[linux-2.6-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/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 <uapi/linux/mount.h>

#include <asm/io.h>
#include <asm/processor.h>
#include <asm/oplib.h>
#include <asm/page.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"

/* 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[0]));

	prom_printf("PROM SYNC COMMAND...\n");
	show_mem();
	if (!is_idle_task(current)) {
		local_irq_enable();
		ksys_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;

/* 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[0];

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

	boot_flags_init(*cmdline_p);

	register_console(&prom_early_console);

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

	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;
#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))();
	}

	/* 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);

#if defined(CONFIG_SPARC32) && !defined(CONFIG_SMP)
void __init arch_cpu_finalize_init(void)
{
	cpu_data(0).udelay_val = loops_per_jiffy;
}
#endif
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>
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>
e262e32d	36	#include <uapi/linux/mount.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>
1da177e4 LT	42	#include <asm/traps.h>
1da177e4 LT	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	/* Typing sync at the prom prompt calls the function pointed to by
	54	* romvec->pv_synchook which I set to the following function.
	55	* This should sync all filesystems and return, for now it just
	56	* prints out pretty messages and returns.
	57	*/
	58
1da177e4	59	/* Pretty sick eh? */
c61c65cd	60	static void prom_sync_me(void)
1da177e4 LT	61	{
	62	unsigned long prom_tbr, flags;
	63
	64	/* XXX Badly broken. FIX! - Anton */
	65	local_irq_save(flags);
	66	__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
	67	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	68	"nop\n\t"
	69	"nop\n\t"
7bfba2ca	70	"nop\n\t" : : "r" (&trapbase[0]));
1da177e4	71
1da177e4	72	prom_printf("PROM SYNC COMMAND...\n");
1279aa06	73	show_mem();
29f043a2	74	if (!is_idle_task(current)) {
1da177e4	75	local_irq_enable();
70f68ee8	76	ksys_sync();
1da177e4 LT	77	local_irq_disable();
	78	}
	79	prom_printf("Returning to prom\n");
	80
	81	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	82	"nop\n\t"
	83	"nop\n\t"
	84	"nop\n\t" : : "r" (prom_tbr));
	85	local_irq_restore(flags);
1da177e4 LT	86	}
1da177e4 LT	87
c61c65cd	88	static unsigned int boot_flags __initdata = 0;
1da177e4	89	#define BOOTME_DEBUG 0x1
1da177e4 LT	90
	91	/* Exported for mm/init.c:paging_init. */
	92	unsigned long cmdline_memory_size __initdata = 0;
	93
5fcafb7a DH	94	/* which CPU booted us (0xff = not set) */
5fcafb7a DH	95	unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
5fcafb7a	96
1da177e4	97	static void
9ef595d8	98	prom_console_write(struct console con, const char s, unsigned int n)
1da177e4 LT	99	{
	100	prom_write(s, n);
	101	}
	102
7671fa22 SR	103	static struct console prom_early_console = {
7671fa22 SR	104	.name = "earlyprom",
1da177e4	105	.write = prom_console_write,
7671fa22	106	.flags = CON_PRINTBUFFER \| CON_BOOT,
1da177e4 LT	107	.index = -1,
	108	};
	109
1da177e4 LT	110	/*
	111	* Process kernel command line switches that are specific to the
	112	* SPARC or that require special low-level processing.
	113	*/
	114	static void __init process_switch(char c)
	115	{
	116	switch (c) {
	117	case 'd':
	118	boot_flags \|= BOOTME_DEBUG;
	119	break;
	120	case 's':
1da177e4 LT	121	break;
	122	case 'h':
	123	prom_printf("boot_flags_init: Halt!\n");
	124	prom_halt();
	125	break;
	126	case 'p':
11032c17	127	prom_early_console.flags &= ~CON_BOOT;
1da177e4 LT	128	break;
	129	default:
	130	printk("Unknown boot switch (-%c)\n", c);
	131	break;
	132	}
	133	}
	134
1da177e4 LT	135	static void __init boot_flags_init(char *commands)
	136	{
	137	while (*commands) {
	138	/* Move to the start of the next "argument". */
8c64415c	139	while (*commands == ' ')
1da177e4 LT	140	commands++;
	141
	142	/* Process any command switches, otherwise skip it. */
	143	if (*commands == '\0')
	144	break;
	145	if (*commands == '-') {
	146	commands++;
	147	while (commands && commands != ' ')
	148	process_switch(*commands++);
	149	continue;
	150	}
c73fcc84	151	if (!strncmp(commands, "mem=", 4)) {
1da177e4 LT	152	/*
	153	* "mem=XXX[kKmM] overrides the PROM-reported
	154	* memory size.
	155	*/
	156	cmdline_memory_size = simple_strtoul(commands + 4,
	157	&commands, 0);
	158	if (commands == 'K' \|\| commands == 'k') {
	159	cmdline_memory_size <<= 10;
	160	commands++;
	161	} else if (commands=='M' \|\| commands=='m') {
	162	cmdline_memory_size <<= 20;
	163	commands++;
	164	}
	165	}
	166	while (commands && commands != ' ')
	167	commands++;
	168	}
	169	}
	170
1da177e4 LT	171	extern unsigned short root_flags;
	172	extern unsigned short root_dev;
	173	extern unsigned short ram_flags;
	174	#define RAMDISK_IMAGE_START_MASK 0x07FF
	175	#define RAMDISK_PROMPT_FLAG 0x8000
	176	#define RAMDISK_LOAD_FLAG 0x4000
	177
	178	extern int root_mountflags;
	179
	180	char reboot_command[COMMAND_LINE_SIZE];
6943f3da	181
c68e5d39 DM	182	struct cpuid_patch_entry {
	183	unsigned int addr;
	184	unsigned int sun4d[3];
	185	unsigned int leon[3];
	186	};
	187	extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
	188
	189	static void __init per_cpu_patch(void)
	190	{
	191	struct cpuid_patch_entry *p;
	192
	193	if (sparc_cpu_model == sun4m) {
	194	/* Nothing to do, this is what the unpatched code
	195	* targets.
	196	*/
	197	return;
	198	}
	199
	200	p = &__cpuid_patch;
	201	while (p < &__cpuid_patch_end) {
	202	unsigned long addr = p->addr;
	203	unsigned int *insns;
	204
	205	switch (sparc_cpu_model) {
	206	case sun4d:
	207	insns = &p->sun4d[0];
	208	break;
	209
	210	case sparc_leon:
	211	insns = &p->leon[0];
	212	break;
	213	default:
	214	prom_printf("Unknown cpu type, halting.\n");
	215	prom_halt();
	216	}
	217	(unsigned int ) (addr + 0) = insns[0];
1edc1783	218	flushi(addr + 0);
c68e5d39	219	(unsigned int ) (addr + 4) = insns[1];
1edc1783	220	flushi(addr + 4);
c68e5d39	221	(unsigned int ) (addr + 8) = insns[2];
1edc1783	222	flushi(addr + 8);
9cd5f822 SR	223
9cd5f822 SR	224	p++;
c68e5d39	225	}
c68e5d39 DM	226	}
c68e5d39 DM	227
5b8b93c4 SR	228	struct leon_1insn_patch_entry {
	229	unsigned int addr;
	230	unsigned int insn;
	231	};
	232
1da177e4	233	enum sparc_cpu sparc_cpu_model;
6943f3da	234	EXPORT_SYMBOL(sparc_cpu_model);
1da177e4	235
5b8b93c4 SR	236	static __init void leon_patch(void)
	237	{
	238	struct leon_1insn_patch_entry start = (void )__leon_1insn_patch;
	239	struct leon_1insn_patch_entry end = (void )__leon_1insn_patch_end;
	240
	241	/* Default instruction is leon - no patching */
	242	if (sparc_cpu_model == sparc_leon)
	243	return;
	244
	245	while (start < end) {
	246	unsigned long addr = start->addr;
	247
	248	(unsigned int )(addr) = start->insn;
	249	flushi(addr);
	250
	251	start++;
	252	}
	253	}
1da177e4	254
5b8b93c4	255	struct tt_entry *sparc_ttable;
1da177e4	256
4efb55e6 SR	257	/* Called from head_32.S - before we have setup anything
	258	* in the kernel. Be very careful with what you do here.
	259	*/
	260	void __init sparc32_start_kernel(struct linux_romvec *rp)
	261	{
	262	prom_init(rp);
5b8b93c4 SR	263
	264	/* Set sparc_cpu_model */
	265	sparc_cpu_model = sun_unknown;
	266	if (!strcmp(&cputypval[0], "sun4m"))
	267	sparc_cpu_model = sun4m;
	268	if (!strcmp(&cputypval[0], "sun4s"))
	269	sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
	270	if (!strcmp(&cputypval[0], "sun4d"))
	271	sparc_cpu_model = sun4d;
	272	if (!strcmp(&cputypval[0], "sun4e"))
	273	sparc_cpu_model = sun4e;
	274	if (!strcmp(&cputypval[0], "sun4u"))
	275	sparc_cpu_model = sun4u;
	276	if (!strncmp(&cputypval[0], "leon" , 4))
	277	sparc_cpu_model = sparc_leon;
	278
	279	leon_patch();
4efb55e6 SR	280	start_kernel();
	281	}
	282
1da177e4 LT	283	void __init setup_arch(char **cmdline_p)
	284	{
	285	int i;
	286	unsigned long highest_paddr;
	287
7bfba2ca	288	sparc_ttable = &trapbase[0];
1da177e4 LT	289
	290	/* Initialize PROM console and command line. */
	291	*cmdline_p = prom_getbootargs();
bb07972f	292	strscpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
3fbe36d8	293	parse_early_param();
1da177e4	294
7671fa22 SR	295	boot_flags_init(*cmdline_p);
	296
	297	register_console(&prom_early_console);
	298
1da177e4	299	switch(sparc_cpu_model) {
1da177e4	300	case sun4m:
afaffac3	301	pr_info("ARCH: SUN4M\n");
1da177e4 LT	302	break;
1da177e4 LT	303	case sun4d:
afaffac3	304	pr_info("ARCH: SUN4D\n");
1da177e4 LT	305	break;
1da177e4 LT	306	case sun4e:
afaffac3	307	pr_info("ARCH: SUN4E\n");
1da177e4 LT	308	break;
1da177e4 LT	309	case sun4u:
afaffac3	310	pr_info("ARCH: SUN4U\n");
1da177e4	311	break;
0fd7ef1f	312	case sparc_leon:
afaffac3	313	pr_info("ARCH: LEON\n");
0fd7ef1f	314	break;
1da177e4	315	default:
afaffac3	316	pr_info("ARCH: UNKNOWN!\n");
1da177e4	317	break;
6cb79b3f	318	}
1da177e4	319
1da177e4	320	idprom_init();
1da177e4	321	load_mmu();
1da177e4 LT	322
	323	phys_base = 0xffffffffUL;
	324	highest_paddr = 0UL;
	325	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	326	unsigned long top;
	327
	328	if (sp_banks[i].base_addr < phys_base)
	329	phys_base = sp_banks[i].base_addr;
	330	top = sp_banks[i].base_addr +
	331	sp_banks[i].num_bytes;
	332	if (highest_paddr < top)
	333	highest_paddr = top;
	334	}
	335	pfn_base = phys_base >> PAGE_SHIFT;
	336
	337	if (!root_flags)
	338	root_mountflags &= ~MS_RDONLY;
	339	ROOT_DEV = old_decode_dev(root_dev);
5d2170ad	340	#ifdef CONFIG_BLK_DEV_RAM
1da177e4	341	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
1da177e4 LT	342	#endif
	343
	344	prom_setsync(prom_sync_me);
	345
d191723f	346	if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
1da177e4 LT	347	(((short )linux_dbvec) != -1)) {
	348	printk("Booted under KADB. Syncing trap table.\n");
	349	(*(linux_dbvec->teach_debugger))();
	350	}
	351
1edc1783	352	/* Run-time patch instructions to match the cpu model */
c68e5d39 DM	353	per_cpu_patch();
c68e5d39 DM	354
1edc1783 SR	355	paging_init();
1edc1783 SR	356
a23b423e	357	smp_setup_cpu_possible_map();
1da177e4 LT	358	}
1da177e4 LT	359
1da177e4 LT	360	extern int stop_a_enabled;
	361
	362	void sun_do_break(void)
	363	{
	364	if (!stop_a_enabled)
	365	return;
	366
	367	printk("\n");
	368	flush_user_windows();
	369
	370	prom_cmdline();
	371	}
6943f3da	372	EXPORT_SYMBOL(sun_do_break);
1da177e4	373
1da177e4	374	int stop_a_enabled = 1;
a8cbdcea BB	375
	376	static int __init topology_init(void)
	377	{
	378	int i, ncpus, err;
	379
	380	/* Count the number of physically present processors in
	381	* the machine, even on uniprocessor, so that /proc/cpuinfo
	382	* output is consistent with 2.4.x
	383	*/
	384	ncpus = 0;
	385	while (!cpu_find_by_instance(ncpus, NULL, NULL))
	386	ncpus++;
	387	ncpus_probed = ncpus;
	388
	389	err = 0;
	390	for_each_online_cpu(i) {
	391	struct cpu p = kzalloc(sizeof(p), GFP_KERNEL);
	392	if (!p)
	393	err = -ENOMEM;
	394	else
94583779	395	register_cpu(p, i);
a8cbdcea BB	396	}
	397
	398	return err;
	399	}
	400
	401	subsys_initcall(topology_init);
44ade508 TG	402
	403	#if defined(CONFIG_SPARC32) && !defined(CONFIG_SMP)
	404	void __init arch_cpu_finalize_init(void)
	405	{
	406	cpu_data(0).udelay_val = loops_per_jiffy;
	407	}
	408	#endif