aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/setup.c
blob: 53c192a4982f7210d8bd5587c2f0d99987a86b7b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
/*  $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;

extern void paging_init(void);

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;