arch/sh/kernel/setup.c - maze/linux - Git at Google

 /*
  * arch/sh/kernel/setup.c
  *
  * This file handles the architecture-dependent parts of initialization
  *
  *  Copyright (C) 1999  Niibe Yutaka
  *  Copyright (C) 2002 - 2007 Paul Mundt
  */
 #include <linux/screen_info.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/initrd.h>
 #include <linux/bootmem.h>
 #include <linux/console.h>
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
 #include <linux/utsname.h>
 #include <linux/nodemask.h>
 #include <linux/cpu.h>
 #include <linux/pfn.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/kexec.h>
 #include <linux/module.h>
 #include <linux/smp.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/page.h>
 #include <asm/elf.h>
 #include <asm/sections.h>
 #include <asm/irq.h>
 #include <asm/setup.h>
 #include <asm/clock.h>
 #include <asm/mmu_context.h>

 /*
  * Initialize loops_per_jiffy as 10000000 (1000MIPS).
  * This value will be used at the very early stage of serial setup.
  * The bigger value means no problem.
  */
 struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
 	[0] = {
 		.type			= CPU_SH_NONE,
 		.loops_per_jiffy	= 10000000,
 	},
 };
 EXPORT_SYMBOL(cpu_data);

 /*
  * The machine vector. First entry in .machvec.init, or clobbered by
  * sh_mv= on the command line, prior to .machvec.init teardown.
  */
 struct sh_machine_vector sh_mv = { .mv_name = "generic", };

 #ifdef CONFIG_VT
 struct screen_info screen_info;
 #endif

 extern int root_mountflags;

 #define RAMDISK_IMAGE_START_MASK	0x07FF
 #define RAMDISK_PROMPT_FLAG		0x8000
 #define RAMDISK_LOAD_FLAG		0x4000

 static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };

 static struct resource code_resource = {
 	.name = "Kernel code",
 	.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
 };

 static struct resource data_resource = {
 	.name = "Kernel data",
 	.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
 };

 unsigned long memory_start;
 EXPORT_SYMBOL(memory_start);
 unsigned long memory_end = 0;
 EXPORT_SYMBOL(memory_end);

 int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;

 static int __init early_parse_mem(char *p)
 {
 	unsigned long size;

 	memory_start = (unsigned long)__va(__MEMORY_START);
 	size = memparse(p, &p);

 	if (size > __MEMORY_SIZE) {
 		static char msg[] __initdata = KERN_ERR
 			"Using mem= to increase the size of kernel memory "
 			"is not allowed.\n"
 			"  Recompile the kernel with the correct value for "
 			"CONFIG_MEMORY_SIZE.\n";
 		printk(msg);
 		return 0;
 	}

 	memory_end = memory_start + size;

 	return 0;
 }
 early_param("mem", early_parse_mem);

 /*
  * Register fully available low RAM pages with the bootmem allocator.
  */
 static void __init register_bootmem_low_pages(void)
 {
 	unsigned long curr_pfn, last_pfn, pages;

 	/*
 	 * We are rounding up the start address of usable memory:
 	 */
 	curr_pfn = PFN_UP(__MEMORY_START);

 	/*
 	 * ... and at the end of the usable range downwards:
 	 */
 	last_pfn = PFN_DOWN(__pa(memory_end));

 	if (last_pfn > max_low_pfn)
 		last_pfn = max_low_pfn;

 	pages = last_pfn - curr_pfn;
 	free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
 }

 #ifdef CONFIG_KEXEC
 static void __init reserve_crashkernel(void)
 {
 	unsigned long long free_mem;
 	unsigned long long crash_size, crash_base;
 	int ret;

 	free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;

 	ret = parse_crashkernel(boot_command_line, free_mem,
 			&crash_size, &crash_base);
 	if (ret == 0 && crash_size) {
 		if (crash_base > 0) {
 			printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
 					"for crashkernel (System RAM: %ldMB)\n",
 					(unsigned long)(crash_size >> 20),
 					(unsigned long)(crash_base >> 20),
 					(unsigned long)(free_mem >> 20));
 			crashk_res.start = crash_base;
 			crashk_res.end   = crash_base + crash_size - 1;
 			reserve_bootmem(crash_base, crash_size);
 		} else
 			printk(KERN_INFO "crashkernel reservation failed - "
 					"you have to specify a base address\n");
 	}
 }
 #else
 static inline void __init reserve_crashkernel(void)
 {}
 #endif

 void __init setup_bootmem_allocator(unsigned long free_pfn)
 {
 	unsigned long bootmap_size;

 	/*
 	 * Find a proper area for the bootmem bitmap. After this
 	 * bootstrap step all allocations (until the page allocator
 	 * is intact) must be done via bootmem_alloc().
 	 */
 	bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
 					 min_low_pfn, max_low_pfn);

 	add_active_range(0, min_low_pfn, max_low_pfn);
 	register_bootmem_low_pages();

 	node_set_online(0);

 	/*
 	 * Reserve the kernel text and
 	 * Reserve the bootmem bitmap. We do this in two steps (first step
 	 * was init_bootmem()), because this catches the (definitely buggy)
 	 * case of us accidentally initializing the bootmem allocator with
 	 * an invalid RAM area.
 	 */
 	reserve_bootmem(__MEMORY_START+PAGE_SIZE,
 		(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);

 	/*
 	 * reserve physical page 0 - it's a special BIOS page on many boxes,
 	 * enabling clean reboots, SMP operation, laptop functions.
 	 */
 	reserve_bootmem(__MEMORY_START, PAGE_SIZE);

 	sparse_memory_present_with_active_regions(0);

 #ifdef CONFIG_BLK_DEV_INITRD
 	ROOT_DEV = Root_RAM0;

 	if (LOADER_TYPE && INITRD_START) {
 		if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
 			reserve_bootmem(INITRD_START + __MEMORY_START,
 					INITRD_SIZE);
 			initrd_start = INITRD_START + PAGE_OFFSET +
 					__MEMORY_START;
 			initrd_end = initrd_start + INITRD_SIZE;
 		} else {
 			printk("initrd extends beyond end of memory "
 			    "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 				    INITRD_START + INITRD_SIZE,
 				    max_low_pfn << PAGE_SHIFT);
 			initrd_start = 0;
 		}
 	}
 #endif

 	reserve_crashkernel();
 }

 #ifndef CONFIG_NEED_MULTIPLE_NODES
 static void __init setup_memory(void)
 {
 	unsigned long start_pfn;

 	/*
 	 * Partially used pages are not usable - thus
 	 * we are rounding upwards:
 	 */
 	start_pfn = PFN_UP(__pa(_end));
 	setup_bootmem_allocator(start_pfn);
 }
 #else
 extern void __init setup_memory(void);
 #endif

 void __init setup_arch(char **cmdline_p)
 {
 	enable_mmu();

 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);

 #ifdef CONFIG_BLK_DEV_RAM
 	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
 	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 #endif

 	if (!MOUNT_ROOT_RDONLY)
 		root_mountflags &= ~MS_RDONLY;
 	init_mm.start_code = (unsigned long) _text;
 	init_mm.end_code = (unsigned long) _etext;
 	init_mm.end_data = (unsigned long) _edata;
 	init_mm.brk = (unsigned long) _end;

 	code_resource.start = virt_to_phys(_text);
 	code_resource.end = virt_to_phys(_etext)-1;
 	data_resource.start = virt_to_phys(_etext);
 	data_resource.end = virt_to_phys(_edata)-1;

 	memory_start = (unsigned long)__va(__MEMORY_START);
 	if (!memory_end)
 		memory_end = memory_start + __MEMORY_SIZE;

 #ifdef CONFIG_CMDLINE_BOOL
 	strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
 #else
 	strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
 #endif

 	/* Save unparsed command line copy for /proc/cmdline */
 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;

 	parse_early_param();

 	sh_mv_setup();

 	/*
 	 * Find the highest page frame number we have available
 	 */
 	max_pfn = PFN_DOWN(__pa(memory_end));

 	/*
 	 * Determine low and high memory ranges:
 	 */
 	max_low_pfn = max_pfn;
 	min_low_pfn = __MEMORY_START >> PAGE_SHIFT;

 	nodes_clear(node_online_map);

 	/* Setup bootmem with available RAM */
 	setup_memory();
 	sparse_init();

 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif

 	/* Perform the machine specific initialisation */
 	if (likely(sh_mv.mv_setup))
 		sh_mv.mv_setup(cmdline_p);

 	paging_init();

 #ifdef CONFIG_SMP
 	plat_smp_setup();
 #endif
 }

 static const char *cpu_name[] = {
 	[CPU_SH7203]	= "SH7203",	[CPU_SH7263]	= "SH7263",
 	[CPU_SH7206]	= "SH7206",	[CPU_SH7619]	= "SH7619",
 	[CPU_SH7705]	= "SH7705",	[CPU_SH7706]	= "SH7706",
 	[CPU_SH7707]	= "SH7707",	[CPU_SH7708]	= "SH7708",
 	[CPU_SH7709]	= "SH7709",	[CPU_SH7710]	= "SH7710",
 	[CPU_SH7712]	= "SH7712",	[CPU_SH7720]	= "SH7720",
 	[CPU_SH7721]	= "SH7721",	[CPU_SH7729]	= "SH7729",
 	[CPU_SH7750]	= "SH7750",	[CPU_SH7750S]	= "SH7750S",
 	[CPU_SH7750R]	= "SH7750R",	[CPU_SH7751]	= "SH7751",
 	[CPU_SH7751R]	= "SH7751R",	[CPU_SH7760]	= "SH7760",
 	[CPU_SH4_202]	= "SH4-202",	[CPU_SH4_501]	= "SH4-501",
 	[CPU_SH7763]	= "SH7763",	[CPU_SH7770]	= "SH7770",
 	[CPU_SH7780]	= "SH7780",	[CPU_SH7781]	= "SH7781",
 	[CPU_SH7343]	= "SH7343",	[CPU_SH7785]	= "SH7785",
 	[CPU_SH7722]	= "SH7722",	[CPU_SHX3]	= "SH-X3",
 	[CPU_SH5_101]	= "SH5-101",	[CPU_SH5_103]	= "SH5-103",
 	[CPU_SH_NONE]	= "Unknown"
 };

 const char *get_cpu_subtype(struct sh_cpuinfo *c)
 {
 	return cpu_name[c->type];
 }

 #ifdef CONFIG_PROC_FS
 /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
 static const char *cpu_flags[] = {
 	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
 	"ptea", "llsc", "l2", "op32", NULL
 };

 static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
 {
 	unsigned long i;

 	seq_printf(m, "cpu flags\t:");

 	if (!c->flags) {
 		seq_printf(m, " %s\n", cpu_flags[0]);
 		return;
 	}

 	for (i = 0; cpu_flags[i]; i++)
 		if ((c->flags & (1 << i)))
 			seq_printf(m, " %s", cpu_flags[i+1]);

 	seq_printf(m, "\n");
 }

 static void show_cacheinfo(struct seq_file *m, const char *type,
 			   struct cache_info info)
 {
 	unsigned int cache_size;

 	cache_size = info.ways * info.sets * info.linesz;

 	seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
 		   type, cache_size >> 10, info.ways);
 }

 /*
  *	Get CPU information for use by the procfs.
  */
 static int show_cpuinfo(struct seq_file *m, void *v)
 {
 	struct sh_cpuinfo *c = v;
 	unsigned int cpu = c - cpu_data;

 	if (!cpu_online(cpu))
 		return 0;

 	if (cpu == 0)
 		seq_printf(m, "machine\t\t: %s\n", get_system_type());

 	seq_printf(m, "processor\t: %d\n", cpu);
 	seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
 	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));

 	show_cpuflags(m, c);

 	seq_printf(m, "cache type\t: ");

 	/*
 	 * Check for what type of cache we have, we support both the
 	 * unified cache on the SH-2 and SH-3, as well as the harvard
 	 * style cache on the SH-4.
 	 */
 	if (c->icache.flags & SH_CACHE_COMBINED) {
 		seq_printf(m, "unified\n");
 		show_cacheinfo(m, "cache", c->icache);
 	} else {
 		seq_printf(m, "split (harvard)\n");
 		show_cacheinfo(m, "icache", c->icache);
 		show_cacheinfo(m, "dcache", c->dcache);
 	}

 	/* Optional secondary cache */
 	if (c->flags & CPU_HAS_L2_CACHE)
 		show_cacheinfo(m, "scache", c->scache);

 	seq_printf(m, "bogomips\t: %lu.%02lu\n",
 		     c->loops_per_jiffy/(500000/HZ),
 		     (c->loops_per_jiffy/(5000/HZ)) % 100);

 	return 0;
 }

 static void *c_start(struct seq_file *m, loff_t *pos)
 {
 	return *pos < NR_CPUS ? cpu_data + *pos : NULL;
 }
 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	++*pos;
 	return c_start(m, pos);
 }
 static void c_stop(struct seq_file *m, void *v)
 {
 }
 const struct seq_operations cpuinfo_op = {
 	.start	= c_start,
 	.next	= c_next,
 	.stop	= c_stop,
 	.show	= show_cpuinfo,
 };
 #endif /* CONFIG_PROC_FS */
	/*
	* arch/sh/kernel/setup.c
	*
	* This file handles the architecture-dependent parts of initialization
	*
	* Copyright (C) 1999 Niibe Yutaka
	* Copyright (C) 2002 - 2007 Paul Mundt
	*/
	#include <linux/screen_info.h>
	#include <linux/ioport.h>
	#include <linux/init.h>
	#include <linux/initrd.h>
	#include <linux/bootmem.h>
	#include <linux/console.h>
	#include <linux/seq_file.h>
	#include <linux/root_dev.h>
	#include <linux/utsname.h>
	#include <linux/nodemask.h>
	#include <linux/cpu.h>
	#include <linux/pfn.h>
	#include <linux/fs.h>
	#include <linux/mm.h>
	#include <linux/kexec.h>
	#include <linux/module.h>
	#include <linux/smp.h>
	#include <asm/uaccess.h>
	#include <asm/io.h>
	#include <asm/page.h>
	#include <asm/elf.h>
	#include <asm/sections.h>
	#include <asm/irq.h>
	#include <asm/setup.h>
	#include <asm/clock.h>
	#include <asm/mmu_context.h>

	/*
	* Initialize loops_per_jiffy as 10000000 (1000MIPS).
	* This value will be used at the very early stage of serial setup.
	* The bigger value means no problem.
	*/
	struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
	[0] = {
	.type = CPU_SH_NONE,
	.loops_per_jiffy = 10000000,
	},
	};
	EXPORT_SYMBOL(cpu_data);

	/*
	* The machine vector. First entry in .machvec.init, or clobbered by
	* sh_mv= on the command line, prior to .machvec.init teardown.
	*/
	struct sh_machine_vector sh_mv = { .mv_name = "generic", };

	#ifdef CONFIG_VT
	struct screen_info screen_info;
	#endif

	extern int root_mountflags;

	#define RAMDISK_IMAGE_START_MASK 0x07FF
	#define RAMDISK_PROMPT_FLAG 0x8000
	#define RAMDISK_LOAD_FLAG 0x4000

	static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };

	static struct resource code_resource = {
	.name = "Kernel code",
	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	};

	static struct resource data_resource = {
	.name = "Kernel data",
	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	};

	unsigned long memory_start;
	EXPORT_SYMBOL(memory_start);
	unsigned long memory_end = 0;
	EXPORT_SYMBOL(memory_end);

	int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;

	static int __init early_parse_mem(char *p)
	{
	unsigned long size;

	memory_start = (unsigned long)__va(__MEMORY_START);
	size = memparse(p, &p);

	if (size > __MEMORY_SIZE) {
	static char msg[] __initdata = KERN_ERR
	"Using mem= to increase the size of kernel memory "
	"is not allowed.\n"
	" Recompile the kernel with the correct value for "
	"CONFIG_MEMORY_SIZE.\n";
	printk(msg);
	return 0;
	}

	memory_end = memory_start + size;

	return 0;
	}
	early_param("mem", early_parse_mem);

	/*
	* Register fully available low RAM pages with the bootmem allocator.
	*/
	static void __init register_bootmem_low_pages(void)
	{
	unsigned long curr_pfn, last_pfn, pages;

	/*
	* We are rounding up the start address of usable memory:
	*/
	curr_pfn = PFN_UP(__MEMORY_START);

	/*
	* ... and at the end of the usable range downwards:
	*/
	last_pfn = PFN_DOWN(__pa(memory_end));

	if (last_pfn > max_low_pfn)
	last_pfn = max_low_pfn;

	pages = last_pfn - curr_pfn;
	free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
	}

	#ifdef CONFIG_KEXEC
	static void __init reserve_crashkernel(void)
	{
	unsigned long long free_mem;
	unsigned long long crash_size, crash_base;
	int ret;

	free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;

	ret = parse_crashkernel(boot_command_line, free_mem,
	&crash_size, &crash_base);
	if (ret == 0 && crash_size) {
	if (crash_base > 0) {
	printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
	"for crashkernel (System RAM: %ldMB)\n",
	(unsigned long)(crash_size >> 20),
	(unsigned long)(crash_base >> 20),
	(unsigned long)(free_mem >> 20));
	crashk_res.start = crash_base;
	crashk_res.end = crash_base + crash_size - 1;
	reserve_bootmem(crash_base, crash_size);
	} else
	printk(KERN_INFO "crashkernel reservation failed - "
	"you have to specify a base address\n");
	}
	}
	#else
	static inline void __init reserve_crashkernel(void)
	{}
	#endif

	void __init setup_bootmem_allocator(unsigned long free_pfn)
	{
	unsigned long bootmap_size;

	/*
	* Find a proper area for the bootmem bitmap. After this
	* bootstrap step all allocations (until the page allocator
	* is intact) must be done via bootmem_alloc().
	*/
	bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
	min_low_pfn, max_low_pfn);

	add_active_range(0, min_low_pfn, max_low_pfn);
	register_bootmem_low_pages();

	node_set_online(0);

	/*
	* Reserve the kernel text and
	* Reserve the bootmem bitmap. We do this in two steps (first step
	* was init_bootmem()), because this catches the (definitely buggy)
	* case of us accidentally initializing the bootmem allocator with
	* an invalid RAM area.
	*/
	reserve_bootmem(__MEMORY_START+PAGE_SIZE,
	(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);

	/*
	* reserve physical page 0 - it's a special BIOS page on many boxes,
	* enabling clean reboots, SMP operation, laptop functions.
	*/
	reserve_bootmem(__MEMORY_START, PAGE_SIZE);

	sparse_memory_present_with_active_regions(0);

	#ifdef CONFIG_BLK_DEV_INITRD
	ROOT_DEV = Root_RAM0;

	if (LOADER_TYPE && INITRD_START) {
	if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
	reserve_bootmem(INITRD_START + __MEMORY_START,
	INITRD_SIZE);
	initrd_start = INITRD_START + PAGE_OFFSET +
	__MEMORY_START;
	initrd_end = initrd_start + INITRD_SIZE;
	} else {
	printk("initrd extends beyond end of memory "
	"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
	INITRD_START + INITRD_SIZE,
	max_low_pfn << PAGE_SHIFT);
	initrd_start = 0;
	}
	}
	#endif

	reserve_crashkernel();
	}

	#ifndef CONFIG_NEED_MULTIPLE_NODES
	static void __init setup_memory(void)
	{
	unsigned long start_pfn;

	/*
	* Partially used pages are not usable - thus
	* we are rounding upwards:
	*/
	start_pfn = PFN_UP(__pa(_end));
	setup_bootmem_allocator(start_pfn);
	}
	#else
	extern void __init setup_memory(void);
	#endif

	void __init setup_arch(char **cmdline_p)
	{
	enable_mmu();

	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);

	#ifdef CONFIG_BLK_DEV_RAM
	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
	#endif

	if (!MOUNT_ROOT_RDONLY)
	root_mountflags &= ~MS_RDONLY;
	init_mm.start_code = (unsigned long) _text;
	init_mm.end_code = (unsigned long) _etext;
	init_mm.end_data = (unsigned long) _edata;
	init_mm.brk = (unsigned long) _end;

	code_resource.start = virt_to_phys(_text);
	code_resource.end = virt_to_phys(_etext)-1;
	data_resource.start = virt_to_phys(_etext);
	data_resource.end = virt_to_phys(_edata)-1;

	memory_start = (unsigned long)__va(__MEMORY_START);
	if (!memory_end)
	memory_end = memory_start + __MEMORY_SIZE;

	#ifdef CONFIG_CMDLINE_BOOL
	strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
	#else
	strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
	#endif

	/* Save unparsed command line copy for /proc/cmdline */
	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
	*cmdline_p = command_line;

	parse_early_param();

	sh_mv_setup();

	/*
	* Find the highest page frame number we have available
	*/
	max_pfn = PFN_DOWN(__pa(memory_end));

	/*
	* Determine low and high memory ranges:
	*/
	max_low_pfn = max_pfn;
	min_low_pfn = __MEMORY_START >> PAGE_SHIFT;

	nodes_clear(node_online_map);

	/* Setup bootmem with available RAM */
	setup_memory();
	sparse_init();

	#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
	#endif

	/* Perform the machine specific initialisation */
	if (likely(sh_mv.mv_setup))
	sh_mv.mv_setup(cmdline_p);

	paging_init();

	#ifdef CONFIG_SMP
	plat_smp_setup();
	#endif
	}

	static const char *cpu_name[] = {
	[CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
	[CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
	[CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
	[CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
	[CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
	[CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
	[CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
	[CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
	[CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
	[CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
	[CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
	[CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
	[CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
	[CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
	[CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
	[CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
	[CPU_SH_NONE] = "Unknown"
	};

	const char get_cpu_subtype(struct sh_cpuinfo c)
	{
	return cpu_name[c->type];
	}

	#ifdef CONFIG_PROC_FS
	/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
	static const char *cpu_flags[] = {
	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
	"ptea", "llsc", "l2", "op32", NULL
	};

	static void show_cpuflags(struct seq_file m, struct sh_cpuinfo c)
	{
	unsigned long i;

	seq_printf(m, "cpu flags\t:");

	if (!c->flags) {
	seq_printf(m, " %s\n", cpu_flags[0]);
	return;
	}

	for (i = 0; cpu_flags[i]; i++)
	if ((c->flags & (1 << i)))
	seq_printf(m, " %s", cpu_flags[i+1]);

	seq_printf(m, "\n");
	}

	static void show_cacheinfo(struct seq_file m, const char type,
	struct cache_info info)
	{
	unsigned int cache_size;

	cache_size = info.ways * info.sets * info.linesz;

	seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
	type, cache_size >> 10, info.ways);
	}

	/*
	* Get CPU information for use by the procfs.
	*/
	static int show_cpuinfo(struct seq_file m, void v)
	{
	struct sh_cpuinfo *c = v;
	unsigned int cpu = c - cpu_data;

	if (!cpu_online(cpu))
	return 0;

	if (cpu == 0)
	seq_printf(m, "machine\t\t: %s\n", get_system_type());

	seq_printf(m, "processor\t: %d\n", cpu);
	seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));

	show_cpuflags(m, c);

	seq_printf(m, "cache type\t: ");

	/*
	* Check for what type of cache we have, we support both the
	* unified cache on the SH-2 and SH-3, as well as the harvard
	* style cache on the SH-4.
	*/
	if (c->icache.flags & SH_CACHE_COMBINED) {
	seq_printf(m, "unified\n");
	show_cacheinfo(m, "cache", c->icache);
	} else {
	seq_printf(m, "split (harvard)\n");
	show_cacheinfo(m, "icache", c->icache);
	show_cacheinfo(m, "dcache", c->dcache);
	}

	/* Optional secondary cache */
	if (c->flags & CPU_HAS_L2_CACHE)
	show_cacheinfo(m, "scache", c->scache);

	seq_printf(m, "bogomips\t: %lu.%02lu\n",
	c->loops_per_jiffy/(500000/HZ),
	(c->loops_per_jiffy/(5000/HZ)) % 100);

	return 0;
	}

	static void c_start(struct seq_file m, loff_t *pos)
	{
	return pos < NR_CPUS ? cpu_data + pos : NULL;
	}
	static void c_next(struct seq_file m, void v, loff_t pos)
	{
	++*pos;
	return c_start(m, pos);
	}
	static void c_stop(struct seq_file m, void v)
	{
	}
	const struct seq_operations cpuinfo_op = {
	.start = c_start,
	.next = c_next,
	.stop = c_stop,
	.show = show_cpuinfo,
	};
	#endif /* CONFIG_PROC_FS */