[linux-2.6-block.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 <asm/uaccess.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/clock.h>
#include <asm/mmu_context.h>

extern void * __rd_start, * __rd_end;

/*
 * Machine setup..
 */

/*
 * 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;

/*
 * This is set up by the setup-routine at boot-time
 */
#define PARAM	((unsigned char *)empty_zero_page)

#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
#define INITRD_START (*(unsigned long *) (PARAM+0x010))
#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
/* ... */
#define COMMAND_LINE ((char *) (PARAM+0x100))

#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", };
static struct resource data_resource = { .name = "Kernel data", };

unsigned long memory_start;
EXPORT_SYMBOL(memory_start);

unsigned long memory_end;
EXPORT_SYMBOL(memory_end);

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

	memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
	size = memparse(p, &p);
	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 = MKDEV(RAMDISK_MAJOR, 0);
	if (&__rd_start != &__rd_end) {
		LOADER_TYPE = 1;
		INITRD_START = PHYSADDR((unsigned long)&__rd_start) -
					__MEMORY_START;
		INITRD_SIZE = (unsigned long)&__rd_end -
			      (unsigned long)&__rd_start;
	}

	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)PAGE_OFFSET+__MEMORY_START;
	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_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_SH7729]	= "SH7729",	[CPU_SH7750]	= "SH7750",
	[CPU_SH7750S]	= "SH7750S",	[CPU_SH7750R]	= "SH7750R",
	[CPU_SH7751]	= "SH7751",	[CPU_SH7751R]	= "SH7751R",
	[CPU_SH7760]	= "SH7760",
	[CPU_ST40RA]	= "ST40RA",	[CPU_ST40GX1]	= "ST40GX1",
	[CPU_SH4_202]	= "SH4-202",	[CPU_SH4_501]	= "SH4-501",
	[CPU_SH7770]	= "SH7770",	[CPU_SH7780]	= "SH7780",
	[CPU_SH7781]	= "SH7781",	[CPU_SH7343]	= "SH7343",
	[CPU_SH7785]	= "SH7785",	[CPU_SH7722]	= "SH7722",
	[CPU_SHX3]	= "SH-X3",	[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)
{
}
struct seq_operations cpuinfo_op = {
	.start	= c_start,
	.next	= c_next,
	.stop	= c_stop,
	.show	= show_cpuinfo,
};
#endif /* CONFIG_PROC_FS */
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>
1da177e4 LT	26	#include <asm/uaccess.h>
1da177e4 LT	27	#include <asm/io.h>
7a302a96	28	#include <asm/page.h>
1da177e4 LT	29	#include <asm/sections.h>
	30	#include <asm/irq.h>
	31	#include <asm/setup.h>
de02797a	32	#include <asm/clock.h>
01066625	33	#include <asm/mmu_context.h>
1da177e4	34
1da177e4	35	extern void * __rd_start, * __rd_end;
fa5da2f7	36
1da177e4 LT	37	/*
	38	* Machine setup..
	39	*/
	40
	41	/*
	42	* Initialize loops_per_jiffy as 10000000 (1000MIPS).
	43	* This value will be used at the very early stage of serial setup.
	44	* The bigger value means no problem.
	45	*/
2d4a73d5 PM	46	struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
	47	[0] = {
	48	.type = CPU_SH_NONE,
	49	.loops_per_jiffy = 10000000,
	50	},
	51	};
	52	EXPORT_SYMBOL(cpu_data);
82f81f47 PM	53
	54	/*
	55	* The machine vector. First entry in .machvec.init, or clobbered by
	56	* sh_mv= on the command line, prior to .machvec.init teardown.
	57	*/
fd8f20e8	58	struct sh_machine_vector sh_mv = { .mv_name = "generic", };
82f81f47	59
2c7834a6	60	#ifdef CONFIG_VT
1da177e4	61	struct screen_info screen_info;
2c7834a6	62	#endif
1da177e4	63
1da177e4 LT	64	extern int root_mountflags;
1da177e4 LT	65
1da177e4 LT	66	/*
	67	* This is set up by the setup-routine at boot-time
	68	*/
	69	#define PARAM ((unsigned char *)empty_zero_page)
	70
	71	#define MOUNT_ROOT_RDONLY ((unsigned long ) (PARAM+0x000))
	72	#define RAMDISK_FLAGS ((unsigned long ) (PARAM+0x004))
	73	#define ORIG_ROOT_DEV ((unsigned long ) (PARAM+0x008))
	74	#define LOADER_TYPE ((unsigned long ) (PARAM+0x00c))
	75	#define INITRD_START ((unsigned long ) (PARAM+0x010))
	76	#define INITRD_SIZE ((unsigned long ) (PARAM+0x014))
	77	/* ... */
	78	#define COMMAND_LINE ((char *) (PARAM+0x100))
	79
65463b73	80	#define RAMDISK_IMAGE_START_MASK 0x07FF
1da177e4	81	#define RAMDISK_PROMPT_FLAG 0x8000
65463b73	82	#define RAMDISK_LOAD_FLAG 0x4000
1da177e4	83
53c82622	84	static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
1da177e4	85
2c7834a6 PM	86	static struct resource code_resource = { .name = "Kernel code", };
2c7834a6 PM	87	static struct resource data_resource = { .name = "Kernel data", };
1da177e4	88
98d877c4 PM	89	unsigned long memory_start;
	90	EXPORT_SYMBOL(memory_start);
	91
	92	unsigned long memory_end;
	93	EXPORT_SYMBOL(memory_end);
1da177e4	94
9655ad03	95	static int __init early_parse_mem(char *p)
1da177e4	96	{
9655ad03	97	unsigned long size;
1da177e4 LT	98
1da177e4 LT	99	memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
9655ad03 PM	100	size = memparse(p, &p);
9655ad03 PM	101	memory_end = memory_start + size;
2c7834a6	102
1da177e4 LT	103	return 0;
1da177e4 LT	104	}
9655ad03	105	early_param("mem", early_parse_mem);
1da177e4	106
01066625 PM	107	/*
	108	* Register fully available low RAM pages with the bootmem allocator.
	109	*/
	110	static void __init register_bootmem_low_pages(void)
1da177e4	111	{
01066625	112	unsigned long curr_pfn, last_pfn, pages;
b641fe01	113
1da177e4	114	/*
01066625	115	* We are rounding up the start address of usable memory:
1da177e4	116	*/
01066625	117	curr_pfn = PFN_UP(__MEMORY_START);
1da177e4 LT	118
1da177e4 LT	119	/*
01066625	120	* ... and at the end of the usable range downwards:
1da177e4	121	*/
01066625	122	last_pfn = PFN_DOWN(__pa(memory_end));
1da177e4	123
01066625 PM	124	if (last_pfn > max_low_pfn)
	125	last_pfn = max_low_pfn;
	126
	127	pages = last_pfn - curr_pfn;
	128	free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
	129	}
	130
7d7712a3 BW	131	#ifdef CONFIG_KEXEC
	132	static void __init reserve_crashkernel(void)
	133	{
	134	unsigned long long free_mem;
	135	unsigned long long crash_size, crash_base;
	136	int ret;
	137
	138	free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
	139
	140	ret = parse_crashkernel(boot_command_line, free_mem,
	141	&crash_size, &crash_base);
	142	if (ret == 0 && crash_size) {
	143	if (crash_base > 0) {
	144	printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
	145	"for crashkernel (System RAM: %ldMB)\n",
	146	(unsigned long)(crash_size >> 20),
	147	(unsigned long)(crash_base >> 20),
	148	(unsigned long)(free_mem >> 20));
	149	crashk_res.start = crash_base;
	150	crashk_res.end = crash_base + crash_size - 1;
	151	reserve_bootmem(crash_base, crash_size);
	152	} else
	153	printk(KERN_INFO "crashkernel reservation failed - "
	154	"you have to specify a base address\n");
	155	}
	156	}
	157	#else
	158	static inline void __init reserve_crashkernel(void)
	159	{}
	160	#endif
	161
2826fa61	162	void __init setup_bootmem_allocator(unsigned long free_pfn)
01066625 PM	163	{
01066625 PM	164	unsigned long bootmap_size;
1da177e4 LT	165
	166	/*
	167	* Find a proper area for the bootmem bitmap. After this
	168	* bootstrap step all allocations (until the page allocator
	169	* is intact) must be done via bootmem_alloc().
	170	*/
2826fa61	171	bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
01066625	172	min_low_pfn, max_low_pfn);
1da177e4	173
dfbb9042	174	add_active_range(0, min_low_pfn, max_low_pfn);
01066625	175	register_bootmem_low_pages();
1da177e4	176
01066625	177	node_set_online(0);
b641fe01	178
1da177e4 LT	179	/*
	180	* Reserve the kernel text and
	181	* Reserve the bootmem bitmap. We do this in two steps (first step
	182	* was init_bootmem()), because this catches the (definitely buggy)
	183	* case of us accidentally initializing the bootmem allocator with
	184	* an invalid RAM area.
	185	*/
01066625	186	reserve_bootmem(__MEMORY_START+PAGE_SIZE,
2826fa61	187	(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
1da177e4 LT	188
	189	/*
	190	* reserve physical page 0 - it's a special BIOS page on many boxes,
	191	* enabling clean reboots, SMP operation, laptop functions.
	192	*/
01066625	193	reserve_bootmem(__MEMORY_START, PAGE_SIZE);
1da177e4	194
2826fa61 PM	195	sparse_memory_present_with_active_regions(0);
2826fa61 PM	196
1da177e4	197	#ifdef CONFIG_BLK_DEV_INITRD
65463b73 PM	198	ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
65463b73 PM	199	if (&__rd_start != &__rd_end) {
1da177e4	200	LOADER_TYPE = 1;
41504c39 PM	201	INITRD_START = PHYSADDR((unsigned long)&__rd_start) -
	202	__MEMORY_START;
	203	INITRD_SIZE = (unsigned long)&__rd_end -
	204	(unsigned long)&__rd_start;
65463b73	205	}
1da177e4 LT	206
	207	if (LOADER_TYPE && INITRD_START) {
	208	if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
01066625 PM	209	reserve_bootmem(INITRD_START + __MEMORY_START,
01066625 PM	210	INITRD_SIZE);
41504c39 PM	211	initrd_start = INITRD_START + PAGE_OFFSET +
41504c39 PM	212	__MEMORY_START;
1da177e4 LT	213	initrd_end = initrd_start + INITRD_SIZE;
	214	} else {
	215	printk("initrd extends beyond end of memory "
	216	"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
	217	INITRD_START + INITRD_SIZE,
	218	max_low_pfn << PAGE_SHIFT);
	219	initrd_start = 0;
	220	}
	221	}
	222	#endif
7d7712a3 BW	223
7d7712a3 BW	224	reserve_crashkernel();
01066625 PM	225	}
	226
	227	#ifndef CONFIG_NEED_MULTIPLE_NODES
	228	static void __init setup_memory(void)
	229	{
	230	unsigned long start_pfn;
	231
	232	/*
	233	* Partially used pages are not usable - thus
	234	* we are rounding upwards:
	235	*/
	236	start_pfn = PFN_UP(__pa(_end));
	237	setup_bootmem_allocator(start_pfn);
	238	}
	239	#else
	240	extern void __init setup_memory(void);
	241	#endif
	242
	243	void __init setup_arch(char **cmdline_p)
	244	{
	245	enable_mmu();
	246
01066625 PM	247	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
	248
	249	#ifdef CONFIG_BLK_DEV_RAM
	250	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
	251	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
	252	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
	253	#endif
	254
	255	if (!MOUNT_ROOT_RDONLY)
	256	root_mountflags &= ~MS_RDONLY;
	257	init_mm.start_code = (unsigned long) _text;
	258	init_mm.end_code = (unsigned long) _etext;
	259	init_mm.end_data = (unsigned long) _edata;
	260	init_mm.brk = (unsigned long) _end;
	261
	262	code_resource.start = virt_to_phys(_text);
	263	code_resource.end = virt_to_phys(_etext)-1;
	264	data_resource.start = virt_to_phys(_etext);
	265	data_resource.end = virt_to_phys(_edata)-1;
	266
9655ad03 PM	267	memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
	268	memory_end = memory_start + __MEMORY_SIZE;
	269
ba36197c PM	270	#ifdef CONFIG_CMDLINE_BOOL
	271	strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
	272	#else
	273	strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
	274	#endif
9655ad03	275
ba36197c PM	276	/* Save unparsed command line copy for /proc/cmdline */
ba36197c PM	277	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
9655ad03 PM	278	*cmdline_p = command_line;
9655ad03 PM	279
01066625 PM	280	parse_early_param();
01066625 PM	281
9655ad03	282	sh_mv_setup();
01066625 PM	283
	284	/*
	285	* Find the highest page frame number we have available
	286	*/
	287	max_pfn = PFN_DOWN(__pa(memory_end));
	288
	289	/*
	290	* Determine low and high memory ranges:
	291	*/
	292	max_low_pfn = max_pfn;
	293	min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
	294
	295	nodes_clear(node_online_map);
dfbb9042 PM	296
dfbb9042 PM	297	/* Setup bootmem with available RAM */
01066625	298	setup_memory();
01066625	299	sparse_init();
1da177e4 LT	300
	301	#ifdef CONFIG_DUMMY_CONSOLE
	302	conswitchp = &dummy_con;
	303	#endif
	304
	305	/* Perform the machine specific initialisation */
2c7834a6 PM	306	if (likely(sh_mv.mv_setup))
2c7834a6 PM	307	sh_mv.mv_setup(cmdline_p);
1da177e4	308
dfbb9042	309	paging_init();
0016a126 PM	310
	311	#ifdef CONFIG_SMP
	312	plat_smp_setup();
	313	#endif
dfbb9042	314	}
1da177e4	315
1da177e4	316	static const char *cpu_name[] = {
b552c7e8	317	[CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
e5723e0e PM	318	[CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
	319	[CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
	320	[CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
3ea6bc3d	321	[CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
e5723e0e PM	322	[CPU_SH7729] = "SH7729", [CPU_SH7750] = "SH7750",
	323	[CPU_SH7750S] = "SH7750S", [CPU_SH7750R] = "SH7750R",
	324	[CPU_SH7751] = "SH7751", [CPU_SH7751R] = "SH7751R",
870e8a24	325	[CPU_SH7760] = "SH7760",
e5723e0e PM	326	[CPU_ST40RA] = "ST40RA", [CPU_ST40GX1] = "ST40GX1",
	327	[CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
	328	[CPU_SH7770] = "SH7770", [CPU_SH7780] = "SH7780",
	329	[CPU_SH7781] = "SH7781", [CPU_SH7343] = "SH7343",
41504c39	330	[CPU_SH7785] = "SH7785", [CPU_SH7722] = "SH7722",
2b1bd1ac	331	[CPU_SHX3] = "SH-X3", [CPU_SH_NONE] = "Unknown"
1da177e4 LT	332	};
1da177e4 LT	333
11c19656	334	const char get_cpu_subtype(struct sh_cpuinfo c)
1da177e4	335	{
11c19656	336	return cpu_name[c->type];
1da177e4 LT	337	}
	338
	339	#ifdef CONFIG_PROC_FS
2220d164	340	/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
1da177e4	341	static const char *cpu_flags[] = {
2220d164	342	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
074f98df	343	"ptea", "llsc", "l2", "op32", NULL
1da177e4 LT	344	};
1da177e4 LT	345
11c19656	346	static void show_cpuflags(struct seq_file m, struct sh_cpuinfo c)
1da177e4 LT	347	{
	348	unsigned long i;
	349
	350	seq_printf(m, "cpu flags\t:");
	351
11c19656	352	if (!c->flags) {
1da177e4 LT	353	seq_printf(m, " %s\n", cpu_flags[0]);
	354	return;
	355	}
	356
de02797a	357	for (i = 0; cpu_flags[i]; i++)
11c19656	358	if ((c->flags & (1 << i)))
1da177e4 LT	359	seq_printf(m, " %s", cpu_flags[i+1]);
	360
	361	seq_printf(m, "\n");
	362	}
	363
2c7834a6 PM	364	static void show_cacheinfo(struct seq_file m, const char type,
2c7834a6 PM	365	struct cache_info info)
1da177e4 LT	366	{
	367	unsigned int cache_size;
	368
	369	cache_size = info.ways * info.sets * info.linesz;
	370
de02797a PM	371	seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
de02797a PM	372	type, cache_size >> 10, info.ways);
1da177e4 LT	373	}
	374
	375	/*
	376	* Get CPU information for use by the procfs.
	377	*/
	378	static int show_cpuinfo(struct seq_file m, void v)
	379	{
11c19656 PM	380	struct sh_cpuinfo *c = v;
	381	unsigned int cpu = c - cpu_data;
	382
	383	if (!cpu_online(cpu))
	384	return 0;
1da177e4	385
11c19656	386	if (cpu == 0)
1da177e4 LT	387	seq_printf(m, "machine\t\t: %s\n", get_system_type());
	388
	389	seq_printf(m, "processor\t: %d\n", cpu);
96b644bd	390	seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
11c19656	391	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
1da177e4	392
11c19656	393	show_cpuflags(m, c);
1da177e4 LT	394
	395	seq_printf(m, "cache type\t: ");
	396
	397	/*
	398	* Check for what type of cache we have, we support both the
	399	* unified cache on the SH-2 and SH-3, as well as the harvard
	400	* style cache on the SH-4.
	401	*/
11c19656	402	if (c->icache.flags & SH_CACHE_COMBINED) {
1da177e4	403	seq_printf(m, "unified\n");
11c19656	404	show_cacheinfo(m, "cache", c->icache);
1da177e4 LT	405	} else {
1da177e4 LT	406	seq_printf(m, "split (harvard)\n");
11c19656 PM	407	show_cacheinfo(m, "icache", c->icache);
11c19656 PM	408	show_cacheinfo(m, "dcache", c->dcache);
1da177e4 LT	409	}
1da177e4 LT	410
72c35543	411	/* Optional secondary cache */
11c19656 PM	412	if (c->flags & CPU_HAS_L2_CACHE)
11c19656 PM	413	show_cacheinfo(m, "scache", c->scache);
72c35543	414
1da177e4	415	seq_printf(m, "bogomips\t: %lu.%02lu\n",
11c19656 PM	416	c->loops_per_jiffy/(500000/HZ),
11c19656 PM	417	(c->loops_per_jiffy/(5000/HZ)) % 100);
1da177e4	418
db62e5bd	419	return 0;
1da177e4 LT	420	}
1da177e4 LT	421
1da177e4 LT	422	static void c_start(struct seq_file m, loff_t *pos)
	423	{
	424	return pos < NR_CPUS ? cpu_data + pos : NULL;
	425	}
	426	static void c_next(struct seq_file m, void v, loff_t pos)
	427	{
	428	++*pos;
	429	return c_start(m, pos);
	430	}
	431	static void c_stop(struct seq_file m, void v)
	432	{
	433	}
	434	struct seq_operations cpuinfo_op = {
	435	.start = c_start,
	436	.next = c_next,
	437	.stop = c_stop,
	438	.show = show_cpuinfo,
	439	};
	440	#endif /* CONFIG_PROC_FS */