[mirror_ubuntu-jammy-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 <linux/export.h>
#include <linux/start_kernel.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/cpudata.h>
#include <asm/setup.h>
#include <asm/cacheflush.h>
#include <asm/sections.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.
 */

/* 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(0);
	if (!is_idle_task(current)) {
		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);
}

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;

/* which CPU booted us (0xff = not set) */
unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */

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

static struct console prom_early_console = {
	.name =		"earlyprom",
	.write =	prom_console_write,
	.flags =	CON_PRINTBUFFER | CON_BOOT,
	.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':
		prom_early_console.flags &= ~CON_BOOT;
		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++;
	}
}

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];

struct cpuid_patch_entry {
	unsigned int	addr;
	unsigned int	sun4d[3];
	unsigned int	leon[3];
};
extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;

static void __init per_cpu_patch(void)
{
	struct cpuid_patch_entry *p;

	if (sparc_cpu_model == sun4m) {
		/* Nothing to do, this is what the unpatched code
		 * targets.
		 */
		return;
	}

	p = &__cpuid_patch;
	while (p < &__cpuid_patch_end) {
		unsigned long addr = p->addr;
		unsigned int *insns;

		switch (sparc_cpu_model) {
		case sun4d:
			insns = &p->sun4d[0];
			break;

		case sparc_leon:
			insns = &p->leon[0];
			break;
		default:
			prom_printf("Unknown cpu type, halting.\n");
			prom_halt();
		}
		*(unsigned int *) (addr + 0) = insns[0];
		flushi(addr + 0);
		*(unsigned int *) (addr + 4) = insns[1];
		flushi(addr + 4);
		*(unsigned int *) (addr + 8) = insns[2];
		flushi(addr + 8);

		p++;
	}
}

struct leon_1insn_patch_entry {
	unsigned int addr;
	unsigned int insn;
};

enum sparc_cpu sparc_cpu_model;
EXPORT_SYMBOL(sparc_cpu_model);

static __init void leon_patch(void)
{
	struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
	struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;

	/* Default instruction is leon - no patching */
	if (sparc_cpu_model == sparc_leon)
		return;

	while (start < end) {
		unsigned long addr = start->addr;

		*(unsigned int *)(addr) = start->insn;
		flushi(addr);

		start++;
	}
}

struct tt_entry *sparc_ttable;
static struct pt_regs fake_swapper_regs;

/* Called from head_32.S - before we have setup anything
 * in the kernel. Be very careful with what you do here.
 */
void __init sparc32_start_kernel(struct linux_romvec *rp)
{
	prom_init(rp);

	/* Set sparc_cpu_model */
	sparc_cpu_model = sun_unknown;
	if (!strcmp(&cputypval[0], "sun4m"))
		sparc_cpu_model = sun4m;
	if (!strcmp(&cputypval[0], "sun4s"))
		sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
	if (!strcmp(&cputypval[0], "sun4d"))
		sparc_cpu_model = sun4d;
	if (!strcmp(&cputypval[0], "sun4e"))
		sparc_cpu_model = sun4e;
	if (!strcmp(&cputypval[0], "sun4u"))
		sparc_cpu_model = sun4u;
	if (!strncmp(&cputypval[0], "leon" , 4))
		sparc_cpu_model = sparc_leon;

	leon_patch();
	start_kernel();
}

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

	sparc_ttable = &trapbase;

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

	boot_flags_init(*cmdline_p);

	register_console(&prom_early_console);

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

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif

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

	init_task.thread.kregs = &fake_swapper_regs;

	/* Run-time patch instructions to match the cpu model */
	per_cpu_patch();

	paging_init();

	smp_setup_cpu_possible_map();
}

extern int stop_a_enabled;

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

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

	prom_cmdline();
}
EXPORT_SYMBOL(sun_do_break);

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>
7b64db60	34	#include <linux/export.h>
4efb55e6	35	#include <linux/start_kernel.h>
1da177e4	36
1da177e4 LT	37	#include <asm/io.h>
	38	#include <asm/processor.h>
	39	#include <asm/oplib.h>
	40	#include <asm/page.h>
	41	#include <asm/pgtable.h>
	42	#include <asm/traps.h>
	43	#include <asm/vaddrs.h>
1da177e4 LT	44	#include <asm/mbus.h>
1da177e4 LT	45	#include <asm/idprom.h>
1da177e4 LT	46	#include <asm/cpudata.h>
1da177e4 LT	47	#include <asm/setup.h>
d550bbd4	48	#include <asm/cacheflush.h>
5b8b93c4	49	#include <asm/sections.h>
1da177e4	50
53ae3419 SR	51	#include "kernel.h"
53ae3419 SR	52
1da177e4 LT	53	struct screen_info screen_info = {
	54	0, 0, /* orig-x, orig-y */
	55	0, /* unused */
	56	0, /* orig-video-page */
	57	0, /* orig-video-mode */
	58	128, /* orig-video-cols */
	59	0,0,0, /* ega_ax, ega_bx, ega_cx */
	60	54, /* orig-video-lines */
	61	0, /* orig-video-isVGA */
	62	16 /* orig-video-points */
	63	};
	64
	65	/* Typing sync at the prom prompt calls the function pointed to by
	66	* romvec->pv_synchook which I set to the following function.
	67	* This should sync all filesystems and return, for now it just
	68	* prints out pretty messages and returns.
	69	*/
	70
1da177e4	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	84	prom_printf("PROM SYNC COMMAND...\n");
7bf02ea2	85	show_free_areas(0);
29f043a2	86	if (!is_idle_task(current)) {
1da177e4 LT	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);
1da177e4 LT	98	}
1da177e4 LT	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
5fcafb7a DH	106	/* which CPU booted us (0xff = not set) */
5fcafb7a DH	107	unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
5fcafb7a	108
1da177e4	109	static void
9ef595d8	110	prom_console_write(struct console con, const char s, unsigned int n)
1da177e4 LT	111	{
	112	prom_write(s, n);
	113	}
	114
7671fa22 SR	115	static struct console prom_early_console = {
7671fa22 SR	116	.name = "earlyprom",
1da177e4	117	.write = prom_console_write,
7671fa22	118	.flags = CON_PRINTBUFFER \| CON_BOOT,
1da177e4 LT	119	.index = -1,
	120	};
	121
1da177e4 LT	122	/*
	123	* Process kernel command line switches that are specific to the
	124	* SPARC or that require special low-level processing.
	125	*/
	126	static void __init process_switch(char c)
	127	{
	128	switch (c) {
	129	case 'd':
	130	boot_flags \|= BOOTME_DEBUG;
	131	break;
	132	case 's':
1da177e4 LT	133	break;
	134	case 'h':
	135	prom_printf("boot_flags_init: Halt!\n");
	136	prom_halt();
	137	break;
	138	case 'p':
11032c17	139	prom_early_console.flags &= ~CON_BOOT;
1da177e4 LT	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
1da177e4 LT	183	extern unsigned short root_flags;
	184	extern unsigned short root_dev;
	185	extern unsigned short ram_flags;
	186	#define RAMDISK_IMAGE_START_MASK 0x07FF
	187	#define RAMDISK_PROMPT_FLAG 0x8000
	188	#define RAMDISK_LOAD_FLAG 0x4000
	189
	190	extern int root_mountflags;
	191
	192	char reboot_command[COMMAND_LINE_SIZE];
6943f3da	193
c68e5d39 DM	194	struct cpuid_patch_entry {
	195	unsigned int addr;
	196	unsigned int sun4d[3];
	197	unsigned int leon[3];
	198	};
	199	extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
	200
	201	static void __init per_cpu_patch(void)
	202	{
	203	struct cpuid_patch_entry *p;
	204
	205	if (sparc_cpu_model == sun4m) {
	206	/* Nothing to do, this is what the unpatched code
	207	* targets.
	208	*/
	209	return;
	210	}
	211
	212	p = &__cpuid_patch;
	213	while (p < &__cpuid_patch_end) {
	214	unsigned long addr = p->addr;
	215	unsigned int *insns;
	216
	217	switch (sparc_cpu_model) {
	218	case sun4d:
	219	insns = &p->sun4d[0];
	220	break;
	221
	222	case sparc_leon:
	223	insns = &p->leon[0];
	224	break;
	225	default:
	226	prom_printf("Unknown cpu type, halting.\n");
	227	prom_halt();
	228	}
	229	(unsigned int ) (addr + 0) = insns[0];
1edc1783	230	flushi(addr + 0);
c68e5d39	231	(unsigned int ) (addr + 4) = insns[1];
1edc1783	232	flushi(addr + 4);
c68e5d39	233	(unsigned int ) (addr + 8) = insns[2];
1edc1783	234	flushi(addr + 8);
9cd5f822 SR	235
9cd5f822 SR	236	p++;
c68e5d39	237	}
c68e5d39 DM	238	}
c68e5d39 DM	239
5b8b93c4 SR	240	struct leon_1insn_patch_entry {
	241	unsigned int addr;
	242	unsigned int insn;
	243	};
	244
1da177e4	245	enum sparc_cpu sparc_cpu_model;
6943f3da	246	EXPORT_SYMBOL(sparc_cpu_model);
1da177e4	247
5b8b93c4 SR	248	static __init void leon_patch(void)
	249	{
	250	struct leon_1insn_patch_entry start = (void )__leon_1insn_patch;
	251	struct leon_1insn_patch_entry end = (void )__leon_1insn_patch_end;
	252
	253	/* Default instruction is leon - no patching */
	254	if (sparc_cpu_model == sparc_leon)
	255	return;
	256
	257	while (start < end) {
	258	unsigned long addr = start->addr;
	259
	260	(unsigned int )(addr) = start->insn;
	261	flushi(addr);
	262
	263	start++;
	264	}
	265	}
1da177e4	266
5b8b93c4	267	struct tt_entry *sparc_ttable;
d191723f	268	static struct pt_regs fake_swapper_regs;
1da177e4	269
4efb55e6 SR	270	/* Called from head_32.S - before we have setup anything
	271	* in the kernel. Be very careful with what you do here.
	272	*/
	273	void __init sparc32_start_kernel(struct linux_romvec *rp)
	274	{
	275	prom_init(rp);
5b8b93c4 SR	276
	277	/* Set sparc_cpu_model */
	278	sparc_cpu_model = sun_unknown;
	279	if (!strcmp(&cputypval[0], "sun4m"))
	280	sparc_cpu_model = sun4m;
	281	if (!strcmp(&cputypval[0], "sun4s"))
	282	sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
	283	if (!strcmp(&cputypval[0], "sun4d"))
	284	sparc_cpu_model = sun4d;
	285	if (!strcmp(&cputypval[0], "sun4e"))
	286	sparc_cpu_model = sun4e;
	287	if (!strcmp(&cputypval[0], "sun4u"))
	288	sparc_cpu_model = sun4u;
	289	if (!strncmp(&cputypval[0], "leon" , 4))
	290	sparc_cpu_model = sparc_leon;
	291
	292	leon_patch();
4efb55e6 SR	293	start_kernel();
	294	}
	295
1da177e4 LT	296	void __init setup_arch(char **cmdline_p)
	297	{
	298	int i;
	299	unsigned long highest_paddr;
	300
3c46e2d6	301	sparc_ttable = &trapbase;
1da177e4 LT	302
	303	/* Initialize PROM console and command line. */
	304	*cmdline_p = prom_getbootargs();
117a0c5f	305	strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
3fbe36d8	306	parse_early_param();
1da177e4	307
7671fa22 SR	308	boot_flags_init(*cmdline_p);
	309
	310	register_console(&prom_early_console);
	311
1da177e4 LT	312	printk("ARCH: ");
1da177e4 LT	313	switch(sparc_cpu_model) {
1da177e4 LT	314	case sun4m:
	315	printk("SUN4M\n");
	316	break;
	317	case sun4d:
	318	printk("SUN4D\n");
	319	break;
	320	case sun4e:
	321	printk("SUN4E\n");
	322	break;
	323	case sun4u:
	324	printk("SUN4U\n");
	325	break;
0fd7ef1f KE	326	case sparc_leon:
	327	printk("LEON\n");
	328	break;
1da177e4 LT	329	default:
	330	printk("UNKNOWN!\n");
	331	break;
6cb79b3f	332	}
1da177e4 LT	333
	334	#ifdef CONFIG_DUMMY_CONSOLE
	335	conswitchp = &dummy_con;
1da177e4	336	#endif
1da177e4 LT	337
1da177e4 LT	338	idprom_init();
1da177e4	339	load_mmu();
1da177e4 LT	340
	341	phys_base = 0xffffffffUL;
	342	highest_paddr = 0UL;
	343	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	344	unsigned long top;
	345
	346	if (sp_banks[i].base_addr < phys_base)
	347	phys_base = sp_banks[i].base_addr;
	348	top = sp_banks[i].base_addr +
	349	sp_banks[i].num_bytes;
	350	if (highest_paddr < top)
	351	highest_paddr = top;
	352	}
	353	pfn_base = phys_base >> PAGE_SHIFT;
	354
	355	if (!root_flags)
	356	root_mountflags &= ~MS_RDONLY;
	357	ROOT_DEV = old_decode_dev(root_dev);
5d2170ad	358	#ifdef CONFIG_BLK_DEV_RAM
1da177e4 LT	359	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
	360	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
	361	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
	362	#endif
	363
	364	prom_setsync(prom_sync_me);
	365
d191723f	366	if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
1da177e4 LT	367	(((short )linux_dbvec) != -1)) {
	368	printk("Booted under KADB. Syncing trap table.\n");
	369	(*(linux_dbvec->teach_debugger))();
	370	}
	371
1da177e4 LT	372	init_task.thread.kregs = &fake_swapper_regs;
1da177e4 LT	373
1edc1783	374	/* Run-time patch instructions to match the cpu model */
c68e5d39 DM	375	per_cpu_patch();
c68e5d39 DM	376
1edc1783 SR	377	paging_init();
1edc1783 SR	378
a23b423e	379	smp_setup_cpu_possible_map();
1da177e4 LT	380	}
1da177e4 LT	381
1da177e4 LT	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	}
6943f3da	394	EXPORT_SYMBOL(sun_do_break);
1da177e4	395
1da177e4	396	int stop_a_enabled = 1;
a8cbdcea BB	397
	398	static int __init topology_init(void)
	399	{
	400	int i, ncpus, err;
	401
	402	/* Count the number of physically present processors in
	403	* the machine, even on uniprocessor, so that /proc/cpuinfo
	404	* output is consistent with 2.4.x
	405	*/
	406	ncpus = 0;
	407	while (!cpu_find_by_instance(ncpus, NULL, NULL))
	408	ncpus++;
	409	ncpus_probed = ncpus;
	410
	411	err = 0;
	412	for_each_online_cpu(i) {
	413	struct cpu p = kzalloc(sizeof(p), GFP_KERNEL);
	414	if (!p)
	415	err = -ENOMEM;
	416	else
94583779	417	register_cpu(p, i);
a8cbdcea BB	418	}
	419
	420	return err;
	421	}
	422
	423	subsys_initcall(topology_init);