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13#include <linux/init.h>
14#include <linux/ioport.h>
15#include <linux/export.h>
16#include <linux/screen_info.h>
17#include <linux/memblock.h>
18#include <linux/bootmem.h>
19#include <linux/initrd.h>
20#include <linux/root_dev.h>
21#include <linux/highmem.h>
22#include <linux/console.h>
23#include <linux/pfn.h>
24#include <linux/debugfs.h>
25#include <linux/kexec.h>
26#include <linux/sizes.h>
27#include <linux/device.h>
28#include <linux/dma-contiguous.h>
29#include <linux/decompress/generic.h>
30#include <linux/of_fdt.h>
31
32#include <asm/addrspace.h>
33#include <asm/bootinfo.h>
34#include <asm/bugs.h>
35#include <asm/cache.h>
36#include <asm/cdmm.h>
37#include <asm/cpu.h>
38#include <asm/debug.h>
39#include <asm/sections.h>
40#include <asm/setup.h>
41#include <asm/smp-ops.h>
42#include <asm/prom.h>
43
44#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
45const char __section(.appended_dtb) __appended_dtb[0x100000];
46#endif
47
48struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
49
50EXPORT_SYMBOL(cpu_data);
51
52#ifdef CONFIG_VT
53struct screen_info screen_info;
54#endif
55
56
57
58
59
60
61unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
62
63EXPORT_SYMBOL(mips_machtype);
64
65struct boot_mem_map boot_mem_map;
66
67static char __initdata command_line[COMMAND_LINE_SIZE];
68char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
69
70#ifdef CONFIG_CMDLINE_BOOL
71static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
72#endif
73
74
75
76
77
78const unsigned long mips_io_port_base = -1;
79EXPORT_SYMBOL(mips_io_port_base);
80
81static struct resource code_resource = { .name = "Kernel code", };
82static struct resource data_resource = { .name = "Kernel data", };
83static struct resource bss_resource = { .name = "Kernel bss", };
84
85static void *detect_magic __initdata = detect_memory_region;
86
87void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
88{
89 int x = boot_mem_map.nr_map;
90 int i;
91
92
93
94
95
96 if (start + size - 1 == (phys_addr_t)ULLONG_MAX)
97 --size;
98
99
100 if (start + size < start) {
101 pr_warn("Trying to add an invalid memory region, skipped\n");
102 return;
103 }
104
105
106
107
108 for (i = 0; i < boot_mem_map.nr_map; i++) {
109 struct boot_mem_map_entry *entry = boot_mem_map.map + i;
110 unsigned long top;
111
112 if (entry->type != type)
113 continue;
114
115 if (start + size < entry->addr)
116 continue;
117
118 if (entry->addr + entry->size < start)
119 continue;
120
121 top = max(entry->addr + entry->size, start + size);
122 entry->addr = min(entry->addr, start);
123 entry->size = top - entry->addr;
124
125 return;
126 }
127
128 if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) {
129 pr_err("Ooops! Too many entries in the memory map!\n");
130 return;
131 }
132
133 boot_mem_map.map[x].addr = start;
134 boot_mem_map.map[x].size = size;
135 boot_mem_map.map[x].type = type;
136 boot_mem_map.nr_map++;
137}
138
139void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
140{
141 void *dm = &detect_magic;
142 phys_addr_t size;
143
144 for (size = sz_min; size < sz_max; size <<= 1) {
145 if (!memcmp(dm, dm + size, sizeof(detect_magic)))
146 break;
147 }
148
149 pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
150 ((unsigned long long) size) / SZ_1M,
151 (unsigned long long) start,
152 ((unsigned long long) sz_min) / SZ_1M,
153 ((unsigned long long) sz_max) / SZ_1M);
154
155 add_memory_region(start, size, BOOT_MEM_RAM);
156}
157
158bool __init memory_region_available(phys_addr_t start, phys_addr_t size)
159{
160 int i;
161 bool in_ram = false, free = true;
162
163 for (i = 0; i < boot_mem_map.nr_map; i++) {
164 phys_addr_t start_, end_;
165
166 start_ = boot_mem_map.map[i].addr;
167 end_ = boot_mem_map.map[i].addr + boot_mem_map.map[i].size;
168
169 switch (boot_mem_map.map[i].type) {
170 case BOOT_MEM_RAM:
171 if (start >= start_ && start + size <= end_)
172 in_ram = true;
173 break;
174 case BOOT_MEM_RESERVED:
175 if ((start >= start_ && start < end_) ||
176 (start < start_ && start + size >= start_))
177 free = false;
178 break;
179 default:
180 continue;
181 }
182 }
183
184 return in_ram && free;
185}
186
187static void __init print_memory_map(void)
188{
189 int i;
190 const int field = 2 * sizeof(unsigned long);
191
192 for (i = 0; i < boot_mem_map.nr_map; i++) {
193 printk(KERN_INFO " memory: %0*Lx @ %0*Lx ",
194 field, (unsigned long long) boot_mem_map.map[i].size,
195 field, (unsigned long long) boot_mem_map.map[i].addr);
196
197 switch (boot_mem_map.map[i].type) {
198 case BOOT_MEM_RAM:
199 printk(KERN_CONT "(usable)\n");
200 break;
201 case BOOT_MEM_INIT_RAM:
202 printk(KERN_CONT "(usable after init)\n");
203 break;
204 case BOOT_MEM_ROM_DATA:
205 printk(KERN_CONT "(ROM data)\n");
206 break;
207 case BOOT_MEM_RESERVED:
208 printk(KERN_CONT "(reserved)\n");
209 break;
210 default:
211 printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type);
212 break;
213 }
214 }
215}
216
217
218
219
220#ifdef CONFIG_BLK_DEV_INITRD
221
222static int __init rd_start_early(char *p)
223{
224 unsigned long start = memparse(p, &p);
225
226#ifdef CONFIG_64BIT
227
228 if (start < XKPHYS)
229 start = (int)start;
230#endif
231 initrd_start = start;
232 initrd_end += start;
233 return 0;
234}
235early_param("rd_start", rd_start_early);
236
237static int __init rd_size_early(char *p)
238{
239 initrd_end += memparse(p, &p);
240 return 0;
241}
242early_param("rd_size", rd_size_early);
243
244
245static unsigned long __init init_initrd(void)
246{
247 unsigned long end;
248
249
250
251
252
253
254 if (!initrd_start || initrd_end <= initrd_start)
255 goto disable;
256
257 if (initrd_start & ~PAGE_MASK) {
258 pr_err("initrd start must be page aligned\n");
259 goto disable;
260 }
261 if (initrd_start < PAGE_OFFSET) {
262 pr_err("initrd start < PAGE_OFFSET\n");
263 goto disable;
264 }
265
266
267
268
269
270
271
272
273 end = __pa(initrd_end);
274 initrd_end = (unsigned long)__va(end);
275 initrd_start = (unsigned long)__va(__pa(initrd_start));
276
277 ROOT_DEV = Root_RAM0;
278 return PFN_UP(end);
279disable:
280 initrd_start = 0;
281 initrd_end = 0;
282 return 0;
283}
284
285
286
287
288static void __init maybe_bswap_initrd(void)
289{
290#if defined(CONFIG_CPU_CAVIUM_OCTEON)
291 u64 buf;
292
293
294 if (!memcmp((void *)initrd_start, "070701", 6))
295 return;
296
297
298 if (decompress_method((unsigned char *)initrd_start, 8, NULL))
299 return;
300
301
302 buf = swab64p((u64 *)initrd_start);
303 if (!memcmp(&buf, "070701", 6) ||
304 decompress_method((unsigned char *)(&buf), 8, NULL)) {
305 unsigned long i;
306
307 pr_info("Byteswapped initrd detected\n");
308 for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8)
309 swab64s((u64 *)i);
310 }
311#endif
312}
313
314static void __init finalize_initrd(void)
315{
316 unsigned long size = initrd_end - initrd_start;
317
318 if (size == 0) {
319 printk(KERN_INFO "Initrd not found or empty");
320 goto disable;
321 }
322 if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
323 printk(KERN_ERR "Initrd extends beyond end of memory");
324 goto disable;
325 }
326
327 maybe_bswap_initrd();
328
329 reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
330 initrd_below_start_ok = 1;
331
332 pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
333 initrd_start, size);
334 return;
335disable:
336 printk(KERN_CONT " - disabling initrd\n");
337 initrd_start = 0;
338 initrd_end = 0;
339}
340
341#else
342
343static unsigned long __init init_initrd(void)
344{
345 return 0;
346}
347
348#define finalize_initrd() do {} while (0)
349
350#endif
351
352
353
354
355
356#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA))
357
358static void __init bootmem_init(void)
359{
360 init_initrd();
361 finalize_initrd();
362}
363
364#else
365
366static unsigned long __init bootmap_bytes(unsigned long pages)
367{
368 unsigned long bytes = DIV_ROUND_UP(pages, 8);
369
370 return ALIGN(bytes, sizeof(long));
371}
372
373static void __init bootmem_init(void)
374{
375 unsigned long reserved_end;
376 unsigned long mapstart = ~0UL;
377 unsigned long bootmap_size;
378 phys_addr_t ramstart = (phys_addr_t)ULLONG_MAX;
379 bool bootmap_valid = false;
380 int i;
381
382
383
384
385
386
387
388 init_initrd();
389 reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
390
391
392
393
394
395 min_low_pfn = ~0UL;
396 max_low_pfn = 0;
397
398
399
400
401
402 for (i = 0; i < boot_mem_map.nr_map; i++) {
403 unsigned long start, end;
404
405 if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
406 continue;
407
408 start = PFN_UP(boot_mem_map.map[i].addr);
409 end = PFN_DOWN(boot_mem_map.map[i].addr
410 + boot_mem_map.map[i].size);
411
412 ramstart = min(ramstart, boot_mem_map.map[i].addr);
413
414#ifndef CONFIG_HIGHMEM
415
416
417
418
419
420
421 if (start >= PFN_DOWN(HIGHMEM_START))
422 continue;
423 if (end > PFN_DOWN(HIGHMEM_START))
424 end = PFN_DOWN(HIGHMEM_START);
425#endif
426
427 if (end > max_low_pfn)
428 max_low_pfn = end;
429 if (start < min_low_pfn)
430 min_low_pfn = start;
431 if (end <= reserved_end)
432 continue;
433#ifdef CONFIG_BLK_DEV_INITRD
434
435 if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end)))
436 continue;
437#endif
438 if (start >= mapstart)
439 continue;
440 mapstart = max(reserved_end, start);
441 }
442
443
444
445
446 if (ramstart > PHYS_OFFSET)
447 add_memory_region(PHYS_OFFSET, ramstart - PHYS_OFFSET,
448 BOOT_MEM_RESERVED);
449
450 if (min_low_pfn >= max_low_pfn)
451 panic("Incorrect memory mapping !!!");
452 if (min_low_pfn > ARCH_PFN_OFFSET) {
453 pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
454 (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
455 min_low_pfn - ARCH_PFN_OFFSET);
456 } else if (min_low_pfn < ARCH_PFN_OFFSET) {
457 pr_info("%lu free pages won't be used\n",
458 ARCH_PFN_OFFSET - min_low_pfn);
459 }
460 min_low_pfn = ARCH_PFN_OFFSET;
461
462
463
464
465 max_pfn = max_low_pfn;
466 if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
467#ifdef CONFIG_HIGHMEM
468 highstart_pfn = PFN_DOWN(HIGHMEM_START);
469 highend_pfn = max_low_pfn;
470#endif
471 max_low_pfn = PFN_DOWN(HIGHMEM_START);
472 }
473
474#ifdef CONFIG_BLK_DEV_INITRD
475
476
477
478 if (initrd_end)
479 mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end)));
480#endif
481
482
483
484
485
486 bootmap_size = bootmap_bytes(max_low_pfn - min_low_pfn);
487
488 bootmap_valid = memory_region_available(PFN_PHYS(mapstart),
489 bootmap_size);
490 for (i = 0; i < boot_mem_map.nr_map && !bootmap_valid; i++) {
491 unsigned long mapstart_addr;
492
493 switch (boot_mem_map.map[i].type) {
494 case BOOT_MEM_RESERVED:
495 mapstart_addr = PFN_ALIGN(boot_mem_map.map[i].addr +
496 boot_mem_map.map[i].size);
497 if (PHYS_PFN(mapstart_addr) < mapstart)
498 break;
499
500 bootmap_valid = memory_region_available(mapstart_addr,
501 bootmap_size);
502 if (bootmap_valid)
503 mapstart = PHYS_PFN(mapstart_addr);
504 break;
505 default:
506 break;
507 }
508 }
509
510 if (!bootmap_valid)
511 panic("No memory area to place a bootmap bitmap");
512
513
514
515
516 if (bootmap_size != init_bootmem_node(NODE_DATA(0), mapstart,
517 min_low_pfn, max_low_pfn))
518 panic("Unexpected memory size required for bootmap");
519
520 for (i = 0; i < boot_mem_map.nr_map; i++) {
521 unsigned long start, end;
522
523 start = PFN_UP(boot_mem_map.map[i].addr);
524 end = PFN_DOWN(boot_mem_map.map[i].addr
525 + boot_mem_map.map[i].size);
526
527 if (start <= min_low_pfn)
528 start = min_low_pfn;
529 if (start >= end)
530 continue;
531
532#ifndef CONFIG_HIGHMEM
533 if (end > max_low_pfn)
534 end = max_low_pfn;
535
536
537
538
539 if (end <= start)
540 continue;
541#endif
542
543 memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0);
544 }
545
546
547
548
549 for (i = 0; i < boot_mem_map.nr_map; i++) {
550 unsigned long start, end, size;
551
552 start = PFN_UP(boot_mem_map.map[i].addr);
553 end = PFN_DOWN(boot_mem_map.map[i].addr
554 + boot_mem_map.map[i].size);
555
556
557
558
559 switch (boot_mem_map.map[i].type) {
560 case BOOT_MEM_RAM:
561 break;
562 case BOOT_MEM_INIT_RAM:
563 memory_present(0, start, end);
564 continue;
565 default:
566
567 if (start > min_low_pfn && end < max_low_pfn)
568 reserve_bootmem(boot_mem_map.map[i].addr,
569 boot_mem_map.map[i].size,
570 BOOTMEM_DEFAULT);
571 continue;
572 }
573
574
575
576
577
578 if (start >= max_low_pfn)
579 continue;
580 if (start < reserved_end)
581 start = reserved_end;
582 if (end > max_low_pfn)
583 end = max_low_pfn;
584
585
586
587
588 if (end <= start)
589 continue;
590 size = end - start;
591
592
593 free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
594 memory_present(0, start, end);
595 }
596
597
598
599
600 reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
601
602#ifdef CONFIG_RELOCATABLE
603
604
605
606
607
608 if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) {
609 unsigned long offset;
610 extern void show_kernel_relocation(const char *level);
611
612 offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS);
613 free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset);
614
615#if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO)
616
617
618
619
620 show_kernel_relocation(KERN_INFO);
621#endif
622 }
623#endif
624
625
626
627
628 finalize_initrd();
629}
630
631#endif
632
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654
655
656static int usermem __initdata;
657
658static int __init early_parse_mem(char *p)
659{
660 phys_addr_t start, size;
661
662
663
664
665
666
667 if (usermem == 0) {
668 boot_mem_map.nr_map = 0;
669 usermem = 1;
670 }
671 start = 0;
672 size = memparse(p, &p);
673 if (*p == '@')
674 start = memparse(p + 1, &p);
675
676 add_memory_region(start, size, BOOT_MEM_RAM);
677
678 return 0;
679}
680early_param("mem", early_parse_mem);
681
682static int __init early_parse_memmap(char *p)
683{
684 char *oldp;
685 u64 start_at, mem_size;
686
687 if (!p)
688 return -EINVAL;
689
690 if (!strncmp(p, "exactmap", 8)) {
691 pr_err("\"memmap=exactmap\" invalid on MIPS\n");
692 return 0;
693 }
694
695 oldp = p;
696 mem_size = memparse(p, &p);
697 if (p == oldp)
698 return -EINVAL;
699
700 if (*p == '@') {
701 start_at = memparse(p+1, &p);
702 add_memory_region(start_at, mem_size, BOOT_MEM_RAM);
703 } else if (*p == '#') {
704 pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n");
705 return -EINVAL;
706 } else if (*p == '$') {
707 start_at = memparse(p+1, &p);
708 add_memory_region(start_at, mem_size, BOOT_MEM_RESERVED);
709 } else {
710 pr_err("\"memmap\" invalid format!\n");
711 return -EINVAL;
712 }
713
714 if (*p == '\0') {
715 usermem = 1;
716 return 0;
717 } else
718 return -EINVAL;
719}
720early_param("memmap", early_parse_memmap);
721
722#ifdef CONFIG_PROC_VMCORE
723unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
724static int __init early_parse_elfcorehdr(char *p)
725{
726 int i;
727
728 setup_elfcorehdr = memparse(p, &p);
729
730 for (i = 0; i < boot_mem_map.nr_map; i++) {
731 unsigned long start = boot_mem_map.map[i].addr;
732 unsigned long end = (boot_mem_map.map[i].addr +
733 boot_mem_map.map[i].size);
734 if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
735
736
737
738
739
740 setup_elfcorehdr_size = end - setup_elfcorehdr;
741 break;
742 }
743 }
744
745
746
747
748 return 0;
749}
750early_param("elfcorehdr", early_parse_elfcorehdr);
751#endif
752
753static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type)
754{
755 phys_addr_t size;
756 int i;
757
758 size = end - mem;
759 if (!size)
760 return;
761
762
763 for (i = 0; i < boot_mem_map.nr_map; i++) {
764 if (mem >= boot_mem_map.map[i].addr &&
765 mem < (boot_mem_map.map[i].addr +
766 boot_mem_map.map[i].size))
767 return;
768 }
769 add_memory_region(mem, size, type);
770}
771
772#ifdef CONFIG_KEXEC
773static inline unsigned long long get_total_mem(void)
774{
775 unsigned long long total;
776
777 total = max_pfn - min_low_pfn;
778 return total << PAGE_SHIFT;
779}
780
781static void __init mips_parse_crashkernel(void)
782{
783 unsigned long long total_mem;
784 unsigned long long crash_size, crash_base;
785 int ret;
786
787 total_mem = get_total_mem();
788 ret = parse_crashkernel(boot_command_line, total_mem,
789 &crash_size, &crash_base);
790 if (ret != 0 || crash_size <= 0)
791 return;
792
793 if (!memory_region_available(crash_base, crash_size)) {
794 pr_warn("Invalid memory region reserved for crash kernel\n");
795 return;
796 }
797
798 crashk_res.start = crash_base;
799 crashk_res.end = crash_base + crash_size - 1;
800}
801
802static void __init request_crashkernel(struct resource *res)
803{
804 int ret;
805
806 if (crashk_res.start == crashk_res.end)
807 return;
808
809 ret = request_resource(res, &crashk_res);
810 if (!ret)
811 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
812 (unsigned long)((crashk_res.end -
813 crashk_res.start + 1) >> 20),
814 (unsigned long)(crashk_res.start >> 20));
815}
816#else
817static void __init mips_parse_crashkernel(void)
818{
819}
820
821static void __init request_crashkernel(struct resource *res)
822{
823}
824#endif
825
826#define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER)
827#define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB)
828#define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)
829#define BUILTIN_EXTEND_WITH_PROM \
830 IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)
831
832static void __init arch_mem_init(char **cmdline_p)
833{
834 struct memblock_region *reg;
835 extern void plat_mem_setup(void);
836
837#if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
838 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
839#else
840 if ((USE_PROM_CMDLINE && arcs_cmdline[0]) ||
841 (USE_DTB_CMDLINE && !boot_command_line[0]))
842 strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
843
844 if (EXTEND_WITH_PROM && arcs_cmdline[0]) {
845 if (boot_command_line[0])
846 strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
847 strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
848 }
849
850#if defined(CONFIG_CMDLINE_BOOL)
851 if (builtin_cmdline[0]) {
852 if (boot_command_line[0])
853 strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
854 strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
855 }
856
857 if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) {
858 if (boot_command_line[0])
859 strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
860 strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
861 }
862#endif
863#endif
864
865
866 plat_mem_setup();
867
868
869
870
871
872
873
874 arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
875 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
876 BOOT_MEM_RAM);
877 arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
878 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
879 BOOT_MEM_INIT_RAM);
880
881 pr_info("Determined physical RAM map:\n");
882 print_memory_map();
883
884 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
885
886 *cmdline_p = command_line;
887
888 parse_early_param();
889
890 if (usermem) {
891 pr_info("User-defined physical RAM map:\n");
892 print_memory_map();
893 }
894
895 early_init_fdt_reserve_self();
896 early_init_fdt_scan_reserved_mem();
897
898 bootmem_init();
899#ifdef CONFIG_PROC_VMCORE
900 if (setup_elfcorehdr && setup_elfcorehdr_size) {
901 printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
902 setup_elfcorehdr, setup_elfcorehdr_size);
903 reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
904 BOOTMEM_DEFAULT);
905 }
906#endif
907
908 mips_parse_crashkernel();
909#ifdef CONFIG_KEXEC
910 if (crashk_res.start != crashk_res.end)
911 reserve_bootmem(crashk_res.start,
912 crashk_res.end - crashk_res.start + 1,
913 BOOTMEM_DEFAULT);
914#endif
915 device_tree_init();
916 sparse_init();
917 plat_swiotlb_setup();
918
919 dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
920
921 for_each_memblock(reserved, reg)
922 if (reg->size != 0)
923 reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
924
925 reserve_bootmem_region(__pa_symbol(&__nosave_begin),
926 __pa_symbol(&__nosave_end));
927}
928
929static void __init resource_init(void)
930{
931 int i;
932
933 if (UNCAC_BASE != IO_BASE)
934 return;
935
936 code_resource.start = __pa_symbol(&_text);
937 code_resource.end = __pa_symbol(&_etext) - 1;
938 data_resource.start = __pa_symbol(&_etext);
939 data_resource.end = __pa_symbol(&_edata) - 1;
940 bss_resource.start = __pa_symbol(&__bss_start);
941 bss_resource.end = __pa_symbol(&__bss_stop) - 1;
942
943 for (i = 0; i < boot_mem_map.nr_map; i++) {
944 struct resource *res;
945 unsigned long start, end;
946
947 start = boot_mem_map.map[i].addr;
948 end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
949 if (start >= HIGHMEM_START)
950 continue;
951 if (end >= HIGHMEM_START)
952 end = HIGHMEM_START - 1;
953
954 res = alloc_bootmem(sizeof(struct resource));
955
956 res->start = start;
957 res->end = end;
958 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
959
960 switch (boot_mem_map.map[i].type) {
961 case BOOT_MEM_RAM:
962 case BOOT_MEM_INIT_RAM:
963 case BOOT_MEM_ROM_DATA:
964 res->name = "System RAM";
965 res->flags |= IORESOURCE_SYSRAM;
966 break;
967 case BOOT_MEM_RESERVED:
968 default:
969 res->name = "reserved";
970 }
971
972 request_resource(&iomem_resource, res);
973
974
975
976
977
978
979 request_resource(res, &code_resource);
980 request_resource(res, &data_resource);
981 request_resource(res, &bss_resource);
982 request_crashkernel(res);
983 }
984}
985
986#ifdef CONFIG_SMP
987static void __init prefill_possible_map(void)
988{
989 int i, possible = num_possible_cpus();
990
991 if (possible > nr_cpu_ids)
992 possible = nr_cpu_ids;
993
994 for (i = 0; i < possible; i++)
995 set_cpu_possible(i, true);
996 for (; i < NR_CPUS; i++)
997 set_cpu_possible(i, false);
998
999 nr_cpu_ids = possible;
1000}
1001#else
1002static inline void prefill_possible_map(void) {}
1003#endif
1004
1005void __init setup_arch(char **cmdline_p)
1006{
1007 cpu_probe();
1008 mips_cm_probe();
1009 prom_init();
1010
1011 setup_early_fdc_console();
1012#ifdef CONFIG_EARLY_PRINTK
1013 setup_early_printk();
1014#endif
1015 cpu_report();
1016 check_bugs_early();
1017
1018#if defined(CONFIG_VT)
1019#if defined(CONFIG_VGA_CONSOLE)
1020 conswitchp = &vga_con;
1021#elif defined(CONFIG_DUMMY_CONSOLE)
1022 conswitchp = &dummy_con;
1023#endif
1024#endif
1025
1026 arch_mem_init(cmdline_p);
1027
1028 resource_init();
1029 plat_smp_setup();
1030 prefill_possible_map();
1031
1032 cpu_cache_init();
1033 paging_init();
1034}
1035
1036unsigned long kernelsp[NR_CPUS];
1037unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
1038
1039#ifdef CONFIG_USE_OF
1040unsigned long fw_passed_dtb;
1041#endif
1042
1043#ifdef CONFIG_DEBUG_FS
1044struct dentry *mips_debugfs_dir;
1045static int __init debugfs_mips(void)
1046{
1047 struct dentry *d;
1048
1049 d = debugfs_create_dir("mips", NULL);
1050 if (!d)
1051 return -ENOMEM;
1052 mips_debugfs_dir = d;
1053 return 0;
1054}
1055arch_initcall(debugfs_mips);
1056#endif
1057