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TOMOYO Linux Cross Reference
Linux/arch/mips/kernel/setup.c

Version: ~ [ linux-5.17-rc1 ] ~ [ linux-5.16.2 ] ~ [ linux-5.15.16 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.93 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.173 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.225 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.262 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.297 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.299 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 38 struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
 39 
 40 EXPORT_SYMBOL(cpu_data);
 41 
 42 #ifdef CONFIG_VT
 43 struct screen_info screen_info;
 44 #endif
 45 
 46 /*
 47  * Despite it's name this variable is even if we don't have PCI
 48  */
 49 unsigned int PCI_DMA_BUS_IS_PHYS;
 50 
 51 EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS);
 52 
 53 /*
 54  * Setup information
 55  *
 56  * These are initialized so they are in the .data section
 57  */
 58 unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
 59 
 60 EXPORT_SYMBOL(mips_machtype);
 61 
 62 struct boot_mem_map boot_mem_map;
 63 
 64 static char __initdata command_line[COMMAND_LINE_SIZE];
 65 char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
 66 
 67 #ifdef CONFIG_CMDLINE_BOOL
 68 static 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  */
 75 const unsigned long mips_io_port_base = -1;
 76 EXPORT_SYMBOL(mips_io_port_base);
 77 
 78 static struct resource code_resource = { .name = "Kernel code", };
 79 static struct resource data_resource = { .name = "Kernel data", };
 80 
 81 static void *detect_magic __initdata = detect_memory_region;
 82 
 83 void __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 
128 void __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 
147 static 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 
182 static 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 }
195 early_param("rd_start", rd_start_early);
196 
197 static int __init rd_size_early(char *p)
198 {
199         initrd_end += memparse(p, &p);
200         return 0;
201 }
202 early_param("rd_size", rd_size_early);
203 
204 /* it returns the next free pfn after initrd */
205 static 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);
239 disable:
240         initrd_start = 0;
241         initrd_end = 0;
242         return 0;
243 }
244 
245 static 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;
264 disable:
265         printk(KERN_CONT " - disabling initrd\n");
266         initrd_start = 0;
267         initrd_end = 0;
268 }
269 
270 #else  /* !CONFIG_BLK_DEV_INITRD */
271 
272 static 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 
287 static void __init bootmem_init(void)
288 {
289         init_initrd();
290         finalize_initrd();
291 }
292 
293 #else  /* !CONFIG_SGI_IP27 */
294 
295 static 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          * Init any data related to initrd. It's a nop if INITRD is
304          * not selected. Once that done we can determine the low bound
305          * of usable memory.
306          */
307         reserved_end = max(init_initrd(),
308                            (unsigned long) PFN_UP(__pa_symbol(&_end)));
309 
310         /*
311          * max_low_pfn is not a number of pages. The number of pages
312          * of the system is given by 'max_low_pfn - min_low_pfn'.
313          */
314         min_low_pfn = ~0UL;
315         max_low_pfn = 0;
316 
317         /*
318          * Find the highest page frame number we have available.
319          */
320         for (i = 0; i < boot_mem_map.nr_map; i++) {
321                 unsigned long start, end;
322 
323                 if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
324                         continue;
325 
326                 start = PFN_UP(boot_mem_map.map[i].addr);
327                 end = PFN_DOWN(boot_mem_map.map[i].addr
328                                 + boot_mem_map.map[i].size);
329 
330                 if (end > max_low_pfn)
331                         max_low_pfn = end;
332                 if (start < min_low_pfn)
333                         min_low_pfn = start;
334                 if (end <= reserved_end)
335                         continue;
336                 if (start >= mapstart)
337                         continue;
338                 mapstart = max(reserved_end, start);
339         }
340 
341         if (min_low_pfn >= max_low_pfn)
342                 panic("Incorrect memory mapping !!!");
343         if (min_low_pfn > ARCH_PFN_OFFSET) {
344                 pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
345                         (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
346                         min_low_pfn - ARCH_PFN_OFFSET);
347         } else if (min_low_pfn < ARCH_PFN_OFFSET) {
348                 pr_info("%lu free pages won't be used\n",
349                         ARCH_PFN_OFFSET - min_low_pfn);
350         }
351         min_low_pfn = ARCH_PFN_OFFSET;
352 
353         /*
354          * Determine low and high memory ranges
355          */
356         max_pfn = max_low_pfn;
357         if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
358 #ifdef CONFIG_HIGHMEM
359                 highstart_pfn = PFN_DOWN(HIGHMEM_START);
360                 highend_pfn = max_low_pfn;
361 #endif
362                 max_low_pfn = PFN_DOWN(HIGHMEM_START);
363         }
364 
365         /*
366          * Initialize the boot-time allocator with low memory only.
367          */
368         bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart,
369                                          min_low_pfn, max_low_pfn);
370 
371 
372         for (i = 0; i < boot_mem_map.nr_map; i++) {
373                 unsigned long start, end;
374 
375                 start = PFN_UP(boot_mem_map.map[i].addr);
376                 end = PFN_DOWN(boot_mem_map.map[i].addr
377                                 + boot_mem_map.map[i].size);
378 
379                 if (start <= min_low_pfn)
380                         start = min_low_pfn;
381                 if (start >= end)
382                         continue;
383 
384 #ifndef CONFIG_HIGHMEM
385                 if (end > max_low_pfn)
386                         end = max_low_pfn;
387 
388                 /*
389                  * ... finally, is the area going away?
390                  */
391                 if (end <= start)
392                         continue;
393 #endif
394 
395                 memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0);
396         }
397 
398         /*
399          * Register fully available low RAM pages with the bootmem allocator.
400          */
401         for (i = 0; i < boot_mem_map.nr_map; i++) {
402                 unsigned long start, end, size;
403 
404                 start = PFN_UP(boot_mem_map.map[i].addr);
405                 end   = PFN_DOWN(boot_mem_map.map[i].addr
406                                     + boot_mem_map.map[i].size);
407 
408                 /*
409                  * Reserve usable memory.
410                  */
411                 switch (boot_mem_map.map[i].type) {
412                 case BOOT_MEM_RAM:
413                         break;
414                 case BOOT_MEM_INIT_RAM:
415                         memory_present(0, start, end);
416                         continue;
417                 default:
418                         /* Not usable memory */
419                         continue;
420                 }
421 
422                 /*
423                  * We are rounding up the start address of usable memory
424                  * and at the end of the usable range downwards.
425                  */
426                 if (start >= max_low_pfn)
427                         continue;
428                 if (start < reserved_end)
429                         start = reserved_end;
430                 if (end > max_low_pfn)
431                         end = max_low_pfn;
432 
433                 /*
434                  * ... finally, is the area going away?
435                  */
436                 if (end <= start)
437                         continue;
438                 size = end - start;
439 
440                 /* Register lowmem ranges */
441                 free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
442                 memory_present(0, start, end);
443         }
444 
445         /*
446          * Reserve the bootmap memory.
447          */
448         reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
449 
450         /*
451          * Reserve initrd memory if needed.
452          */
453         finalize_initrd();
454 }
455 
456 #endif  /* CONFIG_SGI_IP27 */
457 
458 /*
459  * arch_mem_init - initialize memory management subsystem
460  *
461  *  o plat_mem_setup() detects the memory configuration and will record detected
462  *    memory areas using add_memory_region.
463  *
464  * At this stage the memory configuration of the system is known to the
465  * kernel but generic memory management system is still entirely uninitialized.
466  *
467  *  o bootmem_init()
468  *  o sparse_init()
469  *  o paging_init()
470  *
471  * At this stage the bootmem allocator is ready to use.
472  *
473  * NOTE: historically plat_mem_setup did the entire platform initialization.
474  *       This was rather impractical because it meant plat_mem_setup had to
475  * get away without any kind of memory allocator.  To keep old code from
476  * breaking plat_setup was just renamed to plat_setup and a second platform
477  * initialization hook for anything else was introduced.
478  */
479 
480 static int usermem __initdata;
481 
482 static int __init early_parse_mem(char *p)
483 {
484         unsigned long start, size;
485 
486         /*
487          * If a user specifies memory size, we
488          * blow away any automatically generated
489          * size.
490          */
491         if (usermem == 0) {
492                 boot_mem_map.nr_map = 0;
493                 usermem = 1;
494         }
495         start = 0;
496         size = memparse(p, &p);
497         if (*p == '@')
498                 start = memparse(p + 1, &p);
499 
500         add_memory_region(start, size, BOOT_MEM_RAM);
501         return 0;
502 }
503 early_param("mem", early_parse_mem);
504 
505 #ifdef CONFIG_PROC_VMCORE
506 unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
507 static int __init early_parse_elfcorehdr(char *p)
508 {
509         int i;
510 
511         setup_elfcorehdr = memparse(p, &p);
512 
513         for (i = 0; i < boot_mem_map.nr_map; i++) {
514                 unsigned long start = boot_mem_map.map[i].addr;
515                 unsigned long end = (boot_mem_map.map[i].addr +
516                                      boot_mem_map.map[i].size);
517                 if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
518                         /*
519                          * Reserve from the elf core header to the end of
520                          * the memory segment, that should all be kdump
521                          * reserved memory.
522                          */
523                         setup_elfcorehdr_size = end - setup_elfcorehdr;
524                         break;
525                 }
526         }
527         /*
528          * If we don't find it in the memory map, then we shouldn't
529          * have to worry about it, as the new kernel won't use it.
530          */
531         return 0;
532 }
533 early_param("elfcorehdr", early_parse_elfcorehdr);
534 #endif
535 
536 static void __init arch_mem_addpart(phys_t mem, phys_t end, int type)
537 {
538         phys_t size;
539         int i;
540 
541         size = end - mem;
542         if (!size)
543                 return;
544 
545         /* Make sure it is in the boot_mem_map */
546         for (i = 0; i < boot_mem_map.nr_map; i++) {
547                 if (mem >= boot_mem_map.map[i].addr &&
548                     mem < (boot_mem_map.map[i].addr +
549                            boot_mem_map.map[i].size))
550                         return;
551         }
552         add_memory_region(mem, size, type);
553 }
554 
555 #ifdef CONFIG_KEXEC
556 static inline unsigned long long get_total_mem(void)
557 {
558         unsigned long long total;
559 
560         total = max_pfn - min_low_pfn;
561         return total << PAGE_SHIFT;
562 }
563 
564 static void __init mips_parse_crashkernel(void)
565 {
566         unsigned long long total_mem;
567         unsigned long long crash_size, crash_base;
568         int ret;
569 
570         total_mem = get_total_mem();
571         ret = parse_crashkernel(boot_command_line, total_mem,
572                                 &crash_size, &crash_base);
573         if (ret != 0 || crash_size <= 0)
574                 return;
575 
576         crashk_res.start = crash_base;
577         crashk_res.end   = crash_base + crash_size - 1;
578 }
579 
580 static void __init request_crashkernel(struct resource *res)
581 {
582         int ret;
583 
584         ret = request_resource(res, &crashk_res);
585         if (!ret)
586                 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
587                         (unsigned long)((crashk_res.end -
588                                          crashk_res.start + 1) >> 20),
589                         (unsigned long)(crashk_res.start  >> 20));
590 }
591 #else /* !defined(CONFIG_KEXEC)         */
592 static void __init mips_parse_crashkernel(void)
593 {
594 }
595 
596 static void __init request_crashkernel(struct resource *res)
597 {
598 }
599 #endif /* !defined(CONFIG_KEXEC)  */
600 
601 static void __init arch_mem_init(char **cmdline_p)
602 {
603         extern void plat_mem_setup(void);
604 
605         /* call board setup routine */
606         plat_mem_setup();
607 
608         /*
609          * Make sure all kernel memory is in the maps.  The "UP" and
610          * "DOWN" are opposite for initdata since if it crosses over
611          * into another memory section you don't want that to be
612          * freed when the initdata is freed.
613          */
614         arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
615                          PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
616                          BOOT_MEM_RAM);
617         arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
618                          PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
619                          BOOT_MEM_INIT_RAM);
620 
621         pr_info("Determined physical RAM map:\n");
622         print_memory_map();
623 
624 #ifdef CONFIG_CMDLINE_BOOL
625 #ifdef CONFIG_CMDLINE_OVERRIDE
626         strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
627 #else
628         if (builtin_cmdline[0]) {
629                 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
630                 strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE);
631         }
632         strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
633 #endif
634 #else
635         strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
636 #endif
637         strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
638 
639         *cmdline_p = command_line;
640 
641         parse_early_param();
642 
643         if (usermem) {
644                 pr_info("User-defined physical RAM map:\n");
645                 print_memory_map();
646         }
647 
648         bootmem_init();
649 #ifdef CONFIG_PROC_VMCORE
650         if (setup_elfcorehdr && setup_elfcorehdr_size) {
651                 printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
652                        setup_elfcorehdr, setup_elfcorehdr_size);
653                 reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
654                                 BOOTMEM_DEFAULT);
655         }
656 #endif
657 
658         mips_parse_crashkernel();
659 #ifdef CONFIG_KEXEC
660         if (crashk_res.start != crashk_res.end)
661                 reserve_bootmem(crashk_res.start,
662                                 crashk_res.end - crashk_res.start + 1,
663                                 BOOTMEM_DEFAULT);
664 #endif
665         device_tree_init();
666         sparse_init();
667         plat_swiotlb_setup();
668         paging_init();
669 }
670 
671 static void __init resource_init(void)
672 {
673         int i;
674 
675         if (UNCAC_BASE != IO_BASE)
676                 return;
677 
678         code_resource.start = __pa_symbol(&_text);
679         code_resource.end = __pa_symbol(&_etext) - 1;
680         data_resource.start = __pa_symbol(&_etext);
681         data_resource.end = __pa_symbol(&_edata) - 1;
682 
683         for (i = 0; i < boot_mem_map.nr_map; i++) {
684                 struct resource *res;
685                 unsigned long start, end;
686 
687                 start = boot_mem_map.map[i].addr;
688                 end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
689                 if (start >= HIGHMEM_START)
690                         continue;
691                 if (end >= HIGHMEM_START)
692                         end = HIGHMEM_START - 1;
693 
694                 res = alloc_bootmem(sizeof(struct resource));
695                 switch (boot_mem_map.map[i].type) {
696                 case BOOT_MEM_RAM:
697                 case BOOT_MEM_INIT_RAM:
698                 case BOOT_MEM_ROM_DATA:
699                         res->name = "System RAM";
700                         break;
701                 case BOOT_MEM_RESERVED:
702                 default:
703                         res->name = "reserved";
704                 }
705 
706                 res->start = start;
707                 res->end = end;
708 
709                 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
710                 request_resource(&iomem_resource, res);
711 
712                 /*
713                  *  We don't know which RAM region contains kernel data,
714                  *  so we try it repeatedly and let the resource manager
715                  *  test it.
716                  */
717                 request_resource(res, &code_resource);
718                 request_resource(res, &data_resource);
719                 request_crashkernel(res);
720         }
721 }
722 
723 void __init setup_arch(char **cmdline_p)
724 {
725         cpu_probe();
726         prom_init();
727 
728 #ifdef CONFIG_EARLY_PRINTK
729         setup_early_printk();
730 #endif
731         cpu_report();
732         check_bugs_early();
733 
734 #if defined(CONFIG_VT)
735 #if defined(CONFIG_VGA_CONSOLE)
736         conswitchp = &vga_con;
737 #elif defined(CONFIG_DUMMY_CONSOLE)
738         conswitchp = &dummy_con;
739 #endif
740 #endif
741 
742         arch_mem_init(cmdline_p);
743 
744         resource_init();
745         plat_smp_setup();
746 
747         cpu_cache_init();
748 }
749 
750 unsigned long kernelsp[NR_CPUS];
751 unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
752 
753 #ifdef CONFIG_DEBUG_FS
754 struct dentry *mips_debugfs_dir;
755 static int __init debugfs_mips(void)
756 {
757         struct dentry *d;
758 
759         d = debugfs_create_dir("mips", NULL);
760         if (!d)
761                 return -ENOMEM;
762         mips_debugfs_dir = d;
763         return 0;
764 }
765 arch_initcall(debugfs_mips);
766 #endif
767 

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