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/dmi.h>
46 #include <linux/pfn.h>
47 #include <linux/pci.h>
48 #include <asm/pci-direct.h>
49 #include <linux/init_ohci1394_dma.h>
50 #include <linux/kvm_para.h>
52 #include <linux/errno.h>
53 #include <linux/kernel.h>
54 #include <linux/stddef.h>
55 #include <linux/unistd.h>
56 #include <linux/ptrace.h>
57 #include <linux/slab.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>
70 #include <video/edid.h>
75 #include <asm/mpspec.h>
76 #include <asm/setup.h>
78 #include <asm/timer.h>
79 #include <asm/i8259.h>
80 #include <asm/sections.h>
82 #include <asm/io_apic.h>
85 #include <asm/setup_arch.h>
86 #include <asm/bios_ebda.h>
87 #include <asm/cacheflush.h>
88 #include <asm/processor.h>
91 #include <asm/system.h>
92 #include <asm/vsyscall.h>
96 #include <asm/iommu.h>
98 #include <asm/mmu_context.h>
99 #include <asm/proto.h>
101 #include <asm/paravirt.h>
102 #include <asm/hypervisor.h>
104 #include <asm/percpu.h>
105 #include <asm/topology.h>
106 #include <asm/apicdef.h>
108 #include <asm/numa_64.h>
115 unsigned int boot_cpu_id __read_mostly
;
118 int default_cpu_present_to_apicid(int mps_cpu
)
120 return __default_cpu_present_to_apicid(mps_cpu
);
123 int default_check_phys_apicid_present(int boot_cpu_physical_apicid
)
125 return __default_check_phys_apicid_present(boot_cpu_physical_apicid
);
129 #ifndef CONFIG_DEBUG_BOOT_PARAMS
130 struct boot_params __initdata boot_params
;
132 struct boot_params boot_params
;
138 static struct resource data_resource
= {
139 .name
= "Kernel data",
142 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
145 static struct resource code_resource
= {
146 .name
= "Kernel code",
149 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
152 static struct resource bss_resource
= {
153 .name
= "Kernel bss",
156 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
161 /* This value is set up by the early boot code to point to the value
162 immediately after the boot time page tables. It contains a *physical*
163 address, and must not be in the .bss segment! */
164 unsigned long init_pg_tables_start __initdata
= ~0UL;
165 unsigned long init_pg_tables_end __initdata
= ~0UL;
167 static struct resource video_ram_resource
= {
168 .name
= "Video RAM area",
171 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
174 /* cpu data as detected by the assembly code in head.S */
175 struct cpuinfo_x86 new_cpu_data __cpuinitdata
= {0, 0, 0, 0, -1, 1, 0, 0, -1};
176 /* common cpu data for all cpus */
177 struct cpuinfo_x86 boot_cpu_data __read_mostly
= {0, 0, 0, 0, -1, 1, 0, 0, -1};
178 EXPORT_SYMBOL(boot_cpu_data
);
179 static void set_mca_bus(int x
)
186 unsigned int def_to_bigsmp
;
188 /* for MCA, but anyone else can use it if they want */
189 unsigned int machine_id
;
190 unsigned int machine_submodel_id
;
191 unsigned int BIOS_revision
;
193 struct apm_info apm_info
;
194 EXPORT_SYMBOL(apm_info
);
196 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
197 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
198 struct ist_info ist_info
;
199 EXPORT_SYMBOL(ist_info
);
201 struct ist_info ist_info
;
205 struct cpuinfo_x86 boot_cpu_data __read_mostly
;
206 EXPORT_SYMBOL(boot_cpu_data
);
210 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
211 unsigned long mmu_cr4_features
;
213 unsigned long mmu_cr4_features
= X86_CR4_PAE
;
216 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
223 char dmi_alloc_data
[DMI_MAX_DATA
];
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 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 copy_edd(void)
270 #ifdef CONFIG_BLK_DEV_INITRD
274 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
275 static void __init
relocate_initrd(void)
278 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
279 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
280 u64 end_of_lowmem
= max_low_pfn
<< PAGE_SHIFT
;
282 unsigned long slop
, clen
, mapaddr
;
285 /* We need to move the initrd down into lowmem */
286 ramdisk_here
= find_e820_area(0, end_of_lowmem
, ramdisk_size
,
289 if (ramdisk_here
== -1ULL)
290 panic("Cannot find place for new RAMDISK of size %lld\n",
293 /* Note: this includes all the lowmem currently occupied by
294 the initrd, we rely on that fact to keep the data intact. */
295 reserve_early(ramdisk_here
, ramdisk_here
+ ramdisk_size
,
297 initrd_start
= ramdisk_here
+ PAGE_OFFSET
;
298 initrd_end
= initrd_start
+ ramdisk_size
;
299 printk(KERN_INFO
"Allocated new RAMDISK: %08llx - %08llx\n",
300 ramdisk_here
, ramdisk_here
+ ramdisk_size
);
302 q
= (char *)initrd_start
;
304 /* Copy any lowmem portion of the initrd */
305 if (ramdisk_image
< end_of_lowmem
) {
306 clen
= end_of_lowmem
- ramdisk_image
;
307 p
= (char *)__va(ramdisk_image
);
310 ramdisk_image
+= clen
;
311 ramdisk_size
-= clen
;
314 /* Copy the highmem portion of the initrd */
315 while (ramdisk_size
) {
316 slop
= ramdisk_image
& ~PAGE_MASK
;
318 if (clen
> MAX_MAP_CHUNK
-slop
)
319 clen
= MAX_MAP_CHUNK
-slop
;
320 mapaddr
= ramdisk_image
& PAGE_MASK
;
321 p
= early_memremap(mapaddr
, clen
+slop
);
322 memcpy(q
, p
+slop
, clen
);
323 early_iounmap(p
, clen
+slop
);
325 ramdisk_image
+= clen
;
326 ramdisk_size
-= clen
;
328 /* high pages is not converted by early_res_to_bootmem */
329 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
330 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
331 printk(KERN_INFO
"Move RAMDISK from %016llx - %016llx to"
332 " %08llx - %08llx\n",
333 ramdisk_image
, ramdisk_image
+ ramdisk_size
- 1,
334 ramdisk_here
, ramdisk_here
+ ramdisk_size
- 1);
338 static void __init
reserve_initrd(void)
340 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
341 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
342 u64 ramdisk_end
= ramdisk_image
+ ramdisk_size
;
343 u64 end_of_lowmem
= max_low_pfn
<< PAGE_SHIFT
;
345 if (!boot_params
.hdr
.type_of_loader
||
346 !ramdisk_image
|| !ramdisk_size
)
347 return; /* No initrd provided by bootloader */
351 if (ramdisk_size
>= (end_of_lowmem
>>1)) {
352 free_early(ramdisk_image
, ramdisk_end
);
353 printk(KERN_ERR
"initrd too large to handle, "
354 "disabling initrd\n");
358 printk(KERN_INFO
"RAMDISK: %08llx - %08llx\n", ramdisk_image
,
362 if (ramdisk_end
<= end_of_lowmem
) {
363 /* All in lowmem, easy case */
365 * don't need to reserve again, already reserved early
366 * in i386_start_kernel
368 initrd_start
= ramdisk_image
+ PAGE_OFFSET
;
369 initrd_end
= initrd_start
+ ramdisk_size
;
376 printk(KERN_ERR
"initrd extends beyond end of memory "
377 "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
378 ramdisk_end
, end_of_lowmem
);
381 free_early(ramdisk_image
, ramdisk_end
);
384 static void __init
reserve_initrd(void)
387 #endif /* CONFIG_BLK_DEV_INITRD */
389 static void __init
parse_setup_data(void)
391 struct setup_data
*data
;
394 if (boot_params
.hdr
.version
< 0x0209)
396 pa_data
= boot_params
.hdr
.setup_data
;
398 data
= early_memremap(pa_data
, PAGE_SIZE
);
399 switch (data
->type
) {
401 parse_e820_ext(data
, pa_data
);
406 pa_data
= data
->next
;
407 early_iounmap(data
, PAGE_SIZE
);
411 static void __init
e820_reserve_setup_data(void)
413 struct setup_data
*data
;
417 if (boot_params
.hdr
.version
< 0x0209)
419 pa_data
= boot_params
.hdr
.setup_data
;
421 data
= early_memremap(pa_data
, sizeof(*data
));
422 e820_update_range(pa_data
, sizeof(*data
)+data
->len
,
423 E820_RAM
, E820_RESERVED_KERN
);
425 pa_data
= data
->next
;
426 early_iounmap(data
, sizeof(*data
));
431 sanitize_e820_map(e820
.map
, ARRAY_SIZE(e820
.map
), &e820
.nr_map
);
432 memcpy(&e820_saved
, &e820
, sizeof(struct e820map
));
433 printk(KERN_INFO
"extended physical RAM map:\n");
434 e820_print_map("reserve setup_data");
437 static void __init
reserve_early_setup_data(void)
439 struct setup_data
*data
;
443 if (boot_params
.hdr
.version
< 0x0209)
445 pa_data
= boot_params
.hdr
.setup_data
;
447 data
= early_memremap(pa_data
, sizeof(*data
));
448 sprintf(buf
, "setup data %x", data
->type
);
449 reserve_early(pa_data
, pa_data
+sizeof(*data
)+data
->len
, buf
);
450 pa_data
= data
->next
;
451 early_iounmap(data
, sizeof(*data
));
456 * --------- Crashkernel reservation ------------------------------
462 * Reserve @size bytes of crashkernel memory at any suitable offset.
464 * @size: Size of the crashkernel memory to reserve.
465 * Returns the base address on success, and -1ULL on failure.
468 unsigned long long __init
find_and_reserve_crashkernel(unsigned long long size
)
470 const unsigned long long alignment
= 16<<20; /* 16M */
471 unsigned long long start
= 0LL;
476 start
= find_e820_area(start
, ULONG_MAX
, size
, alignment
);
480 /* try to reserve it */
481 ret
= reserve_bootmem_generic(start
, size
, BOOTMEM_EXCLUSIVE
);
489 static inline unsigned long long get_total_mem(void)
491 unsigned long long total
;
493 total
= max_low_pfn
- min_low_pfn
;
494 #ifdef CONFIG_HIGHMEM
495 total
+= highend_pfn
- highstart_pfn
;
498 return total
<< PAGE_SHIFT
;
501 static void __init
reserve_crashkernel(void)
503 unsigned long long total_mem
;
504 unsigned long long crash_size
, crash_base
;
507 total_mem
= get_total_mem();
509 ret
= parse_crashkernel(boot_command_line
, total_mem
,
510 &crash_size
, &crash_base
);
511 if (ret
!= 0 || crash_size
<= 0)
514 /* 0 means: find the address automatically */
515 if (crash_base
<= 0) {
516 crash_base
= find_and_reserve_crashkernel(crash_size
);
517 if (crash_base
== -1ULL) {
518 pr_info("crashkernel reservation failed. "
519 "No suitable area found.\n");
523 ret
= reserve_bootmem_generic(crash_base
, crash_size
,
526 pr_info("crashkernel reservation failed - "
527 "memory is in use\n");
532 printk(KERN_INFO
"Reserving %ldMB of memory at %ldMB "
533 "for crashkernel (System RAM: %ldMB)\n",
534 (unsigned long)(crash_size
>> 20),
535 (unsigned long)(crash_base
>> 20),
536 (unsigned long)(total_mem
>> 20));
538 crashk_res
.start
= crash_base
;
539 crashk_res
.end
= crash_base
+ crash_size
- 1;
540 insert_resource(&iomem_resource
, &crashk_res
);
543 static void __init
reserve_crashkernel(void)
548 static struct resource standard_io_resources
[] = {
549 { .name
= "dma1", .start
= 0x00, .end
= 0x1f,
550 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
551 { .name
= "pic1", .start
= 0x20, .end
= 0x21,
552 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
553 { .name
= "timer0", .start
= 0x40, .end
= 0x43,
554 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
555 { .name
= "timer1", .start
= 0x50, .end
= 0x53,
556 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
557 { .name
= "keyboard", .start
= 0x60, .end
= 0x60,
558 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
559 { .name
= "keyboard", .start
= 0x64, .end
= 0x64,
560 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
561 { .name
= "dma page reg", .start
= 0x80, .end
= 0x8f,
562 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
563 { .name
= "pic2", .start
= 0xa0, .end
= 0xa1,
564 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
565 { .name
= "dma2", .start
= 0xc0, .end
= 0xdf,
566 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
567 { .name
= "fpu", .start
= 0xf0, .end
= 0xff,
568 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
}
571 static void __init
reserve_standard_io_resources(void)
575 /* request I/O space for devices used on all i[345]86 PCs */
576 for (i
= 0; i
< ARRAY_SIZE(standard_io_resources
); i
++)
577 request_resource(&ioport_resource
, &standard_io_resources
[i
]);
582 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
583 * is_kdump_kernel() to determine if we are booting after a panic. Hence
584 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
587 #ifdef CONFIG_CRASH_DUMP
588 /* elfcorehdr= specifies the location of elf core header
589 * stored by the crashed kernel. This option will be passed
590 * by kexec loader to the capture kernel.
592 static int __init
setup_elfcorehdr(char *arg
)
597 elfcorehdr_addr
= memparse(arg
, &end
);
598 return end
> arg
? 0 : -EINVAL
;
600 early_param("elfcorehdr", setup_elfcorehdr
);
603 static struct x86_quirks default_x86_quirks __initdata
;
605 struct x86_quirks
*x86_quirks __initdata
= &default_x86_quirks
;
607 #ifdef CONFIG_X86_RESERVE_LOW_64K
608 static int __init
dmi_low_memory_corruption(const struct dmi_system_id
*d
)
611 "%s detected: BIOS may corrupt low RAM, working around it.\n",
614 e820_update_range(0, 0x10000, E820_RAM
, E820_RESERVED
);
615 sanitize_e820_map(e820
.map
, ARRAY_SIZE(e820
.map
), &e820
.nr_map
);
621 /* List of systems that have known low memory corruption BIOS problems */
622 static struct dmi_system_id __initdata bad_bios_dmi_table
[] = {
623 #ifdef CONFIG_X86_RESERVE_LOW_64K
625 .callback
= dmi_low_memory_corruption
,
628 DMI_MATCH(DMI_BIOS_VENDOR
, "American Megatrends Inc."),
632 .callback
= dmi_low_memory_corruption
,
633 .ident
= "Phoenix BIOS",
635 DMI_MATCH(DMI_BIOS_VENDOR
, "Phoenix Technologies"),
643 * Determine if we were loaded by an EFI loader. If so, then we have also been
644 * passed the efi memmap, systab, etc., so we should use these data structures
645 * for initialization. Note, the efi init code path is determined by the
646 * global efi_enabled. This allows the same kernel image to be used on existing
647 * systems (with a traditional BIOS) as well as on EFI systems.
650 * setup_arch - architecture-specific boot-time initializations
652 * Note: On x86_64, fixmaps are ready for use even before this is called.
655 void __init
setup_arch(char **cmdline_p
)
658 memcpy(&boot_cpu_data
, &new_cpu_data
, sizeof(new_cpu_data
));
659 visws_early_detect();
661 printk(KERN_INFO
"Command line: %s\n", boot_command_line
);
664 /* VMI may relocate the fixmap; do this before touching ioremap area */
668 early_ioremap_init();
670 ROOT_DEV
= old_decode_dev(boot_params
.hdr
.root_dev
);
671 screen_info
= boot_params
.screen_info
;
672 edid_info
= boot_params
.edid_info
;
674 apm_info
.bios
= boot_params
.apm_bios_info
;
675 ist_info
= boot_params
.ist_info
;
676 if (boot_params
.sys_desc_table
.length
!= 0) {
677 set_mca_bus(boot_params
.sys_desc_table
.table
[3] & 0x2);
678 machine_id
= boot_params
.sys_desc_table
.table
[0];
679 machine_submodel_id
= boot_params
.sys_desc_table
.table
[1];
680 BIOS_revision
= boot_params
.sys_desc_table
.table
[2];
683 saved_video_mode
= boot_params
.hdr
.vid_mode
;
684 bootloader_type
= boot_params
.hdr
.type_of_loader
;
686 #ifdef CONFIG_BLK_DEV_RAM
687 rd_image_start
= boot_params
.hdr
.ram_size
& RAMDISK_IMAGE_START_MASK
;
688 rd_prompt
= ((boot_params
.hdr
.ram_size
& RAMDISK_PROMPT_FLAG
) != 0);
689 rd_doload
= ((boot_params
.hdr
.ram_size
& RAMDISK_LOAD_FLAG
) != 0);
692 if (!strncmp((char *)&boot_params
.efi_info
.efi_loader_signature
,
708 /* update the e820_saved too */
709 e820_reserve_setup_data();
713 if (!boot_params
.hdr
.root_flags
)
714 root_mountflags
&= ~MS_RDONLY
;
715 init_mm
.start_code
= (unsigned long) _text
;
716 init_mm
.end_code
= (unsigned long) _etext
;
717 init_mm
.end_data
= (unsigned long) _edata
;
719 init_mm
.brk
= init_pg_tables_end
+ PAGE_OFFSET
;
721 init_mm
.brk
= (unsigned long) &_end
;
724 code_resource
.start
= virt_to_phys(_text
);
725 code_resource
.end
= virt_to_phys(_etext
)-1;
726 data_resource
.start
= virt_to_phys(_etext
);
727 data_resource
.end
= virt_to_phys(_edata
)-1;
728 bss_resource
.start
= virt_to_phys(&__bss_start
);
729 bss_resource
.end
= virt_to_phys(&__bss_stop
)-1;
731 #ifdef CONFIG_CMDLINE_BOOL
732 #ifdef CONFIG_CMDLINE_OVERRIDE
733 strlcpy(boot_command_line
, builtin_cmdline
, COMMAND_LINE_SIZE
);
735 if (builtin_cmdline
[0]) {
736 /* append boot loader cmdline to builtin */
737 strlcat(builtin_cmdline
, " ", COMMAND_LINE_SIZE
);
738 strlcat(builtin_cmdline
, boot_command_line
, COMMAND_LINE_SIZE
);
739 strlcpy(boot_command_line
, builtin_cmdline
, COMMAND_LINE_SIZE
);
744 strlcpy(command_line
, boot_command_line
, COMMAND_LINE_SIZE
);
745 *cmdline_p
= command_line
;
753 /* Must be before kernel pagetables are setup */
756 /* after early param, so could get panic from serial */
757 reserve_early_setup_data();
759 if (acpi_mps_check()) {
760 #ifdef CONFIG_X86_LOCAL_APIC
763 setup_clear_cpu_cap(X86_FEATURE_APIC
);
767 if (pci_early_dump_regs
)
768 early_dump_pci_devices();
771 finish_e820_parsing();
778 dmi_check_system(bad_bios_dmi_table
);
781 * VMware detection requires dmi to be available, so this
782 * needs to be done after dmi_scan_machine, for the BP.
784 init_hypervisor(&boot_cpu_data
);
790 /* after parse_early_param, so could debug it */
791 insert_resource(&iomem_resource
, &code_resource
);
792 insert_resource(&iomem_resource
, &data_resource
);
793 insert_resource(&iomem_resource
, &bss_resource
);
797 if (ppro_with_ram_bug()) {
798 e820_update_range(0x70000000ULL
, 0x40000ULL
, E820_RAM
,
800 sanitize_e820_map(e820
.map
, ARRAY_SIZE(e820
.map
), &e820
.nr_map
);
801 printk(KERN_INFO
"fixed physical RAM map:\n");
802 e820_print_map("bad_ppro");
805 early_gart_iommu_check();
809 * partially used pages are not usable - thus
810 * we are rounding upwards:
812 max_pfn
= e820_end_of_ram_pfn();
814 /* preallocate 4k for mptable mpc */
815 early_reserve_e820_mpc_new();
816 /* update e820 for memory not covered by WB MTRRs */
818 if (mtrr_trim_uncached_memory(max_pfn
))
819 max_pfn
= e820_end_of_ram_pfn();
822 /* max_low_pfn get updated here */
823 find_low_pfn_range();
825 num_physpages
= max_pfn
;
829 /* How many end-of-memory variables you have, grandma! */
830 /* need this before calling reserve_initrd */
831 if (max_pfn
> (1UL<<(32 - PAGE_SHIFT
)))
832 max_low_pfn
= e820_end_of_low_ram_pfn();
834 max_low_pfn
= max_pfn
;
836 high_memory
= (void *)__va(max_pfn
* PAGE_SIZE
- 1) + 1;
839 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
840 setup_bios_corruption_check();
843 /* max_pfn_mapped is updated here */
844 max_low_pfn_mapped
= init_memory_mapping(0, max_low_pfn
<<PAGE_SHIFT
);
845 max_pfn_mapped
= max_low_pfn_mapped
;
848 if (max_pfn
> max_low_pfn
) {
849 max_pfn_mapped
= init_memory_mapping(1UL<<32,
850 max_pfn
<<PAGE_SHIFT
);
851 /* can we preseve max_low_pfn ?*/
852 max_low_pfn
= max_pfn
;
857 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
860 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
861 if (init_ohci1394_dma_early
)
862 init_ohci1394_dma_on_all_controllers();
872 * Parse the ACPI tables for possible boot-time SMP configuration.
874 acpi_boot_table_init();
876 early_acpi_boot_init();
878 #ifdef CONFIG_ACPI_NUMA
880 * Parse SRAT to discover nodes.
885 initmem_init(0, max_pfn
);
887 #ifdef CONFIG_ACPI_SLEEP
889 * Reserve low memory region for sleep support.
891 acpi_reserve_bootmem();
894 * Find and reserve possible boot-time SMP configuration:
898 reserve_crashkernel();
902 * dma32_reserve_bootmem() allocates bootmem which may conflict
903 * with the crashkernel command line, so do that after
904 * reserve_crashkernel()
906 dma32_reserve_bootmem();
909 reserve_ibft_region();
911 #ifdef CONFIG_KVM_CLOCK
915 paravirt_pagetable_setup_start(swapper_pg_dir
);
917 paravirt_pagetable_setup_done(swapper_pg_dir
);
918 paravirt_post_allocator_init();
924 generic_apic_probe();
929 * Read APIC and some other early information from ACPI tables.
933 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
935 * get boot-time SMP configuration:
937 if (smp_found_config
)
941 prefill_possible_map();
947 init_apic_mappings();
948 ioapic_init_mappings();
950 /* need to wait for io_apic is mapped */
955 e820_reserve_resources();
956 e820_mark_nosave_regions(max_low_pfn
);
959 request_resource(&iomem_resource
, &video_ram_resource
);
961 reserve_standard_io_resources();
966 #if defined(CONFIG_VGA_CONSOLE)
967 if (!efi_enabled
|| (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY
))
968 conswitchp
= &vga_con
;
969 #elif defined(CONFIG_DUMMY_CONSOLE)
970 conswitchp
= &dummy_con
;
978 * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors
981 * Perform any necessary interrupt initialisation prior to setting up
982 * the "ordinary" interrupt call gates. For legacy reasons, the ISA
983 * interrupts should be initialised here if the machine emulates a PC
986 void __init
x86_quirk_pre_intr_init(void)
988 if (x86_quirks
->arch_pre_intr_init
) {
989 if (x86_quirks
->arch_pre_intr_init())
996 * x86_quirk_intr_init - post gate setup interrupt initialisation
999 * Fill in any interrupts that may have been left out by the general
1000 * init_IRQ() routine. interrupts having to do with the machine rather
1001 * than the devices on the I/O bus (like APIC interrupts in intel MP
1002 * systems) are started here.
1004 void __init
x86_quirk_intr_init(void)
1006 if (x86_quirks
->arch_intr_init
) {
1007 if (x86_quirks
->arch_intr_init())
1013 * x86_quirk_trap_init - initialise system specific traps
1016 * Called as the final act of trap_init(). Used in VISWS to initialise
1017 * the various board specific APIC traps.
1019 void __init
x86_quirk_trap_init(void)
1021 if (x86_quirks
->arch_trap_init
) {
1022 if (x86_quirks
->arch_trap_init())
1027 static struct irqaction irq0
= {
1028 .handler
= timer_interrupt
,
1029 .flags
= IRQF_DISABLED
| IRQF_NOBALANCING
| IRQF_IRQPOLL
| IRQF_TIMER
,
1030 .mask
= CPU_MASK_NONE
,
1035 * x86_quirk_pre_time_init - do any specific initialisations before.
1038 void __init
x86_quirk_pre_time_init(void)
1040 if (x86_quirks
->arch_pre_time_init
)
1041 x86_quirks
->arch_pre_time_init();
1045 * x86_quirk_time_init - do any specific initialisations for the system timer.
1048 * Must plug the system timer interrupt source at HZ into the IRQ listed
1049 * in irq_vectors.h:TIMER_IRQ
1051 void __init
x86_quirk_time_init(void)
1053 if (x86_quirks
->arch_time_init
) {
1055 * A nonzero return code does not mean failure, it means
1056 * that the architecture quirk does not want any
1057 * generic (timer) setup to be performed after this:
1059 if (x86_quirks
->arch_time_init())
1063 irq0
.mask
= cpumask_of_cpu(0);
1064 setup_irq(0, &irq0
);
1066 #endif /* CONFIG_X86_32 */