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Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[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/mca.h>
38 #include <linux/root_dev.h>
39 #include <linux/highmem.h>
40 #include <linux/module.h>
41 #include <linux/efi.h>
42 #include <linux/init.h>
43 #include <linux/edd.h>
44 #include <linux/iscsi_ibft.h>
45 #include <linux/nodemask.h>
46 #include <linux/kexec.h>
47 #include <linux/dmi.h>
48 #include <linux/pfn.h>
49 #include <linux/pci.h>
50 #include <asm/pci-direct.h>
51 #include <linux/init_ohci1394_dma.h>
52 #include <linux/kvm_para.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
72 #include <video/edid.h>
73
74 #include <asm/mtrr.h>
75 #include <asm/apic.h>
76 #include <asm/trampoline.h>
77 #include <asm/e820.h>
78 #include <asm/mpspec.h>
79 #include <asm/setup.h>
80 #include <asm/efi.h>
81 #include <asm/timer.h>
82 #include <asm/i8259.h>
83 #include <asm/sections.h>
84 #include <asm/dmi.h>
85 #include <asm/io_apic.h>
86 #include <asm/ist.h>
87 #include <asm/setup_arch.h>
88 #include <asm/bios_ebda.h>
89 #include <asm/cacheflush.h>
90 #include <asm/processor.h>
91 #include <asm/bugs.h>
92
93 #include <asm/system.h>
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 #ifdef CONFIG_X86_64
112 #include <asm/numa_64.h>
113 #endif
114 #include <asm/mce.h>
115 #include <asm/alternative.h>
116 #include <asm/prom.h>
117
118 /*
119 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
120 * The direct mapping extends to max_pfn_mapped, so that we can directly access
121 * apertures, ACPI and other tables without having to play with fixmaps.
122 */
123 unsigned long max_low_pfn_mapped;
124 unsigned long max_pfn_mapped;
125
126 #ifdef CONFIG_DMI
127 RESERVE_BRK(dmi_alloc, 65536);
128 #endif
129
130
131 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
132 unsigned long _brk_end = (unsigned long)__brk_base;
133
134 #ifdef CONFIG_X86_64
135 int default_cpu_present_to_apicid(int mps_cpu)
136 {
137 return __default_cpu_present_to_apicid(mps_cpu);
138 }
139
140 int default_check_phys_apicid_present(int phys_apicid)
141 {
142 return __default_check_phys_apicid_present(phys_apicid);
143 }
144 #endif
145
146 #ifndef CONFIG_DEBUG_BOOT_PARAMS
147 struct boot_params __initdata boot_params;
148 #else
149 struct boot_params boot_params;
150 #endif
151
152 /*
153 * Machine setup..
154 */
155 static struct resource data_resource = {
156 .name = "Kernel data",
157 .start = 0,
158 .end = 0,
159 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
160 };
161
162 static struct resource code_resource = {
163 .name = "Kernel code",
164 .start = 0,
165 .end = 0,
166 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
167 };
168
169 static struct resource bss_resource = {
170 .name = "Kernel bss",
171 .start = 0,
172 .end = 0,
173 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
174 };
175
176
177 #ifdef CONFIG_X86_32
178 /* cpu data as detected by the assembly code in head.S */
179 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
180 /* common cpu data for all cpus */
181 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
182 EXPORT_SYMBOL(boot_cpu_data);
183 static void set_mca_bus(int x)
184 {
185 #ifdef CONFIG_MCA
186 MCA_bus = x;
187 #endif
188 }
189
190 unsigned int def_to_bigsmp;
191
192 /* for MCA, but anyone else can use it if they want */
193 unsigned int machine_id;
194 unsigned int machine_submodel_id;
195 unsigned int BIOS_revision;
196
197 struct apm_info apm_info;
198 EXPORT_SYMBOL(apm_info);
199
200 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
201 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
202 struct ist_info ist_info;
203 EXPORT_SYMBOL(ist_info);
204 #else
205 struct ist_info ist_info;
206 #endif
207
208 #else
209 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
210 .x86_phys_bits = MAX_PHYSMEM_BITS,
211 };
212 EXPORT_SYMBOL(boot_cpu_data);
213 #endif
214
215
216 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
217 unsigned long mmu_cr4_features;
218 #else
219 unsigned long mmu_cr4_features = X86_CR4_PAE;
220 #endif
221
222 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
223 int bootloader_type, bootloader_version;
224
225 /*
226 * Setup options
227 */
228 struct screen_info screen_info;
229 EXPORT_SYMBOL(screen_info);
230 struct edid_info edid_info;
231 EXPORT_SYMBOL_GPL(edid_info);
232
233 extern int root_mountflags;
234
235 unsigned long saved_video_mode;
236
237 #define RAMDISK_IMAGE_START_MASK 0x07FF
238 #define RAMDISK_PROMPT_FLAG 0x8000
239 #define RAMDISK_LOAD_FLAG 0x4000
240
241 static char __initdata command_line[COMMAND_LINE_SIZE];
242 #ifdef CONFIG_CMDLINE_BOOL
243 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
244 #endif
245
246 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
247 struct edd edd;
248 #ifdef CONFIG_EDD_MODULE
249 EXPORT_SYMBOL(edd);
250 #endif
251 /**
252 * copy_edd() - Copy the BIOS EDD information
253 * from boot_params into a safe place.
254 *
255 */
256 static inline void __init copy_edd(void)
257 {
258 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
259 sizeof(edd.mbr_signature));
260 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
261 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
262 edd.edd_info_nr = boot_params.eddbuf_entries;
263 }
264 #else
265 static inline void __init copy_edd(void)
266 {
267 }
268 #endif
269
270 void * __init extend_brk(size_t size, size_t align)
271 {
272 size_t mask = align - 1;
273 void *ret;
274
275 BUG_ON(_brk_start == 0);
276 BUG_ON(align & mask);
277
278 _brk_end = (_brk_end + mask) & ~mask;
279 BUG_ON((char *)(_brk_end + size) > __brk_limit);
280
281 ret = (void *)_brk_end;
282 _brk_end += size;
283
284 memset(ret, 0, size);
285
286 return ret;
287 }
288
289 #ifdef CONFIG_X86_64
290 static void __init init_gbpages(void)
291 {
292 if (direct_gbpages && cpu_has_gbpages)
293 printk(KERN_INFO "Using GB pages for direct mapping\n");
294 else
295 direct_gbpages = 0;
296 }
297 #else
298 static inline void init_gbpages(void)
299 {
300 }
301 static void __init cleanup_highmap(void)
302 {
303 }
304 #endif
305
306 static void __init reserve_brk(void)
307 {
308 if (_brk_end > _brk_start)
309 memblock_x86_reserve_range(__pa(_brk_start), __pa(_brk_end), "BRK");
310
311 /* Mark brk area as locked down and no longer taking any
312 new allocations */
313 _brk_start = 0;
314 }
315
316 #ifdef CONFIG_BLK_DEV_INITRD
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 = boot_params.hdr.ramdisk_image;
323 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
324 u64 area_size = PAGE_ALIGN(ramdisk_size);
325 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
326 u64 ramdisk_here;
327 unsigned long slop, clen, mapaddr;
328 char *p, *q;
329
330 /* We need to move the initrd down into lowmem */
331 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size,
332 PAGE_SIZE);
333
334 if (ramdisk_here == MEMBLOCK_ERROR)
335 panic("Cannot find place for new RAMDISK of size %lld\n",
336 ramdisk_size);
337
338 /* Note: this includes all the lowmem currently occupied by
339 the initrd, we rely on that fact to keep the data intact. */
340 memblock_x86_reserve_range(ramdisk_here, ramdisk_here + area_size, "NEW RAMDISK");
341 initrd_start = ramdisk_here + PAGE_OFFSET;
342 initrd_end = initrd_start + ramdisk_size;
343 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
344 ramdisk_here, ramdisk_here + ramdisk_size);
345
346 q = (char *)initrd_start;
347
348 /* Copy any lowmem portion of the initrd */
349 if (ramdisk_image < end_of_lowmem) {
350 clen = end_of_lowmem - ramdisk_image;
351 p = (char *)__va(ramdisk_image);
352 memcpy(q, p, clen);
353 q += clen;
354 ramdisk_image += clen;
355 ramdisk_size -= clen;
356 }
357
358 /* Copy the highmem portion of the initrd */
359 while (ramdisk_size) {
360 slop = ramdisk_image & ~PAGE_MASK;
361 clen = ramdisk_size;
362 if (clen > MAX_MAP_CHUNK-slop)
363 clen = MAX_MAP_CHUNK-slop;
364 mapaddr = ramdisk_image & PAGE_MASK;
365 p = early_memremap(mapaddr, clen+slop);
366 memcpy(q, p+slop, clen);
367 early_iounmap(p, clen+slop);
368 q += clen;
369 ramdisk_image += clen;
370 ramdisk_size -= clen;
371 }
372 /* high pages is not converted by early_res_to_bootmem */
373 ramdisk_image = boot_params.hdr.ramdisk_image;
374 ramdisk_size = boot_params.hdr.ramdisk_size;
375 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
376 " %08llx - %08llx\n",
377 ramdisk_image, ramdisk_image + ramdisk_size - 1,
378 ramdisk_here, ramdisk_here + ramdisk_size - 1);
379 }
380
381 static void __init reserve_initrd(void)
382 {
383 /* Assume only end is not page aligned */
384 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
385 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
386 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
387 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
388
389 if (!boot_params.hdr.type_of_loader ||
390 !ramdisk_image || !ramdisk_size)
391 return; /* No initrd provided by bootloader */
392
393 initrd_start = 0;
394
395 if (ramdisk_size >= (end_of_lowmem>>1)) {
396 memblock_x86_free_range(ramdisk_image, ramdisk_end);
397 printk(KERN_ERR "initrd too large to handle, "
398 "disabling initrd\n");
399 return;
400 }
401
402 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
403 ramdisk_end);
404
405
406 if (ramdisk_end <= end_of_lowmem) {
407 /* All in lowmem, easy case */
408 /*
409 * don't need to reserve again, already reserved early
410 * in i386_start_kernel
411 */
412 initrd_start = ramdisk_image + PAGE_OFFSET;
413 initrd_end = initrd_start + ramdisk_size;
414 return;
415 }
416
417 relocate_initrd();
418
419 memblock_x86_free_range(ramdisk_image, ramdisk_end);
420 }
421 #else
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 if (boot_params.hdr.version < 0x0209)
433 return;
434 pa_data = boot_params.hdr.setup_data;
435 while (pa_data) {
436 u32 data_len, map_len;
437
438 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK),
439 (u64)sizeof(struct setup_data));
440 data = early_memremap(pa_data, map_len);
441 data_len = data->len + sizeof(struct setup_data);
442 if (data_len > map_len) {
443 early_iounmap(data, map_len);
444 data = early_memremap(pa_data, data_len);
445 map_len = data_len;
446 }
447
448 switch (data->type) {
449 case SETUP_E820_EXT:
450 parse_e820_ext(data);
451 break;
452 case SETUP_DTB:
453 add_dtb(pa_data);
454 break;
455 default:
456 break;
457 }
458 pa_data = data->next;
459 early_iounmap(data, map_len);
460 }
461 }
462
463 static void __init e820_reserve_setup_data(void)
464 {
465 struct setup_data *data;
466 u64 pa_data;
467 int found = 0;
468
469 if (boot_params.hdr.version < 0x0209)
470 return;
471 pa_data = boot_params.hdr.setup_data;
472 while (pa_data) {
473 data = early_memremap(pa_data, sizeof(*data));
474 e820_update_range(pa_data, sizeof(*data)+data->len,
475 E820_RAM, E820_RESERVED_KERN);
476 found = 1;
477 pa_data = data->next;
478 early_iounmap(data, sizeof(*data));
479 }
480 if (!found)
481 return;
482
483 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
484 memcpy(&e820_saved, &e820, sizeof(struct e820map));
485 printk(KERN_INFO "extended physical RAM map:\n");
486 e820_print_map("reserve setup_data");
487 }
488
489 static void __init memblock_x86_reserve_range_setup_data(void)
490 {
491 struct setup_data *data;
492 u64 pa_data;
493 char buf[32];
494
495 if (boot_params.hdr.version < 0x0209)
496 return;
497 pa_data = boot_params.hdr.setup_data;
498 while (pa_data) {
499 data = early_memremap(pa_data, sizeof(*data));
500 sprintf(buf, "setup data %x", data->type);
501 memblock_x86_reserve_range(pa_data, pa_data+sizeof(*data)+data->len, buf);
502 pa_data = data->next;
503 early_iounmap(data, sizeof(*data));
504 }
505 }
506
507 /*
508 * --------- Crashkernel reservation ------------------------------
509 */
510
511 #ifdef CONFIG_KEXEC
512
513 static inline unsigned long long get_total_mem(void)
514 {
515 unsigned long long total;
516
517 total = max_pfn - min_low_pfn;
518
519 return total << PAGE_SHIFT;
520 }
521
522 /*
523 * Keep the crash kernel below this limit. On 32 bits earlier kernels
524 * would limit the kernel to the low 512 MiB due to mapping restrictions.
525 * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this
526 * limit once kexec-tools are fixed.
527 */
528 #ifdef CONFIG_X86_32
529 # define CRASH_KERNEL_ADDR_MAX (512 << 20)
530 #else
531 # define CRASH_KERNEL_ADDR_MAX (896 << 20)
532 #endif
533
534 static void __init reserve_crashkernel(void)
535 {
536 unsigned long long total_mem;
537 unsigned long long crash_size, crash_base;
538 int ret;
539
540 total_mem = get_total_mem();
541
542 ret = parse_crashkernel(boot_command_line, total_mem,
543 &crash_size, &crash_base);
544 if (ret != 0 || crash_size <= 0)
545 return;
546
547 /* 0 means: find the address automatically */
548 if (crash_base <= 0) {
549 const unsigned long long alignment = 16<<20; /* 16M */
550
551 /*
552 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
553 */
554 crash_base = memblock_find_in_range(alignment,
555 CRASH_KERNEL_ADDR_MAX, crash_size, alignment);
556
557 if (crash_base == MEMBLOCK_ERROR) {
558 pr_info("crashkernel reservation failed - No suitable area found.\n");
559 return;
560 }
561 } else {
562 unsigned long long start;
563
564 start = memblock_find_in_range(crash_base,
565 crash_base + crash_size, crash_size, 1<<20);
566 if (start != crash_base) {
567 pr_info("crashkernel reservation failed - memory is in use.\n");
568 return;
569 }
570 }
571 memblock_x86_reserve_range(crash_base, crash_base + crash_size, "CRASH KERNEL");
572
573 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
574 "for crashkernel (System RAM: %ldMB)\n",
575 (unsigned long)(crash_size >> 20),
576 (unsigned long)(crash_base >> 20),
577 (unsigned long)(total_mem >> 20));
578
579 crashk_res.start = crash_base;
580 crashk_res.end = crash_base + crash_size - 1;
581 insert_resource(&iomem_resource, &crashk_res);
582 }
583 #else
584 static void __init reserve_crashkernel(void)
585 {
586 }
587 #endif
588
589 static struct resource standard_io_resources[] = {
590 { .name = "dma1", .start = 0x00, .end = 0x1f,
591 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
592 { .name = "pic1", .start = 0x20, .end = 0x21,
593 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
594 { .name = "timer0", .start = 0x40, .end = 0x43,
595 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
596 { .name = "timer1", .start = 0x50, .end = 0x53,
597 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
598 { .name = "keyboard", .start = 0x60, .end = 0x60,
599 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
600 { .name = "keyboard", .start = 0x64, .end = 0x64,
601 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
602 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
603 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
604 { .name = "pic2", .start = 0xa0, .end = 0xa1,
605 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
606 { .name = "dma2", .start = 0xc0, .end = 0xdf,
607 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
608 { .name = "fpu", .start = 0xf0, .end = 0xff,
609 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
610 };
611
612 void __init reserve_standard_io_resources(void)
613 {
614 int i;
615
616 /* request I/O space for devices used on all i[345]86 PCs */
617 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
618 request_resource(&ioport_resource, &standard_io_resources[i]);
619
620 }
621
622 static __init void reserve_ibft_region(void)
623 {
624 unsigned long addr, size = 0;
625
626 addr = find_ibft_region(&size);
627
628 if (size)
629 memblock_x86_reserve_range(addr, addr + size, "* ibft");
630 }
631
632 static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
633
634 static void __init trim_bios_range(void)
635 {
636 /*
637 * A special case is the first 4Kb of memory;
638 * This is a BIOS owned area, not kernel ram, but generally
639 * not listed as such in the E820 table.
640 *
641 * This typically reserves additional memory (64KiB by default)
642 * since some BIOSes are known to corrupt low memory. See the
643 * Kconfig help text for X86_RESERVE_LOW.
644 */
645 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE),
646 E820_RAM, E820_RESERVED);
647
648 /*
649 * special case: Some BIOSen report the PC BIOS
650 * area (640->1Mb) as ram even though it is not.
651 * take them out.
652 */
653 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
654 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
655 }
656
657 static int __init parse_reservelow(char *p)
658 {
659 unsigned long long size;
660
661 if (!p)
662 return -EINVAL;
663
664 size = memparse(p, &p);
665
666 if (size < 4096)
667 size = 4096;
668
669 if (size > 640*1024)
670 size = 640*1024;
671
672 reserve_low = size;
673
674 return 0;
675 }
676
677 early_param("reservelow", parse_reservelow);
678
679 /*
680 * Determine if we were loaded by an EFI loader. If so, then we have also been
681 * passed the efi memmap, systab, etc., so we should use these data structures
682 * for initialization. Note, the efi init code path is determined by the
683 * global efi_enabled. This allows the same kernel image to be used on existing
684 * systems (with a traditional BIOS) as well as on EFI systems.
685 */
686 /*
687 * setup_arch - architecture-specific boot-time initializations
688 *
689 * Note: On x86_64, fixmaps are ready for use even before this is called.
690 */
691
692 void __init setup_arch(char **cmdline_p)
693 {
694 #ifdef CONFIG_X86_32
695 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
696 visws_early_detect();
697
698 /*
699 * copy kernel address range established so far and switch
700 * to the proper swapper page table
701 */
702 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
703 initial_page_table + KERNEL_PGD_BOUNDARY,
704 KERNEL_PGD_PTRS);
705
706 load_cr3(swapper_pg_dir);
707 __flush_tlb_all();
708 #else
709 printk(KERN_INFO "Command line: %s\n", boot_command_line);
710 #endif
711
712 /*
713 * If we have OLPC OFW, we might end up relocating the fixmap due to
714 * reserve_top(), so do this before touching the ioremap area.
715 */
716 olpc_ofw_detect();
717
718 early_trap_init();
719 early_cpu_init();
720 early_ioremap_init();
721
722 setup_olpc_ofw_pgd();
723
724 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
725 screen_info = boot_params.screen_info;
726 edid_info = boot_params.edid_info;
727 #ifdef CONFIG_X86_32
728 apm_info.bios = boot_params.apm_bios_info;
729 ist_info = boot_params.ist_info;
730 if (boot_params.sys_desc_table.length != 0) {
731 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
732 machine_id = boot_params.sys_desc_table.table[0];
733 machine_submodel_id = boot_params.sys_desc_table.table[1];
734 BIOS_revision = boot_params.sys_desc_table.table[2];
735 }
736 #endif
737 saved_video_mode = boot_params.hdr.vid_mode;
738 bootloader_type = boot_params.hdr.type_of_loader;
739 if ((bootloader_type >> 4) == 0xe) {
740 bootloader_type &= 0xf;
741 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
742 }
743 bootloader_version = bootloader_type & 0xf;
744 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
745
746 #ifdef CONFIG_BLK_DEV_RAM
747 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
748 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
749 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
750 #endif
751 #ifdef CONFIG_EFI
752 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
753 #ifdef CONFIG_X86_32
754 "EL32",
755 #else
756 "EL64",
757 #endif
758 4)) {
759 efi_enabled = 1;
760 efi_memblock_x86_reserve_range();
761 }
762 #endif
763
764 x86_init.oem.arch_setup();
765
766 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
767 setup_memory_map();
768 parse_setup_data();
769 /* update the e820_saved too */
770 e820_reserve_setup_data();
771
772 copy_edd();
773
774 if (!boot_params.hdr.root_flags)
775 root_mountflags &= ~MS_RDONLY;
776 init_mm.start_code = (unsigned long) _text;
777 init_mm.end_code = (unsigned long) _etext;
778 init_mm.end_data = (unsigned long) _edata;
779 init_mm.brk = _brk_end;
780
781 code_resource.start = virt_to_phys(_text);
782 code_resource.end = virt_to_phys(_etext)-1;
783 data_resource.start = virt_to_phys(_etext);
784 data_resource.end = virt_to_phys(_edata)-1;
785 bss_resource.start = virt_to_phys(&__bss_start);
786 bss_resource.end = virt_to_phys(&__bss_stop)-1;
787
788 #ifdef CONFIG_CMDLINE_BOOL
789 #ifdef CONFIG_CMDLINE_OVERRIDE
790 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
791 #else
792 if (builtin_cmdline[0]) {
793 /* append boot loader cmdline to builtin */
794 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
795 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
796 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
797 }
798 #endif
799 #endif
800
801 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
802 *cmdline_p = command_line;
803
804 /*
805 * x86_configure_nx() is called before parse_early_param() to detect
806 * whether hardware doesn't support NX (so that the early EHCI debug
807 * console setup can safely call set_fixmap()). It may then be called
808 * again from within noexec_setup() during parsing early parameters
809 * to honor the respective command line option.
810 */
811 x86_configure_nx();
812
813 parse_early_param();
814
815 x86_report_nx();
816
817 /* after early param, so could get panic from serial */
818 memblock_x86_reserve_range_setup_data();
819
820 if (acpi_mps_check()) {
821 #ifdef CONFIG_X86_LOCAL_APIC
822 disable_apic = 1;
823 #endif
824 setup_clear_cpu_cap(X86_FEATURE_APIC);
825 }
826
827 #ifdef CONFIG_PCI
828 if (pci_early_dump_regs)
829 early_dump_pci_devices();
830 #endif
831
832 finish_e820_parsing();
833
834 if (efi_enabled)
835 efi_init();
836
837 dmi_scan_machine();
838
839 /*
840 * VMware detection requires dmi to be available, so this
841 * needs to be done after dmi_scan_machine, for the BP.
842 */
843 init_hypervisor_platform();
844
845 x86_init.resources.probe_roms();
846
847 /* after parse_early_param, so could debug it */
848 insert_resource(&iomem_resource, &code_resource);
849 insert_resource(&iomem_resource, &data_resource);
850 insert_resource(&iomem_resource, &bss_resource);
851
852 trim_bios_range();
853 #ifdef CONFIG_X86_32
854 if (ppro_with_ram_bug()) {
855 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
856 E820_RESERVED);
857 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
858 printk(KERN_INFO "fixed physical RAM map:\n");
859 e820_print_map("bad_ppro");
860 }
861 #else
862 early_gart_iommu_check();
863 #endif
864
865 /*
866 * partially used pages are not usable - thus
867 * we are rounding upwards:
868 */
869 max_pfn = e820_end_of_ram_pfn();
870
871 /* update e820 for memory not covered by WB MTRRs */
872 mtrr_bp_init();
873 if (mtrr_trim_uncached_memory(max_pfn))
874 max_pfn = e820_end_of_ram_pfn();
875
876 #ifdef CONFIG_X86_32
877 /* max_low_pfn get updated here */
878 find_low_pfn_range();
879 #else
880 num_physpages = max_pfn;
881
882 check_x2apic();
883
884 /* How many end-of-memory variables you have, grandma! */
885 /* need this before calling reserve_initrd */
886 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
887 max_low_pfn = e820_end_of_low_ram_pfn();
888 else
889 max_low_pfn = max_pfn;
890
891 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
892 #endif
893
894 /*
895 * Find and reserve possible boot-time SMP configuration:
896 */
897 find_smp_config();
898
899 reserve_ibft_region();
900
901 /*
902 * Need to conclude brk, before memblock_x86_fill()
903 * it could use memblock_find_in_range, could overlap with
904 * brk area.
905 */
906 reserve_brk();
907
908 cleanup_highmap();
909
910 memblock.current_limit = get_max_mapped();
911 memblock_x86_fill();
912
913 /*
914 * The EFI specification says that boot service code won't be called
915 * after ExitBootServices(). This is, in fact, a lie.
916 */
917 if (efi_enabled)
918 efi_reserve_boot_services();
919
920 /* preallocate 4k for mptable mpc */
921 early_reserve_e820_mpc_new();
922
923 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
924 setup_bios_corruption_check();
925 #endif
926
927 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
928 max_pfn_mapped<<PAGE_SHIFT);
929
930 setup_trampolines();
931
932 init_gbpages();
933
934 /* max_pfn_mapped is updated here */
935 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
936 max_pfn_mapped = max_low_pfn_mapped;
937
938 #ifdef CONFIG_X86_64
939 if (max_pfn > max_low_pfn) {
940 max_pfn_mapped = init_memory_mapping(1UL<<32,
941 max_pfn<<PAGE_SHIFT);
942 /* can we preseve max_low_pfn ?*/
943 max_low_pfn = max_pfn;
944 }
945 #endif
946 memblock.current_limit = get_max_mapped();
947
948 /*
949 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
950 */
951
952 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
953 if (init_ohci1394_dma_early)
954 init_ohci1394_dma_on_all_controllers();
955 #endif
956 /* Allocate bigger log buffer */
957 setup_log_buf(1);
958
959 reserve_initrd();
960
961 reserve_crashkernel();
962
963 vsmp_init();
964
965 io_delay_init();
966
967 /*
968 * Parse the ACPI tables for possible boot-time SMP configuration.
969 */
970 acpi_boot_table_init();
971
972 early_acpi_boot_init();
973
974 initmem_init();
975 memblock_find_dma_reserve();
976
977 #ifdef CONFIG_KVM_CLOCK
978 kvmclock_init();
979 #endif
980
981 x86_init.paging.pagetable_setup_start(swapper_pg_dir);
982 paging_init();
983 x86_init.paging.pagetable_setup_done(swapper_pg_dir);
984
985 if (boot_cpu_data.cpuid_level >= 0) {
986 /* A CPU has %cr4 if and only if it has CPUID */
987 mmu_cr4_features = read_cr4();
988 }
989
990 #ifdef CONFIG_X86_32
991 /* sync back kernel address range */
992 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
993 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
994 KERNEL_PGD_PTRS);
995 #endif
996
997 tboot_probe();
998
999 #ifdef CONFIG_X86_64
1000 map_vsyscall();
1001 #endif
1002
1003 generic_apic_probe();
1004
1005 early_quirks();
1006
1007 /*
1008 * Read APIC and some other early information from ACPI tables.
1009 */
1010 acpi_boot_init();
1011 sfi_init();
1012 x86_dtb_init();
1013
1014 /*
1015 * get boot-time SMP configuration:
1016 */
1017 if (smp_found_config)
1018 get_smp_config();
1019
1020 prefill_possible_map();
1021
1022 init_cpu_to_node();
1023
1024 init_apic_mappings();
1025 ioapic_and_gsi_init();
1026
1027 kvm_guest_init();
1028
1029 e820_reserve_resources();
1030 e820_mark_nosave_regions(max_low_pfn);
1031
1032 x86_init.resources.reserve_resources();
1033
1034 e820_setup_gap();
1035
1036 #ifdef CONFIG_VT
1037 #if defined(CONFIG_VGA_CONSOLE)
1038 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1039 conswitchp = &vga_con;
1040 #elif defined(CONFIG_DUMMY_CONSOLE)
1041 conswitchp = &dummy_con;
1042 #endif
1043 #endif
1044 x86_init.oem.banner();
1045
1046 x86_init.timers.wallclock_init();
1047
1048 x86_platform.wallclock_init();
1049
1050 mcheck_init();
1051
1052 arch_init_ideal_nops();
1053 }
1054
1055 #ifdef CONFIG_X86_32
1056
1057 static struct resource video_ram_resource = {
1058 .name = "Video RAM area",
1059 .start = 0xa0000,
1060 .end = 0xbffff,
1061 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1062 };
1063
1064 void __init i386_reserve_resources(void)
1065 {
1066 request_resource(&iomem_resource, &video_ram_resource);
1067 reserve_standard_io_resources();
1068 }
1069
1070 #endif /* CONFIG_X86_32 */
kernel source for telekom puls (alcatel/mediatek)