[deliverable/linux.git] / arch / sh / kernel / setup.c

/*
 * 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 <linux/err.h>
#include <linux/debugfs.h>
#include <linux/crash_dump.h>
#include <linux/mmzone.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/platform_device.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", };
EXPORT_SYMBOL(sh_mv);

#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,
};

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

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

static struct resource mem_resources[MAX_NUMNODES];

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) {
		printk(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");
		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;
	void *vp;
	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) {
			vp = alloc_bootmem_nopanic(crash_size);
			if (!vp) {
				printk(KERN_INFO "crashkernel allocation "
				       "failed\n");
				return;
			}
			crash_base = __pa(vp);
		} else if (reserve_bootmem(crash_base, crash_size,
					BOOTMEM_EXCLUSIVE) < 0) {
			printk(KERN_INFO "crashkernel reservation failed - "
					"memory is in use\n");
			return;
		}

		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;
		insert_resource(&iomem_resource, &crashk_res);
	}
}
#else
static inline void __init reserve_crashkernel(void)
{}
#endif

void __cpuinit calibrate_delay(void)
{
	struct clk *clk = clk_get(NULL, "cpu_clk");

	if (IS_ERR(clk))
		panic("Need a sane CPU clock definition!");

	loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;

	printk(KERN_INFO "Calibrating delay loop (skipped)... "
			 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
			 loops_per_jiffy/(500000/HZ),
			 (loops_per_jiffy/(5000/HZ)) % 100,
			 loops_per_jiffy);
}

void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
						unsigned long end_pfn)
{
	struct resource *res = &mem_resources[nid];

	WARN_ON(res->name); /* max one active range per node for now */

	res->name = "System RAM";
	res->start = start_pfn << PAGE_SHIFT;
	res->end = (end_pfn << PAGE_SHIFT) - 1;
	res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
	if (request_resource(&iomem_resource, res)) {
		pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
		       start_pfn, end_pfn);
		return;
	}

	/*
	 *  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_resource(res, &bss_resource);

	add_active_range(nid, start_pfn, end_pfn);
}

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 + CONFIG_ZERO_PAGE_OFFSET,
			(PFN_PHYS(free_pfn) + bootmap_size + PAGE_SIZE - 1) -
			(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET),
			BOOTMEM_DEFAULT);

	/*
	 * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
	 */
	if (CONFIG_ZERO_PAGE_OFFSET != 0)
		reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
				BOOTMEM_DEFAULT);

	sparse_memory_present_with_active_regions(0);

#ifdef CONFIG_BLK_DEV_INITRD
	ROOT_DEV = Root_RAM0;

	if (LOADER_TYPE && INITRD_START) {
		unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;

		if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
			reserve_bootmem(initrd_start_phys, INITRD_SIZE,
					BOOTMEM_DEFAULT);
			initrd_start = (unsigned long)__va(initrd_start_phys);
			initrd_end = initrd_start + INITRD_SIZE;
		} else {
			printk("initrd extends beyond end of memory "
			       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
			       initrd_start_phys + INITRD_SIZE,
			       (unsigned long)PFN_PHYS(max_low_pfn));
			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

/*
 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
 * is_kdump_kernel() to determine if we are booting after a panic. Hence
 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
 */
#ifdef CONFIG_CRASH_DUMP
/* elfcorehdr= specifies the location of elf core header
 * stored by the crashed kernel.
 */
static int __init parse_elfcorehdr(char *arg)
{
	if (!arg)
		return -EINVAL;
	elfcorehdr_addr = memparse(arg, &arg);
	return 0;
}
early_param("elfcorehdr", parse_elfcorehdr);
#endif

void __init __attribute__ ((weak)) plat_early_device_setup(void)
{
}

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

	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);

	printk(KERN_NOTICE "Boot params:\n"
			   "... MOUNT_ROOT_RDONLY - %08lx\n"
			   "... RAMDISK_FLAGS     - %08lx\n"
			   "... ORIG_ROOT_DEV     - %08lx\n"
			   "... LOADER_TYPE       - %08lx\n"
			   "... INITRD_START      - %08lx\n"
			   "... INITRD_SIZE       - %08lx\n",
			   MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
			   ORIG_ROOT_DEV, LOADER_TYPE,
			   INITRD_START, INITRD_SIZE);

#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;
	bss_resource.start = virt_to_phys(__bss_start);
	bss_resource.end = virt_to_phys(_ebss)-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();

	plat_early_device_setup();

	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
}

/* processor boot mode configuration */
int generic_mode_pins(void)
{
	pr_warning("generic_mode_pins(): missing mode pin configuration\n");
	return 0;
}

int test_mode_pin(int pin)
{
	return sh_mv.mv_mode_pins() & (1 << pin);
}

static const char *cpu_name[] = {
	[CPU_SH7201]	= "SH7201",
	[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_SH7786]	= "SH7786",
	[CPU_SH7722]	= "SH7722",	[CPU_SHX3]	= "SH-X3",
	[CPU_SH5_101]	= "SH5-101",	[CPU_SH5_103]	= "SH5-103",
	[CPU_MXG]	= "MX-G",	[CPU_SH7723]	= "SH7723",
	[CPU_SH7366]	= "SH7366",	[CPU_SH7724]	= "SH7724",
	[CPU_SH_NONE]	= "Unknown"
};

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

#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", "pteaex", 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));
	if (c->cut_major == -1)
		seq_printf(m, "cut\t\t: unknown\n");
	else if (c->cut_minor == -1)
		seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
	else
		seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);

	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 */

struct dentry *sh_debugfs_root;

static int __init sh_debugfs_init(void)
{
	sh_debugfs_root = debugfs_create_dir("sh", NULL);
	if (!sh_debugfs_root)
		return -ENOMEM;
	if (IS_ERR(sh_debugfs_root))
		return PTR_ERR(sh_debugfs_root);

	return 0;
}
arch_initcall(sh_debugfs_init);
Commit	Line	Data
711fa809	1	/*
11c19656	2	* arch/sh/kernel/setup.c
1da177e4	3	*
1da177e4	4	* This file handles the architecture-dependent parts of initialization
11c19656 PM	5	*
11c19656 PM	6	* Copyright (C) 1999 Niibe Yutaka
01066625	7	* Copyright (C) 2002 - 2007 Paul Mundt
1da177e4	8	*/
894673ee	9	#include <linux/screen_info.h>
1da177e4 LT	10	#include <linux/ioport.h>
	11	#include <linux/init.h>
	12	#include <linux/initrd.h>
	13	#include <linux/bootmem.h>
	14	#include <linux/console.h>
	15	#include <linux/seq_file.h>
	16	#include <linux/root_dev.h>
	17	#include <linux/utsname.h>
01066625	18	#include <linux/nodemask.h>
1da177e4	19	#include <linux/cpu.h>
22a9835c	20	#include <linux/pfn.h>
711fa809	21	#include <linux/fs.h>
01066625	22	#include <linux/mm.h>
4d5ade5b	23	#include <linux/kexec.h>
98d877c4	24	#include <linux/module.h>
0016a126	25	#include <linux/smp.h>
b9e393c2 PM	26	#include <linux/err.h>
b9e393c2 PM	27	#include <linux/debugfs.h>
daf423db	28	#include <linux/crash_dump.h>
fa43972f	29	#include <linux/mmzone.h>
cf204fa7 PM	30	#include <linux/clk.h>
cf204fa7 PM	31	#include <linux/delay.h>
87a00dc0	32	#include <linux/platform_device.h>
1da177e4 LT	33	#include <asm/uaccess.h>
1da177e4 LT	34	#include <asm/io.h>
7a302a96	35	#include <asm/page.h>
cd01204b	36	#include <asm/elf.h>
1da177e4 LT	37	#include <asm/sections.h>
	38	#include <asm/irq.h>
	39	#include <asm/setup.h>
de02797a	40	#include <asm/clock.h>
01066625	41	#include <asm/mmu_context.h>
1da177e4	42
1da177e4 LT	43	/*
	44	* Initialize loops_per_jiffy as 10000000 (1000MIPS).
	45	* This value will be used at the very early stage of serial setup.
	46	* The bigger value means no problem.
	47	*/
2d4a73d5 PM	48	struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
	49	[0] = {
	50	.type = CPU_SH_NONE,
	51	.loops_per_jiffy = 10000000,
	52	},
	53	};
	54	EXPORT_SYMBOL(cpu_data);
82f81f47 PM	55
	56	/*
	57	* The machine vector. First entry in .machvec.init, or clobbered by
	58	* sh_mv= on the command line, prior to .machvec.init teardown.
	59	*/
fd8f20e8	60	struct sh_machine_vector sh_mv = { .mv_name = "generic", };
971ac16d	61	EXPORT_SYMBOL(sh_mv);
82f81f47	62
2c7834a6	63	#ifdef CONFIG_VT
1da177e4	64	struct screen_info screen_info;
2c7834a6	65	#endif
1da177e4	66
1da177e4 LT	67	extern int root_mountflags;
1da177e4 LT	68
65463b73	69	#define RAMDISK_IMAGE_START_MASK 0x07FF
1da177e4	70	#define RAMDISK_PROMPT_FLAG 0x8000
65463b73	71	#define RAMDISK_LOAD_FLAG 0x4000
1da177e4	72
53c82622	73	static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
1da177e4	74
69d1ef4c PM	75	static struct resource code_resource = {
	76	.name = "Kernel code",
	77	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	78	};
	79
	80	static struct resource data_resource = {
	81	.name = "Kernel data",
	82	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	83	};
1da177e4	84
3d83984e MD	85	static struct resource bss_resource = {
	86	.name = "Kernel bss",
	87	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	88	};
	89
98d877c4 PM	90	unsigned long memory_start;
98d877c4 PM	91	EXPORT_SYMBOL(memory_start);
7e5186ea	92	unsigned long memory_end = 0;
98d877c4	93	EXPORT_SYMBOL(memory_end);
1da177e4	94
0146ba78 MD	95	static struct resource mem_resources[MAX_NUMNODES];
0146ba78 MD	96
cd01204b PM	97	int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
cd01204b PM	98
9655ad03	99	static int __init early_parse_mem(char *p)
1da177e4	100	{
9655ad03	101	unsigned long size;
1da177e4	102
d02b08f6	103	memory_start = (unsigned long)__va(__MEMORY_START);
9655ad03	104	size = memparse(p, &p);
80a68a43 SM	105
80a68a43 SM	106	if (size > __MEMORY_SIZE) {
0bd4781d	107	printk(KERN_ERR
80a68a43 SM	108	"Using mem= to increase the size of kernel memory "
	109	"is not allowed.\n"
	110	" Recompile the kernel with the correct value for "
0bd4781d	111	"CONFIG_MEMORY_SIZE.\n");
80a68a43 SM	112	return 0;
	113	}
	114
9655ad03	115	memory_end = memory_start + size;
2c7834a6	116
1da177e4 LT	117	return 0;
1da177e4 LT	118	}
9655ad03	119	early_param("mem", early_parse_mem);
1da177e4	120
01066625 PM	121	/*
	122	* Register fully available low RAM pages with the bootmem allocator.
	123	*/
	124	static void __init register_bootmem_low_pages(void)
1da177e4	125	{
01066625	126	unsigned long curr_pfn, last_pfn, pages;
b641fe01	127
1da177e4	128	/*
01066625	129	* We are rounding up the start address of usable memory:
1da177e4	130	*/
01066625	131	curr_pfn = PFN_UP(__MEMORY_START);
1da177e4 LT	132
1da177e4 LT	133	/*
01066625	134	* ... and at the end of the usable range downwards:
1da177e4	135	*/
01066625	136	last_pfn = PFN_DOWN(__pa(memory_end));
1da177e4	137
01066625 PM	138	if (last_pfn > max_low_pfn)
	139	last_pfn = max_low_pfn;
	140
	141	pages = last_pfn - curr_pfn;
	142	free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
	143	}
	144
7d7712a3 BW	145	#ifdef CONFIG_KEXEC
	146	static void __init reserve_crashkernel(void)
	147	{
	148	unsigned long long free_mem;
	149	unsigned long long crash_size, crash_base;
4aeaa223	150	void *vp;
7d7712a3 BW	151	int ret;
	152
	153	free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
	154
	155	ret = parse_crashkernel(boot_command_line, free_mem,
	156	&crash_size, &crash_base);
	157	if (ret == 0 && crash_size) {
18a01a3b	158	if (crash_base <= 0) {
7b551f9d	159	vp = alloc_bootmem_nopanic(crash_size);
4aeaa223 MD	160	if (!vp) {
	161	printk(KERN_INFO "crashkernel allocation "
	162	"failed\n");
	163	return;
	164	}
	165	crash_base = __pa(vp);
	166	} else if (reserve_bootmem(crash_base, crash_size,
18a01a3b BW	167	BOOTMEM_EXCLUSIVE) < 0) {
	168	printk(KERN_INFO "crashkernel reservation failed - "
	169	"memory is in use\n");
	170	return;
	171	}
	172
	173	printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
	174	"for crashkernel (System RAM: %ldMB)\n",
	175	(unsigned long)(crash_size >> 20),
	176	(unsigned long)(crash_base >> 20),
	177	(unsigned long)(free_mem >> 20));
	178	crashk_res.start = crash_base;
	179	crashk_res.end = crash_base + crash_size - 1;
34894c78	180	insert_resource(&iomem_resource, &crashk_res);
7d7712a3 BW	181	}
	182	}
	183	#else
	184	static inline void __init reserve_crashkernel(void)
	185	{}
	186	#endif
	187
cf204fa7 PM	188	void __cpuinit calibrate_delay(void)
	189	{
	190	struct clk *clk = clk_get(NULL, "cpu_clk");
	191
	192	if (IS_ERR(clk))
	193	panic("Need a sane CPU clock definition!");
	194
	195	loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
	196
	197	printk(KERN_INFO "Calibrating delay loop (skipped)... "
	198	"%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
	199	loops_per_jiffy/(500000/HZ),
	200	(loops_per_jiffy/(5000/HZ)) % 100,
	201	loops_per_jiffy);
	202	}
cf204fa7	203
0146ba78 MD	204	void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
	205	unsigned long end_pfn)
	206	{
	207	struct resource *res = &mem_resources[nid];
	208
	209	WARN_ON(res->name); /* max one active range per node for now */
	210
	211	res->name = "System RAM";
	212	res->start = start_pfn << PAGE_SHIFT;
	213	res->end = (end_pfn << PAGE_SHIFT) - 1;
	214	res->flags = IORESOURCE_MEM \| IORESOURCE_BUSY;
	215	if (request_resource(&iomem_resource, res)) {
	216	pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
	217	start_pfn, end_pfn);
	218	return;
	219	}
	220
	221	/*
	222	* We don't know which RAM region contains kernel data,
	223	* so we try it repeatedly and let the resource manager
	224	* test it.
	225	*/
	226	request_resource(res, &code_resource);
	227	request_resource(res, &data_resource);
	228	request_resource(res, &bss_resource);
	229
0146ba78 MD	230	add_active_range(nid, start_pfn, end_pfn);
	231	}
	232
2826fa61	233	void __init setup_bootmem_allocator(unsigned long free_pfn)
01066625 PM	234	{
01066625 PM	235	unsigned long bootmap_size;
1da177e4 LT	236
	237	/*
	238	* Find a proper area for the bootmem bitmap. After this
	239	* bootstrap step all allocations (until the page allocator
	240	* is intact) must be done via bootmem_alloc().
	241	*/
2826fa61	242	bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
01066625	243	min_low_pfn, max_low_pfn);
1da177e4	244
0146ba78	245	__add_active_range(0, min_low_pfn, max_low_pfn);
01066625	246	register_bootmem_low_pages();
1da177e4	247
01066625	248	node_set_online(0);
b641fe01	249
1da177e4 LT	250	/*
	251	* Reserve the kernel text and
	252	* Reserve the bootmem bitmap. We do this in two steps (first step
	253	* was init_bootmem()), because this catches the (definitely buggy)
	254	* case of us accidentally initializing the bootmem allocator with
	255	* an invalid RAM area.
	256	*/
f040ddaf SM	257	reserve_bootmem(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
	258	(PFN_PHYS(free_pfn) + bootmap_size + PAGE_SIZE - 1) -
	259	(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET),
	260	BOOTMEM_DEFAULT);
1da177e4 LT	261
1da177e4 LT	262	/*
48865163	263	* Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
1da177e4	264	*/
48865163 CS	265	if (CONFIG_ZERO_PAGE_OFFSET != 0)
	266	reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
	267	BOOTMEM_DEFAULT);
1da177e4	268
2826fa61 PM	269	sparse_memory_present_with_active_regions(0);
2826fa61 PM	270
1da177e4	271	#ifdef CONFIG_BLK_DEV_INITRD
3f9654f0	272	ROOT_DEV = Root_RAM0;
1da177e4 LT	273
1da177e4 LT	274	if (LOADER_TYPE && INITRD_START) {
28d6e52c SM	275	unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;
	276
	277	if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
	278	reserve_bootmem(initrd_start_phys, INITRD_SIZE,
	279	BOOTMEM_DEFAULT);
	280	initrd_start = (unsigned long)__va(initrd_start_phys);
1da177e4 LT	281	initrd_end = initrd_start + INITRD_SIZE;
	282	} else {
	283	printk("initrd extends beyond end of memory "
28d6e52c SM	284	"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
28d6e52c SM	285	initrd_start_phys + INITRD_SIZE,
9a19eb2a	286	(unsigned long)PFN_PHYS(max_low_pfn));
1da177e4 LT	287	initrd_start = 0;
	288	}
	289	}
	290	#endif
7d7712a3 BW	291
7d7712a3 BW	292	reserve_crashkernel();
01066625 PM	293	}
	294
	295	#ifndef CONFIG_NEED_MULTIPLE_NODES
	296	static void __init setup_memory(void)
	297	{
	298	unsigned long start_pfn;
	299
	300	/*
	301	* Partially used pages are not usable - thus
	302	* we are rounding upwards:
	303	*/
	304	start_pfn = PFN_UP(__pa(_end));
	305	setup_bootmem_allocator(start_pfn);
	306	}
	307	#else
	308	extern void __init setup_memory(void);
	309	#endif
	310
daf423db SH	311	/*
	312	* Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
	313	* is_kdump_kernel() to determine if we are booting after a panic. Hence
	314	* ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
	315	*/
	316	#ifdef CONFIG_CRASH_DUMP
	317	/* elfcorehdr= specifies the location of elf core header
	318	* stored by the crashed kernel.
	319	*/
	320	static int __init parse_elfcorehdr(char *arg)
	321	{
	322	if (!arg)
	323	return -EINVAL;
	324	elfcorehdr_addr = memparse(arg, &arg);
	325	return 0;
	326	}
	327	early_param("elfcorehdr", parse_elfcorehdr);
	328	#endif
	329
87a00dc0 MD	330	void __init __attribute__ ((weak)) plat_early_device_setup(void)
	331	{
	332	}
	333
01066625 PM	334	void __init setup_arch(char **cmdline_p)
	335	{
	336	enable_mmu();
	337
01066625 PM	338	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
01066625 PM	339
0105346c PM	340	printk(KERN_NOTICE "Boot params:\n"
	341	"... MOUNT_ROOT_RDONLY - %08lx\n"
	342	"... RAMDISK_FLAGS - %08lx\n"
	343	"... ORIG_ROOT_DEV - %08lx\n"
	344	"... LOADER_TYPE - %08lx\n"
	345	"... INITRD_START - %08lx\n"
	346	"... INITRD_SIZE - %08lx\n",
	347	MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
	348	ORIG_ROOT_DEV, LOADER_TYPE,
	349	INITRD_START, INITRD_SIZE);
	350
01066625 PM	351	#ifdef CONFIG_BLK_DEV_RAM
	352	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
	353	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
	354	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
	355	#endif
	356
	357	if (!MOUNT_ROOT_RDONLY)
	358	root_mountflags &= ~MS_RDONLY;
	359	init_mm.start_code = (unsigned long) _text;
	360	init_mm.end_code = (unsigned long) _etext;
	361	init_mm.end_data = (unsigned long) _edata;
	362	init_mm.brk = (unsigned long) _end;
	363
	364	code_resource.start = virt_to_phys(_text);
	365	code_resource.end = virt_to_phys(_etext)-1;
	366	data_resource.start = virt_to_phys(_etext);
	367	data_resource.end = virt_to_phys(_edata)-1;
3d83984e MD	368	bss_resource.start = virt_to_phys(__bss_start);
3d83984e MD	369	bss_resource.end = virt_to_phys(_ebss)-1;
01066625	370
d02b08f6	371	memory_start = (unsigned long)__va(__MEMORY_START);
7e5186ea PM	372	if (!memory_end)
7e5186ea PM	373	memory_end = memory_start + __MEMORY_SIZE;
9655ad03	374
ba36197c PM	375	#ifdef CONFIG_CMDLINE_BOOL
	376	strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
	377	#else
	378	strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
	379	#endif
9655ad03	380
ba36197c PM	381	/* Save unparsed command line copy for /proc/cmdline */
ba36197c PM	382	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
9655ad03 PM	383	*cmdline_p = command_line;
9655ad03 PM	384
01066625 PM	385	parse_early_param();
01066625 PM	386
87a00dc0 MD	387	plat_early_device_setup();
87a00dc0 MD	388
9655ad03	389	sh_mv_setup();
01066625 PM	390
	391	/*
	392	* Find the highest page frame number we have available
	393	*/
	394	max_pfn = PFN_DOWN(__pa(memory_end));
	395
	396	/*
	397	* Determine low and high memory ranges:
	398	*/
	399	max_low_pfn = max_pfn;
	400	min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
	401
	402	nodes_clear(node_online_map);
dfbb9042 PM	403
dfbb9042 PM	404	/* Setup bootmem with available RAM */
01066625	405	setup_memory();
01066625	406	sparse_init();
1da177e4 LT	407
	408	#ifdef CONFIG_DUMMY_CONSOLE
	409	conswitchp = &dummy_con;
	410	#endif
	411
	412	/* Perform the machine specific initialisation */
2c7834a6 PM	413	if (likely(sh_mv.mv_setup))
2c7834a6 PM	414	sh_mv.mv_setup(cmdline_p);
1da177e4	415
dfbb9042	416	paging_init();
0016a126 PM	417
	418	#ifdef CONFIG_SMP
	419	plat_smp_setup();
	420	#endif
dfbb9042	421	}
1da177e4	422
eb9b9b56 MD	423	/* processor boot mode configuration */
	424	int generic_mode_pins(void)
	425	{
	426	pr_warning("generic_mode_pins(): missing mode pin configuration\n");
	427	return 0;
	428	}
	429
	430	int test_mode_pin(int pin)
	431	{
	432	return sh_mv.mv_mode_pins() & (1 << pin);
	433	}
	434
1da177e4	435	static const char *cpu_name[] = {
2825999e	436	[CPU_SH7201] = "SH7201",
a8f67f4b	437	[CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
b552c7e8	438	[CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
e5723e0e PM	439	[CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
	440	[CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
	441	[CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
3ea6bc3d	442	[CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
31a49c4b YS	443	[CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
	444	[CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
	445	[CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
	446	[CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
e5723e0e	447	[CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
7d740a06 YS	448	[CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
	449	[CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
	450	[CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
55ba99eb	451	[CPU_SH7786] = "SH7786",
7d740a06	452	[CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
c2672f62	453	[CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
178dd0cd	454	[CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723",
0207a2ef KM	455	[CPU_SH7366] = "SH7366", [CPU_SH7724] = "SH7724",
0207a2ef KM	456	[CPU_SH_NONE] = "Unknown"
1da177e4 LT	457	};
1da177e4 LT	458
11c19656	459	const char get_cpu_subtype(struct sh_cpuinfo c)
1da177e4	460	{
11c19656	461	return cpu_name[c->type];
1da177e4	462	}
b19a33ca	463	EXPORT_SYMBOL(get_cpu_subtype);
1da177e4 LT	464
1da177e4 LT	465	#ifdef CONFIG_PROC_FS
2220d164	466	/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
1da177e4	467	static const char *cpu_flags[] = {
2220d164	468	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
8263a67e	469	"ptea", "llsc", "l2", "op32", "pteaex", NULL
1da177e4 LT	470	};
1da177e4 LT	471
11c19656	472	static void show_cpuflags(struct seq_file m, struct sh_cpuinfo c)
1da177e4 LT	473	{
	474	unsigned long i;
	475
	476	seq_printf(m, "cpu flags\t:");
	477
11c19656	478	if (!c->flags) {
1da177e4 LT	479	seq_printf(m, " %s\n", cpu_flags[0]);
	480	return;
	481	}
	482
de02797a	483	for (i = 0; cpu_flags[i]; i++)
11c19656	484	if ((c->flags & (1 << i)))
1da177e4 LT	485	seq_printf(m, " %s", cpu_flags[i+1]);
	486
	487	seq_printf(m, "\n");
	488	}
	489
2c7834a6 PM	490	static void show_cacheinfo(struct seq_file m, const char type,
2c7834a6 PM	491	struct cache_info info)
1da177e4 LT	492	{
	493	unsigned int cache_size;
	494
	495	cache_size = info.ways * info.sets * info.linesz;
	496
de02797a PM	497	seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
de02797a PM	498	type, cache_size >> 10, info.ways);
1da177e4 LT	499	}
	500
	501	/*
	502	* Get CPU information for use by the procfs.
	503	*/
	504	static int show_cpuinfo(struct seq_file m, void v)
	505	{
11c19656 PM	506	struct sh_cpuinfo *c = v;
	507	unsigned int cpu = c - cpu_data;
	508
	509	if (!cpu_online(cpu))
	510	return 0;
1da177e4	511
11c19656	512	if (cpu == 0)
1da177e4 LT	513	seq_printf(m, "machine\t\t: %s\n", get_system_type());
	514
	515	seq_printf(m, "processor\t: %d\n", cpu);
96b644bd	516	seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
11c19656	517	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
3611ee7a SM	518	if (c->cut_major == -1)
	519	seq_printf(m, "cut\t\t: unknown\n");
	520	else if (c->cut_minor == -1)
	521	seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
	522	else
	523	seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);
1da177e4	524
11c19656	525	show_cpuflags(m, c);
1da177e4 LT	526
	527	seq_printf(m, "cache type\t: ");
	528
	529	/*
	530	* Check for what type of cache we have, we support both the
	531	* unified cache on the SH-2 and SH-3, as well as the harvard
	532	* style cache on the SH-4.
	533	*/
11c19656	534	if (c->icache.flags & SH_CACHE_COMBINED) {
1da177e4	535	seq_printf(m, "unified\n");
11c19656	536	show_cacheinfo(m, "cache", c->icache);
1da177e4 LT	537	} else {
1da177e4 LT	538	seq_printf(m, "split (harvard)\n");
11c19656 PM	539	show_cacheinfo(m, "icache", c->icache);
11c19656 PM	540	show_cacheinfo(m, "dcache", c->dcache);
1da177e4 LT	541	}
1da177e4 LT	542
72c35543	543	/* Optional secondary cache */
11c19656 PM	544	if (c->flags & CPU_HAS_L2_CACHE)
11c19656 PM	545	show_cacheinfo(m, "scache", c->scache);
72c35543	546
1da177e4	547	seq_printf(m, "bogomips\t: %lu.%02lu\n",
11c19656 PM	548	c->loops_per_jiffy/(500000/HZ),
11c19656 PM	549	(c->loops_per_jiffy/(5000/HZ)) % 100);
1da177e4	550
db62e5bd	551	return 0;
1da177e4 LT	552	}
1da177e4 LT	553
1da177e4 LT	554	static void c_start(struct seq_file m, loff_t *pos)
	555	{
	556	return pos < NR_CPUS ? cpu_data + pos : NULL;
	557	}
	558	static void c_next(struct seq_file m, void v, loff_t pos)
	559	{
	560	++*pos;
	561	return c_start(m, pos);
	562	}
	563	static void c_stop(struct seq_file m, void v)
	564	{
	565	}
773c7bd6	566	const struct seq_operations cpuinfo_op = {
1da177e4 LT	567	.start = c_start,
	568	.next = c_next,
	569	.stop = c_stop,
	570	.show = show_cpuinfo,
	571	};
	572	#endif /* CONFIG_PROC_FS */
b9e393c2 PM	573
	574	struct dentry *sh_debugfs_root;
	575
	576	static int __init sh_debugfs_init(void)
	577	{
	578	sh_debugfs_root = debugfs_create_dir("sh", NULL);
9986b311 Z	579	if (!sh_debugfs_root)
9986b311 Z	580	return -ENOMEM;
b9e393c2 PM	581	if (IS_ERR(sh_debugfs_root))
	582	return PTR_ERR(sh_debugfs_root);
	583
	584	return 0;
	585	}
	586	arch_initcall(sh_debugfs_init);