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
;
117 static __initdata
unsigned long _brk_start
= (unsigned long)__brk_base
;
118 unsigned long _brk_end
= (unsigned long)__brk_base
;
121 int default_cpu_present_to_apicid(int mps_cpu
)
123 return __default_cpu_present_to_apicid(mps_cpu
);
126 int default_check_phys_apicid_present(int boot_cpu_physical_apicid
)
128 return __default_check_phys_apicid_present(boot_cpu_physical_apicid
);
132 #ifndef CONFIG_DEBUG_BOOT_PARAMS
133 struct boot_params __initdata boot_params
;
135 struct boot_params boot_params
;
141 static struct resource data_resource
= {
142 .name
= "Kernel data",
145 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
148 static struct resource code_resource
= {
149 .name
= "Kernel code",
152 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
155 static struct resource bss_resource
= {
156 .name
= "Kernel bss",
159 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
164 static struct resource video_ram_resource
= {
165 .name
= "Video RAM area",
168 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
171 /* cpu data as detected by the assembly code in head.S */
172 struct cpuinfo_x86 new_cpu_data __cpuinitdata
= {0, 0, 0, 0, -1, 1, 0, 0, -1};
173 /* common cpu data for all cpus */
174 struct cpuinfo_x86 boot_cpu_data __read_mostly
= {0, 0, 0, 0, -1, 1, 0, 0, -1};
175 EXPORT_SYMBOL(boot_cpu_data
);
176 static void set_mca_bus(int x
)
183 unsigned int def_to_bigsmp
;
185 /* for MCA, but anyone else can use it if they want */
186 unsigned int machine_id
;
187 unsigned int machine_submodel_id
;
188 unsigned int BIOS_revision
;
190 struct apm_info apm_info
;
191 EXPORT_SYMBOL(apm_info
);
193 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
194 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
195 struct ist_info ist_info
;
196 EXPORT_SYMBOL(ist_info
);
198 struct ist_info ist_info
;
202 struct cpuinfo_x86 boot_cpu_data __read_mostly
= {
203 .x86_phys_bits
= MAX_PHYSMEM_BITS
,
205 EXPORT_SYMBOL(boot_cpu_data
);
209 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
210 unsigned long mmu_cr4_features
;
212 unsigned long mmu_cr4_features
= X86_CR4_PAE
;
215 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
221 struct screen_info screen_info
;
222 EXPORT_SYMBOL(screen_info
);
223 struct edid_info edid_info
;
224 EXPORT_SYMBOL_GPL(edid_info
);
226 extern int root_mountflags
;
228 unsigned long saved_video_mode
;
230 #define RAMDISK_IMAGE_START_MASK 0x07FF
231 #define RAMDISK_PROMPT_FLAG 0x8000
232 #define RAMDISK_LOAD_FLAG 0x4000
234 static char __initdata command_line
[COMMAND_LINE_SIZE
];
235 #ifdef CONFIG_CMDLINE_BOOL
236 static char __initdata builtin_cmdline
[COMMAND_LINE_SIZE
] = CONFIG_CMDLINE
;
239 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
241 #ifdef CONFIG_EDD_MODULE
245 * copy_edd() - Copy the BIOS EDD information
246 * from boot_params into a safe place.
249 static inline void copy_edd(void)
251 memcpy(edd
.mbr_signature
, boot_params
.edd_mbr_sig_buffer
,
252 sizeof(edd
.mbr_signature
));
253 memcpy(edd
.edd_info
, boot_params
.eddbuf
, sizeof(edd
.edd_info
));
254 edd
.mbr_signature_nr
= boot_params
.edd_mbr_sig_buf_entries
;
255 edd
.edd_info_nr
= boot_params
.eddbuf_entries
;
258 static inline void copy_edd(void)
263 void * __init
extend_brk(size_t size
, size_t align
)
265 size_t mask
= align
- 1;
268 BUG_ON(_brk_start
== 0);
269 BUG_ON(align
& mask
);
271 _brk_end
= (_brk_end
+ mask
) & ~mask
;
272 BUG_ON((char *)(_brk_end
+ size
) > __brk_limit
);
274 ret
= (void *)_brk_end
;
277 memset(ret
, 0, size
);
282 static void __init
reserve_brk(void)
284 if (_brk_end
> _brk_start
)
285 reserve_early(__pa(_brk_start
), __pa(_brk_end
), "BRK");
287 /* Mark brk area as locked down and no longer taking any
292 #ifdef CONFIG_BLK_DEV_INITRD
296 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
297 static void __init
relocate_initrd(void)
300 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
301 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
302 u64 end_of_lowmem
= max_low_pfn
<< PAGE_SHIFT
;
304 unsigned long slop
, clen
, mapaddr
;
307 /* We need to move the initrd down into lowmem */
308 ramdisk_here
= find_e820_area(0, end_of_lowmem
, ramdisk_size
,
311 if (ramdisk_here
== -1ULL)
312 panic("Cannot find place for new RAMDISK of size %lld\n",
315 /* Note: this includes all the lowmem currently occupied by
316 the initrd, we rely on that fact to keep the data intact. */
317 reserve_early(ramdisk_here
, ramdisk_here
+ ramdisk_size
,
319 initrd_start
= ramdisk_here
+ PAGE_OFFSET
;
320 initrd_end
= initrd_start
+ ramdisk_size
;
321 printk(KERN_INFO
"Allocated new RAMDISK: %08llx - %08llx\n",
322 ramdisk_here
, ramdisk_here
+ ramdisk_size
);
324 q
= (char *)initrd_start
;
326 /* Copy any lowmem portion of the initrd */
327 if (ramdisk_image
< end_of_lowmem
) {
328 clen
= end_of_lowmem
- ramdisk_image
;
329 p
= (char *)__va(ramdisk_image
);
332 ramdisk_image
+= clen
;
333 ramdisk_size
-= clen
;
336 /* Copy the highmem portion of the initrd */
337 while (ramdisk_size
) {
338 slop
= ramdisk_image
& ~PAGE_MASK
;
340 if (clen
> MAX_MAP_CHUNK
-slop
)
341 clen
= MAX_MAP_CHUNK
-slop
;
342 mapaddr
= ramdisk_image
& PAGE_MASK
;
343 p
= early_memremap(mapaddr
, clen
+slop
);
344 memcpy(q
, p
+slop
, clen
);
345 early_iounmap(p
, clen
+slop
);
347 ramdisk_image
+= clen
;
348 ramdisk_size
-= clen
;
350 /* high pages is not converted by early_res_to_bootmem */
351 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
352 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
353 printk(KERN_INFO
"Move RAMDISK from %016llx - %016llx to"
354 " %08llx - %08llx\n",
355 ramdisk_image
, ramdisk_image
+ ramdisk_size
- 1,
356 ramdisk_here
, ramdisk_here
+ ramdisk_size
- 1);
360 static void __init
reserve_initrd(void)
362 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
363 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
364 u64 ramdisk_end
= ramdisk_image
+ ramdisk_size
;
365 u64 end_of_lowmem
= max_low_pfn
<< PAGE_SHIFT
;
367 if (!boot_params
.hdr
.type_of_loader
||
368 !ramdisk_image
|| !ramdisk_size
)
369 return; /* No initrd provided by bootloader */
373 if (ramdisk_size
>= (end_of_lowmem
>>1)) {
374 free_early(ramdisk_image
, ramdisk_end
);
375 printk(KERN_ERR
"initrd too large to handle, "
376 "disabling initrd\n");
380 printk(KERN_INFO
"RAMDISK: %08llx - %08llx\n", ramdisk_image
,
384 if (ramdisk_end
<= end_of_lowmem
) {
385 /* All in lowmem, easy case */
387 * don't need to reserve again, already reserved early
388 * in i386_start_kernel
390 initrd_start
= ramdisk_image
+ PAGE_OFFSET
;
391 initrd_end
= initrd_start
+ ramdisk_size
;
398 printk(KERN_ERR
"initrd extends beyond end of memory "
399 "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
400 ramdisk_end
, end_of_lowmem
);
403 free_early(ramdisk_image
, ramdisk_end
);
406 static void __init
reserve_initrd(void)
409 #endif /* CONFIG_BLK_DEV_INITRD */
411 static void __init
parse_setup_data(void)
413 struct setup_data
*data
;
416 if (boot_params
.hdr
.version
< 0x0209)
418 pa_data
= boot_params
.hdr
.setup_data
;
420 data
= early_memremap(pa_data
, PAGE_SIZE
);
421 switch (data
->type
) {
423 parse_e820_ext(data
, pa_data
);
428 pa_data
= data
->next
;
429 early_iounmap(data
, PAGE_SIZE
);
433 static void __init
e820_reserve_setup_data(void)
435 struct setup_data
*data
;
439 if (boot_params
.hdr
.version
< 0x0209)
441 pa_data
= boot_params
.hdr
.setup_data
;
443 data
= early_memremap(pa_data
, sizeof(*data
));
444 e820_update_range(pa_data
, sizeof(*data
)+data
->len
,
445 E820_RAM
, E820_RESERVED_KERN
);
447 pa_data
= data
->next
;
448 early_iounmap(data
, sizeof(*data
));
453 sanitize_e820_map(e820
.map
, ARRAY_SIZE(e820
.map
), &e820
.nr_map
);
454 memcpy(&e820_saved
, &e820
, sizeof(struct e820map
));
455 printk(KERN_INFO
"extended physical RAM map:\n");
456 e820_print_map("reserve setup_data");
459 static void __init
reserve_early_setup_data(void)
461 struct setup_data
*data
;
465 if (boot_params
.hdr
.version
< 0x0209)
467 pa_data
= boot_params
.hdr
.setup_data
;
469 data
= early_memremap(pa_data
, sizeof(*data
));
470 sprintf(buf
, "setup data %x", data
->type
);
471 reserve_early(pa_data
, pa_data
+sizeof(*data
)+data
->len
, buf
);
472 pa_data
= data
->next
;
473 early_iounmap(data
, sizeof(*data
));
478 * --------- Crashkernel reservation ------------------------------
484 * Reserve @size bytes of crashkernel memory at any suitable offset.
486 * @size: Size of the crashkernel memory to reserve.
487 * Returns the base address on success, and -1ULL on failure.
490 unsigned long long __init
find_and_reserve_crashkernel(unsigned long long size
)
492 const unsigned long long alignment
= 16<<20; /* 16M */
493 unsigned long long start
= 0LL;
498 start
= find_e820_area(start
, ULONG_MAX
, size
, alignment
);
502 /* try to reserve it */
503 ret
= reserve_bootmem_generic(start
, size
, BOOTMEM_EXCLUSIVE
);
511 static inline unsigned long long get_total_mem(void)
513 unsigned long long total
;
515 total
= max_low_pfn
- min_low_pfn
;
516 #ifdef CONFIG_HIGHMEM
517 total
+= highend_pfn
- highstart_pfn
;
520 return total
<< PAGE_SHIFT
;
523 static void __init
reserve_crashkernel(void)
525 unsigned long long total_mem
;
526 unsigned long long crash_size
, crash_base
;
529 total_mem
= get_total_mem();
531 ret
= parse_crashkernel(boot_command_line
, total_mem
,
532 &crash_size
, &crash_base
);
533 if (ret
!= 0 || crash_size
<= 0)
536 /* 0 means: find the address automatically */
537 if (crash_base
<= 0) {
538 crash_base
= find_and_reserve_crashkernel(crash_size
);
539 if (crash_base
== -1ULL) {
540 pr_info("crashkernel reservation failed. "
541 "No suitable area found.\n");
545 ret
= reserve_bootmem_generic(crash_base
, crash_size
,
548 pr_info("crashkernel reservation failed - "
549 "memory is in use\n");
554 printk(KERN_INFO
"Reserving %ldMB of memory at %ldMB "
555 "for crashkernel (System RAM: %ldMB)\n",
556 (unsigned long)(crash_size
>> 20),
557 (unsigned long)(crash_base
>> 20),
558 (unsigned long)(total_mem
>> 20));
560 crashk_res
.start
= crash_base
;
561 crashk_res
.end
= crash_base
+ crash_size
- 1;
562 insert_resource(&iomem_resource
, &crashk_res
);
565 static void __init
reserve_crashkernel(void)
570 static struct resource standard_io_resources
[] = {
571 { .name
= "dma1", .start
= 0x00, .end
= 0x1f,
572 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
573 { .name
= "pic1", .start
= 0x20, .end
= 0x21,
574 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
575 { .name
= "timer0", .start
= 0x40, .end
= 0x43,
576 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
577 { .name
= "timer1", .start
= 0x50, .end
= 0x53,
578 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
579 { .name
= "keyboard", .start
= 0x60, .end
= 0x60,
580 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
581 { .name
= "keyboard", .start
= 0x64, .end
= 0x64,
582 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
583 { .name
= "dma page reg", .start
= 0x80, .end
= 0x8f,
584 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
585 { .name
= "pic2", .start
= 0xa0, .end
= 0xa1,
586 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
587 { .name
= "dma2", .start
= 0xc0, .end
= 0xdf,
588 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
},
589 { .name
= "fpu", .start
= 0xf0, .end
= 0xff,
590 .flags
= IORESOURCE_BUSY
| IORESOURCE_IO
}
593 static void __init
reserve_standard_io_resources(void)
597 /* request I/O space for devices used on all i[345]86 PCs */
598 for (i
= 0; i
< ARRAY_SIZE(standard_io_resources
); i
++)
599 request_resource(&ioport_resource
, &standard_io_resources
[i
]);
604 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
605 * is_kdump_kernel() to determine if we are booting after a panic. Hence
606 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
609 #ifdef CONFIG_CRASH_DUMP
610 /* elfcorehdr= specifies the location of elf core header
611 * stored by the crashed kernel. This option will be passed
612 * by kexec loader to the capture kernel.
614 static int __init
setup_elfcorehdr(char *arg
)
619 elfcorehdr_addr
= memparse(arg
, &end
);
620 return end
> arg
? 0 : -EINVAL
;
622 early_param("elfcorehdr", setup_elfcorehdr
);
625 static struct x86_quirks default_x86_quirks __initdata
;
627 struct x86_quirks
*x86_quirks __initdata
= &default_x86_quirks
;
629 #ifdef CONFIG_X86_RESERVE_LOW_64K
630 static int __init
dmi_low_memory_corruption(const struct dmi_system_id
*d
)
633 "%s detected: BIOS may corrupt low RAM, working around it.\n",
636 e820_update_range(0, 0x10000, E820_RAM
, E820_RESERVED
);
637 sanitize_e820_map(e820
.map
, ARRAY_SIZE(e820
.map
), &e820
.nr_map
);
643 /* List of systems that have known low memory corruption BIOS problems */
644 static struct dmi_system_id __initdata bad_bios_dmi_table
[] = {
645 #ifdef CONFIG_X86_RESERVE_LOW_64K
647 .callback
= dmi_low_memory_corruption
,
650 DMI_MATCH(DMI_BIOS_VENDOR
, "American Megatrends Inc."),
654 .callback
= dmi_low_memory_corruption
,
655 .ident
= "Phoenix BIOS",
657 DMI_MATCH(DMI_BIOS_VENDOR
, "Phoenix Technologies"),
665 * Determine if we were loaded by an EFI loader. If so, then we have also been
666 * passed the efi memmap, systab, etc., so we should use these data structures
667 * for initialization. Note, the efi init code path is determined by the
668 * global efi_enabled. This allows the same kernel image to be used on existing
669 * systems (with a traditional BIOS) as well as on EFI systems.
672 * setup_arch - architecture-specific boot-time initializations
674 * Note: On x86_64, fixmaps are ready for use even before this is called.
677 void __init
setup_arch(char **cmdline_p
)
680 memcpy(&boot_cpu_data
, &new_cpu_data
, sizeof(new_cpu_data
));
681 visws_early_detect();
683 printk(KERN_INFO
"Command line: %s\n", boot_command_line
);
686 /* VMI may relocate the fixmap; do this before touching ioremap area */
690 early_ioremap_init();
692 ROOT_DEV
= old_decode_dev(boot_params
.hdr
.root_dev
);
693 screen_info
= boot_params
.screen_info
;
694 edid_info
= boot_params
.edid_info
;
696 apm_info
.bios
= boot_params
.apm_bios_info
;
697 ist_info
= boot_params
.ist_info
;
698 if (boot_params
.sys_desc_table
.length
!= 0) {
699 set_mca_bus(boot_params
.sys_desc_table
.table
[3] & 0x2);
700 machine_id
= boot_params
.sys_desc_table
.table
[0];
701 machine_submodel_id
= boot_params
.sys_desc_table
.table
[1];
702 BIOS_revision
= boot_params
.sys_desc_table
.table
[2];
705 saved_video_mode
= boot_params
.hdr
.vid_mode
;
706 bootloader_type
= boot_params
.hdr
.type_of_loader
;
708 #ifdef CONFIG_BLK_DEV_RAM
709 rd_image_start
= boot_params
.hdr
.ram_size
& RAMDISK_IMAGE_START_MASK
;
710 rd_prompt
= ((boot_params
.hdr
.ram_size
& RAMDISK_PROMPT_FLAG
) != 0);
711 rd_doload
= ((boot_params
.hdr
.ram_size
& RAMDISK_LOAD_FLAG
) != 0);
714 if (!strncmp((char *)&boot_params
.efi_info
.efi_loader_signature
,
730 /* update the e820_saved too */
731 e820_reserve_setup_data();
735 if (!boot_params
.hdr
.root_flags
)
736 root_mountflags
&= ~MS_RDONLY
;
737 init_mm
.start_code
= (unsigned long) _text
;
738 init_mm
.end_code
= (unsigned long) _etext
;
739 init_mm
.end_data
= (unsigned long) _edata
;
740 init_mm
.brk
= _brk_end
;
742 code_resource
.start
= virt_to_phys(_text
);
743 code_resource
.end
= virt_to_phys(_etext
)-1;
744 data_resource
.start
= virt_to_phys(_etext
);
745 data_resource
.end
= virt_to_phys(_edata
)-1;
746 bss_resource
.start
= virt_to_phys(&__bss_start
);
747 bss_resource
.end
= virt_to_phys(&__bss_stop
)-1;
749 #ifdef CONFIG_CMDLINE_BOOL
750 #ifdef CONFIG_CMDLINE_OVERRIDE
751 strlcpy(boot_command_line
, builtin_cmdline
, COMMAND_LINE_SIZE
);
753 if (builtin_cmdline
[0]) {
754 /* append boot loader cmdline to builtin */
755 strlcat(builtin_cmdline
, " ", COMMAND_LINE_SIZE
);
756 strlcat(builtin_cmdline
, boot_command_line
, COMMAND_LINE_SIZE
);
757 strlcpy(boot_command_line
, builtin_cmdline
, COMMAND_LINE_SIZE
);
762 strlcpy(command_line
, boot_command_line
, COMMAND_LINE_SIZE
);
763 *cmdline_p
= command_line
;
771 /* Must be before kernel pagetables are setup */
774 /* after early param, so could get panic from serial */
775 reserve_early_setup_data();
777 if (acpi_mps_check()) {
778 #ifdef CONFIG_X86_LOCAL_APIC
781 setup_clear_cpu_cap(X86_FEATURE_APIC
);
785 if (pci_early_dump_regs
)
786 early_dump_pci_devices();
789 finish_e820_parsing();
796 dmi_check_system(bad_bios_dmi_table
);
799 * VMware detection requires dmi to be available, so this
800 * needs to be done after dmi_scan_machine, for the BP.
802 init_hypervisor(&boot_cpu_data
);
808 /* after parse_early_param, so could debug it */
809 insert_resource(&iomem_resource
, &code_resource
);
810 insert_resource(&iomem_resource
, &data_resource
);
811 insert_resource(&iomem_resource
, &bss_resource
);
815 if (ppro_with_ram_bug()) {
816 e820_update_range(0x70000000ULL
, 0x40000ULL
, E820_RAM
,
818 sanitize_e820_map(e820
.map
, ARRAY_SIZE(e820
.map
), &e820
.nr_map
);
819 printk(KERN_INFO
"fixed physical RAM map:\n");
820 e820_print_map("bad_ppro");
823 early_gart_iommu_check();
827 * partially used pages are not usable - thus
828 * we are rounding upwards:
830 max_pfn
= e820_end_of_ram_pfn();
832 /* preallocate 4k for mptable mpc */
833 early_reserve_e820_mpc_new();
834 /* update e820 for memory not covered by WB MTRRs */
836 if (mtrr_trim_uncached_memory(max_pfn
))
837 max_pfn
= e820_end_of_ram_pfn();
840 /* max_low_pfn get updated here */
841 find_low_pfn_range();
843 num_physpages
= max_pfn
;
847 /* How many end-of-memory variables you have, grandma! */
848 /* need this before calling reserve_initrd */
849 if (max_pfn
> (1UL<<(32 - PAGE_SHIFT
)))
850 max_low_pfn
= e820_end_of_low_ram_pfn();
852 max_low_pfn
= max_pfn
;
854 high_memory
= (void *)__va(max_pfn
* PAGE_SIZE
- 1) + 1;
857 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
858 setup_bios_corruption_check();
863 /* max_pfn_mapped is updated here */
864 max_low_pfn_mapped
= init_memory_mapping(0, max_low_pfn
<<PAGE_SHIFT
);
865 max_pfn_mapped
= max_low_pfn_mapped
;
868 if (max_pfn
> max_low_pfn
) {
869 max_pfn_mapped
= init_memory_mapping(1UL<<32,
870 max_pfn
<<PAGE_SHIFT
);
871 /* can we preseve max_low_pfn ?*/
872 max_low_pfn
= max_pfn
;
877 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
880 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
881 if (init_ohci1394_dma_early
)
882 init_ohci1394_dma_on_all_controllers();
892 * Parse the ACPI tables for possible boot-time SMP configuration.
894 acpi_boot_table_init();
896 early_acpi_boot_init();
898 #ifdef CONFIG_ACPI_NUMA
900 * Parse SRAT to discover nodes.
905 initmem_init(0, max_pfn
);
907 #ifdef CONFIG_ACPI_SLEEP
909 * Reserve low memory region for sleep support.
911 acpi_reserve_bootmem();
914 * Find and reserve possible boot-time SMP configuration:
918 reserve_crashkernel();
922 * dma32_reserve_bootmem() allocates bootmem which may conflict
923 * with the crashkernel command line, so do that after
924 * reserve_crashkernel()
926 dma32_reserve_bootmem();
929 reserve_ibft_region();
931 #ifdef CONFIG_KVM_CLOCK
935 paravirt_pagetable_setup_start(swapper_pg_dir
);
937 paravirt_pagetable_setup_done(swapper_pg_dir
);
938 paravirt_post_allocator_init();
944 generic_apic_probe();
949 * Read APIC and some other early information from ACPI tables.
953 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
955 * get boot-time SMP configuration:
957 if (smp_found_config
)
961 prefill_possible_map();
967 init_apic_mappings();
968 ioapic_init_mappings();
970 /* need to wait for io_apic is mapped */
975 e820_reserve_resources();
976 e820_mark_nosave_regions(max_low_pfn
);
979 request_resource(&iomem_resource
, &video_ram_resource
);
981 reserve_standard_io_resources();
986 #if defined(CONFIG_VGA_CONSOLE)
987 if (!efi_enabled
|| (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY
))
988 conswitchp
= &vga_con
;
989 #elif defined(CONFIG_DUMMY_CONSOLE)
990 conswitchp
= &dummy_con
;
998 * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors
1001 * Perform any necessary interrupt initialisation prior to setting up
1002 * the "ordinary" interrupt call gates. For legacy reasons, the ISA
1003 * interrupts should be initialised here if the machine emulates a PC
1006 void __init
x86_quirk_pre_intr_init(void)
1008 if (x86_quirks
->arch_pre_intr_init
) {
1009 if (x86_quirks
->arch_pre_intr_init())
1016 * x86_quirk_intr_init - post gate setup interrupt initialisation
1019 * Fill in any interrupts that may have been left out by the general
1020 * init_IRQ() routine. interrupts having to do with the machine rather
1021 * than the devices on the I/O bus (like APIC interrupts in intel MP
1022 * systems) are started here.
1024 void __init
x86_quirk_intr_init(void)
1026 if (x86_quirks
->arch_intr_init
) {
1027 if (x86_quirks
->arch_intr_init())
1033 * x86_quirk_trap_init - initialise system specific traps
1036 * Called as the final act of trap_init(). Used in VISWS to initialise
1037 * the various board specific APIC traps.
1039 void __init
x86_quirk_trap_init(void)
1041 if (x86_quirks
->arch_trap_init
) {
1042 if (x86_quirks
->arch_trap_init())
1047 static struct irqaction irq0
= {
1048 .handler
= timer_interrupt
,
1049 .flags
= IRQF_DISABLED
| IRQF_NOBALANCING
| IRQF_IRQPOLL
| IRQF_TIMER
,
1050 .mask
= CPU_MASK_NONE
,
1055 * x86_quirk_pre_time_init - do any specific initialisations before.
1058 void __init
x86_quirk_pre_time_init(void)
1060 if (x86_quirks
->arch_pre_time_init
)
1061 x86_quirks
->arch_pre_time_init();
1065 * x86_quirk_time_init - do any specific initialisations for the system timer.
1068 * Must plug the system timer interrupt source at HZ into the IRQ listed
1069 * in irq_vectors.h:TIMER_IRQ
1071 void __init
x86_quirk_time_init(void)
1073 if (x86_quirks
->arch_time_init
) {
1075 * A nonzero return code does not mean failure, it means
1076 * that the architecture quirk does not want any
1077 * generic (timer) setup to be performed after this:
1079 if (x86_quirks
->arch_time_init())
1083 irq0
.mask
= cpumask_of_cpu(0);
1084 setup_irq(0, &irq0
);
1086 #endif /* CONFIG_X86_32 */