2 * linux/arch/arm/kernel/setup.c
4 * Copyright (C) 1995-2001 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/stddef.h>
13 #include <linux/ioport.h>
14 #include <linux/delay.h>
15 #include <linux/utsname.h>
16 #include <linux/initrd.h>
17 #include <linux/console.h>
18 #include <linux/bootmem.h>
19 #include <linux/seq_file.h>
20 #include <linux/screen_info.h>
21 #include <linux/init.h>
22 #include <linux/kexec.h>
23 #include <linux/crash_dump.h>
24 #include <linux/root_dev.h>
25 #include <linux/cpu.h>
26 #include <linux/interrupt.h>
27 #include <linux/smp.h>
29 #include <linux/proc_fs.h>
30 #include <linux/memblock.h>
32 #include <asm/unified.h>
34 #include <asm/cputype.h>
36 #include <asm/procinfo.h>
37 #include <asm/sections.h>
38 #include <asm/setup.h>
39 #include <asm/smp_plat.h>
40 #include <asm/mach-types.h>
41 #include <asm/cacheflush.h>
42 #include <asm/cachetype.h>
43 #include <asm/tlbflush.h>
45 #include <asm/mach/arch.h>
46 #include <asm/mach/irq.h>
47 #include <asm/mach/time.h>
48 #include <asm/traps.h>
49 #include <asm/unwind.h>
51 #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
58 #define MEM_SIZE (16*1024*1024)
61 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
64 static int __init
fpe_setup(char *line
)
66 memcpy(fpe_type
, line
, 8);
70 __setup("fpe=", fpe_setup
);
73 extern void paging_init(struct machine_desc
*desc
);
74 extern void reboot_setup(char *str
);
76 unsigned int processor_id
;
77 EXPORT_SYMBOL(processor_id
);
78 unsigned int __machine_arch_type __read_mostly
;
79 EXPORT_SYMBOL(__machine_arch_type
);
80 unsigned int cacheid __read_mostly
;
81 EXPORT_SYMBOL(cacheid
);
83 unsigned int __atags_pointer __initdata
;
85 unsigned int system_rev
;
86 EXPORT_SYMBOL(system_rev
);
88 unsigned int system_serial_low
;
89 EXPORT_SYMBOL(system_serial_low
);
91 unsigned int system_serial_high
;
92 EXPORT_SYMBOL(system_serial_high
);
94 unsigned int elf_hwcap __read_mostly
;
95 EXPORT_SYMBOL(elf_hwcap
);
99 struct processor processor __read_mostly
;
102 struct cpu_tlb_fns cpu_tlb __read_mostly
;
105 struct cpu_user_fns cpu_user __read_mostly
;
108 struct cpu_cache_fns cpu_cache __read_mostly
;
110 #ifdef CONFIG_OUTER_CACHE
111 struct outer_cache_fns outer_cache __read_mostly
;
112 EXPORT_SYMBOL(outer_cache
);
119 } ____cacheline_aligned
;
121 static struct stack stacks
[NR_CPUS
];
123 char elf_platform
[ELF_PLATFORM_SIZE
];
124 EXPORT_SYMBOL(elf_platform
);
126 static const char *cpu_name
;
127 static const char *machine_name
;
128 static char __initdata cmd_line
[COMMAND_LINE_SIZE
];
129 struct machine_desc
*machine_desc __initdata
;
131 static char default_command_line
[COMMAND_LINE_SIZE
] __initdata
= CONFIG_CMDLINE
;
132 static union { char c
[4]; unsigned long l
; } endian_test __initdata
= { { 'l', '?', '?', 'b' } };
133 #define ENDIANNESS ((char)endian_test.l)
135 DEFINE_PER_CPU(struct cpuinfo_arm
, cpu_data
);
138 * Standard memory resources
140 static struct resource mem_res
[] = {
145 .flags
= IORESOURCE_MEM
148 .name
= "Kernel text",
151 .flags
= IORESOURCE_MEM
154 .name
= "Kernel data",
157 .flags
= IORESOURCE_MEM
161 #define video_ram mem_res[0]
162 #define kernel_code mem_res[1]
163 #define kernel_data mem_res[2]
165 static struct resource io_res
[] = {
170 .flags
= IORESOURCE_IO
| IORESOURCE_BUSY
176 .flags
= IORESOURCE_IO
| IORESOURCE_BUSY
182 .flags
= IORESOURCE_IO
| IORESOURCE_BUSY
186 #define lp0 io_res[0]
187 #define lp1 io_res[1]
188 #define lp2 io_res[2]
190 static const char *proc_arch
[] = {
210 int cpu_architecture(void)
214 if ((read_cpuid_id() & 0x0008f000) == 0) {
215 cpu_arch
= CPU_ARCH_UNKNOWN
;
216 } else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
217 cpu_arch
= (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T
: CPU_ARCH_ARMv3
;
218 } else if ((read_cpuid_id() & 0x00080000) == 0x00000000) {
219 cpu_arch
= (read_cpuid_id() >> 16) & 7;
221 cpu_arch
+= CPU_ARCH_ARMv3
;
222 } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
225 /* Revised CPUID format. Read the Memory Model Feature
226 * Register 0 and check for VMSAv7 or PMSAv7 */
227 asm("mrc p15, 0, %0, c0, c1, 4"
229 if ((mmfr0
& 0x0000000f) >= 0x00000003 ||
230 (mmfr0
& 0x000000f0) >= 0x00000030)
231 cpu_arch
= CPU_ARCH_ARMv7
;
232 else if ((mmfr0
& 0x0000000f) == 0x00000002 ||
233 (mmfr0
& 0x000000f0) == 0x00000020)
234 cpu_arch
= CPU_ARCH_ARMv6
;
236 cpu_arch
= CPU_ARCH_UNKNOWN
;
238 cpu_arch
= CPU_ARCH_UNKNOWN
;
243 static int cpu_has_aliasing_icache(unsigned int arch
)
246 unsigned int id_reg
, num_sets
, line_size
;
248 /* arch specifies the register format */
251 asm("mcr p15, 2, %0, c0, c0, 0 @ set CSSELR"
252 : /* No output operands */
255 asm("mrc p15, 1, %0, c0, c0, 0 @ read CCSIDR"
257 line_size
= 4 << ((id_reg
& 0x7) + 2);
258 num_sets
= ((id_reg
>> 13) & 0x7fff) + 1;
259 aliasing_icache
= (line_size
* num_sets
) > PAGE_SIZE
;
262 aliasing_icache
= read_cpuid_cachetype() & (1 << 11);
265 /* I-cache aliases will be handled by D-cache aliasing code */
269 return aliasing_icache
;
272 static void __init
cacheid_init(void)
274 unsigned int cachetype
= read_cpuid_cachetype();
275 unsigned int arch
= cpu_architecture();
277 if (arch
>= CPU_ARCH_ARMv6
) {
278 if ((cachetype
& (7 << 29)) == 4 << 29) {
279 /* ARMv7 register format */
280 cacheid
= CACHEID_VIPT_NONALIASING
;
281 if ((cachetype
& (3 << 14)) == 1 << 14)
282 cacheid
|= CACHEID_ASID_TAGGED
;
283 else if (cpu_has_aliasing_icache(CPU_ARCH_ARMv7
))
284 cacheid
|= CACHEID_VIPT_I_ALIASING
;
285 } else if (cachetype
& (1 << 23)) {
286 cacheid
= CACHEID_VIPT_ALIASING
;
288 cacheid
= CACHEID_VIPT_NONALIASING
;
289 if (cpu_has_aliasing_icache(CPU_ARCH_ARMv6
))
290 cacheid
|= CACHEID_VIPT_I_ALIASING
;
293 cacheid
= CACHEID_VIVT
;
296 printk("CPU: %s data cache, %s instruction cache\n",
297 cache_is_vivt() ? "VIVT" :
298 cache_is_vipt_aliasing() ? "VIPT aliasing" :
299 cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown",
300 cache_is_vivt() ? "VIVT" :
301 icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" :
302 icache_is_vipt_aliasing() ? "VIPT aliasing" :
303 cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown");
307 * These functions re-use the assembly code in head.S, which
308 * already provide the required functionality.
310 extern struct proc_info_list
*lookup_processor_type(unsigned int);
312 static void __init
early_print(const char *str
, ...)
314 extern void printascii(const char *);
319 vsnprintf(buf
, sizeof(buf
), str
, ap
);
322 #ifdef CONFIG_DEBUG_LL
328 static void __init
feat_v6_fixup(void)
330 int id
= read_cpuid_id();
332 if ((id
& 0xff0f0000) != 0x41070000)
336 * HWCAP_TLS is available only on 1136 r1p0 and later,
337 * see also kuser_get_tls_init.
339 if ((((id
>> 4) & 0xfff) == 0xb36) && (((id
>> 20) & 3) == 0))
340 elf_hwcap
&= ~HWCAP_TLS
;
343 static void __init
setup_processor(void)
345 struct proc_info_list
*list
;
348 * locate processor in the list of supported processor
349 * types. The linker builds this table for us from the
350 * entries in arch/arm/mm/proc-*.S
352 list
= lookup_processor_type(read_cpuid_id());
354 printk("CPU configuration botched (ID %08x), unable "
355 "to continue.\n", read_cpuid_id());
359 cpu_name
= list
->cpu_name
;
362 processor
= *list
->proc
;
365 cpu_tlb
= *list
->tlb
;
368 cpu_user
= *list
->user
;
371 cpu_cache
= *list
->cache
;
374 printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
375 cpu_name
, read_cpuid_id(), read_cpuid_id() & 15,
376 proc_arch
[cpu_architecture()], cr_alignment
);
378 sprintf(init_utsname()->machine
, "%s%c", list
->arch_name
, ENDIANNESS
);
379 sprintf(elf_platform
, "%s%c", list
->elf_name
, ENDIANNESS
);
380 elf_hwcap
= list
->elf_hwcap
;
381 #ifndef CONFIG_ARM_THUMB
382 elf_hwcap
&= ~HWCAP_THUMB
;
392 * cpu_init - initialise one CPU.
394 * cpu_init sets up the per-CPU stacks.
398 unsigned int cpu
= smp_processor_id();
399 struct stack
*stk
= &stacks
[cpu
];
401 if (cpu
>= NR_CPUS
) {
402 printk(KERN_CRIT
"CPU%u: bad primary CPU number\n", cpu
);
407 * Define the placement constraint for the inline asm directive below.
408 * In Thumb-2, msr with an immediate value is not allowed.
410 #ifdef CONFIG_THUMB2_KERNEL
417 * setup stacks for re-entrant exception handlers
421 "add r14, %0, %2\n\t"
424 "add r14, %0, %4\n\t"
427 "add r14, %0, %6\n\t"
432 PLC (PSR_F_BIT
| PSR_I_BIT
| IRQ_MODE
),
433 "I" (offsetof(struct stack
, irq
[0])),
434 PLC (PSR_F_BIT
| PSR_I_BIT
| ABT_MODE
),
435 "I" (offsetof(struct stack
, abt
[0])),
436 PLC (PSR_F_BIT
| PSR_I_BIT
| UND_MODE
),
437 "I" (offsetof(struct stack
, und
[0])),
438 PLC (PSR_F_BIT
| PSR_I_BIT
| SVC_MODE
)
442 static struct machine_desc
* __init
setup_machine(unsigned int nr
)
444 extern struct machine_desc __arch_info_begin
[], __arch_info_end
[];
445 struct machine_desc
*p
;
448 * locate machine in the list of supported machines.
450 for (p
= __arch_info_begin
; p
< __arch_info_end
; p
++)
452 printk("Machine: %s\n", p
->name
);
457 "Error: unrecognized/unsupported machine ID (r1 = 0x%08x).\n\n"
458 "Available machine support:\n\nID (hex)\tNAME\n", nr
);
460 for (p
= __arch_info_begin
; p
< __arch_info_end
; p
++)
461 early_print("%08x\t%s\n", p
->nr
, p
->name
);
463 early_print("\nPlease check your kernel config and/or bootloader.\n");
466 /* can't use cpu_relax() here as it may require MMU setup */;
469 static int __init
arm_add_memory(phys_addr_t start
, unsigned long size
)
471 struct membank
*bank
= &meminfo
.bank
[meminfo
.nr_banks
];
473 if (meminfo
.nr_banks
>= NR_BANKS
) {
474 printk(KERN_CRIT
"NR_BANKS too low, "
475 "ignoring memory at 0x%08llx\n", (long long)start
);
480 * Ensure that start/size are aligned to a page boundary.
481 * Size is appropriately rounded down, start is rounded up.
483 size
-= start
& ~PAGE_MASK
;
484 bank
->start
= PAGE_ALIGN(start
);
485 bank
->size
= size
& PAGE_MASK
;
488 * Check whether this memory region has non-zero size or
489 * invalid node number.
499 * Pick out the memory size. We look for mem=size@start,
500 * where start and size are "size[KkMm]"
502 static int __init
early_mem(char *p
)
504 static int usermem __initdata
= 0;
510 * If the user specifies memory size, we
511 * blow away any automatically generated
516 meminfo
.nr_banks
= 0;
520 size
= memparse(p
, &endp
);
522 start
= memparse(endp
+ 1, NULL
);
524 arm_add_memory(start
, size
);
528 early_param("mem", early_mem
);
531 setup_ramdisk(int doload
, int prompt
, int image_start
, unsigned int rd_sz
)
533 #ifdef CONFIG_BLK_DEV_RAM
534 extern int rd_size
, rd_image_start
, rd_prompt
, rd_doload
;
536 rd_image_start
= image_start
;
545 static void __init
request_standard_resources(struct machine_desc
*mdesc
)
547 struct memblock_region
*region
;
548 struct resource
*res
;
550 kernel_code
.start
= virt_to_phys(_text
);
551 kernel_code
.end
= virt_to_phys(_etext
- 1);
552 kernel_data
.start
= virt_to_phys(_sdata
);
553 kernel_data
.end
= virt_to_phys(_end
- 1);
555 for_each_memblock(memory
, region
) {
556 res
= alloc_bootmem_low(sizeof(*res
));
557 res
->name
= "System RAM";
558 res
->start
= __pfn_to_phys(memblock_region_memory_base_pfn(region
));
559 res
->end
= __pfn_to_phys(memblock_region_memory_end_pfn(region
)) - 1;
560 res
->flags
= IORESOURCE_MEM
| IORESOURCE_BUSY
;
562 request_resource(&iomem_resource
, res
);
564 if (kernel_code
.start
>= res
->start
&&
565 kernel_code
.end
<= res
->end
)
566 request_resource(res
, &kernel_code
);
567 if (kernel_data
.start
>= res
->start
&&
568 kernel_data
.end
<= res
->end
)
569 request_resource(res
, &kernel_data
);
572 if (mdesc
->video_start
) {
573 video_ram
.start
= mdesc
->video_start
;
574 video_ram
.end
= mdesc
->video_end
;
575 request_resource(&iomem_resource
, &video_ram
);
579 * Some machines don't have the possibility of ever
580 * possessing lp0, lp1 or lp2
582 if (mdesc
->reserve_lp0
)
583 request_resource(&ioport_resource
, &lp0
);
584 if (mdesc
->reserve_lp1
)
585 request_resource(&ioport_resource
, &lp1
);
586 if (mdesc
->reserve_lp2
)
587 request_resource(&ioport_resource
, &lp2
);
593 * This is the new way of passing data to the kernel at boot time. Rather
594 * than passing a fixed inflexible structure to the kernel, we pass a list
595 * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
596 * tag for the list to be recognised (to distinguish the tagged list from
597 * a param_struct). The list is terminated with a zero-length tag (this tag
598 * is not parsed in any way).
600 static int __init
parse_tag_core(const struct tag
*tag
)
602 if (tag
->hdr
.size
> 2) {
603 if ((tag
->u
.core
.flags
& 1) == 0)
604 root_mountflags
&= ~MS_RDONLY
;
605 ROOT_DEV
= old_decode_dev(tag
->u
.core
.rootdev
);
610 __tagtable(ATAG_CORE
, parse_tag_core
);
612 static int __init
parse_tag_mem32(const struct tag
*tag
)
614 return arm_add_memory(tag
->u
.mem
.start
, tag
->u
.mem
.size
);
617 __tagtable(ATAG_MEM
, parse_tag_mem32
);
619 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
620 struct screen_info screen_info
= {
621 .orig_video_lines
= 30,
622 .orig_video_cols
= 80,
623 .orig_video_mode
= 0,
624 .orig_video_ega_bx
= 0,
625 .orig_video_isVGA
= 1,
626 .orig_video_points
= 8
629 static int __init
parse_tag_videotext(const struct tag
*tag
)
631 screen_info
.orig_x
= tag
->u
.videotext
.x
;
632 screen_info
.orig_y
= tag
->u
.videotext
.y
;
633 screen_info
.orig_video_page
= tag
->u
.videotext
.video_page
;
634 screen_info
.orig_video_mode
= tag
->u
.videotext
.video_mode
;
635 screen_info
.orig_video_cols
= tag
->u
.videotext
.video_cols
;
636 screen_info
.orig_video_ega_bx
= tag
->u
.videotext
.video_ega_bx
;
637 screen_info
.orig_video_lines
= tag
->u
.videotext
.video_lines
;
638 screen_info
.orig_video_isVGA
= tag
->u
.videotext
.video_isvga
;
639 screen_info
.orig_video_points
= tag
->u
.videotext
.video_points
;
643 __tagtable(ATAG_VIDEOTEXT
, parse_tag_videotext
);
646 static int __init
parse_tag_ramdisk(const struct tag
*tag
)
648 setup_ramdisk((tag
->u
.ramdisk
.flags
& 1) == 0,
649 (tag
->u
.ramdisk
.flags
& 2) == 0,
650 tag
->u
.ramdisk
.start
, tag
->u
.ramdisk
.size
);
654 __tagtable(ATAG_RAMDISK
, parse_tag_ramdisk
);
656 static int __init
parse_tag_serialnr(const struct tag
*tag
)
658 system_serial_low
= tag
->u
.serialnr
.low
;
659 system_serial_high
= tag
->u
.serialnr
.high
;
663 __tagtable(ATAG_SERIAL
, parse_tag_serialnr
);
665 static int __init
parse_tag_revision(const struct tag
*tag
)
667 system_rev
= tag
->u
.revision
.rev
;
671 __tagtable(ATAG_REVISION
, parse_tag_revision
);
673 static int __init
parse_tag_cmdline(const struct tag
*tag
)
675 #ifndef CONFIG_CMDLINE_FORCE
676 strlcpy(default_command_line
, tag
->u
.cmdline
.cmdline
, COMMAND_LINE_SIZE
);
678 pr_warning("Ignoring tag cmdline (using the default kernel command line)\n");
679 #endif /* CONFIG_CMDLINE_FORCE */
683 __tagtable(ATAG_CMDLINE
, parse_tag_cmdline
);
686 * Scan the tag table for this tag, and call its parse function.
687 * The tag table is built by the linker from all the __tagtable
690 static int __init
parse_tag(const struct tag
*tag
)
692 extern struct tagtable __tagtable_begin
, __tagtable_end
;
695 for (t
= &__tagtable_begin
; t
< &__tagtable_end
; t
++)
696 if (tag
->hdr
.tag
== t
->tag
) {
701 return t
< &__tagtable_end
;
705 * Parse all tags in the list, checking both the global and architecture
706 * specific tag tables.
708 static void __init
parse_tags(const struct tag
*t
)
710 for (; t
->hdr
.size
; t
= tag_next(t
))
713 "Ignoring unrecognised tag 0x%08x\n",
718 * This holds our defaults.
720 static struct init_tags
{
721 struct tag_header hdr1
;
722 struct tag_core core
;
723 struct tag_header hdr2
;
724 struct tag_mem32 mem
;
725 struct tag_header hdr3
;
726 } init_tags __initdata
= {
727 { tag_size(tag_core
), ATAG_CORE
},
728 { 1, PAGE_SIZE
, 0xff },
729 { tag_size(tag_mem32
), ATAG_MEM
},
734 static int __init
customize_machine(void)
736 /* customizes platform devices, or adds new ones */
737 if (machine_desc
->init_machine
)
738 machine_desc
->init_machine();
741 arch_initcall(customize_machine
);
744 static inline unsigned long long get_total_mem(void)
748 total
= max_low_pfn
- min_low_pfn
;
749 return total
<< PAGE_SHIFT
;
753 * reserve_crashkernel() - reserves memory are for crash kernel
755 * This function reserves memory area given in "crashkernel=" kernel command
756 * line parameter. The memory reserved is used by a dump capture kernel when
757 * primary kernel is crashing.
759 static void __init
reserve_crashkernel(void)
761 unsigned long long crash_size
, crash_base
;
762 unsigned long long total_mem
;
765 total_mem
= get_total_mem();
766 ret
= parse_crashkernel(boot_command_line
, total_mem
,
767 &crash_size
, &crash_base
);
771 ret
= reserve_bootmem(crash_base
, crash_size
, BOOTMEM_EXCLUSIVE
);
773 printk(KERN_WARNING
"crashkernel reservation failed - "
774 "memory is in use (0x%lx)\n", (unsigned long)crash_base
);
778 printk(KERN_INFO
"Reserving %ldMB of memory at %ldMB "
779 "for crashkernel (System RAM: %ldMB)\n",
780 (unsigned long)(crash_size
>> 20),
781 (unsigned long)(crash_base
>> 20),
782 (unsigned long)(total_mem
>> 20));
784 crashk_res
.start
= crash_base
;
785 crashk_res
.end
= crash_base
+ crash_size
- 1;
786 insert_resource(&iomem_resource
, &crashk_res
);
789 static inline void reserve_crashkernel(void) {}
790 #endif /* CONFIG_KEXEC */
792 static void __init
squash_mem_tags(struct tag
*tag
)
794 for (; tag
->hdr
.size
; tag
= tag_next(tag
))
795 if (tag
->hdr
.tag
== ATAG_MEM
)
796 tag
->hdr
.tag
= ATAG_NONE
;
799 void __init
setup_arch(char **cmdline_p
)
801 struct tag
*tags
= (struct tag
*)&init_tags
;
802 struct machine_desc
*mdesc
;
803 char *from
= default_command_line
;
805 init_tags
.mem
.start
= PHYS_OFFSET
;
810 mdesc
= setup_machine(machine_arch_type
);
811 machine_desc
= mdesc
;
812 machine_name
= mdesc
->name
;
814 if (mdesc
->soft_reboot
)
818 tags
= phys_to_virt(__atags_pointer
);
819 else if (mdesc
->boot_params
) {
822 * We still are executing with a minimal MMU mapping created
823 * with the presumption that the machine default for this
824 * is located in the first MB of RAM. Anything else will
825 * fault and silently hang the kernel at this point.
827 if (mdesc
->boot_params
< PHYS_OFFSET
||
828 mdesc
->boot_params
>= PHYS_OFFSET
+ SZ_1M
) {
830 "Default boot params at physical 0x%08lx out of reach\n",
835 tags
= phys_to_virt(mdesc
->boot_params
);
839 #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
841 * If we have the old style parameters, convert them to
844 if (tags
->hdr
.tag
!= ATAG_CORE
)
845 convert_to_tag_list(tags
);
847 if (tags
->hdr
.tag
!= ATAG_CORE
)
848 tags
= (struct tag
*)&init_tags
;
851 mdesc
->fixup(mdesc
, tags
, &from
, &meminfo
);
853 if (tags
->hdr
.tag
== ATAG_CORE
) {
854 if (meminfo
.nr_banks
!= 0)
855 squash_mem_tags(tags
);
860 init_mm
.start_code
= (unsigned long) _text
;
861 init_mm
.end_code
= (unsigned long) _etext
;
862 init_mm
.end_data
= (unsigned long) _edata
;
863 init_mm
.brk
= (unsigned long) _end
;
865 /* parse_early_param needs a boot_command_line */
866 strlcpy(boot_command_line
, from
, COMMAND_LINE_SIZE
);
868 /* populate cmd_line too for later use, preserving boot_command_line */
869 strlcpy(cmd_line
, boot_command_line
, COMMAND_LINE_SIZE
);
870 *cmdline_p
= cmd_line
;
874 arm_memblock_init(&meminfo
, mdesc
);
877 request_standard_resources(mdesc
);
883 reserve_crashkernel();
888 #ifdef CONFIG_MULTI_IRQ_HANDLER
889 handle_arch_irq
= mdesc
->handle_irq
;
893 #if defined(CONFIG_VGA_CONSOLE)
894 conswitchp
= &vga_con
;
895 #elif defined(CONFIG_DUMMY_CONSOLE)
896 conswitchp
= &dummy_con
;
901 if (mdesc
->init_early
)
906 static int __init
topology_init(void)
910 for_each_possible_cpu(cpu
) {
911 struct cpuinfo_arm
*cpuinfo
= &per_cpu(cpu_data
, cpu
);
912 cpuinfo
->cpu
.hotpluggable
= 1;
913 register_cpu(&cpuinfo
->cpu
, cpu
);
918 subsys_initcall(topology_init
);
920 #ifdef CONFIG_HAVE_PROC_CPU
921 static int __init
proc_cpu_init(void)
923 struct proc_dir_entry
*res
;
925 res
= proc_mkdir("cpu", NULL
);
930 fs_initcall(proc_cpu_init
);
933 static const char *hwcap_str
[] = {
952 static int c_show(struct seq_file
*m
, void *v
)
956 seq_printf(m
, "Processor\t: %s rev %d (%s)\n",
957 cpu_name
, read_cpuid_id() & 15, elf_platform
);
959 #if defined(CONFIG_SMP)
960 for_each_online_cpu(i
) {
962 * glibc reads /proc/cpuinfo to determine the number of
963 * online processors, looking for lines beginning with
964 * "processor". Give glibc what it expects.
966 seq_printf(m
, "processor\t: %d\n", i
);
967 seq_printf(m
, "BogoMIPS\t: %lu.%02lu\n\n",
968 per_cpu(cpu_data
, i
).loops_per_jiffy
/ (500000UL/HZ
),
969 (per_cpu(cpu_data
, i
).loops_per_jiffy
/ (5000UL/HZ
)) % 100);
971 #else /* CONFIG_SMP */
972 seq_printf(m
, "BogoMIPS\t: %lu.%02lu\n",
973 loops_per_jiffy
/ (500000/HZ
),
974 (loops_per_jiffy
/ (5000/HZ
)) % 100);
977 /* dump out the processor features */
978 seq_puts(m
, "Features\t: ");
980 for (i
= 0; hwcap_str
[i
]; i
++)
981 if (elf_hwcap
& (1 << i
))
982 seq_printf(m
, "%s ", hwcap_str
[i
]);
984 seq_printf(m
, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
985 seq_printf(m
, "CPU architecture: %s\n", proc_arch
[cpu_architecture()]);
987 if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
989 seq_printf(m
, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
991 if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
993 seq_printf(m
, "CPU variant\t: 0x%02x\n",
994 (read_cpuid_id() >> 16) & 127);
997 seq_printf(m
, "CPU variant\t: 0x%x\n",
998 (read_cpuid_id() >> 20) & 15);
1000 seq_printf(m
, "CPU part\t: 0x%03x\n",
1001 (read_cpuid_id() >> 4) & 0xfff);
1003 seq_printf(m
, "CPU revision\t: %d\n", read_cpuid_id() & 15);
1007 seq_printf(m
, "Hardware\t: %s\n", machine_name
);
1008 seq_printf(m
, "Revision\t: %04x\n", system_rev
);
1009 seq_printf(m
, "Serial\t\t: %08x%08x\n",
1010 system_serial_high
, system_serial_low
);
1015 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
1017 return *pos
< 1 ? (void *)1 : NULL
;
1020 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
1026 static void c_stop(struct seq_file
*m
, void *v
)
1030 const struct seq_operations cpuinfo_op
= {