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/nodemask.h>
43 #include <linux/kexec.h>
44 #include <linux/crash_dump.h>
45 #include <linux/dmi.h>
46 #include <linux/pfn.h>
47 #include <linux/pci.h>
49 #include <video/edid.h>
54 #include <asm/mpspec.h>
55 #include <asm/mmzone.h>
56 #include <asm/setup.h>
57 #include <asm/arch_hooks.h>
58 #include <asm/sections.h>
59 #include <asm/io_apic.h>
63 #include <setup_arch.h>
64 #include <bios_ebda.h>
65 #include <asm/cacheflush.h>
67 /* This value is set up by the early boot code to point to the value
68 immediately after the boot time page tables. It contains a *physical*
69 address, and must not be in the .bss segment! */
70 unsigned long init_pg_tables_end __initdata = ~0UL;
75 static struct resource data_resource = {
76 .name = "Kernel data",
79 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
82 static struct resource code_resource = {
83 .name = "Kernel code",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
89 static struct resource bss_resource = {
93 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
96 static struct resource video_ram_resource = {
97 .name = "Video RAM area",
100 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
103 static struct resource standard_io_resources[] = { {
107 .flags = IORESOURCE_BUSY | IORESOURCE_IO
112 .flags = IORESOURCE_BUSY | IORESOURCE_IO
117 .flags = IORESOURCE_BUSY | IORESOURCE_IO
122 .flags = IORESOURCE_BUSY | IORESOURCE_IO
127 .flags = IORESOURCE_BUSY | IORESOURCE_IO
129 .name = "dma page reg",
132 .flags = IORESOURCE_BUSY | IORESOURCE_IO
137 .flags = IORESOURCE_BUSY | IORESOURCE_IO
142 .flags = IORESOURCE_BUSY | IORESOURCE_IO
147 .flags = IORESOURCE_BUSY | IORESOURCE_IO
150 /* cpu data as detected by the assembly code in head.S */
151 struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
152 /* common cpu data for all cpus */
153 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
154 EXPORT_SYMBOL(boot_cpu_data);
156 unsigned long mmu_cr4_features;
158 /* for MCA, but anyone else can use it if they want */
159 unsigned int machine_id;
160 unsigned int machine_submodel_id;
161 unsigned int BIOS_revision;
162 unsigned int mca_pentium_flag;
164 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
167 /* user-defined highmem size */
168 static unsigned int highmem_pages = -1;
173 struct screen_info screen_info;
174 EXPORT_SYMBOL(screen_info);
175 struct apm_info apm_info;
176 EXPORT_SYMBOL(apm_info);
177 struct edid_info edid_info;
178 EXPORT_SYMBOL_GPL(edid_info);
179 struct ist_info ist_info;
180 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
181 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
182 EXPORT_SYMBOL(ist_info);
185 extern void early_cpu_init(void);
186 extern int root_mountflags;
188 unsigned long saved_videomode;
190 #define RAMDISK_IMAGE_START_MASK 0x07FF
191 #define RAMDISK_PROMPT_FLAG 0x8000
192 #define RAMDISK_LOAD_FLAG 0x4000
194 static char __initdata command_line[COMMAND_LINE_SIZE];
196 #ifndef CONFIG_DEBUG_BOOT_PARAMS
197 struct boot_params __initdata boot_params;
199 struct boot_params boot_params;
202 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
204 #ifdef CONFIG_EDD_MODULE
208 * copy_edd() - Copy the BIOS EDD information
209 * from boot_params into a safe place.
212 static inline void copy_edd(void)
214 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
215 sizeof(edd.mbr_signature));
216 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
217 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
218 edd.edd_info_nr = boot_params.eddbuf_entries;
221 static inline void copy_edd(void)
226 int __initdata user_defined_memmap = 0;
229 * "mem=nopentium" disables the 4MB page tables.
230 * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
231 * to <mem>, overriding the bios size.
232 * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
233 * <start> to <start>+<mem>, overriding the bios size.
235 * HPA tells me bootloaders need to parse mem=, so no new
236 * option should be mem= [also see Documentation/i386/boot.txt]
238 static int __init parse_mem(char *arg)
243 if (strcmp(arg, "nopentium") == 0) {
244 setup_clear_cpu_cap(X86_FEATURE_PSE);
246 /* If the user specifies memory size, we
247 * limit the BIOS-provided memory map to
248 * that size. exactmap can be used to specify
249 * the exact map. mem=number can be used to
250 * trim the existing memory map.
252 unsigned long long mem_size;
254 mem_size = memparse(arg, &arg);
255 limit_regions(mem_size);
256 user_defined_memmap = 1;
260 early_param("mem", parse_mem);
262 #ifdef CONFIG_PROC_VMCORE
263 /* elfcorehdr= specifies the location of elf core header
264 * stored by the crashed kernel.
266 static int __init parse_elfcorehdr(char *arg)
271 elfcorehdr_addr = memparse(arg, &arg);
274 early_param("elfcorehdr", parse_elfcorehdr);
275 #endif /* CONFIG_PROC_VMCORE */
278 * highmem=size forces highmem to be exactly 'size' bytes.
279 * This works even on boxes that have no highmem otherwise.
280 * This also works to reduce highmem size on bigger boxes.
282 static int __init parse_highmem(char *arg)
287 highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
290 early_param("highmem", parse_highmem);
293 * vmalloc=size forces the vmalloc area to be exactly 'size'
294 * bytes. This can be used to increase (or decrease) the
295 * vmalloc area - the default is 128m.
297 static int __init parse_vmalloc(char *arg)
302 __VMALLOC_RESERVE = memparse(arg, &arg);
305 early_param("vmalloc", parse_vmalloc);
308 * reservetop=size reserves a hole at the top of the kernel address space which
309 * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
310 * so relocating the fixmap can be done before paging initialization.
312 static int __init parse_reservetop(char *arg)
314 unsigned long address;
319 address = memparse(arg, &arg);
320 reserve_top_address(address);
323 early_param("reservetop", parse_reservetop);
326 * Determine low and high memory ranges:
328 unsigned long __init find_max_low_pfn(void)
330 unsigned long max_low_pfn;
332 max_low_pfn = max_pfn;
333 if (max_low_pfn > MAXMEM_PFN) {
334 if (highmem_pages == -1)
335 highmem_pages = max_pfn - MAXMEM_PFN;
336 if (highmem_pages + MAXMEM_PFN < max_pfn)
337 max_pfn = MAXMEM_PFN + highmem_pages;
338 if (highmem_pages + MAXMEM_PFN > max_pfn) {
339 printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
342 max_low_pfn = MAXMEM_PFN;
343 #ifndef CONFIG_HIGHMEM
344 /* Maximum memory usable is what is directly addressable */
345 printk(KERN_WARNING "Warning only %ldMB will be used.\n",
347 if (max_pfn > MAX_NONPAE_PFN)
348 printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
350 printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
351 max_pfn = MAXMEM_PFN;
352 #else /* !CONFIG_HIGHMEM */
353 #ifndef CONFIG_HIGHMEM64G
354 if (max_pfn > MAX_NONPAE_PFN) {
355 max_pfn = MAX_NONPAE_PFN;
356 printk(KERN_WARNING "Warning only 4GB will be used.\n");
357 printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
359 #endif /* !CONFIG_HIGHMEM64G */
360 #endif /* !CONFIG_HIGHMEM */
362 if (highmem_pages == -1)
364 #ifdef CONFIG_HIGHMEM
365 if (highmem_pages >= max_pfn) {
366 printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
370 if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
371 printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
374 max_low_pfn -= highmem_pages;
378 printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
385 * workaround for Dell systems that neglect to reserve EBDA
387 static void __init reserve_ebda_region(void)
390 addr = get_bios_ebda();
392 reserve_bootmem(addr, PAGE_SIZE);
395 #ifndef CONFIG_NEED_MULTIPLE_NODES
396 void __init setup_bootmem_allocator(void);
397 static unsigned long __init setup_memory(void)
400 * partially used pages are not usable - thus
401 * we are rounding upwards:
403 min_low_pfn = PFN_UP(init_pg_tables_end);
407 max_low_pfn = find_max_low_pfn();
409 #ifdef CONFIG_HIGHMEM
410 highstart_pfn = highend_pfn = max_pfn;
411 if (max_pfn > max_low_pfn) {
412 highstart_pfn = max_low_pfn;
414 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
415 pages_to_mb(highend_pfn - highstart_pfn));
416 num_physpages = highend_pfn;
417 high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
419 num_physpages = max_low_pfn;
420 high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
422 #ifdef CONFIG_FLATMEM
423 max_mapnr = num_physpages;
425 printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
426 pages_to_mb(max_low_pfn));
428 setup_bootmem_allocator();
433 void __init zone_sizes_init(void)
435 unsigned long max_zone_pfns[MAX_NR_ZONES];
436 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
437 max_zone_pfns[ZONE_DMA] =
438 virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
439 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
440 #ifdef CONFIG_HIGHMEM
441 max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
442 add_active_range(0, 0, highend_pfn);
444 add_active_range(0, 0, max_low_pfn);
447 free_area_init_nodes(max_zone_pfns);
450 extern unsigned long __init setup_memory(void);
451 extern void zone_sizes_init(void);
452 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
454 static inline unsigned long long get_total_mem(void)
456 unsigned long long total;
458 total = max_low_pfn - min_low_pfn;
459 #ifdef CONFIG_HIGHMEM
460 total += highend_pfn - highstart_pfn;
463 return total << PAGE_SHIFT;
467 static void __init reserve_crashkernel(void)
469 unsigned long long total_mem;
470 unsigned long long crash_size, crash_base;
473 total_mem = get_total_mem();
475 ret = parse_crashkernel(boot_command_line, total_mem,
476 &crash_size, &crash_base);
477 if (ret == 0 && crash_size > 0) {
478 if (crash_base > 0) {
479 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
480 "for crashkernel (System RAM: %ldMB)\n",
481 (unsigned long)(crash_size >> 20),
482 (unsigned long)(crash_base >> 20),
483 (unsigned long)(total_mem >> 20));
484 crashk_res.start = crash_base;
485 crashk_res.end = crash_base + crash_size - 1;
486 reserve_bootmem(crash_base, crash_size);
488 printk(KERN_INFO "crashkernel reservation failed - "
489 "you have to specify a base address\n");
493 static inline void __init reserve_crashkernel(void)
497 #ifdef CONFIG_BLK_DEV_INITRD
499 static bool do_relocate_initrd = false;
501 static void __init reserve_initrd(void)
503 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
504 unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
505 unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
506 unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
507 unsigned long ramdisk_here;
511 if (!boot_params.hdr.type_of_loader ||
512 !ramdisk_image || !ramdisk_size)
513 return; /* No initrd provided by bootloader */
515 if (ramdisk_end < ramdisk_image) {
516 printk(KERN_ERR "initrd wraps around end of memory, "
517 "disabling initrd\n");
520 if (ramdisk_size >= end_of_lowmem/2) {
521 printk(KERN_ERR "initrd too large to handle, "
522 "disabling initrd\n");
525 if (ramdisk_end <= end_of_lowmem) {
526 /* All in lowmem, easy case */
527 reserve_bootmem(ramdisk_image, ramdisk_size);
528 initrd_start = ramdisk_image + PAGE_OFFSET;
529 initrd_end = initrd_start+ramdisk_size;
533 /* We need to move the initrd down into lowmem */
534 ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK;
536 /* Note: this includes all the lowmem currently occupied by
537 the initrd, we rely on that fact to keep the data intact. */
538 reserve_bootmem(ramdisk_here, ramdisk_size);
539 initrd_start = ramdisk_here + PAGE_OFFSET;
540 initrd_end = initrd_start + ramdisk_size;
542 do_relocate_initrd = true;
545 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
547 static void __init relocate_initrd(void)
549 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
550 unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
551 unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
552 unsigned long ramdisk_here;
553 unsigned long slop, clen, mapaddr;
556 if (!do_relocate_initrd)
559 ramdisk_here = initrd_start - PAGE_OFFSET;
561 q = (char *)initrd_start;
563 /* Copy any lowmem portion of the initrd */
564 if (ramdisk_image < end_of_lowmem) {
565 clen = end_of_lowmem - ramdisk_image;
566 p = (char *)__va(ramdisk_image);
569 ramdisk_image += clen;
570 ramdisk_size -= clen;
573 /* Copy the highmem portion of the initrd */
574 while (ramdisk_size) {
575 slop = ramdisk_image & ~PAGE_MASK;
577 if (clen > MAX_MAP_CHUNK-slop)
578 clen = MAX_MAP_CHUNK-slop;
579 mapaddr = ramdisk_image & PAGE_MASK;
580 p = early_ioremap(mapaddr, clen+slop);
581 memcpy(q, p+slop, clen);
582 early_iounmap(p, clen+slop);
584 ramdisk_image += clen;
585 ramdisk_size -= clen;
589 #endif /* CONFIG_BLK_DEV_INITRD */
591 void __init setup_bootmem_allocator(void)
593 unsigned long bootmap_size;
595 * Initialize the boot-time allocator (with low memory only):
597 bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
599 register_bootmem_low_pages(max_low_pfn);
602 * Reserve the bootmem bitmap itself as well. We do this in two
603 * steps (first step was init_bootmem()) because this catches
604 * the (very unlikely) case of us accidentally initializing the
605 * bootmem allocator with an invalid RAM area.
607 reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
608 bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
611 * reserve physical page 0 - it's a special BIOS page on many boxes,
612 * enabling clean reboots, SMP operation, laptop functions.
614 reserve_bootmem(0, PAGE_SIZE);
616 /* reserve EBDA region, it's a 4K region */
617 reserve_ebda_region();
619 /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
620 PCI prefetch into it (errata #56). Usually the page is reserved anyways,
621 unless you have no PS/2 mouse plugged in. */
622 if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
623 boot_cpu_data.x86 == 6)
624 reserve_bootmem(0xa0000 - 4096, 4096);
628 * But first pinch a few for the stack/trampoline stuff
629 * FIXME: Don't need the extra page at 4K, but need to fix
630 * trampoline before removing it. (see the GDT stuff)
632 reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
634 #ifdef CONFIG_ACPI_SLEEP
636 * Reserve low memory region for sleep support.
638 acpi_reserve_bootmem();
640 #ifdef CONFIG_X86_FIND_SMP_CONFIG
642 * Find and reserve possible boot-time SMP configuration:
646 #ifdef CONFIG_BLK_DEV_INITRD
650 reserve_crashkernel();
654 * The node 0 pgdat is initialized before all of these because
655 * it's needed for bootmem. node>0 pgdats have their virtual
656 * space allocated before the pagetables are in place to access
657 * them, so they can't be cleared then.
659 * This should all compile down to nothing when NUMA is off.
661 static void __init remapped_pgdat_init(void)
665 for_each_online_node(nid) {
667 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
672 static void set_mca_bus(int x)
677 static void set_mca_bus(int x) { }
680 /* Overridden in paravirt.c if CONFIG_PARAVIRT */
681 char * __init __attribute__((weak)) memory_setup(void)
683 return machine_specific_memory_setup();
687 * Determine if we were loaded by an EFI loader. If so, then we have also been
688 * passed the efi memmap, systab, etc., so we should use these data structures
689 * for initialization. Note, the efi init code path is determined by the
690 * global efi_enabled. This allows the same kernel image to be used on existing
691 * systems (with a traditional BIOS) as well as on EFI systems.
693 void __init setup_arch(char **cmdline_p)
695 unsigned long max_low_pfn;
697 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
698 pre_setup_arch_hook();
700 early_ioremap_init();
703 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
708 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
709 screen_info = boot_params.screen_info;
710 edid_info = boot_params.edid_info;
711 apm_info.bios = boot_params.apm_bios_info;
712 ist_info = boot_params.ist_info;
713 saved_videomode = boot_params.hdr.vid_mode;
714 if( boot_params.sys_desc_table.length != 0 ) {
715 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
716 machine_id = boot_params.sys_desc_table.table[0];
717 machine_submodel_id = boot_params.sys_desc_table.table[1];
718 BIOS_revision = boot_params.sys_desc_table.table[2];
720 bootloader_type = boot_params.hdr.type_of_loader;
722 #ifdef CONFIG_BLK_DEV_RAM
723 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
724 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
725 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
729 printk(KERN_INFO "BIOS-provided physical RAM map:\n");
730 print_memory_map(memory_setup());
734 if (!boot_params.hdr.root_flags)
735 root_mountflags &= ~MS_RDONLY;
736 init_mm.start_code = (unsigned long) _text;
737 init_mm.end_code = (unsigned long) _etext;
738 init_mm.end_data = (unsigned long) _edata;
739 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
741 code_resource.start = virt_to_phys(_text);
742 code_resource.end = virt_to_phys(_etext)-1;
743 data_resource.start = virt_to_phys(_etext);
744 data_resource.end = virt_to_phys(_edata)-1;
745 bss_resource.start = virt_to_phys(&__bss_start);
746 bss_resource.end = virt_to_phys(&__bss_stop)-1;
750 if (user_defined_memmap) {
751 printk(KERN_INFO "user-defined physical RAM map:\n");
752 print_memory_map("user");
755 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
756 *cmdline_p = command_line;
761 max_low_pfn = setup_memory();
763 /* update e820 for memory not covered by WB MTRRs */
765 if (mtrr_trim_uncached_memory(max_pfn))
766 max_low_pfn = setup_memory();
770 * Must be after max_low_pfn is determined, and before kernel
771 * pagetables are setup.
777 * NOTE: before this point _nobody_ is allowed to allocate
778 * any memory using the bootmem allocator. Although the
779 * allocator is now initialised only the first 8Mb of the kernel
780 * virtual address space has been mapped. All allocations before
781 * paging_init() has completed must use the alloc_bootmem_low_pages()
782 * variant (which allocates DMA'able memory) and care must be taken
783 * not to exceed the 8Mb limit.
787 smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
790 remapped_pgdat_init();
795 * NOTE: at this point the bootmem allocator is fully available.
798 #ifdef CONFIG_BLK_DEV_INITRD
802 paravirt_post_allocator_init();
808 #ifdef CONFIG_X86_GENERICARCH
809 generic_apic_probe();
816 * Parse the ACPI tables for possible boot-time SMP configuration.
818 acpi_boot_table_init();
826 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
828 printk(KERN_WARNING "More than 8 CPUs detected and "
829 "CONFIG_X86_PC cannot handle it.\nUse "
830 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
833 #ifdef CONFIG_X86_LOCAL_APIC
834 if (smp_found_config)
838 e820_register_memory();
839 e820_mark_nosave_regions();
842 #if defined(CONFIG_VGA_CONSOLE)
843 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
844 conswitchp = &vga_con;
845 #elif defined(CONFIG_DUMMY_CONSOLE)
846 conswitchp = &dummy_con;
852 * Request address space for all standard resources
854 * This is called just before pcibios_init(), which is also a
855 * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
857 static int __init request_standard_resources(void)
861 printk(KERN_INFO "Setting up standard PCI resources\n");
862 init_iomem_resources(&code_resource, &data_resource, &bss_resource);
864 request_resource(&iomem_resource, &video_ram_resource);
866 /* request I/O space for devices used on all i[345]86 PCs */
867 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
868 request_resource(&ioport_resource, &standard_io_resources[i]);
872 subsys_initcall(request_standard_resources);