[mirror_ubuntu-bionic-kernel.git] / arch / sparc / kernel / setup.c

/*  $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
 *  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/a.out.h>
#include <linux/tty.h>
#include <linux/delay.h>
#include <linux/config.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 <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/kdebug.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;
void (*prom_palette)(int);

/* Pretty sick eh? */
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));

	if (prom_palette)
		prom_palette(1);
	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;
}

unsigned int boot_flags __initdata = 0;
#define BOOTME_DEBUG  0x1
#define BOOTME_SINGLE 0x2

/* 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,
};

int obp_system_intr(void)
{
	if (boot_flags & BOOTME_DEBUG) {
		printk("OBP: system interrupted\n");
		prom_halt();
		return 1;
	}
	return 0;
}

/* 
 * 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':
		boot_flags |= BOOTME_SINGLE;
		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 process_console(char *commands)
{
	serial_console = 0;
	commands += 8;
	/* Linux-style serial */
	if (!strncmp(commands, "ttyS", 4))
		serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
	else if (!strncmp(commands, "tty", 3)) {
		char c = *(commands + 3);
		/* Solaris-style serial */
		if (c == 'a' || c == 'b')
			serial_console = c - 'a' + 1;
		/* else Linux-style fbcon, not serial */
	}
#if defined(CONFIG_PROM_CONSOLE)
	if (!strncmp(commands, "prom", 4)) {
		char *p;

		for (p = commands - 8; *p && *p != ' '; p++)
			*p = ' ';
		conswitchp = &prom_con;
	}
#endif
}

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, "console=", 8)) {
			process_console(commands);
		} else 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 plus the Sparc specific memory
 * physical memory probe as on the alpha.
 */

extern int prom_probe_memory(void);
extern void sun4c_probe_vac(void);
extern char cputypval;
extern unsigned long start, end;
extern void panic_setup(char *, int *);

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(saved_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; }

#ifdef CONFIG_SUN4
	if (sparc_cpu_model != sun4) {
		prom_printf("This kernel is for Sun4 architecture only.\n");
		prom_halt();
	}
#endif
	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_SUN4)
		sun4c_probe_vac();
	load_mmu();
	(void) prom_probe_memory();

	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_INITRD
	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();
}

static int __init set_preferred_console(void)
{
	int idev, odev;

	/* The user has requested a console so this is already set up. */
	if (serial_console >= 0)
		return -EBUSY;

	idev = prom_query_input_device();
	odev = prom_query_output_device();
	if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
		serial_console = 0;
	} else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
		serial_console = 1;
	} else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
		serial_console = 2;
	} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
		prom_printf("MrCoffee ttya\n");
		serial_console = 1;
	} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
		serial_console = 0;
		prom_printf("MrCoffee keyboard\n");
	} else {
		prom_printf("Confusing console (idev %d, odev %d)\n",
		    idev, odev);
		serial_console = 1;
	}

	if (serial_console)
		return add_preferred_console("ttyS", serial_console - 1, NULL);

	return -ENODEV;
}
console_initcall(set_preferred_console);

extern char *sparc_cpu_type;
extern char *sparc_fpu_type;

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,
		   num_possible_cpus(),
		   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)
{
}

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 serial_console = -1;
int stop_a_enabled = 1;
Commit	Line	Data
1da177e4 LT	1	/* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
	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>
	19	#include <linux/a.out.h>
	20	#include <linux/tty.h>
	21	#include <linux/delay.h>
	22	#include <linux/config.h>
	23	#include <linux/fs.h>
	24	#include <linux/seq_file.h>
	25	#include <linux/syscalls.h>
	26	#include <linux/kdev_t.h>
	27	#include <linux/major.h>
	28	#include <linux/string.h>
	29	#include <linux/init.h>
	30	#include <linux/interrupt.h>
	31	#include <linux/console.h>
	32	#include <linux/spinlock.h>
	33	#include <linux/root_dev.h>
	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>
	43	#include <asm/kdebug.h>
	44	#include <asm/mbus.h>
	45	#include <asm/idprom.h>
	46	#include <asm/machines.h>
	47	#include <asm/cpudata.h>
	48	#include <asm/setup.h>
	49
	50	struct screen_info screen_info = {
	51	0, 0, /* orig-x, orig-y */
	52	0, /* unused */
	53	0, /* orig-video-page */
	54	0, /* orig-video-mode */
	55	128, /* orig-video-cols */
	56	0,0,0, /* ega_ax, ega_bx, ega_cx */
	57	54, /* orig-video-lines */
	58	0, /* orig-video-isVGA */
	59	16 /* orig-video-points */
	60	};
	61
	62	/* Typing sync at the prom prompt calls the function pointed to by
	63	* romvec->pv_synchook which I set to the following function.
	64	* This should sync all filesystems and return, for now it just
	65	* prints out pretty messages and returns.
	66	*/
	67
	68	extern unsigned long trapbase;
	69	void (*prom_palette)(int);
	70
	71	/* Pretty sick eh? */
	72	void prom_sync_me(void)
	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
	84	if (prom_palette)
	85	prom_palette(1);
	86	prom_printf("PROM SYNC COMMAND...\n");
	87	show_free_areas();
	88	if(current->pid != 0) {
	89	local_irq_enable();
	90	sys_sync();
	91	local_irq_disable();
	92	}
	93	prom_printf("Returning to prom\n");
	94
	95	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
	96	"nop\n\t"
	97	"nop\n\t"
	98	"nop\n\t" : : "r" (prom_tbr));
99	local_irq_restore(flags);
100
101	return;
102	}
103
104	unsigned int boot_flags __initdata = 0;
105	#define BOOTME_DEBUG 0x1
106	#define BOOTME_SINGLE 0x2
107
108	/* Exported for mm/init.c:paging_init. */
109	unsigned long cmdline_memory_size __initdata = 0;
110
111	static void
112	prom_console_write(struct console con, const char s, unsigned n)
113	{
114	prom_write(s, n);
115	}
116
117	static struct console prom_debug_console = {
118	.name = "debug",
119	.write = prom_console_write,
120	.flags = CON_PRINTBUFFER,
121	.index = -1,
122	};
123
124	int obp_system_intr(void)
125	{
126	if (boot_flags & BOOTME_DEBUG) {
127	printk("OBP: system interrupted\n");
128	prom_halt();
129	return 1;
130	}
131	return 0;
132	}
133
134	/*
135	* Process kernel command line switches that are specific to the
136	* SPARC or that require special low-level processing.
137	*/
138	static void __init process_switch(char c)
139	{
140	switch (c) {
141	case 'd':
142	boot_flags \|= BOOTME_DEBUG;
143	break;
144	case 's':
145	boot_flags \|= BOOTME_SINGLE;
146	break;
147	case 'h':
148	prom_printf("boot_flags_init: Halt!\n");
149	prom_halt();
150	break;
151	case 'p':
152	/* Use PROM debug console. */
153	register_console(&prom_debug_console);
154	break;
155	default:
156	printk("Unknown boot switch (-%c)\n", c);
157	break;
158	}
159	}
160
161	static void __init process_console(char *commands)
162	{
163	serial_console = 0;
164	commands += 8;
165	/* Linux-style serial */
166	if (!strncmp(commands, "ttyS", 4))
167	serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
168	else if (!strncmp(commands, "tty", 3)) {
169	char c = *(commands + 3);
170	/* Solaris-style serial */
171	if (c == 'a' \|\| c == 'b')
172	serial_console = c - 'a' + 1;
173	/* else Linux-style fbcon, not serial */
174	}
175	#if defined(CONFIG_PROM_CONSOLE)
176	if (!strncmp(commands, "prom", 4)) {
177	char *p;
178
179	for (p = commands - 8; p && p != ' '; p++)
180	*p = ' ';
181	conswitchp = &prom_con;
182	}
183	#endif
184	}
185
186	static void __init boot_flags_init(char *commands)
187	{
188	while (*commands) {
189	/* Move to the start of the next "argument". */
190	while (commands && commands == ' ')
191	commands++;
192
193	/* Process any command switches, otherwise skip it. */
194	if (*commands == '\0')
195	break;
196	if (*commands == '-') {
197	commands++;
198	while (commands && commands != ' ')
199	process_switch(*commands++);
200	continue;
201	}
202	if (!strncmp(commands, "console=", 8)) {
203	process_console(commands);
204	} else if (!strncmp(commands, "mem=", 4)) {
205	/*
206	* "mem=XXX[kKmM] overrides the PROM-reported
207	* memory size.
208	*/
209	cmdline_memory_size = simple_strtoul(commands + 4,
210	&commands, 0);
211	if (commands == 'K' \|\| commands == 'k') {
212	cmdline_memory_size <<= 10;
213	commands++;
214	} else if (commands=='M' \|\| commands=='m') {
215	cmdline_memory_size <<= 20;
216	commands++;
217	}
218	}
219	while (commands && commands != ' ')
220	commands++;
221	}
222	}
223
224	/* This routine will in the future do all the nasty prom stuff
225	* to probe for the mmu type and its parameters, etc. This will
226	* also be where SMP things happen plus the Sparc specific memory
227	* physical memory probe as on the alpha.
228	*/
229
230	extern int prom_probe_memory(void);
231	extern void sun4c_probe_vac(void);
232	extern char cputypval;
233	extern unsigned long start, end;
234	extern void panic_setup(char , int );
235
236	extern unsigned short root_flags;
237	extern unsigned short root_dev;
238	extern unsigned short ram_flags;
239	#define RAMDISK_IMAGE_START_MASK 0x07FF
240	#define RAMDISK_PROMPT_FLAG 0x8000
241	#define RAMDISK_LOAD_FLAG 0x4000
242
243	extern int root_mountflags;
244
245	char reboot_command[COMMAND_LINE_SIZE];
246	enum sparc_cpu sparc_cpu_model;
247
248	struct tt_entry *sparc_ttable;
249
250	struct pt_regs fake_swapper_regs;
251
1da177e4 LT	252	void __init setup_arch(char **cmdline_p)
	253	{
	254	int i;
	255	unsigned long highest_paddr;
	256
	257	sparc_ttable = (struct tt_entry *) &start;
	258
	259	/* Initialize PROM console and command line. */
	260	*cmdline_p = prom_getbootargs();
	261	strcpy(saved_command_line, *cmdline_p);
	262
	263	/* Set sparc_cpu_model */
	264	sparc_cpu_model = sun_unknown;
	265	if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
	266	if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
	267	if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
	268	if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */
	269	if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
	270	if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
	271	if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
	272
	273	#ifdef CONFIG_SUN4
	274	if (sparc_cpu_model != sun4) {
	275	prom_printf("This kernel is for Sun4 architecture only.\n");
	276	prom_halt();
	277	}
	278	#endif
	279	printk("ARCH: ");
	280	switch(sparc_cpu_model) {
	281	case sun4:
	282	printk("SUN4\n");
	283	break;
	284	case sun4c:
	285	printk("SUN4C\n");
	286	break;
	287	case sun4m:
	288	printk("SUN4M\n");
	289	break;
	290	case sun4d:
	291	printk("SUN4D\n");
	292	break;
	293	case sun4e:
	294	printk("SUN4E\n");
	295	break;
	296	case sun4u:
	297	printk("SUN4U\n");
	298	break;
	299	default:
	300	printk("UNKNOWN!\n");
	301	break;
	302	};
	303
	304	#ifdef CONFIG_DUMMY_CONSOLE
	305	conswitchp = &dummy_con;
	306	#elif defined(CONFIG_PROM_CONSOLE)
	307	conswitchp = &prom_con;
	308	#endif
	309	boot_flags_init(*cmdline_p);
	310
	311	idprom_init();
	312	if (ARCH_SUN4C_SUN4)
	313	sun4c_probe_vac();
	314	load_mmu();
	315	(void) prom_probe_memory();
316
317	phys_base = 0xffffffffUL;
318	highest_paddr = 0UL;
319	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
320	unsigned long top;
321
322	if (sp_banks[i].base_addr < phys_base)
323	phys_base = sp_banks[i].base_addr;
324	top = sp_banks[i].base_addr +
325	sp_banks[i].num_bytes;
326	if (highest_paddr < top)
327	highest_paddr = top;
328	}
329	pfn_base = phys_base >> PAGE_SHIFT;
330
331	if (!root_flags)
332	root_mountflags &= ~MS_RDONLY;
333	ROOT_DEV = old_decode_dev(root_dev);
334	#ifdef CONFIG_BLK_DEV_INITRD
335	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
336	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
337	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
338	#endif
339
340	prom_setsync(prom_sync_me);
341
342	if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
343	(((short )linux_dbvec) != -1)) {
344	printk("Booted under KADB. Syncing trap table.\n");
345	(*(linux_dbvec->teach_debugger))();
346	}
347
348	init_mm.context = (unsigned long) NO_CONTEXT;
349	init_task.thread.kregs = &fake_swapper_regs;
350
351	paging_init();
352	}
353
354	static int __init set_preferred_console(void)
355	{
356	int idev, odev;
357
358	/* The user has requested a console so this is already set up. */
359	if (serial_console >= 0)
360	return -EBUSY;
361
362	idev = prom_query_input_device();
363	odev = prom_query_output_device();
364	if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
365	serial_console = 0;
366	} else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
367	serial_console = 1;
368	} else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
369	serial_console = 2;
370	} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
371	prom_printf("MrCoffee ttya\n");
372	serial_console = 1;
373	} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
374	serial_console = 0;
375	prom_printf("MrCoffee keyboard\n");
376	} else {
377	prom_printf("Confusing console (idev %d, odev %d)\n",
378	idev, odev);
379	serial_console = 1;
380	}
381
382	if (serial_console)
383	return add_preferred_console("ttyS", serial_console - 1, NULL);
384
385	return -ENODEV;
386	}
387	console_initcall(set_preferred_console);
388
389	extern char *sparc_cpu_type;
390	extern char *sparc_fpu_type;
391
392	static int show_cpuinfo(struct seq_file m, void __unused)
393	{
394	seq_printf(m,
395	"cpu\t\t: %s\n"
396	"fpu\t\t: %s\n"
397	"promlib\t\t: Version %d Revision %d\n"
398	"prom\t\t: %d.%d\n"
399	"type\t\t: %s\n"
400	"ncpus probed\t: %d\n"
401	"ncpus active\t: %d\n"
402	#ifndef CONFIG_SMP
403	"CPU0Bogo\t: %lu.%02lu\n"
404	"CPU0ClkTck\t: %ld\n"
405	#endif
406	,
407	sparc_cpu_type ? sparc_cpu_type : "undetermined",
408	sparc_fpu_type ? sparc_fpu_type : "undetermined",
409	romvec->pv_romvers,
410	prom_rev,
411	romvec->pv_printrev >> 16,
412	romvec->pv_printrev & 0xffff,
413	&cputypval,
414	num_possible_cpus(),
415	num_online_cpus()
416	#ifndef CONFIG_SMP
417	, cpu_data(0).udelay_val/(500000/HZ),
418	(cpu_data(0).udelay_val/(5000/HZ)) % 100,
419	cpu_data(0).clock_tick
420	#endif
421	);
422
423	#ifdef CONFIG_SMP
424	smp_bogo(m);
425	#endif
426	mmu_info(m);
427	#ifdef CONFIG_SMP
428	smp_info(m);
429	#endif
430	return 0;
431	}
432
433	static void c_start(struct seq_file m, loff_t *pos)
434	{
435	/* The pointer we are returning is arbitrary,
436	* it just has to be non-NULL and not IS_ERR
437	* in the success case.
438	*/
439	return *pos == 0 ? &c_start : NULL;
440	}
441
442	static void c_next(struct seq_file m, void v, loff_t pos)
443	{
444	++*pos;
445	return c_start(m, pos);
446	}
447
448	static void c_stop(struct seq_file m, void v)
449	{
450	}
451
452	struct seq_operations cpuinfo_op = {
453	.start =c_start,
454	.next = c_next,
455	.stop = c_stop,
456	.show = show_cpuinfo,
457	};
458
459	extern int stop_a_enabled;
460
461	void sun_do_break(void)
462	{
463	if (!stop_a_enabled)
464	return;
465
466	printk("\n");
467	flush_user_windows();
468
469	prom_cmdline();
470	}
471
472	int serial_console = -1;
473	int stop_a_enabled = 1;