2 * Copyright (C) 1995 Linus Torvalds
4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
6 * Memory region support
7 * David Parsons <orc@pell.chi.il.us>, July-August 1999
9 * Added E820 sanitization routine (removes overlapping memory regions);
10 * Brian Moyle <bmoyle@mvista.com>, February 2001
12 * Moved CPU detection code to cpu/${cpu}.c
13 * Patrick Mochel <mochel@osdl.org>, March 2002
15 * Provisions for empty E820 memory regions (reported by certain BIOSes).
16 * Alex Achenbach <xela@slit.de>, December 2002.
21 * This file handles the architecture-dependent parts of initialization
24 #include <linux/sched.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/apm_bios.h>
31 #include <linux/initrd.h>
32 #include <linux/bootmem.h>
33 #include <linux/seq_file.h>
34 #include <linux/console.h>
35 #include <linux/mca.h>
36 #include <linux/root_dev.h>
37 #include <linux/highmem.h>
38 #include <linux/module.h>
39 #include <linux/efi.h>
40 #include <linux/init.h>
41 #include <linux/edd.h>
42 #include <linux/iscsi_ibft.h>
43 #include <linux/nodemask.h>
44 #include <linux/kexec.h>
45 #include <linux/crash_dump.h>
46 #include <linux/dmi.h>
47 #include <linux/pfn.h>
48 #include <linux/pci.h>
49 #include <linux/init_ohci1394_dma.h>
50 #include <linux/kvm_para.h>
52 #include <video/edid.h>
57 #include <asm/mpspec.h>
58 #include <asm/mmzone.h>
59 #include <asm/setup.h>
60 #include <asm/arch_hooks.h>
61 #include <asm/sections.h>
62 #include <asm/io_apic.h>
66 #include <setup_arch.h>
67 #include <asm/bios_ebda.h>
68 #include <asm/cacheflush.h>
69 #include <asm/processor.h>
71 /* This value is set up by the early boot code to point to the value
72 immediately after the boot time page tables. It contains a *physical*
73 address, and must not be in the .bss segment! */
74 unsigned long init_pg_tables_end __initdata
= ~0UL;
79 static struct resource data_resource
= {
80 .name
= "Kernel data",
83 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
86 static struct resource code_resource
= {
87 .name
= "Kernel code",
90 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
93 static struct resource bss_resource
= {
97 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
100 static struct resource video_ram_resource
= {
101 .name
= "Video RAM area",
104 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
107 static struct resource standard_io_resources
[] = { {
111 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
116 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
121 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
126 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
131 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
136 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
138 .name
= "dma page reg",
141 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
146 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
151 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
156 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
159 /* cpu data as detected by the assembly code in head.S */
160 struct cpuinfo_x86 new_cpu_data __cpuinitdata
= { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
161 /* common cpu data for all cpus */
162 struct cpuinfo_x86 boot_cpu_data __read_mostly
= { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
163 EXPORT_SYMBOL(boot_cpu_data
);
165 unsigned int def_to_bigsmp
;
167 #ifndef CONFIG_X86_PAE
168 unsigned long mmu_cr4_features
;
170 unsigned long mmu_cr4_features
= X86_CR4_PAE
;
173 /* for MCA, but anyone else can use it if they want */
174 unsigned int machine_id
;
175 unsigned int machine_submodel_id
;
176 unsigned int BIOS_revision
;
178 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
181 /* user-defined highmem size */
182 static unsigned int highmem_pages
= -1;
187 struct screen_info screen_info
;
188 EXPORT_SYMBOL(screen_info
);
189 struct apm_info apm_info
;
190 EXPORT_SYMBOL(apm_info
);
191 struct edid_info edid_info
;
192 EXPORT_SYMBOL_GPL(edid_info
);
193 struct ist_info ist_info
;
194 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
195 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
196 EXPORT_SYMBOL(ist_info
);
199 extern void early_cpu_init(void);
200 extern int root_mountflags
;
202 unsigned long saved_video_mode
;
204 #define RAMDISK_IMAGE_START_MASK 0x07FF
205 #define RAMDISK_PROMPT_FLAG 0x8000
206 #define RAMDISK_LOAD_FLAG 0x4000
208 static char __initdata command_line
[COMMAND_LINE_SIZE
];
210 #ifndef CONFIG_DEBUG_BOOT_PARAMS
211 struct boot_params __initdata boot_params
;
213 struct boot_params boot_params
;
216 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
218 #ifdef CONFIG_EDD_MODULE
222 * copy_edd() - Copy the BIOS EDD information
223 * from boot_params into a safe place.
226 static inline void copy_edd(void)
228 memcpy(edd
.mbr_signature
, boot_params
.edd_mbr_sig_buffer
,
229 sizeof(edd
.mbr_signature
));
230 memcpy(edd
.edd_info
, boot_params
.eddbuf
, sizeof(edd
.edd_info
));
231 edd
.mbr_signature_nr
= boot_params
.edd_mbr_sig_buf_entries
;
232 edd
.edd_info_nr
= boot_params
.eddbuf_entries
;
235 static inline void copy_edd(void)
240 #ifdef CONFIG_PROC_VMCORE
241 /* elfcorehdr= specifies the location of elf core header
242 * stored by the crashed kernel.
244 static int __init
parse_elfcorehdr(char *arg
)
249 elfcorehdr_addr
= memparse(arg
, &arg
);
252 early_param("elfcorehdr", parse_elfcorehdr
);
253 #endif /* CONFIG_PROC_VMCORE */
256 * highmem=size forces highmem to be exactly 'size' bytes.
257 * This works even on boxes that have no highmem otherwise.
258 * This also works to reduce highmem size on bigger boxes.
260 static int __init
parse_highmem(char *arg
)
265 highmem_pages
= memparse(arg
, &arg
) >> PAGE_SHIFT
;
268 early_param("highmem", parse_highmem
);
271 * vmalloc=size forces the vmalloc area to be exactly 'size'
272 * bytes. This can be used to increase (or decrease) the
273 * vmalloc area - the default is 128m.
275 static int __init
parse_vmalloc(char *arg
)
280 __VMALLOC_RESERVE
= memparse(arg
, &arg
);
283 early_param("vmalloc", parse_vmalloc
);
286 * reservetop=size reserves a hole at the top of the kernel address space which
287 * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
288 * so relocating the fixmap can be done before paging initialization.
290 static int __init
parse_reservetop(char *arg
)
292 unsigned long address
;
297 address
= memparse(arg
, &arg
);
298 reserve_top_address(address
);
301 early_param("reservetop", parse_reservetop
);
304 * Determine low and high memory ranges:
306 unsigned long __init
find_max_low_pfn(void)
308 unsigned long max_low_pfn
;
310 max_low_pfn
= max_pfn
;
311 if (max_low_pfn
> MAXMEM_PFN
) {
312 if (highmem_pages
== -1)
313 highmem_pages
= max_pfn
- MAXMEM_PFN
;
314 if (highmem_pages
+ MAXMEM_PFN
< max_pfn
)
315 max_pfn
= MAXMEM_PFN
+ highmem_pages
;
316 if (highmem_pages
+ MAXMEM_PFN
> max_pfn
) {
317 printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn
- MAXMEM_PFN
), pages_to_mb(highmem_pages
));
320 max_low_pfn
= MAXMEM_PFN
;
321 #ifndef CONFIG_HIGHMEM
322 /* Maximum memory usable is what is directly addressable */
323 printk(KERN_WARNING
"Warning only %ldMB will be used.\n",
325 if (max_pfn
> MAX_NONPAE_PFN
)
326 printk(KERN_WARNING
"Use a HIGHMEM64G enabled kernel.\n");
328 printk(KERN_WARNING
"Use a HIGHMEM enabled kernel.\n");
329 max_pfn
= MAXMEM_PFN
;
330 #else /* !CONFIG_HIGHMEM */
331 #ifndef CONFIG_HIGHMEM64G
332 if (max_pfn
> MAX_NONPAE_PFN
) {
333 max_pfn
= MAX_NONPAE_PFN
;
334 printk(KERN_WARNING
"Warning only 4GB will be used.\n");
335 printk(KERN_WARNING
"Use a HIGHMEM64G enabled kernel.\n");
337 #endif /* !CONFIG_HIGHMEM64G */
338 #endif /* !CONFIG_HIGHMEM */
340 if (highmem_pages
== -1)
342 #ifdef CONFIG_HIGHMEM
343 if (highmem_pages
>= max_pfn
) {
344 printk(KERN_ERR
"highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages
), pages_to_mb(max_pfn
));
348 if (max_low_pfn
-highmem_pages
< 64*1024*1024/PAGE_SIZE
){
349 printk(KERN_ERR
"highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages
));
352 max_low_pfn
-= highmem_pages
;
356 printk(KERN_ERR
"ignoring highmem size on non-highmem kernel!\n");
362 #ifndef CONFIG_NEED_MULTIPLE_NODES
363 static void __init
setup_bootmem_allocator(void);
364 static unsigned long __init
setup_memory(void)
367 * partially used pages are not usable - thus
368 * we are rounding upwards:
370 min_low_pfn
= PFN_UP(init_pg_tables_end
);
372 max_low_pfn
= find_max_low_pfn();
374 #ifdef CONFIG_HIGHMEM
375 highstart_pfn
= highend_pfn
= max_pfn
;
376 if (max_pfn
> max_low_pfn
) {
377 highstart_pfn
= max_low_pfn
;
379 printk(KERN_NOTICE
"%ldMB HIGHMEM available.\n",
380 pages_to_mb(highend_pfn
- highstart_pfn
));
381 num_physpages
= highend_pfn
;
382 high_memory
= (void *) __va(highstart_pfn
* PAGE_SIZE
- 1) + 1;
384 num_physpages
= max_low_pfn
;
385 high_memory
= (void *) __va(max_low_pfn
* PAGE_SIZE
- 1) + 1;
387 #ifdef CONFIG_FLATMEM
388 max_mapnr
= num_physpages
;
390 printk(KERN_NOTICE
"%ldMB LOWMEM available.\n",
391 pages_to_mb(max_low_pfn
));
393 setup_bootmem_allocator();
398 static void __init
zone_sizes_init(void)
400 unsigned long max_zone_pfns
[MAX_NR_ZONES
];
401 memset(max_zone_pfns
, 0, sizeof(max_zone_pfns
));
402 max_zone_pfns
[ZONE_DMA
] =
403 virt_to_phys((char *)MAX_DMA_ADDRESS
) >> PAGE_SHIFT
;
404 max_zone_pfns
[ZONE_NORMAL
] = max_low_pfn
;
405 #ifdef CONFIG_HIGHMEM
406 max_zone_pfns
[ZONE_HIGHMEM
] = highend_pfn
;
407 add_active_range(0, 0, highend_pfn
);
409 add_active_range(0, 0, max_low_pfn
);
412 free_area_init_nodes(max_zone_pfns
);
415 extern unsigned long __init
setup_memory(void);
416 extern void zone_sizes_init(void);
417 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
419 static inline unsigned long long get_total_mem(void)
421 unsigned long long total
;
423 total
= max_low_pfn
- min_low_pfn
;
424 #ifdef CONFIG_HIGHMEM
425 total
+= highend_pfn
- highstart_pfn
;
428 return total
<< PAGE_SHIFT
;
432 static void __init
reserve_crashkernel(void)
434 unsigned long long total_mem
;
435 unsigned long long crash_size
, crash_base
;
438 total_mem
= get_total_mem();
440 ret
= parse_crashkernel(boot_command_line
, total_mem
,
441 &crash_size
, &crash_base
);
442 if (ret
== 0 && crash_size
> 0) {
443 if (crash_base
> 0) {
444 printk(KERN_INFO
"Reserving %ldMB of memory at %ldMB "
445 "for crashkernel (System RAM: %ldMB)\n",
446 (unsigned long)(crash_size
>> 20),
447 (unsigned long)(crash_base
>> 20),
448 (unsigned long)(total_mem
>> 20));
449 crashk_res
.start
= crash_base
;
450 crashk_res
.end
= crash_base
+ crash_size
- 1;
451 reserve_bootmem(crash_base
, crash_size
,
454 printk(KERN_INFO
"crashkernel reservation failed - "
455 "you have to specify a base address\n");
459 static inline void __init
reserve_crashkernel(void)
463 #ifdef CONFIG_BLK_DEV_INITRD
465 static bool do_relocate_initrd
= false;
467 static void __init
reserve_initrd(void)
469 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
470 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
471 u64 ramdisk_end
= ramdisk_image
+ ramdisk_size
;
472 u64 end_of_lowmem
= max_low_pfn
<< PAGE_SHIFT
;
475 if (!boot_params
.hdr
.type_of_loader
||
476 !ramdisk_image
|| !ramdisk_size
)
477 return; /* No initrd provided by bootloader */
481 if (ramdisk_size
>= end_of_lowmem
/2) {
482 free_early(ramdisk_image
, ramdisk_image
+ ramdisk_size
- 1);
483 printk(KERN_ERR
"initrd too large to handle, "
484 "disabling initrd\n");
488 if (ramdisk_end
<= end_of_lowmem
) {
489 /* All in lowmem, easy case */
491 * don't need to reserve again, already reserved early
492 * in i386_start_kernel
494 initrd_start
= ramdisk_image
+ PAGE_OFFSET
;
495 initrd_end
= initrd_start
+ramdisk_size
;
499 /* We need to move the initrd down into lowmem */
500 ramdisk_here
= find_e820_area(min_low_pfn
<<PAGE_SHIFT
,
501 end_of_lowmem
, ramdisk_size
,
504 /* Note: this includes all the lowmem currently occupied by
505 the initrd, we rely on that fact to keep the data intact. */
506 reserve_early(ramdisk_here
, ramdisk_here
+ ramdisk_size
- 1,
508 initrd_start
= ramdisk_here
+ PAGE_OFFSET
;
509 initrd_end
= initrd_start
+ ramdisk_size
;
511 do_relocate_initrd
= true;
514 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
516 static void __init
relocate_initrd(void)
518 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
519 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
520 u64 end_of_lowmem
= max_low_pfn
<< PAGE_SHIFT
;
522 unsigned long slop
, clen
, mapaddr
;
525 if (!do_relocate_initrd
)
528 ramdisk_here
= initrd_start
- PAGE_OFFSET
;
530 q
= (char *)initrd_start
;
532 /* Copy any lowmem portion of the initrd */
533 if (ramdisk_image
< end_of_lowmem
) {
534 clen
= end_of_lowmem
- ramdisk_image
;
535 p
= (char *)__va(ramdisk_image
);
538 /* need to free these low pages...*/
539 printk(KERN_INFO
"Freeing old partial RAMDISK %08llx-%08llx\n",
540 ramdisk_image
, ramdisk_image
+ clen
- 1);
541 free_bootmem(ramdisk_image
, clen
);
542 ramdisk_image
+= clen
;
543 ramdisk_size
-= clen
;
546 /* Copy the highmem portion of the initrd */
547 while (ramdisk_size
) {
548 slop
= ramdisk_image
& ~PAGE_MASK
;
550 if (clen
> MAX_MAP_CHUNK
-slop
)
551 clen
= MAX_MAP_CHUNK
-slop
;
552 mapaddr
= ramdisk_image
& PAGE_MASK
;
553 p
= early_ioremap(mapaddr
, clen
+slop
);
554 memcpy(q
, p
+slop
, clen
);
555 early_iounmap(p
, clen
+slop
);
557 ramdisk_image
+= clen
;
558 ramdisk_size
-= clen
;
560 /* high pages is not converted by early_res_to_bootmem */
561 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
562 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
563 printk(KERN_INFO
"Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n",
564 ramdisk_image
, ramdisk_image
+ ramdisk_size
- 1,
565 ramdisk_here
, ramdisk_here
+ ramdisk_size
- 1);
568 #endif /* CONFIG_BLK_DEV_INITRD */
570 void __init
setup_bootmem_allocator(void)
572 unsigned long bootmap_size
, bootmap
;
574 * Initialize the boot-time allocator (with low memory only):
576 bootmap_size
= bootmem_bootmap_pages(max_low_pfn
)<<PAGE_SHIFT
;
577 bootmap
= find_e820_area(min_low_pfn
<<PAGE_SHIFT
,
578 max_low_pfn
<<PAGE_SHIFT
, bootmap_size
,
581 panic("Cannot find bootmem map of size %ld\n", bootmap_size
);
582 reserve_early(bootmap
, bootmap
+ bootmap_size
- 1, "BOOTMAP");
583 #ifdef CONFIG_BLK_DEV_INITRD
586 bootmap_size
= init_bootmem(bootmap
>> PAGE_SHIFT
, max_low_pfn
);
587 printk(KERN_INFO
" low ram: %08lx - %08lx\n",
588 min_low_pfn
<<PAGE_SHIFT
, max_low_pfn
<<PAGE_SHIFT
);
589 printk(KERN_INFO
" bootmap [%08lx - %08lx]\n",
590 bootmap
, bootmap
+ bootmap_size
- 1);
591 register_bootmem_low_pages(max_low_pfn
);
592 early_res_to_bootmem(0, max_low_pfn
<<PAGE_SHIFT
);
594 #ifdef CONFIG_ACPI_SLEEP
596 * Reserve low memory region for sleep support.
598 acpi_reserve_bootmem();
600 #ifdef CONFIG_X86_FIND_SMP_CONFIG
602 * Find and reserve possible boot-time SMP configuration:
607 reserve_crashkernel();
609 reserve_ibft_region();
613 * The node 0 pgdat is initialized before all of these because
614 * it's needed for bootmem. node>0 pgdats have their virtual
615 * space allocated before the pagetables are in place to access
616 * them, so they can't be cleared then.
618 * This should all compile down to nothing when NUMA is off.
620 static void __init
remapped_pgdat_init(void)
624 for_each_online_node(nid
) {
626 memset(NODE_DATA(nid
), 0, sizeof(struct pglist_data
));
631 static void set_mca_bus(int x
)
636 static void set_mca_bus(int x
) { }
641 * In the golden day, when everything among i386 and x86_64 will be
642 * integrated, this will not live here
644 void *x86_cpu_to_node_map_early_ptr
;
645 int x86_cpu_to_node_map_init
[NR_CPUS
] = {
646 [0 ... NR_CPUS
-1] = NUMA_NO_NODE
648 DEFINE_PER_CPU(int, x86_cpu_to_node_map
) = NUMA_NO_NODE
;
652 * Determine if we were loaded by an EFI loader. If so, then we have also been
653 * passed the efi memmap, systab, etc., so we should use these data structures
654 * for initialization. Note, the efi init code path is determined by the
655 * global efi_enabled. This allows the same kernel image to be used on existing
656 * systems (with a traditional BIOS) as well as on EFI systems.
658 void __init
setup_arch(char **cmdline_p
)
660 unsigned long max_low_pfn
;
662 memcpy(&boot_cpu_data
, &new_cpu_data
, sizeof(new_cpu_data
));
663 pre_setup_arch_hook();
665 early_ioremap_init();
668 if (!strncmp((char *)&boot_params
.efi_info
.efi_loader_signature
,
673 ROOT_DEV
= old_decode_dev(boot_params
.hdr
.root_dev
);
674 screen_info
= boot_params
.screen_info
;
675 edid_info
= boot_params
.edid_info
;
676 apm_info
.bios
= boot_params
.apm_bios_info
;
677 ist_info
= boot_params
.ist_info
;
678 saved_video_mode
= boot_params
.hdr
.vid_mode
;
679 if( boot_params
.sys_desc_table
.length
!= 0 ) {
680 set_mca_bus(boot_params
.sys_desc_table
.table
[3] & 0x2);
681 machine_id
= boot_params
.sys_desc_table
.table
[0];
682 machine_submodel_id
= boot_params
.sys_desc_table
.table
[1];
683 BIOS_revision
= boot_params
.sys_desc_table
.table
[2];
685 bootloader_type
= boot_params
.hdr
.type_of_loader
;
687 #ifdef CONFIG_BLK_DEV_RAM
688 rd_image_start
= boot_params
.hdr
.ram_size
& RAMDISK_IMAGE_START_MASK
;
689 rd_prompt
= ((boot_params
.hdr
.ram_size
& RAMDISK_PROMPT_FLAG
) != 0);
690 rd_doload
= ((boot_params
.hdr
.ram_size
& RAMDISK_LOAD_FLAG
) != 0);
698 if (!boot_params
.hdr
.root_flags
)
699 root_mountflags
&= ~MS_RDONLY
;
700 init_mm
.start_code
= (unsigned long) _text
;
701 init_mm
.end_code
= (unsigned long) _etext
;
702 init_mm
.end_data
= (unsigned long) _edata
;
703 init_mm
.brk
= init_pg_tables_end
+ PAGE_OFFSET
;
705 code_resource
.start
= virt_to_phys(_text
);
706 code_resource
.end
= virt_to_phys(_etext
)-1;
707 data_resource
.start
= virt_to_phys(_etext
);
708 data_resource
.end
= virt_to_phys(_edata
)-1;
709 bss_resource
.start
= virt_to_phys(&__bss_start
);
710 bss_resource
.end
= virt_to_phys(&__bss_stop
)-1;
714 finish_e820_parsing();
716 strlcpy(command_line
, boot_command_line
, COMMAND_LINE_SIZE
);
717 *cmdline_p
= command_line
;
722 /* update e820 for memory not covered by WB MTRRs */
723 propagate_e820_map();
725 if (mtrr_trim_uncached_memory(max_pfn
))
726 propagate_e820_map();
728 max_low_pfn
= setup_memory();
730 #ifdef CONFIG_KVM_CLOCK
736 * Must be after max_low_pfn is determined, and before kernel
737 * pagetables are setup.
744 * NOTE: before this point _nobody_ is allowed to allocate
745 * any memory using the bootmem allocator. Although the
746 * allocator is now initialised only the first 8Mb of the kernel
747 * virtual address space has been mapped. All allocations before
748 * paging_init() has completed must use the alloc_bootmem_low_pages()
749 * variant (which allocates DMA'able memory) and care must be taken
750 * not to exceed the 8Mb limit.
756 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
759 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
760 if (init_ohci1394_dma_early
)
761 init_ohci1394_dma_on_all_controllers();
764 remapped_pgdat_init();
769 * NOTE: at this point the bootmem allocator is fully available.
772 #ifdef CONFIG_BLK_DEV_INITRD
776 paravirt_post_allocator_init();
782 #ifdef CONFIG_X86_SMP
784 * setup to use the early static init tables during kernel startup
785 * X86_SMP will exclude sub-arches that don't deal well with it.
787 x86_cpu_to_apicid_early_ptr
= (void *)x86_cpu_to_apicid_init
;
788 x86_bios_cpu_apicid_early_ptr
= (void *)x86_bios_cpu_apicid_init
;
790 x86_cpu_to_node_map_early_ptr
= (void *)x86_cpu_to_node_map_init
;
794 #ifdef CONFIG_X86_GENERICARCH
795 generic_apic_probe();
800 * Parse the ACPI tables for possible boot-time SMP configuration.
802 acpi_boot_table_init();
810 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
812 printk(KERN_WARNING
"More than 8 CPUs detected and "
813 "CONFIG_X86_PC cannot handle it.\nUse "
814 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
817 #ifdef CONFIG_X86_LOCAL_APIC
818 if (smp_found_config
)
823 e820_mark_nosave_regions();
826 #if defined(CONFIG_VGA_CONSOLE)
827 if (!efi_enabled
|| (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY
))
828 conswitchp
= &vga_con
;
829 #elif defined(CONFIG_DUMMY_CONSOLE)
830 conswitchp
= &dummy_con
;
836 * Request address space for all standard resources
838 * This is called just before pcibios_init(), which is also a
839 * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
841 static int __init
request_standard_resources(void)
845 printk(KERN_INFO
"Setting up standard PCI resources\n");
846 init_iomem_resources(&code_resource
, &data_resource
, &bss_resource
);
848 request_resource(&iomem_resource
, &video_ram_resource
);
850 /* request I/O space for devices used on all i[345]86 PCs */
851 for (i
= 0; i
< ARRAY_SIZE(standard_io_resources
); i
++)
852 request_resource(&ioport_resource
, &standard_io_resources
[i
]);
856 subsys_initcall(request_standard_resources
);