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/sfi.h>
31 #include <linux/apm_bios.h>
32 #include <linux/initrd.h>
33 #include <linux/bootmem.h>
34 #include <linux/seq_file.h>
35 #include <linux/console.h>
36 #include <linux/mca.h>
37 #include <linux/root_dev.h>
38 #include <linux/highmem.h>
39 #include <linux/module.h>
40 #include <linux/efi.h>
41 #include <linux/init.h>
42 #include <linux/edd.h>
43 #include <linux/iscsi_ibft.h>
44 #include <linux/nodemask.h>
45 #include <linux/kexec.h>
46 #include <linux/dmi.h>
47 #include <linux/pfn.h>
48 #include <linux/pci.h>
49 #include <asm/pci-direct.h>
50 #include <linux/init_ohci1394_dma.h>
51 #include <linux/kvm_para.h>
53 #include <linux/errno.h>
54 #include <linux/kernel.h>
55 #include <linux/stddef.h>
56 #include <linux/unistd.h>
57 #include <linux/ptrace.h>
58 #include <linux/user.h>
59 #include <linux/delay.h>
61 #include <linux/kallsyms.h>
62 #include <linux/cpufreq.h>
63 #include <linux/dma-mapping.h>
64 #include <linux/ctype.h>
65 #include <linux/uaccess.h>
67 #include <linux/percpu.h>
68 #include <linux/crash_dump.h>
69 #include <linux/tboot.h>
71 #include <video/edid.h>
75 #include <asm/trampoline.h>
77 #include <asm/mpspec.h>
78 #include <asm/setup.h>
80 #include <asm/timer.h>
81 #include <asm/i8259.h>
82 #include <asm/sections.h>
84 #include <asm/io_apic.h>
87 #include <asm/setup_arch.h>
88 #include <asm/bios_ebda.h>
89 #include <asm/cacheflush.h>
90 #include <asm/processor.h>
93 #include <asm/system.h>
94 #include <asm/vsyscall.h>
98 #include <asm/iommu.h>
100 #include <asm/mmu_context.h>
101 #include <asm/proto.h>
103 #include <asm/paravirt.h>
104 #include <asm/hypervisor.h>
105 #include <asm/olpc_ofw.h>
107 #include <asm/percpu.h>
108 #include <asm/topology.h>
109 #include <asm/apicdef.h>
112 #include <asm/numa_64.h>
115 #include <asm/alternative.h>
118 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
119 * The direct mapping extends to max_pfn_mapped, so that we can directly access
120 * apertures, ACPI and other tables without having to play with fixmaps.
122 unsigned long max_low_pfn_mapped;
123 unsigned long max_pfn_mapped;
126 RESERVE_BRK(dmi_alloc, 65536);
129 unsigned int boot_cpu_id __read_mostly;
131 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
132 unsigned long _brk_end = (unsigned long)__brk_base;
135 int default_cpu_present_to_apicid(int mps_cpu)
137 return __default_cpu_present_to_apicid(mps_cpu);
140 int default_check_phys_apicid_present(int phys_apicid)
142 return __default_check_phys_apicid_present(phys_apicid);
146 #ifndef CONFIG_DEBUG_BOOT_PARAMS
147 struct boot_params __initdata boot_params;
149 struct boot_params boot_params;
155 static struct resource data_resource = {
156 .name = "Kernel data",
159 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
162 static struct resource code_resource = {
163 .name = "Kernel code",
166 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
169 static struct resource bss_resource = {
170 .name = "Kernel bss",
173 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
178 /* cpu data as detected by the assembly code in head.S */
179 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
180 /* common cpu data for all cpus */
181 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
182 EXPORT_SYMBOL(boot_cpu_data);
183 static void set_mca_bus(int x)
190 unsigned int def_to_bigsmp;
192 /* for MCA, but anyone else can use it if they want */
193 unsigned int machine_id;
194 unsigned int machine_submodel_id;
195 unsigned int BIOS_revision;
197 struct apm_info apm_info;
198 EXPORT_SYMBOL(apm_info);
200 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
201 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
202 struct ist_info ist_info;
203 EXPORT_SYMBOL(ist_info);
205 struct ist_info ist_info;
209 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
210 .x86_phys_bits = MAX_PHYSMEM_BITS,
212 EXPORT_SYMBOL(boot_cpu_data);
216 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
217 unsigned long mmu_cr4_features;
219 unsigned long mmu_cr4_features = X86_CR4_PAE;
222 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
223 int bootloader_type, bootloader_version;
228 struct screen_info screen_info;
229 EXPORT_SYMBOL(screen_info);
230 struct edid_info edid_info;
231 EXPORT_SYMBOL_GPL(edid_info);
233 extern int root_mountflags;
235 unsigned long saved_video_mode;
237 #define RAMDISK_IMAGE_START_MASK 0x07FF
238 #define RAMDISK_PROMPT_FLAG 0x8000
239 #define RAMDISK_LOAD_FLAG 0x4000
241 static char __initdata command_line[COMMAND_LINE_SIZE];
242 #ifdef CONFIG_CMDLINE_BOOL
243 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
246 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
248 #ifdef CONFIG_EDD_MODULE
252 * copy_edd() - Copy the BIOS EDD information
253 * from boot_params into a safe place.
256 static inline void __init copy_edd(void)
258 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
259 sizeof(edd.mbr_signature));
260 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
261 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
262 edd.edd_info_nr = boot_params.eddbuf_entries;
265 static inline void __init copy_edd(void)
270 void * __init extend_brk(size_t size, size_t align)
272 size_t mask = align - 1;
275 BUG_ON(_brk_start == 0);
276 BUG_ON(align & mask);
278 _brk_end = (_brk_end + mask) & ~mask;
279 BUG_ON((char *)(_brk_end + size) > __brk_limit);
281 ret = (void *)_brk_end;
284 memset(ret, 0, size);
290 static void __init init_gbpages(void)
292 if (direct_gbpages && cpu_has_gbpages)
293 printk(KERN_INFO "Using GB pages for direct mapping\n");
298 static inline void init_gbpages(void)
303 static void __init reserve_brk(void)
305 if (_brk_end > _brk_start)
306 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK");
308 /* Mark brk area as locked down and no longer taking any
313 #ifdef CONFIG_BLK_DEV_INITRD
315 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
316 static void __init relocate_initrd(void)
318 /* Assume only end is not page aligned */
319 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
320 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
321 u64 area_size = PAGE_ALIGN(ramdisk_size);
322 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
324 unsigned long slop, clen, mapaddr;
327 /* We need to move the initrd down into lowmem */
328 ramdisk_here = find_e820_area(0, end_of_lowmem, area_size,
331 if (ramdisk_here == -1ULL)
332 panic("Cannot find place for new RAMDISK of size %lld\n",
335 /* Note: this includes all the lowmem currently occupied by
336 the initrd, we rely on that fact to keep the data intact. */
337 reserve_early(ramdisk_here, ramdisk_here + area_size,
339 initrd_start = ramdisk_here + PAGE_OFFSET;
340 initrd_end = initrd_start + ramdisk_size;
341 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
342 ramdisk_here, ramdisk_here + ramdisk_size);
344 q = (char *)initrd_start;
346 /* Copy any lowmem portion of the initrd */
347 if (ramdisk_image < end_of_lowmem) {
348 clen = end_of_lowmem - ramdisk_image;
349 p = (char *)__va(ramdisk_image);
352 ramdisk_image += clen;
353 ramdisk_size -= clen;
356 /* Copy the highmem portion of the initrd */
357 while (ramdisk_size) {
358 slop = ramdisk_image & ~PAGE_MASK;
360 if (clen > MAX_MAP_CHUNK-slop)
361 clen = MAX_MAP_CHUNK-slop;
362 mapaddr = ramdisk_image & PAGE_MASK;
363 p = early_memremap(mapaddr, clen+slop);
364 memcpy(q, p+slop, clen);
365 early_iounmap(p, clen+slop);
367 ramdisk_image += clen;
368 ramdisk_size -= clen;
370 /* high pages is not converted by early_res_to_bootmem */
371 ramdisk_image = boot_params.hdr.ramdisk_image;
372 ramdisk_size = boot_params.hdr.ramdisk_size;
373 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
374 " %08llx - %08llx\n",
375 ramdisk_image, ramdisk_image + ramdisk_size - 1,
376 ramdisk_here, ramdisk_here + ramdisk_size - 1);
379 static void __init reserve_initrd(void)
381 /* Assume only end is not page aligned */
382 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
383 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
384 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
385 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
387 if (!boot_params.hdr.type_of_loader ||
388 !ramdisk_image || !ramdisk_size)
389 return; /* No initrd provided by bootloader */
393 if (ramdisk_size >= (end_of_lowmem>>1)) {
394 free_early(ramdisk_image, ramdisk_end);
395 printk(KERN_ERR "initrd too large to handle, "
396 "disabling initrd\n");
400 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
404 if (ramdisk_end <= end_of_lowmem) {
405 /* All in lowmem, easy case */
407 * don't need to reserve again, already reserved early
408 * in i386_start_kernel
410 initrd_start = ramdisk_image + PAGE_OFFSET;
411 initrd_end = initrd_start + ramdisk_size;
417 free_early(ramdisk_image, ramdisk_end);
420 static void __init reserve_initrd(void)
423 #endif /* CONFIG_BLK_DEV_INITRD */
425 static void __init parse_setup_data(void)
427 struct setup_data *data;
430 if (boot_params.hdr.version < 0x0209)
432 pa_data = boot_params.hdr.setup_data;
434 data = early_memremap(pa_data, PAGE_SIZE);
435 switch (data->type) {
437 parse_e820_ext(data, pa_data);
442 pa_data = data->next;
443 early_iounmap(data, PAGE_SIZE);
447 static void __init e820_reserve_setup_data(void)
449 struct setup_data *data;
453 if (boot_params.hdr.version < 0x0209)
455 pa_data = boot_params.hdr.setup_data;
457 data = early_memremap(pa_data, sizeof(*data));
458 e820_update_range(pa_data, sizeof(*data)+data->len,
459 E820_RAM, E820_RESERVED_KERN);
461 pa_data = data->next;
462 early_iounmap(data, sizeof(*data));
467 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
468 memcpy(&e820_saved, &e820, sizeof(struct e820map));
469 printk(KERN_INFO "extended physical RAM map:\n");
470 e820_print_map("reserve setup_data");
473 static void __init reserve_early_setup_data(void)
475 struct setup_data *data;
479 if (boot_params.hdr.version < 0x0209)
481 pa_data = boot_params.hdr.setup_data;
483 data = early_memremap(pa_data, sizeof(*data));
484 sprintf(buf, "setup data %x", data->type);
485 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
486 pa_data = data->next;
487 early_iounmap(data, sizeof(*data));
492 * --------- Crashkernel reservation ------------------------------
497 static inline unsigned long long get_total_mem(void)
499 unsigned long long total;
501 total = max_pfn - min_low_pfn;
503 return total << PAGE_SHIFT;
506 static void __init reserve_crashkernel(void)
508 unsigned long long total_mem;
509 unsigned long long crash_size, crash_base;
512 total_mem = get_total_mem();
514 ret = parse_crashkernel(boot_command_line, total_mem,
515 &crash_size, &crash_base);
516 if (ret != 0 || crash_size <= 0)
519 /* 0 means: find the address automatically */
520 if (crash_base <= 0) {
521 const unsigned long long alignment = 16<<20; /* 16M */
523 crash_base = find_e820_area(alignment, ULONG_MAX, crash_size,
525 if (crash_base == -1ULL) {
526 pr_info("crashkernel reservation failed - No suitable area found.\n");
530 unsigned long long start;
532 start = find_e820_area(crash_base, ULONG_MAX, crash_size,
534 if (start != crash_base) {
535 pr_info("crashkernel reservation failed - memory is in use.\n");
539 reserve_early(crash_base, crash_base + crash_size, "CRASH KERNEL");
541 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
542 "for crashkernel (System RAM: %ldMB)\n",
543 (unsigned long)(crash_size >> 20),
544 (unsigned long)(crash_base >> 20),
545 (unsigned long)(total_mem >> 20));
547 crashk_res.start = crash_base;
548 crashk_res.end = crash_base + crash_size - 1;
549 insert_resource(&iomem_resource, &crashk_res);
552 static void __init reserve_crashkernel(void)
557 static struct resource standard_io_resources[] = {
558 { .name = "dma1", .start = 0x00, .end = 0x1f,
559 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
560 { .name = "pic1", .start = 0x20, .end = 0x21,
561 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
562 { .name = "timer0", .start = 0x40, .end = 0x43,
563 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
564 { .name = "timer1", .start = 0x50, .end = 0x53,
565 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
566 { .name = "keyboard", .start = 0x60, .end = 0x60,
567 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
568 { .name = "keyboard", .start = 0x64, .end = 0x64,
569 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
570 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
571 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
572 { .name = "pic2", .start = 0xa0, .end = 0xa1,
573 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
574 { .name = "dma2", .start = 0xc0, .end = 0xdf,
575 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
576 { .name = "fpu", .start = 0xf0, .end = 0xff,
577 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
580 void __init reserve_standard_io_resources(void)
584 /* request I/O space for devices used on all i[345]86 PCs */
585 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
586 request_resource(&ioport_resource, &standard_io_resources[i]);
591 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
592 * is_kdump_kernel() to determine if we are booting after a panic. Hence
593 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
596 #ifdef CONFIG_CRASH_DUMP
597 /* elfcorehdr= specifies the location of elf core header
598 * stored by the crashed kernel. This option will be passed
599 * by kexec loader to the capture kernel.
601 static int __init setup_elfcorehdr(char *arg)
606 elfcorehdr_addr = memparse(arg, &end);
607 return end > arg ? 0 : -EINVAL;
609 early_param("elfcorehdr", setup_elfcorehdr);
612 static __init void reserve_ibft_region(void)
614 unsigned long addr, size = 0;
616 addr = find_ibft_region(&size);
619 reserve_early_overlap_ok(addr, addr + size, "ibft");
622 #ifdef CONFIG_X86_RESERVE_LOW_64K
623 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
626 "%s detected: BIOS may corrupt low RAM, working around it.\n",
629 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
630 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
636 /* List of systems that have known low memory corruption BIOS problems */
637 static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
638 #ifdef CONFIG_X86_RESERVE_LOW_64K
640 .callback = dmi_low_memory_corruption,
643 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
647 .callback = dmi_low_memory_corruption,
648 .ident = "Phoenix BIOS",
650 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
654 .callback = dmi_low_memory_corruption,
655 .ident = "Phoenix/MSC BIOS",
657 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix/MSC"),
661 * AMI BIOS with low memory corruption was found on Intel DG45ID and
663 * It has a different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
664 * match only DMI_BOARD_NAME and see if there is more bad products
668 .callback = dmi_low_memory_corruption,
671 DMI_MATCH(DMI_BOARD_NAME, "DG45ID"),
675 .callback = dmi_low_memory_corruption,
678 DMI_MATCH(DMI_BOARD_NAME, "DG45FC"),
682 * The Dell Inspiron Mini 1012 has DMI_BIOS_VENDOR = "Dell Inc.", so
683 * match on the product name.
686 .callback = dmi_low_memory_corruption,
687 .ident = "Phoenix BIOS",
689 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
696 static void __init trim_bios_range(void)
699 * A special case is the first 4Kb of memory;
700 * This is a BIOS owned area, not kernel ram, but generally
701 * not listed as such in the E820 table.
703 e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
705 * special case: Some BIOSen report the PC BIOS
706 * area (640->1Mb) as ram even though it is not.
709 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
710 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
714 * Determine if we were loaded by an EFI loader. If so, then we have also been
715 * passed the efi memmap, systab, etc., so we should use these data structures
716 * for initialization. Note, the efi init code path is determined by the
717 * global efi_enabled. This allows the same kernel image to be used on existing
718 * systems (with a traditional BIOS) as well as on EFI systems.
721 * setup_arch - architecture-specific boot-time initializations
723 * Note: On x86_64, fixmaps are ready for use even before this is called.
726 void __init setup_arch(char **cmdline_p)
733 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
734 visws_early_detect();
736 printk(KERN_INFO "Command line: %s\n", boot_command_line);
739 /* VMI may relocate the fixmap; do this before touching ioremap area */
742 /* OFW also may relocate the fixmap */
747 early_ioremap_init();
749 setup_olpc_ofw_pgd();
751 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
752 screen_info = boot_params.screen_info;
753 edid_info = boot_params.edid_info;
755 apm_info.bios = boot_params.apm_bios_info;
756 ist_info = boot_params.ist_info;
757 if (boot_params.sys_desc_table.length != 0) {
758 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
759 machine_id = boot_params.sys_desc_table.table[0];
760 machine_submodel_id = boot_params.sys_desc_table.table[1];
761 BIOS_revision = boot_params.sys_desc_table.table[2];
764 saved_video_mode = boot_params.hdr.vid_mode;
765 bootloader_type = boot_params.hdr.type_of_loader;
766 if ((bootloader_type >> 4) == 0xe) {
767 bootloader_type &= 0xf;
768 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
770 bootloader_version = bootloader_type & 0xf;
771 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
773 #ifdef CONFIG_BLK_DEV_RAM
774 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
775 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
776 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
779 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
791 x86_init.oem.arch_setup();
795 /* update the e820_saved too */
796 e820_reserve_setup_data();
800 if (!boot_params.hdr.root_flags)
801 root_mountflags &= ~MS_RDONLY;
802 init_mm.start_code = (unsigned long) _text;
803 init_mm.end_code = (unsigned long) _etext;
804 init_mm.end_data = (unsigned long) _edata;
805 init_mm.brk = _brk_end;
807 code_resource.start = virt_to_phys(_text);
808 code_resource.end = virt_to_phys(_etext)-1;
809 data_resource.start = virt_to_phys(_etext);
810 data_resource.end = virt_to_phys(_edata)-1;
811 bss_resource.start = virt_to_phys(&__bss_start);
812 bss_resource.end = virt_to_phys(&__bss_stop)-1;
814 #ifdef CONFIG_CMDLINE_BOOL
815 #ifdef CONFIG_CMDLINE_OVERRIDE
816 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
818 if (builtin_cmdline[0]) {
819 /* append boot loader cmdline to builtin */
820 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
821 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
822 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
827 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
828 *cmdline_p = command_line;
831 * x86_configure_nx() is called before parse_early_param() to detect
832 * whether hardware doesn't support NX (so that the early EHCI debug
833 * console setup can safely call set_fixmap()). It may then be called
834 * again from within noexec_setup() during parsing early parameters
835 * to honor the respective command line option.
843 /* Must be before kernel pagetables are setup */
846 /* after early param, so could get panic from serial */
847 reserve_early_setup_data();
849 if (acpi_mps_check()) {
850 #ifdef CONFIG_X86_LOCAL_APIC
853 setup_clear_cpu_cap(X86_FEATURE_APIC);
857 if (pci_early_dump_regs)
858 early_dump_pci_devices();
861 finish_e820_parsing();
868 dmi_check_system(bad_bios_dmi_table);
871 * VMware detection requires dmi to be available, so this
872 * needs to be done after dmi_scan_machine, for the BP.
874 init_hypervisor_platform();
876 x86_init.resources.probe_roms();
878 /* after parse_early_param, so could debug it */
879 insert_resource(&iomem_resource, &code_resource);
880 insert_resource(&iomem_resource, &data_resource);
881 insert_resource(&iomem_resource, &bss_resource);
885 if (ppro_with_ram_bug()) {
886 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
888 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
889 printk(KERN_INFO "fixed physical RAM map:\n");
890 e820_print_map("bad_ppro");
893 early_gart_iommu_check();
897 * partially used pages are not usable - thus
898 * we are rounding upwards:
900 max_pfn = e820_end_of_ram_pfn();
902 /* preallocate 4k for mptable mpc */
903 early_reserve_e820_mpc_new();
904 /* update e820 for memory not covered by WB MTRRs */
906 if (mtrr_trim_uncached_memory(max_pfn))
907 max_pfn = e820_end_of_ram_pfn();
910 /* max_low_pfn get updated here */
911 find_low_pfn_range();
913 num_physpages = max_pfn;
917 /* How many end-of-memory variables you have, grandma! */
918 /* need this before calling reserve_initrd */
919 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
920 max_low_pfn = e820_end_of_low_ram_pfn();
922 max_low_pfn = max_pfn;
924 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
925 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
928 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
929 setup_bios_corruption_check();
932 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
933 max_pfn_mapped<<PAGE_SHIFT);
938 * Find and reserve possible boot-time SMP configuration:
942 reserve_ibft_region();
944 reserve_trampoline_memory();
946 #ifdef CONFIG_ACPI_SLEEP
948 * Reserve low memory region for sleep support.
949 * even before init_memory_mapping
951 acpi_reserve_wakeup_memory();
955 /* max_pfn_mapped is updated here */
956 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
957 max_pfn_mapped = max_low_pfn_mapped;
960 if (max_pfn > max_low_pfn) {
961 max_pfn_mapped = init_memory_mapping(1UL<<32,
962 max_pfn<<PAGE_SHIFT);
963 /* can we preseve max_low_pfn ?*/
964 max_low_pfn = max_pfn;
969 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
972 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
973 if (init_ohci1394_dma_early)
974 init_ohci1394_dma_on_all_controllers();
979 reserve_crashkernel();
986 * Parse the ACPI tables for possible boot-time SMP configuration.
988 acpi_boot_table_init();
990 early_acpi_boot_init();
992 #ifdef CONFIG_ACPI_NUMA
994 * Parse SRAT to discover nodes.
996 acpi = acpi_numa_init();
999 #ifdef CONFIG_K8_NUMA
1001 k8 = !k8_numa_init(0, max_pfn);
1004 initmem_init(0, max_pfn, acpi, k8);
1005 #ifndef CONFIG_NO_BOOTMEM
1006 early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
1009 dma32_reserve_bootmem();
1011 #ifdef CONFIG_KVM_CLOCK
1015 x86_init.paging.pagetable_setup_start(swapper_pg_dir);
1017 x86_init.paging.pagetable_setup_done(swapper_pg_dir);
1019 setup_trampoline_page_table();
1023 #ifdef CONFIG_X86_64
1027 generic_apic_probe();
1032 * Read APIC and some other early information from ACPI tables.
1039 * get boot-time SMP configuration:
1041 if (smp_found_config)
1044 prefill_possible_map();
1046 #ifdef CONFIG_X86_64
1050 init_apic_mappings();
1051 ioapic_init_mappings();
1053 /* need to wait for io_apic is mapped */
1054 probe_nr_irqs_gsi();
1058 e820_reserve_resources();
1059 e820_mark_nosave_regions(max_low_pfn);
1061 x86_init.resources.reserve_resources();
1066 #if defined(CONFIG_VGA_CONSOLE)
1067 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1068 conswitchp = &vga_con;
1069 #elif defined(CONFIG_DUMMY_CONSOLE)
1070 conswitchp = &dummy_con;
1073 x86_init.oem.banner();
1077 local_irq_save(flags);
1078 arch_init_ideal_nop5();
1079 local_irq_restore(flags);
1082 #ifdef CONFIG_X86_32
1084 static struct resource video_ram_resource = {
1085 .name = "Video RAM area",
1088 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1091 void __init i386_reserve_resources(void)
1093 request_resource(&iomem_resource, &video_ram_resource);
1094 reserve_standard_io_resources();
1097 #endif /* CONFIG_X86_32 */