arch/powerpc/include/asm/immap_qe.h

   1 /*
   2  * QUICC Engine (QE) Internal Memory Map.
   3  * The Internal Memory Map for devices with QE on them. This
   4  * is the superset of all QE devices (8360, etc.).
   5
   6  * Copyright (C) 2006. Freescale Semiconductor, Inc. All rights reserved.
   7  *
   8  * Authors:     Shlomi Gridish <gridish@freescale.com>
   9  *              Li Yang <leoli@freescale.com>
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  */
  16 #ifndef _ASM_POWERPC_IMMAP_QE_H
  17 #define _ASM_POWERPC_IMMAP_QE_H
  18 #ifdef __KERNEL__
  19
  20 #include <linux/kernel.h>
  21 #include <asm/io.h>
  22
  23 #define QE_IMMAP_SIZE   (1024 * 1024)   /* 1MB from 1MB+IMMR */
  24
  25 /* QE I-RAM */
  26 struct qe_iram {
  27         __be32  iadd;           /* I-RAM Address Register */
  28         __be32  idata;          /* I-RAM Data Register */
  29         u8      res0[0x04];
  30         __be32  iready;         /* I-RAM Ready Register */
  31         u8      res1[0x70];
  32 } __attribute__ ((packed));
  33
  34 /* QE Interrupt Controller */
  35 struct qe_ic_regs {
  36         __be32  qicr;
  37         __be32  qivec;
  38         __be32  qripnr;
  39         __be32  qipnr;
  40         __be32  qipxcc;
  41         __be32  qipycc;
  42         __be32  qipwcc;
  43         __be32  qipzcc;
  44         __be32  qimr;
  45         __be32  qrimr;
  46         __be32  qicnr;
  47         u8      res0[0x4];
  48         __be32  qiprta;
  49         __be32  qiprtb;
  50         u8      res1[0x4];
  51         __be32  qricr;
  52         u8      res2[0x20];
  53         __be32  qhivec;
  54         u8      res3[0x1C];
  55 } __attribute__ ((packed));
  56
  57 /* Communications Processor */
  58 struct cp_qe {
  59         __be32  cecr;           /* QE command register */
  60         __be32  ceccr;          /* QE controller configuration register */
  61         __be32  cecdr;          /* QE command data register */
  62         u8      res0[0xA];
  63         __be16  ceter;          /* QE timer event register */
  64         u8      res1[0x2];
  65         __be16  cetmr;          /* QE timers mask register */
  66         __be32  cetscr;         /* QE time-stamp timer control register */
  67         __be32  cetsr1;         /* QE time-stamp register 1 */
  68         __be32  cetsr2;         /* QE time-stamp register 2 */
  69         u8      res2[0x8];
  70         __be32  cevter;         /* QE virtual tasks event register */
  71         __be32  cevtmr;         /* QE virtual tasks mask register */
  72         __be16  cercr;          /* QE RAM control register */
  73         u8      res3[0x2];
  74         u8      res4[0x24];
  75         __be16  ceexe1;         /* QE external request 1 event register */
  76         u8      res5[0x2];
  77         __be16  ceexm1;         /* QE external request 1 mask register */
  78         u8      res6[0x2];
  79         __be16  ceexe2;         /* QE external request 2 event register */
  80         u8      res7[0x2];
  81         __be16  ceexm2;         /* QE external request 2 mask register */
  82         u8      res8[0x2];
  83         __be16  ceexe3;         /* QE external request 3 event register */
  84         u8      res9[0x2];
  85         __be16  ceexm3;         /* QE external request 3 mask register */
  86         u8      res10[0x2];
  87         __be16  ceexe4;         /* QE external request 4 event register */
  88         u8      res11[0x2];
  89         __be16  ceexm4;         /* QE external request 4 mask register */
  90         u8      res12[0x3A];
  91         __be32  ceurnr;         /* QE microcode revision number register */
  92         u8      res13[0x244];
  93 } __attribute__ ((packed));
  94
  95 /* QE Multiplexer */
  96 struct qe_mux {
  97         __be32  cmxgcr;         /* CMX general clock route register */
  98         __be32  cmxsi1cr_l;     /* CMX SI1 clock route low register */
  99         __be32  cmxsi1cr_h;     /* CMX SI1 clock route high register */
 100         __be32  cmxsi1syr;      /* CMX SI1 SYNC route register */
 101         __be32  cmxucr[4];      /* CMX UCCx clock route registers */
 102         __be32  cmxupcr;        /* CMX UPC clock route register */
 103         u8      res0[0x1C];
 104 } __attribute__ ((packed));
 105
 106 /* QE Timers */
 107 struct qe_timers {
 108         u8      gtcfr1;         /* Timer 1 and Timer 2 global config register*/
 109         u8      res0[0x3];
 110         u8      gtcfr2;         /* Timer 3 and timer 4 global config register*/
 111         u8      res1[0xB];
 112         __be16  gtmdr1;         /* Timer 1 mode register */
 113         __be16  gtmdr2;         /* Timer 2 mode register */
 114         __be16  gtrfr1;         /* Timer 1 reference register */
 115         __be16  gtrfr2;         /* Timer 2 reference register */
 116         __be16  gtcpr1;         /* Timer 1 capture register */
 117         __be16  gtcpr2;         /* Timer 2 capture register */
 118         __be16  gtcnr1;         /* Timer 1 counter */
 119         __be16  gtcnr2;         /* Timer 2 counter */
 120         __be16  gtmdr3;         /* Timer 3 mode register */
 121         __be16  gtmdr4;         /* Timer 4 mode register */
 122         __be16  gtrfr3;         /* Timer 3 reference register */
 123         __be16  gtrfr4;         /* Timer 4 reference register */
 124         __be16  gtcpr3;         /* Timer 3 capture register */
 125         __be16  gtcpr4;         /* Timer 4 capture register */
 126         __be16  gtcnr3;         /* Timer 3 counter */
 127         __be16  gtcnr4;         /* Timer 4 counter */
 128         __be16  gtevr1;         /* Timer 1 event register */
 129         __be16  gtevr2;         /* Timer 2 event register */
 130         __be16  gtevr3;         /* Timer 3 event register */
 131         __be16  gtevr4;         /* Timer 4 event register */
 132         __be16  gtps;           /* Timer 1 prescale register */
 133         u8 res2[0x46];
 134 } __attribute__ ((packed));
 135
 136 /* BRG */
 137 struct qe_brg {
 138         __be32  brgc[16];       /* BRG configuration registers */
 139         u8      res0[0x40];
 140 } __attribute__ ((packed));
 141
 142 /* SPI */
 143 struct spi {
 144         u8      res0[0x20];
 145         __be32  spmode;         /* SPI mode register */
 146         u8      res1[0x2];
 147         u8      spie;           /* SPI event register */
 148         u8      res2[0x1];
 149         u8      res3[0x2];
 150         u8      spim;           /* SPI mask register */
 151         u8      res4[0x1];
 152         u8      res5[0x1];
 153         u8      spcom;          /* SPI command register */
 154         u8      res6[0x2];
 155         __be32  spitd;          /* SPI transmit data register (cpu mode) */
 156         __be32  spird;          /* SPI receive data register (cpu mode) */
 157         u8      res7[0x8];
 158 } __attribute__ ((packed));
 159
 160 /* SI */
 161 struct si1 {
 162         __be16  siamr1;         /* SI1 TDMA mode register */
 163         __be16  sibmr1;         /* SI1 TDMB mode register */
 164         __be16  sicmr1;         /* SI1 TDMC mode register */
 165         __be16  sidmr1;         /* SI1 TDMD mode register */
 166         u8      siglmr1_h;      /* SI1 global mode register high */
 167         u8      res0[0x1];
 168         u8      sicmdr1_h;      /* SI1 command register high */
 169         u8      res2[0x1];
 170         u8      sistr1_h;       /* SI1 status register high */
 171         u8      res3[0x1];
 172         __be16  sirsr1_h;       /* SI1 RAM shadow address register high */
 173         u8      sitarc1;        /* SI1 RAM counter Tx TDMA */
 174         u8      sitbrc1;        /* SI1 RAM counter Tx TDMB */
 175         u8      sitcrc1;        /* SI1 RAM counter Tx TDMC */
 176         u8      sitdrc1;        /* SI1 RAM counter Tx TDMD */
 177         u8      sirarc1;        /* SI1 RAM counter Rx TDMA */
 178         u8      sirbrc1;        /* SI1 RAM counter Rx TDMB */
 179         u8      sircrc1;        /* SI1 RAM counter Rx TDMC */
 180         u8      sirdrc1;        /* SI1 RAM counter Rx TDMD */
 181         u8      res4[0x8];
 182         __be16  siemr1;         /* SI1 TDME mode register 16 bits */
 183         __be16  sifmr1;         /* SI1 TDMF mode register 16 bits */
 184         __be16  sigmr1;         /* SI1 TDMG mode register 16 bits */
 185         __be16  sihmr1;         /* SI1 TDMH mode register 16 bits */
 186         u8      siglmg1_l;      /* SI1 global mode register low 8 bits */
 187         u8      res5[0x1];
 188         u8      sicmdr1_l;      /* SI1 command register low 8 bits */
 189         u8      res6[0x1];
 190         u8      sistr1_l;       /* SI1 status register low 8 bits */
 191         u8      res7[0x1];
 192         __be16  sirsr1_l;       /* SI1 RAM shadow address register low 16 bits*/
 193         u8      siterc1;        /* SI1 RAM counter Tx TDME 8 bits */
 194         u8      sitfrc1;        /* SI1 RAM counter Tx TDMF 8 bits */
 195         u8      sitgrc1;        /* SI1 RAM counter Tx TDMG 8 bits */
 196         u8      sithrc1;        /* SI1 RAM counter Tx TDMH 8 bits */
 197         u8      sirerc1;        /* SI1 RAM counter Rx TDME 8 bits */
 198         u8      sirfrc1;        /* SI1 RAM counter Rx TDMF 8 bits */
 199         u8      sirgrc1;        /* SI1 RAM counter Rx TDMG 8 bits */
 200         u8      sirhrc1;        /* SI1 RAM counter Rx TDMH 8 bits */
 201         u8      res8[0x8];
 202         __be32  siml1;          /* SI1 multiframe limit register */
 203         u8      siedm1;         /* SI1 extended diagnostic mode register */
 204         u8      res9[0xBB];
 205 } __attribute__ ((packed));
 206
 207 /* SI Routing Tables */
 208 struct sir {
 209         u8      tx[0x400];
 210         u8      rx[0x400];
 211         u8      res0[0x800];
 212 } __attribute__ ((packed));
 213
 214 /* USB Controller */
 215 struct qe_usb_ctlr {
 216         u8      usb_usmod;
 217         u8      usb_usadr;
 218         u8      usb_uscom;
 219         u8      res1[1];
 220         __be16  usb_usep[4];
 221         u8      res2[4];
 222         __be16  usb_usber;
 223         u8      res3[2];
 224         __be16  usb_usbmr;
 225         u8      res4[1];
 226         u8      usb_usbs;
 227         __be16  usb_ussft;
 228         u8      res5[2];
 229         __be16  usb_usfrn;
 230         u8      res6[0x22];
 231 } __attribute__ ((packed));
 232
 233 /* MCC */
 234 struct qe_mcc {
 235         __be32  mcce;           /* MCC event register */
 236         __be32  mccm;           /* MCC mask register */
 237         __be32  mccf;           /* MCC configuration register */
 238         __be32  merl;           /* MCC emergency request level register */
 239         u8      res0[0xF0];
 240 } __attribute__ ((packed));
 241
 242 /* QE UCC Slow */
 243 struct ucc_slow {
 244         __be32  gumr_l;         /* UCCx general mode register (low) */
 245         __be32  gumr_h;         /* UCCx general mode register (high) */
 246         __be16  upsmr;          /* UCCx protocol-specific mode register */
 247         u8      res0[0x2];
 248         __be16  utodr;          /* UCCx transmit on demand register */
 249         __be16  udsr;           /* UCCx data synchronization register */
 250         __be16  ucce;           /* UCCx event register */
 251         u8      res1[0x2];
 252         __be16  uccm;           /* UCCx mask register */
 253         u8      res2[0x1];
 254         u8      uccs;           /* UCCx status register */
 255         u8      res3[0x24];
 256         __be16  utpt;
 257         u8      res4[0x52];
 258         u8      guemr;          /* UCC general extended mode register */
 259 } __attribute__ ((packed));
 260
 261 /* QE UCC Fast */
 262 struct ucc_fast {
 263         __be32  gumr;           /* UCCx general mode register */
 264         __be32  upsmr;          /* UCCx protocol-specific mode register */
 265         __be16  utodr;          /* UCCx transmit on demand register */
 266         u8      res0[0x2];
 267         __be16  udsr;           /* UCCx data synchronization register */
 268         u8      res1[0x2];
 269         __be32  ucce;           /* UCCx event register */
 270         __be32  uccm;           /* UCCx mask register */
 271         u8      uccs;           /* UCCx status register */
 272         u8      res2[0x7];
 273         __be32  urfb;           /* UCC receive FIFO base */
 274         __be16  urfs;           /* UCC receive FIFO size */
 275         u8      res3[0x2];
 276         __be16  urfet;          /* UCC receive FIFO emergency threshold */
 277         __be16  urfset;         /* UCC receive FIFO special emergency
 278                                    threshold */
 279         __be32  utfb;           /* UCC transmit FIFO base */
 280         __be16  utfs;           /* UCC transmit FIFO size */
 281         u8      res4[0x2];
 282         __be16  utfet;          /* UCC transmit FIFO emergency threshold */
 283         u8      res5[0x2];
 284         __be16  utftt;          /* UCC transmit FIFO transmit threshold */
 285         u8      res6[0x2];
 286         __be16  utpt;           /* UCC transmit polling timer */
 287         u8      res7[0x2];
 288         __be32  urtry;          /* UCC retry counter register */
 289         u8      res8[0x4C];
 290         u8      guemr;          /* UCC general extended mode register */
 291 } __attribute__ ((packed));
 292
 293 struct ucc {
 294         union {
 295                 struct  ucc_slow slow;
 296                 struct  ucc_fast fast;
 297                 u8      res[0x200];     /* UCC blocks are 512 bytes each */
 298         };
 299 } __attribute__ ((packed));
 300
 301 /* MultiPHY UTOPIA POS Controllers (UPC) */
 302 struct upc {
 303         __be32  upgcr;          /* UTOPIA/POS general configuration register */
 304         __be32  uplpa;          /* UTOPIA/POS last PHY address */
 305         __be32  uphec;          /* ATM HEC register */
 306         __be32  upuc;           /* UTOPIA/POS UCC configuration */
 307         __be32  updc1;          /* UTOPIA/POS device 1 configuration */
 308         __be32  updc2;          /* UTOPIA/POS device 2 configuration */
 309         __be32  updc3;          /* UTOPIA/POS device 3 configuration */
 310         __be32  updc4;          /* UTOPIA/POS device 4 configuration */
 311         __be32  upstpa;         /* UTOPIA/POS STPA threshold */
 312         u8      res0[0xC];
 313         __be32  updrs1_h;       /* UTOPIA/POS device 1 rate select */
 314         __be32  updrs1_l;       /* UTOPIA/POS device 1 rate select */
 315         __be32  updrs2_h;       /* UTOPIA/POS device 2 rate select */
 316         __be32  updrs2_l;       /* UTOPIA/POS device 2 rate select */
 317         __be32  updrs3_h;       /* UTOPIA/POS device 3 rate select */
 318         __be32  updrs3_l;       /* UTOPIA/POS device 3 rate select */
 319         __be32  updrs4_h;       /* UTOPIA/POS device 4 rate select */
 320         __be32  updrs4_l;       /* UTOPIA/POS device 4 rate select */
 321         __be32  updrp1;         /* UTOPIA/POS device 1 receive priority low */
 322         __be32  updrp2;         /* UTOPIA/POS device 2 receive priority low */
 323         __be32  updrp3;         /* UTOPIA/POS device 3 receive priority low */
 324         __be32  updrp4;         /* UTOPIA/POS device 4 receive priority low */
 325         __be32  upde1;          /* UTOPIA/POS device 1 event */
 326         __be32  upde2;          /* UTOPIA/POS device 2 event */
 327         __be32  upde3;          /* UTOPIA/POS device 3 event */
 328         __be32  upde4;          /* UTOPIA/POS device 4 event */
 329         __be16  uprp1;
 330         __be16  uprp2;
 331         __be16  uprp3;
 332         __be16  uprp4;
 333         u8      res1[0x8];
 334         __be16  uptirr1_0;      /* Device 1 transmit internal rate 0 */
 335         __be16  uptirr1_1;      /* Device 1 transmit internal rate 1 */
 336         __be16  uptirr1_2;      /* Device 1 transmit internal rate 2 */
 337         __be16  uptirr1_3;      /* Device 1 transmit internal rate 3 */
 338         __be16  uptirr2_0;      /* Device 2 transmit internal rate 0 */
 339         __be16  uptirr2_1;      /* Device 2 transmit internal rate 1 */
 340         __be16  uptirr2_2;      /* Device 2 transmit internal rate 2 */
 341         __be16  uptirr2_3;      /* Device 2 transmit internal rate 3 */
 342         __be16  uptirr3_0;      /* Device 3 transmit internal rate 0 */
 343         __be16  uptirr3_1;      /* Device 3 transmit internal rate 1 */
 344         __be16  uptirr3_2;      /* Device 3 transmit internal rate 2 */
 345         __be16  uptirr3_3;      /* Device 3 transmit internal rate 3 */
 346         __be16  uptirr4_0;      /* Device 4 transmit internal rate 0 */
 347         __be16  uptirr4_1;      /* Device 4 transmit internal rate 1 */
 348         __be16  uptirr4_2;      /* Device 4 transmit internal rate 2 */
 349         __be16  uptirr4_3;      /* Device 4 transmit internal rate 3 */
 350         __be32  uper1;          /* Device 1 port enable register */
 351         __be32  uper2;          /* Device 2 port enable register */
 352         __be32  uper3;          /* Device 3 port enable register */
 353         __be32  uper4;          /* Device 4 port enable register */
 354         u8      res2[0x150];
 355 } __attribute__ ((packed));
 356
 357 /* SDMA */
 358 struct sdma {
 359         __be32  sdsr;           /* Serial DMA status register */
 360         __be32  sdmr;           /* Serial DMA mode register */
 361         __be32  sdtr1;          /* SDMA system bus threshold register */
 362         __be32  sdtr2;          /* SDMA secondary bus threshold register */
 363         __be32  sdhy1;          /* SDMA system bus hysteresis register */
 364         __be32  sdhy2;          /* SDMA secondary bus hysteresis register */
 365         __be32  sdta1;          /* SDMA system bus address register */
 366         __be32  sdta2;          /* SDMA secondary bus address register */
 367         __be32  sdtm1;          /* SDMA system bus MSNUM register */
 368         __be32  sdtm2;          /* SDMA secondary bus MSNUM register */
 369         u8      res0[0x10];
 370         __be32  sdaqr;          /* SDMA address bus qualify register */
 371         __be32  sdaqmr;         /* SDMA address bus qualify mask register */
 372         u8      res1[0x4];
 373         __be32  sdebcr;         /* SDMA CAM entries base register */
 374         u8      res2[0x38];
 375 } __attribute__ ((packed));
 376
 377 /* Debug Space */
 378 struct dbg {
 379         __be32  bpdcr;          /* Breakpoint debug command register */
 380         __be32  bpdsr;          /* Breakpoint debug status register */
 381         __be32  bpdmr;          /* Breakpoint debug mask register */
 382         __be32  bprmrr0;        /* Breakpoint request mode risc register 0 */
 383         __be32  bprmrr1;        /* Breakpoint request mode risc register 1 */
 384         u8      res0[0x8];
 385         __be32  bprmtr0;        /* Breakpoint request mode trb register 0 */
 386         __be32  bprmtr1;        /* Breakpoint request mode trb register 1 */
 387         u8      res1[0x8];
 388         __be32  bprmir;         /* Breakpoint request mode immediate register */
 389         __be32  bprmsr;         /* Breakpoint request mode serial register */
 390         __be32  bpemr;          /* Breakpoint exit mode register */
 391         u8      res2[0x48];
 392 } __attribute__ ((packed));
 393
 394 /*
 395  * RISC Special Registers (Trap and Breakpoint).  These are described in
 396  * the QE Developer's Handbook.
 397  */
 398 struct rsp {
 399         __be32 tibcr[16];       /* Trap/instruction breakpoint control regs */
 400         u8 res0[64];
 401         __be32 ibcr0;
 402         __be32 ibs0;
 403         __be32 ibcnr0;
 404         u8 res1[4];
 405         __be32 ibcr1;
 406         __be32 ibs1;
 407         __be32 ibcnr1;
 408         __be32 npcr;
 409         __be32 dbcr;
 410         __be32 dbar;
 411         __be32 dbamr;
 412         __be32 dbsr;
 413         __be32 dbcnr;
 414         u8 res2[12];
 415         __be32 dbdr_h;
 416         __be32 dbdr_l;
 417         __be32 dbdmr_h;
 418         __be32 dbdmr_l;
 419         __be32 bsr;
 420         __be32 bor;
 421         __be32 bior;
 422         u8 res3[4];
 423         __be32 iatr[4];
 424         __be32 eccr;            /* Exception control configuration register */
 425         __be32 eicr;
 426         u8 res4[0x100-0xf8];
 427 } __attribute__ ((packed));
 428
 429 struct qe_immap {
 430         struct qe_iram          iram;           /* I-RAM */
 431         struct qe_ic_regs       ic;             /* Interrupt Controller */
 432         struct cp_qe            cp;             /* Communications Processor */
 433         struct qe_mux           qmx;            /* QE Multiplexer */
 434         struct qe_timers        qet;            /* QE Timers */
 435         struct spi              spi[0x2];       /* spi */
 436         struct qe_mcc           mcc;            /* mcc */
 437         struct qe_brg           brg;            /* brg */
 438         struct qe_usb_ctlr      usb;            /* USB */
 439         struct si1              si1;            /* SI */
 440         u8                      res11[0x800];
 441         struct sir              sir;            /* SI Routing Tables */
 442         struct ucc              ucc1;           /* ucc1 */
 443         struct ucc              ucc3;           /* ucc3 */
 444         struct ucc              ucc5;           /* ucc5 */
 445         struct ucc              ucc7;           /* ucc7 */
 446         u8                      res12[0x600];
 447         struct upc              upc1;           /* MultiPHY UTOPIA POS Ctrlr 1*/
 448         struct ucc              ucc2;           /* ucc2 */
 449         struct ucc              ucc4;           /* ucc4 */
 450         struct ucc              ucc6;           /* ucc6 */
 451         struct ucc              ucc8;           /* ucc8 */
 452         u8                      res13[0x600];
 453         struct upc              upc2;           /* MultiPHY UTOPIA POS Ctrlr 2*/
 454         struct sdma             sdma;           /* SDMA */
 455         struct dbg              dbg;            /* 0x104080 - 0x1040FF
 456                                                    Debug Space */
 457         struct rsp              rsp[0x2];       /* 0x104100 - 0x1042FF
 458                                                    RISC Special Registers
 459                                                    (Trap and Breakpoint) */
 460         u8                      res14[0x300];   /* 0x104300 - 0x1045FF */
 461         u8                      res15[0x3A00];  /* 0x104600 - 0x107FFF */
 462         u8                      res16[0x8000];  /* 0x108000 - 0x110000 */
 463         u8                      muram[0xC000];  /* 0x110000 - 0x11C000
 464                                                    Multi-user RAM */
 465         u8                      res17[0x24000]; /* 0x11C000 - 0x140000 */
 466         u8                      res18[0xC0000]; /* 0x140000 - 0x200000 */
 467 } __attribute__ ((packed));
 468
 469 extern struct qe_immap __iomem *qe_immr;
 470 extern phys_addr_t get_qe_base(void);
 471
 472 /*
 473  * Returns the offset within the QE address space of the given pointer.
 474  *
 475  * Note that the QE does not support 36-bit physical addresses, so if
 476  * get_qe_base() returns a number above 4GB, the caller will probably fail.
 477  */
 478 static inline phys_addr_t immrbar_virt_to_phys(void *address)
 479 {
 480         void *q = (void *)qe_immr;
 481
 482         /* Is it a MURAM address? */
 483         if ((address >= q) && (address < (q + QE_IMMAP_SIZE)))
 484                 return get_qe_base() + (address - q);
 485
 486         /* It's an address returned by kmalloc */
 487         return virt_to_phys(address);
 488 }
 489
 490 #endif /* __KERNEL__ */
 491 #endif /* _ASM_POWERPC_IMMAP_QE_H */