chrp_setup.c 14.8 KB
Newer Older
L
Linus Torvalds 已提交
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
/*
 *  arch/ppc/platforms/setup.c
 *
 *  Copyright (C) 1995  Linus Torvalds
 *  Adapted from 'alpha' version by Gary Thomas
 *  Modified by Cort Dougan (cort@cs.nmt.edu)
 */

/*
 * bootup setup stuff..
 */

#include <linux/config.h>
#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/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/version.h>
#include <linux/adb.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <linux/module.h>

#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/gg2.h>
#include <asm/pci-bridge.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/irq.h>
#include <asm/hydra.h>
#include <asm/sections.h>
#include <asm/time.h>
#include <asm/btext.h>
#include <asm/i8259.h>
#include <asm/open_pic.h>
#include <asm/xmon.h>

unsigned long chrp_get_rtc_time(void);
int chrp_set_rtc_time(unsigned long nowtime);
void chrp_calibrate_decr(void);
long chrp_time_init(void);

void chrp_find_bridges(void);
void chrp_event_scan(void);
void rtas_display_progress(char *, unsigned short);
void rtas_indicator_progress(char *, unsigned short);
void btext_progress(char *, unsigned short);

extern unsigned long pmac_find_end_of_memory(void);
extern int of_show_percpuinfo(struct seq_file *, int);

int _chrp_type;
EXPORT_SYMBOL(_chrp_type);

/*
 * XXX this should be in xmon.h, but putting it there means xmon.h
 * has to include <linux/interrupt.h> (to get irqreturn_t), which
 * causes all sorts of problems.  -- paulus
 */
extern irqreturn_t xmon_irq(int, void *, struct pt_regs *);

extern dev_t boot_dev;

extern PTE *Hash, *Hash_end;
extern unsigned long Hash_size, Hash_mask;
extern int probingmem;
extern unsigned long loops_per_jiffy;
static int max_width;

#ifdef CONFIG_SMP
extern struct smp_ops_t chrp_smp_ops;
#endif

static const char *gg2_memtypes[4] = {
	"FPM", "SDRAM", "EDO", "BEDO"
};
static const char *gg2_cachesizes[4] = {
	"256 KB", "512 KB", "1 MB", "Reserved"
};
static const char *gg2_cachetypes[4] = {
	"Asynchronous", "Reserved", "Flow-Through Synchronous",
	"Pipelined Synchronous"
};
static const char *gg2_cachemodes[4] = {
	"Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
};

107
int
L
Linus Torvalds 已提交
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
chrp_show_cpuinfo(struct seq_file *m)
{
	int i, sdramen;
	unsigned int t;
	struct device_node *root;
	const char *model = "";

	root = find_path_device("/");
	if (root)
		model = get_property(root, "model", NULL);
	seq_printf(m, "machine\t\t: CHRP %s\n", model);

	/* longtrail (goldengate) stuff */
	if (!strncmp(model, "IBM,LongTrail", 13)) {
		/* VLSI VAS96011/12 `Golden Gate 2' */
		/* Memory banks */
		sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
			   >>31) & 1;
		for (i = 0; i < (sdramen ? 4 : 6); i++) {
			t = in_le32(gg2_pci_config_base+
						 GG2_PCI_DRAM_BANK0+
						 i*4);
			if (!(t & 1))
				continue;
			switch ((t>>8) & 0x1f) {
			case 0x1f:
				model = "4 MB";
				break;
			case 0x1e:
				model = "8 MB";
				break;
			case 0x1c:
				model = "16 MB";
				break;
			case 0x18:
				model = "32 MB";
				break;
			case 0x10:
				model = "64 MB";
				break;
			case 0x00:
				model = "128 MB";
				break;
			default:
				model = "Reserved";
				break;
			}
			seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
				   gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
		}
		/* L2 cache */
		t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
		seq_printf(m, "board l2\t: %s %s (%s)\n",
			   gg2_cachesizes[(t>>7) & 3],
			   gg2_cachetypes[(t>>2) & 3],
			   gg2_cachemodes[t & 3]);
	}
	return 0;
}

/*
 *  Fixes for the National Semiconductor PC78308VUL SuperI/O
 *
 *  Some versions of Open Firmware incorrectly initialize the IRQ settings
 *  for keyboard and mouse
 */
static inline void __init sio_write(u8 val, u8 index)
{
	outb(index, 0x15c);
	outb(val, 0x15d);
}

static inline u8 __init sio_read(u8 index)
{
	outb(index, 0x15c);
	return inb(0x15d);
}

static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
				     u8 type)
{
	u8 level0, type0, active;

	/* select logical device */
	sio_write(device, 0x07);
	active = sio_read(0x30);
	level0 = sio_read(0x70);
	type0 = sio_read(0x71);
	if (level0 != level || type0 != type || !active) {
		printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
		       "remapping to level %d, type %d, active\n",
		       name, level0, type0, !active ? "in" : "", level, type);
		sio_write(0x01, 0x30);
		sio_write(level, 0x70);
		sio_write(type, 0x71);
	}
}

static void __init sio_init(void)
{
	struct device_node *root;

	if ((root = find_path_device("/")) &&
	    !strncmp(get_property(root, "model", NULL), "IBM,LongTrail", 13)) {
		/* logical device 0 (KBC/Keyboard) */
		sio_fixup_irq("keyboard", 0, 1, 2);
		/* select logical device 1 (KBC/Mouse) */
		sio_fixup_irq("mouse", 1, 12, 2);
	}
}


static void __init pegasos_set_l2cr(void)
{
	struct device_node *np;

	/* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
	if (_chrp_type != _CHRP_Pegasos)
		return;

	/* Enable L2 cache if needed */
	np = find_type_devices("cpu");
	if (np != NULL) {
		unsigned int *l2cr = (unsigned int *)
			get_property (np, "l2cr", NULL);
		if (l2cr == NULL) {
			printk ("Pegasos l2cr : no cpu l2cr property found\n");
			return;
		}
		if (!((*l2cr) & 0x80000000)) {
			printk ("Pegasos l2cr : L2 cache was not active, "
				"activating\n");
			_set_L2CR(0);
			_set_L2CR((*l2cr) | 0x80000000);
		}
	}
}

void __init chrp_setup_arch(void)
{
	struct device_node *device;

	/* init to some ~sane value until calibrate_delay() runs */
	loops_per_jiffy = 50000000/HZ;

#ifdef CONFIG_BLK_DEV_INITRD
	/* this is fine for chrp */
	initrd_below_start_ok = 1;

	if (initrd_start)
		ROOT_DEV = Root_RAM0;
	else
#endif
		ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */

	/* On pegasos, enable the L2 cache if not already done by OF */
	pegasos_set_l2cr();

	/* Lookup PCI host bridges */
	chrp_find_bridges();

#ifndef CONFIG_PPC64BRIDGE
	/*
	 *  Temporary fixes for PCI devices.
	 *  -- Geert
	 */
	hydra_init();		/* Mac I/O */

#endif /* CONFIG_PPC64BRIDGE */

	/*
	 *  Fix the Super I/O configuration
	 */
	sio_init();

	/* Get the event scan rate for the rtas so we know how
	 * often it expects a heartbeat. -- Cort
	 */
	if ( rtas_data ) {
		struct property *p;
		device = find_devices("rtas");
		for ( p = device->properties;
		      p && strncmp(p->name, "rtas-event-scan-rate", 20);
		      p = p->next )
			/* nothing */ ;
		if ( p && *(unsigned long *)p->value ) {
			ppc_md.heartbeat = chrp_event_scan;
			ppc_md.heartbeat_reset = (HZ/(*(unsigned long *)p->value)*30)-1;
			ppc_md.heartbeat_count = 1;
			printk("RTAS Event Scan Rate: %lu (%lu jiffies)\n",
			       *(unsigned long *)p->value, ppc_md.heartbeat_reset );
		}
	}

	pci_create_OF_bus_map();
}

305
void
L
Linus Torvalds 已提交
306 307 308 309 310 311 312 313 314 315
chrp_event_scan(void)
{
	unsigned char log[1024];
	unsigned long ret = 0;
	/* XXX: we should loop until the hardware says no more error logs -- Cort */
	call_rtas( "event-scan", 4, 1, &ret, 0xffffffff, 0,
		   __pa(log), 1024 );
	ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
}

316
void
L
Linus Torvalds 已提交
317 318 319 320 321 322 323
chrp_restart(char *cmd)
{
	printk("RTAS system-reboot returned %d\n",
	       call_rtas("system-reboot", 0, 1, NULL));
	for (;;);
}

324
void
L
Linus Torvalds 已提交
325 326 327 328 329 330 331 332
chrp_power_off(void)
{
	/* allow power on only with power button press */
	printk("RTAS power-off returned %d\n",
	       call_rtas("power-off", 2, 1, NULL,0xffffffff,0xffffffff));
	for (;;);
}

333
void
L
Linus Torvalds 已提交
334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349
chrp_halt(void)
{
	chrp_power_off();
}

/*
 * Finds the open-pic node and sets OpenPIC_Addr based on its reg property.
 * Then checks if it has an interrupt-ranges property.  If it does then
 * we have a distributed open-pic, so call openpic_set_sources to tell
 * the openpic code where to find the interrupt source registers.
 */
static void __init chrp_find_openpic(void)
{
	struct device_node *np;
	int len, i;
	unsigned int *iranges;
350
	void __iomem *isu;
L
Linus Torvalds 已提交
351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493

	np = find_type_devices("open-pic");
	if (np == NULL || np->n_addrs == 0)
		return;
	printk(KERN_INFO "OpenPIC at %x (size %x)\n",
	       np->addrs[0].address, np->addrs[0].size);
	OpenPIC_Addr = ioremap(np->addrs[0].address, 0x40000);
	if (OpenPIC_Addr == NULL) {
		printk(KERN_ERR "Failed to map OpenPIC!\n");
		return;
	}

	iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len);
	if (iranges == NULL || len < 2 * sizeof(unsigned int))
		return;		/* not distributed */

	/*
	 * The first pair of cells in interrupt-ranges refers to the
	 * IDU; subsequent pairs refer to the ISUs.
	 */
	len /= 2 * sizeof(unsigned int);
	if (np->n_addrs < len) {
		printk(KERN_ERR "Insufficient addresses for distributed"
		       " OpenPIC (%d < %d)\n", np->n_addrs, len);
		return;
	}
	if (iranges[1] != 0) {
		printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
		       iranges[0], iranges[0] + iranges[1] - 1);
		openpic_set_sources(iranges[0], iranges[1], NULL);
	}
	for (i = 1; i < len; ++i) {
		iranges += 2;
		printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x (%x)\n",
		       iranges[0], iranges[0] + iranges[1] - 1,
		       np->addrs[i].address, np->addrs[i].size);
		isu = ioremap(np->addrs[i].address, np->addrs[i].size);
		if (isu != NULL)
			openpic_set_sources(iranges[0], iranges[1], isu);
		else
			printk(KERN_ERR "Failed to map OpenPIC ISU at %x!\n",
			       np->addrs[i].address);
	}
}

#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
static struct irqaction xmon_irqaction = {
	.handler = xmon_irq,
	.mask = CPU_MASK_NONE,
	.name = "XMON break",
};
#endif

void __init chrp_init_IRQ(void)
{
	struct device_node *np;
	int i;
	unsigned long chrp_int_ack = 0;
	unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
	struct device_node *kbd;
#endif

	for (np = find_devices("pci"); np != NULL; np = np->next) {
		unsigned int *addrp = (unsigned int *)
			get_property(np, "8259-interrupt-acknowledge", NULL);

		if (addrp == NULL)
			continue;
		chrp_int_ack = addrp[prom_n_addr_cells(np)-1];
		break;
	}
	if (np == NULL)
		printk(KERN_ERR "Cannot find PCI interrupt acknowledge address\n");

	chrp_find_openpic();

	if (OpenPIC_Addr) {
		prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS);
		OpenPIC_InitSenses = init_senses;
		OpenPIC_NumInitSenses = NR_IRQS - NUM_8259_INTERRUPTS;

		openpic_init(NUM_8259_INTERRUPTS);
		/* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
		openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
				       i8259_irq);

	}
	for (i = 0; i < NUM_8259_INTERRUPTS; i++)
		irq_desc[i].handler = &i8259_pic;
	i8259_init(chrp_int_ack);

#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
	/* see if there is a keyboard in the device tree
	   with a parent of type "adb" */
	for (kbd = find_devices("keyboard"); kbd; kbd = kbd->next)
		if (kbd->parent && kbd->parent->type
		    && strcmp(kbd->parent->type, "adb") == 0)
			break;
	if (kbd)
		setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
#endif
}

void __init
chrp_init2(void)
{
#ifdef CONFIG_NVRAM
// XX replace this in a more saner way
//	pmac_nvram_init();
#endif

	request_region(0x20,0x20,"pic1");
	request_region(0xa0,0x20,"pic2");
	request_region(0x00,0x20,"dma1");
	request_region(0x40,0x20,"timer");
	request_region(0x80,0x10,"dma page reg");
	request_region(0xc0,0x20,"dma2");

	if (ppc_md.progress)
		ppc_md.progress("  Have fun!    ", 0x7777);
}

void __init
chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
	  unsigned long r6, unsigned long r7)
{
	struct device_node *root = find_path_device ("/");
	char *machine = NULL;

#ifdef CONFIG_BLK_DEV_INITRD
	/* take care of initrd if we have one */
	if ( r6 )
	{
		initrd_start = r6 + KERNELBASE;
		initrd_end = r6 + r7 + KERNELBASE;
	}
#endif /* CONFIG_BLK_DEV_INITRD */

	ISA_DMA_THRESHOLD = ~0L;
	DMA_MODE_READ = 0x44;
	DMA_MODE_WRITE = 0x48;
	isa_io_base = CHRP_ISA_IO_BASE;		/* default value */
494
	ppc_do_canonicalize_irqs = 1;
L
Linus Torvalds 已提交
495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555

	if (root)
		machine = get_property(root, "model", NULL);
	if (machine && strncmp(machine, "Pegasos", 7) == 0) {
		_chrp_type = _CHRP_Pegasos;
	} else if (machine && strncmp(machine, "IBM", 3) == 0) {
		_chrp_type = _CHRP_IBM;
	} else if (machine && strncmp(machine, "MOT", 3) == 0) {
		_chrp_type = _CHRP_Motorola;
	} else {
		/* Let's assume it is an IBM chrp if all else fails */
		_chrp_type = _CHRP_IBM;
	}

	ppc_md.setup_arch     = chrp_setup_arch;
	ppc_md.show_percpuinfo = of_show_percpuinfo;
	ppc_md.show_cpuinfo   = chrp_show_cpuinfo;

	ppc_md.init_IRQ       = chrp_init_IRQ;
	if (_chrp_type == _CHRP_Pegasos)
		ppc_md.get_irq        = i8259_irq;
	else
		ppc_md.get_irq        = openpic_get_irq;

	ppc_md.init           = chrp_init2;

	ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;

	ppc_md.restart        = chrp_restart;
	ppc_md.power_off      = chrp_power_off;
	ppc_md.halt           = chrp_halt;

	ppc_md.time_init      = chrp_time_init;
	ppc_md.set_rtc_time   = chrp_set_rtc_time;
	ppc_md.get_rtc_time   = chrp_get_rtc_time;
	ppc_md.calibrate_decr = chrp_calibrate_decr;

	ppc_md.find_end_of_memory = pmac_find_end_of_memory;

	if (rtas_data) {
		struct device_node *rtas;
		unsigned int *p;

		rtas = find_devices("rtas");
		if (rtas != NULL) {
			if (get_property(rtas, "display-character", NULL)) {
				ppc_md.progress = rtas_display_progress;
				p = (unsigned int *) get_property
				       (rtas, "ibm,display-line-length", NULL);
				if (p)
					max_width = *p;
			} else if (get_property(rtas, "set-indicator", NULL))
				ppc_md.progress = rtas_indicator_progress;
		}
	}
#ifdef CONFIG_BOOTX_TEXT
	if (ppc_md.progress == NULL && boot_text_mapped)
		ppc_md.progress = btext_progress;
#endif

#ifdef CONFIG_SMP
556
	smp_ops = &chrp_smp_ops;
L
Linus Torvalds 已提交
557 558 559 560 561 562 563 564 565
#endif /* CONFIG_SMP */

	/*
	 * Print the banner, then scroll down so boot progress
	 * can be printed.  -- Cort
	 */
	if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
}

566
void
L
Linus Torvalds 已提交
567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
rtas_display_progress(char *s, unsigned short hex)
{
	int width;
	char *os = s;

	if ( call_rtas( "display-character", 1, 1, NULL, '\r' ) )
		return;

	width = max_width;
	while ( *os )
	{
		if ( (*os == '\n') || (*os == '\r') )
			width = max_width;
		else
			width--;
		call_rtas( "display-character", 1, 1, NULL, *os++ );
		/* if we overwrite the screen length */
		if ( width == 0 )
			while ( (*os != 0) && (*os != '\n') && (*os != '\r') )
				os++;
	}

	/*while ( width-- > 0 )*/
	call_rtas( "display-character", 1, 1, NULL, ' ' );
}

593
void
L
Linus Torvalds 已提交
594 595 596 597 598 599 600 601 602 603 604 605 606
rtas_indicator_progress(char *s, unsigned short hex)
{
	call_rtas("set-indicator", 3, 1, NULL, 6, 0, hex);
}

#ifdef CONFIG_BOOTX_TEXT
void
btext_progress(char *s, unsigned short hex)
{
	prom_print(s);
	prom_print("\n");
}
#endif /* CONFIG_BOOTX_TEXT */