[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 <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,
					BOOTMEM_DEFAULT);
		} 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,
		BOOTMEM_DEFAULT);

	/*
	 * 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, BOOTMEM_DEFAULT);

	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, BOOTMEM_DEFAULT);
			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 */
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>
cd01204b	29	#include <asm/elf.h>
1da177e4 LT	30	#include <asm/sections.h>
	31	#include <asm/irq.h>
	32	#include <asm/setup.h>
de02797a	33	#include <asm/clock.h>
01066625	34	#include <asm/mmu_context.h>
1da177e4	35
1da177e4 LT	36	/*
	37	* Initialize loops_per_jiffy as 10000000 (1000MIPS).
	38	* This value will be used at the very early stage of serial setup.
	39	* The bigger value means no problem.
	40	*/
2d4a73d5 PM	41	struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
	42	[0] = {
	43	.type = CPU_SH_NONE,
	44	.loops_per_jiffy = 10000000,
	45	},
	46	};
	47	EXPORT_SYMBOL(cpu_data);
82f81f47 PM	48
	49	/*
	50	* The machine vector. First entry in .machvec.init, or clobbered by
	51	* sh_mv= on the command line, prior to .machvec.init teardown.
	52	*/
fd8f20e8	53	struct sh_machine_vector sh_mv = { .mv_name = "generic", };
82f81f47	54
2c7834a6	55	#ifdef CONFIG_VT
1da177e4	56	struct screen_info screen_info;
2c7834a6	57	#endif
1da177e4	58
1da177e4 LT	59	extern int root_mountflags;
1da177e4 LT	60
65463b73	61	#define RAMDISK_IMAGE_START_MASK 0x07FF
1da177e4	62	#define RAMDISK_PROMPT_FLAG 0x8000
65463b73	63	#define RAMDISK_LOAD_FLAG 0x4000
1da177e4	64
53c82622	65	static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
1da177e4	66
69d1ef4c PM	67	static struct resource code_resource = {
	68	.name = "Kernel code",
	69	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	70	};
	71
	72	static struct resource data_resource = {
	73	.name = "Kernel data",
	74	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
	75	};
1da177e4	76
98d877c4 PM	77	unsigned long memory_start;
98d877c4 PM	78	EXPORT_SYMBOL(memory_start);
7e5186ea	79	unsigned long memory_end = 0;
98d877c4	80	EXPORT_SYMBOL(memory_end);
1da177e4	81
cd01204b PM	82	int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
cd01204b PM	83
9655ad03	84	static int __init early_parse_mem(char *p)
1da177e4	85	{
9655ad03	86	unsigned long size;
1da177e4	87
d02b08f6	88	memory_start = (unsigned long)__va(__MEMORY_START);
9655ad03	89	size = memparse(p, &p);
80a68a43 SM	90
	91	if (size > __MEMORY_SIZE) {
	92	static char msg[] __initdata = KERN_ERR
	93	"Using mem= to increase the size of kernel memory "
	94	"is not allowed.\n"
	95	" Recompile the kernel with the correct value for "
	96	"CONFIG_MEMORY_SIZE.\n";
	97	printk(msg);
	98	return 0;
	99	}
	100
9655ad03	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;
72a7fe39 BW	151	reserve_bootmem(crash_base, crash_size,
72a7fe39 BW	152	BOOTMEM_DEFAULT);
7d7712a3 BW	153	} else
	154	printk(KERN_INFO "crashkernel reservation failed - "
	155	"you have to specify a base address\n");
	156	}
	157	}
	158	#else
	159	static inline void __init reserve_crashkernel(void)
	160	{}
	161	#endif
	162
2826fa61	163	void __init setup_bootmem_allocator(unsigned long free_pfn)
01066625 PM	164	{
01066625 PM	165	unsigned long bootmap_size;
1da177e4 LT	166
	167	/*
	168	* Find a proper area for the bootmem bitmap. After this
	169	* bootstrap step all allocations (until the page allocator
	170	* is intact) must be done via bootmem_alloc().
	171	*/
2826fa61	172	bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
01066625	173	min_low_pfn, max_low_pfn);
1da177e4	174
dfbb9042	175	add_active_range(0, min_low_pfn, max_low_pfn);
01066625	176	register_bootmem_low_pages();
1da177e4	177
01066625	178	node_set_online(0);
b641fe01	179
1da177e4 LT	180	/*
	181	* Reserve the kernel text and
	182	* Reserve the bootmem bitmap. We do this in two steps (first step
	183	* was init_bootmem()), because this catches the (definitely buggy)
	184	* case of us accidentally initializing the bootmem allocator with
	185	* an invalid RAM area.
	186	*/
01066625	187	reserve_bootmem(__MEMORY_START+PAGE_SIZE,
72a7fe39 BW	188	(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START,
72a7fe39 BW	189	BOOTMEM_DEFAULT);
1da177e4 LT	190
	191	/*
	192	* reserve physical page 0 - it's a special BIOS page on many boxes,
	193	* enabling clean reboots, SMP operation, laptop functions.
	194	*/
72a7fe39	195	reserve_bootmem(__MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT);
1da177e4	196
2826fa61 PM	197	sparse_memory_present_with_active_regions(0);
2826fa61 PM	198
1da177e4	199	#ifdef CONFIG_BLK_DEV_INITRD
3f9654f0	200	ROOT_DEV = Root_RAM0;
1da177e4 LT	201
	202	if (LOADER_TYPE && INITRD_START) {
	203	if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
01066625	204	reserve_bootmem(INITRD_START + __MEMORY_START,
72a7fe39	205	INITRD_SIZE, BOOTMEM_DEFAULT);
41504c39 PM	206	initrd_start = INITRD_START + PAGE_OFFSET +
41504c39 PM	207	__MEMORY_START;
1da177e4 LT	208	initrd_end = initrd_start + INITRD_SIZE;
	209	} else {
	210	printk("initrd extends beyond end of memory "
	211	"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
	212	INITRD_START + INITRD_SIZE,
	213	max_low_pfn << PAGE_SHIFT);
	214	initrd_start = 0;
	215	}
	216	}
	217	#endif
7d7712a3 BW	218
7d7712a3 BW	219	reserve_crashkernel();
01066625 PM	220	}
	221
	222	#ifndef CONFIG_NEED_MULTIPLE_NODES
	223	static void __init setup_memory(void)
	224	{
	225	unsigned long start_pfn;
	226
	227	/*
	228	* Partially used pages are not usable - thus
	229	* we are rounding upwards:
	230	*/
	231	start_pfn = PFN_UP(__pa(_end));
	232	setup_bootmem_allocator(start_pfn);
	233	}
	234	#else
	235	extern void __init setup_memory(void);
	236	#endif
	237
	238	void __init setup_arch(char **cmdline_p)
	239	{
	240	enable_mmu();
	241
01066625 PM	242	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
	243
	244	#ifdef CONFIG_BLK_DEV_RAM
	245	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
	246	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
	247	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
	248	#endif
	249
	250	if (!MOUNT_ROOT_RDONLY)
	251	root_mountflags &= ~MS_RDONLY;
	252	init_mm.start_code = (unsigned long) _text;
	253	init_mm.end_code = (unsigned long) _etext;
	254	init_mm.end_data = (unsigned long) _edata;
	255	init_mm.brk = (unsigned long) _end;
	256
	257	code_resource.start = virt_to_phys(_text);
	258	code_resource.end = virt_to_phys(_etext)-1;
	259	data_resource.start = virt_to_phys(_etext);
	260	data_resource.end = virt_to_phys(_edata)-1;
	261
d02b08f6	262	memory_start = (unsigned long)__va(__MEMORY_START);
7e5186ea PM	263	if (!memory_end)
7e5186ea PM	264	memory_end = memory_start + __MEMORY_SIZE;
9655ad03	265
ba36197c PM	266	#ifdef CONFIG_CMDLINE_BOOL
	267	strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
	268	#else
	269	strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
	270	#endif
9655ad03	271
ba36197c PM	272	/* Save unparsed command line copy for /proc/cmdline */
ba36197c PM	273	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
9655ad03 PM	274	*cmdline_p = command_line;
9655ad03 PM	275
01066625 PM	276	parse_early_param();
01066625 PM	277
9655ad03	278	sh_mv_setup();
01066625 PM	279
	280	/*
	281	* Find the highest page frame number we have available
	282	*/
	283	max_pfn = PFN_DOWN(__pa(memory_end));
	284
	285	/*
	286	* Determine low and high memory ranges:
	287	*/
	288	max_low_pfn = max_pfn;
	289	min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
	290
	291	nodes_clear(node_online_map);
dfbb9042 PM	292
dfbb9042 PM	293	/* Setup bootmem with available RAM */
01066625	294	setup_memory();
01066625	295	sparse_init();
1da177e4 LT	296
	297	#ifdef CONFIG_DUMMY_CONSOLE
	298	conswitchp = &dummy_con;
	299	#endif
	300
	301	/* Perform the machine specific initialisation */
2c7834a6 PM	302	if (likely(sh_mv.mv_setup))
2c7834a6 PM	303	sh_mv.mv_setup(cmdline_p);
1da177e4	304
dfbb9042	305	paging_init();
0016a126 PM	306
	307	#ifdef CONFIG_SMP
	308	plat_smp_setup();
	309	#endif
dfbb9042	310	}
1da177e4	311
1da177e4	312	static const char *cpu_name[] = {
a8f67f4b	313	[CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
b552c7e8	314	[CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
e5723e0e PM	315	[CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
	316	[CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
	317	[CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
3ea6bc3d	318	[CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
31a49c4b YS	319	[CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
	320	[CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
	321	[CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
	322	[CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
e5723e0e	323	[CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
7d740a06 YS	324	[CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
	325	[CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
	326	[CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
	327	[CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
c2672f62 PM	328	[CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
c2672f62 PM	329	[CPU_SH_NONE] = "Unknown"
1da177e4 LT	330	};
1da177e4 LT	331
11c19656	332	const char get_cpu_subtype(struct sh_cpuinfo c)
1da177e4	333	{
11c19656	334	return cpu_name[c->type];
1da177e4 LT	335	}
	336
	337	#ifdef CONFIG_PROC_FS
2220d164	338	/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
1da177e4	339	static const char *cpu_flags[] = {
2220d164	340	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
074f98df	341	"ptea", "llsc", "l2", "op32", NULL
1da177e4 LT	342	};
1da177e4 LT	343
11c19656	344	static void show_cpuflags(struct seq_file m, struct sh_cpuinfo c)
1da177e4 LT	345	{
	346	unsigned long i;
	347
	348	seq_printf(m, "cpu flags\t:");
	349
11c19656	350	if (!c->flags) {
1da177e4 LT	351	seq_printf(m, " %s\n", cpu_flags[0]);
	352	return;
	353	}
	354
de02797a	355	for (i = 0; cpu_flags[i]; i++)
11c19656	356	if ((c->flags & (1 << i)))
1da177e4 LT	357	seq_printf(m, " %s", cpu_flags[i+1]);
	358
	359	seq_printf(m, "\n");
	360	}
	361
2c7834a6 PM	362	static void show_cacheinfo(struct seq_file m, const char type,
2c7834a6 PM	363	struct cache_info info)
1da177e4 LT	364	{
	365	unsigned int cache_size;
	366
	367	cache_size = info.ways * info.sets * info.linesz;
	368
de02797a PM	369	seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
de02797a PM	370	type, cache_size >> 10, info.ways);
1da177e4 LT	371	}
	372
	373	/*
	374	* Get CPU information for use by the procfs.
	375	*/
	376	static int show_cpuinfo(struct seq_file m, void v)
	377	{
11c19656 PM	378	struct sh_cpuinfo *c = v;
	379	unsigned int cpu = c - cpu_data;
	380
	381	if (!cpu_online(cpu))
	382	return 0;
1da177e4	383
11c19656	384	if (cpu == 0)
1da177e4 LT	385	seq_printf(m, "machine\t\t: %s\n", get_system_type());
	386
	387	seq_printf(m, "processor\t: %d\n", cpu);
96b644bd	388	seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
11c19656	389	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
1da177e4	390
11c19656	391	show_cpuflags(m, c);
1da177e4 LT	392
	393	seq_printf(m, "cache type\t: ");
	394
	395	/*
	396	* Check for what type of cache we have, we support both the
	397	* unified cache on the SH-2 and SH-3, as well as the harvard
	398	* style cache on the SH-4.
	399	*/
11c19656	400	if (c->icache.flags & SH_CACHE_COMBINED) {
1da177e4	401	seq_printf(m, "unified\n");
11c19656	402	show_cacheinfo(m, "cache", c->icache);
1da177e4 LT	403	} else {
1da177e4 LT	404	seq_printf(m, "split (harvard)\n");
11c19656 PM	405	show_cacheinfo(m, "icache", c->icache);
11c19656 PM	406	show_cacheinfo(m, "dcache", c->dcache);
1da177e4 LT	407	}
1da177e4 LT	408
72c35543	409	/* Optional secondary cache */
11c19656 PM	410	if (c->flags & CPU_HAS_L2_CACHE)
11c19656 PM	411	show_cacheinfo(m, "scache", c->scache);
72c35543	412
1da177e4	413	seq_printf(m, "bogomips\t: %lu.%02lu\n",
11c19656 PM	414	c->loops_per_jiffy/(500000/HZ),
11c19656 PM	415	(c->loops_per_jiffy/(5000/HZ)) % 100);
1da177e4	416
db62e5bd	417	return 0;
1da177e4 LT	418	}
1da177e4 LT	419
1da177e4 LT	420	static void c_start(struct seq_file m, loff_t *pos)
	421	{
	422	return pos < NR_CPUS ? cpu_data + pos : NULL;
	423	}
	424	static void c_next(struct seq_file m, void v, loff_t pos)
	425	{
	426	++*pos;
	427	return c_start(m, pos);
	428	}
	429	static void c_stop(struct seq_file m, void v)
	430	{
	431	}
773c7bd6	432	const struct seq_operations cpuinfo_op = {
1da177e4 LT	433	.start = c_start,
	434	.next = c_next,
	435	.stop = c_stop,
	436	.show = show_cpuinfo,
	437	};
	438	#endif /* CONFIG_PROC_FS */