Merge branch 'for-davem' of ssh://master.kernel.org/pub/scm/linux/kernel/git/linville...
[linux-2.6.git] / arch / arm / kernel / setup.c
1 /*
2  *  linux/arch/arm/kernel/setup.c
3  *
4  *  Copyright (C) 1995-2001 Russell King
5  *
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.
9  */
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>
28 #include <linux/fs.h>
29 #include <linux/proc_fs.h>
30 #include <linux/memblock.h>
31
32 #include <asm/unified.h>
33 #include <asm/cpu.h>
34 #include <asm/cputype.h>
35 #include <asm/elf.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>
44
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>
50
51 #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
52 #include "compat.h"
53 #endif
54 #include "atags.h"
55 #include "tcm.h"
56
57 #ifndef MEM_SIZE
58 #define MEM_SIZE        (16*1024*1024)
59 #endif
60
61 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
62 char fpe_type[8];
63
64 static int __init fpe_setup(char *line)
65 {
66         memcpy(fpe_type, line, 8);
67         return 1;
68 }
69
70 __setup("fpe=", fpe_setup);
71 #endif
72
73 extern void paging_init(struct machine_desc *desc);
74 extern void reboot_setup(char *str);
75
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);
82
83 unsigned int __atags_pointer __initdata;
84
85 unsigned int system_rev;
86 EXPORT_SYMBOL(system_rev);
87
88 unsigned int system_serial_low;
89 EXPORT_SYMBOL(system_serial_low);
90
91 unsigned int system_serial_high;
92 EXPORT_SYMBOL(system_serial_high);
93
94 unsigned int elf_hwcap __read_mostly;
95 EXPORT_SYMBOL(elf_hwcap);
96
97
98 #ifdef MULTI_CPU
99 struct processor processor __read_mostly;
100 #endif
101 #ifdef MULTI_TLB
102 struct cpu_tlb_fns cpu_tlb __read_mostly;
103 #endif
104 #ifdef MULTI_USER
105 struct cpu_user_fns cpu_user __read_mostly;
106 #endif
107 #ifdef MULTI_CACHE
108 struct cpu_cache_fns cpu_cache __read_mostly;
109 #endif
110 #ifdef CONFIG_OUTER_CACHE
111 struct outer_cache_fns outer_cache __read_mostly;
112 EXPORT_SYMBOL(outer_cache);
113 #endif
114
115 struct stack {
116         u32 irq[3];
117         u32 abt[3];
118         u32 und[3];
119 } ____cacheline_aligned;
120
121 static struct stack stacks[NR_CPUS];
122
123 char elf_platform[ELF_PLATFORM_SIZE];
124 EXPORT_SYMBOL(elf_platform);
125
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;
130
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)
134
135 DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
136
137 /*
138  * Standard memory resources
139  */
140 static struct resource mem_res[] = {
141         {
142                 .name = "Video RAM",
143                 .start = 0,
144                 .end = 0,
145                 .flags = IORESOURCE_MEM
146         },
147         {
148                 .name = "Kernel text",
149                 .start = 0,
150                 .end = 0,
151                 .flags = IORESOURCE_MEM
152         },
153         {
154                 .name = "Kernel data",
155                 .start = 0,
156                 .end = 0,
157                 .flags = IORESOURCE_MEM
158         }
159 };
160
161 #define video_ram   mem_res[0]
162 #define kernel_code mem_res[1]
163 #define kernel_data mem_res[2]
164
165 static struct resource io_res[] = {
166         {
167                 .name = "reserved",
168                 .start = 0x3bc,
169                 .end = 0x3be,
170                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
171         },
172         {
173                 .name = "reserved",
174                 .start = 0x378,
175                 .end = 0x37f,
176                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
177         },
178         {
179                 .name = "reserved",
180                 .start = 0x278,
181                 .end = 0x27f,
182                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
183         }
184 };
185
186 #define lp0 io_res[0]
187 #define lp1 io_res[1]
188 #define lp2 io_res[2]
189
190 static const char *proc_arch[] = {
191         "undefined/unknown",
192         "3",
193         "4",
194         "4T",
195         "5",
196         "5T",
197         "5TE",
198         "5TEJ",
199         "6TEJ",
200         "7",
201         "?(11)",
202         "?(12)",
203         "?(13)",
204         "?(14)",
205         "?(15)",
206         "?(16)",
207         "?(17)",
208 };
209
210 int cpu_architecture(void)
211 {
212         int cpu_arch;
213
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;
220                 if (cpu_arch)
221                         cpu_arch += CPU_ARCH_ARMv3;
222         } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
223                 unsigned int mmfr0;
224
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"
228                     : "=r" (mmfr0));
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;
235                 else
236                         cpu_arch = CPU_ARCH_UNKNOWN;
237         } else
238                 cpu_arch = CPU_ARCH_UNKNOWN;
239
240         return cpu_arch;
241 }
242
243 static int cpu_has_aliasing_icache(unsigned int arch)
244 {
245         int aliasing_icache;
246         unsigned int id_reg, num_sets, line_size;
247
248         /* arch specifies the register format */
249         switch (arch) {
250         case CPU_ARCH_ARMv7:
251                 asm("mcr        p15, 2, %0, c0, c0, 0 @ set CSSELR"
252                     : /* No output operands */
253                     : "r" (1));
254                 isb();
255                 asm("mrc        p15, 1, %0, c0, c0, 0 @ read CCSIDR"
256                     : "=r" (id_reg));
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;
260                 break;
261         case CPU_ARCH_ARMv6:
262                 aliasing_icache = read_cpuid_cachetype() & (1 << 11);
263                 break;
264         default:
265                 /* I-cache aliases will be handled by D-cache aliasing code */
266                 aliasing_icache = 0;
267         }
268
269         return aliasing_icache;
270 }
271
272 static void __init cacheid_init(void)
273 {
274         unsigned int cachetype = read_cpuid_cachetype();
275         unsigned int arch = cpu_architecture();
276
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;
287                 } else {
288                         cacheid = CACHEID_VIPT_NONALIASING;
289                         if (cpu_has_aliasing_icache(CPU_ARCH_ARMv6))
290                                 cacheid |= CACHEID_VIPT_I_ALIASING;
291                 }
292         } else {
293                 cacheid = CACHEID_VIVT;
294         }
295
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");
304 }
305
306 /*
307  * These functions re-use the assembly code in head.S, which
308  * already provide the required functionality.
309  */
310 extern struct proc_info_list *lookup_processor_type(unsigned int);
311 extern struct machine_desc *lookup_machine_type(unsigned int);
312
313 static void __init feat_v6_fixup(void)
314 {
315         int id = read_cpuid_id();
316
317         if ((id & 0xff0f0000) != 0x41070000)
318                 return;
319
320         /*
321          * HWCAP_TLS is available only on 1136 r1p0 and later,
322          * see also kuser_get_tls_init.
323          */
324         if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0))
325                 elf_hwcap &= ~HWCAP_TLS;
326 }
327
328 static void __init setup_processor(void)
329 {
330         struct proc_info_list *list;
331
332         /*
333          * locate processor in the list of supported processor
334          * types.  The linker builds this table for us from the
335          * entries in arch/arm/mm/proc-*.S
336          */
337         list = lookup_processor_type(read_cpuid_id());
338         if (!list) {
339                 printk("CPU configuration botched (ID %08x), unable "
340                        "to continue.\n", read_cpuid_id());
341                 while (1);
342         }
343
344         cpu_name = list->cpu_name;
345
346 #ifdef MULTI_CPU
347         processor = *list->proc;
348 #endif
349 #ifdef MULTI_TLB
350         cpu_tlb = *list->tlb;
351 #endif
352 #ifdef MULTI_USER
353         cpu_user = *list->user;
354 #endif
355 #ifdef MULTI_CACHE
356         cpu_cache = *list->cache;
357 #endif
358
359         printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
360                cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
361                proc_arch[cpu_architecture()], cr_alignment);
362
363         sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
364         sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
365         elf_hwcap = list->elf_hwcap;
366 #ifndef CONFIG_ARM_THUMB
367         elf_hwcap &= ~HWCAP_THUMB;
368 #endif
369
370         feat_v6_fixup();
371
372         cacheid_init();
373         cpu_proc_init();
374 }
375
376 /*
377  * cpu_init - initialise one CPU.
378  *
379  * cpu_init sets up the per-CPU stacks.
380  */
381 void cpu_init(void)
382 {
383         unsigned int cpu = smp_processor_id();
384         struct stack *stk = &stacks[cpu];
385
386         if (cpu >= NR_CPUS) {
387                 printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
388                 BUG();
389         }
390
391         /*
392          * Define the placement constraint for the inline asm directive below.
393          * In Thumb-2, msr with an immediate value is not allowed.
394          */
395 #ifdef CONFIG_THUMB2_KERNEL
396 #define PLC     "r"
397 #else
398 #define PLC     "I"
399 #endif
400
401         /*
402          * setup stacks for re-entrant exception handlers
403          */
404         __asm__ (
405         "msr    cpsr_c, %1\n\t"
406         "add    r14, %0, %2\n\t"
407         "mov    sp, r14\n\t"
408         "msr    cpsr_c, %3\n\t"
409         "add    r14, %0, %4\n\t"
410         "mov    sp, r14\n\t"
411         "msr    cpsr_c, %5\n\t"
412         "add    r14, %0, %6\n\t"
413         "mov    sp, r14\n\t"
414         "msr    cpsr_c, %7"
415             :
416             : "r" (stk),
417               PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
418               "I" (offsetof(struct stack, irq[0])),
419               PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
420               "I" (offsetof(struct stack, abt[0])),
421               PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE),
422               "I" (offsetof(struct stack, und[0])),
423               PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
424             : "r14");
425 }
426
427 static struct machine_desc * __init setup_machine(unsigned int nr)
428 {
429         struct machine_desc *list;
430
431         /*
432          * locate machine in the list of supported machines.
433          */
434         list = lookup_machine_type(nr);
435         if (!list) {
436                 printk("Machine configuration botched (nr %d), unable "
437                        "to continue.\n", nr);
438                 while (1);
439         }
440
441         printk("Machine: %s\n", list->name);
442
443         return list;
444 }
445
446 static int __init arm_add_memory(unsigned long start, unsigned long size)
447 {
448         struct membank *bank = &meminfo.bank[meminfo.nr_banks];
449
450         if (meminfo.nr_banks >= NR_BANKS) {
451                 printk(KERN_CRIT "NR_BANKS too low, "
452                         "ignoring memory at %#lx\n", start);
453                 return -EINVAL;
454         }
455
456         /*
457          * Ensure that start/size are aligned to a page boundary.
458          * Size is appropriately rounded down, start is rounded up.
459          */
460         size -= start & ~PAGE_MASK;
461         bank->start = PAGE_ALIGN(start);
462         bank->size  = size & PAGE_MASK;
463
464         /*
465          * Check whether this memory region has non-zero size or
466          * invalid node number.
467          */
468         if (bank->size == 0)
469                 return -EINVAL;
470
471         meminfo.nr_banks++;
472         return 0;
473 }
474
475 /*
476  * Pick out the memory size.  We look for mem=size@start,
477  * where start and size are "size[KkMm]"
478  */
479 static int __init early_mem(char *p)
480 {
481         static int usermem __initdata = 0;
482         unsigned long size, start;
483         char *endp;
484
485         /*
486          * If the user specifies memory size, we
487          * blow away any automatically generated
488          * size.
489          */
490         if (usermem == 0) {
491                 usermem = 1;
492                 meminfo.nr_banks = 0;
493         }
494
495         start = PHYS_OFFSET;
496         size  = memparse(p, &endp);
497         if (*endp == '@')
498                 start = memparse(endp + 1, NULL);
499
500         arm_add_memory(start, size);
501
502         return 0;
503 }
504 early_param("mem", early_mem);
505
506 static void __init
507 setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
508 {
509 #ifdef CONFIG_BLK_DEV_RAM
510         extern int rd_size, rd_image_start, rd_prompt, rd_doload;
511
512         rd_image_start = image_start;
513         rd_prompt = prompt;
514         rd_doload = doload;
515
516         if (rd_sz)
517                 rd_size = rd_sz;
518 #endif
519 }
520
521 static void __init request_standard_resources(struct machine_desc *mdesc)
522 {
523         struct memblock_region *region;
524         struct resource *res;
525
526         kernel_code.start   = virt_to_phys(_text);
527         kernel_code.end     = virt_to_phys(_etext - 1);
528         kernel_data.start   = virt_to_phys(_sdata);
529         kernel_data.end     = virt_to_phys(_end - 1);
530
531         for_each_memblock(memory, region) {
532                 res = alloc_bootmem_low(sizeof(*res));
533                 res->name  = "System RAM";
534                 res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
535                 res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
536                 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
537
538                 request_resource(&iomem_resource, res);
539
540                 if (kernel_code.start >= res->start &&
541                     kernel_code.end <= res->end)
542                         request_resource(res, &kernel_code);
543                 if (kernel_data.start >= res->start &&
544                     kernel_data.end <= res->end)
545                         request_resource(res, &kernel_data);
546         }
547
548         if (mdesc->video_start) {
549                 video_ram.start = mdesc->video_start;
550                 video_ram.end   = mdesc->video_end;
551                 request_resource(&iomem_resource, &video_ram);
552         }
553
554         /*
555          * Some machines don't have the possibility of ever
556          * possessing lp0, lp1 or lp2
557          */
558         if (mdesc->reserve_lp0)
559                 request_resource(&ioport_resource, &lp0);
560         if (mdesc->reserve_lp1)
561                 request_resource(&ioport_resource, &lp1);
562         if (mdesc->reserve_lp2)
563                 request_resource(&ioport_resource, &lp2);
564 }
565
566 /*
567  *  Tag parsing.
568  *
569  * This is the new way of passing data to the kernel at boot time.  Rather
570  * than passing a fixed inflexible structure to the kernel, we pass a list
571  * of variable-sized tags to the kernel.  The first tag must be a ATAG_CORE
572  * tag for the list to be recognised (to distinguish the tagged list from
573  * a param_struct).  The list is terminated with a zero-length tag (this tag
574  * is not parsed in any way).
575  */
576 static int __init parse_tag_core(const struct tag *tag)
577 {
578         if (tag->hdr.size > 2) {
579                 if ((tag->u.core.flags & 1) == 0)
580                         root_mountflags &= ~MS_RDONLY;
581                 ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
582         }
583         return 0;
584 }
585
586 __tagtable(ATAG_CORE, parse_tag_core);
587
588 static int __init parse_tag_mem32(const struct tag *tag)
589 {
590         return arm_add_memory(tag->u.mem.start, tag->u.mem.size);
591 }
592
593 __tagtable(ATAG_MEM, parse_tag_mem32);
594
595 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
596 struct screen_info screen_info = {
597  .orig_video_lines      = 30,
598  .orig_video_cols       = 80,
599  .orig_video_mode       = 0,
600  .orig_video_ega_bx     = 0,
601  .orig_video_isVGA      = 1,
602  .orig_video_points     = 8
603 };
604
605 static int __init parse_tag_videotext(const struct tag *tag)
606 {
607         screen_info.orig_x            = tag->u.videotext.x;
608         screen_info.orig_y            = tag->u.videotext.y;
609         screen_info.orig_video_page   = tag->u.videotext.video_page;
610         screen_info.orig_video_mode   = tag->u.videotext.video_mode;
611         screen_info.orig_video_cols   = tag->u.videotext.video_cols;
612         screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
613         screen_info.orig_video_lines  = tag->u.videotext.video_lines;
614         screen_info.orig_video_isVGA  = tag->u.videotext.video_isvga;
615         screen_info.orig_video_points = tag->u.videotext.video_points;
616         return 0;
617 }
618
619 __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
620 #endif
621
622 static int __init parse_tag_ramdisk(const struct tag *tag)
623 {
624         setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
625                       (tag->u.ramdisk.flags & 2) == 0,
626                       tag->u.ramdisk.start, tag->u.ramdisk.size);
627         return 0;
628 }
629
630 __tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
631
632 static int __init parse_tag_serialnr(const struct tag *tag)
633 {
634         system_serial_low = tag->u.serialnr.low;
635         system_serial_high = tag->u.serialnr.high;
636         return 0;
637 }
638
639 __tagtable(ATAG_SERIAL, parse_tag_serialnr);
640
641 static int __init parse_tag_revision(const struct tag *tag)
642 {
643         system_rev = tag->u.revision.rev;
644         return 0;
645 }
646
647 __tagtable(ATAG_REVISION, parse_tag_revision);
648
649 static int __init parse_tag_cmdline(const struct tag *tag)
650 {
651 #ifndef CONFIG_CMDLINE_FORCE
652         strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
653 #else
654         pr_warning("Ignoring tag cmdline (using the default kernel command line)\n");
655 #endif /* CONFIG_CMDLINE_FORCE */
656         return 0;
657 }
658
659 __tagtable(ATAG_CMDLINE, parse_tag_cmdline);
660
661 /*
662  * Scan the tag table for this tag, and call its parse function.
663  * The tag table is built by the linker from all the __tagtable
664  * declarations.
665  */
666 static int __init parse_tag(const struct tag *tag)
667 {
668         extern struct tagtable __tagtable_begin, __tagtable_end;
669         struct tagtable *t;
670
671         for (t = &__tagtable_begin; t < &__tagtable_end; t++)
672                 if (tag->hdr.tag == t->tag) {
673                         t->parse(tag);
674                         break;
675                 }
676
677         return t < &__tagtable_end;
678 }
679
680 /*
681  * Parse all tags in the list, checking both the global and architecture
682  * specific tag tables.
683  */
684 static void __init parse_tags(const struct tag *t)
685 {
686         for (; t->hdr.size; t = tag_next(t))
687                 if (!parse_tag(t))
688                         printk(KERN_WARNING
689                                 "Ignoring unrecognised tag 0x%08x\n",
690                                 t->hdr.tag);
691 }
692
693 /*
694  * This holds our defaults.
695  */
696 static struct init_tags {
697         struct tag_header hdr1;
698         struct tag_core   core;
699         struct tag_header hdr2;
700         struct tag_mem32  mem;
701         struct tag_header hdr3;
702 } init_tags __initdata = {
703         { tag_size(tag_core), ATAG_CORE },
704         { 1, PAGE_SIZE, 0xff },
705         { tag_size(tag_mem32), ATAG_MEM },
706         { MEM_SIZE, PHYS_OFFSET },
707         { 0, ATAG_NONE }
708 };
709
710 static int __init customize_machine(void)
711 {
712         /* customizes platform devices, or adds new ones */
713         if (machine_desc->init_machine)
714                 machine_desc->init_machine();
715         return 0;
716 }
717 arch_initcall(customize_machine);
718
719 #ifdef CONFIG_KEXEC
720 static inline unsigned long long get_total_mem(void)
721 {
722         unsigned long total;
723
724         total = max_low_pfn - min_low_pfn;
725         return total << PAGE_SHIFT;
726 }
727
728 /**
729  * reserve_crashkernel() - reserves memory are for crash kernel
730  *
731  * This function reserves memory area given in "crashkernel=" kernel command
732  * line parameter. The memory reserved is used by a dump capture kernel when
733  * primary kernel is crashing.
734  */
735 static void __init reserve_crashkernel(void)
736 {
737         unsigned long long crash_size, crash_base;
738         unsigned long long total_mem;
739         int ret;
740
741         total_mem = get_total_mem();
742         ret = parse_crashkernel(boot_command_line, total_mem,
743                                 &crash_size, &crash_base);
744         if (ret)
745                 return;
746
747         ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
748         if (ret < 0) {
749                 printk(KERN_WARNING "crashkernel reservation failed - "
750                        "memory is in use (0x%lx)\n", (unsigned long)crash_base);
751                 return;
752         }
753
754         printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
755                "for crashkernel (System RAM: %ldMB)\n",
756                (unsigned long)(crash_size >> 20),
757                (unsigned long)(crash_base >> 20),
758                (unsigned long)(total_mem >> 20));
759
760         crashk_res.start = crash_base;
761         crashk_res.end = crash_base + crash_size - 1;
762         insert_resource(&iomem_resource, &crashk_res);
763 }
764 #else
765 static inline void reserve_crashkernel(void) {}
766 #endif /* CONFIG_KEXEC */
767
768 /*
769  * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
770  * is_kdump_kernel() to determine if we are booting after a panic. Hence
771  * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
772  */
773
774 #ifdef CONFIG_CRASH_DUMP
775 /*
776  * elfcorehdr= specifies the location of elf core header stored by the crashed
777  * kernel. This option will be passed by kexec loader to the capture kernel.
778  */
779 static int __init setup_elfcorehdr(char *arg)
780 {
781         char *end;
782
783         if (!arg)
784                 return -EINVAL;
785
786         elfcorehdr_addr = memparse(arg, &end);
787         return end > arg ? 0 : -EINVAL;
788 }
789 early_param("elfcorehdr", setup_elfcorehdr);
790 #endif /* CONFIG_CRASH_DUMP */
791
792 static void __init squash_mem_tags(struct tag *tag)
793 {
794         for (; tag->hdr.size; tag = tag_next(tag))
795                 if (tag->hdr.tag == ATAG_MEM)
796                         tag->hdr.tag = ATAG_NONE;
797 }
798
799 void __init setup_arch(char **cmdline_p)
800 {
801         struct tag *tags = (struct tag *)&init_tags;
802         struct machine_desc *mdesc;
803         char *from = default_command_line;
804
805         unwind_init();
806
807         setup_processor();
808         mdesc = setup_machine(machine_arch_type);
809         machine_desc = mdesc;
810         machine_name = mdesc->name;
811
812         if (mdesc->soft_reboot)
813                 reboot_setup("s");
814
815         if (__atags_pointer)
816                 tags = phys_to_virt(__atags_pointer);
817         else if (mdesc->boot_params)
818                 tags = phys_to_virt(mdesc->boot_params);
819
820 #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
821         /*
822          * If we have the old style parameters, convert them to
823          * a tag list.
824          */
825         if (tags->hdr.tag != ATAG_CORE)
826                 convert_to_tag_list(tags);
827 #endif
828         if (tags->hdr.tag != ATAG_CORE)
829                 tags = (struct tag *)&init_tags;
830
831         if (mdesc->fixup)
832                 mdesc->fixup(mdesc, tags, &from, &meminfo);
833
834         if (tags->hdr.tag == ATAG_CORE) {
835                 if (meminfo.nr_banks != 0)
836                         squash_mem_tags(tags);
837                 save_atags(tags);
838                 parse_tags(tags);
839         }
840
841         init_mm.start_code = (unsigned long) _text;
842         init_mm.end_code   = (unsigned long) _etext;
843         init_mm.end_data   = (unsigned long) _edata;
844         init_mm.brk        = (unsigned long) _end;
845
846         /* parse_early_param needs a boot_command_line */
847         strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
848
849         /* populate cmd_line too for later use, preserving boot_command_line */
850         strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
851         *cmdline_p = cmd_line;
852
853         parse_early_param();
854
855         arm_memblock_init(&meminfo, mdesc);
856
857         paging_init(mdesc);
858         request_standard_resources(mdesc);
859
860 #ifdef CONFIG_SMP
861         if (is_smp())
862                 smp_init_cpus();
863 #endif
864         reserve_crashkernel();
865
866         cpu_init();
867         tcm_init();
868
869 #ifdef CONFIG_MULTI_IRQ_HANDLER
870         handle_arch_irq = mdesc->handle_irq;
871 #endif
872
873 #ifdef CONFIG_VT
874 #if defined(CONFIG_VGA_CONSOLE)
875         conswitchp = &vga_con;
876 #elif defined(CONFIG_DUMMY_CONSOLE)
877         conswitchp = &dummy_con;
878 #endif
879 #endif
880         early_trap_init();
881
882         if (mdesc->init_early)
883                 mdesc->init_early();
884 }
885
886
887 static int __init topology_init(void)
888 {
889         int cpu;
890
891         for_each_possible_cpu(cpu) {
892                 struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
893                 cpuinfo->cpu.hotpluggable = 1;
894                 register_cpu(&cpuinfo->cpu, cpu);
895         }
896
897         return 0;
898 }
899 subsys_initcall(topology_init);
900
901 #ifdef CONFIG_HAVE_PROC_CPU
902 static int __init proc_cpu_init(void)
903 {
904         struct proc_dir_entry *res;
905
906         res = proc_mkdir("cpu", NULL);
907         if (!res)
908                 return -ENOMEM;
909         return 0;
910 }
911 fs_initcall(proc_cpu_init);
912 #endif
913
914 static const char *hwcap_str[] = {
915         "swp",
916         "half",
917         "thumb",
918         "26bit",
919         "fastmult",
920         "fpa",
921         "vfp",
922         "edsp",
923         "java",
924         "iwmmxt",
925         "crunch",
926         "thumbee",
927         "neon",
928         "vfpv3",
929         "vfpv3d16",
930         NULL
931 };
932
933 static int c_show(struct seq_file *m, void *v)
934 {
935         int i;
936
937         seq_printf(m, "Processor\t: %s rev %d (%s)\n",
938                    cpu_name, read_cpuid_id() & 15, elf_platform);
939
940 #if defined(CONFIG_SMP)
941         for_each_online_cpu(i) {
942                 /*
943                  * glibc reads /proc/cpuinfo to determine the number of
944                  * online processors, looking for lines beginning with
945                  * "processor".  Give glibc what it expects.
946                  */
947                 seq_printf(m, "processor\t: %d\n", i);
948                 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
949                            per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
950                            (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
951         }
952 #else /* CONFIG_SMP */
953         seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
954                    loops_per_jiffy / (500000/HZ),
955                    (loops_per_jiffy / (5000/HZ)) % 100);
956 #endif
957
958         /* dump out the processor features */
959         seq_puts(m, "Features\t: ");
960
961         for (i = 0; hwcap_str[i]; i++)
962                 if (elf_hwcap & (1 << i))
963                         seq_printf(m, "%s ", hwcap_str[i]);
964
965         seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
966         seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
967
968         if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
969                 /* pre-ARM7 */
970                 seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
971         } else {
972                 if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
973                         /* ARM7 */
974                         seq_printf(m, "CPU variant\t: 0x%02x\n",
975                                    (read_cpuid_id() >> 16) & 127);
976                 } else {
977                         /* post-ARM7 */
978                         seq_printf(m, "CPU variant\t: 0x%x\n",
979                                    (read_cpuid_id() >> 20) & 15);
980                 }
981                 seq_printf(m, "CPU part\t: 0x%03x\n",
982                            (read_cpuid_id() >> 4) & 0xfff);
983         }
984         seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
985
986         seq_puts(m, "\n");
987
988         seq_printf(m, "Hardware\t: %s\n", machine_name);
989         seq_printf(m, "Revision\t: %04x\n", system_rev);
990         seq_printf(m, "Serial\t\t: %08x%08x\n",
991                    system_serial_high, system_serial_low);
992
993         return 0;
994 }
995
996 static void *c_start(struct seq_file *m, loff_t *pos)
997 {
998         return *pos < 1 ? (void *)1 : NULL;
999 }
1000
1001 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1002 {
1003         ++*pos;
1004         return NULL;
1005 }
1006
1007 static void c_stop(struct seq_file *m, void *v)
1008 {
1009 }
1010
1011 const struct seq_operations cpuinfo_op = {
1012         .start  = c_start,
1013         .next   = c_next,
1014         .stop   = c_stop,
1015         .show   = c_show
1016 };