arch/ia64/sn/kernel/setup.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1999,2001-2004 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/config.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/delay.h>
  13 #include <linux/kernel.h>
  14 #include <linux/kdev_t.h>
  15 #include <linux/string.h>
  16 #include <linux/tty.h>
  17 #include <linux/console.h>
  18 #include <linux/timex.h>
  19 #include <linux/sched.h>
  20 #include <linux/ioport.h>
  21 #include <linux/mm.h>
  22 #include <linux/serial.h>
  23 #include <linux/irq.h>
  24 #include <linux/bootmem.h>
  25 #include <linux/mmzone.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/acpi.h>
  28 #include <linux/compiler.h>
  29 #include <linux/sched.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/nodemask.h>
  32
  33 #include <asm/io.h>
  34 #include <asm/sal.h>
  35 #include <asm/machvec.h>
  36 #include <asm/system.h>
  37 #include <asm/processor.h>
  38 #include <asm/sn/arch.h>
  39 #include <asm/sn/addrs.h>
  40 #include <asm/sn/pda.h>
  41 #include <asm/sn/nodepda.h>
  42 #include <asm/sn/sn_cpuid.h>
  43 #include <asm/sn/simulator.h>
  44 #include <asm/sn/leds.h>
  45 #include <asm/sn/bte.h>
  46 #include <asm/sn/shub_mmr.h>
  47 #include <asm/sn/clksupport.h>
  48 #include <asm/sn/sn_sal.h>
  49 #include <asm/sn/geo.h>
  50 #include "xtalk/xwidgetdev.h"
  51 #include "xtalk/hubdev.h"
  52 #include <asm/sn/klconfig.h>
  53
  54
  55 DEFINE_PER_CPU(struct pda_s, pda_percpu);
  56
  57 #define MAX_PHYS_MEMORY         (1UL << 49)     /* 1 TB */
  58
  59 lboard_t *root_lboard[MAX_COMPACT_NODES];
  60
  61 extern void bte_init_node(nodepda_t *, cnodeid_t);
  62
  63 extern void sn_timer_init(void);
  64 extern unsigned long last_time_offset;
  65 extern void (*ia64_mark_idle) (int);
  66 extern void snidle(int);
  67 extern unsigned char acpi_kbd_controller_present;
  68
  69 unsigned long sn_rtc_cycles_per_second;
  70 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
  71
  72 DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
  73 EXPORT_PER_CPU_SYMBOL(__sn_hub_info);
  74
  75 partid_t sn_partid = -1;
  76 EXPORT_SYMBOL(sn_partid);
  77 char sn_system_serial_number_string[128];
  78 EXPORT_SYMBOL(sn_system_serial_number_string);
  79 u64 sn_partition_serial_number;
  80 EXPORT_SYMBOL(sn_partition_serial_number);
  81 u8 sn_partition_id;
  82 EXPORT_SYMBOL(sn_partition_id);
  83 u8 sn_system_size;
  84 EXPORT_SYMBOL(sn_system_size);
  85 u8 sn_sharing_domain_size;
  86 EXPORT_SYMBOL(sn_sharing_domain_size);
  87 u8 sn_coherency_id;
  88 EXPORT_SYMBOL(sn_coherency_id);
  89 u8 sn_region_size;
  90 EXPORT_SYMBOL(sn_region_size);
  91
  92 short physical_node_map[MAX_PHYSNODE_ID];
  93
  94 EXPORT_SYMBOL(physical_node_map);
  95
  96 int numionodes;
  97
  98 static void sn_init_pdas(char **);
  99 static void scan_for_ionodes(void);
 100
 101 static nodepda_t *nodepdaindr[MAX_COMPACT_NODES];
 102
 103 /*
 104  * The format of "screen_info" is strange, and due to early i386-setup
 105  * code. This is just enough to make the console code think we're on a
 106  * VGA color display.
 107  */
 108 struct screen_info sn_screen_info = {
 109         .orig_x = 0,
 110         .orig_y = 0,
 111         .orig_video_mode = 3,
 112         .orig_video_cols = 80,
 113         .orig_video_ega_bx = 3,
 114         .orig_video_lines = 25,
 115         .orig_video_isVGA = 1,
 116         .orig_video_points = 16
 117 };
 118
 119 /*
 120  * This is here so we can use the CMOS detection in ide-probe.c to
 121  * determine what drives are present.  In theory, we don't need this
 122  * as the auto-detection could be done via ide-probe.c:do_probe() but
 123  * in practice that would be much slower, which is painful when
 124  * running in the simulator.  Note that passing zeroes in DRIVE_INFO
 125  * is sufficient (the IDE driver will autodetect the drive geometry).
 126  */
 127 #ifdef CONFIG_IA64_GENERIC
 128 extern char drive_info[4 * 16];
 129 #else
 130 char drive_info[4 * 16];
 131 #endif
 132
 133 /*
 134  * Get nasid of current cpu early in boot before nodepda is initialized
 135  */
 136 static int
 137 boot_get_nasid(void)
 138 {
 139         int nasid;
 140
 141         if (ia64_sn_get_sapic_info(get_sapicid(), &nasid, NULL, NULL))
 142                 BUG();
 143         return nasid;
 144 }
 145
 146 /*
 147  * This routine can only be used during init, since
 148  * smp_boot_data is an init data structure.
 149  * We have to use smp_boot_data.cpu_phys_id to find
 150  * the physical id of the processor because the normal
 151  * cpu_physical_id() relies on data structures that
 152  * may not be initialized yet.
 153  */
 154
 155 static int __init pxm_to_nasid(int pxm)
 156 {
 157         int i;
 158         int nid;
 159
 160         nid = pxm_to_nid_map[pxm];
 161         for (i = 0; i < num_node_memblks; i++) {
 162                 if (node_memblk[i].nid == nid) {
 163                         return NASID_GET(node_memblk[i].start_paddr);
 164                 }
 165         }
 166         return -1;
 167 }
 168
 169 /**
 170  * early_sn_setup - early setup routine for SN platforms
 171  *
 172  * Sets up an initial console to aid debugging.  Intended primarily
 173  * for bringup.  See start_kernel() in init/main.c.
 174  */
 175
 176 void __init early_sn_setup(void)
 177 {
 178         efi_system_table_t *efi_systab;
 179         efi_config_table_t *config_tables;
 180         struct ia64_sal_systab *sal_systab;
 181         struct ia64_sal_desc_entry_point *ep;
 182         char *p;
 183         int i, j;
 184
 185         /*
 186          * Parse enough of the SAL tables to locate the SAL entry point. Since, console
 187          * IO on SN2 is done via SAL calls, early_printk won't work without this.
 188          *
 189          * This code duplicates some of the ACPI table parsing that is in efi.c & sal.c.
 190          * Any changes to those file may have to be made hereas well.
 191          */
 192         efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab);
 193         config_tables = __va(efi_systab->tables);
 194         for (i = 0; i < efi_systab->nr_tables; i++) {
 195                 if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) ==
 196                     0) {
 197                         sal_systab = __va(config_tables[i].table);
 198                         p = (char *)(sal_systab + 1);
 199                         for (j = 0; j < sal_systab->entry_count; j++) {
 200                                 if (*p == SAL_DESC_ENTRY_POINT) {
 201                                         ep = (struct ia64_sal_desc_entry_point
 202                                               *)p;
 203                                         ia64_sal_handler_init(__va
 204                                                               (ep->sal_proc),
 205                                                               __va(ep->gp));
 206                                         return;
 207                                 }
 208                                 p += SAL_DESC_SIZE(*p);
 209                         }
 210                 }
 211         }
 212         /* Uh-oh, SAL not available?? */
 213         printk(KERN_ERR "failed to find SAL entry point\n");
 214 }
 215
 216 extern int platform_intr_list[];
 217 extern nasid_t master_nasid;
 218 static int shub_1_1_found __initdata;
 219
 220 /*
 221  * sn_check_for_wars
 222  *
 223  * Set flag for enabling shub specific wars
 224  */
 225
 226 static inline int __init is_shub_1_1(int nasid)
 227 {
 228         unsigned long id;
 229         int rev;
 230
 231         if (is_shub2())
 232                 return 0;
 233         id = REMOTE_HUB_L(nasid, SH1_SHUB_ID);
 234         rev = (id & SH1_SHUB_ID_REVISION_MASK) >> SH1_SHUB_ID_REVISION_SHFT;
 235         return rev <= 2;
 236 }
 237
 238 static void __init sn_check_for_wars(void)
 239 {
 240         int cnode;
 241
 242         if (is_shub2()) {
 243                 /* none yet */
 244         } else {
 245                 for_each_online_node(cnode) {
 246                         if (is_shub_1_1(cnodeid_to_nasid(cnode)))
 247                                 sn_hub_info->shub_1_1_found = 1;
 248                 }
 249         }
 250 }
 251
 252 /**
 253  * sn_setup - SN platform setup routine
 254  * @cmdline_p: kernel command line
 255  *
 256  * Handles platform setup for SN machines.  This includes determining
 257  * the RTC frequency (via a SAL call), initializing secondary CPUs, and
 258  * setting up per-node data areas.  The console is also initialized here.
 259  */
 260 void __init sn_setup(char **cmdline_p)
 261 {
 262         long status, ticks_per_sec, drift;
 263         int pxm;
 264         int major = sn_sal_rev_major(), minor = sn_sal_rev_minor();
 265         extern void sn_cpu_init(void);
 266
 267         /*
 268          * If the generic code has enabled vga console support - lets
 269          * get rid of it again. This is a kludge for the fact that ACPI
 270          * currtently has no way of informing us if legacy VGA is available
 271          * or not.
 272          */
 273 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
 274         if (conswitchp == &vga_con) {
 275                 printk(KERN_DEBUG "SGI: Disabling VGA console\n");
 276 #ifdef CONFIG_DUMMY_CONSOLE
 277                 conswitchp = &dummy_con;
 278 #else
 279                 conswitchp = NULL;
 280 #endif                          /* CONFIG_DUMMY_CONSOLE */
 281         }
 282 #endif                          /* def(CONFIG_VT) && def(CONFIG_VGA_CONSOLE) */
 283
 284         MAX_DMA_ADDRESS = PAGE_OFFSET + MAX_PHYS_MEMORY;
 285
 286         memset(physical_node_map, -1, sizeof(physical_node_map));
 287         for (pxm = 0; pxm < MAX_PXM_DOMAINS; pxm++)
 288                 if (pxm_to_nid_map[pxm] != -1)
 289                         physical_node_map[pxm_to_nasid(pxm)] =
 290                             pxm_to_nid_map[pxm];
 291
 292         /*
 293          * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
 294          * support here so we don't have to listen to failed keyboard probe
 295          * messages.
 296          */
 297         if ((major < 2 || (major == 2 && minor <= 9)) &&
 298             acpi_kbd_controller_present) {
 299                 printk(KERN_INFO "Disabling legacy keyboard support as prom "
 300                        "is too old and doesn't provide FADT\n");
 301                 acpi_kbd_controller_present = 0;
 302         }
 303
 304         printk("SGI SAL version %x.%02x\n", major, minor);
 305
 306         /*
 307          * Confirm the SAL we're running on is recent enough...
 308          */
 309         if ((major < SN_SAL_MIN_MAJOR) || (major == SN_SAL_MIN_MAJOR &&
 310                                            minor < SN_SAL_MIN_MINOR)) {
 311                 printk(KERN_ERR "This kernel needs SGI SAL version >= "
 312                        "%x.%02x\n", SN_SAL_MIN_MAJOR, SN_SAL_MIN_MINOR);
 313                 panic("PROM version too old\n");
 314         }
 315
 316         master_nasid = boot_get_nasid();
 317
 318         status =
 319             ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
 320                                &drift);
 321         if (status != 0 || ticks_per_sec < 100000) {
 322                 printk(KERN_WARNING
 323                        "unable to determine platform RTC clock frequency, guessing.\n");
 324                 /* PROM gives wrong value for clock freq. so guess */
 325                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
 326         } else
 327                 sn_rtc_cycles_per_second = ticks_per_sec;
 328
 329         platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR;
 330
 331         /*
 332          * we set the default root device to /dev/hda
 333          * to make simulation easy
 334          */
 335         ROOT_DEV = Root_HDA1;
 336
 337         /*
 338          * Create the PDAs and NODEPDAs for all the cpus.
 339          */
 340         sn_init_pdas(cmdline_p);
 341
 342         ia64_mark_idle = &snidle;
 343
 344         /*
 345          * For the bootcpu, we do this here. All other cpus will make the
 346          * call as part of cpu_init in slave cpu initialization.
 347          */
 348         sn_cpu_init();
 349
 350 #ifdef CONFIG_SMP
 351         init_smp_config();
 352 #endif
 353         screen_info = sn_screen_info;
 354
 355         sn_timer_init();
 356 }
 357
 358 /**
 359  * sn_init_pdas - setup node data areas
 360  *
 361  * One time setup for Node Data Area.  Called by sn_setup().
 362  */
 363 static void __init sn_init_pdas(char **cmdline_p)
 364 {
 365         cnodeid_t cnode;
 366
 367         memset(pda->cnodeid_to_nasid_table, -1,
 368                sizeof(pda->cnodeid_to_nasid_table));
 369         for_each_online_node(cnode)
 370                 pda->cnodeid_to_nasid_table[cnode] =
 371                     pxm_to_nasid(nid_to_pxm_map[cnode]);
 372
 373         numionodes = num_online_nodes();
 374         scan_for_ionodes();
 375
 376         /*
 377          * Allocate & initalize the nodepda for each node.
 378          */
 379         for_each_online_node(cnode) {
 380                 nodepdaindr[cnode] =
 381                     alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t));
 382                 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
 383                 memset(nodepdaindr[cnode]->phys_cpuid, -1,
 384                     sizeof(nodepdaindr[cnode]->phys_cpuid));
 385         }
 386
 387         /*
 388          * Allocate & initialize nodepda for TIOs.  For now, put them on node 0.
 389          */
 390         for (cnode = num_online_nodes(); cnode < numionodes; cnode++) {
 391                 nodepdaindr[cnode] =
 392                     alloc_bootmem_node(NODE_DATA(0), sizeof(nodepda_t));
 393                 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
 394         }
 395
 396         /*
 397          * Now copy the array of nodepda pointers to each nodepda.
 398          */
 399         for (cnode = 0; cnode < numionodes; cnode++)
 400                 memcpy(nodepdaindr[cnode]->pernode_pdaindr, nodepdaindr,
 401                        sizeof(nodepdaindr));
 402
 403         /*
 404          * Set up IO related platform-dependent nodepda fields.
 405          * The following routine actually sets up the hubinfo struct
 406          * in nodepda.
 407          */
 408         for_each_online_node(cnode) {
 409                 bte_init_node(nodepdaindr[cnode], cnode);
 410         }
 411
 412         /*
 413          * Initialize the per node hubdev.  This includes IO Nodes and
 414          * headless/memless nodes.
 415          */
 416         for (cnode = 0; cnode < numionodes; cnode++) {
 417                 hubdev_init_node(nodepdaindr[cnode], cnode);
 418         }
 419 }
 420
 421 /**
 422  * sn_cpu_init - initialize per-cpu data areas
 423  * @cpuid: cpuid of the caller
 424  *
 425  * Called during cpu initialization on each cpu as it starts.
 426  * Currently, initializes the per-cpu data area for SNIA.
 427  * Also sets up a few fields in the nodepda.  Also known as
 428  * platform_cpu_init() by the ia64 machvec code.
 429  */
 430 void __init sn_cpu_init(void)
 431 {
 432         int cpuid;
 433         int cpuphyid;
 434         int nasid;
 435         int subnode;
 436         int slice;
 437         int cnode;
 438         int i;
 439         static int wars_have_been_checked;
 440
 441         memset(pda, 0, sizeof(pda));
 442         if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift,
 443                                 &sn_system_size, &sn_sharing_domain_size, &sn_partition_id,
 444                                 &sn_coherency_id, &sn_region_size))
 445                 BUG();
 446         sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
 447
 448         /*
 449          * The boot cpu makes this call again after platform initialization is
 450          * complete.
 451          */
 452         if (nodepdaindr[0] == NULL)
 453                 return;
 454
 455         cpuid = smp_processor_id();
 456         cpuphyid = get_sapicid();
 457
 458         if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
 459                 BUG();
 460
 461         for (i=0; i < MAX_NUMNODES; i++) {
 462                 if (nodepdaindr[i]) {
 463                         nodepdaindr[i]->phys_cpuid[cpuid].nasid = nasid;
 464                         nodepdaindr[i]->phys_cpuid[cpuid].slice = slice;
 465                         nodepdaindr[i]->phys_cpuid[cpuid].subnode = subnode;
 466                 }
 467         }
 468
 469         cnode = nasid_to_cnodeid(nasid);
 470
 471         pda->p_nodepda = nodepdaindr[cnode];
 472         pda->led_address =
 473             (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT));
 474         pda->led_state = LED_ALWAYS_SET;
 475         pda->hb_count = HZ / 2;
 476         pda->hb_state = 0;
 477         pda->idle_flag = 0;
 478
 479         if (cpuid != 0) {
 480                 memcpy(pda->cnodeid_to_nasid_table,
 481                        pdacpu(0)->cnodeid_to_nasid_table,
 482                        sizeof(pda->cnodeid_to_nasid_table));
 483         }
 484
 485         /*
 486          * Check for WARs.
 487          * Only needs to be done once, on BSP.
 488          * Has to be done after loop above, because it uses pda.cnodeid_to_nasid_table[i].
 489          * Has to be done before assignment below.
 490          */
 491         if (!wars_have_been_checked) {
 492                 sn_check_for_wars();
 493                 wars_have_been_checked = 1;
 494         }
 495         sn_hub_info->shub_1_1_found = shub_1_1_found;
 496
 497         /*
 498          * Set up addresses of PIO/MEM write status registers.
 499          */
 500         {
 501                 u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0};
 502                 u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_1,
 503                         SH2_PIO_WRITE_STATUS_2, SH2_PIO_WRITE_STATUS_3};
 504                 u64 *pio;
 505                 pio = is_shub1() ? pio1 : pio2;
 506                 pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]);
 507                 pda->pio_write_status_val = is_shub1() ? SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK : 0;
 508         }
 509
 510         /*
 511          * WAR addresses for SHUB 1.x.
 512          */
 513         if (local_node_data->active_cpu_count++ == 0 && is_shub1()) {
 514                 int buddy_nasid;
 515                 buddy_nasid =
 516                     cnodeid_to_nasid(numa_node_id() ==
 517                                      num_online_nodes() - 1 ? 0 : numa_node_id() + 1);
 518                 pda->pio_shub_war_cam_addr =
 519                     (volatile unsigned long *)GLOBAL_MMR_ADDR(nasid,
 520                                                               SH1_PI_CAM_CONTROL);
 521         }
 522 }
 523
 524 /*
 525  * Scan klconfig for ionodes.  Add the nasids to the
 526  * physical_node_map and the pda and increment numionodes.
 527  */
 528
 529 static void __init scan_for_ionodes(void)
 530 {
 531         int nasid = 0;
 532         lboard_t *brd;
 533
 534         /* Setup ionodes with memory */
 535         for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
 536                 char *klgraph_header;
 537                 cnodeid_t cnodeid;
 538
 539                 if (physical_node_map[nasid] == -1)
 540                         continue;
 541
 542                 cnodeid = -1;
 543                 klgraph_header = __va(ia64_sn_get_klconfig_addr(nasid));
 544                 if (!klgraph_header) {
 545                         if (IS_RUNNING_ON_SIMULATOR())
 546                                 continue;
 547                         BUG();  /* All nodes must have klconfig tables! */
 548                 }
 549                 cnodeid = nasid_to_cnodeid(nasid);
 550                 root_lboard[cnodeid] = (lboard_t *)
 551                     NODE_OFFSET_TO_LBOARD((nasid),
 552                                           ((kl_config_hdr_t
 553                                             *) (klgraph_header))->
 554                                           ch_board_info);
 555         }
 556
 557         /* Scan headless/memless IO Nodes. */
 558         for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
 559                 /* if there's no nasid, don't try to read the klconfig on the node */
 560                 if (physical_node_map[nasid] == -1)
 561                         continue;
 562                 brd = find_lboard_any((lboard_t *)
 563                                       root_lboard[nasid_to_cnodeid(nasid)],
 564                                       KLTYPE_SNIA);
 565                 if (brd) {
 566                         brd = KLCF_NEXT_ANY(brd);       /* Skip this node's lboard */
 567                         if (!brd)
 568                                 continue;
 569                 }
 570
 571                 brd = find_lboard_any(brd, KLTYPE_SNIA);
 572
 573                 while (brd) {
 574                         pda->cnodeid_to_nasid_table[numionodes] =
 575                             brd->brd_nasid;
 576                         physical_node_map[brd->brd_nasid] = numionodes;
 577                         root_lboard[numionodes] = brd;
 578                         numionodes++;
 579                         brd = KLCF_NEXT_ANY(brd);
 580                         if (!brd)
 581                                 break;
 582
 583                         brd = find_lboard_any(brd, KLTYPE_SNIA);
 584                 }
 585         }
 586
 587         /* Scan for TIO nodes. */
 588         for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
 589                 /* if there's no nasid, don't try to read the klconfig on the node */
 590                 if (physical_node_map[nasid] == -1)
 591                         continue;
 592                 brd = find_lboard_any((lboard_t *)
 593                                       root_lboard[nasid_to_cnodeid(nasid)],
 594                                       KLTYPE_TIO);
 595                 while (brd) {
 596                         pda->cnodeid_to_nasid_table[numionodes] =
 597                             brd->brd_nasid;
 598                         physical_node_map[brd->brd_nasid] = numionodes;
 599                         root_lboard[numionodes] = brd;
 600                         numionodes++;
 601                         brd = KLCF_NEXT_ANY(brd);
 602                         if (!brd)
 603                                 break;
 604
 605                         brd = find_lboard_any(brd, KLTYPE_TIO);
 606                 }
 607         }
 608
 609 }
 610
 611 int
 612 nasid_slice_to_cpuid(int nasid, int slice)
 613 {
 614         long cpu;
 615
 616         for (cpu=0; cpu < NR_CPUS; cpu++)
 617                 if (nodepda->phys_cpuid[cpu].nasid == nasid && nodepda->phys_cpuid[cpu].slice == slice)
 618                         return cpu;
 619
 620         return -1;
 621 }