[linux-block.git] / arch / sparc / kernel / setup_32.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  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, NULL);
	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++;

		/* 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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
88278ca2	2	/*
1da177e4 LT	3	* linux/arch/sparc/kernel/setup.c
	4	*
	5	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	6	* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
	7	*/
	8
	9	#include <linux/errno.h>
	10	#include <linux/sched.h>
	11	#include <linux/kernel.h>
	12	#include <linux/mm.h>
	13	#include <linux/stddef.h>
	14	#include <linux/unistd.h>
	15	#include <linux/ptrace.h>
	16	#include <linux/slab.h>
	17	#include <linux/initrd.h>
	18	#include <asm/smp.h>
	19	#include <linux/user.h>
894673ee	20	#include <linux/screen_info.h>
1da177e4	21	#include <linux/delay.h>
1da177e4 LT	22	#include <linux/fs.h>
	23	#include <linux/seq_file.h>
	24	#include <linux/syscalls.h>
	25	#include <linux/kdev_t.h>
	26	#include <linux/major.h>
	27	#include <linux/string.h>
	28	#include <linux/init.h>
	29	#include <linux/interrupt.h>
	30	#include <linux/console.h>
	31	#include <linux/spinlock.h>
	32	#include <linux/root_dev.h>
a8cbdcea	33	#include <linux/cpu.h>
1eeb66a1	34	#include <linux/kdebug.h>
7b64db60	35	#include <linux/export.h>
4efb55e6	36	#include <linux/start_kernel.h>
1da177e4	37
1da177e4 LT	38	#include <asm/io.h>
	39	#include <asm/processor.h>
	40	#include <asm/oplib.h>
	41	#include <asm/page.h>
	42	#include <asm/pgtable.h>
	43	#include <asm/traps.h>
	44	#include <asm/vaddrs.h>
1da177e4 LT	45	#include <asm/mbus.h>
1da177e4 LT	46	#include <asm/idprom.h>
1da177e4 LT	47	#include <asm/cpudata.h>
1da177e4 LT	48	#include <asm/setup.h>
d550bbd4	49	#include <asm/cacheflush.h>
5b8b93c4	50	#include <asm/sections.h>
1da177e4	51
53ae3419 SR	52	#include "kernel.h"
53ae3419 SR	53
1da177e4 LT	54	struct screen_info screen_info = {
	55	0, 0, /* orig-x, orig-y */
	56	0, /* unused */
	57	0, /* orig-video-page */
	58	0, /* orig-video-mode */
	59	128, /* orig-video-cols */
	60	0,0,0, /* ega_ax, ega_bx, ega_cx */
	61	54, /* orig-video-lines */
	62	0, /* orig-video-isVGA */
	63	16 /* orig-video-points */
	64	};
	65
	66	/* Typing sync at the prom prompt calls the function pointed to by
	67	* romvec->pv_synchook which I set to the following function.
	68	* This should sync all filesystems and return, for now it just
	69	* prints out pretty messages and returns.
	70	*/
	71
1da177e4	72	/* Pretty sick eh? */
c61c65cd	73	static void prom_sync_me(void)
1da177e4 LT	74	{
	75	unsigned long prom_tbr, flags;
	76
	77	/* XXX Badly broken. FIX! - Anton */
	78	local_irq_save(flags);
	79	__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
	80	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	81	"nop\n\t"
	82	"nop\n\t"
	83	"nop\n\t" : : "r" (&trapbase));
	84
1da177e4	85	prom_printf("PROM SYNC COMMAND...\n");
9af744d7	86	show_free_areas(0, NULL);
29f043a2	87	if (!is_idle_task(current)) {
1da177e4 LT	88	local_irq_enable();
	89	sys_sync();
	90	local_irq_disable();
	91	}
	92	prom_printf("Returning to prom\n");
	93
	94	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	95	"nop\n\t"
	96	"nop\n\t"
	97	"nop\n\t" : : "r" (prom_tbr));
	98	local_irq_restore(flags);
1da177e4 LT	99	}
1da177e4 LT	100
c61c65cd	101	static unsigned int boot_flags __initdata = 0;
1da177e4	102	#define BOOTME_DEBUG 0x1
1da177e4 LT	103
	104	/* Exported for mm/init.c:paging_init. */
	105	unsigned long cmdline_memory_size __initdata = 0;
	106
5fcafb7a DH	107	/* which CPU booted us (0xff = not set) */
5fcafb7a DH	108	unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
5fcafb7a	109
1da177e4	110	static void
9ef595d8	111	prom_console_write(struct console con, const char s, unsigned int n)
1da177e4 LT	112	{
	113	prom_write(s, n);
	114	}
	115
7671fa22 SR	116	static struct console prom_early_console = {
7671fa22 SR	117	.name = "earlyprom",
1da177e4	118	.write = prom_console_write,
7671fa22	119	.flags = CON_PRINTBUFFER \| CON_BOOT,
1da177e4 LT	120	.index = -1,
	121	};
	122
1da177e4 LT	123	/*
	124	* Process kernel command line switches that are specific to the
	125	* SPARC or that require special low-level processing.
	126	*/
	127	static void __init process_switch(char c)
	128	{
	129	switch (c) {
	130	case 'd':
	131	boot_flags \|= BOOTME_DEBUG;
	132	break;
	133	case 's':
1da177e4 LT	134	break;
	135	case 'h':
	136	prom_printf("boot_flags_init: Halt!\n");
	137	prom_halt();
	138	break;
	139	case 'p':
11032c17	140	prom_early_console.flags &= ~CON_BOOT;
1da177e4 LT	141	break;
	142	default:
	143	printk("Unknown boot switch (-%c)\n", c);
	144	break;
	145	}
	146	}
	147
1da177e4 LT	148	static void __init boot_flags_init(char *commands)
	149	{
	150	while (*commands) {
	151	/* Move to the start of the next "argument". */
8c64415c	152	while (*commands == ' ')
1da177e4 LT	153	commands++;
	154
	155	/* Process any command switches, otherwise skip it. */
	156	if (*commands == '\0')
	157	break;
	158	if (*commands == '-') {
	159	commands++;
	160	while (commands && commands != ' ')
	161	process_switch(*commands++);
	162	continue;
	163	}
c73fcc84	164	if (!strncmp(commands, "mem=", 4)) {
1da177e4 LT	165	/*
	166	* "mem=XXX[kKmM] overrides the PROM-reported
	167	* memory size.
	168	*/
	169	cmdline_memory_size = simple_strtoul(commands + 4,
	170	&commands, 0);
	171	if (commands == 'K' \|\| commands == 'k') {
	172	cmdline_memory_size <<= 10;
	173	commands++;
	174	} else if (commands=='M' \|\| commands=='m') {
	175	cmdline_memory_size <<= 20;
	176	commands++;
	177	}
	178	}
	179	while (commands && commands != ' ')
	180	commands++;
	181	}
	182	}
	183
1da177e4 LT	184	extern unsigned short root_flags;
	185	extern unsigned short root_dev;
	186	extern unsigned short ram_flags;
	187	#define RAMDISK_IMAGE_START_MASK 0x07FF
	188	#define RAMDISK_PROMPT_FLAG 0x8000
	189	#define RAMDISK_LOAD_FLAG 0x4000
	190
	191	extern int root_mountflags;
	192
	193	char reboot_command[COMMAND_LINE_SIZE];
6943f3da	194
c68e5d39 DM	195	struct cpuid_patch_entry {
	196	unsigned int addr;
	197	unsigned int sun4d[3];
	198	unsigned int leon[3];
	199	};
	200	extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
	201
	202	static void __init per_cpu_patch(void)
	203	{
	204	struct cpuid_patch_entry *p;
	205
	206	if (sparc_cpu_model == sun4m) {
	207	/* Nothing to do, this is what the unpatched code
	208	* targets.
	209	*/
	210	return;
	211	}
	212
	213	p = &__cpuid_patch;
	214	while (p < &__cpuid_patch_end) {
	215	unsigned long addr = p->addr;
	216	unsigned int *insns;
	217
	218	switch (sparc_cpu_model) {
	219	case sun4d:
	220	insns = &p->sun4d[0];
	221	break;
	222
	223	case sparc_leon:
	224	insns = &p->leon[0];
	225	break;
	226	default:
	227	prom_printf("Unknown cpu type, halting.\n");
	228	prom_halt();
	229	}
	230	(unsigned int ) (addr + 0) = insns[0];
1edc1783	231	flushi(addr + 0);
c68e5d39	232	(unsigned int ) (addr + 4) = insns[1];
1edc1783	233	flushi(addr + 4);
c68e5d39	234	(unsigned int ) (addr + 8) = insns[2];
1edc1783	235	flushi(addr + 8);
9cd5f822 SR	236
9cd5f822 SR	237	p++;
c68e5d39	238	}
c68e5d39 DM	239	}
c68e5d39 DM	240
5b8b93c4 SR	241	struct leon_1insn_patch_entry {
	242	unsigned int addr;
	243	unsigned int insn;
	244	};
	245
1da177e4	246	enum sparc_cpu sparc_cpu_model;
6943f3da	247	EXPORT_SYMBOL(sparc_cpu_model);
1da177e4	248
5b8b93c4 SR	249	static __init void leon_patch(void)
	250	{
	251	struct leon_1insn_patch_entry start = (void )__leon_1insn_patch;
	252	struct leon_1insn_patch_entry end = (void )__leon_1insn_patch_end;
	253
	254	/* Default instruction is leon - no patching */
	255	if (sparc_cpu_model == sparc_leon)
	256	return;
	257
	258	while (start < end) {
	259	unsigned long addr = start->addr;
	260
	261	(unsigned int )(addr) = start->insn;
	262	flushi(addr);
	263
	264	start++;
	265	}
	266	}
1da177e4	267
5b8b93c4	268	struct tt_entry *sparc_ttable;
d191723f	269	static struct pt_regs fake_swapper_regs;
1da177e4	270
4efb55e6 SR	271	/* Called from head_32.S - before we have setup anything
	272	* in the kernel. Be very careful with what you do here.
	273	*/
	274	void __init sparc32_start_kernel(struct linux_romvec *rp)
	275	{
	276	prom_init(rp);
5b8b93c4 SR	277
	278	/* Set sparc_cpu_model */
	279	sparc_cpu_model = sun_unknown;
	280	if (!strcmp(&cputypval[0], "sun4m"))
	281	sparc_cpu_model = sun4m;
	282	if (!strcmp(&cputypval[0], "sun4s"))
	283	sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
	284	if (!strcmp(&cputypval[0], "sun4d"))
	285	sparc_cpu_model = sun4d;
	286	if (!strcmp(&cputypval[0], "sun4e"))
	287	sparc_cpu_model = sun4e;
	288	if (!strcmp(&cputypval[0], "sun4u"))
	289	sparc_cpu_model = sun4u;
	290	if (!strncmp(&cputypval[0], "leon" , 4))
	291	sparc_cpu_model = sparc_leon;
	292
	293	leon_patch();
4efb55e6 SR	294	start_kernel();
	295	}
	296
1da177e4 LT	297	void __init setup_arch(char **cmdline_p)
	298	{
	299	int i;
	300	unsigned long highest_paddr;
	301
3c46e2d6	302	sparc_ttable = &trapbase;
1da177e4 LT	303
	304	/* Initialize PROM console and command line. */
	305	*cmdline_p = prom_getbootargs();
117a0c5f	306	strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
3fbe36d8	307	parse_early_param();
1da177e4	308
7671fa22 SR	309	boot_flags_init(*cmdline_p);
	310
	311	register_console(&prom_early_console);
	312
1da177e4 LT	313	printk("ARCH: ");
1da177e4 LT	314	switch(sparc_cpu_model) {
1da177e4 LT	315	case sun4m:
	316	printk("SUN4M\n");
	317	break;
	318	case sun4d:
	319	printk("SUN4D\n");
	320	break;
	321	case sun4e:
	322	printk("SUN4E\n");
	323	break;
	324	case sun4u:
	325	printk("SUN4U\n");
	326	break;
0fd7ef1f KE	327	case sparc_leon:
	328	printk("LEON\n");
	329	break;
1da177e4 LT	330	default:
	331	printk("UNKNOWN!\n");
	332	break;
6cb79b3f	333	}
1da177e4 LT	334
	335	#ifdef CONFIG_DUMMY_CONSOLE
	336	conswitchp = &dummy_con;
1da177e4	337	#endif
1da177e4 LT	338
1da177e4 LT	339	idprom_init();
1da177e4	340	load_mmu();
1da177e4 LT	341
	342	phys_base = 0xffffffffUL;
	343	highest_paddr = 0UL;
	344	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	345	unsigned long top;
	346
	347	if (sp_banks[i].base_addr < phys_base)
	348	phys_base = sp_banks[i].base_addr;
	349	top = sp_banks[i].base_addr +
	350	sp_banks[i].num_bytes;
	351	if (highest_paddr < top)
	352	highest_paddr = top;
	353	}
	354	pfn_base = phys_base >> PAGE_SHIFT;
	355
	356	if (!root_flags)
	357	root_mountflags &= ~MS_RDONLY;
	358	ROOT_DEV = old_decode_dev(root_dev);
5d2170ad	359	#ifdef CONFIG_BLK_DEV_RAM
1da177e4 LT	360	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
	361	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
	362	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
	363	#endif
	364
	365	prom_setsync(prom_sync_me);
	366
d191723f	367	if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
1da177e4 LT	368	(((short )linux_dbvec) != -1)) {
	369	printk("Booted under KADB. Syncing trap table.\n");
	370	(*(linux_dbvec->teach_debugger))();
	371	}
	372
1da177e4 LT	373	init_task.thread.kregs = &fake_swapper_regs;
1da177e4 LT	374
1edc1783	375	/* Run-time patch instructions to match the cpu model */
c68e5d39 DM	376	per_cpu_patch();
c68e5d39 DM	377
1edc1783 SR	378	paging_init();
1edc1783 SR	379
a23b423e	380	smp_setup_cpu_possible_map();
1da177e4 LT	381	}
1da177e4 LT	382
1da177e4 LT	383	extern int stop_a_enabled;
	384
	385	void sun_do_break(void)
	386	{
	387	if (!stop_a_enabled)
	388	return;
	389
	390	printk("\n");
	391	flush_user_windows();
	392
	393	prom_cmdline();
	394	}
6943f3da	395	EXPORT_SYMBOL(sun_do_break);
1da177e4	396
1da177e4	397	int stop_a_enabled = 1;
a8cbdcea BB	398
	399	static int __init topology_init(void)
	400	{
	401	int i, ncpus, err;
	402
	403	/* Count the number of physically present processors in
	404	* the machine, even on uniprocessor, so that /proc/cpuinfo
	405	* output is consistent with 2.4.x
	406	*/
	407	ncpus = 0;
	408	while (!cpu_find_by_instance(ncpus, NULL, NULL))
	409	ncpus++;
	410	ncpus_probed = ncpus;
	411
	412	err = 0;
	413	for_each_online_cpu(i) {
	414	struct cpu p = kzalloc(sizeof(p), GFP_KERNEL);
	415	if (!p)
	416	err = -ENOMEM;
	417	else
94583779	418	register_cpu(p, i);
a8cbdcea BB	419	}
	420
	421	return err;
	422	}
	423
	424	subsys_initcall(topology_init);