #endif
1091
1092 #ifdef CONFIG_X86_32
1093 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1094 (max_pfn_mapped<<PAGE_SHIFT) - 1);
1095 #endif
1096
1097 reserve_real_mode();
1098
1099 trim_platform_memory_ranges();
1100 trim_low_memory_range();
1101
1102 init_mem_mapping();
1103
1104 early_trap_pf_init();
1105
1106 setup_real_mode();
1107
1108 memblock.current_limit = get_max_mapped();
1109 dma_contiguous_reserve(0);
1110
1111 /*
1112 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
1113 */
1114
1115 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1116 if (init_ohci1394_dma_early)
1117 init_ohci1394_dma_on_all_controllers();
1118 #endif
1119 /* Allocate bigger log buffer */
1120 setup_log_buf(1);
1121
1122 reserve_initrd();
1123
1124 #if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD)
1125 acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
1126 #endif
1127
1128 reserve_crashkernel();
1129
1130 vsmp_init();
1131
1132 io_delay_init();
1133
1134 /*
1135 * Parse the ACPI tables for possible boot-time SMP configuration.
1136 */
1137 acpi_boot_table_init();
1138
1139 early_acpi_boot_init();
1140
1141 initmem_init();
1142 memblock_find_dma_reserve();
1143
1144 #ifdef CONFIG_KVM_GUEST
1145 kvmclock_init();
1146 #endif
1147
1148 x86_init.paging.pagetable_init();
1149
1150 if (boot_cpu_data.cpuid_level >= 0) {
1151 /* A CPU has %cr4 if and only if it has CPUID */
1152 mmu_cr4_features = read_cr4();
1153 if (trampoline_cr4_features)
1154 *trampoline_cr4_features = mmu_cr4_features;
1155 }
1156
1157 #ifdef CONFIG_X86_32
1158 /* sync back kernel address range */
1159 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
1160 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1161 KERNEL_PGD_PTRS);
1162 #endif
1163
1164 tboot_probe();
1165
1166 #ifdef CONFIG_X86_64
1167 map_vsyscall();
1168 #endif
1169
1170 generic_apic_probe();
1171
1172 early_quirks();
1173
1174 /*
1175 * Read APIC and some other early information from ACPI tables.
1176 */
1177 acpi_boot_init();
1178 sfi_init();
1179 x86_dtb_init();
1180
1181 /*
1182 * get boot-time SMP configuration:
1183 */
1184 if (smp_found_config)
1185 get_smp_config();
1186
1187 prefill_possible_map();
1188
1189 init_cpu_to_node();
1190
1191 init_apic_mappings();
1192 if (x86_io_apic_ops.init)
1193 x86_io_apic_ops.init();
1194
1195 kvm_guest_init();
1196
1197 e820_reserve_resources();
1198 e820_mark_nosave_regions(max_low_pfn);
1199
1200 x86_init.resources.reserve_resources();
1201
1202 e820_setup_gap();
1203
1204 #ifdef CONFIG_VT
1205 #if defined(CONFIG_VGA_CONSOLE)
1206 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1207 conswitchp = &vga_con;
1208 #elif defined(CONFIG_DUMMY_CONSOLE)
1209 conswitchp = &dummy_con;
1210 #endif
1211 #endif
1212 x86_init.oem.banner();
1213
1214 x86_init.timers.wallclock_init();
1215
1216 mcheck_init();
1217
1218 arch_init_ideal_nops();
1219
1220 register_refined_jiffies(CLOCK_TICK_RATE);
1221
1222 #ifdef CONFIG_EFI
1223 /* Once setup is done above, unmap the EFI memory map on
1224 * mismatched firmware/kernel archtectures since there is no
1225 * support for runtime services.
1226 */
1227 if (efi_enabled(EFI_BOOT) && !efi_is_native()) {
1228 pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
1229 efi_unmap_memmap();
1230 }
1231 #endif
1232 }
1233
1234 #ifdef CONFIG_X86_32
1235
1236 static struct resource video_ram_resource = {
1237 .name = "Video RAM area",
1238 .start = 0xa0000,
1239 .end = 0xbffff,
1240 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1241 };
1242
1243 void __init i386_reserve_resources(void)
1244 {
1245 request_resource(&iomem_resource, &video_ram_resource);
1246 reserve_standard_io_resources();
1247 }
1248
1249 #endif /* CONFIG_X86_32 */
kernel source for telekom puls (alcatel/mediatek)