2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1995 Linus Torvalds
7 * Copyright (C) 1995 Waldorf Electronics
8 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle
9 * Copyright (C) 1996 Stoned Elipot
10 * Copyright (C) 1999 Silicon Graphics, Inc.
11 * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki
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>
31 #include <asm/addrspace.h>
32 #include <asm/bootinfo.h>
34 #include <asm/cache.h>
37 #include <asm/debug.h>
38 #include <asm/sections.h>
39 #include <asm/setup.h>
40 #include <asm/smp-ops.h>
43 #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
44 const char __section(.appended_dtb
) __appended_dtb
[0x100000];
45 #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
47 struct cpuinfo_mips cpu_data
[NR_CPUS
] __read_mostly
;
49 EXPORT_SYMBOL(cpu_data
);
52 struct screen_info screen_info
;
58 * These are initialized so they are in the .data section
60 unsigned long mips_machtype __read_mostly
= MACH_UNKNOWN
;
62 EXPORT_SYMBOL(mips_machtype
);
64 struct boot_mem_map boot_mem_map
;
66 static char __initdata command_line
[COMMAND_LINE_SIZE
];
67 char __initdata arcs_cmdline
[COMMAND_LINE_SIZE
];
69 #ifdef CONFIG_CMDLINE_BOOL
70 static char __initdata builtin_cmdline
[COMMAND_LINE_SIZE
] = CONFIG_CMDLINE
;
74 * mips_io_port_base is the begin of the address space to which x86 style
75 * I/O ports are mapped.
77 const unsigned long mips_io_port_base
= -1;
78 EXPORT_SYMBOL(mips_io_port_base
);
80 static struct resource code_resource
= { .name
= "Kernel code", };
81 static struct resource data_resource
= { .name
= "Kernel data", };
83 static void *detect_magic __initdata
= detect_memory_region
;
85 void __init
add_memory_region(phys_addr_t start
, phys_addr_t size
, long type
)
87 int x
= boot_mem_map
.nr_map
;
91 * If the region reaches the top of the physical address space, adjust
92 * the size slightly so that (start + size) doesn't overflow
94 if (start
+ size
- 1 == (phys_addr_t
)ULLONG_MAX
)
98 if (start
+ size
< start
) {
99 pr_warn("Trying to add an invalid memory region, skipped\n");
104 * Try to merge with existing entry, if any.
106 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
107 struct boot_mem_map_entry
*entry
= boot_mem_map
.map
+ i
;
110 if (entry
->type
!= type
)
113 if (start
+ size
< entry
->addr
)
114 continue; /* no overlap */
116 if (entry
->addr
+ entry
->size
< start
)
117 continue; /* no overlap */
119 top
= max(entry
->addr
+ entry
->size
, start
+ size
);
120 entry
->addr
= min(entry
->addr
, start
);
121 entry
->size
= top
- entry
->addr
;
126 if (boot_mem_map
.nr_map
== BOOT_MEM_MAP_MAX
) {
127 pr_err("Ooops! Too many entries in the memory map!\n");
131 boot_mem_map
.map
[x
].addr
= start
;
132 boot_mem_map
.map
[x
].size
= size
;
133 boot_mem_map
.map
[x
].type
= type
;
134 boot_mem_map
.nr_map
++;
137 void __init
detect_memory_region(phys_addr_t start
, phys_addr_t sz_min
, phys_addr_t sz_max
)
139 void *dm
= &detect_magic
;
142 for (size
= sz_min
; size
< sz_max
; size
<<= 1) {
143 if (!memcmp(dm
, dm
+ size
, sizeof(detect_magic
)))
147 pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
148 ((unsigned long long) size
) / SZ_1M
,
149 (unsigned long long) start
,
150 ((unsigned long long) sz_min
) / SZ_1M
,
151 ((unsigned long long) sz_max
) / SZ_1M
);
153 add_memory_region(start
, size
, BOOT_MEM_RAM
);
156 static void __init
print_memory_map(void)
159 const int field
= 2 * sizeof(unsigned long);
161 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
162 printk(KERN_INFO
" memory: %0*Lx @ %0*Lx ",
163 field
, (unsigned long long) boot_mem_map
.map
[i
].size
,
164 field
, (unsigned long long) boot_mem_map
.map
[i
].addr
);
166 switch (boot_mem_map
.map
[i
].type
) {
168 printk(KERN_CONT
"(usable)\n");
170 case BOOT_MEM_INIT_RAM
:
171 printk(KERN_CONT
"(usable after init)\n");
173 case BOOT_MEM_ROM_DATA
:
174 printk(KERN_CONT
"(ROM data)\n");
176 case BOOT_MEM_RESERVED
:
177 printk(KERN_CONT
"(reserved)\n");
180 printk(KERN_CONT
"type %lu\n", boot_mem_map
.map
[i
].type
);
189 #ifdef CONFIG_BLK_DEV_INITRD
191 static int __init
rd_start_early(char *p
)
193 unsigned long start
= memparse(p
, &p
);
196 /* Guess if the sign extension was forgotten by bootloader */
200 initrd_start
= start
;
204 early_param("rd_start", rd_start_early
);
206 static int __init
rd_size_early(char *p
)
208 initrd_end
+= memparse(p
, &p
);
211 early_param("rd_size", rd_size_early
);
213 /* it returns the next free pfn after initrd */
214 static unsigned long __init
init_initrd(void)
219 * Board specific code or command line parser should have
220 * already set up initrd_start and initrd_end. In these cases
221 * perfom sanity checks and use them if all looks good.
223 if (!initrd_start
|| initrd_end
<= initrd_start
)
226 if (initrd_start
& ~PAGE_MASK
) {
227 pr_err("initrd start must be page aligned\n");
230 if (initrd_start
< PAGE_OFFSET
) {
231 pr_err("initrd start < PAGE_OFFSET\n");
236 * Sanitize initrd addresses. For example firmware
237 * can't guess if they need to pass them through
238 * 64-bits values if the kernel has been built in pure
239 * 32-bit. We need also to switch from KSEG0 to XKPHYS
240 * addresses now, so the code can now safely use __pa().
242 end
= __pa(initrd_end
);
243 initrd_end
= (unsigned long)__va(end
);
244 initrd_start
= (unsigned long)__va(__pa(initrd_start
));
246 ROOT_DEV
= Root_RAM0
;
254 /* In some conditions (e.g. big endian bootloader with a little endian
255 kernel), the initrd might appear byte swapped. Try to detect this and
256 byte swap it if needed. */
257 static void __init
maybe_bswap_initrd(void)
259 #if defined(CONFIG_CPU_CAVIUM_OCTEON)
262 /* Check for CPIO signature */
263 if (!memcmp((void *)initrd_start
, "070701", 6))
266 /* Check for compressed initrd */
267 if (decompress_method((unsigned char *)initrd_start
, 8, NULL
))
270 /* Try again with a byte swapped header */
271 buf
= swab64p((u64
*)initrd_start
);
272 if (!memcmp(&buf
, "070701", 6) ||
273 decompress_method((unsigned char *)(&buf
), 8, NULL
)) {
276 pr_info("Byteswapped initrd detected\n");
277 for (i
= initrd_start
; i
< ALIGN(initrd_end
, 8); i
+= 8)
283 static void __init
finalize_initrd(void)
285 unsigned long size
= initrd_end
- initrd_start
;
288 printk(KERN_INFO
"Initrd not found or empty");
291 if (__pa(initrd_end
) > PFN_PHYS(max_low_pfn
)) {
292 printk(KERN_ERR
"Initrd extends beyond end of memory");
296 maybe_bswap_initrd();
298 reserve_bootmem(__pa(initrd_start
), size
, BOOTMEM_DEFAULT
);
299 initrd_below_start_ok
= 1;
301 pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
305 printk(KERN_CONT
" - disabling initrd\n");
310 #else /* !CONFIG_BLK_DEV_INITRD */
312 static unsigned long __init
init_initrd(void)
317 #define finalize_initrd() do {} while (0)
322 * Initialize the bootmem allocator. It also setup initrd related data
325 #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA))
327 static void __init
bootmem_init(void)
333 #else /* !CONFIG_SGI_IP27 */
335 static void __init
bootmem_init(void)
337 unsigned long reserved_end
;
338 unsigned long mapstart
= ~0UL;
339 unsigned long bootmap_size
;
343 * Sanity check any INITRD first. We don't take it into account
344 * for bootmem setup initially, rely on the end-of-kernel-code
345 * as our memory range starting point. Once bootmem is inited we
346 * will reserve the area used for the initrd.
349 reserved_end
= (unsigned long) PFN_UP(__pa_symbol(&_end
));
352 * max_low_pfn is not a number of pages. The number of pages
353 * of the system is given by 'max_low_pfn - min_low_pfn'.
359 * Find the highest page frame number we have available.
361 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
362 unsigned long start
, end
;
364 if (boot_mem_map
.map
[i
].type
!= BOOT_MEM_RAM
)
367 start
= PFN_UP(boot_mem_map
.map
[i
].addr
);
368 end
= PFN_DOWN(boot_mem_map
.map
[i
].addr
369 + boot_mem_map
.map
[i
].size
);
371 if (end
> max_low_pfn
)
373 if (start
< min_low_pfn
)
375 if (end
<= reserved_end
)
377 #ifdef CONFIG_BLK_DEV_INITRD
378 /* Skip zones before initrd and initrd itself */
379 if (initrd_end
&& end
<= (unsigned long)PFN_UP(__pa(initrd_end
)))
382 if (start
>= mapstart
)
384 mapstart
= max(reserved_end
, start
);
387 if (min_low_pfn
>= max_low_pfn
)
388 panic("Incorrect memory mapping !!!");
389 if (min_low_pfn
> ARCH_PFN_OFFSET
) {
390 pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
391 (min_low_pfn
- ARCH_PFN_OFFSET
) * sizeof(struct page
),
392 min_low_pfn
- ARCH_PFN_OFFSET
);
393 } else if (min_low_pfn
< ARCH_PFN_OFFSET
) {
394 pr_info("%lu free pages won't be used\n",
395 ARCH_PFN_OFFSET
- min_low_pfn
);
397 min_low_pfn
= ARCH_PFN_OFFSET
;
400 * Determine low and high memory ranges
402 max_pfn
= max_low_pfn
;
403 if (max_low_pfn
> PFN_DOWN(HIGHMEM_START
)) {
404 #ifdef CONFIG_HIGHMEM
405 highstart_pfn
= PFN_DOWN(HIGHMEM_START
);
406 highend_pfn
= max_low_pfn
;
408 max_low_pfn
= PFN_DOWN(HIGHMEM_START
);
411 #ifdef CONFIG_BLK_DEV_INITRD
413 * mapstart should be after initrd_end
416 mapstart
= max(mapstart
, (unsigned long)PFN_UP(__pa(initrd_end
)));
420 * Initialize the boot-time allocator with low memory only.
422 bootmap_size
= init_bootmem_node(NODE_DATA(0), mapstart
,
423 min_low_pfn
, max_low_pfn
);
426 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
427 unsigned long start
, end
;
429 start
= PFN_UP(boot_mem_map
.map
[i
].addr
);
430 end
= PFN_DOWN(boot_mem_map
.map
[i
].addr
431 + boot_mem_map
.map
[i
].size
);
433 if (start
<= min_low_pfn
)
438 #ifndef CONFIG_HIGHMEM
439 if (end
> max_low_pfn
)
443 * ... finally, is the area going away?
449 memblock_add_node(PFN_PHYS(start
), PFN_PHYS(end
- start
), 0);
453 * Register fully available low RAM pages with the bootmem allocator.
455 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
456 unsigned long start
, end
, size
;
458 start
= PFN_UP(boot_mem_map
.map
[i
].addr
);
459 end
= PFN_DOWN(boot_mem_map
.map
[i
].addr
460 + boot_mem_map
.map
[i
].size
);
463 * Reserve usable memory.
465 switch (boot_mem_map
.map
[i
].type
) {
468 case BOOT_MEM_INIT_RAM
:
469 memory_present(0, start
, end
);
472 /* Not usable memory */
477 * We are rounding up the start address of usable memory
478 * and at the end of the usable range downwards.
480 if (start
>= max_low_pfn
)
482 if (start
< reserved_end
)
483 start
= reserved_end
;
484 if (end
> max_low_pfn
)
488 * ... finally, is the area going away?
494 /* Register lowmem ranges */
495 free_bootmem(PFN_PHYS(start
), size
<< PAGE_SHIFT
);
496 memory_present(0, start
, end
);
500 * Reserve the bootmap memory.
502 reserve_bootmem(PFN_PHYS(mapstart
), bootmap_size
, BOOTMEM_DEFAULT
);
504 #ifdef CONFIG_RELOCATABLE
506 * The kernel reserves all memory below its _end symbol as bootmem,
507 * but the kernel may now be at a much higher address. The memory
508 * between the original and new locations may be returned to the system.
510 if (__pa_symbol(_text
) > __pa_symbol(VMLINUX_LOAD_ADDRESS
)) {
511 unsigned long offset
;
512 extern void show_kernel_relocation(const char *level
);
514 offset
= __pa_symbol(_text
) - __pa_symbol(VMLINUX_LOAD_ADDRESS
);
515 free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS
), offset
);
517 #if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO)
519 * This information is necessary when debugging the kernel
520 * But is a security vulnerability otherwise!
522 show_kernel_relocation(KERN_INFO
);
528 * Reserve initrd memory if needed.
533 #endif /* CONFIG_SGI_IP27 */
536 * arch_mem_init - initialize memory management subsystem
538 * o plat_mem_setup() detects the memory configuration and will record detected
539 * memory areas using add_memory_region.
541 * At this stage the memory configuration of the system is known to the
542 * kernel but generic memory management system is still entirely uninitialized.
547 * o dma_contiguous_reserve()
549 * At this stage the bootmem allocator is ready to use.
551 * NOTE: historically plat_mem_setup did the entire platform initialization.
552 * This was rather impractical because it meant plat_mem_setup had to
553 * get away without any kind of memory allocator. To keep old code from
554 * breaking plat_setup was just renamed to plat_mem_setup and a second platform
555 * initialization hook for anything else was introduced.
558 static int usermem __initdata
;
560 static int __init
early_parse_mem(char *p
)
562 phys_addr_t start
, size
;
565 * If a user specifies memory size, we
566 * blow away any automatically generated
570 boot_mem_map
.nr_map
= 0;
574 size
= memparse(p
, &p
);
576 start
= memparse(p
+ 1, &p
);
578 add_memory_region(start
, size
, BOOT_MEM_RAM
);
581 early_param("mem", early_parse_mem
);
583 #ifdef CONFIG_PROC_VMCORE
584 unsigned long setup_elfcorehdr
, setup_elfcorehdr_size
;
585 static int __init
early_parse_elfcorehdr(char *p
)
589 setup_elfcorehdr
= memparse(p
, &p
);
591 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
592 unsigned long start
= boot_mem_map
.map
[i
].addr
;
593 unsigned long end
= (boot_mem_map
.map
[i
].addr
+
594 boot_mem_map
.map
[i
].size
);
595 if (setup_elfcorehdr
>= start
&& setup_elfcorehdr
< end
) {
597 * Reserve from the elf core header to the end of
598 * the memory segment, that should all be kdump
601 setup_elfcorehdr_size
= end
- setup_elfcorehdr
;
606 * If we don't find it in the memory map, then we shouldn't
607 * have to worry about it, as the new kernel won't use it.
611 early_param("elfcorehdr", early_parse_elfcorehdr
);
614 static void __init
arch_mem_addpart(phys_addr_t mem
, phys_addr_t end
, int type
)
623 /* Make sure it is in the boot_mem_map */
624 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
625 if (mem
>= boot_mem_map
.map
[i
].addr
&&
626 mem
< (boot_mem_map
.map
[i
].addr
+
627 boot_mem_map
.map
[i
].size
))
630 add_memory_region(mem
, size
, type
);
634 static inline unsigned long long get_total_mem(void)
636 unsigned long long total
;
638 total
= max_pfn
- min_low_pfn
;
639 return total
<< PAGE_SHIFT
;
642 static void __init
mips_parse_crashkernel(void)
644 unsigned long long total_mem
;
645 unsigned long long crash_size
, crash_base
;
648 total_mem
= get_total_mem();
649 ret
= parse_crashkernel(boot_command_line
, total_mem
,
650 &crash_size
, &crash_base
);
651 if (ret
!= 0 || crash_size
<= 0)
654 crashk_res
.start
= crash_base
;
655 crashk_res
.end
= crash_base
+ crash_size
- 1;
658 static void __init
request_crashkernel(struct resource
*res
)
662 ret
= request_resource(res
, &crashk_res
);
664 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
665 (unsigned long)((crashk_res
.end
-
666 crashk_res
.start
+ 1) >> 20),
667 (unsigned long)(crashk_res
.start
>> 20));
669 #else /* !defined(CONFIG_KEXEC) */
670 static void __init
mips_parse_crashkernel(void)
674 static void __init
request_crashkernel(struct resource
*res
)
677 #endif /* !defined(CONFIG_KEXEC) */
679 #define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER)
680 #define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB)
681 #define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)
682 #define BUILTIN_EXTEND_WITH_PROM \
683 IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)
685 static void __init
arch_mem_init(char **cmdline_p
)
687 struct memblock_region
*reg
;
688 extern void plat_mem_setup(void);
690 /* call board setup routine */
694 * Make sure all kernel memory is in the maps. The "UP" and
695 * "DOWN" are opposite for initdata since if it crosses over
696 * into another memory section you don't want that to be
697 * freed when the initdata is freed.
699 arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text
)) << PAGE_SHIFT
,
700 PFN_UP(__pa_symbol(&_edata
)) << PAGE_SHIFT
,
702 arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin
)) << PAGE_SHIFT
,
703 PFN_DOWN(__pa_symbol(&__init_end
)) << PAGE_SHIFT
,
706 pr_info("Determined physical RAM map:\n");
709 #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
710 strlcpy(boot_command_line
, builtin_cmdline
, COMMAND_LINE_SIZE
);
712 if ((USE_PROM_CMDLINE
&& arcs_cmdline
[0]) ||
713 (USE_DTB_CMDLINE
&& !boot_command_line
[0]))
714 strlcpy(boot_command_line
, arcs_cmdline
, COMMAND_LINE_SIZE
);
716 if (EXTEND_WITH_PROM
&& arcs_cmdline
[0]) {
717 if (boot_command_line
[0])
718 strlcat(boot_command_line
, " ", COMMAND_LINE_SIZE
);
719 strlcat(boot_command_line
, arcs_cmdline
, COMMAND_LINE_SIZE
);
722 #if defined(CONFIG_CMDLINE_BOOL)
723 if (builtin_cmdline
[0]) {
724 if (boot_command_line
[0])
725 strlcat(boot_command_line
, " ", COMMAND_LINE_SIZE
);
726 strlcat(boot_command_line
, builtin_cmdline
, COMMAND_LINE_SIZE
);
729 if (BUILTIN_EXTEND_WITH_PROM
&& arcs_cmdline
[0]) {
730 if (boot_command_line
[0])
731 strlcat(boot_command_line
, " ", COMMAND_LINE_SIZE
);
732 strlcat(boot_command_line
, arcs_cmdline
, COMMAND_LINE_SIZE
);
736 strlcpy(command_line
, boot_command_line
, COMMAND_LINE_SIZE
);
738 *cmdline_p
= command_line
;
743 pr_info("User-defined physical RAM map:\n");
748 #ifdef CONFIG_PROC_VMCORE
749 if (setup_elfcorehdr
&& setup_elfcorehdr_size
) {
750 printk(KERN_INFO
"kdump reserved memory at %lx-%lx\n",
751 setup_elfcorehdr
, setup_elfcorehdr_size
);
752 reserve_bootmem(setup_elfcorehdr
, setup_elfcorehdr_size
,
757 mips_parse_crashkernel();
759 if (crashk_res
.start
!= crashk_res
.end
)
760 reserve_bootmem(crashk_res
.start
,
761 crashk_res
.end
- crashk_res
.start
+ 1,
766 plat_swiotlb_setup();
769 dma_contiguous_reserve(PFN_PHYS(max_low_pfn
));
770 /* Tell bootmem about cma reserved memblock section */
771 for_each_memblock(reserved
, reg
)
773 reserve_bootmem(reg
->base
, reg
->size
, BOOTMEM_DEFAULT
);
775 reserve_bootmem_region(__pa_symbol(&__nosave_begin
),
776 __pa_symbol(&__nosave_end
)); /* Reserve for hibernation */
779 static void __init
resource_init(void)
783 if (UNCAC_BASE
!= IO_BASE
)
786 code_resource
.start
= __pa_symbol(&_text
);
787 code_resource
.end
= __pa_symbol(&_etext
) - 1;
788 data_resource
.start
= __pa_symbol(&_etext
);
789 data_resource
.end
= __pa_symbol(&_edata
) - 1;
791 for (i
= 0; i
< boot_mem_map
.nr_map
; i
++) {
792 struct resource
*res
;
793 unsigned long start
, end
;
795 start
= boot_mem_map
.map
[i
].addr
;
796 end
= boot_mem_map
.map
[i
].addr
+ boot_mem_map
.map
[i
].size
- 1;
797 if (start
>= HIGHMEM_START
)
799 if (end
>= HIGHMEM_START
)
800 end
= HIGHMEM_START
- 1;
802 res
= alloc_bootmem(sizeof(struct resource
));
806 res
->flags
= IORESOURCE_MEM
| IORESOURCE_BUSY
;
808 switch (boot_mem_map
.map
[i
].type
) {
810 case BOOT_MEM_INIT_RAM
:
811 case BOOT_MEM_ROM_DATA
:
812 res
->name
= "System RAM";
813 res
->flags
|= IORESOURCE_SYSRAM
;
815 case BOOT_MEM_RESERVED
:
817 res
->name
= "reserved";
820 request_resource(&iomem_resource
, res
);
823 * We don't know which RAM region contains kernel data,
824 * so we try it repeatedly and let the resource manager
827 request_resource(res
, &code_resource
);
828 request_resource(res
, &data_resource
);
829 request_crashkernel(res
);
834 static void __init
prefill_possible_map(void)
836 int i
, possible
= num_possible_cpus();
838 if (possible
> nr_cpu_ids
)
839 possible
= nr_cpu_ids
;
841 for (i
= 0; i
< possible
; i
++)
842 set_cpu_possible(i
, true);
843 for (; i
< NR_CPUS
; i
++)
844 set_cpu_possible(i
, false);
846 nr_cpu_ids
= possible
;
849 static inline void prefill_possible_map(void) {}
852 void __init
setup_arch(char **cmdline_p
)
858 setup_early_fdc_console();
859 #ifdef CONFIG_EARLY_PRINTK
860 setup_early_printk();
865 #if defined(CONFIG_VT)
866 #if defined(CONFIG_VGA_CONSOLE)
867 conswitchp
= &vga_con
;
868 #elif defined(CONFIG_DUMMY_CONSOLE)
869 conswitchp
= &dummy_con
;
873 arch_mem_init(cmdline_p
);
877 prefill_possible_map();
882 unsigned long kernelsp
[NR_CPUS
];
883 unsigned long fw_arg0
, fw_arg1
, fw_arg2
, fw_arg3
;
886 unsigned long fw_passed_dtb
;
889 #ifdef CONFIG_DEBUG_FS
890 struct dentry
*mips_debugfs_dir
;
891 static int __init
debugfs_mips(void)
895 d
= debugfs_create_dir("mips", NULL
);
898 mips_debugfs_dir
= d
;
901 arch_initcall(debugfs_mips
);