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/arch/alpha/kernel/setup.c

https://gitlab.com/vogoplayer-tools/xz0032-linux
C | 1514 lines | 1111 code | 191 blank | 212 comment | 170 complexity | 09636806f542ba25b951c777fc3c1458 MD5 | raw file
   1/*
   2 *  linux/arch/alpha/kernel/setup.c
   3 *
   4 *  Copyright (C) 1995  Linus Torvalds
   5 */
   6
   7/* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
   8
   9/*
  10 * Bootup setup stuff.
  11 */
  12
  13#include <linux/sched.h>
  14#include <linux/kernel.h>
  15#include <linux/mm.h>
  16#include <linux/stddef.h>
  17#include <linux/unistd.h>
  18#include <linux/ptrace.h>
  19#include <linux/slab.h>
  20#include <linux/user.h>
  21#include <linux/screen_info.h>
  22#include <linux/delay.h>
  23#include <linux/mc146818rtc.h>
  24#include <linux/console.h>
  25#include <linux/cpu.h>
  26#include <linux/errno.h>
  27#include <linux/init.h>
  28#include <linux/string.h>
  29#include <linux/ioport.h>
  30#include <linux/platform_device.h>
  31#include <linux/bootmem.h>
  32#include <linux/pci.h>
  33#include <linux/seq_file.h>
  34#include <linux/root_dev.h>
  35#include <linux/initrd.h>
  36#include <linux/eisa.h>
  37#include <linux/pfn.h>
  38#ifdef CONFIG_MAGIC_SYSRQ
  39#include <linux/sysrq.h>
  40#include <linux/reboot.h>
  41#endif
  42#include <linux/notifier.h>
  43#include <asm/setup.h>
  44#include <asm/io.h>
  45#include <linux/log2.h>
  46
  47extern struct atomic_notifier_head panic_notifier_list;
  48static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
  49static struct notifier_block alpha_panic_block = {
  50	alpha_panic_event,
  51        NULL,
  52        INT_MAX /* try to do it first */
  53};
  54
  55#include <asm/uaccess.h>
  56#include <asm/pgtable.h>
  57#include <asm/system.h>
  58#include <asm/hwrpb.h>
  59#include <asm/dma.h>
  60#include <asm/mmu_context.h>
  61#include <asm/console.h>
  62
  63#include "proto.h"
  64#include "pci_impl.h"
  65
  66
  67struct hwrpb_struct *hwrpb;
  68EXPORT_SYMBOL(hwrpb);
  69unsigned long srm_hae;
  70
  71int alpha_l1i_cacheshape;
  72int alpha_l1d_cacheshape;
  73int alpha_l2_cacheshape;
  74int alpha_l3_cacheshape;
  75
  76#ifdef CONFIG_VERBOSE_MCHECK
  77/* 0=minimum, 1=verbose, 2=all */
  78/* These can be overridden via the command line, ie "verbose_mcheck=2") */
  79unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
  80#endif
  81
  82#ifdef CONFIG_NUMA
  83struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
  84EXPORT_SYMBOL(node_to_cpumask_map);
  85#endif
  86
  87/* Which processor we booted from.  */
  88int boot_cpuid;
  89
  90/*
  91 * Using SRM callbacks for initial console output. This works from
  92 * setup_arch() time through the end of time_init(), as those places
  93 * are under our (Alpha) control.
  94
  95 * "srmcons" specified in the boot command arguments allows us to
  96 * see kernel messages during the period of time before the true
  97 * console device is "registered" during console_init(). 
  98 * As of this version (2.5.59), console_init() will call
  99 * disable_early_printk() as the last action before initializing
 100 * the console drivers. That's the last possible time srmcons can be 
 101 * unregistered without interfering with console behavior.
 102 *
 103 * By default, OFF; set it with a bootcommand arg of "srmcons" or 
 104 * "console=srm". The meaning of these two args is:
 105 *     "srmcons"     - early callback prints 
 106 *     "console=srm" - full callback based console, including early prints
 107 */
 108int srmcons_output = 0;
 109
 110/* Enforce a memory size limit; useful for testing. By default, none. */
 111unsigned long mem_size_limit = 0;
 112
 113/* Set AGP GART window size (0 means disabled). */
 114unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
 115
 116#ifdef CONFIG_ALPHA_GENERIC
 117struct alpha_machine_vector alpha_mv;
 118int alpha_using_srm;
 119EXPORT_SYMBOL(alpha_using_srm);
 120#endif
 121
 122static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
 123					       unsigned long);
 124static struct alpha_machine_vector *get_sysvec_byname(const char *);
 125static void get_sysnames(unsigned long, unsigned long, unsigned long,
 126			 char **, char **);
 127static void determine_cpu_caches (unsigned int);
 128
 129static char __initdata command_line[COMMAND_LINE_SIZE];
 130
 131/*
 132 * The format of "screen_info" is strange, and due to early
 133 * i386-setup code. This is just enough to make the console
 134 * code think we're on a VGA color display.
 135 */
 136
 137struct screen_info screen_info = {
 138	.orig_x = 0,
 139	.orig_y = 25,
 140	.orig_video_cols = 80,
 141	.orig_video_lines = 25,
 142	.orig_video_isVGA = 1,
 143	.orig_video_points = 16
 144};
 145
 146EXPORT_SYMBOL(screen_info);
 147
 148/*
 149 * The direct map I/O window, if any.  This should be the same
 150 * for all busses, since it's used by virt_to_bus.
 151 */
 152
 153unsigned long __direct_map_base;
 154unsigned long __direct_map_size;
 155EXPORT_SYMBOL(__direct_map_base);
 156EXPORT_SYMBOL(__direct_map_size);
 157
 158/*
 159 * Declare all of the machine vectors.
 160 */
 161
 162/* GCC 2.7.2 (on alpha at least) is lame.  It does not support either 
 163   __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
 164   to the assembler.  */
 165
 166#define WEAK(X) \
 167	extern struct alpha_machine_vector X; \
 168	asm(".weak "#X)
 169
 170WEAK(alcor_mv);
 171WEAK(alphabook1_mv);
 172WEAK(avanti_mv);
 173WEAK(cabriolet_mv);
 174WEAK(clipper_mv);
 175WEAK(dp264_mv);
 176WEAK(eb164_mv);
 177WEAK(eb64p_mv);
 178WEAK(eb66_mv);
 179WEAK(eb66p_mv);
 180WEAK(eiger_mv);
 181WEAK(jensen_mv);
 182WEAK(lx164_mv);
 183WEAK(lynx_mv);
 184WEAK(marvel_ev7_mv);
 185WEAK(miata_mv);
 186WEAK(mikasa_mv);
 187WEAK(mikasa_primo_mv);
 188WEAK(monet_mv);
 189WEAK(nautilus_mv);
 190WEAK(noname_mv);
 191WEAK(noritake_mv);
 192WEAK(noritake_primo_mv);
 193WEAK(p2k_mv);
 194WEAK(pc164_mv);
 195WEAK(privateer_mv);
 196WEAK(rawhide_mv);
 197WEAK(ruffian_mv);
 198WEAK(rx164_mv);
 199WEAK(sable_mv);
 200WEAK(sable_gamma_mv);
 201WEAK(shark_mv);
 202WEAK(sx164_mv);
 203WEAK(takara_mv);
 204WEAK(titan_mv);
 205WEAK(webbrick_mv);
 206WEAK(wildfire_mv);
 207WEAK(xl_mv);
 208WEAK(xlt_mv);
 209
 210#undef WEAK
 211
 212/*
 213 * I/O resources inherited from PeeCees.  Except for perhaps the
 214 * turbochannel alphas, everyone has these on some sort of SuperIO chip.
 215 *
 216 * ??? If this becomes less standard, move the struct out into the
 217 * machine vector.
 218 */
 219
 220static void __init
 221reserve_std_resources(void)
 222{
 223	static struct resource standard_io_resources[] = {
 224		{ .name = "rtc", .start = -1, .end = -1 },
 225        	{ .name = "dma1", .start = 0x00, .end = 0x1f },
 226        	{ .name = "pic1", .start = 0x20, .end = 0x3f },
 227        	{ .name = "timer", .start = 0x40, .end = 0x5f },
 228        	{ .name = "keyboard", .start = 0x60, .end = 0x6f },
 229        	{ .name = "dma page reg", .start = 0x80, .end = 0x8f },
 230        	{ .name = "pic2", .start = 0xa0, .end = 0xbf },
 231        	{ .name = "dma2", .start = 0xc0, .end = 0xdf },
 232	};
 233
 234	struct resource *io = &ioport_resource;
 235	size_t i;
 236
 237	if (hose_head) {
 238		struct pci_controller *hose;
 239		for (hose = hose_head; hose; hose = hose->next)
 240			if (hose->index == 0) {
 241				io = hose->io_space;
 242				break;
 243			}
 244	}
 245
 246	/* Fix up for the Jensen's queer RTC placement.  */
 247	standard_io_resources[0].start = RTC_PORT(0);
 248	standard_io_resources[0].end = RTC_PORT(0) + 0x10;
 249
 250	for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
 251		request_resource(io, standard_io_resources+i);
 252}
 253
 254#define PFN_MAX		PFN_DOWN(0x80000000)
 255#define for_each_mem_cluster(memdesc, _cluster, i)		\
 256	for ((_cluster) = (memdesc)->cluster, (i) = 0;		\
 257	     (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
 258
 259static unsigned long __init
 260get_mem_size_limit(char *s)
 261{
 262        unsigned long end = 0;
 263        char *from = s;
 264
 265        end = simple_strtoul(from, &from, 0);
 266        if ( *from == 'K' || *from == 'k' ) {
 267                end = end << 10;
 268                from++;
 269        } else if ( *from == 'M' || *from == 'm' ) {
 270                end = end << 20;
 271                from++;
 272        } else if ( *from == 'G' || *from == 'g' ) {
 273                end = end << 30;
 274                from++;
 275        }
 276        return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
 277}
 278
 279#ifdef CONFIG_BLK_DEV_INITRD
 280void * __init
 281move_initrd(unsigned long mem_limit)
 282{
 283	void *start;
 284	unsigned long size;
 285
 286	size = initrd_end - initrd_start;
 287	start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
 288	if (!start || __pa(start) + size > mem_limit) {
 289		initrd_start = initrd_end = 0;
 290		return NULL;
 291	}
 292	memmove(start, (void *)initrd_start, size);
 293	initrd_start = (unsigned long)start;
 294	initrd_end = initrd_start + size;
 295	printk("initrd moved to %p\n", start);
 296	return start;
 297}
 298#endif
 299
 300#ifndef CONFIG_DISCONTIGMEM
 301static void __init
 302setup_memory(void *kernel_end)
 303{
 304	struct memclust_struct * cluster;
 305	struct memdesc_struct * memdesc;
 306	unsigned long start_kernel_pfn, end_kernel_pfn;
 307	unsigned long bootmap_size, bootmap_pages, bootmap_start;
 308	unsigned long start, end;
 309	unsigned long i;
 310
 311	/* Find free clusters, and init and free the bootmem accordingly.  */
 312	memdesc = (struct memdesc_struct *)
 313	  (hwrpb->mddt_offset + (unsigned long) hwrpb);
 314
 315	for_each_mem_cluster(memdesc, cluster, i) {
 316		printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
 317		       i, cluster->usage, cluster->start_pfn,
 318		       cluster->start_pfn + cluster->numpages);
 319
 320		/* Bit 0 is console/PALcode reserved.  Bit 1 is
 321		   non-volatile memory -- we might want to mark
 322		   this for later.  */
 323		if (cluster->usage & 3)
 324			continue;
 325
 326		end = cluster->start_pfn + cluster->numpages;
 327		if (end > max_low_pfn)
 328			max_low_pfn = end;
 329	}
 330
 331	/*
 332	 * Except for the NUMA systems (wildfire, marvel) all of the 
 333	 * Alpha systems we run on support 32GB of memory or less.
 334	 * Since the NUMA systems introduce large holes in memory addressing,
 335	 * we can get into a situation where there is not enough contiguous
 336	 * memory for the memory map. 
 337	 *
 338	 * Limit memory to the first 32GB to limit the NUMA systems to 
 339	 * memory on their first node (wildfire) or 2 (marvel) to avoid 
 340	 * not being able to produce the memory map. In order to access 
 341	 * all of the memory on the NUMA systems, build with discontiguous
 342	 * memory support.
 343	 *
 344	 * If the user specified a memory limit, let that memory limit stand.
 345	 */
 346	if (!mem_size_limit) 
 347		mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
 348
 349	if (mem_size_limit && max_low_pfn >= mem_size_limit)
 350	{
 351		printk("setup: forcing memory size to %ldK (from %ldK).\n",
 352		       mem_size_limit << (PAGE_SHIFT - 10),
 353		       max_low_pfn    << (PAGE_SHIFT - 10));
 354		max_low_pfn = mem_size_limit;
 355	}
 356
 357	/* Find the bounds of kernel memory.  */
 358	start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
 359	end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
 360	bootmap_start = -1;
 361
 362 try_again:
 363	if (max_low_pfn <= end_kernel_pfn)
 364		panic("not enough memory to boot");
 365
 366	/* We need to know how many physically contiguous pages
 367	   we'll need for the bootmap.  */
 368	bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
 369
 370	/* Now find a good region where to allocate the bootmap.  */
 371	for_each_mem_cluster(memdesc, cluster, i) {
 372		if (cluster->usage & 3)
 373			continue;
 374
 375		start = cluster->start_pfn;
 376		end = start + cluster->numpages;
 377		if (start >= max_low_pfn)
 378			continue;
 379		if (end > max_low_pfn)
 380			end = max_low_pfn;
 381		if (start < start_kernel_pfn) {
 382			if (end > end_kernel_pfn
 383			    && end - end_kernel_pfn >= bootmap_pages) {
 384				bootmap_start = end_kernel_pfn;
 385				break;
 386			} else if (end > start_kernel_pfn)
 387				end = start_kernel_pfn;
 388		} else if (start < end_kernel_pfn)
 389			start = end_kernel_pfn;
 390		if (end - start >= bootmap_pages) {
 391			bootmap_start = start;
 392			break;
 393		}
 394	}
 395
 396	if (bootmap_start == ~0UL) {
 397		max_low_pfn >>= 1;
 398		goto try_again;
 399	}
 400
 401	/* Allocate the bootmap and mark the whole MM as reserved.  */
 402	bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
 403
 404	/* Mark the free regions.  */
 405	for_each_mem_cluster(memdesc, cluster, i) {
 406		if (cluster->usage & 3)
 407			continue;
 408
 409		start = cluster->start_pfn;
 410		end = cluster->start_pfn + cluster->numpages;
 411		if (start >= max_low_pfn)
 412			continue;
 413		if (end > max_low_pfn)
 414			end = max_low_pfn;
 415		if (start < start_kernel_pfn) {
 416			if (end > end_kernel_pfn) {
 417				free_bootmem(PFN_PHYS(start),
 418					     (PFN_PHYS(start_kernel_pfn)
 419					      - PFN_PHYS(start)));
 420				printk("freeing pages %ld:%ld\n",
 421				       start, start_kernel_pfn);
 422				start = end_kernel_pfn;
 423			} else if (end > start_kernel_pfn)
 424				end = start_kernel_pfn;
 425		} else if (start < end_kernel_pfn)
 426			start = end_kernel_pfn;
 427		if (start >= end)
 428			continue;
 429
 430		free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
 431		printk("freeing pages %ld:%ld\n", start, end);
 432	}
 433
 434	/* Reserve the bootmap memory.  */
 435	reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size,
 436			BOOTMEM_DEFAULT);
 437	printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
 438
 439#ifdef CONFIG_BLK_DEV_INITRD
 440	initrd_start = INITRD_START;
 441	if (initrd_start) {
 442		initrd_end = initrd_start+INITRD_SIZE;
 443		printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
 444		       (void *) initrd_start, INITRD_SIZE);
 445
 446		if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
 447			if (!move_initrd(PFN_PHYS(max_low_pfn)))
 448				printk("initrd extends beyond end of memory "
 449				       "(0x%08lx > 0x%p)\ndisabling initrd\n",
 450				       initrd_end,
 451				       phys_to_virt(PFN_PHYS(max_low_pfn)));
 452		} else {
 453			reserve_bootmem(virt_to_phys((void *)initrd_start),
 454					INITRD_SIZE, BOOTMEM_DEFAULT);
 455		}
 456	}
 457#endif /* CONFIG_BLK_DEV_INITRD */
 458}
 459#else
 460extern void setup_memory(void *);
 461#endif /* !CONFIG_DISCONTIGMEM */
 462
 463int __init
 464page_is_ram(unsigned long pfn)
 465{
 466	struct memclust_struct * cluster;
 467	struct memdesc_struct * memdesc;
 468	unsigned long i;
 469
 470	memdesc = (struct memdesc_struct *)
 471		(hwrpb->mddt_offset + (unsigned long) hwrpb);
 472	for_each_mem_cluster(memdesc, cluster, i)
 473	{
 474		if (pfn >= cluster->start_pfn  &&
 475		    pfn < cluster->start_pfn + cluster->numpages) {
 476			return (cluster->usage & 3) ? 0 : 1;
 477		}
 478	}
 479
 480	return 0;
 481}
 482
 483static int __init
 484register_cpus(void)
 485{
 486	int i;
 487
 488	for_each_possible_cpu(i) {
 489		struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
 490		if (!p)
 491			return -ENOMEM;
 492		register_cpu(p, i);
 493	}
 494	return 0;
 495}
 496
 497arch_initcall(register_cpus);
 498
 499void __init
 500setup_arch(char **cmdline_p)
 501{
 502	extern char _end[];
 503
 504	struct alpha_machine_vector *vec = NULL;
 505	struct percpu_struct *cpu;
 506	char *type_name, *var_name, *p;
 507	void *kernel_end = _end; /* end of kernel */
 508	char *args = command_line;
 509
 510	hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
 511	boot_cpuid = hard_smp_processor_id();
 512
 513        /*
 514	 * Pre-process the system type to make sure it will be valid.
 515	 *
 516	 * This may restore real CABRIO and EB66+ family names, ie
 517	 * EB64+ and EB66.
 518	 *
 519	 * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
 520	 * and AS1200 (DIGITAL Server 5000 series) have the type as
 521	 * the negative of the real one.
 522	 */
 523        if ((long)hwrpb->sys_type < 0) {
 524		hwrpb->sys_type = -((long)hwrpb->sys_type);
 525		hwrpb_update_checksum(hwrpb);
 526	}
 527
 528	/* Register a call for panic conditions. */
 529	atomic_notifier_chain_register(&panic_notifier_list,
 530			&alpha_panic_block);
 531
 532#ifdef CONFIG_ALPHA_GENERIC
 533	/* Assume that we've booted from SRM if we haven't booted from MILO.
 534	   Detect the later by looking for "MILO" in the system serial nr.  */
 535	alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
 536#endif
 537
 538	/* If we are using SRM, we want to allow callbacks
 539	   as early as possible, so do this NOW, and then
 540	   they should work immediately thereafter.
 541	*/
 542	kernel_end = callback_init(kernel_end);
 543
 544	/* 
 545	 * Locate the command line.
 546	 */
 547	/* Hack for Jensen... since we're restricted to 8 or 16 chars for
 548	   boot flags depending on the boot mode, we need some shorthand.
 549	   This should do for installation.  */
 550	if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
 551		strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
 552	} else {
 553		strlcpy(command_line, COMMAND_LINE, sizeof command_line);
 554	}
 555	strcpy(boot_command_line, command_line);
 556	*cmdline_p = command_line;
 557
 558	/* 
 559	 * Process command-line arguments.
 560	 */
 561	while ((p = strsep(&args, " \t")) != NULL) {
 562		if (!*p) continue;
 563		if (strncmp(p, "alpha_mv=", 9) == 0) {
 564			vec = get_sysvec_byname(p+9);
 565			continue;
 566		}
 567		if (strncmp(p, "cycle=", 6) == 0) {
 568			est_cycle_freq = simple_strtol(p+6, NULL, 0);
 569			continue;
 570		}
 571		if (strncmp(p, "mem=", 4) == 0) {
 572			mem_size_limit = get_mem_size_limit(p+4);
 573			continue;
 574		}
 575		if (strncmp(p, "srmcons", 7) == 0) {
 576			srmcons_output |= 1;
 577			continue;
 578		}
 579		if (strncmp(p, "console=srm", 11) == 0) {
 580			srmcons_output |= 2;
 581			continue;
 582		}
 583		if (strncmp(p, "gartsize=", 9) == 0) {
 584			alpha_agpgart_size =
 585				get_mem_size_limit(p+9) << PAGE_SHIFT;
 586			continue;
 587		}
 588#ifdef CONFIG_VERBOSE_MCHECK
 589		if (strncmp(p, "verbose_mcheck=", 15) == 0) {
 590			alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
 591			continue;
 592		}
 593#endif
 594	}
 595
 596	/* Replace the command line, now that we've killed it with strsep.  */
 597	strcpy(command_line, boot_command_line);
 598
 599	/* If we want SRM console printk echoing early, do it now. */
 600	if (alpha_using_srm && srmcons_output) {
 601		register_srm_console();
 602
 603		/*
 604		 * If "console=srm" was specified, clear the srmcons_output
 605		 * flag now so that time.c won't unregister_srm_console
 606		 */
 607		if (srmcons_output & 2)
 608			srmcons_output = 0;
 609	}
 610
 611#ifdef CONFIG_MAGIC_SYSRQ
 612	/* If we're using SRM, make sysrq-b halt back to the prom,
 613	   not auto-reboot.  */
 614	if (alpha_using_srm) {
 615		struct sysrq_key_op *op = __sysrq_get_key_op('b');
 616		op->handler = (void *) machine_halt;
 617	}
 618#endif
 619
 620	/*
 621	 * Identify and reconfigure for the current system.
 622	 */
 623	cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
 624
 625	get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
 626		     cpu->type, &type_name, &var_name);
 627	if (*var_name == '0')
 628		var_name = "";
 629
 630	if (!vec) {
 631		vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
 632				 cpu->type);
 633	}
 634
 635	if (!vec) {
 636		panic("Unsupported system type: %s%s%s (%ld %ld)\n",
 637		      type_name, (*var_name ? " variation " : ""), var_name,
 638		      hwrpb->sys_type, hwrpb->sys_variation);
 639	}
 640	if (vec != &alpha_mv) {
 641		alpha_mv = *vec;
 642	}
 643	
 644	printk("Booting "
 645#ifdef CONFIG_ALPHA_GENERIC
 646	       "GENERIC "
 647#endif
 648	       "on %s%s%s using machine vector %s from %s\n",
 649	       type_name, (*var_name ? " variation " : ""),
 650	       var_name, alpha_mv.vector_name,
 651	       (alpha_using_srm ? "SRM" : "MILO"));
 652
 653	printk("Major Options: "
 654#ifdef CONFIG_SMP
 655	       "SMP "
 656#endif
 657#ifdef CONFIG_ALPHA_EV56
 658	       "EV56 "
 659#endif
 660#ifdef CONFIG_ALPHA_EV67
 661	       "EV67 "
 662#endif
 663#ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
 664	       "LEGACY_START "
 665#endif
 666#ifdef CONFIG_VERBOSE_MCHECK
 667	       "VERBOSE_MCHECK "
 668#endif
 669
 670#ifdef CONFIG_DISCONTIGMEM
 671	       "DISCONTIGMEM "
 672#ifdef CONFIG_NUMA
 673	       "NUMA "
 674#endif
 675#endif
 676
 677#ifdef CONFIG_DEBUG_SPINLOCK
 678	       "DEBUG_SPINLOCK "
 679#endif
 680#ifdef CONFIG_MAGIC_SYSRQ
 681	       "MAGIC_SYSRQ "
 682#endif
 683	       "\n");
 684
 685	printk("Command line: %s\n", command_line);
 686
 687	/* 
 688	 * Sync up the HAE.
 689	 * Save the SRM's current value for restoration.
 690	 */
 691	srm_hae = *alpha_mv.hae_register;
 692	__set_hae(alpha_mv.hae_cache);
 693
 694	/* Reset enable correctable error reports.  */
 695	wrmces(0x7);
 696
 697	/* Find our memory.  */
 698	setup_memory(kernel_end);
 699
 700	/* First guess at cpu cache sizes.  Do this before init_arch.  */
 701	determine_cpu_caches(cpu->type);
 702
 703	/* Initialize the machine.  Usually has to do with setting up
 704	   DMA windows and the like.  */
 705	if (alpha_mv.init_arch)
 706		alpha_mv.init_arch();
 707
 708	/* Reserve standard resources.  */
 709	reserve_std_resources();
 710
 711	/* 
 712	 * Give us a default console.  TGA users will see nothing until
 713	 * chr_dev_init is called, rather late in the boot sequence.
 714	 */
 715
 716#ifdef CONFIG_VT
 717#if defined(CONFIG_VGA_CONSOLE)
 718	conswitchp = &vga_con;
 719#elif defined(CONFIG_DUMMY_CONSOLE)
 720	conswitchp = &dummy_con;
 721#endif
 722#endif
 723
 724	/* Default root filesystem to sda2.  */
 725	ROOT_DEV = Root_SDA2;
 726
 727#ifdef CONFIG_EISA
 728	/* FIXME:  only set this when we actually have EISA in this box? */
 729	EISA_bus = 1;
 730#endif
 731
 732 	/*
 733	 * Check ASN in HWRPB for validity, report if bad.
 734	 * FIXME: how was this failing?  Should we trust it instead,
 735	 * and copy the value into alpha_mv.max_asn?
 736 	 */
 737
 738 	if (hwrpb->max_asn != MAX_ASN) {
 739		printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
 740 	}
 741
 742	/*
 743	 * Identify the flock of penguins.
 744	 */
 745
 746#ifdef CONFIG_SMP
 747	setup_smp();
 748#endif
 749	paging_init();
 750}
 751
 752static char sys_unknown[] = "Unknown";
 753static char systype_names[][16] = {
 754	"0",
 755	"ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
 756	"Pelican", "Morgan", "Sable", "Medulla", "Noname",
 757	"Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
 758	"Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
 759	"Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
 760	"Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
 761	"Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
 762};
 763
 764static char unofficial_names[][8] = {"100", "Ruffian"};
 765
 766static char api_names[][16] = {"200", "Nautilus"};
 767
 768static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
 769static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
 770
 771static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
 772static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
 773
 774static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
 775static int eb64p_indices[] = {0,0,1,2};
 776
 777static char eb66_names[][8] = {"EB66", "EB66+"};
 778static int eb66_indices[] = {0,0,1};
 779
 780static char marvel_names[][16] = {
 781	"Marvel/EV7"
 782};
 783static int marvel_indices[] = { 0 };
 784
 785static char rawhide_names[][16] = {
 786	"Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
 787};
 788static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
 789
 790static char titan_names[][16] = {
 791	"DEFAULT", "Privateer", "Falcon", "Granite"
 792};
 793static int titan_indices[] = {0,1,2,2,3};
 794
 795static char tsunami_names[][16] = {
 796	"0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
 797	"Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
 798	"Flying Clipper", "Shark"
 799};
 800static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
 801
 802static struct alpha_machine_vector * __init
 803get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 804{
 805	static struct alpha_machine_vector *systype_vecs[] __initdata =
 806	{
 807		NULL,		/* 0 */
 808		NULL,		/* ADU */
 809		NULL,		/* Cobra */
 810		NULL,		/* Ruby */
 811		NULL,		/* Flamingo */
 812		NULL,		/* Mannequin */
 813		&jensen_mv,
 814		NULL, 		/* Pelican */
 815		NULL,		/* Morgan */
 816		NULL,		/* Sable -- see below.  */
 817		NULL,		/* Medulla */
 818		&noname_mv,
 819		NULL,		/* Turbolaser */
 820		&avanti_mv,
 821		NULL,		/* Mustang */
 822		NULL,		/* Alcor, Bret, Maverick. HWRPB inaccurate? */
 823		NULL,		/* Tradewind */
 824		NULL,		/* Mikasa -- see below.  */
 825		NULL,		/* EB64 */
 826		NULL,		/* EB66 -- see variation.  */
 827		NULL,		/* EB64+ -- see variation.  */
 828		&alphabook1_mv,
 829		&rawhide_mv,
 830		NULL,		/* K2 */
 831		&lynx_mv,	/* Lynx */
 832		&xl_mv,
 833		NULL,		/* EB164 -- see variation.  */
 834		NULL,		/* Noritake -- see below.  */
 835		NULL,		/* Cortex */
 836		NULL,		/* 29 */
 837		&miata_mv,
 838		NULL,		/* XXM */
 839		&takara_mv,
 840		NULL,		/* Yukon */
 841		NULL,		/* Tsunami -- see variation.  */
 842		&wildfire_mv,	/* Wildfire */
 843		NULL,		/* CUSCO */
 844		&eiger_mv,	/* Eiger */
 845		NULL,		/* Titan */
 846		NULL,		/* Marvel */
 847	};
 848
 849	static struct alpha_machine_vector *unofficial_vecs[] __initdata =
 850	{
 851		NULL,		/* 100 */
 852		&ruffian_mv,
 853	};
 854
 855	static struct alpha_machine_vector *api_vecs[] __initdata =
 856	{
 857		NULL,		/* 200 */
 858		&nautilus_mv,
 859	};
 860
 861	static struct alpha_machine_vector *alcor_vecs[] __initdata = 
 862	{
 863		&alcor_mv, &xlt_mv, &xlt_mv
 864	};
 865
 866	static struct alpha_machine_vector *eb164_vecs[] __initdata =
 867	{
 868		&eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
 869	};
 870
 871	static struct alpha_machine_vector *eb64p_vecs[] __initdata =
 872	{
 873		&eb64p_mv,
 874		&cabriolet_mv,
 875		&cabriolet_mv		/* AlphaPCI64 */
 876	};
 877
 878	static struct alpha_machine_vector *eb66_vecs[] __initdata =
 879	{
 880		&eb66_mv,
 881		&eb66p_mv
 882	};
 883
 884	static struct alpha_machine_vector *marvel_vecs[] __initdata =
 885	{
 886		&marvel_ev7_mv,
 887	};
 888
 889	static struct alpha_machine_vector *titan_vecs[] __initdata =
 890	{
 891		&titan_mv,		/* default   */
 892		&privateer_mv,		/* privateer */
 893		&titan_mv,		/* falcon    */
 894		&privateer_mv,		/* granite   */
 895	};
 896
 897	static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
 898	{
 899		NULL,
 900		&dp264_mv,		/* dp264 */
 901		&dp264_mv,		/* warhol */
 902		&dp264_mv,		/* windjammer */
 903		&monet_mv,		/* monet */
 904		&clipper_mv,		/* clipper */
 905		&dp264_mv,		/* goldrush */
 906		&webbrick_mv,		/* webbrick */
 907		&dp264_mv,		/* catamaran */
 908		NULL,			/* brisbane? */
 909		NULL,			/* melbourne? */
 910		NULL,			/* flying clipper? */
 911		&shark_mv,		/* shark */
 912	};
 913
 914	/* ??? Do we need to distinguish between Rawhides?  */
 915
 916	struct alpha_machine_vector *vec;
 917
 918	/* Search the system tables first... */
 919	vec = NULL;
 920	if (type < ARRAY_SIZE(systype_vecs)) {
 921		vec = systype_vecs[type];
 922	} else if ((type > ST_API_BIAS) &&
 923		   (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
 924		vec = api_vecs[type - ST_API_BIAS];
 925	} else if ((type > ST_UNOFFICIAL_BIAS) &&
 926		   (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
 927		vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
 928	}
 929
 930	/* If we've not found one, try for a variation.  */
 931
 932	if (!vec) {
 933		/* Member ID is a bit-field. */
 934		unsigned long member = (variation >> 10) & 0x3f;
 935
 936		cpu &= 0xffffffff; /* make it usable */
 937
 938		switch (type) {
 939		case ST_DEC_ALCOR:
 940			if (member < ARRAY_SIZE(alcor_indices))
 941				vec = alcor_vecs[alcor_indices[member]];
 942			break;
 943		case ST_DEC_EB164:
 944			if (member < ARRAY_SIZE(eb164_indices))
 945				vec = eb164_vecs[eb164_indices[member]];
 946			/* PC164 may show as EB164 variation with EV56 CPU,
 947			   but, since no true EB164 had anything but EV5... */
 948			if (vec == &eb164_mv && cpu == EV56_CPU)
 949				vec = &pc164_mv;
 950			break;
 951		case ST_DEC_EB64P:
 952			if (member < ARRAY_SIZE(eb64p_indices))
 953				vec = eb64p_vecs[eb64p_indices[member]];
 954			break;
 955		case ST_DEC_EB66:
 956			if (member < ARRAY_SIZE(eb66_indices))
 957				vec = eb66_vecs[eb66_indices[member]];
 958			break;
 959		case ST_DEC_MARVEL:
 960			if (member < ARRAY_SIZE(marvel_indices))
 961				vec = marvel_vecs[marvel_indices[member]];
 962			break;
 963		case ST_DEC_TITAN:
 964			vec = titan_vecs[0];	/* default */
 965			if (member < ARRAY_SIZE(titan_indices))
 966				vec = titan_vecs[titan_indices[member]];
 967			break;
 968		case ST_DEC_TSUNAMI:
 969			if (member < ARRAY_SIZE(tsunami_indices))
 970				vec = tsunami_vecs[tsunami_indices[member]];
 971			break;
 972		case ST_DEC_1000:
 973			if (cpu == EV5_CPU || cpu == EV56_CPU)
 974				vec = &mikasa_primo_mv;
 975			else
 976				vec = &mikasa_mv;
 977			break;
 978		case ST_DEC_NORITAKE:
 979			if (cpu == EV5_CPU || cpu == EV56_CPU)
 980				vec = &noritake_primo_mv;
 981			else
 982				vec = &noritake_mv;
 983			break;
 984		case ST_DEC_2100_A500:
 985			if (cpu == EV5_CPU || cpu == EV56_CPU)
 986				vec = &sable_gamma_mv;
 987			else
 988				vec = &sable_mv;
 989			break;
 990		}
 991	}
 992	return vec;
 993}
 994
 995static struct alpha_machine_vector * __init
 996get_sysvec_byname(const char *name)
 997{
 998	static struct alpha_machine_vector *all_vecs[] __initdata =
 999	{
1000		&alcor_mv,
1001		&alphabook1_mv,
1002		&avanti_mv,
1003		&cabriolet_mv,
1004		&clipper_mv,
1005		&dp264_mv,
1006		&eb164_mv,
1007		&eb64p_mv,
1008		&eb66_mv,
1009		&eb66p_mv,
1010		&eiger_mv,
1011		&jensen_mv,
1012		&lx164_mv,
1013		&lynx_mv,
1014		&miata_mv,
1015		&mikasa_mv,
1016		&mikasa_primo_mv,
1017		&monet_mv,
1018		&nautilus_mv,
1019		&noname_mv,
1020		&noritake_mv,
1021		&noritake_primo_mv,
1022		&p2k_mv,
1023		&pc164_mv,
1024		&privateer_mv,
1025		&rawhide_mv,
1026		&ruffian_mv,
1027		&rx164_mv,
1028		&sable_mv,
1029		&sable_gamma_mv,
1030		&shark_mv,
1031		&sx164_mv,
1032		&takara_mv,
1033		&webbrick_mv,
1034		&wildfire_mv,
1035		&xl_mv,
1036		&xlt_mv
1037	};
1038
1039	size_t i;
1040
1041	for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
1042		struct alpha_machine_vector *mv = all_vecs[i];
1043		if (strcasecmp(mv->vector_name, name) == 0)
1044			return mv;
1045	}
1046	return NULL;
1047}
1048
1049static void
1050get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1051	     char **type_name, char **variation_name)
1052{
1053	unsigned long member;
1054
1055	/* If not in the tables, make it UNKNOWN,
1056	   else set type name to family */
1057	if (type < ARRAY_SIZE(systype_names)) {
1058		*type_name = systype_names[type];
1059	} else if ((type > ST_API_BIAS) &&
1060		   (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
1061		*type_name = api_names[type - ST_API_BIAS];
1062	} else if ((type > ST_UNOFFICIAL_BIAS) &&
1063		   (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1064		*type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1065	} else {
1066		*type_name = sys_unknown;
1067		*variation_name = sys_unknown;
1068		return;
1069	}
1070
1071	/* Set variation to "0"; if variation is zero, done.  */
1072	*variation_name = systype_names[0];
1073	if (variation == 0) {
1074		return;
1075	}
1076
1077	member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1078
1079	cpu &= 0xffffffff; /* make it usable */
1080
1081	switch (type) { /* select by family */
1082	default: /* default to variation "0" for now */
1083		break;
1084	case ST_DEC_EB164:
1085		if (member < ARRAY_SIZE(eb164_indices))
1086			*variation_name = eb164_names[eb164_indices[member]];
1087		/* PC164 may show as EB164 variation, but with EV56 CPU,
1088		   so, since no true EB164 had anything but EV5... */
1089		if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1090			*variation_name = eb164_names[1]; /* make it PC164 */
1091		break;
1092	case ST_DEC_ALCOR:
1093		if (member < ARRAY_SIZE(alcor_indices))
1094			*variation_name = alcor_names[alcor_indices[member]];
1095		break;
1096	case ST_DEC_EB64P:
1097		if (member < ARRAY_SIZE(eb64p_indices))
1098			*variation_name = eb64p_names[eb64p_indices[member]];
1099		break;
1100	case ST_DEC_EB66:
1101		if (member < ARRAY_SIZE(eb66_indices))
1102			*variation_name = eb66_names[eb66_indices[member]];
1103		break;
1104	case ST_DEC_MARVEL:
1105		if (member < ARRAY_SIZE(marvel_indices))
1106			*variation_name = marvel_names[marvel_indices[member]];
1107		break;
1108	case ST_DEC_RAWHIDE:
1109		if (member < ARRAY_SIZE(rawhide_indices))
1110			*variation_name = rawhide_names[rawhide_indices[member]];
1111		break;
1112	case ST_DEC_TITAN:
1113		*variation_name = titan_names[0];	/* default */
1114		if (member < ARRAY_SIZE(titan_indices))
1115			*variation_name = titan_names[titan_indices[member]];
1116		break;
1117	case ST_DEC_TSUNAMI:
1118		if (member < ARRAY_SIZE(tsunami_indices))
1119			*variation_name = tsunami_names[tsunami_indices[member]];
1120		break;
1121	}
1122}
1123
1124/*
1125 * A change was made to the HWRPB via an ECO and the following code
1126 * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1127 * was not implemented in the console firmware.  If it's revision 5 or
1128 * greater we can get the name of the platform as an ASCII string from
1129 * the HWRPB.  That's what this function does.  It checks the revision
1130 * level and if the string is in the HWRPB it returns the address of
1131 * the string--a pointer to the name of the platform.
1132 *
1133 * Returns:
1134 *      - Pointer to a ASCII string if it's in the HWRPB
1135 *      - Pointer to a blank string if the data is not in the HWRPB.
1136 */
1137
1138static char *
1139platform_string(void)
1140{
1141	struct dsr_struct *dsr;
1142	static char unk_system_string[] = "N/A";
1143
1144	/* Go to the console for the string pointer.
1145	 * If the rpb_vers is not 5 or greater the rpb
1146	 * is old and does not have this data in it.
1147	 */
1148	if (hwrpb->revision < 5)
1149		return (unk_system_string);
1150	else {
1151		/* The Dynamic System Recognition struct
1152		 * has the system platform name starting
1153		 * after the character count of the string.
1154		 */
1155		dsr =  ((struct dsr_struct *)
1156			((char *)hwrpb + hwrpb->dsr_offset));
1157		return ((char *)dsr + (dsr->sysname_off +
1158				       sizeof(long)));
1159	}
1160}
1161
1162static int
1163get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1164{
1165	struct percpu_struct *cpu;
1166	unsigned long i;
1167	int count = 0;
1168
1169	for (i = 0; i < num; i++) {
1170		cpu = (struct percpu_struct *)
1171			((char *)cpubase + i*hwrpb->processor_size);
1172		if ((cpu->flags & 0x1cc) == 0x1cc)
1173			count++;
1174	}
1175	return count;
1176}
1177
1178static void
1179show_cache_size (struct seq_file *f, const char *which, int shape)
1180{
1181	if (shape == -1)
1182		seq_printf (f, "%s\t\t: n/a\n", which);
1183	else if (shape == 0)
1184		seq_printf (f, "%s\t\t: unknown\n", which);
1185	else
1186		seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1187			    which, shape >> 10, shape & 15,
1188			    1 << ((shape >> 4) & 15));
1189}
1190
1191static int
1192show_cpuinfo(struct seq_file *f, void *slot)
1193{
1194	extern struct unaligned_stat {
1195		unsigned long count, va, pc;
1196	} unaligned[2];
1197
1198	static char cpu_names[][8] = {
1199		"EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1200		"EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1201		"EV68CX", "EV7", "EV79", "EV69"
1202	};
1203
1204	struct percpu_struct *cpu = slot;
1205	unsigned int cpu_index;
1206	char *cpu_name;
1207	char *systype_name;
1208	char *sysvariation_name;
1209	int nr_processors;
1210
1211	cpu_index = (unsigned) (cpu->type - 1);
1212	cpu_name = "Unknown";
1213	if (cpu_index < ARRAY_SIZE(cpu_names))
1214		cpu_name = cpu_names[cpu_index];
1215
1216	get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1217		     cpu->type, &systype_name, &sysvariation_name);
1218
1219	nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1220
1221	seq_printf(f, "cpu\t\t\t: Alpha\n"
1222		      "cpu model\t\t: %s\n"
1223		      "cpu variation\t\t: %ld\n"
1224		      "cpu revision\t\t: %ld\n"
1225		      "cpu serial number\t: %s\n"
1226		      "system type\t\t: %s\n"
1227		      "system variation\t: %s\n"
1228		      "system revision\t\t: %ld\n"
1229		      "system serial number\t: %s\n"
1230		      "cycle frequency [Hz]\t: %lu %s\n"
1231		      "timer frequency [Hz]\t: %lu.%02lu\n"
1232		      "page size [bytes]\t: %ld\n"
1233		      "phys. address bits\t: %ld\n"
1234		      "max. addr. space #\t: %ld\n"
1235		      "BogoMIPS\t\t: %lu.%02lu\n"
1236		      "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1237		      "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1238		      "platform string\t\t: %s\n"
1239		      "cpus detected\t\t: %d\n",
1240		       cpu_name, cpu->variation, cpu->revision,
1241		       (char*)cpu->serial_no,
1242		       systype_name, sysvariation_name, hwrpb->sys_revision,
1243		       (char*)hwrpb->ssn,
1244		       est_cycle_freq ? : hwrpb->cycle_freq,
1245		       est_cycle_freq ? "est." : "",
1246		       hwrpb->intr_freq / 4096,
1247		       (100 * hwrpb->intr_freq / 4096) % 100,
1248		       hwrpb->pagesize,
1249		       hwrpb->pa_bits,
1250		       hwrpb->max_asn,
1251		       loops_per_jiffy / (500000/HZ),
1252		       (loops_per_jiffy / (5000/HZ)) % 100,
1253		       unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1254		       unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1255		       platform_string(), nr_processors);
1256
1257#ifdef CONFIG_SMP
1258	seq_printf(f, "cpus active\t\t: %u\n"
1259		      "cpu active mask\t\t: %016lx\n",
1260		       num_online_cpus(), cpus_addr(cpu_possible_map)[0]);
1261#endif
1262
1263	show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1264	show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1265	show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1266	show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1267
1268	return 0;
1269}
1270
1271static int __init
1272read_mem_block(int *addr, int stride, int size)
1273{
1274	long nloads = size / stride, cnt, tmp;
1275
1276	__asm__ __volatile__(
1277	"	rpcc    %0\n"
1278	"1:	ldl	%3,0(%2)\n"
1279	"	subq	%1,1,%1\n"
1280	/* Next two XORs introduce an explicit data dependency between
1281	   consecutive loads in the loop, which will give us true load
1282	   latency. */
1283	"	xor	%3,%2,%2\n"
1284	"	xor	%3,%2,%2\n"
1285	"	addq	%2,%4,%2\n"
1286	"	bne	%1,1b\n"
1287	"	rpcc	%3\n"
1288	"	subl	%3,%0,%0\n"
1289	: "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1290	: "r" (stride), "1" (nloads), "2" (addr));
1291
1292	return cnt / (size / stride);
1293}
1294
1295#define CSHAPE(totalsize, linesize, assoc) \
1296  ((totalsize & ~0xff) | (linesize << 4) | assoc)
1297
1298/* ??? EV5 supports up to 64M, but did the systems with more than
1299   16M of BCACHE ever exist? */
1300#define MAX_BCACHE_SIZE	16*1024*1024
1301
1302/* Note that the offchip caches are direct mapped on all Alphas. */
1303static int __init
1304external_cache_probe(int minsize, int width)
1305{
1306	int cycles, prev_cycles = 1000000;
1307	int stride = 1 << width;
1308	long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1309
1310	if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1311		maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1312
1313	/* Get the first block cached. */
1314	read_mem_block(__va(0), stride, size);
1315
1316	while (size < maxsize) {
1317		/* Get an average load latency in cycles. */
1318		cycles = read_mem_block(__va(0), stride, size);
1319		if (cycles > prev_cycles * 2) {
1320			/* Fine, we exceed the cache. */
1321			printk("%ldK Bcache detected; load hit latency %d "
1322			       "cycles, load miss latency %d cycles\n",
1323			       size >> 11, prev_cycles, cycles);
1324			return CSHAPE(size >> 1, width, 1);
1325		}
1326		/* Try to get the next block cached. */
1327		read_mem_block(__va(size), stride, size);
1328		prev_cycles = cycles;
1329		size <<= 1;
1330	}
1331	return -1;	/* No BCACHE found. */
1332}
1333
1334static void __init
1335determine_cpu_caches (unsigned int cpu_type)
1336{
1337	int L1I, L1D, L2, L3;
1338
1339	switch (cpu_type) {
1340	case EV4_CPU:
1341	case EV45_CPU:
1342	  {
1343		if (cpu_type == EV4_CPU)
1344			L1I = CSHAPE(8*1024, 5, 1);
1345		else
1346			L1I = CSHAPE(16*1024, 5, 1);
1347		L1D = L1I;
1348		L3 = -1;
1349	
1350		/* BIU_CTL is a write-only Abox register.  PALcode has a
1351		   shadow copy, and may be available from some versions
1352		   of the CSERVE PALcall.  If we can get it, then
1353
1354			unsigned long biu_ctl, size;
1355			size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1356			L2 = CSHAPE (size, 5, 1);
1357
1358		   Unfortunately, we can't rely on that.
1359		*/
1360		L2 = external_cache_probe(128*1024, 5);
1361		break;
1362	  }
1363
1364	case LCA4_CPU:
1365	  {
1366		unsigned long car, size;
1367
1368		L1I = L1D = CSHAPE(8*1024, 5, 1);
1369		L3 = -1;
1370
1371		car = *(vuip) phys_to_virt (0x120000078UL);
1372		size = 64*1024 * (1 << ((car >> 5) & 7));
1373		/* No typo -- 8 byte cacheline size.  Whodathunk.  */
1374		L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1375		break;
1376	  }
1377
1378	case EV5_CPU:
1379	case EV56_CPU:
1380	  {
1381		unsigned long sc_ctl, width;
1382
1383		L1I = L1D = CSHAPE(8*1024, 5, 1);
1384
1385		/* Check the line size of the Scache.  */
1386		sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1387		width = sc_ctl & 0x1000 ? 6 : 5;
1388		L2 = CSHAPE (96*1024, width, 3);
1389
1390		/* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1391		   has a shadow copy, and may be available from some versions
1392		   of the CSERVE PALcall.  If we can get it, then
1393
1394			unsigned long bc_control, bc_config, size;
1395			size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1396			L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1397
1398		   Unfortunately, we can't rely on that.
1399		*/
1400		L3 = external_cache_probe(1024*1024, width);
1401		break;
1402	  }
1403
1404	case PCA56_CPU:
1405	case PCA57_CPU:
1406	  {
1407		unsigned long cbox_config, size;
1408
1409		if (cpu_type == PCA56_CPU) {
1410			L1I = CSHAPE(16*1024, 6, 1);
1411			L1D = CSHAPE(8*1024, 5, 1);
1412		} else {
1413			L1I = CSHAPE(32*1024, 6, 2);
1414			L1D = CSHAPE(16*1024, 5, 1);
1415		}
1416		L3 = -1;
1417
1418		cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1419		size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1420
1421#if 0
1422		L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1423#else
1424		L2 = external_cache_probe(512*1024, 6);
1425#endif
1426		break;
1427	  }
1428
1429	case EV6_CPU:
1430	case EV67_CPU:
1431	case EV68CB_CPU:
1432	case EV68AL_CPU:
1433	case EV68CX_CPU:
1434	case EV69_CPU:
1435		L1I = L1D = CSHAPE(64*1024, 6, 2);
1436		L2 = external_cache_probe(1024*1024, 6);
1437		L3 = -1;
1438		break;
1439
1440	case EV7_CPU:
1441	case EV79_CPU:
1442		L1I = L1D = CSHAPE(64*1024, 6, 2);
1443		L2 = CSHAPE(7*1024*1024/4, 6, 7);
1444		L3 = -1;
1445		break;
1446
1447	default:
1448		/* Nothing known about this cpu type.  */
1449		L1I = L1D = L2 = L3 = 0;
1450		break;
1451	}
1452
1453	alpha_l1i_cacheshape = L1I;
1454	alpha_l1d_cacheshape = L1D;
1455	alpha_l2_cacheshape = L2;
1456	alpha_l3_cacheshape = L3;
1457}
1458
1459/*
1460 * We show only CPU #0 info.
1461 */
1462static void *
1463c_start(struct seq_file *f, loff_t *pos)
1464{
1465	return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1466}
1467
1468static void *
1469c_next(struct seq_file *f, void *v, loff_t *pos)
1470{
1471	return NULL;
1472}
1473
1474static void
1475c_stop(struct seq_file *f, void *v)
1476{
1477}
1478
1479const struct seq_operations cpuinfo_op = {
1480	.start	= c_start,
1481	.next	= c_next,
1482	.stop	= c_stop,
1483	.show	= show_cpuinfo,
1484};
1485
1486
1487static int
1488alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1489{
1490#if 1
1491	/* FIXME FIXME FIXME */
1492	/* If we are using SRM and serial console, just hard halt here. */
1493	if (alpha_using_srm && srmcons_output)
1494		__halt();
1495#endif
1496        return NOTIFY_DONE;
1497}
1498
1499static __init int add_pcspkr(void)
1500{
1501	struct platform_device *pd;
1502	int ret;
1503
1504	pd = platform_device_alloc("pcspkr", -1);
1505	if (!pd)
1506		return -ENOMEM;
1507
1508	ret = platform_device_add(pd);
1509	if (ret)
1510		platform_device_put(pd);
1511
1512	return ret;
1513}
1514device_initcall(add_pcspkr);