[mirror_ubuntu-bionic-kernel.git] / arch / sparc / kernel / setup_32.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>

#include "kernel.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);
	parse_early_param();

	/* 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();
}

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_fpu_type ,
		   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
53ae3419 SR	49	#include "kernel.h"
53ae3419 SR	50
1da177e4 LT	51	struct screen_info screen_info = {
	52	0, 0, /* orig-x, orig-y */
	53	0, /* unused */
	54	0, /* orig-video-page */
	55	0, /* orig-video-mode */
	56	128, /* orig-video-cols */
	57	0,0,0, /* ega_ax, ega_bx, ega_cx */
	58	54, /* orig-video-lines */
	59	0, /* orig-video-isVGA */
	60	16 /* orig-video-points */
	61	};
	62
	63	/* Typing sync at the prom prompt calls the function pointed to by
	64	* romvec->pv_synchook which I set to the following function.
	65	* This should sync all filesystems and return, for now it just
	66	* prints out pretty messages and returns.
	67	*/
	68
	69	extern unsigned long trapbase;
1da177e4 LT	70
1da177e4 LT	71	/* Pretty sick eh? */
c61c65cd	72	static void prom_sync_me(void)
1da177e4 LT	73	{
	74	unsigned long prom_tbr, flags;
	75
	76	/* XXX Badly broken. FIX! - Anton */
	77	local_irq_save(flags);
	78	__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
	79	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	80	"nop\n\t"
	81	"nop\n\t"
	82	"nop\n\t" : : "r" (&trapbase));
	83
1da177e4 LT	84	prom_printf("PROM SYNC COMMAND...\n");
	85	show_free_areas();
	86	if(current->pid != 0) {
	87	local_irq_enable();
	88	sys_sync();
	89	local_irq_disable();
	90	}
	91	prom_printf("Returning to prom\n");
	92
	93	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	94	"nop\n\t"
	95	"nop\n\t"
	96	"nop\n\t" : : "r" (prom_tbr));
	97	local_irq_restore(flags);
	98
	99	return;
	100	}
	101
c61c65cd	102	static unsigned int boot_flags __initdata = 0;
1da177e4	103	#define BOOTME_DEBUG 0x1
1da177e4 LT	104
	105	/* Exported for mm/init.c:paging_init. */
	106	unsigned long cmdline_memory_size __initdata = 0;
	107
	108	static void
	109	prom_console_write(struct console con, const char s, unsigned n)
	110	{
	111	prom_write(s, n);
	112	}
	113
	114	static struct console prom_debug_console = {
	115	.name = "debug",
	116	.write = prom_console_write,
	117	.flags = CON_PRINTBUFFER,
	118	.index = -1,
	119	};
	120
1da177e4 LT	121	/*
	122	* Process kernel command line switches that are specific to the
	123	* SPARC or that require special low-level processing.
	124	*/
	125	static void __init process_switch(char c)
	126	{
	127	switch (c) {
	128	case 'd':
	129	boot_flags \|= BOOTME_DEBUG;
	130	break;
	131	case 's':
1da177e4 LT	132	break;
	133	case 'h':
	134	prom_printf("boot_flags_init: Halt!\n");
	135	prom_halt();
	136	break;
	137	case 'p':
	138	/* Use PROM debug console. */
	139	register_console(&prom_debug_console);
	140	break;
	141	default:
	142	printk("Unknown boot switch (-%c)\n", c);
	143	break;
	144	}
	145	}
	146
1da177e4 LT	147	static void __init boot_flags_init(char *commands)
	148	{
	149	while (*commands) {
	150	/* Move to the start of the next "argument". */
	151	while (commands && commands == ' ')
	152	commands++;
	153
	154	/* Process any command switches, otherwise skip it. */
	155	if (*commands == '\0')
	156	break;
	157	if (*commands == '-') {
	158	commands++;
	159	while (commands && commands != ' ')
	160	process_switch(*commands++);
	161	continue;
	162	}
c73fcc84	163	if (!strncmp(commands, "mem=", 4)) {
1da177e4 LT	164	/*
	165	* "mem=XXX[kKmM] overrides the PROM-reported
	166	* memory size.
	167	*/
	168	cmdline_memory_size = simple_strtoul(commands + 4,
	169	&commands, 0);
	170	if (commands == 'K' \|\| commands == 'k') {
	171	cmdline_memory_size <<= 10;
	172	commands++;
	173	} else if (commands=='M' \|\| commands=='m') {
	174	cmdline_memory_size <<= 20;
	175	commands++;
	176	}
	177	}
	178	while (commands && commands != ' ')
	179	commands++;
	180	}
	181	}
	182
	183	/* This routine will in the future do all the nasty prom stuff
	184	* to probe for the mmu type and its parameters, etc. This will
9f2b2a5f	185	* also be where SMP things happen.
1da177e4 LT	186	*/
1da177e4 LT	187
1da177e4 LT	188	extern void sun4c_probe_vac(void);
	189	extern char cputypval;
	190	extern unsigned long start, end;
1da177e4 LT	191
	192	extern unsigned short root_flags;
	193	extern unsigned short root_dev;
	194	extern unsigned short ram_flags;
	195	#define RAMDISK_IMAGE_START_MASK 0x07FF
	196	#define RAMDISK_PROMPT_FLAG 0x8000
	197	#define RAMDISK_LOAD_FLAG 0x4000
	198
	199	extern int root_mountflags;
	200
	201	char reboot_command[COMMAND_LINE_SIZE];
	202	enum sparc_cpu sparc_cpu_model;
	203
	204	struct tt_entry *sparc_ttable;
	205
	206	struct pt_regs fake_swapper_regs;
	207
1da177e4 LT	208	void __init setup_arch(char **cmdline_p)
	209	{
	210	int i;
	211	unsigned long highest_paddr;
	212
	213	sparc_ttable = (struct tt_entry *) &start;
	214
	215	/* Initialize PROM console and command line. */
	216	*cmdline_p = prom_getbootargs();
08e7ca11	217	strcpy(boot_command_line, *cmdline_p);
3fbe36d8	218	parse_early_param();
1da177e4 LT	219
	220	/* Set sparc_cpu_model */
	221	sparc_cpu_model = sun_unknown;
365b50f0 DM	222	if (!strcmp(&cputypval,"sun4 "))
	223	sparc_cpu_model = sun4;
	224	if (!strcmp(&cputypval,"sun4c"))
	225	sparc_cpu_model = sun4c;
	226	if (!strcmp(&cputypval,"sun4m"))
	227	sparc_cpu_model = sun4m;
	228	if (!strcmp(&cputypval,"sun4s"))
	229	sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
	230	if (!strcmp(&cputypval,"sun4d"))
	231	sparc_cpu_model = sun4d;
	232	if (!strcmp(&cputypval,"sun4e"))
	233	sparc_cpu_model = sun4e;
	234	if (!strcmp(&cputypval,"sun4u"))
	235	sparc_cpu_model = sun4u;
1da177e4	236
1da177e4 LT	237	printk("ARCH: ");
	238	switch(sparc_cpu_model) {
	239	case sun4:
	240	printk("SUN4\n");
	241	break;
	242	case sun4c:
	243	printk("SUN4C\n");
	244	break;
	245	case sun4m:
	246	printk("SUN4M\n");
	247	break;
	248	case sun4d:
	249	printk("SUN4D\n");
	250	break;
	251	case sun4e:
	252	printk("SUN4E\n");
	253	break;
	254	case sun4u:
	255	printk("SUN4U\n");
	256	break;
	257	default:
	258	printk("UNKNOWN!\n");
	259	break;
	260	};
	261
	262	#ifdef CONFIG_DUMMY_CONSOLE
	263	conswitchp = &dummy_con;
	264	#elif defined(CONFIG_PROM_CONSOLE)
	265	conswitchp = &prom_con;
	266	#endif
	267	boot_flags_init(*cmdline_p);
	268
	269	idprom_init();
5110bd21	270	if (ARCH_SUN4C)
1da177e4 LT	271	sun4c_probe_vac();
1da177e4 LT	272	load_mmu();
1da177e4 LT	273
	274	phys_base = 0xffffffffUL;
	275	highest_paddr = 0UL;
	276	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	277	unsigned long top;
	278
	279	if (sp_banks[i].base_addr < phys_base)
	280	phys_base = sp_banks[i].base_addr;
	281	top = sp_banks[i].base_addr +
	282	sp_banks[i].num_bytes;
	283	if (highest_paddr < top)
	284	highest_paddr = top;
	285	}
	286	pfn_base = phys_base >> PAGE_SHIFT;
	287
	288	if (!root_flags)
	289	root_mountflags &= ~MS_RDONLY;
	290	ROOT_DEV = old_decode_dev(root_dev);
5d2170ad	291	#ifdef CONFIG_BLK_DEV_RAM
1da177e4 LT	292	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
	293	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
	294	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
	295	#endif
	296
	297	prom_setsync(prom_sync_me);
	298
	299	if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
	300	(((short )linux_dbvec) != -1)) {
	301	printk("Booted under KADB. Syncing trap table.\n");
	302	(*(linux_dbvec->teach_debugger))();
	303	}
	304
	305	init_mm.context = (unsigned long) NO_CONTEXT;
	306	init_task.thread.kregs = &fake_swapper_regs;
	307
	308	paging_init();
a23b423e KH	309
a23b423e KH	310	smp_setup_cpu_possible_map();
1da177e4 LT	311	}
1da177e4 LT	312
a8cbdcea BB	313	static int ncpus_probed;
a8cbdcea BB	314
1da177e4 LT	315	static int show_cpuinfo(struct seq_file m, void __unused)
	316	{
	317	seq_printf(m,
	318	"cpu\t\t: %s\n"
	319	"fpu\t\t: %s\n"
	320	"promlib\t\t: Version %d Revision %d\n"
	321	"prom\t\t: %d.%d\n"
	322	"type\t\t: %s\n"
	323	"ncpus probed\t: %d\n"
	324	"ncpus active\t: %d\n"
	325	#ifndef CONFIG_SMP
	326	"CPU0Bogo\t: %lu.%02lu\n"
	327	"CPU0ClkTck\t: %ld\n"
	328	#endif
	329	,
6c6bd8b6 SR	330	sparc_cpu_type,
6c6bd8b6 SR	331	sparc_fpu_type ,
1da177e4 LT	332	romvec->pv_romvers,
	333	prom_rev,
	334	romvec->pv_printrev >> 16,
	335	romvec->pv_printrev & 0xffff,
	336	&cputypval,
a8cbdcea	337	ncpus_probed,
1da177e4 LT	338	num_online_cpus()
	339	#ifndef CONFIG_SMP
	340	, cpu_data(0).udelay_val/(500000/HZ),
	341	(cpu_data(0).udelay_val/(5000/HZ)) % 100,
	342	cpu_data(0).clock_tick
	343	#endif
	344	);
	345
	346	#ifdef CONFIG_SMP
	347	smp_bogo(m);
	348	#endif
	349	mmu_info(m);
	350	#ifdef CONFIG_SMP
	351	smp_info(m);
	352	#endif
	353	return 0;
	354	}
	355
	356	static void c_start(struct seq_file m, loff_t *pos)
	357	{
	358	/* The pointer we are returning is arbitrary,
	359	* it just has to be non-NULL and not IS_ERR
	360	* in the success case.
	361	*/
	362	return *pos == 0 ? &c_start : NULL;
	363	}
	364
	365	static void c_next(struct seq_file m, void v, loff_t pos)
	366	{
	367	++*pos;
	368	return c_start(m, pos);
	369	}
	370
	371	static void c_stop(struct seq_file m, void v)
	372	{
	373	}
	374
872e2be7	375	const struct seq_operations cpuinfo_op = {
1da177e4 LT	376	.start =c_start,
	377	.next = c_next,
	378	.stop = c_stop,
	379	.show = show_cpuinfo,
	380	};
	381
	382	extern int stop_a_enabled;
	383
	384	void sun_do_break(void)
	385	{
	386	if (!stop_a_enabled)
	387	return;
	388
	389	printk("\n");
	390	flush_user_windows();
	391
	392	prom_cmdline();
	393	}
	394
1da177e4	395	int stop_a_enabled = 1;
a8cbdcea BB	396
	397	static int __init topology_init(void)
	398	{
	399	int i, ncpus, err;
	400
	401	/* Count the number of physically present processors in
	402	* the machine, even on uniprocessor, so that /proc/cpuinfo
	403	* output is consistent with 2.4.x
	404	*/
	405	ncpus = 0;
	406	while (!cpu_find_by_instance(ncpus, NULL, NULL))
	407	ncpus++;
	408	ncpus_probed = ncpus;
	409
	410	err = 0;
	411	for_each_online_cpu(i) {
	412	struct cpu p = kzalloc(sizeof(p), GFP_KERNEL);
	413	if (!p)
	414	err = -ENOMEM;
	415	else
94583779	416	register_cpu(p, i);
a8cbdcea BB	417	}
	418
	419	return err;
	420	}
	421
	422	subsys_initcall(topology_init);