2 * linux/arch/i386/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
6 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
8 * Memory region support
9 * David Parsons <orc@pell.chi.il.us>, July-August 1999
11 * Added E820 sanitization routine (removes overlapping memory regions);
12 * Brian Moyle <bmoyle@mvista.com>, February 2001
14 * Moved CPU detection code to cpu/${cpu}.c
15 * Patrick Mochel <mochel@osdl.org>, March 2002
17 * Provisions for empty E820 memory regions (reported by certain BIOSes).
18 * Alex Achenbach <xela@slit.de>, December 2002.
23 * This file handles the architecture-dependent parts of initialization
26 #include <linux/sched.h>
28 #include <linux/mmzone.h>
29 #include <linux/screen_info.h>
30 #include <linux/ioport.h>
31 #include <linux/acpi.h>
32 #include <linux/apm_bios.h>
33 #include <linux/initrd.h>
34 #include <linux/bootmem.h>
35 #include <linux/seq_file.h>
36 #include <linux/platform_device.h>
37 #include <linux/console.h>
38 #include <linux/mca.h>
39 #include <linux/root_dev.h>
40 #include <linux/highmem.h>
41 #include <linux/module.h>
42 #include <linux/efi.h>
43 #include <linux/init.h>
44 #include <linux/edd.h>
45 #include <linux/nodemask.h>
46 #include <linux/kexec.h>
47 #include <linux/crash_dump.h>
48 #include <linux/dmi.h>
49 #include <linux/pfn.h>
51 #include <video/edid.h>
55 #include <asm/mpspec.h>
56 #include <asm/mmzone.h>
57 #include <asm/setup.h>
58 #include <asm/arch_hooks.h>
59 #include <asm/sections.h>
60 #include <asm/io_apic.h>
63 #include <setup_arch.h>
64 #include <bios_ebda.h>
66 /* Forward Declaration. */
67 void __init find_max_pfn(void);
69 /* This value is set up by the early boot code to point to the value
70 immediately after the boot time page tables. It contains a *physical*
71 address, and must not be in the .bss segment! */
72 unsigned long init_pg_tables_end __initdata = ~0UL;
74 int disable_pse __devinitdata = 0;
79 extern struct e820map e820;
80 extern struct resource code_resource;
81 extern struct resource data_resource;
83 /* cpu data as detected by the assembly code in head.S */
84 struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
85 /* common cpu data for all cpus */
86 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
87 EXPORT_SYMBOL(boot_cpu_data);
89 unsigned long mmu_cr4_features;
91 /* for MCA, but anyone else can use it if they want */
92 unsigned int machine_id;
94 EXPORT_SYMBOL(machine_id);
96 unsigned int machine_submodel_id;
97 unsigned int BIOS_revision;
98 unsigned int mca_pentium_flag;
100 /* For PCI or other memory-mapped resources */
101 unsigned long pci_mem_start = 0x10000000;
103 EXPORT_SYMBOL(pci_mem_start);
106 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
109 /* user-defined highmem size */
110 static unsigned int highmem_pages = -1;
115 struct drive_info_struct { char dummy[32]; } drive_info;
116 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \
117 defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
118 EXPORT_SYMBOL(drive_info);
120 struct screen_info screen_info;
121 EXPORT_SYMBOL(screen_info);
122 struct apm_info apm_info;
123 EXPORT_SYMBOL(apm_info);
124 struct sys_desc_table_struct {
125 unsigned short length;
126 unsigned char table[0];
128 struct edid_info edid_info;
129 EXPORT_SYMBOL_GPL(edid_info);
130 struct ist_info ist_info;
131 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
132 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
133 EXPORT_SYMBOL(ist_info);
136 extern void early_cpu_init(void);
137 extern int root_mountflags;
139 unsigned long saved_videomode;
141 #define RAMDISK_IMAGE_START_MASK 0x07FF
142 #define RAMDISK_PROMPT_FLAG 0x8000
143 #define RAMDISK_LOAD_FLAG 0x4000
145 static char command_line[COMMAND_LINE_SIZE];
147 unsigned char __initdata boot_params[PARAM_SIZE];
149 static void __init limit_regions(unsigned long long size)
151 unsigned long long current_addr = 0;
155 efi_memory_desc_t *md;
158 for (p = memmap.map, i = 0; p < memmap.map_end;
159 p += memmap.desc_size, i++) {
161 current_addr = md->phys_addr + (md->num_pages << 12);
162 if (md->type == EFI_CONVENTIONAL_MEMORY) {
163 if (current_addr >= size) {
165 (((current_addr-size) + PAGE_SIZE-1) >> PAGE_SHIFT);
166 memmap.nr_map = i + 1;
172 for (i = 0; i < e820.nr_map; i++) {
173 current_addr = e820.map[i].addr + e820.map[i].size;
174 if (current_addr < size)
177 if (e820.map[i].type != E820_RAM)
180 if (e820.map[i].addr >= size) {
182 * This region starts past the end of the
183 * requested size, skip it completely.
188 e820.map[i].size -= current_addr - size;
196 static void __init print_memory_map(char *who)
200 for (i = 0; i < e820.nr_map; i++) {
201 printk(" %s: %016Lx - %016Lx ", who,
203 e820.map[i].addr + e820.map[i].size);
204 switch (e820.map[i].type) {
205 case E820_RAM: printk("(usable)\n");
208 printk("(reserved)\n");
211 printk("(ACPI data)\n");
214 printk("(ACPI NVS)\n");
216 default: printk("type %lu\n", e820.map[i].type);
222 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
224 #ifdef CONFIG_EDD_MODULE
228 * copy_edd() - Copy the BIOS EDD information
229 * from boot_params into a safe place.
232 static inline void copy_edd(void)
234 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
235 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
236 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
237 edd.edd_info_nr = EDD_NR;
240 static inline void copy_edd(void)
245 static int __initdata user_defined_memmap = 0;
248 * "mem=nopentium" disables the 4MB page tables.
249 * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
250 * to <mem>, overriding the bios size.
251 * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
252 * <start> to <start>+<mem>, overriding the bios size.
254 * HPA tells me bootloaders need to parse mem=, so no new
255 * option should be mem= [also see Documentation/i386/boot.txt]
257 static int __init parse_mem(char *arg)
262 if (strcmp(arg, "nopentium") == 0) {
263 clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
266 /* If the user specifies memory size, we
267 * limit the BIOS-provided memory map to
268 * that size. exactmap can be used to specify
269 * the exact map. mem=number can be used to
270 * trim the existing memory map.
272 unsigned long long mem_size;
274 mem_size = memparse(arg, &arg);
275 limit_regions(mem_size);
276 user_defined_memmap = 1;
280 early_param("mem", parse_mem);
282 static int __init parse_memmap(char *arg)
287 if (strcmp(arg, "exactmap") == 0) {
288 #ifdef CONFIG_CRASH_DUMP
289 /* If we are doing a crash dump, we
290 * still need to know the real mem
291 * size before original memory map is
295 saved_max_pfn = max_pfn;
298 user_defined_memmap = 1;
300 /* If the user specifies memory size, we
301 * limit the BIOS-provided memory map to
302 * that size. exactmap can be used to specify
303 * the exact map. mem=number can be used to
304 * trim the existing memory map.
306 unsigned long long start_at, mem_size;
308 mem_size = memparse(arg, &arg);
310 start_at = memparse(arg+1, &arg);
311 add_memory_region(start_at, mem_size, E820_RAM);
312 } else if (*arg == '#') {
313 start_at = memparse(arg+1, &arg);
314 add_memory_region(start_at, mem_size, E820_ACPI);
315 } else if (*arg == '$') {
316 start_at = memparse(arg+1, &arg);
317 add_memory_region(start_at, mem_size, E820_RESERVED);
319 limit_regions(mem_size);
320 user_defined_memmap = 1;
325 early_param("memmap", parse_memmap);
327 #ifdef CONFIG_PROC_VMCORE
328 /* elfcorehdr= specifies the location of elf core header
329 * stored by the crashed kernel.
331 static int __init parse_elfcorehdr(char *arg)
336 elfcorehdr_addr = memparse(arg, &arg);
339 early_param("elfcorehdr", parse_elfcorehdr);
340 #endif /* CONFIG_PROC_VMCORE */
343 * highmem=size forces highmem to be exactly 'size' bytes.
344 * This works even on boxes that have no highmem otherwise.
345 * This also works to reduce highmem size on bigger boxes.
347 static int __init parse_highmem(char *arg)
352 highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
355 early_param("highmem", parse_highmem);
358 * vmalloc=size forces the vmalloc area to be exactly 'size'
359 * bytes. This can be used to increase (or decrease) the
360 * vmalloc area - the default is 128m.
362 static int __init parse_vmalloc(char *arg)
367 __VMALLOC_RESERVE = memparse(arg, &arg);
370 early_param("vmalloc", parse_vmalloc);
373 * reservetop=size reserves a hole at the top of the kernel address space which
374 * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
375 * so relocating the fixmap can be done before paging initialization.
377 static int __init parse_reservetop(char *arg)
379 unsigned long address;
384 address = memparse(arg, &arg);
385 reserve_top_address(address);
388 early_param("reservetop", parse_reservetop);
391 * Callback for efi_memory_walk.
394 efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
396 unsigned long *max_pfn = arg, pfn;
399 pfn = PFN_UP(end -1);
407 efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
409 memory_present(0, PFN_UP(start), PFN_DOWN(end));
414 * This function checks if the entire range <start,end> is mapped with type.
416 * Note: this function only works correct if the e820 table is sorted and
417 * not-overlapping, which is the case
420 e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
425 for (i = 0; i < e820.nr_map; i++) {
426 struct e820entry *ei = &e820.map[i];
427 if (type && ei->type != type)
429 /* is the region (part) in overlap with the current region ?*/
430 if (ei->addr >= end || ei->addr + ei->size <= start)
432 /* if the region is at the beginning of <start,end> we move
433 * start to the end of the region since it's ok until there
435 if (ei->addr <= start)
436 start = ei->addr + ei->size;
437 /* if start is now at or beyond end, we're done, full
440 return 1; /* we're done */
446 * Find the highest page frame number we have available
448 void __init find_max_pfn(void)
454 efi_memmap_walk(efi_find_max_pfn, &max_pfn);
455 efi_memmap_walk(efi_memory_present_wrapper, NULL);
459 for (i = 0; i < e820.nr_map; i++) {
460 unsigned long start, end;
462 if (e820.map[i].type != E820_RAM)
464 start = PFN_UP(e820.map[i].addr);
465 end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
470 memory_present(0, start, end);
475 * Determine low and high memory ranges:
477 unsigned long __init find_max_low_pfn(void)
479 unsigned long max_low_pfn;
481 max_low_pfn = max_pfn;
482 if (max_low_pfn > MAXMEM_PFN) {
483 if (highmem_pages == -1)
484 highmem_pages = max_pfn - MAXMEM_PFN;
485 if (highmem_pages + MAXMEM_PFN < max_pfn)
486 max_pfn = MAXMEM_PFN + highmem_pages;
487 if (highmem_pages + MAXMEM_PFN > max_pfn) {
488 printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
491 max_low_pfn = MAXMEM_PFN;
492 #ifndef CONFIG_HIGHMEM
493 /* Maximum memory usable is what is directly addressable */
494 printk(KERN_WARNING "Warning only %ldMB will be used.\n",
496 if (max_pfn > MAX_NONPAE_PFN)
497 printk(KERN_WARNING "Use a PAE enabled kernel.\n");
499 printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
500 max_pfn = MAXMEM_PFN;
501 #else /* !CONFIG_HIGHMEM */
502 #ifndef CONFIG_X86_PAE
503 if (max_pfn > MAX_NONPAE_PFN) {
504 max_pfn = MAX_NONPAE_PFN;
505 printk(KERN_WARNING "Warning only 4GB will be used.\n");
506 printk(KERN_WARNING "Use a PAE enabled kernel.\n");
508 #endif /* !CONFIG_X86_PAE */
509 #endif /* !CONFIG_HIGHMEM */
511 if (highmem_pages == -1)
513 #ifdef CONFIG_HIGHMEM
514 if (highmem_pages >= max_pfn) {
515 printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
519 if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
520 printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
523 max_low_pfn -= highmem_pages;
527 printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
534 * Free all available memory for boot time allocation. Used
535 * as a callback function by efi_memory_walk()
539 free_available_memory(unsigned long start, unsigned long end, void *arg)
541 /* check max_low_pfn */
542 if (start >= (max_low_pfn << PAGE_SHIFT))
544 if (end >= (max_low_pfn << PAGE_SHIFT))
545 end = max_low_pfn << PAGE_SHIFT;
547 free_bootmem(start, end - start);
552 * Register fully available low RAM pages with the bootmem allocator.
554 static void __init register_bootmem_low_pages(unsigned long max_low_pfn)
559 efi_memmap_walk(free_available_memory, NULL);
562 for (i = 0; i < e820.nr_map; i++) {
563 unsigned long curr_pfn, last_pfn, size;
565 * Reserve usable low memory
567 if (e820.map[i].type != E820_RAM)
570 * We are rounding up the start address of usable memory:
572 curr_pfn = PFN_UP(e820.map[i].addr);
573 if (curr_pfn >= max_low_pfn)
576 * ... and at the end of the usable range downwards:
578 last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
580 if (last_pfn > max_low_pfn)
581 last_pfn = max_low_pfn;
584 * .. finally, did all the rounding and playing
585 * around just make the area go away?
587 if (last_pfn <= curr_pfn)
590 size = last_pfn - curr_pfn;
591 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
596 * workaround for Dell systems that neglect to reserve EBDA
598 static void __init reserve_ebda_region(void)
601 addr = get_bios_ebda();
603 reserve_bootmem(addr, PAGE_SIZE);
606 #ifndef CONFIG_NEED_MULTIPLE_NODES
607 void __init setup_bootmem_allocator(void);
608 static unsigned long __init setup_memory(void)
611 * partially used pages are not usable - thus
612 * we are rounding upwards:
614 min_low_pfn = PFN_UP(init_pg_tables_end);
618 max_low_pfn = find_max_low_pfn();
620 #ifdef CONFIG_HIGHMEM
621 highstart_pfn = highend_pfn = max_pfn;
622 if (max_pfn > max_low_pfn) {
623 highstart_pfn = max_low_pfn;
625 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
626 pages_to_mb(highend_pfn - highstart_pfn));
627 num_physpages = highend_pfn;
628 high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
630 num_physpages = max_low_pfn;
631 high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
633 #ifdef CONFIG_FLATMEM
634 max_mapnr = num_physpages;
636 printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
637 pages_to_mb(max_low_pfn));
639 setup_bootmem_allocator();
644 void __init zone_sizes_init(void)
646 unsigned long max_zone_pfns[MAX_NR_ZONES];
647 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
648 max_zone_pfns[ZONE_DMA] =
649 virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
650 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
651 #ifdef CONFIG_HIGHMEM
652 max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
653 add_active_range(0, 0, highend_pfn);
655 add_active_range(0, 0, max_low_pfn);
658 free_area_init_nodes(max_zone_pfns);
661 extern unsigned long __init setup_memory(void);
662 extern void zone_sizes_init(void);
663 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
665 void __init setup_bootmem_allocator(void)
667 unsigned long bootmap_size;
669 * Initialize the boot-time allocator (with low memory only):
671 bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
673 register_bootmem_low_pages(max_low_pfn);
676 * Reserve the bootmem bitmap itself as well. We do this in two
677 * steps (first step was init_bootmem()) because this catches
678 * the (very unlikely) case of us accidentally initializing the
679 * bootmem allocator with an invalid RAM area.
681 reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
682 bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
685 * reserve physical page 0 - it's a special BIOS page on many boxes,
686 * enabling clean reboots, SMP operation, laptop functions.
688 reserve_bootmem(0, PAGE_SIZE);
690 /* reserve EBDA region, it's a 4K region */
691 reserve_ebda_region();
693 /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
694 PCI prefetch into it (errata #56). Usually the page is reserved anyways,
695 unless you have no PS/2 mouse plugged in. */
696 if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
697 boot_cpu_data.x86 == 6)
698 reserve_bootmem(0xa0000 - 4096, 4096);
702 * But first pinch a few for the stack/trampoline stuff
703 * FIXME: Don't need the extra page at 4K, but need to fix
704 * trampoline before removing it. (see the GDT stuff)
706 reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
708 #ifdef CONFIG_ACPI_SLEEP
710 * Reserve low memory region for sleep support.
712 acpi_reserve_bootmem();
714 #ifdef CONFIG_X86_FIND_SMP_CONFIG
716 * Find and reserve possible boot-time SMP configuration:
721 #ifdef CONFIG_BLK_DEV_INITRD
722 if (LOADER_TYPE && INITRD_START) {
723 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
724 reserve_bootmem(INITRD_START, INITRD_SIZE);
726 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
727 initrd_end = initrd_start+INITRD_SIZE;
730 printk(KERN_ERR "initrd extends beyond end of memory "
731 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
732 INITRD_START + INITRD_SIZE,
733 max_low_pfn << PAGE_SHIFT);
739 if (crashk_res.start != crashk_res.end)
740 reserve_bootmem(crashk_res.start,
741 crashk_res.end - crashk_res.start + 1);
746 * The node 0 pgdat is initialized before all of these because
747 * it's needed for bootmem. node>0 pgdats have their virtual
748 * space allocated before the pagetables are in place to access
749 * them, so they can't be cleared then.
751 * This should all compile down to nothing when NUMA is off.
753 void __init remapped_pgdat_init(void)
757 for_each_online_node(nid) {
759 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
765 static void __init register_memory(void)
767 unsigned long gapstart, gapsize, round;
768 unsigned long long last;
772 * Search for the bigest gap in the low 32 bits of the e820
775 last = 0x100000000ull;
776 gapstart = 0x10000000;
780 unsigned long long start = e820.map[i].addr;
781 unsigned long long end = start + e820.map[i].size;
784 * Since "last" is at most 4GB, we know we'll
785 * fit in 32 bits if this condition is true
788 unsigned long gap = last - end;
800 * See how much we want to round up: start off with
801 * rounding to the next 1MB area.
804 while ((gapsize >> 4) > round)
806 /* Fun with two's complement */
807 pci_mem_start = (gapstart + round) & -round;
809 printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
810 pci_mem_start, gapstart, gapsize);
814 static void set_mca_bus(int x)
819 static void set_mca_bus(int x) { }
823 * Determine if we were loaded by an EFI loader. If so, then we have also been
824 * passed the efi memmap, systab, etc., so we should use these data structures
825 * for initialization. Note, the efi init code path is determined by the
826 * global efi_enabled. This allows the same kernel image to be used on existing
827 * systems (with a traditional BIOS) as well as on EFI systems.
829 void __init setup_arch(char **cmdline_p)
831 unsigned long max_low_pfn;
833 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
834 pre_setup_arch_hook();
838 * FIXME: This isn't an official loader_type right
839 * now but does currently work with elilo.
840 * If we were configured as an EFI kernel, check to make
841 * sure that we were loaded correctly from elilo and that
842 * the system table is valid. If not, then initialize normally.
845 if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
849 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
850 drive_info = DRIVE_INFO;
851 screen_info = SCREEN_INFO;
852 edid_info = EDID_INFO;
853 apm_info.bios = APM_BIOS_INFO;
855 saved_videomode = VIDEO_MODE;
856 if( SYS_DESC_TABLE.length != 0 ) {
857 set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
858 machine_id = SYS_DESC_TABLE.table[0];
859 machine_submodel_id = SYS_DESC_TABLE.table[1];
860 BIOS_revision = SYS_DESC_TABLE.table[2];
862 bootloader_type = LOADER_TYPE;
864 #ifdef CONFIG_BLK_DEV_RAM
865 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
866 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
867 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
873 printk(KERN_INFO "BIOS-provided physical RAM map:\n");
874 print_memory_map(machine_specific_memory_setup());
879 if (!MOUNT_ROOT_RDONLY)
880 root_mountflags &= ~MS_RDONLY;
881 init_mm.start_code = (unsigned long) _text;
882 init_mm.end_code = (unsigned long) _etext;
883 init_mm.end_data = (unsigned long) _edata;
884 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
886 code_resource.start = virt_to_phys(_text);
887 code_resource.end = virt_to_phys(_etext)-1;
888 data_resource.start = virt_to_phys(_etext);
889 data_resource.end = virt_to_phys(_edata)-1;
893 if (user_defined_memmap) {
894 printk(KERN_INFO "user-defined physical RAM map:\n");
895 print_memory_map("user");
898 strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
899 *cmdline_p = command_line;
901 max_low_pfn = setup_memory();
904 * NOTE: before this point _nobody_ is allowed to allocate
905 * any memory using the bootmem allocator. Although the
906 * alloctor is now initialised only the first 8Mb of the kernel
907 * virtual address space has been mapped. All allocations before
908 * paging_init() has completed must use the alloc_bootmem_low_pages()
909 * variant (which allocates DMA'able memory) and care must be taken
910 * not to exceed the 8Mb limit.
914 smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
917 remapped_pgdat_init();
922 * NOTE: at this point the bootmem allocator is fully available.
927 #ifdef CONFIG_X86_GENERICARCH
928 generic_apic_probe();
935 * Parse the ACPI tables for possible boot-time SMP configuration.
937 acpi_boot_table_init();
941 #ifdef CONFIG_X86_IO_APIC
942 check_acpi_pci(); /* Checks more than just ACPI actually */
949 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
951 printk(KERN_WARNING "More than 8 CPUs detected and "
952 "CONFIG_X86_PC cannot handle it.\nUse "
953 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
956 #ifdef CONFIG_X86_LOCAL_APIC
957 if (smp_found_config)
964 #if defined(CONFIG_VGA_CONSOLE)
965 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
966 conswitchp = &vga_con;
967 #elif defined(CONFIG_DUMMY_CONSOLE)
968 conswitchp = &dummy_con;
974 static __init int add_pcspkr(void)
976 struct platform_device *pd;
979 pd = platform_device_alloc("pcspkr", -1);
983 ret = platform_device_add(pd);
985 platform_device_put(pd);
989 device_initcall(add_pcspkr);