arch/mips/include/asm/sn/sn0/hubio.h

   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  * Derived from IRIX <sys/SN/SN0/hubio.h>, Revision 1.80.
   7  *
   8  * Copyright (C) 1992 - 1997, 1999 Silicon Graphics, Inc.
   9  * Copyright (C) 1999 by Ralf Baechle
  10  */
  11 #ifndef _ASM_SGI_SN_SN0_HUBIO_H
  12 #define _ASM_SGI_SN_SN0_HUBIO_H
  13
  14 /*
  15  * Hub I/O interface registers
  16  *
  17  * All registers in this file are subject to change until Hub chip tapeout.
  18  * In general, the longer software name should be used when available.
  19  */
  20
  21 /*
  22  * Slightly friendlier names for some common registers.
  23  * The hardware definitions follow.
  24  */
  25 #define IIO_WIDGET              IIO_WID      /* Widget identification */
  26 #define IIO_WIDGET_STAT         IIO_WSTAT    /* Widget status register */
  27 #define IIO_WIDGET_CTRL         IIO_WCR      /* Widget control register */
  28 #define IIO_WIDGET_TOUT         IIO_WRTO     /* Widget request timeout */
  29 #define IIO_WIDGET_FLUSH        IIO_WTFR     /* Widget target flush */
  30 #define IIO_PROTECT             IIO_ILAPR    /* IO interface protection */
  31 #define IIO_PROTECT_OVRRD       IIO_ILAPO    /* IO protect override */
  32 #define IIO_OUTWIDGET_ACCESS    IIO_IOWA     /* Outbound widget access */
  33 #define IIO_INWIDGET_ACCESS     IIO_IIWA     /* Inbound widget access */
  34 #define IIO_INDEV_ERR_MASK      IIO_IIDEM    /* Inbound device error mask */
  35 #define IIO_LLP_CSR             IIO_ILCSR    /* LLP control and status */
  36 #define IIO_LLP_LOG             IIO_ILLR     /* LLP log */
  37 #define IIO_XTALKCC_TOUT        IIO_IXCC     /* Xtalk credit count timeout*/
  38 #define IIO_XTALKTT_TOUT        IIO_IXTT     /* Xtalk tail timeout */
  39 #define IIO_IO_ERR_CLR          IIO_IECLR    /* IO error clear */
  40 #define IIO_BTE_CRB_CNT         IIO_IBCN     /* IO BTE CRB count */
  41
  42 #define IIO_LLP_CSR_IS_UP               0x00002000
  43 #define IIO_LLP_CSR_LLP_STAT_MASK       0x00003000
  44 #define IIO_LLP_CSR_LLP_STAT_SHFT       12
  45
  46 /* key to IIO_PROTECT_OVRRD */
  47 #define IIO_PROTECT_OVRRD_KEY   0x53474972756c6573ull   /* "SGIrules" */
  48
  49 /* BTE register names */
  50 #define IIO_BTE_STAT_0          IIO_IBLS_0   /* Also BTE length/status 0 */
  51 #define IIO_BTE_SRC_0           IIO_IBSA_0   /* Also BTE source address  0 */
  52 #define IIO_BTE_DEST_0          IIO_IBDA_0   /* Also BTE dest. address 0 */
  53 #define IIO_BTE_CTRL_0          IIO_IBCT_0   /* Also BTE control/terminate 0 */
  54 #define IIO_BTE_NOTIFY_0        IIO_IBNA_0   /* Also BTE notification 0 */
  55 #define IIO_BTE_INT_0           IIO_IBIA_0   /* Also BTE interrupt 0 */
  56 #define IIO_BTE_OFF_0           0            /* Base offset from BTE 0 regs. */
  57 #define IIO_BTE_OFF_1   IIO_IBLS_1 - IIO_IBLS_0 /* Offset from base to BTE 1 */
  58
  59 /* BTE register offsets from base */
  60 #define BTEOFF_STAT             0
  61 #define BTEOFF_SRC              (IIO_BTE_SRC_0 - IIO_BTE_STAT_0)
  62 #define BTEOFF_DEST             (IIO_BTE_DEST_0 - IIO_BTE_STAT_0)
  63 #define BTEOFF_CTRL             (IIO_BTE_CTRL_0 - IIO_BTE_STAT_0)
  64 #define BTEOFF_NOTIFY           (IIO_BTE_NOTIFY_0 - IIO_BTE_STAT_0)
  65 #define BTEOFF_INT              (IIO_BTE_INT_0 - IIO_BTE_STAT_0)
  66
  67
  68 /*
  69  * The following definitions use the names defined in the IO interface
  70  * document for ease of reference.  When possible, software should
  71  * generally use the longer but clearer names defined above.
  72  */
  73
  74 #define IIO_BASE        0x400000
  75 #define IIO_BASE_BTE0   0x410000
  76 #define IIO_BASE_BTE1   0x420000
  77 #define IIO_BASE_PERF   0x430000
  78 #define IIO_PERF_CNT    0x430008
  79
  80 #define IO_PERF_SETS    32
  81
  82 #define IIO_WID         0x400000        /* Widget identification */
  83 #define IIO_WSTAT       0x400008        /* Widget status */
  84 #define IIO_WCR         0x400020        /* Widget control */
  85
  86 #define IIO_WSTAT_ECRAZY        (1ULL << 32)    /* Hub gone crazy */
  87 #define IIO_WSTAT_TXRETRY       (1ULL << 9)     /* Hub Tx Retry timeout */
  88 #define IIO_WSTAT_TXRETRY_MASK  (0x7F)
  89 #define IIO_WSTAT_TXRETRY_SHFT  (16)
  90 #define IIO_WSTAT_TXRETRY_CNT(w)        (((w) >> IIO_WSTAT_TXRETRY_SHFT) & \
  91                                           IIO_WSTAT_TXRETRY_MASK)
  92
  93 #define IIO_ILAPR       0x400100        /* Local Access Protection */
  94 #define IIO_ILAPO       0x400108        /* Protection override */
  95 #define IIO_IOWA        0x400110        /* outbound widget access */
  96 #define IIO_IIWA        0x400118        /* inbound widget access */
  97 #define IIO_IIDEM       0x400120        /* Inbound Device Error Mask */
  98 #define IIO_ILCSR       0x400128        /* LLP control and status */
  99 #define IIO_ILLR        0x400130        /* LLP Log */
 100 #define IIO_IIDSR       0x400138        /* Interrupt destination */
 101
 102 #define IIO_IIBUSERR    0x1400208       /* Reads here cause a bus error. */
 103
 104 /* IO Interrupt Destination Register */
 105 #define IIO_IIDSR_SENT_SHIFT    28
 106 #define IIO_IIDSR_SENT_MASK     0x10000000
 107 #define IIO_IIDSR_ENB_SHIFT     24
 108 #define IIO_IIDSR_ENB_MASK      0x01000000
 109 #define IIO_IIDSR_NODE_SHIFT    8
 110 #define IIO_IIDSR_NODE_MASK     0x0000ff00
 111 #define IIO_IIDSR_LVL_SHIFT     0
 112 #define IIO_IIDSR_LVL_MASK      0x0000003f
 113
 114
 115 /* GFX Flow Control Node/Widget Register */
 116 #define IIO_IGFX_0      0x400140        /* gfx node/widget register 0 */
 117 #define IIO_IGFX_1      0x400148        /* gfx node/widget register 1 */
 118 #define IIO_IGFX_W_NUM_BITS     4       /* size of widget num field */
 119 #define IIO_IGFX_W_NUM_MASK     ((1<<IIO_IGFX_W_NUM_BITS)-1)
 120 #define IIO_IGFX_W_NUM_SHIFT    0
 121 #define IIO_IGFX_N_NUM_BITS     9       /* size of node num field */
 122 #define IIO_IGFX_N_NUM_MASK     ((1<<IIO_IGFX_N_NUM_BITS)-1)
 123 #define IIO_IGFX_N_NUM_SHIFT    4
 124 #define IIO_IGFX_P_NUM_BITS     1       /* size of processor num field */
 125 #define IIO_IGFX_P_NUM_MASK     ((1<<IIO_IGFX_P_NUM_BITS)-1)
 126 #define IIO_IGFX_P_NUM_SHIFT    16
 127 #define IIO_IGFX_VLD_BITS       1       /* size of valid field */
 128 #define IIO_IGFX_VLD_MASK       ((1<<IIO_IGFX_VLD_BITS)-1)
 129 #define IIO_IGFX_VLD_SHIFT      20
 130 #define IIO_IGFX_INIT(widget, node, cpu, valid)                         (\
 131         (((widget) & IIO_IGFX_W_NUM_MASK) << IIO_IGFX_W_NUM_SHIFT) |     \
 132         (((node)   & IIO_IGFX_N_NUM_MASK) << IIO_IGFX_N_NUM_SHIFT) |     \
 133         (((cpu)    & IIO_IGFX_P_NUM_MASK) << IIO_IGFX_P_NUM_SHIFT) |     \
 134         (((valid)  & IIO_IGFX_VLD_MASK)   << IIO_IGFX_VLD_SHIFT)         )
 135
 136 /* Scratch registers (not all bits available) */
 137 #define IIO_SCRATCH_REG0        0x400150
 138 #define IIO_SCRATCH_REG1        0x400158
 139 #define IIO_SCRATCH_MASK        0x0000000f00f11fff
 140
 141 #define IIO_SCRATCH_BIT0_0      0x0000000800000000
 142 #define IIO_SCRATCH_BIT0_1      0x0000000400000000
 143 #define IIO_SCRATCH_BIT0_2      0x0000000200000000
 144 #define IIO_SCRATCH_BIT0_3      0x0000000100000000
 145 #define IIO_SCRATCH_BIT0_4      0x0000000000800000
 146 #define IIO_SCRATCH_BIT0_5      0x0000000000400000
 147 #define IIO_SCRATCH_BIT0_6      0x0000000000200000
 148 #define IIO_SCRATCH_BIT0_7      0x0000000000100000
 149 #define IIO_SCRATCH_BIT0_8      0x0000000000010000
 150 #define IIO_SCRATCH_BIT0_9      0x0000000000001000
 151 #define IIO_SCRATCH_BIT0_R      0x0000000000000fff
 152
 153 /* IO Translation Table Entries */
 154 #define IIO_NUM_ITTES   7               /* ITTEs numbered 0..6 */
 155                                         /* Hw manuals number them 1..7! */
 156
 157 /*
 158  * As a permanent workaround for a bug in the PI side of the hub, we've
 159  * redefined big window 7 as small window 0.
 160  */
 161 #define HUB_NUM_BIG_WINDOW      IIO_NUM_ITTES - 1
 162
 163 /*
 164  * Use the top big window as a surrogate for the first small window
 165  */
 166 #define SWIN0_BIGWIN            HUB_NUM_BIG_WINDOW
 167
 168 #define ILCSR_WARM_RESET        0x100
 169 /*
 170  * The IO LLP control status register and widget control register
 171  */
 172 #ifndef __ASSEMBLY__
 173
 174 typedef union hubii_wid_u {
 175         u64     wid_reg_value;
 176         struct {
 177                 u64     wid_rsvd:       32,     /* unused */
 178                         wid_rev_num:     4,     /* revision number */
 179                         wid_part_num:   16,     /* the widget type: hub=c101 */
 180                         wid_mfg_num:    11,     /* Manufacturer id (IBM) */
 181                         wid_rsvd1:       1;     /* Reserved */
 182         } wid_fields_s;
 183 } hubii_wid_t;
 184
 185
 186 typedef union hubii_wcr_u {
 187         u64     wcr_reg_value;
 188         struct {
 189                 u64     wcr_rsvd:       41,     /* unused */
 190                         wcr_e_thresh:    5,     /* elasticity threshold */
 191                         wcr_dir_con:     1,     /* widget direct connect */
 192                         wcr_f_bad_pkt:   1,     /* Force bad llp pkt enable */
 193                         wcr_xbar_crd:    3,     /* LLP crossbar credit */
 194                         wcr_rsvd1:       8,     /* Reserved */
 195                         wcr_tag_mode:    1,     /* Tag mode */
 196                         wcr_widget_id:   4;     /* LLP crossbar credit */
 197         } wcr_fields_s;
 198 } hubii_wcr_t;
 199
 200 #define iwcr_dir_con    wcr_fields_s.wcr_dir_con
 201
 202 typedef union hubii_wstat_u {
 203         u64      reg_value;
 204         struct {
 205                 u64     rsvd1:          31,
 206                         crazy:           1,     /* Crazy bit            */
 207                         rsvd2:           8,
 208                         llp_tx_cnt:      8,     /* LLP Xmit retry counter */
 209                         rsvd3:           6,
 210                         tx_max_rtry:     1,     /* LLP Retry Timeout Signal */
 211                         rsvd4:           2,
 212                         xt_tail_to:      1,     /* Xtalk Tail Timeout   */
 213                         xt_crd_to:       1,     /* Xtalk Credit Timeout */
 214                         pending:         4;     /* Pending Requests     */
 215         } wstat_fields_s;
 216 } hubii_wstat_t;
 217
 218
 219 typedef union hubii_ilcsr_u {
 220         u64     icsr_reg_value;
 221         struct {
 222                 u64     icsr_rsvd:      22,     /* unused */
 223                         icsr_max_burst: 10,     /* max burst */
 224                         icsr_rsvd4:      6,     /* reserved */
 225                         icsr_max_retry: 10,     /* max retry */
 226                         icsr_rsvd3:      2,     /* reserved */
 227                         icsr_lnk_stat:   2,     /* link status */
 228                         icsr_bm8:        1,     /* Bit mode 8 */
 229                         icsr_llp_en:     1,     /* LLP enable bit */
 230                         icsr_rsvd2:      1,     /* reserver */
 231                         icsr_wrm_reset:  1,     /* Warm reset bit */
 232                         icsr_rsvd1:      2,     /* Data ready offset */
 233                         icsr_null_to:    6;     /* Null timeout   */
 234
 235         } icsr_fields_s;
 236 } hubii_ilcsr_t;
 237
 238
 239 typedef union hubii_iowa_u {
 240         u64     iowa_reg_value;
 241         struct {
 242                 u64     iowa_rsvd:      48,     /* unused */
 243                         iowa_wxoac:      8,     /* xtalk widget access bits */
 244                         iowa_rsvd1:      7,     /* xtalk widget access bits */
 245                         iowa_w0oac:      1;     /* xtalk widget access bits */
 246         } iowa_fields_s;
 247 } hubii_iowa_t;
 248
 249 typedef union hubii_iiwa_u {
 250         u64     iiwa_reg_value;
 251         struct {
 252                 u64     iiwa_rsvd:      48,     /* unused */
 253                         iiwa_wxiac:      8,     /* hub wid access bits */
 254                         iiwa_rsvd1:      7,     /* reserved */
 255                         iiwa_w0iac:      1;     /* hub wid0 access */
 256         } iiwa_fields_s;
 257 } hubii_iiwa_t;
 258
 259 typedef union   hubii_illr_u {
 260         u64     illr_reg_value;
 261         struct {
 262                 u64     illr_rsvd:      32,     /* unused */
 263                         illr_cb_cnt:    16,     /* checkbit error count */
 264                         illr_sn_cnt:    16;     /* sequence number count */
 265         } illr_fields_s;
 266 } hubii_illr_t;
 267
 268 /* The structures below are defined to extract and modify the ii
 269 performance registers */
 270
 271 /* io_perf_sel allows the caller to specify what tests will be
 272    performed */
 273 typedef union io_perf_sel {
 274         u64 perf_sel_reg;
 275         struct {
 276                 u64     perf_rsvd  : 48,
 277                         perf_icct  :  8,
 278                         perf_ippr1 :  4,
 279                         perf_ippr0 :  4;
 280         } perf_sel_bits;
 281 } io_perf_sel_t;
 282
 283 /* io_perf_cnt is to extract the count from the hub registers. Due to
 284    hardware problems there is only one counter, not two. */
 285
 286 typedef union io_perf_cnt {
 287         u64     perf_cnt;
 288         struct {
 289                 u64     perf_rsvd1 : 32,
 290                         perf_rsvd2 : 12,
 291                         perf_cnt   : 20;
 292         } perf_cnt_bits;
 293 } io_perf_cnt_t;
 294
 295 #endif /* !__ASSEMBLY__ */
 296
 297
 298 #define LNK_STAT_WORKING        0x2
 299
 300 #define IIO_LLP_CB_MAX  0xffff
 301 #define IIO_LLP_SN_MAX  0xffff
 302
 303 /* IO PRB Entries */
 304 #define IIO_NUM_IPRBS   (9)
 305 #define IIO_IOPRB_0     0x400198        /* PRB entry 0 */
 306 #define IIO_IOPRB_8     0x4001a0        /* PRB entry 8 */
 307 #define IIO_IOPRB_9     0x4001a8        /* PRB entry 9 */
 308 #define IIO_IOPRB_A     0x4001b0        /* PRB entry a */
 309 #define IIO_IOPRB_B     0x4001b8        /* PRB entry b */
 310 #define IIO_IOPRB_C     0x4001c0        /* PRB entry c */
 311 #define IIO_IOPRB_D     0x4001c8        /* PRB entry d */
 312 #define IIO_IOPRB_E     0x4001d0        /* PRB entry e */
 313 #define IIO_IOPRB_F     0x4001d8        /* PRB entry f */
 314
 315
 316 #define IIO_IXCC        0x4001e0        /* Crosstalk credit count timeout */
 317 #define IIO_IXTCC       IIO_IXCC
 318 #define IIO_IMEM        0x4001e8        /* Miscellaneous Enable Mask */
 319 #define IIO_IXTT        0x4001f0        /* Crosstalk tail timeout */
 320 #define IIO_IECLR       0x4001f8        /* IO error clear */
 321 #define IIO_IBCN        0x400200        /* IO BTE CRB count */
 322
 323 /*
 324  * IIO_IMEM Register fields.
 325  */
 326 #define IIO_IMEM_W0ESD  0x1             /* Widget 0 shut down due to error */
 327 #define IIO_IMEM_B0ESD  (1 << 4)        /* BTE 0 shut down due to error */
 328 #define IIO_IMEM_B1ESD  (1 << 8)        /* BTE 1 Shut down due to error */
 329
 330 /* PIO Read address Table Entries */
 331 #define IIO_IPCA        0x400300        /* PRB Counter adjust */
 332 #define IIO_NUM_PRTES   8               /* Total number of PRB table entries */
 333 #define IIO_PRTE_0      0x400308        /* PIO Read address table entry 0 */
 334 #define IIO_PRTE(_x)    (IIO_PRTE_0 + (8 * (_x)))
 335 #define IIO_WIDPRTE(x)  IIO_PRTE(((x) - 8)) /* widget ID to its PRTE num */
 336 #define IIO_IPDR        0x400388        /* PIO table entry deallocation */
 337 #define IIO_ICDR        0x400390        /* CRB Entry Deallocation */
 338 #define IIO_IFDR        0x400398        /* IOQ FIFO Depth */
 339 #define IIO_IIAP        0x4003a0        /* IIQ Arbitration Parameters */
 340 #define IIO_IMMR        IIO_IIAP
 341 #define IIO_ICMR        0x4003a8        /* CRB Management Register */
 342 #define IIO_ICCR        0x4003b0        /* CRB Control Register */
 343 #define IIO_ICTO        0x4003b8        /* CRB Time Out Register */
 344 #define IIO_ICTP        0x4003c0        /* CRB Time Out Prescalar */
 345
 346
 347 /*
 348  * ICMR register fields
 349  */
 350 #define IIO_ICMR_PC_VLD_SHFT    36
 351 #define IIO_ICMR_PC_VLD_MASK    (0x7fffUL << IIO_ICMR_PC_VLD_SHFT)
 352
 353 #define IIO_ICMR_CRB_VLD_SHFT   20
 354 #define IIO_ICMR_CRB_VLD_MASK   (0x7fffUL << IIO_ICMR_CRB_VLD_SHFT)
 355
 356 #define IIO_ICMR_FC_CNT_SHFT    16
 357 #define IIO_ICMR_FC_CNT_MASK    (0xf << IIO_ICMR_FC_CNT_SHFT)
 358
 359 #define IIO_ICMR_C_CNT_SHFT     4
 360 #define IIO_ICMR_C_CNT_MASK     (0xf << IIO_ICMR_C_CNT_SHFT)
 361
 362 #define IIO_ICMR_P_CNT_SHFT     0
 363 #define IIO_ICMR_P_CNT_MASK     (0xf << IIO_ICMR_P_CNT_SHFT)
 364
 365 #define IIO_ICMR_PRECISE        (1UL << 52)
 366 #define IIO_ICMR_CLR_RPPD       (1UL << 13)
 367 #define IIO_ICMR_CLR_RQPD       (1UL << 12)
 368
 369 /*
 370  * IIO PIO Deallocation register field masks : (IIO_IPDR)
 371  */
 372 #define IIO_IPDR_PND    (1 << 4)
 373
 374 /*
 375  * IIO CRB deallocation register field masks: (IIO_ICDR)
 376  */
 377 #define IIO_ICDR_PND    (1 << 4)
 378
 379 /*
 380  * IIO CRB control register Fields: IIO_ICCR
 381  */
 382 #define IIO_ICCR_PENDING        (0x10000)
 383 #define IIO_ICCR_CMD_MASK       (0xFF)
 384 #define IIO_ICCR_CMD_SHFT       (7)
 385 #define IIO_ICCR_CMD_NOP        (0x0)   /* No Op */
 386 #define IIO_ICCR_CMD_WAKE       (0x100) /* Reactivate CRB entry and process */
 387 #define IIO_ICCR_CMD_TIMEOUT    (0x200) /* Make CRB timeout & mark invalid */
 388 #define IIO_ICCR_CMD_EJECT      (0x400) /* Contents of entry written to memory
 389                                          * via a WB
 390                                          */
 391 #define IIO_ICCR_CMD_FLUSH      (0x800)
 392
 393 /*
 394  * CRB manipulation macros
 395  *      The CRB macros are slightly complicated, since there are up to
 396  *      four registers associated with each CRB entry.
 397  */
 398 #define IIO_NUM_CRBS            15      /* Number of CRBs */
 399 #define IIO_NUM_NORMAL_CRBS     12      /* Number of regular CRB entries */
 400 #define IIO_NUM_PC_CRBS         4       /* Number of partial cache CRBs */
 401 #define IIO_ICRB_OFFSET         8
 402 #define IIO_ICRB_0              0x400400
 403 /* XXX - This is now tuneable:
 404         #define IIO_FIRST_PC_ENTRY 12
 405  */
 406
 407 #define IIO_ICRB_A(_x)  (IIO_ICRB_0 + (4 * IIO_ICRB_OFFSET * (_x)))
 408 #define IIO_ICRB_B(_x)  (IIO_ICRB_A(_x) + 1*IIO_ICRB_OFFSET)
 409 #define IIO_ICRB_C(_x)  (IIO_ICRB_A(_x) + 2*IIO_ICRB_OFFSET)
 410 #define IIO_ICRB_D(_x)  (IIO_ICRB_A(_x) + 3*IIO_ICRB_OFFSET)
 411
 412 /* XXX - IBUE register coming for Hub 2 */
 413
 414 /*
 415  *
 416  * CRB Register description.
 417  *
 418  * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING
 419  * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING
 420  * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING
 421  * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING
 422  * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING
 423  *
 424  * Many of the fields in CRB are status bits used by hardware
 425  * for implementation of the protocol. It's very dangerous to
 426  * mess around with the CRB registers.
 427  *
 428  * It's OK to read the CRB registers and try to make sense out of the
 429  * fields in CRB.
 430  *
 431  * Updating CRB requires all activities in Hub IIO to be quiesced.
 432  * otherwise, a write to CRB could corrupt other CRB entries.
 433  * CRBs are here only as a back door peek to hub IIO's status.
 434  * Quiescing implies  no dmas no PIOs
 435  * either directly from the cpu or from sn0net.
 436  * this is not something that can be done easily. So, AVOID updating
 437  * CRBs.
 438  */
 439
 440 /*
 441  * Fields in CRB Register A
 442  */
 443 #ifndef __ASSEMBLY__
 444 typedef union icrba_u {
 445         u64     reg_value;
 446         struct {
 447                 u64     resvd:  6,
 448                         stall_bte0: 1,  /* Stall BTE 0 */
 449                         stall_bte1: 1,  /* Stall BTE 1 */
 450                         error:  1,      /* CRB has an error     */
 451                         ecode:  3,      /* Error Code           */
 452                         lnetuce: 1,     /* SN0net Uncorrectable error */
 453                         mark:   1,      /* CRB Has been marked  */
 454                         xerr:   1,      /* Error bit set in xtalk header */
 455                         sidn:   4,      /* SIDN field from xtalk        */
 456                         tnum:   5,      /* TNUM field in xtalk          */
 457                         addr:   38,     /* Address of request   */
 458                         valid:  1,      /* Valid status         */
 459                         iow:    1;      /* IO Write operation   */
 460         } icrba_fields_s;
 461 } icrba_t;
 462
 463 /* This is an alternate typedef for the HUB1 CRB A in order to allow
 464    runtime selection of the format based on the REV_ID field of the
 465    NI_STATUS_REV_ID register. */
 466 typedef union h1_icrba_u {
 467         u64     reg_value;
 468
 469         struct {
 470                 u64     resvd:  6,
 471                         unused: 1,      /* Unused but RW!!      */
 472                         error:  1,      /* CRB has an error     */
 473                         ecode:  4,      /* Error Code           */
 474                         lnetuce: 1,     /* SN0net Uncorrectable error */
 475                         mark:   1,      /* CRB Has been marked  */
 476                         xerr:   1,      /* Error bit set in xtalk header */
 477                         sidn:   4,      /* SIDN field from xtalk        */
 478                         tnum:   5,      /* TNUM field in xtalk          */
 479                         addr:   38,     /* Address of request   */
 480                         valid:  1,      /* Valid status         */
 481                         iow:    1;      /* IO Write operation   */
 482         } h1_icrba_fields_s;
 483 } h1_icrba_t;
 484
 485 /* XXX - Is this still right?  Check the spec. */
 486 #define ICRBN_A_CERR_SHFT       54
 487 #define ICRBN_A_ERR_MASK        0x3ff
 488
 489 #endif /* !__ASSEMBLY__ */
 490
 491 #define IIO_ICRB_ADDR_SHFT      2       /* Shift to get proper address */
 492
 493 /*
 494  * values for "ecode" field
 495  */
 496 #define IIO_ICRB_ECODE_DERR     0       /* Directory error due to IIO access */
 497 #define IIO_ICRB_ECODE_PERR     1       /* Poison error on IO access */
 498 #define IIO_ICRB_ECODE_WERR     2       /* Write error by IIO access
 499                                          * e.g. WINV to a Read only line.
 500                                          */
 501 #define IIO_ICRB_ECODE_AERR     3       /* Access error caused by IIO access */
 502 #define IIO_ICRB_ECODE_PWERR    4       /* Error on partial write       */
 503 #define IIO_ICRB_ECODE_PRERR    5       /* Error on partial read        */
 504 #define IIO_ICRB_ECODE_TOUT     6       /* CRB timeout before deallocating */
 505 #define IIO_ICRB_ECODE_XTERR    7       /* Incoming xtalk pkt had error bit */
 506
 507
 508
 509 /*
 510  * Fields in CRB Register B
 511  */
 512 #ifndef __ASSEMBLY__
 513 typedef union icrbb_u {
 514         u64     reg_value;
 515         struct {
 516             u64 rsvd1:  5,
 517                 btenum: 1,      /* BTE to which entry belongs to */
 518                 cohtrans: 1,    /* Coherent transaction */
 519                 xtsize: 2,      /* Xtalk operation size
 520                                  * 0: Double Word
 521                                  * 1: 32 Bytes.
 522                                  * 2: 128 Bytes,
 523                                  * 3: Reserved.
 524                                  */
 525                 srcnode: 9,     /* Source Node ID               */
 526                 srcinit: 2,     /* Source Initiator:
 527                                  * See below for field values.
 528                                  */
 529                 useold: 1,      /* Use OLD command for processing */
 530                 imsgtype: 2,    /* Incoming message type
 531                                  * see below for field values
 532                                  */
 533                 imsg:   8,      /* Incoming message     */
 534                 initator: 3,    /* Initiator of original request
 535                                  * See below for field values.
 536                                  */
 537                 reqtype: 5,     /* Identifies type of request
 538                                  * See below for field values.
 539                                  */
 540                 rsvd2:  7,
 541                 ackcnt: 11,     /* Invalidate ack count */
 542                 resp:   1,      /* data response  given to processor */
 543                 ack:    1,      /* indicates data ack received  */
 544                 hold:   1,      /* entry is gathering inval acks */
 545                 wb_pend:1,      /* waiting for writeback to complete */
 546                 intvn:  1,      /* Intervention */
 547                 stall_ib: 1,    /* Stall Ibuf (from crosstalk) */
 548                 stall_intr: 1;  /* Stall internal interrupts */
 549         } icrbb_field_s;
 550 } icrbb_t;
 551
 552 /* This is an alternate typedef for the HUB1 CRB B in order to allow
 553    runtime selection of the format based on the REV_ID field of the
 554    NI_STATUS_REV_ID register. */
 555 typedef union h1_icrbb_u {
 556         u64     reg_value;
 557         struct {
 558                 u64     rsvd1:  5,
 559                         btenum: 1,      /* BTE to which entry belongs to */
 560                         cohtrans: 1,    /* Coherent transaction */
 561                         xtsize: 2,      /* Xtalk operation size
 562                                          * 0: Double Word
 563                                          * 1: 32 Bytes.
 564                                          * 2: 128 Bytes,
 565                                          * 3: Reserved.
 566                                          */
 567                         srcnode: 9,     /* Source Node ID               */
 568                         srcinit: 2,     /* Source Initiator:
 569                                          * See below for field values.
 570                                          */
 571                         useold: 1,      /* Use OLD command for processing */
 572                         imsgtype: 2,    /* Incoming message type
 573                                          * see below for field values
 574                                          */
 575                         imsg:   8,      /* Incoming message     */
 576                         initator: 3,    /* Initiator of original request
 577                                          * See below for field values.
 578                                          */
 579                         rsvd2:  1,
 580                         pcache: 1,      /* entry belongs to partial cache */
 581                         reqtype: 5,     /* Identifies type of request
 582                                          * See below for field values.
 583                                          */
 584                         stl_ib: 1,      /* stall Ibus coming from xtalk */
 585                         stl_intr: 1,    /* Stall internal interrupts */
 586                         stl_bte0: 1,    /* Stall BTE 0  */
 587                         stl_bte1: 1,    /* Stall BTE 1  */
 588                         intrvn: 1,      /* Req was target of intervention */
 589                         ackcnt: 11,     /* Invalidate ack count */
 590                         resp:   1,      /* data response  given to processor */
 591                         ack:    1,      /* indicates data ack received  */
 592                         hold:   1,      /* entry is gathering inval acks */
 593                         wb_pend:1,      /* waiting for writeback to complete */
 594                         sleep:  1,      /* xtalk req sleeping till IO-sync */
 595                         pnd_reply: 1,   /* replies not issed due to IOQ full */
 596                         pnd_req: 1;     /* reqs not issued due to IOQ full */
 597         } h1_icrbb_field_s;
 598 } h1_icrbb_t;
 599
 600
 601 #define b_imsgtype      icrbb_field_s.imsgtype
 602 #define b_btenum        icrbb_field_s.btenum
 603 #define b_cohtrans      icrbb_field_s.cohtrans
 604 #define b_xtsize        icrbb_field_s.xtsize
 605 #define b_srcnode       icrbb_field_s.srcnode
 606 #define b_srcinit       icrbb_field_s.srcinit
 607 #define b_imsgtype      icrbb_field_s.imsgtype
 608 #define b_imsg          icrbb_field_s.imsg
 609 #define b_initiator     icrbb_field_s.initiator
 610
 611 #endif /* !__ASSEMBLY__ */
 612
 613 /*
 614  * values for field xtsize
 615  */
 616 #define IIO_ICRB_XTSIZE_DW      0       /* Xtalk operation size is 8 bytes  */
 617 #define IIO_ICRB_XTSIZE_32      1       /* Xtalk operation size is 32 bytes */
 618 #define IIO_ICRB_XTSIZE_128     2       /* Xtalk operation size is 128 bytes */
 619
 620 /*
 621  * values for field srcinit
 622  */
 623 #define IIO_ICRB_PROC0          0       /* Source of request is Proc 0 */
 624 #define IIO_ICRB_PROC1          1       /* Source of request is Proc 1 */
 625 #define IIO_ICRB_GB_REQ         2       /* Source is Guaranteed BW request */
 626 #define IIO_ICRB_IO_REQ         3       /* Source is Normal IO request  */
 627
 628 /*
 629  * Values for field imsgtype
 630  */
 631 #define IIO_ICRB_IMSGT_XTALK    0       /* Incoming Message from Xtalk */
 632 #define IIO_ICRB_IMSGT_BTE      1       /* Incoming message from BTE    */
 633 #define IIO_ICRB_IMSGT_SN0NET   2       /* Incoming message from SN0 net */
 634 #define IIO_ICRB_IMSGT_CRB      3       /* Incoming message from CRB ???  */
 635
 636 /*
 637  * values for field initiator.
 638  */
 639 #define IIO_ICRB_INIT_XTALK     0       /* Message originated in xtalk  */
 640 #define IIO_ICRB_INIT_BTE0      0x1     /* Message originated in BTE 0  */
 641 #define IIO_ICRB_INIT_SN0NET    0x2     /* Message originated in SN0net */
 642 #define IIO_ICRB_INIT_CRB       0x3     /* Message originated in CRB ?  */
 643 #define IIO_ICRB_INIT_BTE1      0x5     /* MEssage originated in BTE 1  */
 644
 645 /*
 646  * Values for field reqtype.
 647  */
 648 /* XXX - Need to fix this for Hub 2 */
 649 #define IIO_ICRB_REQ_DWRD       0       /* Request type double word     */
 650 #define IIO_ICRB_REQ_QCLRD      1       /* Request is Qrtr Caceh line Rd */
 651 #define IIO_ICRB_REQ_BLKRD      2       /* Request is block read        */
 652 #define IIO_ICRB_REQ_RSHU       6       /* Request is BTE block read    */
 653 #define IIO_ICRB_REQ_REXU       7       /* request is BTE Excl Read     */
 654 #define IIO_ICRB_REQ_RDEX       8       /* Request is Read Exclusive    */
 655 #define IIO_ICRB_REQ_WINC       9       /* Request is Write Invalidate  */
 656 #define IIO_ICRB_REQ_BWINV      10      /* Request is BTE Winv          */
 657 #define IIO_ICRB_REQ_PIORD      11      /* Request is PIO read          */
 658 #define IIO_ICRB_REQ_PIOWR      12      /* Request is PIO Write         */
 659 #define IIO_ICRB_REQ_PRDM       13      /* Request is Fetch&Op          */
 660 #define IIO_ICRB_REQ_PWRM       14      /* Request is Store &Op         */
 661 #define IIO_ICRB_REQ_PTPWR      15      /* Request is Peer to peer      */
 662 #define IIO_ICRB_REQ_WB         16      /* Request is Write back        */
 663 #define IIO_ICRB_REQ_DEX        17      /* Retained DEX Cache line      */
 664
 665 /*
 666  * Fields in CRB Register C
 667  */
 668
 669 #ifndef __ASSEMBLY__
 670
 671 typedef union icrbc_s {
 672         u64     reg_value;
 673         struct {
 674                 u64     rsvd:   6,
 675                         sleep:  1,
 676                         pricnt: 4,      /* Priority count sent with Read req */
 677                         pripsc: 4,      /* Priority Pre scalar  */
 678                         bteop:  1,      /* BTE Operation        */
 679                         push_be: 34,    /* Push address Byte enable
 680                                          * Holds push addr, if CRB is for BTE
 681                                          * If CRB belongs to Partial cache,
 682                                          * this contains byte enables bits
 683                                          * ([47:46] = 0)
 684                                          */
 685                         suppl:  11,     /* Supplemental field   */
 686                         barrop: 1,      /* Barrier Op bit set in xtalk req */
 687                         doresp: 1,      /* Xtalk req needs a response   */
 688                         gbr:    1;      /* GBR bit set in xtalk packet  */
 689         } icrbc_field_s;
 690 } icrbc_t;
 691
 692 #define c_pricnt        icrbc_field_s.pricnt
 693 #define c_pripsc        icrbc_field_s.pripsc
 694 #define c_bteop         icrbc_field_s.bteop
 695 #define c_bteaddr       icrbc_field_s.push_be   /* push_be field has 2 names */
 696 #define c_benable       icrbc_field_s.push_be   /* push_be field has 2 names */
 697 #define c_suppl         icrbc_field_s.suppl
 698 #define c_barrop        icrbc_field_s.barrop
 699 #define c_doresp        icrbc_field_s.doresp
 700 #define c_gbr   icrbc_field_s.gbr
 701 #endif /* !__ASSEMBLY__ */
 702
 703 /*
 704  * Fields in CRB Register D
 705  */
 706
 707 #ifndef __ASSEMBLY__
 708 typedef union icrbd_s {
 709         u64     reg_value;
 710         struct {
 711             u64 rsvd:   38,
 712                 toutvld: 1,     /* Timeout in progress for this CRB */
 713                 ctxtvld: 1,     /* Context field below is valid */
 714                 rsvd2:  1,
 715                 context: 15,    /* Bit vector:
 716                                  * Has a bit set for each CRB entry
 717                                  * which needs to be deallocated
 718                                  * before this CRB entry is processed.
 719                                  * Set only for barrier operations.
 720                                  */
 721                 timeout: 8;     /* Timeout Upper 8 bits */
 722         } icrbd_field_s;
 723 } icrbd_t;
 724
 725 #define icrbd_toutvld   icrbd_field_s.toutvld
 726 #define icrbd_ctxtvld   icrbd_field_s.ctxtvld
 727 #define icrbd_context   icrbd_field_s.context
 728
 729
 730 typedef union hubii_ifdr_u {
 731         u64     hi_ifdr_value;
 732         struct {
 733                 u64     ifdr_rsvd:      49,
 734                         ifdr_maxrp:      7,
 735                         ifdr_rsvd1:      1,
 736                         ifdr_maxrq:      7;
 737         } hi_ifdr_fields;
 738 } hubii_ifdr_t;
 739
 740 #endif /* !__ASSEMBLY__ */
 741
 742 /*
 743  * Hardware designed names for the BTE control registers.
 744  */
 745 #define IIO_IBLS_0      0x410000        /* BTE length/status 0 */
 746 #define IIO_IBSA_0      0x410008        /* BTE source address 0 */
 747 #define IIO_IBDA_0      0x410010        /* BTE destination address 0 */
 748 #define IIO_IBCT_0      0x410018        /* BTE control/terminate 0 */
 749 #define IIO_IBNA_0      0x410020        /* BTE notification address 0 */
 750 #define IIO_IBNR_0      IIO_IBNA_0
 751 #define IIO_IBIA_0      0x410028        /* BTE interrupt address 0 */
 752
 753 #define IIO_IBLS_1      0x420000        /* BTE length/status 1 */
 754 #define IIO_IBSA_1      0x420008        /* BTE source address 1 */
 755 #define IIO_IBDA_1      0x420010        /* BTE destination address 1 */
 756 #define IIO_IBCT_1      0x420018        /* BTE control/terminate 1 */
 757 #define IIO_IBNA_1      0x420020        /* BTE notification address 1 */
 758 #define IIO_IBNR_1      IIO_IBNA_1
 759 #define IIO_IBIA_1      0x420028        /* BTE interrupt address 1 */
 760
 761 /*
 762  * More miscellaneous registers
 763  */
 764 #define IIO_IPCR        0x430000        /* Performance Control */
 765 #define IIO_IPPR        0x430008        /* Performance Profiling */
 766
 767 /*
 768  * IO Error Clear register bit field definitions
 769  */
 770 #define IECLR_BTE1              (1 << 18)  /* clear bte error 1 ??? */
 771 #define IECLR_BTE0              (1 << 17)  /* clear bte error 0 ??? */
 772 #define IECLR_CRAZY             (1 << 16)  /* clear crazy bit in wstat reg */
 773 #define IECLR_PRB_F             (1 << 15)  /* clear err bit in PRB_F reg */
 774 #define IECLR_PRB_E             (1 << 14)  /* clear err bit in PRB_E reg */
 775 #define IECLR_PRB_D             (1 << 13)  /* clear err bit in PRB_D reg */
 776 #define IECLR_PRB_C             (1 << 12)  /* clear err bit in PRB_C reg */
 777 #define IECLR_PRB_B             (1 << 11)  /* clear err bit in PRB_B reg */
 778 #define IECLR_PRB_A             (1 << 10)  /* clear err bit in PRB_A reg */
 779 #define IECLR_PRB_9             (1 << 9)   /* clear err bit in PRB_9 reg */
 780 #define IECLR_PRB_8             (1 << 8)   /* clear err bit in PRB_8 reg */
 781 #define IECLR_PRB_0             (1 << 0)   /* clear err bit in PRB_0 reg */
 782
 783 /*
 784  * IO PIO Read Table Entry format
 785  */
 786
 787 #ifndef __ASSEMBLY__
 788
 789 typedef union iprte_a {
 790         u64     entry;
 791         struct {
 792             u64 rsvd1     : 7,  /* Reserved field               */
 793                 valid     : 1,  /* Maps to a timeout entry      */
 794                 rsvd2     : 1,
 795                 srcnode   : 9,  /* Node which did this PIO      */
 796                 initiator : 2,  /* If T5A or T5B or IO          */
 797                 rsvd3     : 3,
 798                 addr      : 38, /* Physical address of PIO      */
 799                 rsvd4     : 3;
 800         } iprte_fields;
 801 } iprte_a_t;
 802
 803 #define iprte_valid     iprte_fields.valid
 804 #define iprte_timeout   iprte_fields.timeout
 805 #define iprte_srcnode   iprte_fields.srcnode
 806 #define iprte_init      iprte_fields.initiator
 807 #define iprte_addr      iprte_fields.addr
 808
 809 #endif /* !__ASSEMBLY__ */
 810
 811 #define IPRTE_ADDRSHFT  3
 812
 813 /*
 814  * Hub IIO PRB Register format.
 815  */
 816
 817 #ifndef __ASSEMBLY__
 818 /*
 819  * Note: Fields bnakctr, anakctr, xtalkctrmode, ovflow fields are
 820  * "Status" fields, and should only be used in case of clean up after errors.
 821  */
 822
 823 typedef union iprb_u {
 824         u64     reg_value;
 825         struct {
 826             u64 rsvd1:  15,
 827                 error:  1,      /* Widget rcvd wr resp pkt w/ error */
 828                 ovflow: 5,      /* Overflow count. perf measurement */
 829                 fire_and_forget: 1, /* Launch Write without response */
 830                 mode:   2,      /* Widget operation Mode        */
 831                 rsvd2:  2,
 832                 bnakctr: 14,
 833                 rsvd3:  2,
 834                 anakctr: 14,
 835                 xtalkctr: 8;
 836         } iprb_fields_s;
 837 } iprb_t;
 838
 839 #define iprb_regval     reg_value
 840
 841 #define iprb_error      iprb_fields_s.error
 842 #define iprb_ovflow     iprb_fields_s.ovflow
 843 #define iprb_ff         iprb_fields_s.fire_and_forget
 844 #define iprb_mode       iprb_fields_s.mode
 845 #define iprb_bnakctr    iprb_fields_s.bnakctr
 846 #define iprb_anakctr    iprb_fields_s.anakctr
 847 #define iprb_xtalkctr   iprb_fields_s.xtalkctr
 848
 849 #endif /* !__ASSEMBLY__ */
 850
 851 /*
 852  * values for mode field in iprb_t.
 853  * For details of the meanings of NAK and Accept, refer the PIO flow
 854  * document
 855  */
 856 #define IPRB_MODE_NORMAL        (0)
 857 #define IPRB_MODE_COLLECT_A     (1)     /* PRB in collect A mode */
 858 #define IPRB_MODE_SERVICE_A     (2)     /* NAK B and Accept A */
 859 #define IPRB_MODE_SERVICE_B     (3)     /* NAK A and Accept B */
 860
 861 /*
 862  * IO CRB entry C_A to E_A : Partial (cache) CRBS
 863  */
 864 #ifndef __ASSEMBLY__
 865 typedef union icrbp_a {
 866         u64   ip_reg;       /* the entire register value        */
 867         struct {
 868              u64 error: 1,  /*    63, error occurred            */
 869                 ln_uce: 1,  /*    62: uncorrectable memory      */
 870                 ln_ae:  1,  /*    61: protection violation      */
 871                 ln_werr:1,  /*    60: write access error        */
 872                 ln_aerr:1,  /*    59: sn0net: Address error     */
 873                 ln_perr:1,  /*    58: sn0net: poison error      */
 874                 timeout:1,  /*    57: CRB timed out             */
 875                 l_bdpkt:1,  /*    56: truncated pkt on sn0net   */
 876                 c_bdpkt:1,  /*    55: truncated pkt on xtalk    */
 877                 c_err:  1,  /*    54: incoming xtalk req, err set*/
 878                 rsvd1: 12,  /* 53-42: reserved                  */
 879                 valid:  1,  /*    41: Valid status              */
 880                 sidn:   4,  /* 40-37: SIDN field of xtalk rqst  */
 881                 tnum:   5,  /* 36-32: TNUM of xtalk request     */
 882                 bo:     1,  /*    31: barrier op set in xtalk rqst*/
 883                 resprqd:1,  /*    30: xtalk rqst requires response*/
 884                 gbr:    1,  /*    29: gbr bit set in xtalk rqst */
 885                 size:   2,  /* 28-27: size of xtalk request     */
 886                 excl:   4,  /* 26-23: exclusive bit(s)          */
 887                 stall:  3,  /* 22-20: stall (xtalk, bte 0/1)    */
 888                 intvn:  1,  /*    19: rqst target of intervention*/
 889                 resp:   1,  /*    18: Data response given to t5 */
 890                 ack:    1,  /*    17: Data ack received.        */
 891                 hold:   1,  /*    16: crb gathering invalidate acks*/
 892                 wb:     1,  /*    15: writeback pending.        */
 893                 ack_cnt:11, /* 14-04: counter of invalidate acks*/
 894                 tscaler:4;  /* 03-00: Timeout prescaler         */
 895         } ip_fmt;
 896 } icrbp_a_t;
 897
 898 #endif /* !__ASSEMBLY__ */
 899
 900 /*
 901  * A couple of defines to go with the above structure.
 902  */
 903 #define ICRBP_A_CERR_SHFT       54
 904 #define ICRBP_A_ERR_MASK        0x3ff
 905
 906 #ifndef __ASSEMBLY__
 907 typedef union hubii_idsr {
 908         u64 iin_reg;
 909         struct {
 910                 u64 rsvd1 : 35,
 911                     isent : 1,
 912                     rsvd2 : 3,
 913                     ienable: 1,
 914                     rsvd  : 7,
 915                     node  : 9,
 916                     rsvd4 : 1,
 917                     level : 7;
 918         } iin_fmt;
 919 } hubii_idsr_t;
 920 #endif /* !__ASSEMBLY__ */
 921
 922 /*
 923  * IO BTE Length/Status (IIO_IBLS) register bit field definitions
 924  */
 925 #define IBLS_BUSY               (0x1 << 20)
 926 #define IBLS_ERROR_SHFT         16
 927 #define IBLS_ERROR              (0x1 << IBLS_ERROR_SHFT)
 928 #define IBLS_LENGTH_MASK        0xffff
 929
 930 /*
 931  * IO BTE Control/Terminate register (IBCT) register bit field definitions
 932  */
 933 #define IBCT_POISON             (0x1 << 8)
 934 #define IBCT_NOTIFY             (0x1 << 4)
 935 #define IBCT_ZFIL_MODE          (0x1 << 0)
 936
 937 /*
 938  * IO BTE Interrupt Address Register (IBIA) register bit field definitions
 939  */
 940 #define IBIA_LEVEL_SHFT         16
 941 #define IBIA_LEVEL_MASK         (0x7f << IBIA_LEVEL_SHFT)
 942 #define IBIA_NODE_ID_SHFT       0
 943 #define IBIA_NODE_ID_MASK       (0x1ff)
 944
 945 /*
 946  * Miscellaneous hub constants
 947  */
 948
 949 /* Number of widgets supported by hub */
 950 #define HUB_NUM_WIDGET          9
 951 #define HUB_WIDGET_ID_MIN       0x8
 952 #define HUB_WIDGET_ID_MAX       0xf
 953
 954 #define HUB_WIDGET_PART_NUM     0xc101
 955 #define MAX_HUBS_PER_XBOW       2
 956
 957 /*
 958  * Get a hub's widget id from widget control register
 959  */
 960 #define IIO_WCR_WID_GET(nasid)  (REMOTE_HUB_L(nasid, III_WCR) & 0xf)
 961 #define IIO_WST_ERROR_MASK      (UINT64_CAST 1 << 32) /* Widget status error */
 962
 963 /*
 964  * Number of credits Hub widget has while sending req/response to
 965  * xbow.
 966  * Value of 3 is required by Xbow 1.1
 967  * We may be able to increase this to 4 with Xbow 1.2.
 968  */
 969 #define       HUBII_XBOW_CREDIT       3
 970 #define       HUBII_XBOW_REV2_CREDIT  4
 971
 972 #endif /* _ASM_SGI_SN_SN0_HUBIO_H */