text: /*
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 1995 Linus Torvalds
   * Copyright (C) 1995 Waldorf Electronics
   * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03  Ralf Baechle
   * Copyright (C) 1996 Stoned Elipot
   * Copyright (C) 1999 Silicon Graphics, Inc.
   * Copyright (C) 2000, 2001, 2002, 2007	 Maciej W. Rozycki
   */
  #include <linux/init.h>
  #include <linux/ioport.h>
  #include <linux/export.h>
  #include <linux/screen_info.h>
  #include <linux/memblock.h>
  #include <linux/bootmem.h>
  #include <linux/initrd.h>
  #include <linux/root_dev.h>
  #include <linux/highmem.h>
  #include <linux/console.h>
  #include <linux/pfn.h>
  #include <linux/debugfs.h>
  #include <linux/kexec.h>
  #include <linux/sizes.h>
  #include <linux/device.h>
  #include <linux/dma-contiguous.h>
  
  #include <asm/addrspace.h>
  #include <asm/bootinfo.h>
  #include <asm/bugs.h>
  #include <asm/cache.h>
  #include <asm/cdmm.h>
  #include <asm/cpu.h>
  #include <asm/debug.h>
  #include <asm/sections.h>
  #include <asm/setup.h>
  #include <asm/smp-ops.h>
  #include <asm/prom.h>
  
  #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
  const char __section(.appended_dtb) __appended_dtb[0x100000];
  #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
  
  struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
  
  EXPORT_SYMBOL(cpu_data);
  
  #ifdef CONFIG_VT
  struct screen_info screen_info;
  #endif
  
  /*
   * Despite it's name this variable is even if we don't have PCI
   */
  unsigned int PCI_DMA_BUS_IS_PHYS;
  
  EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS);
  
  /*
   * Setup information
   *
   * These are initialized so they are in the .data section
   */
  unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
  
  EXPORT_SYMBOL(mips_machtype);
  
  struct boot_mem_map boot_mem_map;
  
  static char __initdata command_line[COMMAND_LINE_SIZE];
  char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
  
  #ifdef CONFIG_CMDLINE_BOOL
  static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
  #endif
  
  /*
   * mips_io_port_base is the begin of the address space to which x86 style
   * I/O ports are mapped.
   */
  const unsigned long mips_io_port_base = -1;
  EXPORT_SYMBOL(mips_io_port_base);
  
  static struct resource code_resource = { .name = "Kernel code", };
  static struct resource data_resource = { .name = "Kernel data", };
  
  static void *detect_magic __initdata = detect_memory_region;
  
  void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
  {
  	int x = boot_mem_map.nr_map;
  	int i;
  
  	/* Sanity check */
  	if (start + size < start) {
  		pr_warn("Trying to add an invalid memory region, skipped\n");
  		return;
  	}
  
  	/*
  	 * Try to merge with existing entry, if any.
  	 */
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		struct boot_mem_map_entry *entry = boot_mem_map.map + i;
  		unsigned long top;
  
  		if (entry->type != type)
  			continue;
  
  		if (start + size < entry->addr)
  			continue;			/* no overlap */
  
  		if (entry->addr + entry->size < start)
  			continue;			/* no overlap */
  
  		top = max(entry->addr + entry->size, start + size);
  		entry->addr = min(entry->addr, start);
  		entry->size = top - entry->addr;
  
  		return;
  	}
  
  	if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) {
  		pr_err("Ooops! Too many entries in the memory map!\n");
  		return;
  	}
  
  	boot_mem_map.map[x].addr = start;
  	boot_mem_map.map[x].size = size;
  	boot_mem_map.map[x].type = type;
  	boot_mem_map.nr_map++;
  }
  
  void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
  {
  	void *dm = &detect_magic;
  	phys_addr_t size;
  
  	for (size = sz_min; size < sz_max; size <<= 1) {
  		if (!memcmp(dm, dm + size, sizeof(detect_magic)))
  			break;
  	}
  
  	pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
  		((unsigned long long) size) / SZ_1M,
  		(unsigned long long) start,
  		((unsigned long long) sz_min) / SZ_1M,
  		((unsigned long long) sz_max) / SZ_1M);
  
  	add_memory_region(start, size, BOOT_MEM_RAM);
  }
  
  static void __init print_memory_map(void)
  {
  	int i;
  	const int field = 2 * sizeof(unsigned long);
  
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		printk(KERN_INFO " memory: %0*Lx @ %0*Lx ",
  		       field, (unsigned long long) boot_mem_map.map[i].size,
  		       field, (unsigned long long) boot_mem_map.map[i].addr);
  
  		switch (boot_mem_map.map[i].type) {
  		case BOOT_MEM_RAM:
  			printk(KERN_CONT "(usable)\n");
  			break;
  		case BOOT_MEM_INIT_RAM:
  			printk(KERN_CONT "(usable after init)\n");
  			break;
  		case BOOT_MEM_ROM_DATA:
  			printk(KERN_CONT "(ROM data)\n");
  			break;
  		case BOOT_MEM_RESERVED:
  			printk(KERN_CONT "(reserved)\n");
  			break;
  		default:
  			printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type);
  			break;
  		}
  	}
  }
  
  /*
   * Manage initrd
   */
  #ifdef CONFIG_BLK_DEV_INITRD
  
  static int __init rd_start_early(char *p)
  {
  	unsigned long start = memparse(p, &p);
  
  #ifdef CONFIG_64BIT
  	/* Guess if the sign extension was forgotten by bootloader */
  	if (start < XKPHYS)
  		start = (int)start;
  #endif
  	initrd_start = start;
  	initrd_end += start;
  	return 0;
  }
  early_param("rd_start", rd_start_early);
  
  static int __init rd_size_early(char *p)
  {
  	initrd_end += memparse(p, &p);
  	return 0;
  }
  early_param("rd_size", rd_size_early);
  
  /* it returns the next free pfn after initrd */
  static unsigned long __init init_initrd(void)
  {
  	unsigned long end;
  
  	/*
  	 * Board specific code or command line parser should have
  	 * already set up initrd_start and initrd_end. In these cases
  	 * perfom sanity checks and use them if all looks good.
  	 */
  	if (!initrd_start || initrd_end <= initrd_start)
  		goto disable;
  
  	if (initrd_start & ~PAGE_MASK) {
  		pr_err("initrd start must be page aligned\n");
  		goto disable;
  	}
  	if (initrd_start < PAGE_OFFSET) {
  		pr_err("initrd start < PAGE_OFFSET\n");
  		goto disable;
  	}
  
  	/*
  	 * Sanitize initrd addresses. For example firmware
  	 * can't guess if they need to pass them through
  	 * 64-bits values if the kernel has been built in pure
  	 * 32-bit. We need also to switch from KSEG0 to XKPHYS
  	 * addresses now, so the code can now safely use __pa().
  	 */
  	end = __pa(initrd_end);
  	initrd_end = (unsigned long)__va(end);
  	initrd_start = (unsigned long)__va(__pa(initrd_start));
  
  	ROOT_DEV = Root_RAM0;
  	return PFN_UP(end);
  disable:
  	initrd_start = 0;
  	initrd_end = 0;
  	return 0;
  }
  
  static void __init finalize_initrd(void)
  {
  	unsigned long size = initrd_end - initrd_start;
  
  	if (size == 0) {
  		printk(KERN_INFO "Initrd not found or empty");
  		goto disable;
  	}
  	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
  		printk(KERN_ERR "Initrd extends beyond end of memory");
  		goto disable;
  	}
  
  	reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
  	initrd_below_start_ok = 1;
  
  	pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
  		initrd_start, size);
  	return;
  disable:
  	printk(KERN_CONT " - disabling initrd\n");
  	initrd_start = 0;
  	initrd_end = 0;
  }
  
  #else  /* !CONFIG_BLK_DEV_INITRD */
  
  static unsigned long __init init_initrd(void)
  {
  	return 0;
  }
  
  #define finalize_initrd()	do {} while (0)
  
  #endif
  
  /*
   * Initialize the bootmem allocator. It also setup initrd related data
   * if needed.
   */
  #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA))
  
  static void __init bootmem_init(void)
  {
  	init_initrd();
  	finalize_initrd();
  }
  
  #else  /* !CONFIG_SGI_IP27 */
  
  static void __init bootmem_init(void)
  {
  	unsigned long reserved_end;
  	unsigned long mapstart = ~0UL;
  	unsigned long bootmap_size;
  	int i;
  
  	/*
  	 * Sanity check any INITRD first. We don't take it into account
  	 * for bootmem setup initially, rely on the end-of-kernel-code
  	 * as our memory range starting point. Once bootmem is inited we
  	 * will reserve the area used for the initrd.
  	 */
  	init_initrd();
  	reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
  
  	/*
  	 * max_low_pfn is not a number of pages. The number of pages
  	 * of the system is given by 'max_low_pfn - min_low_pfn'.
  	 */
  	min_low_pfn = ~0UL;
  	max_low_pfn = 0;
  
  	/*
  	 * Find the highest page frame number we have available.
  	 */
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		unsigned long start, end;
  
  		if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
  			continue;
  
  		start = PFN_UP(boot_mem_map.map[i].addr);
  		end = PFN_DOWN(boot_mem_map.map[i].addr
  				+ boot_mem_map.map[i].size);
  
  		if (end > max_low_pfn)
  			max_low_pfn = end;
  		if (start < min_low_pfn)
  			min_low_pfn = start;
  		if (end <= reserved_end)
  			continue;
  #ifdef CONFIG_BLK_DEV_INITRD
  		/* Skip zones before initrd and initrd itself */
  		if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end)))
  			continue;
  #endif
  		if (start >= mapstart)
  			continue;
  		mapstart = max(reserved_end, start);
  	}
  
  	if (min_low_pfn >= max_low_pfn)
  		panic("Incorrect memory mapping !!!");
  	if (min_low_pfn > ARCH_PFN_OFFSET) {
  		pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
  			(min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
  			min_low_pfn - ARCH_PFN_OFFSET);
  	} else if (min_low_pfn < ARCH_PFN_OFFSET) {
  		pr_info("%lu free pages won't be used\n",
  			ARCH_PFN_OFFSET - min_low_pfn);
  	}
  	min_low_pfn = ARCH_PFN_OFFSET;
  
  	/*
  	 * Determine low and high memory ranges
  	 */
  	max_pfn = max_low_pfn;
  	if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
  #ifdef CONFIG_HIGHMEM
  		highstart_pfn = PFN_DOWN(HIGHMEM_START);
  		highend_pfn = max_low_pfn;
  #endif
  		max_low_pfn = PFN_DOWN(HIGHMEM_START);
  	}
  
  #ifdef CONFIG_BLK_DEV_INITRD
  	/*
  	 * mapstart should be after initrd_end
  	 */
  	if (initrd_end)
  		mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end)));
  #endif
  
  	/*
  	 * Initialize the boot-time allocator with low memory only.
  	 */
  	bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart,
  					 min_low_pfn, max_low_pfn);
  
  
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		unsigned long start, end;
  
  		start = PFN_UP(boot_mem_map.map[i].addr);
  		end = PFN_DOWN(boot_mem_map.map[i].addr
  				+ boot_mem_map.map[i].size);
  
  		if (start <= min_low_pfn)
  			start = min_low_pfn;
  		if (start >= end)
  			continue;
  
  #ifndef CONFIG_HIGHMEM
  		if (end > max_low_pfn)
  			end = max_low_pfn;
  
  		/*
  		 * ... finally, is the area going away?
  		 */
  		if (end <= start)
  			continue;
  #endif
  
  		memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0);
  	}
  
  	/*
  	 * Register fully available low RAM pages with the bootmem allocator.
  	 */
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		unsigned long start, end, size;
  
  		start = PFN_UP(boot_mem_map.map[i].addr);
  		end   = PFN_DOWN(boot_mem_map.map[i].addr
  				    + boot_mem_map.map[i].size);
  
  		/*
  		 * Reserve usable memory.
  		 */
  		switch (boot_mem_map.map[i].type) {
  		case BOOT_MEM_RAM:
  			break;
  		case BOOT_MEM_INIT_RAM:
  			memory_present(0, start, end);
  			continue;
  		default:
  			/* Not usable memory */
  			continue;
  		}
  
  		/*
  		 * We are rounding up the start address of usable memory
  		 * and at the end of the usable range downwards.
  		 */
  		if (start >= max_low_pfn)
  			continue;
  		if (start < reserved_end)
  			start = reserved_end;
  		if (end > max_low_pfn)
  			end = max_low_pfn;
  
  		/*
  		 * ... finally, is the area going away?
  		 */
  		if (end <= start)
  			continue;
  		size = end - start;
  
  		/* Register lowmem ranges */
  		free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
  		memory_present(0, start, end);
  	}
  
  	/*
  	 * Reserve the bootmap memory.
  	 */
  	reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
  
  	/*
  	 * Reserve initrd memory if needed.
  	 */
  	finalize_initrd();
  }
  
  #endif	/* CONFIG_SGI_IP27 */
  
  /*
   * arch_mem_init - initialize memory management subsystem
   *
   *  o plat_mem_setup() detects the memory configuration and will record detected
   *    memory areas using add_memory_region.
   *
   * At this stage the memory configuration of the system is known to the
   * kernel but generic memory management system is still entirely uninitialized.
   *
   *  o bootmem_init()
   *  o sparse_init()
   *  o paging_init()
   *  o dma_contiguous_reserve()
   *
   * At this stage the bootmem allocator is ready to use.
   *
   * NOTE: historically plat_mem_setup did the entire platform initialization.
   *	 This was rather impractical because it meant plat_mem_setup had to
   * get away without any kind of memory allocator.  To keep old code from
   * breaking plat_setup was just renamed to plat_mem_setup and a second platform
   * initialization hook for anything else was introduced.
   */
  
  static int usermem __initdata;
  
  static int __init early_parse_mem(char *p)
  {
  	phys_addr_t start, size;
  
  	/*
  	 * If a user specifies memory size, we
  	 * blow away any automatically generated
  	 * size.
  	 */
  	if (usermem == 0) {
  		boot_mem_map.nr_map = 0;
  		usermem = 1;
  	}
  	start = 0;
  	size = memparse(p, &p);
  	if (*p == '@')
  		start = memparse(p + 1, &p);
  
  	add_memory_region(start, size, BOOT_MEM_RAM);
  	return 0;
  }
  early_param("mem", early_parse_mem);
  
  #ifdef CONFIG_PROC_VMCORE
  unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
  static int __init early_parse_elfcorehdr(char *p)
  {
  	int i;
  
  	setup_elfcorehdr = memparse(p, &p);
  
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		unsigned long start = boot_mem_map.map[i].addr;
  		unsigned long end = (boot_mem_map.map[i].addr +
  				     boot_mem_map.map[i].size);
  		if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
  			/*
  			 * Reserve from the elf core header to the end of
  			 * the memory segment, that should all be kdump
  			 * reserved memory.
  			 */
  			setup_elfcorehdr_size = end - setup_elfcorehdr;
  			break;
  		}
  	}
  	/*
  	 * If we don't find it in the memory map, then we shouldn't
  	 * have to worry about it, as the new kernel won't use it.
  	 */
  	return 0;
  }
  early_param("elfcorehdr", early_parse_elfcorehdr);
  #endif
  
  static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type)
  {
  	phys_addr_t size;
  	int i;
  
  	size = end - mem;
  	if (!size)
  		return;
  
  	/* Make sure it is in the boot_mem_map */
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		if (mem >= boot_mem_map.map[i].addr &&
  		    mem < (boot_mem_map.map[i].addr +
  			   boot_mem_map.map[i].size))
  			return;
  	}
  	add_memory_region(mem, size, type);
  }
  
  #ifdef CONFIG_KEXEC
  static inline unsigned long long get_total_mem(void)
  {
  	unsigned long long total;
  
  	total = max_pfn - min_low_pfn;
  	return total << PAGE_SHIFT;
  }
  
  static void __init mips_parse_crashkernel(void)
  {
  	unsigned long long total_mem;
  	unsigned long long crash_size, crash_base;
  	int ret;
  
  	total_mem = get_total_mem();
  	ret = parse_crashkernel(boot_command_line, total_mem,
  				&crash_size, &crash_base);
  	if (ret != 0 || crash_size <= 0)
  		return;
  
  	crashk_res.start = crash_base;
  	crashk_res.end	 = crash_base + crash_size - 1;
  }
  
  static void __init request_crashkernel(struct resource *res)
  {
  	int ret;
  
  	ret = request_resource(res, &crashk_res);
  	if (!ret)
  		pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
  			(unsigned long)((crashk_res.end -
  					 crashk_res.start + 1) >> 20),
  			(unsigned long)(crashk_res.start  >> 20));
  }
  #else /* !defined(CONFIG_KEXEC)		*/
  static void __init mips_parse_crashkernel(void)
  {
  }
  
  static void __init request_crashkernel(struct resource *res)
  {
  }
  #endif /* !defined(CONFIG_KEXEC)  */
  
  #define USE_PROM_CMDLINE	IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER)
  #define USE_DTB_CMDLINE		IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB)
  #define EXTEND_WITH_PROM	IS_ENABLED(CONFIG_MIPS_CMDLINE_EXTEND)
  
  static void __init arch_mem_init(char **cmdline_p)
  {
  	struct memblock_region *reg;
  	extern void plat_mem_setup(void);
  
  	/* call board setup routine */
  	plat_mem_setup();
  
  	/*
  	 * Make sure all kernel memory is in the maps.  The "UP" and
  	 * "DOWN" are opposite for initdata since if it crosses over
  	 * into another memory section you don't want that to be
  	 * freed when the initdata is freed.
  	 */
  	arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
  			 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
  			 BOOT_MEM_RAM);
  	arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
  			 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
  			 BOOT_MEM_INIT_RAM);
  
  	pr_info("Determined physical RAM map:\n");
  	print_memory_map();
  
  #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
  	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
  #else
  	if ((USE_PROM_CMDLINE && arcs_cmdline[0]) ||
  	    (USE_DTB_CMDLINE && !boot_command_line[0]))
  		strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
  
  	if (EXTEND_WITH_PROM && arcs_cmdline[0]) {
  		strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
  		strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
  	}
  
  #if defined(CONFIG_CMDLINE_BOOL)
  	if (builtin_cmdline[0]) {
  		strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
  		strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
  	}
  #endif
  #endif
  	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
  
  	*cmdline_p = command_line;
  
  	parse_early_param();
  
  	if (usermem) {
  		pr_info("User-defined physical RAM map:\n");
  		print_memory_map();
  	}
  
  	bootmem_init();
  #ifdef CONFIG_PROC_VMCORE
  	if (setup_elfcorehdr && setup_elfcorehdr_size) {
  		printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
  		       setup_elfcorehdr, setup_elfcorehdr_size);
  		reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
  				BOOTMEM_DEFAULT);
  	}
  #endif
  
  	mips_parse_crashkernel();
  #ifdef CONFIG_KEXEC
  	if (crashk_res.start != crashk_res.end)
  		reserve_bootmem(crashk_res.start,
  				crashk_res.end - crashk_res.start + 1,
  				BOOTMEM_DEFAULT);
  #endif
  	device_tree_init();
  	sparse_init();
  	plat_swiotlb_setup();
  	paging_init();
  
  	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
  	/* Tell bootmem about cma reserved memblock section */
  	for_each_memblock(reserved, reg)
  		if (reg->size != 0)
  			reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
  }
  
  static void __init resource_init(void)
  {
  	int i;
  
  	if (UNCAC_BASE != IO_BASE)
  		return;
  
  	code_resource.start = __pa_symbol(&_text);
  	code_resource.end = __pa_symbol(&_etext) - 1;
  	data_resource.start = __pa_symbol(&_etext);
  	data_resource.end = __pa_symbol(&_edata) - 1;
  
  	for (i = 0; i < boot_mem_map.nr_map; i++) {
  		struct resource *res;
  		unsigned long start, end;
  
  		start = boot_mem_map.map[i].addr;
  		end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
  		if (start >= HIGHMEM_START)
  			continue;
  		if (end >= HIGHMEM_START)
  			end = HIGHMEM_START - 1;
  
  		res = alloc_bootmem(sizeof(struct resource));
  		switch (boot_mem_map.map[i].type) {
  		case BOOT_MEM_RAM:
  		case BOOT_MEM_INIT_RAM:
  		case BOOT_MEM_ROM_DATA:
  			res->name = "System RAM";
  			break;
  		case BOOT_MEM_RESERVED:
  		default:
  			res->name = "reserved";
  		}
  
  		res->start = start;
  		res->end = end;
  
  		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
  		request_resource(&iomem_resource, res);
  
  		/*
  		 *  We don't know which RAM region contains kernel data,
  		 *  so we try it repeatedly and let the resource manager
  		 *  test it.
  		 */
  		request_resource(res, &code_resource);
  		request_resource(res, &data_resource);
  		request_crashkernel(res);
  	}
  }
  
  #ifdef CONFIG_SMP
  static void __init prefill_possible_map(void)
  {
  	int i, possible = num_possible_cpus();
  
  	if (possible > nr_cpu_ids)
  		possible = nr_cpu_ids;
  
  	for (i = 0; i < possible; i++)
  		set_cpu_possible(i, true);
  	for (; i < NR_CPUS; i++)
  		set_cpu_possible(i, false);
  
  	nr_cpu_ids = possible;
  }
  #else
  static inline void prefill_possible_map(void) {}
  #endif
  
  void __init setup_arch(char **cmdline_p)
  {
  	cpu_probe();
  	prom_init();
  
  	setup_early_fdc_console();
  #ifdef CONFIG_EARLY_PRINTK
  	setup_early_printk();
  #endif
  	cpu_report();
  	check_bugs_early();
  
  #if defined(CONFIG_VT)
  #if defined(CONFIG_VGA_CONSOLE)
  	conswitchp = &vga_con;
  #elif defined(CONFIG_DUMMY_CONSOLE)
  	conswitchp = &dummy_con;
  #endif
  #endif
  
  	arch_mem_init(cmdline_p);
  
  	resource_init();
  	plat_smp_setup();
  	prefill_possible_map();
  
  	cpu_cache_init();
  }
  
  unsigned long kernelsp[NR_CPUS];
  unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
  
  #ifdef CONFIG_DEBUG_FS
  struct dentry *mips_debugfs_dir;
  static int __init debugfs_mips(void)
  {
  	struct dentry *d;
  
  	d = debugfs_create_dir("mips", NULL);
  	if (!d)
  		return -ENOMEM;
  	mips_debugfs_dir = d;
  	return 0;
  }
  arch_initcall(debugfs_mips);
  #endif
  