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

/*
 *  linux/arch/sparc/kernel/setup.c
 *
 *  Copyright (C) 1995  David S. Miller (davem@caip.rutgers.edu)
 *  Copyright (C) 2000  Anton Blanchard (anton@samba.org)
 */

#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/initrd.h>
#include <asm/smp.h>
#include <linux/user.h>
#include <linux/screen_info.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/syscalls.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/console.h>
#include <linux/spinlock.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/kdebug.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/oplib.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/traps.h>
#include <asm/vaddrs.h>
#include <asm/mbus.h>
#include <asm/idprom.h>
#include <asm/machines.h>
#include <asm/cpudata.h>
#include <asm/setup.h>

struct screen_info screen_info = {
	0, 0,			/* orig-x, orig-y */
	0,			/* unused */
	0,			/* orig-video-page */
	0,			/* orig-video-mode */
	128,			/* orig-video-cols */
	0,0,0,			/* ega_ax, ega_bx, ega_cx */
	54,			/* orig-video-lines */
	0,                      /* orig-video-isVGA */
	16                      /* orig-video-points */
};

/* Typing sync at the prom prompt calls the function pointed to by
 * romvec->pv_synchook which I set to the following function.
 * This should sync all filesystems and return, for now it just
 * prints out pretty messages and returns.
 */

extern unsigned long trapbase;

/* Pretty sick eh? */
static void prom_sync_me(void)
{
	unsigned long prom_tbr, flags;

	/* XXX Badly broken. FIX! - Anton */
	local_irq_save(flags);
	__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
			     "nop\n\t"
			     "nop\n\t"
			     "nop\n\t" : : "r" (&trapbase));

	prom_printf("PROM SYNC COMMAND...\n");
	show_free_areas();
	if(current->pid != 0) {
		local_irq_enable();
		sys_sync();
		local_irq_disable();
	}
	prom_printf("Returning to prom\n");

	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
			     "nop\n\t"
			     "nop\n\t"
			     "nop\n\t" : : "r" (prom_tbr));
	local_irq_restore(flags);

	return;
}

static unsigned int boot_flags __initdata = 0;
#define BOOTME_DEBUG  0x1

/* Exported for mm/init.c:paging_init. */
unsigned long cmdline_memory_size __initdata = 0;

static void
prom_console_write(struct console *con, const char *s, unsigned n)
{
	prom_write(s, n);
}

static struct console prom_debug_console = {
	.name =		"debug",
	.write =	prom_console_write,
	.flags =	CON_PRINTBUFFER,
	.index =	-1,
};

/* 
 * Process kernel command line switches that are specific to the
 * SPARC or that require special low-level processing.
 */
static void __init process_switch(char c)
{
	switch (c) {
	case 'd':
		boot_flags |= BOOTME_DEBUG;
		break;
	case 's':
		break;
	case 'h':
		prom_printf("boot_flags_init: Halt!\n");
		prom_halt();
		break;
	case 'p':
		/* Use PROM debug console. */
		register_console(&prom_debug_console);
		break;
	default:
		printk("Unknown boot switch (-%c)\n", c);
		break;
	}
}

static void __init boot_flags_init(char *commands)
{
	while (*commands) {
		/* Move to the start of the next "argument". */
		while (*commands && *commands == ' ')
			commands++;

		/* Process any command switches, otherwise skip it. */
		if (*commands == '\0')
			break;
		if (*commands == '-') {
			commands++;
			while (*commands && *commands != ' ')
				process_switch(*commands++);
			continue;
		}
		if (!strncmp(commands, "mem=", 4)) {
			/*
			 * "mem=XXX[kKmM] overrides the PROM-reported
			 * memory size.
			 */
			cmdline_memory_size = simple_strtoul(commands + 4,
						     &commands, 0);
			if (*commands == 'K' || *commands == 'k') {
				cmdline_memory_size <<= 10;
				commands++;
			} else if (*commands=='M' || *commands=='m') {
				cmdline_memory_size <<= 20;
				commands++;
			}
		}
		while (*commands && *commands != ' ')
			commands++;
	}
}

/* This routine will in the future do all the nasty prom stuff
 * to probe for the mmu type and its parameters, etc. This will
 * also be where SMP things happen.
 */

extern void sun4c_probe_vac(void);
extern char cputypval;
extern unsigned long start, end;

extern unsigned short root_flags;
extern unsigned short root_dev;
extern unsigned short ram_flags;
#define RAMDISK_IMAGE_START_MASK	0x07FF
#define RAMDISK_PROMPT_FLAG		0x8000
#define RAMDISK_LOAD_FLAG		0x4000

extern int root_mountflags;

char reboot_command[COMMAND_LINE_SIZE];
enum sparc_cpu sparc_cpu_model;

struct tt_entry *sparc_ttable;

struct pt_regs fake_swapper_regs;

void __init setup_arch(char **cmdline_p)
{
	int i;
	unsigned long highest_paddr;

	sparc_ttable = (struct tt_entry *) &start;

	/* Initialize PROM console and command line. */
	*cmdline_p = prom_getbootargs();
	strcpy(boot_command_line, *cmdline_p);

	/* Set sparc_cpu_model */
	sparc_cpu_model = sun_unknown;
	if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
	if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
	if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
	if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; }  /* CP-1200 with PROM 2.30 -E */
	if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
	if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
	if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }

	printk("ARCH: ");
	switch(sparc_cpu_model) {
	case sun4:
		printk("SUN4\n");
		break;
	case sun4c:
		printk("SUN4C\n");
		break;
	case sun4m:
		printk("SUN4M\n");
		break;
	case sun4d:
		printk("SUN4D\n");
		break;
	case sun4e:
		printk("SUN4E\n");
		break;
	case sun4u:
		printk("SUN4U\n");
		break;
	default:
		printk("UNKNOWN!\n");
		break;
	};

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#elif defined(CONFIG_PROM_CONSOLE)
	conswitchp = &prom_con;
#endif
	boot_flags_init(*cmdline_p);

	idprom_init();
	if (ARCH_SUN4C)
		sun4c_probe_vac();
	load_mmu();

	phys_base = 0xffffffffUL;
	highest_paddr = 0UL;
	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
		unsigned long top;

		if (sp_banks[i].base_addr < phys_base)
			phys_base = sp_banks[i].base_addr;
		top = sp_banks[i].base_addr +
			sp_banks[i].num_bytes;
		if (highest_paddr < top)
			highest_paddr = top;
	}
	pfn_base = phys_base >> PAGE_SHIFT;

	if (!root_flags)
		root_mountflags &= ~MS_RDONLY;
	ROOT_DEV = old_decode_dev(root_dev);
#ifdef CONFIG_BLK_DEV_RAM
	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);	
#endif

	prom_setsync(prom_sync_me);

	if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && 
	   ((*(short *)linux_dbvec) != -1)) {
		printk("Booted under KADB. Syncing trap table.\n");
		(*(linux_dbvec->teach_debugger))();
	}

	init_mm.context = (unsigned long) NO_CONTEXT;
	init_task.thread.kregs = &fake_swapper_regs;

	paging_init();

	smp_setup_cpu_possible_map();
}

extern char *sparc_cpu_type;
extern char *sparc_fpu_type;

static int ncpus_probed;

static int show_cpuinfo(struct seq_file *m, void *__unused)
{
	seq_printf(m,
		   "cpu\t\t: %s\n"
		   "fpu\t\t: %s\n"
		   "promlib\t\t: Version %d Revision %d\n"
		   "prom\t\t: %d.%d\n"
		   "type\t\t: %s\n"
		   "ncpus probed\t: %d\n"
		   "ncpus active\t: %d\n"
#ifndef CONFIG_SMP
		   "CPU0Bogo\t: %lu.%02lu\n"
		   "CPU0ClkTck\t: %ld\n"
#endif
		   ,
		   sparc_cpu_type ? sparc_cpu_type : "undetermined",
		   sparc_fpu_type ? sparc_fpu_type : "undetermined",
		   romvec->pv_romvers,
		   prom_rev,
		   romvec->pv_printrev >> 16,
		   romvec->pv_printrev & 0xffff,
		   &cputypval,
		   ncpus_probed,
		   num_online_cpus()
#ifndef CONFIG_SMP
		   , cpu_data(0).udelay_val/(500000/HZ),
		   (cpu_data(0).udelay_val/(5000/HZ)) % 100,
		   cpu_data(0).clock_tick
#endif
		);

#ifdef CONFIG_SMP
	smp_bogo(m);
#endif
	mmu_info(m);
#ifdef CONFIG_SMP
	smp_info(m);
#endif
	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	/* The pointer we are returning is arbitrary,
	 * it just has to be non-NULL and not IS_ERR
	 * in the success case.
	 */
	return *pos == 0 ? &c_start : 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,
};

extern int stop_a_enabled;

void sun_do_break(void)
{
	if (!stop_a_enabled)
		return;

	printk("\n");
	flush_user_windows();

	prom_cmdline();
}

int stop_a_enabled = 1;

static int __init topology_init(void)
{
	int i, ncpus, err;

	/* Count the number of physically present processors in
	 * the machine, even on uniprocessor, so that /proc/cpuinfo
	 * output is consistent with 2.4.x
	 */
	ncpus = 0;
	while (!cpu_find_by_instance(ncpus, NULL, NULL))
		ncpus++;
	ncpus_probed = ncpus;

	err = 0;
	for_each_online_cpu(i) {
		struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
		if (!p)
			err = -ENOMEM;
		else
			register_cpu(p, i);
	}

	return err;
}

subsys_initcall(topology_init);
Commit	Line	Data
88278ca2	1	/*
1da177e4 LT	2	* linux/arch/sparc/kernel/setup.c
	3	*
	4	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	5	* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
	6	*/
	7
	8	#include <linux/errno.h>
	9	#include <linux/sched.h>
	10	#include <linux/kernel.h>
	11	#include <linux/mm.h>
	12	#include <linux/stddef.h>
	13	#include <linux/unistd.h>
	14	#include <linux/ptrace.h>
	15	#include <linux/slab.h>
	16	#include <linux/initrd.h>
	17	#include <asm/smp.h>
	18	#include <linux/user.h>
894673ee	19	#include <linux/screen_info.h>
1da177e4	20	#include <linux/delay.h>
1da177e4 LT	21	#include <linux/fs.h>
	22	#include <linux/seq_file.h>
	23	#include <linux/syscalls.h>
	24	#include <linux/kdev_t.h>
	25	#include <linux/major.h>
	26	#include <linux/string.h>
	27	#include <linux/init.h>
	28	#include <linux/interrupt.h>
	29	#include <linux/console.h>
	30	#include <linux/spinlock.h>
	31	#include <linux/root_dev.h>
a8cbdcea	32	#include <linux/cpu.h>
1eeb66a1	33	#include <linux/kdebug.h>
1da177e4	34
1da177e4 LT	35	#include <asm/system.h>
	36	#include <asm/io.h>
	37	#include <asm/processor.h>
	38	#include <asm/oplib.h>
	39	#include <asm/page.h>
	40	#include <asm/pgtable.h>
	41	#include <asm/traps.h>
	42	#include <asm/vaddrs.h>
1da177e4 LT	43	#include <asm/mbus.h>
	44	#include <asm/idprom.h>
	45	#include <asm/machines.h>
	46	#include <asm/cpudata.h>
	47	#include <asm/setup.h>
	48
	49	struct screen_info screen_info = {
	50	0, 0, /* orig-x, orig-y */
	51	0, /* unused */
	52	0, /* orig-video-page */
	53	0, /* orig-video-mode */
	54	128, /* orig-video-cols */
	55	0,0,0, /* ega_ax, ega_bx, ega_cx */
	56	54, /* orig-video-lines */
	57	0, /* orig-video-isVGA */
	58	16 /* orig-video-points */
	59	};
	60
	61	/* Typing sync at the prom prompt calls the function pointed to by
	62	* romvec->pv_synchook which I set to the following function.
	63	* This should sync all filesystems and return, for now it just
	64	* prints out pretty messages and returns.
	65	*/
	66
	67	extern unsigned long trapbase;
1da177e4 LT	68
1da177e4 LT	69	/* Pretty sick eh? */
c61c65cd	70	static void prom_sync_me(void)
1da177e4 LT	71	{
	72	unsigned long prom_tbr, flags;
	73
	74	/* XXX Badly broken. FIX! - Anton */
	75	local_irq_save(flags);
	76	__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
	77	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	78	"nop\n\t"
	79	"nop\n\t"
	80	"nop\n\t" : : "r" (&trapbase));
	81
1da177e4 LT	82	prom_printf("PROM SYNC COMMAND...\n");
	83	show_free_areas();
	84	if(current->pid != 0) {
	85	local_irq_enable();
	86	sys_sync();
	87	local_irq_disable();
	88	}
	89	prom_printf("Returning to prom\n");
	90
	91	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	92	"nop\n\t"
	93	"nop\n\t"
	94	"nop\n\t" : : "r" (prom_tbr));
	95	local_irq_restore(flags);
	96
	97	return;
	98	}
	99
c61c65cd	100	static unsigned int boot_flags __initdata = 0;
1da177e4	101	#define BOOTME_DEBUG 0x1
1da177e4 LT	102
	103	/* Exported for mm/init.c:paging_init. */
	104	unsigned long cmdline_memory_size __initdata = 0;
	105
	106	static void
	107	prom_console_write(struct console con, const char s, unsigned n)
	108	{
	109	prom_write(s, n);
	110	}
	111
	112	static struct console prom_debug_console = {
	113	.name = "debug",
	114	.write = prom_console_write,
	115	.flags = CON_PRINTBUFFER,
	116	.index = -1,
	117	};
	118
1da177e4 LT	119	/*
	120	* Process kernel command line switches that are specific to the
	121	* SPARC or that require special low-level processing.
	122	*/
	123	static void __init process_switch(char c)
	124	{
	125	switch (c) {
	126	case 'd':
	127	boot_flags \|= BOOTME_DEBUG;
	128	break;
	129	case 's':
1da177e4 LT	130	break;
	131	case 'h':
	132	prom_printf("boot_flags_init: Halt!\n");
	133	prom_halt();
	134	break;
	135	case 'p':
	136	/* Use PROM debug console. */
	137	register_console(&prom_debug_console);
	138	break;
	139	default:
	140	printk("Unknown boot switch (-%c)\n", c);
	141	break;
	142	}
	143	}
	144
1da177e4 LT	145	static void __init boot_flags_init(char *commands)
	146	{
	147	while (*commands) {
	148	/* Move to the start of the next "argument". */
	149	while (commands && commands == ' ')
	150	commands++;
	151
	152	/* Process any command switches, otherwise skip it. */
	153	if (*commands == '\0')
	154	break;
	155	if (*commands == '-') {
	156	commands++;
	157	while (commands && commands != ' ')
	158	process_switch(*commands++);
	159	continue;
	160	}
c73fcc84	161	if (!strncmp(commands, "mem=", 4)) {
1da177e4 LT	162	/*
	163	* "mem=XXX[kKmM] overrides the PROM-reported
	164	* memory size.
	165	*/
	166	cmdline_memory_size = simple_strtoul(commands + 4,
	167	&commands, 0);
	168	if (commands == 'K' \|\| commands == 'k') {
	169	cmdline_memory_size <<= 10;
	170	commands++;
	171	} else if (commands=='M' \|\| commands=='m') {
	172	cmdline_memory_size <<= 20;
	173	commands++;
	174	}
	175	}
	176	while (commands && commands != ' ')
	177	commands++;
	178	}
	179	}
	180
	181	/* This routine will in the future do all the nasty prom stuff
	182	* to probe for the mmu type and its parameters, etc. This will
9f2b2a5f	183	* also be where SMP things happen.
1da177e4 LT	184	*/
1da177e4 LT	185
1da177e4 LT	186	extern void sun4c_probe_vac(void);
	187	extern char cputypval;
	188	extern unsigned long start, end;
1da177e4 LT	189
	190	extern unsigned short root_flags;
	191	extern unsigned short root_dev;
	192	extern unsigned short ram_flags;
	193	#define RAMDISK_IMAGE_START_MASK 0x07FF
	194	#define RAMDISK_PROMPT_FLAG 0x8000
	195	#define RAMDISK_LOAD_FLAG 0x4000
	196
	197	extern int root_mountflags;
	198
	199	char reboot_command[COMMAND_LINE_SIZE];
	200	enum sparc_cpu sparc_cpu_model;
	201
	202	struct tt_entry *sparc_ttable;
	203
	204	struct pt_regs fake_swapper_regs;
	205
1da177e4 LT	206	void __init setup_arch(char **cmdline_p)
	207	{
	208	int i;
	209	unsigned long highest_paddr;
	210
	211	sparc_ttable = (struct tt_entry *) &start;
	212
	213	/* Initialize PROM console and command line. */
	214	*cmdline_p = prom_getbootargs();
08e7ca11	215	strcpy(boot_command_line, *cmdline_p);
1da177e4 LT	216
	217	/* Set sparc_cpu_model */
	218	sparc_cpu_model = sun_unknown;
	219	if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
	220	if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
	221	if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
	222	if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */
	223	if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
	224	if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
	225	if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
	226
1da177e4 LT	227	printk("ARCH: ");
	228	switch(sparc_cpu_model) {
	229	case sun4:
	230	printk("SUN4\n");
	231	break;
	232	case sun4c:
	233	printk("SUN4C\n");
	234	break;
	235	case sun4m:
	236	printk("SUN4M\n");
	237	break;
	238	case sun4d:
	239	printk("SUN4D\n");
	240	break;
	241	case sun4e:
	242	printk("SUN4E\n");
	243	break;
	244	case sun4u:
	245	printk("SUN4U\n");
	246	break;
	247	default:
	248	printk("UNKNOWN!\n");
	249	break;
	250	};
	251
	252	#ifdef CONFIG_DUMMY_CONSOLE
	253	conswitchp = &dummy_con;
	254	#elif defined(CONFIG_PROM_CONSOLE)
	255	conswitchp = &prom_con;
	256	#endif
	257	boot_flags_init(*cmdline_p);
	258
	259	idprom_init();
5110bd21	260	if (ARCH_SUN4C)
1da177e4 LT	261	sun4c_probe_vac();
1da177e4 LT	262	load_mmu();
1da177e4 LT	263
	264	phys_base = 0xffffffffUL;
	265	highest_paddr = 0UL;
	266	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	267	unsigned long top;
	268
	269	if (sp_banks[i].base_addr < phys_base)
	270	phys_base = sp_banks[i].base_addr;
	271	top = sp_banks[i].base_addr +
	272	sp_banks[i].num_bytes;
	273	if (highest_paddr < top)
	274	highest_paddr = top;
	275	}
	276	pfn_base = phys_base >> PAGE_SHIFT;
	277
	278	if (!root_flags)
	279	root_mountflags &= ~MS_RDONLY;
	280	ROOT_DEV = old_decode_dev(root_dev);
5d2170ad	281	#ifdef CONFIG_BLK_DEV_RAM
1da177e4 LT	282	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
	283	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
	284	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
	285	#endif
	286
	287	prom_setsync(prom_sync_me);
	288
	289	if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
	290	(((short )linux_dbvec) != -1)) {
	291	printk("Booted under KADB. Syncing trap table.\n");
	292	(*(linux_dbvec->teach_debugger))();
	293	}
	294
	295	init_mm.context = (unsigned long) NO_CONTEXT;
	296	init_task.thread.kregs = &fake_swapper_regs;
	297
	298	paging_init();
a23b423e KH	299
a23b423e KH	300	smp_setup_cpu_possible_map();
1da177e4 LT	301	}
1da177e4 LT	302
1da177e4 LT	303	extern char *sparc_cpu_type;
	304	extern char *sparc_fpu_type;
	305
a8cbdcea BB	306	static int ncpus_probed;
a8cbdcea BB	307
1da177e4 LT	308	static int show_cpuinfo(struct seq_file m, void __unused)
	309	{
	310	seq_printf(m,
	311	"cpu\t\t: %s\n"
	312	"fpu\t\t: %s\n"
	313	"promlib\t\t: Version %d Revision %d\n"
	314	"prom\t\t: %d.%d\n"
	315	"type\t\t: %s\n"
	316	"ncpus probed\t: %d\n"
	317	"ncpus active\t: %d\n"
	318	#ifndef CONFIG_SMP
	319	"CPU0Bogo\t: %lu.%02lu\n"
	320	"CPU0ClkTck\t: %ld\n"
	321	#endif
	322	,
	323	sparc_cpu_type ? sparc_cpu_type : "undetermined",
	324	sparc_fpu_type ? sparc_fpu_type : "undetermined",
	325	romvec->pv_romvers,
	326	prom_rev,
	327	romvec->pv_printrev >> 16,
	328	romvec->pv_printrev & 0xffff,
	329	&cputypval,
a8cbdcea	330	ncpus_probed,
1da177e4 LT	331	num_online_cpus()
	332	#ifndef CONFIG_SMP
	333	, cpu_data(0).udelay_val/(500000/HZ),
	334	(cpu_data(0).udelay_val/(5000/HZ)) % 100,
	335	cpu_data(0).clock_tick
	336	#endif
	337	);
	338
	339	#ifdef CONFIG_SMP
	340	smp_bogo(m);
	341	#endif
	342	mmu_info(m);
	343	#ifdef CONFIG_SMP
	344	smp_info(m);
	345	#endif
	346	return 0;
	347	}
	348
	349	static void c_start(struct seq_file m, loff_t *pos)
	350	{
	351	/* The pointer we are returning is arbitrary,
	352	* it just has to be non-NULL and not IS_ERR
	353	* in the success case.
	354	*/
	355	return *pos == 0 ? &c_start : NULL;
	356	}
	357
	358	static void c_next(struct seq_file m, void v, loff_t pos)
	359	{
	360	++*pos;
	361	return c_start(m, pos);
	362	}
	363
	364	static void c_stop(struct seq_file m, void v)
	365	{
	366	}
	367
872e2be7	368	const struct seq_operations cpuinfo_op = {
1da177e4 LT	369	.start =c_start,
	370	.next = c_next,
	371	.stop = c_stop,
	372	.show = show_cpuinfo,
	373	};
	374
	375	extern int stop_a_enabled;
	376
	377	void sun_do_break(void)
	378	{
	379	if (!stop_a_enabled)
	380	return;
	381
	382	printk("\n");
	383	flush_user_windows();
	384
	385	prom_cmdline();
	386	}
	387
1da177e4	388	int stop_a_enabled = 1;
a8cbdcea BB	389
	390	static int __init topology_init(void)
	391	{
	392	int i, ncpus, err;
	393
	394	/* Count the number of physically present processors in
	395	* the machine, even on uniprocessor, so that /proc/cpuinfo
	396	* output is consistent with 2.4.x
	397	*/
	398	ncpus = 0;
	399	while (!cpu_find_by_instance(ncpus, NULL, NULL))
	400	ncpus++;
	401	ncpus_probed = ncpus;
	402
	403	err = 0;
	404	for_each_online_cpu(i) {
	405	struct cpu p = kzalloc(sizeof(p), GFP_KERNEL);
	406	if (!p)
	407	err = -ENOMEM;
	408	else
94583779	409	register_cpu(p, i);
a8cbdcea BB	410	}
	411
	412	return err;
	413	}
	414
	415	subsys_initcall(topology_init);