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1/*
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
4 * for more details.
5 *
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
12 */
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/initrd.h>
19#include <linux/root_dev.h>
20#include <linux/highmem.h>
21#include <linux/console.h>
22#include <linux/pfn.h>
23#include <linux/debugfs.h>
24#include <linux/kexec.h>
25#include <linux/sizes.h>
26#include <linux/device.h>
27#include <linux/dma-contiguous.h>
28#include <linux/decompress/generic.h>
29#include <linux/of_fdt.h>
30#include <linux/of_reserved_mem.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/dma-coherence.h>
40#include <asm/sections.h>
41#include <asm/setup.h>
42#include <asm/smp-ops.h>
43#include <asm/prom.h>
44
45#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
46const char __section(.appended_dtb) __appended_dtb[0x100000];
47#endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
48
49struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
50
51EXPORT_SYMBOL(cpu_data);
52
53#ifdef CONFIG_VT
54struct screen_info screen_info;
55#endif
56
57/*
58 * Setup information
59 *
60 * These are initialized so they are in the .data section
61 */
62unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
63
64EXPORT_SYMBOL(mips_machtype);
65
66static char __initdata command_line[COMMAND_LINE_SIZE];
67char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
68
69#ifdef CONFIG_CMDLINE_BOOL
70static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
71#endif
72
73/*
74 * mips_io_port_base is the begin of the address space to which x86 style
75 * I/O ports are mapped.
76 */
77unsigned long mips_io_port_base = -1;
78EXPORT_SYMBOL(mips_io_port_base);
79
80static struct resource code_resource = { .name = "Kernel code", };
81static struct resource data_resource = { .name = "Kernel data", };
82static struct resource bss_resource = { .name = "Kernel bss", };
83
84static void *detect_magic __initdata = detect_memory_region;
85
86#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
87unsigned long ARCH_PFN_OFFSET;
88EXPORT_SYMBOL(ARCH_PFN_OFFSET);
89#endif
90
91void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
92{
93 /*
94 * Note: This function only exists for historical reason,
95 * new code should use memblock_add or memblock_add_node instead.
96 */
97
98 /*
99 * If the region reaches the top of the physical address space, adjust
100 * the size slightly so that (start + size) doesn't overflow
101 */
102 if (start + size - 1 == PHYS_ADDR_MAX)
103 --size;
104
105 /* Sanity check */
106 if (start + size < start) {
107 pr_warn("Trying to add an invalid memory region, skipped\n");
108 return;
109 }
110
111 if (start < PHYS_OFFSET)
112 return;
113
114 memblock_add(start, size);
115 /* Reserve any memory except the ordinary RAM ranges. */
116 switch (type) {
117 case BOOT_MEM_RAM:
118 break;
119
120 case BOOT_MEM_NOMAP: /* Discard the range from the system. */
121 memblock_remove(start, size);
122 break;
123
124 default: /* Reserve the rest of the memory types at boot time */
125 memblock_reserve(start, size);
126 break;
127 }
128}
129
130void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
131{
132 void *dm = &detect_magic;
133 phys_addr_t size;
134
135 for (size = sz_min; size < sz_max; size <<= 1) {
136 if (!memcmp(dm, dm + size, sizeof(detect_magic)))
137 break;
138 }
139
140 pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
141 ((unsigned long long) size) / SZ_1M,
142 (unsigned long long) start,
143 ((unsigned long long) sz_min) / SZ_1M,
144 ((unsigned long long) sz_max) / SZ_1M);
145
146 add_memory_region(start, size, BOOT_MEM_RAM);
147}
148
149/*
150 * Manage initrd
151 */
152#ifdef CONFIG_BLK_DEV_INITRD
153
154static int __init rd_start_early(char *p)
155{
156 unsigned long start = memparse(p, &p);
157
158#ifdef CONFIG_64BIT
159 /* Guess if the sign extension was forgotten by bootloader */
160 if (start < XKPHYS)
161 start = (int)start;
162#endif
163 initrd_start = start;
164 initrd_end += start;
165 return 0;
166}
167early_param("rd_start", rd_start_early);
168
169static int __init rd_size_early(char *p)
170{
171 initrd_end += memparse(p, &p);
172 return 0;
173}
174early_param("rd_size", rd_size_early);
175
176/* it returns the next free pfn after initrd */
177static unsigned long __init init_initrd(void)
178{
179 unsigned long end;
180
181 /*
182 * Board specific code or command line parser should have
183 * already set up initrd_start and initrd_end. In these cases
184 * perfom sanity checks and use them if all looks good.
185 */
186 if (!initrd_start || initrd_end <= initrd_start)
187 goto disable;
188
189 if (initrd_start & ~PAGE_MASK) {
190 pr_err("initrd start must be page aligned\n");
191 goto disable;
192 }
193 if (initrd_start < PAGE_OFFSET) {
194 pr_err("initrd start < PAGE_OFFSET\n");
195 goto disable;
196 }
197
198 /*
199 * Sanitize initrd addresses. For example firmware
200 * can't guess if they need to pass them through
201 * 64-bits values if the kernel has been built in pure
202 * 32-bit. We need also to switch from KSEG0 to XKPHYS
203 * addresses now, so the code can now safely use __pa().
204 */
205 end = __pa(initrd_end);
206 initrd_end = (unsigned long)__va(end);
207 initrd_start = (unsigned long)__va(__pa(initrd_start));
208
209 ROOT_DEV = Root_RAM0;
210 return PFN_UP(end);
211disable:
212 initrd_start = 0;
213 initrd_end = 0;
214 return 0;
215}
216
217/* In some conditions (e.g. big endian bootloader with a little endian
218 kernel), the initrd might appear byte swapped. Try to detect this and
219 byte swap it if needed. */
220static void __init maybe_bswap_initrd(void)
221{
222#if defined(CONFIG_CPU_CAVIUM_OCTEON)
223 u64 buf;
224
225 /* Check for CPIO signature */
226 if (!memcmp((void *)initrd_start, "070701", 6))
227 return;
228
229 /* Check for compressed initrd */
230 if (decompress_method((unsigned char *)initrd_start, 8, NULL))
231 return;
232
233 /* Try again with a byte swapped header */
234 buf = swab64p((u64 *)initrd_start);
235 if (!memcmp(&buf, "070701", 6) ||
236 decompress_method((unsigned char *)(&buf), 8, NULL)) {
237 unsigned long i;
238
239 pr_info("Byteswapped initrd detected\n");
240 for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8)
241 swab64s((u64 *)i);
242 }
243#endif
244}
245
246static void __init finalize_initrd(void)
247{
248 unsigned long size = initrd_end - initrd_start;
249
250 if (size == 0) {
251 printk(KERN_INFO "Initrd not found or empty");
252 goto disable;
253 }
254 if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
255 printk(KERN_ERR "Initrd extends beyond end of memory");
256 goto disable;
257 }
258
259 maybe_bswap_initrd();
260
261 memblock_reserve(__pa(initrd_start), size);
262 initrd_below_start_ok = 1;
263
264 pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
265 initrd_start, size);
266 return;
267disable:
268 printk(KERN_CONT " - disabling initrd\n");
269 initrd_start = 0;
270 initrd_end = 0;
271}
272
273#else /* !CONFIG_BLK_DEV_INITRD */
274
275static unsigned long __init init_initrd(void)
276{
277 return 0;
278}
279
280#define finalize_initrd() do {} while (0)
281
282#endif
283
284/*
285 * Initialize the bootmem allocator. It also setup initrd related data
286 * if needed.
287 */
288#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA))
289
290static void __init bootmem_init(void)
291{
292 init_initrd();
293 finalize_initrd();
294}
295
296#else /* !CONFIG_SGI_IP27 */
297
298static void __init bootmem_init(void)
299{
300 struct memblock_region *mem;
301 phys_addr_t ramstart, ramend;
302
303 ramstart = memblock_start_of_DRAM();
304 ramend = memblock_end_of_DRAM();
305
306 /*
307 * Sanity check any INITRD first. We don't take it into account
308 * for bootmem setup initially, rely on the end-of-kernel-code
309 * as our memory range starting point. Once bootmem is inited we
310 * will reserve the area used for the initrd.
311 */
312 init_initrd();
313
314 /* Reserve memory occupied by kernel. */
315 memblock_reserve(__pa_symbol(&_text),
316 __pa_symbol(&_end) - __pa_symbol(&_text));
317
318 /* max_low_pfn is not a number of pages but the end pfn of low mem */
319
320#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
321 ARCH_PFN_OFFSET = PFN_UP(ramstart);
322#else
323 /*
324 * Reserve any memory between the start of RAM and PHYS_OFFSET
325 */
326 if (ramstart > PHYS_OFFSET)
327 memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
328
329 if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) {
330 pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
331 (unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)),
332 (unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET));
333 }
334#endif
335
336 min_low_pfn = ARCH_PFN_OFFSET;
337 max_pfn = PFN_DOWN(ramend);
338 for_each_memblock(memory, mem) {
339 unsigned long start = memblock_region_memory_base_pfn(mem);
340 unsigned long end = memblock_region_memory_end_pfn(mem);
341
342 /*
343 * Skip highmem here so we get an accurate max_low_pfn if low
344 * memory stops short of high memory.
345 * If the region overlaps HIGHMEM_START, end is clipped so
346 * max_pfn excludes the highmem portion.
347 */
348 if (memblock_is_nomap(mem))
349 continue;
350 if (start >= PFN_DOWN(HIGHMEM_START))
351 continue;
352 if (end > PFN_DOWN(HIGHMEM_START))
353 end = PFN_DOWN(HIGHMEM_START);
354 if (end > max_low_pfn)
355 max_low_pfn = end;
356 }
357
358 if (min_low_pfn >= max_low_pfn)
359 panic("Incorrect memory mapping !!!");
360
361 if (max_pfn > PFN_DOWN(HIGHMEM_START)) {
362#ifdef CONFIG_HIGHMEM
363 highstart_pfn = PFN_DOWN(HIGHMEM_START);
364 highend_pfn = max_pfn;
365#else
366 max_low_pfn = PFN_DOWN(HIGHMEM_START);
367 max_pfn = max_low_pfn;
368#endif
369 }
370
371
372 /*
373 * In any case the added to the memblock memory regions
374 * (highmem/lowmem, available/reserved, etc) are considered
375 * as present, so inform sparsemem about them.
376 */
377 memblocks_present();
378
379 /*
380 * Reserve initrd memory if needed.
381 */
382 finalize_initrd();
383}
384
385#endif /* CONFIG_SGI_IP27 */
386
387static int usermem __initdata;
388
389static int __init early_parse_mem(char *p)
390{
391 phys_addr_t start, size;
392
393 /*
394 * If a user specifies memory size, we
395 * blow away any automatically generated
396 * size.
397 */
398 if (usermem == 0) {
399 usermem = 1;
400 memblock_remove(memblock_start_of_DRAM(),
401 memblock_end_of_DRAM() - memblock_start_of_DRAM());
402 }
403 start = 0;
404 size = memparse(p, &p);
405 if (*p == '@')
406 start = memparse(p + 1, &p);
407
408 add_memory_region(start, size, BOOT_MEM_RAM);
409
410 return 0;
411}
412early_param("mem", early_parse_mem);
413
414static int __init early_parse_memmap(char *p)
415{
416 char *oldp;
417 u64 start_at, mem_size;
418
419 if (!p)
420 return -EINVAL;
421
422 if (!strncmp(p, "exactmap", 8)) {
423 pr_err("\"memmap=exactmap\" invalid on MIPS\n");
424 return 0;
425 }
426
427 oldp = p;
428 mem_size = memparse(p, &p);
429 if (p == oldp)
430 return -EINVAL;
431
432 if (*p == '@') {
433 start_at = memparse(p+1, &p);
434 add_memory_region(start_at, mem_size, BOOT_MEM_RAM);
435 } else if (*p == '#') {
436 pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n");
437 return -EINVAL;
438 } else if (*p == '$') {
439 start_at = memparse(p+1, &p);
440 add_memory_region(start_at, mem_size, BOOT_MEM_RESERVED);
441 } else {
442 pr_err("\"memmap\" invalid format!\n");
443 return -EINVAL;
444 }
445
446 if (*p == '\0') {
447 usermem = 1;
448 return 0;
449 } else
450 return -EINVAL;
451}
452early_param("memmap", early_parse_memmap);
453
454#ifdef CONFIG_PROC_VMCORE
455unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
456static int __init early_parse_elfcorehdr(char *p)
457{
458 struct memblock_region *mem;
459
460 setup_elfcorehdr = memparse(p, &p);
461
462 for_each_memblock(memory, mem) {
463 unsigned long start = mem->base;
464 unsigned long end = start + mem->size;
465 if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
466 /*
467 * Reserve from the elf core header to the end of
468 * the memory segment, that should all be kdump
469 * reserved memory.
470 */
471 setup_elfcorehdr_size = end - setup_elfcorehdr;
472 break;
473 }
474 }
475 /*
476 * If we don't find it in the memory map, then we shouldn't
477 * have to worry about it, as the new kernel won't use it.
478 */
479 return 0;
480}
481early_param("elfcorehdr", early_parse_elfcorehdr);
482#endif
483
484#ifdef CONFIG_KEXEC
485static void __init mips_parse_crashkernel(void)
486{
487 unsigned long long total_mem;
488 unsigned long long crash_size, crash_base;
489 int ret;
490
491 total_mem = memblock_phys_mem_size();
492 ret = parse_crashkernel(boot_command_line, total_mem,
493 &crash_size, &crash_base);
494 if (ret != 0 || crash_size <= 0)
495 return;
496
497 if (!memblock_find_in_range(crash_base, crash_base + crash_size, crash_size, 0)) {
498 pr_warn("Invalid memory region reserved for crash kernel\n");
499 return;
500 }
501
502 crashk_res.start = crash_base;
503 crashk_res.end = crash_base + crash_size - 1;
504}
505
506static void __init request_crashkernel(struct resource *res)
507{
508 int ret;
509
510 if (crashk_res.start == crashk_res.end)
511 return;
512
513 ret = request_resource(res, &crashk_res);
514 if (!ret)
515 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
516 (unsigned long)((crashk_res.end -
517 crashk_res.start + 1) >> 20),
518 (unsigned long)(crashk_res.start >> 20));
519}
520#else /* !defined(CONFIG_KEXEC) */
521static void __init mips_parse_crashkernel(void)
522{
523}
524
525static void __init request_crashkernel(struct resource *res)
526{
527}
528#endif /* !defined(CONFIG_KEXEC) */
529
530static void __init check_kernel_sections_mem(void)
531{
532 phys_addr_t start = PFN_PHYS(PFN_DOWN(__pa_symbol(&_text)));
533 phys_addr_t size = PFN_PHYS(PFN_UP(__pa_symbol(&_end))) - start;
534
535 if (!memblock_is_region_memory(start, size)) {
536 pr_info("Kernel sections are not in the memory maps\n");
537 memblock_add(start, size);
538 }
539}
540
541#define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER)
542#define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB)
543#define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)
544#define BUILTIN_EXTEND_WITH_PROM \
545 IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)
546
547/*
548 * arch_mem_init - initialize memory management subsystem
549 *
550 * o plat_mem_setup() detects the memory configuration and will record detected
551 * memory areas using add_memory_region.
552 *
553 * At this stage the memory configuration of the system is known to the
554 * kernel but generic memory management system is still entirely uninitialized.
555 *
556 * o bootmem_init()
557 * o sparse_init()
558 * o paging_init()
559 * o dma_contiguous_reserve()
560 *
561 * At this stage the bootmem allocator is ready to use.
562 *
563 * NOTE: historically plat_mem_setup did the entire platform initialization.
564 * This was rather impractical because it meant plat_mem_setup had to
565 * get away without any kind of memory allocator. To keep old code from
566 * breaking plat_setup was just renamed to plat_mem_setup and a second platform
567 * initialization hook for anything else was introduced.
568 */
569static void __init arch_mem_init(char **cmdline_p)
570{
571 extern void plat_mem_setup(void);
572
573 /*
574 * Initialize boot_command_line to an innocuous but non-empty string in
575 * order to prevent early_init_dt_scan_chosen() from copying
576 * CONFIG_CMDLINE into it without our knowledge. We handle
577 * CONFIG_CMDLINE ourselves below & don't want to duplicate its
578 * content because repeating arguments can be problematic.
579 */
580 strlcpy(boot_command_line, " ", COMMAND_LINE_SIZE);
581
582 /* call board setup routine */
583 plat_mem_setup();
584 memblock_set_bottom_up(true);
585
586#if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
587 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
588#else
589 if ((USE_PROM_CMDLINE && arcs_cmdline[0]) ||
590 (USE_DTB_CMDLINE && !boot_command_line[0]))
591 strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
592
593 if (EXTEND_WITH_PROM && arcs_cmdline[0]) {
594 if (boot_command_line[0])
595 strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
596 strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
597 }
598
599#if defined(CONFIG_CMDLINE_BOOL)
600 if (builtin_cmdline[0]) {
601 if (boot_command_line[0])
602 strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
603 strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
604 }
605
606 if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) {
607 if (boot_command_line[0])
608 strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
609 strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
610 }
611#endif
612#endif
613 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
614
615 *cmdline_p = command_line;
616
617 parse_early_param();
618
619 if (usermem)
620 pr_info("User-defined physical RAM map overwrite\n");
621
622 check_kernel_sections_mem();
623
624 early_init_fdt_reserve_self();
625 early_init_fdt_scan_reserved_mem();
626
627#ifndef CONFIG_NUMA
628 memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
629#endif
630 bootmem_init();
631
632 /*
633 * Prevent memblock from allocating high memory.
634 * This cannot be done before max_low_pfn is detected, so up
635 * to this point is possible to only reserve physical memory
636 * with memblock_reserve; memblock_alloc* can be used
637 * only after this point
638 */
639 memblock_set_current_limit(PFN_PHYS(max_low_pfn));
640
641#ifdef CONFIG_PROC_VMCORE
642 if (setup_elfcorehdr && setup_elfcorehdr_size) {
643 printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
644 setup_elfcorehdr, setup_elfcorehdr_size);
645 memblock_reserve(setup_elfcorehdr, setup_elfcorehdr_size);
646 }
647#endif
648
649 mips_parse_crashkernel();
650#ifdef CONFIG_KEXEC
651 if (crashk_res.start != crashk_res.end)
652 memblock_reserve(crashk_res.start,
653 crashk_res.end - crashk_res.start + 1);
654#endif
655 device_tree_init();
656 sparse_init();
657 plat_swiotlb_setup();
658
659 dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
660
661 /* Reserve for hibernation. */
662 memblock_reserve(__pa_symbol(&__nosave_begin),
663 __pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
664
665 fdt_init_reserved_mem();
666
667 memblock_dump_all();
668
669 early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));
670}
671
672static void __init resource_init(void)
673{
674 struct memblock_region *region;
675
676 if (UNCAC_BASE != IO_BASE)
677 return;
678
679 code_resource.start = __pa_symbol(&_text);
680 code_resource.end = __pa_symbol(&_etext) - 1;
681 data_resource.start = __pa_symbol(&_etext);
682 data_resource.end = __pa_symbol(&_edata) - 1;
683 bss_resource.start = __pa_symbol(&__bss_start);
684 bss_resource.end = __pa_symbol(&__bss_stop) - 1;
685
686 for_each_memblock(memory, region) {
687 phys_addr_t start = PFN_PHYS(memblock_region_memory_base_pfn(region));
688 phys_addr_t end = PFN_PHYS(memblock_region_memory_end_pfn(region)) - 1;
689 struct resource *res;
690
691 res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
692 if (!res)
693 panic("%s: Failed to allocate %zu bytes\n", __func__,
694 sizeof(struct resource));
695
696 res->start = start;
697 res->end = end;
698 res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
699 res->name = "System RAM";
700
701 request_resource(&iomem_resource, res);
702
703 /*
704 * We don't know which RAM region contains kernel data,
705 * so we try it repeatedly and let the resource manager
706 * test it.
707 */
708 request_resource(res, &code_resource);
709 request_resource(res, &data_resource);
710 request_resource(res, &bss_resource);
711 request_crashkernel(res);
712 }
713}
714
715#ifdef CONFIG_SMP
716static void __init prefill_possible_map(void)
717{
718 int i, possible = num_possible_cpus();
719
720 if (possible > nr_cpu_ids)
721 possible = nr_cpu_ids;
722
723 for (i = 0; i < possible; i++)
724 set_cpu_possible(i, true);
725 for (; i < NR_CPUS; i++)
726 set_cpu_possible(i, false);
727
728 nr_cpu_ids = possible;
729}
730#else
731static inline void prefill_possible_map(void) {}
732#endif
733
734void __init setup_arch(char **cmdline_p)
735{
736 cpu_probe();
737 mips_cm_probe();
738 prom_init();
739
740 setup_early_fdc_console();
741#ifdef CONFIG_EARLY_PRINTK
742 setup_early_printk();
743#endif
744 cpu_report();
745 check_bugs_early();
746
747#if defined(CONFIG_VT)
748#if defined(CONFIG_VGA_CONSOLE)
749 conswitchp = &vga_con;
750#elif defined(CONFIG_DUMMY_CONSOLE)
751 conswitchp = &dummy_con;
752#endif
753#endif
754
755 arch_mem_init(cmdline_p);
756
757 resource_init();
758 plat_smp_setup();
759 prefill_possible_map();
760
761 cpu_cache_init();
762 paging_init();
763}
764
765unsigned long kernelsp[NR_CPUS];
766unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
767
768#ifdef CONFIG_USE_OF
769unsigned long fw_passed_dtb;
770#endif
771
772#ifdef CONFIG_DEBUG_FS
773struct dentry *mips_debugfs_dir;
774static int __init debugfs_mips(void)
775{
776 mips_debugfs_dir = debugfs_create_dir("mips", NULL);
777 return 0;
778}
779arch_initcall(debugfs_mips);
780#endif
781
782#ifdef CONFIG_DMA_MAYBE_COHERENT
783/* User defined DMA coherency from command line. */
784enum coherent_io_user_state coherentio = IO_COHERENCE_DEFAULT;
785EXPORT_SYMBOL_GPL(coherentio);
786int hw_coherentio = 0; /* Actual hardware supported DMA coherency setting. */
787
788static int __init setcoherentio(char *str)
789{
790 coherentio = IO_COHERENCE_ENABLED;
791 pr_info("Hardware DMA cache coherency (command line)\n");
792 return 0;
793}
794early_param("coherentio", setcoherentio);
795
796static int __init setnocoherentio(char *str)
797{
798 coherentio = IO_COHERENCE_DISABLED;
799 pr_info("Software DMA cache coherency (command line)\n");
800 return 0;
801}
802early_param("nocoherentio", setnocoherentio);
803#endif
1/*
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
4 * for more details.
5 *
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
12 */
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
28#include <asm/addrspace.h>
29#include <asm/bootinfo.h>
30#include <asm/bugs.h>
31#include <asm/cache.h>
32#include <asm/cpu.h>
33#include <asm/sections.h>
34#include <asm/setup.h>
35#include <asm/smp-ops.h>
36#include <asm/prom.h>
37
38struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
39
40EXPORT_SYMBOL(cpu_data);
41
42#ifdef CONFIG_VT
43struct screen_info screen_info;
44#endif
45
46/*
47 * Despite it's name this variable is even if we don't have PCI
48 */
49unsigned int PCI_DMA_BUS_IS_PHYS;
50
51EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS);
52
53/*
54 * Setup information
55 *
56 * These are initialized so they are in the .data section
57 */
58unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
59
60EXPORT_SYMBOL(mips_machtype);
61
62struct boot_mem_map boot_mem_map;
63
64static char __initdata command_line[COMMAND_LINE_SIZE];
65char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
66
67#ifdef CONFIG_CMDLINE_BOOL
68static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
69#endif
70
71/*
72 * mips_io_port_base is the begin of the address space to which x86 style
73 * I/O ports are mapped.
74 */
75const unsigned long mips_io_port_base = -1;
76EXPORT_SYMBOL(mips_io_port_base);
77
78static struct resource code_resource = { .name = "Kernel code", };
79static struct resource data_resource = { .name = "Kernel data", };
80
81static void *detect_magic __initdata = detect_memory_region;
82
83void __init add_memory_region(phys_t start, phys_t size, long type)
84{
85 int x = boot_mem_map.nr_map;
86 int i;
87
88 /* Sanity check */
89 if (start + size < start) {
90 pr_warning("Trying to add an invalid memory region, skipped\n");
91 return;
92 }
93
94 /*
95 * Try to merge with existing entry, if any.
96 */
97 for (i = 0; i < boot_mem_map.nr_map; i++) {
98 struct boot_mem_map_entry *entry = boot_mem_map.map + i;
99 unsigned long top;
100
101 if (entry->type != type)
102 continue;
103
104 if (start + size < entry->addr)
105 continue; /* no overlap */
106
107 if (entry->addr + entry->size < start)
108 continue; /* no overlap */
109
110 top = max(entry->addr + entry->size, start + size);
111 entry->addr = min(entry->addr, start);
112 entry->size = top - entry->addr;
113
114 return;
115 }
116
117 if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) {
118 pr_err("Ooops! Too many entries in the memory map!\n");
119 return;
120 }
121
122 boot_mem_map.map[x].addr = start;
123 boot_mem_map.map[x].size = size;
124 boot_mem_map.map[x].type = type;
125 boot_mem_map.nr_map++;
126}
127
128void __init detect_memory_region(phys_t start, phys_t sz_min, phys_t sz_max)
129{
130 void *dm = &detect_magic;
131 phys_t size;
132
133 for (size = sz_min; size < sz_max; size <<= 1) {
134 if (!memcmp(dm, dm + size, sizeof(detect_magic)))
135 break;
136 }
137
138 pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
139 ((unsigned long long) size) / SZ_1M,
140 (unsigned long long) start,
141 ((unsigned long long) sz_min) / SZ_1M,
142 ((unsigned long long) sz_max) / SZ_1M);
143
144 add_memory_region(start, size, BOOT_MEM_RAM);
145}
146
147static void __init print_memory_map(void)
148{
149 int i;
150 const int field = 2 * sizeof(unsigned long);
151
152 for (i = 0; i < boot_mem_map.nr_map; i++) {
153 printk(KERN_INFO " memory: %0*Lx @ %0*Lx ",
154 field, (unsigned long long) boot_mem_map.map[i].size,
155 field, (unsigned long long) boot_mem_map.map[i].addr);
156
157 switch (boot_mem_map.map[i].type) {
158 case BOOT_MEM_RAM:
159 printk(KERN_CONT "(usable)\n");
160 break;
161 case BOOT_MEM_INIT_RAM:
162 printk(KERN_CONT "(usable after init)\n");
163 break;
164 case BOOT_MEM_ROM_DATA:
165 printk(KERN_CONT "(ROM data)\n");
166 break;
167 case BOOT_MEM_RESERVED:
168 printk(KERN_CONT "(reserved)\n");
169 break;
170 default:
171 printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type);
172 break;
173 }
174 }
175}
176
177/*
178 * Manage initrd
179 */
180#ifdef CONFIG_BLK_DEV_INITRD
181
182static int __init rd_start_early(char *p)
183{
184 unsigned long start = memparse(p, &p);
185
186#ifdef CONFIG_64BIT
187 /* Guess if the sign extension was forgotten by bootloader */
188 if (start < XKPHYS)
189 start = (int)start;
190#endif
191 initrd_start = start;
192 initrd_end += start;
193 return 0;
194}
195early_param("rd_start", rd_start_early);
196
197static int __init rd_size_early(char *p)
198{
199 initrd_end += memparse(p, &p);
200 return 0;
201}
202early_param("rd_size", rd_size_early);
203
204/* it returns the next free pfn after initrd */
205static unsigned long __init init_initrd(void)
206{
207 unsigned long end;
208
209 /*
210 * Board specific code or command line parser should have
211 * already set up initrd_start and initrd_end. In these cases
212 * perfom sanity checks and use them if all looks good.
213 */
214 if (!initrd_start || initrd_end <= initrd_start)
215 goto disable;
216
217 if (initrd_start & ~PAGE_MASK) {
218 pr_err("initrd start must be page aligned\n");
219 goto disable;
220 }
221 if (initrd_start < PAGE_OFFSET) {
222 pr_err("initrd start < PAGE_OFFSET\n");
223 goto disable;
224 }
225
226 /*
227 * Sanitize initrd addresses. For example firmware
228 * can't guess if they need to pass them through
229 * 64-bits values if the kernel has been built in pure
230 * 32-bit. We need also to switch from KSEG0 to XKPHYS
231 * addresses now, so the code can now safely use __pa().
232 */
233 end = __pa(initrd_end);
234 initrd_end = (unsigned long)__va(end);
235 initrd_start = (unsigned long)__va(__pa(initrd_start));
236
237 ROOT_DEV = Root_RAM0;
238 return PFN_UP(end);
239disable:
240 initrd_start = 0;
241 initrd_end = 0;
242 return 0;
243}
244
245static void __init finalize_initrd(void)
246{
247 unsigned long size = initrd_end - initrd_start;
248
249 if (size == 0) {
250 printk(KERN_INFO "Initrd not found or empty");
251 goto disable;
252 }
253 if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
254 printk(KERN_ERR "Initrd extends beyond end of memory");
255 goto disable;
256 }
257
258 reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
259 initrd_below_start_ok = 1;
260
261 pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
262 initrd_start, size);
263 return;
264disable:
265 printk(KERN_CONT " - disabling initrd\n");
266 initrd_start = 0;
267 initrd_end = 0;
268}
269
270#else /* !CONFIG_BLK_DEV_INITRD */
271
272static unsigned long __init init_initrd(void)
273{
274 return 0;
275}
276
277#define finalize_initrd() do {} while (0)
278
279#endif
280
281/*
282 * Initialize the bootmem allocator. It also setup initrd related data
283 * if needed.
284 */
285#ifdef CONFIG_SGI_IP27
286
287static void __init bootmem_init(void)
288{
289 init_initrd();
290 finalize_initrd();
291}
292
293#else /* !CONFIG_SGI_IP27 */
294
295static void __init bootmem_init(void)
296{
297 unsigned long reserved_end;
298 unsigned long mapstart = ~0UL;
299 unsigned long bootmap_size;
300 int i;
301
302 /*
303 * Sanity check any INITRD first. We don't take it into account
304 * for bootmem setup initially, rely on the end-of-kernel-code
305 * as our memory range starting point. Once bootmem is inited we
306 * will reserve the area used for the initrd.
307 */
308 init_initrd();
309 reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
310
311 /*
312 * max_low_pfn is not a number of pages. The number of pages
313 * of the system is given by 'max_low_pfn - min_low_pfn'.
314 */
315 min_low_pfn = ~0UL;
316 max_low_pfn = 0;
317
318 /*
319 * Find the highest page frame number we have available.
320 */
321 for (i = 0; i < boot_mem_map.nr_map; i++) {
322 unsigned long start, end;
323
324 if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
325 continue;
326
327 start = PFN_UP(boot_mem_map.map[i].addr);
328 end = PFN_DOWN(boot_mem_map.map[i].addr
329 + boot_mem_map.map[i].size);
330
331 if (end > max_low_pfn)
332 max_low_pfn = end;
333 if (start < min_low_pfn)
334 min_low_pfn = start;
335 if (end <= reserved_end)
336 continue;
337 if (start >= mapstart)
338 continue;
339 mapstart = max(reserved_end, start);
340 }
341
342 if (min_low_pfn >= max_low_pfn)
343 panic("Incorrect memory mapping !!!");
344 if (min_low_pfn > ARCH_PFN_OFFSET) {
345 pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
346 (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
347 min_low_pfn - ARCH_PFN_OFFSET);
348 } else if (min_low_pfn < ARCH_PFN_OFFSET) {
349 pr_info("%lu free pages won't be used\n",
350 ARCH_PFN_OFFSET - min_low_pfn);
351 }
352 min_low_pfn = ARCH_PFN_OFFSET;
353
354 /*
355 * Determine low and high memory ranges
356 */
357 max_pfn = max_low_pfn;
358 if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
359#ifdef CONFIG_HIGHMEM
360 highstart_pfn = PFN_DOWN(HIGHMEM_START);
361 highend_pfn = max_low_pfn;
362#endif
363 max_low_pfn = PFN_DOWN(HIGHMEM_START);
364 }
365
366#ifdef CONFIG_BLK_DEV_INITRD
367 /*
368 * mapstart should be after initrd_end
369 */
370 if (initrd_end)
371 mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end)));
372#endif
373
374 /*
375 * Initialize the boot-time allocator with low memory only.
376 */
377 bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart,
378 min_low_pfn, max_low_pfn);
379
380
381 for (i = 0; i < boot_mem_map.nr_map; i++) {
382 unsigned long start, end;
383
384 start = PFN_UP(boot_mem_map.map[i].addr);
385 end = PFN_DOWN(boot_mem_map.map[i].addr
386 + boot_mem_map.map[i].size);
387
388 if (start <= min_low_pfn)
389 start = min_low_pfn;
390 if (start >= end)
391 continue;
392
393#ifndef CONFIG_HIGHMEM
394 if (end > max_low_pfn)
395 end = max_low_pfn;
396
397 /*
398 * ... finally, is the area going away?
399 */
400 if (end <= start)
401 continue;
402#endif
403
404 memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0);
405 }
406
407 /*
408 * Register fully available low RAM pages with the bootmem allocator.
409 */
410 for (i = 0; i < boot_mem_map.nr_map; i++) {
411 unsigned long start, end, size;
412
413 start = PFN_UP(boot_mem_map.map[i].addr);
414 end = PFN_DOWN(boot_mem_map.map[i].addr
415 + boot_mem_map.map[i].size);
416
417 /*
418 * Reserve usable memory.
419 */
420 switch (boot_mem_map.map[i].type) {
421 case BOOT_MEM_RAM:
422 break;
423 case BOOT_MEM_INIT_RAM:
424 memory_present(0, start, end);
425 continue;
426 default:
427 /* Not usable memory */
428 continue;
429 }
430
431 /*
432 * We are rounding up the start address of usable memory
433 * and at the end of the usable range downwards.
434 */
435 if (start >= max_low_pfn)
436 continue;
437 if (start < reserved_end)
438 start = reserved_end;
439 if (end > max_low_pfn)
440 end = max_low_pfn;
441
442 /*
443 * ... finally, is the area going away?
444 */
445 if (end <= start)
446 continue;
447 size = end - start;
448
449 /* Register lowmem ranges */
450 free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
451 memory_present(0, start, end);
452 }
453
454 /*
455 * Reserve the bootmap memory.
456 */
457 reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
458
459 /*
460 * Reserve initrd memory if needed.
461 */
462 finalize_initrd();
463}
464
465#endif /* CONFIG_SGI_IP27 */
466
467/*
468 * arch_mem_init - initialize memory management subsystem
469 *
470 * o plat_mem_setup() detects the memory configuration and will record detected
471 * memory areas using add_memory_region.
472 *
473 * At this stage the memory configuration of the system is known to the
474 * kernel but generic memory management system is still entirely uninitialized.
475 *
476 * o bootmem_init()
477 * o sparse_init()
478 * o paging_init()
479 *
480 * At this stage the bootmem allocator is ready to use.
481 *
482 * NOTE: historically plat_mem_setup did the entire platform initialization.
483 * This was rather impractical because it meant plat_mem_setup had to
484 * get away without any kind of memory allocator. To keep old code from
485 * breaking plat_setup was just renamed to plat_setup and a second platform
486 * initialization hook for anything else was introduced.
487 */
488
489static int usermem __initdata;
490
491static int __init early_parse_mem(char *p)
492{
493 unsigned long start, size;
494
495 /*
496 * If a user specifies memory size, we
497 * blow away any automatically generated
498 * size.
499 */
500 if (usermem == 0) {
501 boot_mem_map.nr_map = 0;
502 usermem = 1;
503 }
504 start = 0;
505 size = memparse(p, &p);
506 if (*p == '@')
507 start = memparse(p + 1, &p);
508
509 add_memory_region(start, size, BOOT_MEM_RAM);
510 return 0;
511}
512early_param("mem", early_parse_mem);
513
514#ifdef CONFIG_PROC_VMCORE
515unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
516static int __init early_parse_elfcorehdr(char *p)
517{
518 int i;
519
520 setup_elfcorehdr = memparse(p, &p);
521
522 for (i = 0; i < boot_mem_map.nr_map; i++) {
523 unsigned long start = boot_mem_map.map[i].addr;
524 unsigned long end = (boot_mem_map.map[i].addr +
525 boot_mem_map.map[i].size);
526 if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
527 /*
528 * Reserve from the elf core header to the end of
529 * the memory segment, that should all be kdump
530 * reserved memory.
531 */
532 setup_elfcorehdr_size = end - setup_elfcorehdr;
533 break;
534 }
535 }
536 /*
537 * If we don't find it in the memory map, then we shouldn't
538 * have to worry about it, as the new kernel won't use it.
539 */
540 return 0;
541}
542early_param("elfcorehdr", early_parse_elfcorehdr);
543#endif
544
545static void __init arch_mem_addpart(phys_t mem, phys_t end, int type)
546{
547 phys_t size;
548 int i;
549
550 size = end - mem;
551 if (!size)
552 return;
553
554 /* Make sure it is in the boot_mem_map */
555 for (i = 0; i < boot_mem_map.nr_map; i++) {
556 if (mem >= boot_mem_map.map[i].addr &&
557 mem < (boot_mem_map.map[i].addr +
558 boot_mem_map.map[i].size))
559 return;
560 }
561 add_memory_region(mem, size, type);
562}
563
564#ifdef CONFIG_KEXEC
565static inline unsigned long long get_total_mem(void)
566{
567 unsigned long long total;
568
569 total = max_pfn - min_low_pfn;
570 return total << PAGE_SHIFT;
571}
572
573static void __init mips_parse_crashkernel(void)
574{
575 unsigned long long total_mem;
576 unsigned long long crash_size, crash_base;
577 int ret;
578
579 total_mem = get_total_mem();
580 ret = parse_crashkernel(boot_command_line, total_mem,
581 &crash_size, &crash_base);
582 if (ret != 0 || crash_size <= 0)
583 return;
584
585 crashk_res.start = crash_base;
586 crashk_res.end = crash_base + crash_size - 1;
587}
588
589static void __init request_crashkernel(struct resource *res)
590{
591 int ret;
592
593 ret = request_resource(res, &crashk_res);
594 if (!ret)
595 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
596 (unsigned long)((crashk_res.end -
597 crashk_res.start + 1) >> 20),
598 (unsigned long)(crashk_res.start >> 20));
599}
600#else /* !defined(CONFIG_KEXEC) */
601static void __init mips_parse_crashkernel(void)
602{
603}
604
605static void __init request_crashkernel(struct resource *res)
606{
607}
608#endif /* !defined(CONFIG_KEXEC) */
609
610static void __init arch_mem_init(char **cmdline_p)
611{
612 extern void plat_mem_setup(void);
613
614 /* call board setup routine */
615 plat_mem_setup();
616
617 /*
618 * Make sure all kernel memory is in the maps. The "UP" and
619 * "DOWN" are opposite for initdata since if it crosses over
620 * into another memory section you don't want that to be
621 * freed when the initdata is freed.
622 */
623 arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
624 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
625 BOOT_MEM_RAM);
626 arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
627 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
628 BOOT_MEM_INIT_RAM);
629
630 pr_info("Determined physical RAM map:\n");
631 print_memory_map();
632
633#ifdef CONFIG_CMDLINE_BOOL
634#ifdef CONFIG_CMDLINE_OVERRIDE
635 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
636#else
637 if (builtin_cmdline[0]) {
638 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
639 strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE);
640 }
641 strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
642#endif
643#else
644 strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
645#endif
646 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
647
648 *cmdline_p = command_line;
649
650 parse_early_param();
651
652 if (usermem) {
653 pr_info("User-defined physical RAM map:\n");
654 print_memory_map();
655 }
656
657 bootmem_init();
658#ifdef CONFIG_PROC_VMCORE
659 if (setup_elfcorehdr && setup_elfcorehdr_size) {
660 printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
661 setup_elfcorehdr, setup_elfcorehdr_size);
662 reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
663 BOOTMEM_DEFAULT);
664 }
665#endif
666
667 mips_parse_crashkernel();
668#ifdef CONFIG_KEXEC
669 if (crashk_res.start != crashk_res.end)
670 reserve_bootmem(crashk_res.start,
671 crashk_res.end - crashk_res.start + 1,
672 BOOTMEM_DEFAULT);
673#endif
674 device_tree_init();
675 sparse_init();
676 plat_swiotlb_setup();
677 paging_init();
678}
679
680static void __init resource_init(void)
681{
682 int i;
683
684 if (UNCAC_BASE != IO_BASE)
685 return;
686
687 code_resource.start = __pa_symbol(&_text);
688 code_resource.end = __pa_symbol(&_etext) - 1;
689 data_resource.start = __pa_symbol(&_etext);
690 data_resource.end = __pa_symbol(&_edata) - 1;
691
692 for (i = 0; i < boot_mem_map.nr_map; i++) {
693 struct resource *res;
694 unsigned long start, end;
695
696 start = boot_mem_map.map[i].addr;
697 end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
698 if (start >= HIGHMEM_START)
699 continue;
700 if (end >= HIGHMEM_START)
701 end = HIGHMEM_START - 1;
702
703 res = alloc_bootmem(sizeof(struct resource));
704 switch (boot_mem_map.map[i].type) {
705 case BOOT_MEM_RAM:
706 case BOOT_MEM_INIT_RAM:
707 case BOOT_MEM_ROM_DATA:
708 res->name = "System RAM";
709 break;
710 case BOOT_MEM_RESERVED:
711 default:
712 res->name = "reserved";
713 }
714
715 res->start = start;
716 res->end = end;
717
718 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
719 request_resource(&iomem_resource, res);
720
721 /*
722 * We don't know which RAM region contains kernel data,
723 * so we try it repeatedly and let the resource manager
724 * test it.
725 */
726 request_resource(res, &code_resource);
727 request_resource(res, &data_resource);
728 request_crashkernel(res);
729 }
730}
731
732void __init setup_arch(char **cmdline_p)
733{
734 cpu_probe();
735 prom_init();
736
737#ifdef CONFIG_EARLY_PRINTK
738 setup_early_printk();
739#endif
740 cpu_report();
741 check_bugs_early();
742
743#if defined(CONFIG_VT)
744#if defined(CONFIG_VGA_CONSOLE)
745 conswitchp = &vga_con;
746#elif defined(CONFIG_DUMMY_CONSOLE)
747 conswitchp = &dummy_con;
748#endif
749#endif
750
751 arch_mem_init(cmdline_p);
752
753 resource_init();
754 plat_smp_setup();
755
756 cpu_cache_init();
757}
758
759unsigned long kernelsp[NR_CPUS];
760unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
761
762#ifdef CONFIG_DEBUG_FS
763struct dentry *mips_debugfs_dir;
764static int __init debugfs_mips(void)
765{
766 struct dentry *d;
767
768 d = debugfs_create_dir("mips", NULL);
769 if (!d)
770 return -ENOMEM;
771 mips_debugfs_dir = d;
772 return 0;
773}
774arch_initcall(debugfs_mips);
775#endif