linux/arch/powerpc/platforms/pseries/setup.c
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   1/*
   2 *  64-bit pSeries and RS/6000 setup code.
   3 *
   4 *  Copyright (C) 1995  Linus Torvalds
   5 *  Adapted from 'alpha' version by Gary Thomas
   6 *  Modified by Cort Dougan (cort@cs.nmt.edu)
   7 *  Modified by PPC64 Team, IBM Corp
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License
  11 * as published by the Free Software Foundation; either version
  12 * 2 of the License, or (at your option) any later version.
  13 */
  14
  15/*
  16 * bootup setup stuff..
  17 */
  18
  19#include <linux/cpu.h>
  20#include <linux/errno.h>
  21#include <linux/sched.h>
  22#include <linux/kernel.h>
  23#include <linux/mm.h>
  24#include <linux/stddef.h>
  25#include <linux/unistd.h>
  26#include <linux/user.h>
  27#include <linux/tty.h>
  28#include <linux/major.h>
  29#include <linux/interrupt.h>
  30#include <linux/reboot.h>
  31#include <linux/init.h>
  32#include <linux/ioport.h>
  33#include <linux/console.h>
  34#include <linux/pci.h>
  35#include <linux/utsname.h>
  36#include <linux/adb.h>
  37#include <linux/export.h>
  38#include <linux/delay.h>
  39#include <linux/irq.h>
  40#include <linux/seq_file.h>
  41#include <linux/root_dev.h>
  42#include <linux/cpuidle.h>
  43
  44#include <asm/mmu.h>
  45#include <asm/processor.h>
  46#include <asm/io.h>
  47#include <asm/pgtable.h>
  48#include <asm/prom.h>
  49#include <asm/rtas.h>
  50#include <asm/pci-bridge.h>
  51#include <asm/iommu.h>
  52#include <asm/dma.h>
  53#include <asm/machdep.h>
  54#include <asm/irq.h>
  55#include <asm/time.h>
  56#include <asm/nvram.h>
  57#include <asm/pmc.h>
  58#include <asm/mpic.h>
  59#include <asm/xics.h>
  60#include <asm/ppc-pci.h>
  61#include <asm/i8259.h>
  62#include <asm/udbg.h>
  63#include <asm/smp.h>
  64#include <asm/firmware.h>
  65#include <asm/eeh.h>
  66#include <asm/pSeries_reconfig.h>
  67
  68#include "plpar_wrappers.h"
  69#include "pseries.h"
  70
  71int CMO_PrPSP = -1;
  72int CMO_SecPSP = -1;
  73unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT);
  74EXPORT_SYMBOL(CMO_PageSize);
  75
  76int fwnmi_active;  /* TRUE if an FWNMI handler is present */
  77
  78static struct device_node *pSeries_mpic_node;
  79
  80static void pSeries_show_cpuinfo(struct seq_file *m)
  81{
  82        struct device_node *root;
  83        const char *model = "";
  84
  85        root = of_find_node_by_path("/");
  86        if (root)
  87                model = of_get_property(root, "model", NULL);
  88        seq_printf(m, "machine\t\t: CHRP %s\n", model);
  89        of_node_put(root);
  90}
  91
  92/* Initialize firmware assisted non-maskable interrupts if
  93 * the firmware supports this feature.
  94 */
  95static void __init fwnmi_init(void)
  96{
  97        unsigned long system_reset_addr, machine_check_addr;
  98
  99        int ibm_nmi_register = rtas_token("ibm,nmi-register");
 100        if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
 101                return;
 102
 103        /* If the kernel's not linked at zero we point the firmware at low
 104         * addresses anyway, and use a trampoline to get to the real code. */
 105        system_reset_addr  = __pa(system_reset_fwnmi) - PHYSICAL_START;
 106        machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
 107
 108        if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
 109                                machine_check_addr))
 110                fwnmi_active = 1;
 111}
 112
 113static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
 114{
 115        struct irq_chip *chip = irq_desc_get_chip(desc);
 116        unsigned int cascade_irq = i8259_irq();
 117
 118        if (cascade_irq != NO_IRQ)
 119                generic_handle_irq(cascade_irq);
 120
 121        chip->irq_eoi(&desc->irq_data);
 122}
 123
 124static void __init pseries_setup_i8259_cascade(void)
 125{
 126        struct device_node *np, *old, *found = NULL;
 127        unsigned int cascade;
 128        const u32 *addrp;
 129        unsigned long intack = 0;
 130        int naddr;
 131
 132        for_each_node_by_type(np, "interrupt-controller") {
 133                if (of_device_is_compatible(np, "chrp,iic")) {
 134                        found = np;
 135                        break;
 136                }
 137        }
 138
 139        if (found == NULL) {
 140                printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
 141                return;
 142        }
 143
 144        cascade = irq_of_parse_and_map(found, 0);
 145        if (cascade == NO_IRQ) {
 146                printk(KERN_ERR "pic: failed to map cascade interrupt");
 147                return;
 148        }
 149        pr_debug("pic: cascade mapped to irq %d\n", cascade);
 150
 151        for (old = of_node_get(found); old != NULL ; old = np) {
 152                np = of_get_parent(old);
 153                of_node_put(old);
 154                if (np == NULL)
 155                        break;
 156                if (strcmp(np->name, "pci") != 0)
 157                        continue;
 158                addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
 159                if (addrp == NULL)
 160                        continue;
 161                naddr = of_n_addr_cells(np);
 162                intack = addrp[naddr-1];
 163                if (naddr > 1)
 164                        intack |= ((unsigned long)addrp[naddr-2]) << 32;
 165        }
 166        if (intack)
 167                printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
 168        i8259_init(found, intack);
 169        of_node_put(found);
 170        irq_set_chained_handler(cascade, pseries_8259_cascade);
 171}
 172
 173static void __init pseries_mpic_init_IRQ(void)
 174{
 175        struct device_node *np;
 176        const unsigned int *opprop;
 177        unsigned long openpic_addr = 0;
 178        int naddr, n, i, opplen;
 179        struct mpic *mpic;
 180
 181        np = of_find_node_by_path("/");
 182        naddr = of_n_addr_cells(np);
 183        opprop = of_get_property(np, "platform-open-pic", &opplen);
 184        if (opprop != 0) {
 185                openpic_addr = of_read_number(opprop, naddr);
 186                printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 187        }
 188        of_node_put(np);
 189
 190        BUG_ON(openpic_addr == 0);
 191
 192        /* Setup the openpic driver */
 193        mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, 0,
 194                          16, 250, /* isu size, irq count */
 195                          " MPIC     ");
 196        BUG_ON(mpic == NULL);
 197
 198        /* Add ISUs */
 199        opplen /= sizeof(u32);
 200        for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
 201                unsigned long isuaddr = of_read_number(opprop + i, naddr);
 202                mpic_assign_isu(mpic, n, isuaddr);
 203        }
 204
 205        /* Setup top-level get_irq */
 206        ppc_md.get_irq = mpic_get_irq;
 207
 208        /* All ISUs are setup, complete initialization */
 209        mpic_init(mpic);
 210
 211        /* Look for cascade */
 212        pseries_setup_i8259_cascade();
 213}
 214
 215static void __init pseries_xics_init_IRQ(void)
 216{
 217        xics_init();
 218        pseries_setup_i8259_cascade();
 219}
 220
 221static void pseries_lpar_enable_pmcs(void)
 222{
 223        unsigned long set, reset;
 224
 225        set = 1UL << 63;
 226        reset = 0;
 227        plpar_hcall_norets(H_PERFMON, set, reset);
 228}
 229
 230static void __init pseries_discover_pic(void)
 231{
 232        struct device_node *np;
 233        const char *typep;
 234
 235        for (np = NULL; (np = of_find_node_by_name(np,
 236                                                   "interrupt-controller"));) {
 237                typep = of_get_property(np, "compatible", NULL);
 238                if (strstr(typep, "open-pic")) {
 239                        pSeries_mpic_node = of_node_get(np);
 240                        ppc_md.init_IRQ       = pseries_mpic_init_IRQ;
 241                        setup_kexec_cpu_down_mpic();
 242                        smp_init_pseries_mpic();
 243                        return;
 244                } else if (strstr(typep, "ppc-xicp")) {
 245                        ppc_md.init_IRQ       = pseries_xics_init_IRQ;
 246                        setup_kexec_cpu_down_xics();
 247                        smp_init_pseries_xics();
 248                        return;
 249                }
 250        }
 251        printk(KERN_ERR "pSeries_discover_pic: failed to recognize"
 252               " interrupt-controller\n");
 253}
 254
 255static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
 256{
 257        struct device_node *np = node;
 258        struct pci_dn *pci = NULL;
 259        int err = NOTIFY_OK;
 260
 261        switch (action) {
 262        case PSERIES_RECONFIG_ADD:
 263                pci = np->parent->data;
 264                if (pci)
 265                        update_dn_pci_info(np, pci->phb);
 266                break;
 267        default:
 268                err = NOTIFY_DONE;
 269                break;
 270        }
 271        return err;
 272}
 273
 274static struct notifier_block pci_dn_reconfig_nb = {
 275        .notifier_call = pci_dn_reconfig_notifier,
 276};
 277
 278struct kmem_cache *dtl_cache;
 279
 280#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 281/*
 282 * Allocate space for the dispatch trace log for all possible cpus
 283 * and register the buffers with the hypervisor.  This is used for
 284 * computing time stolen by the hypervisor.
 285 */
 286static int alloc_dispatch_logs(void)
 287{
 288        int cpu, ret;
 289        struct paca_struct *pp;
 290        struct dtl_entry *dtl;
 291
 292        if (!firmware_has_feature(FW_FEATURE_SPLPAR))
 293                return 0;
 294
 295        if (!dtl_cache)
 296                return 0;
 297
 298        for_each_possible_cpu(cpu) {
 299                pp = &paca[cpu];
 300                dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
 301                if (!dtl) {
 302                        pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
 303                                cpu);
 304                        pr_warn("Stolen time statistics will be unreliable\n");
 305                        break;
 306                }
 307
 308                pp->dtl_ridx = 0;
 309                pp->dispatch_log = dtl;
 310                pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
 311                pp->dtl_curr = dtl;
 312        }
 313
 314        /* Register the DTL for the current (boot) cpu */
 315        dtl = get_paca()->dispatch_log;
 316        get_paca()->dtl_ridx = 0;
 317        get_paca()->dtl_curr = dtl;
 318        get_paca()->lppaca_ptr->dtl_idx = 0;
 319
 320        /* hypervisor reads buffer length from this field */
 321        dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
 322        ret = register_dtl(hard_smp_processor_id(), __pa(dtl));
 323        if (ret)
 324                pr_err("WARNING: DTL registration of cpu %d (hw %d) failed "
 325                       "with %d\n", smp_processor_id(),
 326                       hard_smp_processor_id(), ret);
 327        get_paca()->lppaca_ptr->dtl_enable_mask = 2;
 328
 329        return 0;
 330}
 331#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
 332static inline int alloc_dispatch_logs(void)
 333{
 334        return 0;
 335}
 336#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
 337
 338static int alloc_dispatch_log_kmem_cache(void)
 339{
 340        dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
 341                                                DISPATCH_LOG_BYTES, 0, NULL);
 342        if (!dtl_cache) {
 343                pr_warn("Failed to create dispatch trace log buffer cache\n");
 344                pr_warn("Stolen time statistics will be unreliable\n");
 345                return 0;
 346        }
 347
 348        return alloc_dispatch_logs();
 349}
 350early_initcall(alloc_dispatch_log_kmem_cache);
 351
 352static void pSeries_idle(void)
 353{
 354        /* This would call on the cpuidle framework, and the back-end pseries
 355         * driver to  go to idle states
 356         */
 357        if (cpuidle_idle_call()) {
 358                /* On error, execute default handler
 359                 * to go into low thread priority and possibly
 360                 * low power mode.
 361                 */
 362                HMT_low();
 363                HMT_very_low();
 364        }
 365}
 366
 367static void __init pSeries_setup_arch(void)
 368{
 369        panic_timeout = 10;
 370
 371        /* Discover PIC type and setup ppc_md accordingly */
 372        pseries_discover_pic();
 373
 374        /* openpic global configuration register (64-bit format). */
 375        /* openpic Interrupt Source Unit pointer (64-bit format). */
 376        /* python0 facility area (mmio) (64-bit format) REAL address. */
 377
 378        /* init to some ~sane value until calibrate_delay() runs */
 379        loops_per_jiffy = 50000000;
 380
 381        fwnmi_init();
 382
 383        /* Find and initialize PCI host bridges */
 384        init_pci_config_tokens();
 385        find_and_init_phbs();
 386        pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb);
 387        eeh_init();
 388
 389        pSeries_nvram_init();
 390
 391        if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 392                vpa_init(boot_cpuid);
 393                ppc_md.power_save = pSeries_idle;
 394        }
 395
 396        if (firmware_has_feature(FW_FEATURE_LPAR))
 397                ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
 398        else
 399                ppc_md.enable_pmcs = power4_enable_pmcs;
 400}
 401
 402static int __init pSeries_init_panel(void)
 403{
 404        /* Manually leave the kernel version on the panel. */
 405        ppc_md.progress("Linux ppc64\n", 0);
 406        ppc_md.progress(init_utsname()->version, 0);
 407
 408        return 0;
 409}
 410machine_arch_initcall(pseries, pSeries_init_panel);
 411
 412static int pseries_set_dabr(unsigned long dabr)
 413{
 414        return plpar_hcall_norets(H_SET_DABR, dabr);
 415}
 416
 417static int pseries_set_xdabr(unsigned long dabr)
 418{
 419        /* We want to catch accesses from kernel and userspace */
 420        return plpar_hcall_norets(H_SET_XDABR, dabr,
 421                        H_DABRX_KERNEL | H_DABRX_USER);
 422}
 423
 424#define CMO_CHARACTERISTICS_TOKEN 44
 425#define CMO_MAXLENGTH 1026
 426
 427void pSeries_coalesce_init(void)
 428{
 429        struct hvcall_mpp_x_data mpp_x_data;
 430
 431        if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
 432                powerpc_firmware_features |= FW_FEATURE_XCMO;
 433        else
 434                powerpc_firmware_features &= ~FW_FEATURE_XCMO;
 435}
 436
 437/**
 438 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
 439 * handle that here. (Stolen from parse_system_parameter_string)
 440 */
 441void pSeries_cmo_feature_init(void)
 442{
 443        char *ptr, *key, *value, *end;
 444        int call_status;
 445        int page_order = IOMMU_PAGE_SHIFT;
 446
 447        pr_debug(" -> fw_cmo_feature_init()\n");
 448        spin_lock(&rtas_data_buf_lock);
 449        memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
 450        call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
 451                                NULL,
 452                                CMO_CHARACTERISTICS_TOKEN,
 453                                __pa(rtas_data_buf),
 454                                RTAS_DATA_BUF_SIZE);
 455
 456        if (call_status != 0) {
 457                spin_unlock(&rtas_data_buf_lock);
 458                pr_debug("CMO not available\n");
 459                pr_debug(" <- fw_cmo_feature_init()\n");
 460                return;
 461        }
 462
 463        end = rtas_data_buf + CMO_MAXLENGTH - 2;
 464        ptr = rtas_data_buf + 2;        /* step over strlen value */
 465        key = value = ptr;
 466
 467        while (*ptr && (ptr <= end)) {
 468                /* Separate the key and value by replacing '=' with '\0' and
 469                 * point the value at the string after the '='
 470                 */
 471                if (ptr[0] == '=') {
 472                        ptr[0] = '\0';
 473                        value = ptr + 1;
 474                } else if (ptr[0] == '\0' || ptr[0] == ',') {
 475                        /* Terminate the string containing the key/value pair */
 476                        ptr[0] = '\0';
 477
 478                        if (key == value) {
 479                                pr_debug("Malformed key/value pair\n");
 480                                /* Never found a '=', end processing */
 481                                break;
 482                        }
 483
 484                        if (0 == strcmp(key, "CMOPageSize"))
 485                                page_order = simple_strtol(value, NULL, 10);
 486                        else if (0 == strcmp(key, "PrPSP"))
 487                                CMO_PrPSP = simple_strtol(value, NULL, 10);
 488                        else if (0 == strcmp(key, "SecPSP"))
 489                                CMO_SecPSP = simple_strtol(value, NULL, 10);
 490                        value = key = ptr + 1;
 491                }
 492                ptr++;
 493        }
 494
 495        /* Page size is returned as the power of 2 of the page size,
 496         * convert to the page size in bytes before returning
 497         */
 498        CMO_PageSize = 1 << page_order;
 499        pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
 500
 501        if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
 502                pr_info("CMO enabled\n");
 503                pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
 504                         CMO_SecPSP);
 505                powerpc_firmware_features |= FW_FEATURE_CMO;
 506                pSeries_coalesce_init();
 507        } else
 508                pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
 509                         CMO_SecPSP);
 510        spin_unlock(&rtas_data_buf_lock);
 511        pr_debug(" <- fw_cmo_feature_init()\n");
 512}
 513
 514/*
 515 * Early initialization.  Relocation is on but do not reference unbolted pages
 516 */
 517static void __init pSeries_init_early(void)
 518{
 519        pr_debug(" -> pSeries_init_early()\n");
 520
 521#ifdef CONFIG_HVC_CONSOLE
 522        if (firmware_has_feature(FW_FEATURE_LPAR))
 523                hvc_vio_init_early();
 524#endif
 525        if (firmware_has_feature(FW_FEATURE_DABR))
 526                ppc_md.set_dabr = pseries_set_dabr;
 527        else if (firmware_has_feature(FW_FEATURE_XDABR))
 528                ppc_md.set_dabr = pseries_set_xdabr;
 529
 530        pSeries_cmo_feature_init();
 531        iommu_init_early_pSeries();
 532
 533        pr_debug(" <- pSeries_init_early()\n");
 534}
 535
 536/*
 537 * Called very early, MMU is off, device-tree isn't unflattened
 538 */
 539
 540static int __init pSeries_probe_hypertas(unsigned long node,
 541                                         const char *uname, int depth,
 542                                         void *data)
 543{
 544        const char *hypertas;
 545        unsigned long len;
 546
 547        if (depth != 1 ||
 548            (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0))
 549                return 0;
 550
 551        hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len);
 552        if (!hypertas)
 553                return 1;
 554
 555        powerpc_firmware_features |= FW_FEATURE_LPAR;
 556        fw_feature_init(hypertas, len);
 557
 558        return 1;
 559}
 560
 561static int __init pSeries_probe(void)
 562{
 563        unsigned long root = of_get_flat_dt_root();
 564        char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);
 565
 566        if (dtype == NULL)
 567                return 0;
 568        if (strcmp(dtype, "chrp"))
 569                return 0;
 570
 571        /* Cell blades firmware claims to be chrp while it's not. Until this
 572         * is fixed, we need to avoid those here.
 573         */
 574        if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
 575            of_flat_dt_is_compatible(root, "IBM,CBEA"))
 576                return 0;
 577
 578        pr_debug("pSeries detected, looking for LPAR capability...\n");
 579
 580        /* Now try to figure out if we are running on LPAR */
 581        of_scan_flat_dt(pSeries_probe_hypertas, NULL);
 582
 583        if (firmware_has_feature(FW_FEATURE_LPAR))
 584                hpte_init_lpar();
 585        else
 586                hpte_init_native();
 587
 588        pr_debug("Machine is%s LPAR !\n",
 589                 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
 590
 591        return 1;
 592}
 593
 594static int pSeries_pci_probe_mode(struct pci_bus *bus)
 595{
 596        if (firmware_has_feature(FW_FEATURE_LPAR))
 597                return PCI_PROBE_DEVTREE;
 598        return PCI_PROBE_NORMAL;
 599}
 600
 601/**
 602 * pSeries_power_off - tell firmware about how to power off the system.
 603 *
 604 * This function calls either the power-off rtas token in normal cases
 605 * or the ibm,power-off-ups token (if present & requested) in case of
 606 * a power failure. If power-off token is used, power on will only be
 607 * possible with power button press. If ibm,power-off-ups token is used
 608 * it will allow auto poweron after power is restored.
 609 */
 610static void pSeries_power_off(void)
 611{
 612        int rc;
 613        int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
 614
 615        if (rtas_flash_term_hook)
 616                rtas_flash_term_hook(SYS_POWER_OFF);
 617
 618        if (rtas_poweron_auto == 0 ||
 619                rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
 620                rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
 621                printk(KERN_INFO "RTAS power-off returned %d\n", rc);
 622        } else {
 623                rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
 624                printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
 625        }
 626        for (;;);
 627}
 628
 629#ifndef CONFIG_PCI
 630void pSeries_final_fixup(void) { }
 631#endif
 632
 633define_machine(pseries) {
 634        .name                   = "pSeries",
 635        .probe                  = pSeries_probe,
 636        .setup_arch             = pSeries_setup_arch,
 637        .init_early             = pSeries_init_early,
 638        .show_cpuinfo           = pSeries_show_cpuinfo,
 639        .log_error              = pSeries_log_error,
 640        .pcibios_fixup          = pSeries_final_fixup,
 641        .pci_probe_mode         = pSeries_pci_probe_mode,
 642        .restart                = rtas_restart,
 643        .power_off              = pSeries_power_off,
 644        .halt                   = rtas_halt,
 645        .panic                  = rtas_os_term,
 646        .get_boot_time          = rtas_get_boot_time,
 647        .get_rtc_time           = rtas_get_rtc_time,
 648        .set_rtc_time           = rtas_set_rtc_time,
 649        .calibrate_decr         = generic_calibrate_decr,
 650        .progress               = rtas_progress,
 651        .system_reset_exception = pSeries_system_reset_exception,
 652        .machine_check_exception = pSeries_machine_check_exception,
 653};
 654