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>
53 #include <asm/mpspec.h>
54 #include <asm/mmzone.h>
55 #include <asm/setup.h>
56 #include <asm/arch_hooks.h>
57 #include <asm/sections.h>
58 #include <asm/io_apic.h>
62 #include <setup_arch.h>
63 #include <bios_ebda.h>
64 #include <asm/cacheflush.h>
66 /* This value is set up by the early boot code to point to the value
67 immediately after the boot time page tables. It contains a *physical*
68 address, and must not be in the .bss segment! */
69 unsigned long init_pg_tables_end __initdata = ~0UL;
74 static struct resource data_resource = {
75 .name = "Kernel data",
78 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
81 static struct resource code_resource = {
82 .name = "Kernel code",
85 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
88 static struct resource bss_resource = {
92 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
95 static struct resource video_ram_resource = {
96 .name = "Video RAM area",
99 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
102 static struct resource standard_io_resources[] = { {
106 .flags = IORESOURCE_BUSY | IORESOURCE_IO
111 .flags = IORESOURCE_BUSY | IORESOURCE_IO
116 .flags = IORESOURCE_BUSY | IORESOURCE_IO
121 .flags = IORESOURCE_BUSY | IORESOURCE_IO
126 .flags = IORESOURCE_BUSY | IORESOURCE_IO
128 .name = "dma page reg",
131 .flags = IORESOURCE_BUSY | IORESOURCE_IO
136 .flags = IORESOURCE_BUSY | IORESOURCE_IO
141 .flags = IORESOURCE_BUSY | IORESOURCE_IO
146 .flags = IORESOURCE_BUSY | IORESOURCE_IO
149 /* cpu data as detected by the assembly code in head.S */
150 struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
151 /* common cpu data for all cpus */
152 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
153 EXPORT_SYMBOL(boot_cpu_data);
155 unsigned long mmu_cr4_features;
157 /* for MCA, but anyone else can use it if they want */
158 unsigned int machine_id;
159 unsigned int machine_submodel_id;
160 unsigned int BIOS_revision;
161 unsigned int mca_pentium_flag;
163 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
166 /* user-defined highmem size */
167 static unsigned int highmem_pages = -1;
172 struct screen_info screen_info;
173 EXPORT_SYMBOL(screen_info);
174 struct apm_info apm_info;
175 EXPORT_SYMBOL(apm_info);
176 struct edid_info edid_info;
177 EXPORT_SYMBOL_GPL(edid_info);
178 struct ist_info ist_info;
179 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
180 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
181 EXPORT_SYMBOL(ist_info);
184 extern void early_cpu_init(void);
185 extern int root_mountflags;
187 unsigned long saved_videomode;
189 #define RAMDISK_IMAGE_START_MASK 0x07FF
190 #define RAMDISK_PROMPT_FLAG 0x8000
191 #define RAMDISK_LOAD_FLAG 0x4000
193 static char __initdata command_line[COMMAND_LINE_SIZE];
195 #ifndef CONFIG_DEBUG_BOOT_PARAMS
196 struct boot_params __initdata boot_params;
198 struct boot_params boot_params;
201 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
203 #ifdef CONFIG_EDD_MODULE
207 * copy_edd() - Copy the BIOS EDD information
208 * from boot_params into a safe place.
211 static inline void copy_edd(void)
213 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
214 sizeof(edd.mbr_signature));
215 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
216 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
217 edd.edd_info_nr = boot_params.eddbuf_entries;
220 static inline void copy_edd(void)
225 int __initdata user_defined_memmap = 0;
228 * "mem=nopentium" disables the 4MB page tables.
229 * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
230 * to <mem>, overriding the bios size.
231 * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
232 * <start> to <start>+<mem>, overriding the bios size.
234 * HPA tells me bootloaders need to parse mem=, so no new
235 * option should be mem= [also see Documentation/i386/boot.txt]
237 static int __init parse_mem(char *arg)
242 if (strcmp(arg, "nopentium") == 0) {
243 setup_clear_cpu_cap(X86_FEATURE_PSE);
245 /* If the user specifies memory size, we
246 * limit the BIOS-provided memory map to
247 * that size. exactmap can be used to specify
248 * the exact map. mem=number can be used to
249 * trim the existing memory map.
251 unsigned long long mem_size;
253 mem_size = memparse(arg, &arg);
254 limit_regions(mem_size);
255 user_defined_memmap = 1;
259 early_param("mem", parse_mem);
261 #ifdef CONFIG_PROC_VMCORE
262 /* elfcorehdr= specifies the location of elf core header
263 * stored by the crashed kernel.
265 static int __init parse_elfcorehdr(char *arg)
270 elfcorehdr_addr = memparse(arg, &arg);
273 early_param("elfcorehdr", parse_elfcorehdr);
274 #endif /* CONFIG_PROC_VMCORE */
277 * highmem=size forces highmem to be exactly 'size' bytes.
278 * This works even on boxes that have no highmem otherwise.
279 * This also works to reduce highmem size on bigger boxes.
281 static int __init parse_highmem(char *arg)
286 highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
289 early_param("highmem", parse_highmem);
292 * vmalloc=size forces the vmalloc area to be exactly 'size'
293 * bytes. This can be used to increase (or decrease) the
294 * vmalloc area - the default is 128m.
296 static int __init parse_vmalloc(char *arg)
301 __VMALLOC_RESERVE = memparse(arg, &arg);
304 early_param("vmalloc", parse_vmalloc);
307 * reservetop=size reserves a hole at the top of the kernel address space which
308 * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
309 * so relocating the fixmap can be done before paging initialization.
311 static int __init parse_reservetop(char *arg)
313 unsigned long address;
318 address = memparse(arg, &arg);
319 reserve_top_address(address);
322 early_param("reservetop", parse_reservetop);
325 * Determine low and high memory ranges:
327 unsigned long __init find_max_low_pfn(void)
329 unsigned long max_low_pfn;
331 max_low_pfn = max_pfn;
332 if (max_low_pfn > MAXMEM_PFN) {
333 if (highmem_pages == -1)
334 highmem_pages = max_pfn - MAXMEM_PFN;
335 if (highmem_pages + MAXMEM_PFN < max_pfn)
336 max_pfn = MAXMEM_PFN + highmem_pages;
337 if (highmem_pages + MAXMEM_PFN > max_pfn) {
338 printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
341 max_low_pfn = MAXMEM_PFN;
342 #ifndef CONFIG_HIGHMEM
343 /* Maximum memory usable is what is directly addressable */
344 printk(KERN_WARNING "Warning only %ldMB will be used.\n",
346 if (max_pfn > MAX_NONPAE_PFN)
347 printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
349 printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
350 max_pfn = MAXMEM_PFN;
351 #else /* !CONFIG_HIGHMEM */
352 #ifndef CONFIG_HIGHMEM64G
353 if (max_pfn > MAX_NONPAE_PFN) {
354 max_pfn = MAX_NONPAE_PFN;
355 printk(KERN_WARNING "Warning only 4GB will be used.\n");
356 printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
358 #endif /* !CONFIG_HIGHMEM64G */
359 #endif /* !CONFIG_HIGHMEM */
361 if (highmem_pages == -1)
363 #ifdef CONFIG_HIGHMEM
364 if (highmem_pages >= max_pfn) {
365 printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
369 if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
370 printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
373 max_low_pfn -= highmem_pages;
377 printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
384 * workaround for Dell systems that neglect to reserve EBDA
386 static void __init reserve_ebda_region(void)
389 addr = get_bios_ebda();
391 reserve_bootmem(addr, PAGE_SIZE);
394 #ifndef CONFIG_NEED_MULTIPLE_NODES
395 void __init setup_bootmem_allocator(void);
396 static unsigned long __init setup_memory(void)
399 * partially used pages are not usable - thus
400 * we are rounding upwards:
402 min_low_pfn = PFN_UP(init_pg_tables_end);
406 max_low_pfn = find_max_low_pfn();
408 #ifdef CONFIG_HIGHMEM
409 highstart_pfn = highend_pfn = max_pfn;
410 if (max_pfn > max_low_pfn) {
411 highstart_pfn = max_low_pfn;
413 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
414 pages_to_mb(highend_pfn - highstart_pfn));
415 num_physpages = highend_pfn;
416 high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
418 num_physpages = max_low_pfn;
419 high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
421 #ifdef CONFIG_FLATMEM
422 max_mapnr = num_physpages;
424 printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
425 pages_to_mb(max_low_pfn));
427 setup_bootmem_allocator();
432 void __init zone_sizes_init(void)
434 unsigned long max_zone_pfns[MAX_NR_ZONES];
435 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
436 max_zone_pfns[ZONE_DMA] =
437 virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
438 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
439 #ifdef CONFIG_HIGHMEM
440 max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
441 add_active_range(0, 0, highend_pfn);
443 add_active_range(0, 0, max_low_pfn);
446 free_area_init_nodes(max_zone_pfns);
449 extern unsigned long __init setup_memory(void);
450 extern void zone_sizes_init(void);
451 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
453 static inline unsigned long long get_total_mem(void)
455 unsigned long long total;
457 total = max_low_pfn - min_low_pfn;
458 #ifdef CONFIG_HIGHMEM
459 total += highend_pfn - highstart_pfn;
462 return total << PAGE_SHIFT;
466 static void __init reserve_crashkernel(void)
468 unsigned long long total_mem;
469 unsigned long long crash_size, crash_base;
472 total_mem = get_total_mem();
474 ret = parse_crashkernel(boot_command_line, total_mem,
475 &crash_size, &crash_base);
476 if (ret == 0 && crash_size > 0) {
477 if (crash_base > 0) {
478 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
479 "for crashkernel (System RAM: %ldMB)\n",
480 (unsigned long)(crash_size >> 20),
481 (unsigned long)(crash_base >> 20),
482 (unsigned long)(total_mem >> 20));
483 crashk_res.start = crash_base;
484 crashk_res.end = crash_base + crash_size - 1;
485 reserve_bootmem(crash_base, crash_size);
487 printk(KERN_INFO "crashkernel reservation failed - "
488 "you have to specify a base address\n");
492 static inline void __init reserve_crashkernel(void)
496 #ifdef CONFIG_BLK_DEV_INITRD
498 static bool do_relocate_initrd = false;
500 static void __init reserve_initrd(void)
502 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
503 unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
504 unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
505 unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
506 unsigned long ramdisk_here;
510 if (!boot_params.hdr.type_of_loader ||
511 !ramdisk_image || !ramdisk_size)
512 return; /* No initrd provided by bootloader */
514 if (ramdisk_end < ramdisk_image) {
515 printk(KERN_ERR "initrd wraps around end of memory, "
516 "disabling initrd\n");
519 if (ramdisk_size >= end_of_lowmem/2) {
520 printk(KERN_ERR "initrd too large to handle, "
521 "disabling initrd\n");
524 if (ramdisk_end <= end_of_lowmem) {
525 /* All in lowmem, easy case */
526 reserve_bootmem(ramdisk_image, ramdisk_size);
527 initrd_start = ramdisk_image + PAGE_OFFSET;
528 initrd_end = initrd_start+ramdisk_size;
532 /* We need to move the initrd down into lowmem */
533 ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK;
535 /* Note: this includes all the lowmem currently occupied by
536 the initrd, we rely on that fact to keep the data intact. */
537 reserve_bootmem(ramdisk_here, ramdisk_size);
538 initrd_start = ramdisk_here + PAGE_OFFSET;
539 initrd_end = initrd_start + ramdisk_size;
541 do_relocate_initrd = true;
544 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
546 static void __init relocate_initrd(void)
548 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
549 unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
550 unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
551 unsigned long ramdisk_here;
552 unsigned long slop, clen, mapaddr;
555 if (!do_relocate_initrd)
558 ramdisk_here = initrd_start - PAGE_OFFSET;
560 q = (char *)initrd_start;
562 /* Copy any lowmem portion of the initrd */
563 if (ramdisk_image < end_of_lowmem) {
564 clen = end_of_lowmem - ramdisk_image;
565 p = (char *)__va(ramdisk_image);
568 ramdisk_image += clen;
569 ramdisk_size -= clen;
572 /* Copy the highmem portion of the initrd */
573 while (ramdisk_size) {
574 slop = ramdisk_image & ~PAGE_MASK;
576 if (clen > MAX_MAP_CHUNK-slop)
577 clen = MAX_MAP_CHUNK-slop;
578 mapaddr = ramdisk_image & PAGE_MASK;
579 p = bt_ioremap(mapaddr, clen+slop);
580 memcpy(q, p+slop, clen);
581 bt_iounmap(p, clen+slop);
583 ramdisk_image += clen;
584 ramdisk_size -= clen;
588 #endif /* CONFIG_BLK_DEV_INITRD */
590 void __init setup_bootmem_allocator(void)
592 unsigned long bootmap_size;
594 * Initialize the boot-time allocator (with low memory only):
596 bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
598 register_bootmem_low_pages(max_low_pfn);
601 * Reserve the bootmem bitmap itself as well. We do this in two
602 * steps (first step was init_bootmem()) because this catches
603 * the (very unlikely) case of us accidentally initializing the
604 * bootmem allocator with an invalid RAM area.
606 reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
607 bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
610 * reserve physical page 0 - it's a special BIOS page on many boxes,
611 * enabling clean reboots, SMP operation, laptop functions.
613 reserve_bootmem(0, PAGE_SIZE);
615 /* reserve EBDA region, it's a 4K region */
616 reserve_ebda_region();
618 /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
619 PCI prefetch into it (errata #56). Usually the page is reserved anyways,
620 unless you have no PS/2 mouse plugged in. */
621 if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
622 boot_cpu_data.x86 == 6)
623 reserve_bootmem(0xa0000 - 4096, 4096);
627 * But first pinch a few for the stack/trampoline stuff
628 * FIXME: Don't need the extra page at 4K, but need to fix
629 * trampoline before removing it. (see the GDT stuff)
631 reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
633 #ifdef CONFIG_ACPI_SLEEP
635 * Reserve low memory region for sleep support.
637 acpi_reserve_bootmem();
639 #ifdef CONFIG_X86_FIND_SMP_CONFIG
641 * Find and reserve possible boot-time SMP configuration:
645 #ifdef CONFIG_BLK_DEV_INITRD
649 reserve_crashkernel();
653 * The node 0 pgdat is initialized before all of these because
654 * it's needed for bootmem. node>0 pgdats have their virtual
655 * space allocated before the pagetables are in place to access
656 * them, so they can't be cleared then.
658 * This should all compile down to nothing when NUMA is off.
660 static void __init remapped_pgdat_init(void)
664 for_each_online_node(nid) {
666 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
671 static void set_mca_bus(int x)
676 static void set_mca_bus(int x) { }
679 /* Overridden in paravirt.c if CONFIG_PARAVIRT */
680 char * __init __attribute__((weak)) memory_setup(void)
682 return machine_specific_memory_setup();
686 * Determine if we were loaded by an EFI loader. If so, then we have also been
687 * passed the efi memmap, systab, etc., so we should use these data structures
688 * for initialization. Note, the efi init code path is determined by the
689 * global efi_enabled. This allows the same kernel image to be used on existing
690 * systems (with a traditional BIOS) as well as on EFI systems.
692 void __init setup_arch(char **cmdline_p)
694 unsigned long max_low_pfn;
696 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
697 pre_setup_arch_hook();
701 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
706 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
707 screen_info = boot_params.screen_info;
708 edid_info = boot_params.edid_info;
709 apm_info.bios = boot_params.apm_bios_info;
710 ist_info = boot_params.ist_info;
711 saved_videomode = boot_params.hdr.vid_mode;
712 if( boot_params.sys_desc_table.length != 0 ) {
713 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
714 machine_id = boot_params.sys_desc_table.table[0];
715 machine_submodel_id = boot_params.sys_desc_table.table[1];
716 BIOS_revision = boot_params.sys_desc_table.table[2];
718 bootloader_type = boot_params.hdr.type_of_loader;
720 #ifdef CONFIG_BLK_DEV_RAM
721 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
722 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
723 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
727 printk(KERN_INFO "BIOS-provided physical RAM map:\n");
728 print_memory_map(memory_setup());
732 if (!boot_params.hdr.root_flags)
733 root_mountflags &= ~MS_RDONLY;
734 init_mm.start_code = (unsigned long) _text;
735 init_mm.end_code = (unsigned long) _etext;
736 init_mm.end_data = (unsigned long) _edata;
737 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
739 code_resource.start = virt_to_phys(_text);
740 code_resource.end = virt_to_phys(_etext)-1;
741 data_resource.start = virt_to_phys(_etext);
742 data_resource.end = virt_to_phys(_edata)-1;
743 bss_resource.start = virt_to_phys(&__bss_start);
744 bss_resource.end = virt_to_phys(&__bss_stop)-1;
748 if (user_defined_memmap) {
749 printk(KERN_INFO "user-defined physical RAM map:\n");
750 print_memory_map("user");
753 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
754 *cmdline_p = command_line;
759 max_low_pfn = setup_memory();
763 * Must be after max_low_pfn is determined, and before kernel
764 * pagetables are setup.
770 * NOTE: before this point _nobody_ is allowed to allocate
771 * any memory using the bootmem allocator. Although the
772 * allocator is now initialised only the first 8Mb of the kernel
773 * virtual address space has been mapped. All allocations before
774 * paging_init() has completed must use the alloc_bootmem_low_pages()
775 * variant (which allocates DMA'able memory) and care must be taken
776 * not to exceed the 8Mb limit.
780 smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
783 remapped_pgdat_init();
788 * NOTE: at this point the bootmem allocator is fully available.
791 #ifdef CONFIG_BLK_DEV_INITRD
795 paravirt_post_allocator_init();
801 #ifdef CONFIG_X86_GENERICARCH
802 generic_apic_probe();
809 * Parse the ACPI tables for possible boot-time SMP configuration.
811 acpi_boot_table_init();
819 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
821 printk(KERN_WARNING "More than 8 CPUs detected and "
822 "CONFIG_X86_PC cannot handle it.\nUse "
823 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
826 #ifdef CONFIG_X86_LOCAL_APIC
827 if (smp_found_config)
831 e820_register_memory();
832 e820_mark_nosave_regions();
835 #if defined(CONFIG_VGA_CONSOLE)
836 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
837 conswitchp = &vga_con;
838 #elif defined(CONFIG_DUMMY_CONSOLE)
839 conswitchp = &dummy_con;
845 * Request address space for all standard resources
847 * This is called just before pcibios_init(), which is also a
848 * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
850 static int __init request_standard_resources(void)
854 printk(KERN_INFO "Setting up standard PCI resources\n");
855 init_iomem_resources(&code_resource, &data_resource, &bss_resource);
857 request_resource(&iomem_resource, &video_ram_resource);
859 /* request I/O space for devices used on all i[345]86 PCs */
860 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
861 request_resource(&ioport_resource, &standard_io_resources[i]);
865 subsys_initcall(request_standard_resources);