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);