hw/openpic.c

   1 /*
   2  * OpenPIC emulation
   3  *
   4  * Copyright (c) 2004 Jocelyn Mayer
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 /*
  25  *
  26  * Based on OpenPic implementations:
  27  * - Intel GW80314 I/O companion chip developer's manual
  28  * - Motorola MPC8245 & MPC8540 user manuals.
  29  * - Motorola MCP750 (aka Raven) programmer manual.
  30  * - Motorola Harrier programmer manuel
  31  *
  32  * Serial interrupts, as implemented in Raven chipset are not supported yet.
  33  *
  34  */
  35 #include "hw.h"
  36 #include "ppc_mac.h"
  37 #include "pci.h"
  38 #include "openpic.h"
  39
  40 //#define DEBUG_OPENPIC
  41
  42 #ifdef DEBUG_OPENPIC
  43 #define DPRINTF(fmt, ...) do { printf(fmt , ## __VA_ARGS__); } while (0)
  44 #else
  45 #define DPRINTF(fmt, ...) do { } while (0)
  46 #endif
  47
  48 #define USE_MPCxxx /* Intel model is broken, for now */
  49
  50 #if defined (USE_INTEL_GW80314)
  51 /* Intel GW80314 I/O Companion chip */
  52
  53 #define MAX_CPU     4
  54 #define MAX_IRQ    32
  55 #define MAX_DBL     4
  56 #define MAX_MBX     4
  57 #define MAX_TMR     4
  58 #define VECTOR_BITS 8
  59 #define MAX_IPI     0
  60
  61 #define VID (0x00000000)
  62
  63 #elif defined(USE_MPCxxx)
  64
  65 #define MAX_CPU     2
  66 #define MAX_IRQ   128
  67 #define MAX_DBL     0
  68 #define MAX_MBX     0
  69 #define MAX_TMR     4
  70 #define VECTOR_BITS 8
  71 #define MAX_IPI     4
  72 #define VID         0x03 /* MPIC version ID */
  73 #define VENI        0x00000000 /* Vendor ID */
  74
  75 enum {
  76     IRQ_IPVP = 0,
  77     IRQ_IDE,
  78 };
  79
  80 /* OpenPIC */
  81 #define OPENPIC_MAX_CPU      2
  82 #define OPENPIC_MAX_IRQ     64
  83 #define OPENPIC_EXT_IRQ     48
  84 #define OPENPIC_MAX_TMR      MAX_TMR
  85 #define OPENPIC_MAX_IPI      MAX_IPI
  86
  87 /* Interrupt definitions */
  88 #define OPENPIC_IRQ_FE     (OPENPIC_EXT_IRQ)     /* Internal functional IRQ */
  89 #define OPENPIC_IRQ_ERR    (OPENPIC_EXT_IRQ + 1) /* Error IRQ */
  90 #define OPENPIC_IRQ_TIM0   (OPENPIC_EXT_IRQ + 2) /* First timer IRQ */
  91 #if OPENPIC_MAX_IPI > 0
  92 #define OPENPIC_IRQ_IPI0   (OPENPIC_IRQ_TIM0 + OPENPIC_MAX_TMR) /* First IPI IRQ */
  93 #define OPENPIC_IRQ_DBL0   (OPENPIC_IRQ_IPI0 + (OPENPIC_MAX_CPU * OPENPIC_MAX_IPI)) /* First doorbell IRQ */
  94 #else
  95 #define OPENPIC_IRQ_DBL0   (OPENPIC_IRQ_TIM0 + OPENPIC_MAX_TMR) /* First doorbell IRQ */
  96 #define OPENPIC_IRQ_MBX0   (OPENPIC_IRQ_DBL0 + OPENPIC_MAX_DBL) /* First mailbox IRQ */
  97 #endif
  98
  99 /* MPIC */
 100 #define MPIC_MAX_CPU      1
 101 #define MPIC_MAX_EXT     12
 102 #define MPIC_MAX_INT     64
 103 #define MPIC_MAX_MSG      4
 104 #define MPIC_MAX_MSI      8
 105 #define MPIC_MAX_TMR      MAX_TMR
 106 #define MPIC_MAX_IPI      MAX_IPI
 107 #define MPIC_MAX_IRQ     (MPIC_MAX_EXT + MPIC_MAX_INT + MPIC_MAX_TMR + MPIC_MAX_MSG + MPIC_MAX_MSI + (MPIC_MAX_IPI * MPIC_MAX_CPU))
 108
 109 /* Interrupt definitions */
 110 #define MPIC_EXT_IRQ      0
 111 #define MPIC_INT_IRQ      (MPIC_EXT_IRQ + MPIC_MAX_EXT)
 112 #define MPIC_TMR_IRQ      (MPIC_INT_IRQ + MPIC_MAX_INT)
 113 #define MPIC_MSG_IRQ      (MPIC_TMR_IRQ + MPIC_MAX_TMR)
 114 #define MPIC_MSI_IRQ      (MPIC_MSG_IRQ + MPIC_MAX_MSG)
 115 #define MPIC_IPI_IRQ      (MPIC_MSI_IRQ + MPIC_MAX_MSI)
 116
 117 #define MPIC_GLB_REG_START        0x0
 118 #define MPIC_GLB_REG_SIZE         0x10F0
 119 #define MPIC_TMR_REG_START        0x10F0
 120 #define MPIC_TMR_REG_SIZE         0x220
 121 #define MPIC_EXT_REG_START        0x10000
 122 #define MPIC_EXT_REG_SIZE         0x180
 123 #define MPIC_INT_REG_START        0x10200
 124 #define MPIC_INT_REG_SIZE         0x800
 125 #define MPIC_MSG_REG_START        0x11600
 126 #define MPIC_MSG_REG_SIZE         0x100
 127 #define MPIC_MSI_REG_START        0x11C00
 128 #define MPIC_MSI_REG_SIZE         0x100
 129 #define MPIC_CPU_REG_START        0x20000
 130 #define MPIC_CPU_REG_SIZE         0x100
 131
 132 enum mpic_ide_bits {
 133     IDR_EP     = 0,
 134     IDR_CI0     = 1,
 135     IDR_CI1     = 2,
 136     IDR_P1     = 30,
 137     IDR_P0     = 31,
 138 };
 139
 140 #else
 141 #error "Please select which OpenPic implementation is to be emulated"
 142 #endif
 143
 144 #define BF_WIDTH(_bits_) \
 145 (((_bits_) + (sizeof(uint32_t) * 8) - 1) / (sizeof(uint32_t) * 8))
 146
 147 static inline void set_bit (uint32_t *field, int bit)
 148 {
 149     field[bit >> 5] |= 1 << (bit & 0x1F);
 150 }
 151
 152 static inline void reset_bit (uint32_t *field, int bit)
 153 {
 154     field[bit >> 5] &= ~(1 << (bit & 0x1F));
 155 }
 156
 157 static inline int test_bit (uint32_t *field, int bit)
 158 {
 159     return (field[bit >> 5] & 1 << (bit & 0x1F)) != 0;
 160 }
 161
 162 enum {
 163     IRQ_EXTERNAL = 0x01,
 164     IRQ_INTERNAL = 0x02,
 165     IRQ_TIMER    = 0x04,
 166     IRQ_SPECIAL  = 0x08,
 167 };
 168
 169 typedef struct IRQ_queue_t {
 170     uint32_t queue[BF_WIDTH(MAX_IRQ)];
 171     int next;
 172     int priority;
 173 } IRQ_queue_t;
 174
 175 typedef struct IRQ_src_t {
 176     uint32_t ipvp;  /* IRQ vector/priority register */
 177     uint32_t ide;   /* IRQ destination register */
 178     int type;
 179     int last_cpu;
 180     int pending;    /* TRUE if IRQ is pending */
 181 } IRQ_src_t;
 182
 183 enum IPVP_bits {
 184     IPVP_MASK     = 31,
 185     IPVP_ACTIVITY = 30,
 186     IPVP_MODE     = 29,
 187     IPVP_POLARITY = 23,
 188     IPVP_SENSE    = 22,
 189 };
 190 #define IPVP_PRIORITY_MASK     (0x1F << 16)
 191 #define IPVP_PRIORITY(_ipvpr_) ((int)(((_ipvpr_) & IPVP_PRIORITY_MASK) >> 16))
 192 #define IPVP_VECTOR_MASK       ((1 << VECTOR_BITS) - 1)
 193 #define IPVP_VECTOR(_ipvpr_)   ((_ipvpr_) & IPVP_VECTOR_MASK)
 194
 195 typedef struct IRQ_dst_t {
 196     uint32_t tfrr;
 197     uint32_t pctp; /* CPU current task priority */
 198     uint32_t pcsr; /* CPU sensitivity register */
 199     IRQ_queue_t raised;
 200     IRQ_queue_t servicing;
 201     qemu_irq *irqs;
 202 } IRQ_dst_t;
 203
 204 typedef struct openpic_t {
 205     PCIDevice pci_dev;
 206     int mem_index;
 207     /* Global registers */
 208     uint32_t frep; /* Feature reporting register */
 209     uint32_t glbc; /* Global configuration register  */
 210     uint32_t micr; /* MPIC interrupt configuration register */
 211     uint32_t veni; /* Vendor identification register */
 212     uint32_t pint; /* Processor initialization register */
 213     uint32_t spve; /* Spurious vector register */
 214     uint32_t tifr; /* Timer frequency reporting register */
 215     /* Source registers */
 216     IRQ_src_t src[MAX_IRQ];
 217     /* Local registers per output pin */
 218     IRQ_dst_t dst[MAX_CPU];
 219     int nb_cpus;
 220     /* Timer registers */
 221     struct {
 222         uint32_t ticc;  /* Global timer current count register */
 223         uint32_t tibc;  /* Global timer base count register */
 224     } timers[MAX_TMR];
 225 #if MAX_DBL > 0
 226     /* Doorbell registers */
 227     uint32_t dar;        /* Doorbell activate register */
 228     struct {
 229         uint32_t dmr;    /* Doorbell messaging register */
 230     } doorbells[MAX_DBL];
 231 #endif
 232 #if MAX_MBX > 0
 233     /* Mailbox registers */
 234     struct {
 235         uint32_t mbr;    /* Mailbox register */
 236     } mailboxes[MAX_MAILBOXES];
 237 #endif
 238     /* IRQ out is used when in bypass mode (not implemented) */
 239     qemu_irq irq_out;
 240     int max_irq;
 241     int irq_ipi0;
 242     int irq_tim0;
 243     int need_swap;
 244     void (*reset) (void *);
 245     void (*irq_raise) (struct openpic_t *, int, IRQ_src_t *);
 246 } openpic_t;
 247
 248 static inline uint32_t openpic_swap32(openpic_t *opp, uint32_t val)
 249 {
 250     if (opp->need_swap)
 251         return bswap32(val);
 252
 253     return val;
 254 }
 255
 256 static inline void IRQ_setbit (IRQ_queue_t *q, int n_IRQ)
 257 {
 258     set_bit(q->queue, n_IRQ);
 259 }
 260
 261 static inline void IRQ_resetbit (IRQ_queue_t *q, int n_IRQ)
 262 {
 263     reset_bit(q->queue, n_IRQ);
 264 }
 265
 266 static inline int IRQ_testbit (IRQ_queue_t *q, int n_IRQ)
 267 {
 268     return test_bit(q->queue, n_IRQ);
 269 }
 270
 271 static void IRQ_check (openpic_t *opp, IRQ_queue_t *q)
 272 {
 273     int next, i;
 274     int priority;
 275
 276     next = -1;
 277     priority = -1;
 278     for (i = 0; i < opp->max_irq; i++) {
 279         if (IRQ_testbit(q, i)) {
 280             DPRINTF("IRQ_check: irq %d set ipvp_pr=%d pr=%d\n",
 281                     i, IPVP_PRIORITY(opp->src[i].ipvp), priority);
 282             if (IPVP_PRIORITY(opp->src[i].ipvp) > priority) {
 283                 next = i;
 284                 priority = IPVP_PRIORITY(opp->src[i].ipvp);
 285             }
 286         }
 287     }
 288     q->next = next;
 289     q->priority = priority;
 290 }
 291
 292 static int IRQ_get_next (openpic_t *opp, IRQ_queue_t *q)
 293 {
 294     if (q->next == -1) {
 295         /* XXX: optimize */
 296         IRQ_check(opp, q);
 297     }
 298
 299     return q->next;
 300 }
 301
 302 static void IRQ_local_pipe (openpic_t *opp, int n_CPU, int n_IRQ)
 303 {
 304     IRQ_dst_t *dst;
 305     IRQ_src_t *src;
 306     int priority;
 307
 308     dst = &opp->dst[n_CPU];
 309     src = &opp->src[n_IRQ];
 310     priority = IPVP_PRIORITY(src->ipvp);
 311     if (priority <= dst->pctp) {
 312         /* Too low priority */
 313         DPRINTF("%s: IRQ %d has too low priority on CPU %d\n",
 314                 __func__, n_IRQ, n_CPU);
 315         return;
 316     }
 317     if (IRQ_testbit(&dst->raised, n_IRQ)) {
 318         /* Interrupt miss */
 319         DPRINTF("%s: IRQ %d was missed on CPU %d\n",
 320                 __func__, n_IRQ, n_CPU);
 321         return;
 322     }
 323     set_bit(&src->ipvp, IPVP_ACTIVITY);
 324     IRQ_setbit(&dst->raised, n_IRQ);
 325     if (priority < dst->raised.priority) {
 326         /* An higher priority IRQ is already raised */
 327         DPRINTF("%s: IRQ %d is hidden by raised IRQ %d on CPU %d\n",
 328                 __func__, n_IRQ, dst->raised.next, n_CPU);
 329         return;
 330     }
 331     IRQ_get_next(opp, &dst->raised);
 332     if (IRQ_get_next(opp, &dst->servicing) != -1 &&
 333         priority <= dst->servicing.priority) {
 334         DPRINTF("%s: IRQ %d is hidden by servicing IRQ %d on CPU %d\n",
 335                 __func__, n_IRQ, dst->servicing.next, n_CPU);
 336         /* Already servicing a higher priority IRQ */
 337         return;
 338     }
 339     DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n", n_CPU, n_IRQ);
 340     opp->irq_raise(opp, n_CPU, src);
 341 }
 342
 343 /* update pic state because registers for n_IRQ have changed value */
 344 static void openpic_update_irq(openpic_t *opp, int n_IRQ)
 345 {
 346     IRQ_src_t *src;
 347     int i;
 348
 349     src = &opp->src[n_IRQ];
 350
 351     if (!src->pending) {
 352         /* no irq pending */
 353         DPRINTF("%s: IRQ %d is not pending\n", __func__, n_IRQ);
 354         return;
 355     }
 356     if (test_bit(&src->ipvp, IPVP_MASK)) {
 357         /* Interrupt source is disabled */
 358         DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ);
 359         return;
 360     }
 361     if (IPVP_PRIORITY(src->ipvp) == 0) {
 362         /* Priority set to zero */
 363         DPRINTF("%s: IRQ %d has 0 priority\n", __func__, n_IRQ);
 364         return;
 365     }
 366     if (test_bit(&src->ipvp, IPVP_ACTIVITY)) {
 367         /* IRQ already active */
 368         DPRINTF("%s: IRQ %d is already active\n", __func__, n_IRQ);
 369         return;
 370     }
 371     if (src->ide == 0x00000000) {
 372         /* No target */
 373         DPRINTF("%s: IRQ %d has no target\n", __func__, n_IRQ);
 374         return;
 375     }
 376
 377     if (src->ide == (1 << src->last_cpu)) {
 378         /* Only one CPU is allowed to receive this IRQ */
 379         IRQ_local_pipe(opp, src->last_cpu, n_IRQ);
 380     } else if (!test_bit(&src->ipvp, IPVP_MODE)) {
 381         /* Directed delivery mode */
 382         for (i = 0; i < opp->nb_cpus; i++) {
 383             if (test_bit(&src->ide, i))
 384                 IRQ_local_pipe(opp, i, n_IRQ);
 385         }
 386     } else {
 387         /* Distributed delivery mode */
 388         for (i = src->last_cpu + 1; i != src->last_cpu; i++) {
 389             if (i == opp->nb_cpus)
 390                 i = 0;
 391             if (test_bit(&src->ide, i)) {
 392                 IRQ_local_pipe(opp, i, n_IRQ);
 393                 src->last_cpu = i;
 394                 break;
 395             }
 396         }
 397     }
 398 }
 399
 400 static void openpic_set_irq(void *opaque, int n_IRQ, int level)
 401 {
 402     openpic_t *opp = opaque;
 403     IRQ_src_t *src;
 404
 405     src = &opp->src[n_IRQ];
 406     DPRINTF("openpic: set irq %d = %d ipvp=%08x\n",
 407             n_IRQ, level, src->ipvp);
 408     if (test_bit(&src->ipvp, IPVP_SENSE)) {
 409         /* level-sensitive irq */
 410         src->pending = level;
 411         if (!level)
 412             reset_bit(&src->ipvp, IPVP_ACTIVITY);
 413     } else {
 414         /* edge-sensitive irq */
 415         if (level)
 416             src->pending = 1;
 417     }
 418     openpic_update_irq(opp, n_IRQ);
 419 }
 420
 421 static void openpic_reset (void *opaque)
 422 {
 423     openpic_t *opp = (openpic_t *)opaque;
 424     int i;
 425
 426     opp->glbc = 0x80000000;
 427     /* Initialise controller registers */
 428     opp->frep = ((OPENPIC_EXT_IRQ - 1) << 16) | ((MAX_CPU - 1) << 8) | VID;
 429     opp->veni = VENI;
 430     opp->pint = 0x00000000;
 431     opp->spve = 0x000000FF;
 432     opp->tifr = 0x003F7A00;
 433     /* ? */
 434     opp->micr = 0x00000000;
 435     /* Initialise IRQ sources */
 436     for (i = 0; i < opp->max_irq; i++) {
 437         opp->src[i].ipvp = 0xA0000000;
 438         opp->src[i].ide  = 0x00000000;
 439     }
 440     /* Initialise IRQ destinations */
 441     for (i = 0; i < MAX_CPU; i++) {
 442         opp->dst[i].pctp      = 0x0000000F;
 443         opp->dst[i].pcsr      = 0x00000000;
 444         memset(&opp->dst[i].raised, 0, sizeof(IRQ_queue_t));
 445         memset(&opp->dst[i].servicing, 0, sizeof(IRQ_queue_t));
 446     }
 447     /* Initialise timers */
 448     for (i = 0; i < MAX_TMR; i++) {
 449         opp->timers[i].ticc = 0x00000000;
 450         opp->timers[i].tibc = 0x80000000;
 451     }
 452     /* Initialise doorbells */
 453 #if MAX_DBL > 0
 454     opp->dar = 0x00000000;
 455     for (i = 0; i < MAX_DBL; i++) {
 456         opp->doorbells[i].dmr  = 0x00000000;
 457     }
 458 #endif
 459     /* Initialise mailboxes */
 460 #if MAX_MBX > 0
 461     for (i = 0; i < MAX_MBX; i++) { /* ? */
 462         opp->mailboxes[i].mbr   = 0x00000000;
 463     }
 464 #endif
 465     /* Go out of RESET state */
 466     opp->glbc = 0x00000000;
 467 }
 468
 469 static inline uint32_t read_IRQreg (openpic_t *opp, int n_IRQ, uint32_t reg)
 470 {
 471     uint32_t retval;
 472
 473     switch (reg) {
 474     case IRQ_IPVP:
 475         retval = opp->src[n_IRQ].ipvp;
 476         break;
 477     case IRQ_IDE:
 478         retval = opp->src[n_IRQ].ide;
 479         break;
 480     }
 481
 482     return retval;
 483 }
 484
 485 static inline void write_IRQreg (openpic_t *opp, int n_IRQ,
 486                                  uint32_t reg, uint32_t val)
 487 {
 488     uint32_t tmp;
 489
 490     switch (reg) {
 491     case IRQ_IPVP:
 492         /* NOTE: not fully accurate for special IRQs, but simple and
 493            sufficient */
 494         /* ACTIVITY bit is read-only */
 495         opp->src[n_IRQ].ipvp =
 496             (opp->src[n_IRQ].ipvp & 0x40000000) |
 497             (val & 0x800F00FF);
 498         openpic_update_irq(opp, n_IRQ);
 499         DPRINTF("Set IPVP %d to 0x%08x -> 0x%08x\n",
 500                 n_IRQ, val, opp->src[n_IRQ].ipvp);
 501         break;
 502     case IRQ_IDE:
 503         tmp = val & 0xC0000000;
 504         tmp |= val & ((1 << MAX_CPU) - 1);
 505         opp->src[n_IRQ].ide = tmp;
 506         DPRINTF("Set IDE %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].ide);
 507         break;
 508     }
 509 }
 510
 511 #if 0 // Code provision for Intel model
 512 #if MAX_DBL > 0
 513 static uint32_t read_doorbell_register (openpic_t *opp,
 514                                         int n_dbl, uint32_t offset)
 515 {
 516     uint32_t retval;
 517
 518     switch (offset) {
 519     case DBL_IPVP_OFFSET:
 520         retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP);
 521         break;
 522     case DBL_IDE_OFFSET:
 523         retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE);
 524         break;
 525     case DBL_DMR_OFFSET:
 526         retval = opp->doorbells[n_dbl].dmr;
 527         break;
 528     }
 529
 530     return retval;
 531 }
 532
 533 static void write_doorbell_register (penpic_t *opp, int n_dbl,
 534                                      uint32_t offset, uint32_t value)
 535 {
 536     switch (offset) {
 537     case DBL_IVPR_OFFSET:
 538         write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP, value);
 539         break;
 540     case DBL_IDE_OFFSET:
 541         write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE, value);
 542         break;
 543     case DBL_DMR_OFFSET:
 544         opp->doorbells[n_dbl].dmr = value;
 545         break;
 546     }
 547 }
 548 #endif
 549
 550 #if MAX_MBX > 0
 551 static uint32_t read_mailbox_register (openpic_t *opp,
 552                                        int n_mbx, uint32_t offset)
 553 {
 554     uint32_t retval;
 555
 556     switch (offset) {
 557     case MBX_MBR_OFFSET:
 558         retval = opp->mailboxes[n_mbx].mbr;
 559         break;
 560     case MBX_IVPR_OFFSET:
 561         retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP);
 562         break;
 563     case MBX_DMR_OFFSET:
 564         retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE);
 565         break;
 566     }
 567
 568     return retval;
 569 }
 570
 571 static void write_mailbox_register (openpic_t *opp, int n_mbx,
 572                                     uint32_t address, uint32_t value)
 573 {
 574     switch (offset) {
 575     case MBX_MBR_OFFSET:
 576         opp->mailboxes[n_mbx].mbr = value;
 577         break;
 578     case MBX_IVPR_OFFSET:
 579         write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP, value);
 580         break;
 581     case MBX_DMR_OFFSET:
 582         write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE, value);
 583         break;
 584     }
 585 }
 586 #endif
 587 #endif /* 0 : Code provision for Intel model */
 588
 589 static void openpic_gbl_write (void *opaque, target_phys_addr_t addr, uint32_t val)
 590 {
 591     openpic_t *opp = opaque;
 592     IRQ_dst_t *dst;
 593     int idx;
 594
 595     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
 596     if (addr & 0xF)
 597         return;
 598 #if defined TARGET_WORDS_BIGENDIAN
 599     val = openpic_swap32(opp, val);
 600 #endif
 601     addr &= 0xFF;
 602     switch (addr) {
 603     case 0x00: /* FREP */
 604         break;
 605     case 0x20: /* GLBC */
 606         if (val & 0x80000000 && opp->reset)
 607             opp->reset(opp);
 608         opp->glbc = val & ~0x80000000;
 609         break;
 610     case 0x80: /* VENI */
 611         break;
 612     case 0x90: /* PINT */
 613         for (idx = 0; idx < opp->nb_cpus; idx++) {
 614             if ((val & (1 << idx)) && !(opp->pint & (1 << idx))) {
 615                 DPRINTF("Raise OpenPIC RESET output for CPU %d\n", idx);
 616                 dst = &opp->dst[idx];
 617                 qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_RESET]);
 618             } else if (!(val & (1 << idx)) && (opp->pint & (1 << idx))) {
 619                 DPRINTF("Lower OpenPIC RESET output for CPU %d\n", idx);
 620                 dst = &opp->dst[idx];
 621                 qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_RESET]);
 622             }
 623         }
 624         opp->pint = val;
 625         break;
 626 #if MAX_IPI > 0
 627     case 0xA0: /* IPI_IPVP */
 628     case 0xB0:
 629     case 0xC0:
 630     case 0xD0:
 631         {
 632             int idx;
 633             idx = (addr - 0xA0) >> 4;
 634             write_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IPVP, val);
 635         }
 636         break;
 637 #endif
 638     case 0xE0: /* SPVE */
 639         opp->spve = val & 0x000000FF;
 640         break;
 641     case 0xF0: /* TIFR */
 642         opp->tifr = val;
 643         break;
 644     default:
 645         break;
 646     }
 647 }
 648
 649 static uint32_t openpic_gbl_read (void *opaque, target_phys_addr_t addr)
 650 {
 651     openpic_t *opp = opaque;
 652     uint32_t retval;
 653
 654     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
 655     retval = 0xFFFFFFFF;
 656     if (addr & 0xF)
 657         return retval;
 658     addr &= 0xFF;
 659     switch (addr) {
 660     case 0x00: /* FREP */
 661         retval = opp->frep;
 662         break;
 663     case 0x20: /* GLBC */
 664         retval = opp->glbc;
 665         break;
 666     case 0x80: /* VENI */
 667         retval = opp->veni;
 668         break;
 669     case 0x90: /* PINT */
 670         retval = 0x00000000;
 671         break;
 672 #if MAX_IPI > 0
 673     case 0xA0: /* IPI_IPVP */
 674     case 0xB0:
 675     case 0xC0:
 676     case 0xD0:
 677         {
 678             int idx;
 679             idx = (addr - 0xA0) >> 4;
 680             retval = read_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IPVP);
 681         }
 682         break;
 683 #endif
 684     case 0xE0: /* SPVE */
 685         retval = opp->spve;
 686         break;
 687     case 0xF0: /* TIFR */
 688         retval = opp->tifr;
 689         break;
 690     default:
 691         break;
 692     }
 693     DPRINTF("%s: => %08x\n", __func__, retval);
 694 #if defined TARGET_WORDS_BIGENDIAN
 695     retval = openpic_swap32(opp, retval);
 696 #endif
 697
 698     return retval;
 699 }
 700
 701 static void openpic_timer_write (void *opaque, uint32_t addr, uint32_t val)
 702 {
 703     openpic_t *opp = opaque;
 704     int idx;
 705
 706     DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
 707     if (addr & 0xF)
 708         return;
 709 #if defined TARGET_WORDS_BIGENDIAN
 710     val = openpic_swap32(opp, val);
 711 #endif
 712     addr -= 0x1100;
 713     addr &= 0xFFFF;
 714     idx = (addr & 0xFFF0) >> 6;
 715     addr = addr & 0x30;
 716     switch (addr) {
 717     case 0x00: /* TICC */
 718         break;
 719     case 0x10: /* TIBC */
 720         if ((opp->timers[idx].ticc & 0x80000000) != 0 &&
 721             (val & 0x80000000) == 0 &&
 722             (opp->timers[idx].tibc & 0x80000000) != 0)
 723             opp->timers[idx].ticc &= ~0x80000000;
 724         opp->timers[idx].tibc = val;
 725         break;
 726     case 0x20: /* TIVP */
 727         write_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IPVP, val);
 728         break;
 729     case 0x30: /* TIDE */
 730         write_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IDE, val);
 731         break;
 732     }
 733 }
 734
 735 static uint32_t openpic_timer_read (void *opaque, uint32_t addr)
 736 {
 737     openpic_t *opp = opaque;
 738     uint32_t retval;
 739     int idx;
 740
 741     DPRINTF("%s: addr %08x\n", __func__, addr);
 742     retval = 0xFFFFFFFF;
 743     if (addr & 0xF)
 744         return retval;
 745     addr -= 0x1100;
 746     addr &= 0xFFFF;
 747     idx = (addr & 0xFFF0) >> 6;
 748     addr = addr & 0x30;
 749     switch (addr) {
 750     case 0x00: /* TICC */
 751         retval = opp->timers[idx].ticc;
 752         break;
 753     case 0x10: /* TIBC */
 754         retval = opp->timers[idx].tibc;
 755         break;
 756     case 0x20: /* TIPV */
 757         retval = read_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IPVP);
 758         break;
 759     case 0x30: /* TIDE */
 760         retval = read_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IDE);
 761         break;
 762     }
 763     DPRINTF("%s: => %08x\n", __func__, retval);
 764 #if defined TARGET_WORDS_BIGENDIAN
 765     retval = openpic_swap32(opp, retval);
 766 #endif
 767
 768     return retval;
 769 }
 770
 771 static void openpic_src_write (void *opaque, uint32_t addr, uint32_t val)
 772 {
 773     openpic_t *opp = opaque;
 774     int idx;
 775
 776     DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
 777     if (addr & 0xF)
 778         return;
 779 #if defined TARGET_WORDS_BIGENDIAN
 780     val = openpic_swap32(opp, val);
 781 #endif
 782     addr = addr & 0xFFF0;
 783     idx = addr >> 5;
 784     if (addr & 0x10) {
 785         /* EXDE / IFEDE / IEEDE */
 786         write_IRQreg(opp, idx, IRQ_IDE, val);
 787     } else {
 788         /* EXVP / IFEVP / IEEVP */
 789         write_IRQreg(opp, idx, IRQ_IPVP, val);
 790     }
 791 }
 792
 793 static uint32_t openpic_src_read (void *opaque, uint32_t addr)
 794 {
 795     openpic_t *opp = opaque;
 796     uint32_t retval;
 797     int idx;
 798
 799     DPRINTF("%s: addr %08x\n", __func__, addr);
 800     retval = 0xFFFFFFFF;
 801     if (addr & 0xF)
 802         return retval;
 803     addr = addr & 0xFFF0;
 804     idx = addr >> 5;
 805     if (addr & 0x10) {
 806         /* EXDE / IFEDE / IEEDE */
 807         retval = read_IRQreg(opp, idx, IRQ_IDE);
 808     } else {
 809         /* EXVP / IFEVP / IEEVP */
 810         retval = read_IRQreg(opp, idx, IRQ_IPVP);
 811     }
 812     DPRINTF("%s: => %08x\n", __func__, retval);
 813 #if defined TARGET_WORDS_BIGENDIAN
 814     retval = openpic_swap32(opp, retval);
 815 #endif
 816
 817     return retval;
 818 }
 819
 820 static void openpic_cpu_write (void *opaque, target_phys_addr_t addr, uint32_t val)
 821 {
 822     openpic_t *opp = opaque;
 823     IRQ_src_t *src;
 824     IRQ_dst_t *dst;
 825     int idx, s_IRQ, n_IRQ;
 826
 827     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
 828     if (addr & 0xF)
 829         return;
 830 #if defined TARGET_WORDS_BIGENDIAN
 831     val = openpic_swap32(opp, val);
 832 #endif
 833     addr &= 0x1FFF0;
 834     idx = addr / 0x1000;
 835     dst = &opp->dst[idx];
 836     addr &= 0xFF0;
 837     switch (addr) {
 838 #if MAX_IPI > 0
 839     case 0x40: /* PIPD */
 840     case 0x50:
 841     case 0x60:
 842     case 0x70:
 843         idx = (addr - 0x40) >> 4;
 844         write_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IDE, val);
 845         openpic_set_irq(opp, opp->irq_ipi0 + idx, 1);
 846         openpic_set_irq(opp, opp->irq_ipi0 + idx, 0);
 847         break;
 848 #endif
 849     case 0x80: /* PCTP */
 850         dst->pctp = val & 0x0000000F;
 851         break;
 852     case 0x90: /* WHOAMI */
 853         /* Read-only register */
 854         break;
 855     case 0xA0: /* PIAC */
 856         /* Read-only register */
 857         break;
 858     case 0xB0: /* PEOI */
 859         DPRINTF("PEOI\n");
 860         s_IRQ = IRQ_get_next(opp, &dst->servicing);
 861         IRQ_resetbit(&dst->servicing, s_IRQ);
 862         dst->servicing.next = -1;
 863         /* Set up next servicing IRQ */
 864         s_IRQ = IRQ_get_next(opp, &dst->servicing);
 865         /* Check queued interrupts. */
 866         n_IRQ = IRQ_get_next(opp, &dst->raised);
 867         src = &opp->src[n_IRQ];
 868         if (n_IRQ != -1 &&
 869             (s_IRQ == -1 ||
 870              IPVP_PRIORITY(src->ipvp) > dst->servicing.priority)) {
 871             DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n",
 872                     idx, n_IRQ);
 873             opp->irq_raise(opp, idx, src);
 874         }
 875         break;
 876     default:
 877         break;
 878     }
 879 }
 880
 881 static uint32_t openpic_cpu_read (void *opaque, target_phys_addr_t addr)
 882 {
 883     openpic_t *opp = opaque;
 884     IRQ_src_t *src;
 885     IRQ_dst_t *dst;
 886     uint32_t retval;
 887     int idx, n_IRQ;
 888
 889     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
 890     retval = 0xFFFFFFFF;
 891     if (addr & 0xF)
 892         return retval;
 893     addr &= 0x1FFF0;
 894     idx = addr / 0x1000;
 895     dst = &opp->dst[idx];
 896     addr &= 0xFF0;
 897     switch (addr) {
 898     case 0x80: /* PCTP */
 899         retval = dst->pctp;
 900         break;
 901     case 0x90: /* WHOAMI */
 902         retval = idx;
 903         break;
 904     case 0xA0: /* PIAC */
 905         DPRINTF("Lower OpenPIC INT output\n");
 906         qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
 907         n_IRQ = IRQ_get_next(opp, &dst->raised);
 908         DPRINTF("PIAC: irq=%d\n", n_IRQ);
 909         if (n_IRQ == -1) {
 910             /* No more interrupt pending */
 911             retval = IPVP_VECTOR(opp->spve);
 912         } else {
 913             src = &opp->src[n_IRQ];
 914             if (!test_bit(&src->ipvp, IPVP_ACTIVITY) ||
 915                 !(IPVP_PRIORITY(src->ipvp) > dst->pctp)) {
 916                 /* - Spurious level-sensitive IRQ
 917                  * - Priorities has been changed
 918                  *   and the pending IRQ isn't allowed anymore
 919                  */
 920                 reset_bit(&src->ipvp, IPVP_ACTIVITY);
 921                 retval = IPVP_VECTOR(opp->spve);
 922             } else {
 923                 /* IRQ enter servicing state */
 924                 IRQ_setbit(&dst->servicing, n_IRQ);
 925                 retval = IPVP_VECTOR(src->ipvp);
 926             }
 927             IRQ_resetbit(&dst->raised, n_IRQ);
 928             dst->raised.next = -1;
 929             if (!test_bit(&src->ipvp, IPVP_SENSE)) {
 930                 /* edge-sensitive IRQ */
 931                 reset_bit(&src->ipvp, IPVP_ACTIVITY);
 932                 src->pending = 0;
 933             }
 934         }
 935         break;
 936     case 0xB0: /* PEOI */
 937         retval = 0;
 938         break;
 939 #if MAX_IPI > 0
 940     case 0x40: /* IDE */
 941     case 0x50:
 942         idx = (addr - 0x40) >> 4;
 943         retval = read_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IDE);
 944         break;
 945 #endif
 946     default:
 947         break;
 948     }
 949     DPRINTF("%s: => %08x\n", __func__, retval);
 950 #if defined TARGET_WORDS_BIGENDIAN
 951     retval = openpic_swap32(opp, retval);
 952 #endif
 953
 954     return retval;
 955 }
 956
 957 static void openpic_buggy_write (void *opaque,
 958                                  target_phys_addr_t addr, uint32_t val)
 959 {
 960     printf("Invalid OPENPIC write access !\n");
 961 }
 962
 963 static uint32_t openpic_buggy_read (void *opaque, target_phys_addr_t addr)
 964 {
 965     printf("Invalid OPENPIC read access !\n");
 966
 967     return -1;
 968 }
 969
 970 static void openpic_writel (void *opaque,
 971                             target_phys_addr_t addr, uint32_t val)
 972 {
 973     openpic_t *opp = opaque;
 974
 975     addr &= 0x3FFFF;
 976     DPRINTF("%s: offset %08x val: %08x\n", __func__, (int)addr, val);
 977     if (addr < 0x1100) {
 978         /* Global registers */
 979         openpic_gbl_write(opp, addr, val);
 980     } else if (addr < 0x10000) {
 981         /* Timers registers */
 982         openpic_timer_write(opp, addr, val);
 983     } else if (addr < 0x20000) {
 984         /* Source registers */
 985         openpic_src_write(opp, addr, val);
 986     } else {
 987         /* CPU registers */
 988         openpic_cpu_write(opp, addr, val);
 989     }
 990 }
 991
 992 static uint32_t openpic_readl (void *opaque,target_phys_addr_t addr)
 993 {
 994     openpic_t *opp = opaque;
 995     uint32_t retval;
 996
 997     addr &= 0x3FFFF;
 998     DPRINTF("%s: offset %08x\n", __func__, (int)addr);
 999     if (addr < 0x1100) {
1000         /* Global registers */
1001         retval = openpic_gbl_read(opp, addr);
1002     } else if (addr < 0x10000) {
1003         /* Timers registers */
1004         retval = openpic_timer_read(opp, addr);
1005     } else if (addr < 0x20000) {
1006         /* Source registers */
1007         retval = openpic_src_read(opp, addr);
1008     } else {
1009         /* CPU registers */
1010         retval = openpic_cpu_read(opp, addr);
1011     }
1012
1013     return retval;
1014 }
1015
1016 static CPUWriteMemoryFunc * const openpic_write[] = {
1017     &openpic_buggy_write,
1018     &openpic_buggy_write,
1019     &openpic_writel,
1020 };
1021
1022 static CPUReadMemoryFunc * const openpic_read[] = {
1023     &openpic_buggy_read,
1024     &openpic_buggy_read,
1025     &openpic_readl,
1026 };
1027
1028 static void openpic_map(PCIDevice *pci_dev, int region_num,
1029                         pcibus_t addr, pcibus_t size, int type)
1030 {
1031     openpic_t *opp;
1032
1033     DPRINTF("Map OpenPIC\n");
1034     opp = (openpic_t *)pci_dev;
1035     /* Global registers */
1036     DPRINTF("Register OPENPIC gbl   %08x => %08x\n",
1037             addr + 0x1000, addr + 0x1000 + 0x100);
1038     /* Timer registers */
1039     DPRINTF("Register OPENPIC timer %08x => %08x\n",
1040             addr + 0x1100, addr + 0x1100 + 0x40 * MAX_TMR);
1041     /* Interrupt source registers */
1042     DPRINTF("Register OPENPIC src   %08x => %08x\n",
1043             addr + 0x10000, addr + 0x10000 + 0x20 * (OPENPIC_EXT_IRQ + 2));
1044     /* Per CPU registers */
1045     DPRINTF("Register OPENPIC dst   %08x => %08x\n",
1046             addr + 0x20000, addr + 0x20000 + 0x1000 * MAX_CPU);
1047     cpu_register_physical_memory(addr, 0x40000, opp->mem_index);
1048 #if 0 // Don't implement ISU for now
1049     opp_io_memory = cpu_register_io_memory(openpic_src_read,
1050                                            openpic_src_write);
1051     cpu_register_physical_memory(isu_base, 0x20 * (EXT_IRQ + 2),
1052                                  opp_io_memory);
1053 #endif
1054 }
1055
1056 static void openpic_save_IRQ_queue(QEMUFile* f, IRQ_queue_t *q)
1057 {
1058     unsigned int i;
1059
1060     for (i = 0; i < BF_WIDTH(MAX_IRQ); i++)
1061         qemu_put_be32s(f, &q->queue[i]);
1062
1063     qemu_put_sbe32s(f, &q->next);
1064     qemu_put_sbe32s(f, &q->priority);
1065 }
1066
1067 static void openpic_save(QEMUFile* f, void *opaque)
1068 {
1069     openpic_t *opp = (openpic_t *)opaque;
1070     unsigned int i;
1071
1072     qemu_put_be32s(f, &opp->frep);
1073     qemu_put_be32s(f, &opp->glbc);
1074     qemu_put_be32s(f, &opp->micr);
1075     qemu_put_be32s(f, &opp->veni);
1076     qemu_put_be32s(f, &opp->pint);
1077     qemu_put_be32s(f, &opp->spve);
1078     qemu_put_be32s(f, &opp->tifr);
1079
1080     for (i = 0; i < opp->max_irq; i++) {
1081         qemu_put_be32s(f, &opp->src[i].ipvp);
1082         qemu_put_be32s(f, &opp->src[i].ide);
1083         qemu_put_sbe32s(f, &opp->src[i].type);
1084         qemu_put_sbe32s(f, &opp->src[i].last_cpu);
1085         qemu_put_sbe32s(f, &opp->src[i].pending);
1086     }
1087
1088     qemu_put_sbe32s(f, &opp->nb_cpus);
1089
1090     for (i = 0; i < opp->nb_cpus; i++) {
1091         qemu_put_be32s(f, &opp->dst[i].tfrr);
1092         qemu_put_be32s(f, &opp->dst[i].pctp);
1093         qemu_put_be32s(f, &opp->dst[i].pcsr);
1094         openpic_save_IRQ_queue(f, &opp->dst[i].raised);
1095         openpic_save_IRQ_queue(f, &opp->dst[i].servicing);
1096     }
1097
1098     for (i = 0; i < MAX_TMR; i++) {
1099         qemu_put_be32s(f, &opp->timers[i].ticc);
1100         qemu_put_be32s(f, &opp->timers[i].tibc);
1101     }
1102
1103 #if MAX_DBL > 0
1104     qemu_put_be32s(f, &opp->dar);
1105
1106     for (i = 0; i < MAX_DBL; i++) {
1107         qemu_put_be32s(f, &opp->doorbells[i].dmr);
1108     }
1109 #endif
1110
1111 #if MAX_MBX > 0
1112     for (i = 0; i < MAX_MAILBOXES; i++) {
1113         qemu_put_be32s(f, &opp->mailboxes[i].mbr);
1114     }
1115 #endif
1116
1117     pci_device_save(&opp->pci_dev, f);
1118 }
1119
1120 static void openpic_load_IRQ_queue(QEMUFile* f, IRQ_queue_t *q)
1121 {
1122     unsigned int i;
1123
1124     for (i = 0; i < BF_WIDTH(MAX_IRQ); i++)
1125         qemu_get_be32s(f, &q->queue[i]);
1126
1127     qemu_get_sbe32s(f, &q->next);
1128     qemu_get_sbe32s(f, &q->priority);
1129 }
1130
1131 static int openpic_load(QEMUFile* f, void *opaque, int version_id)
1132 {
1133     openpic_t *opp = (openpic_t *)opaque;
1134     unsigned int i;
1135
1136     if (version_id != 1)
1137         return -EINVAL;
1138
1139     qemu_get_be32s(f, &opp->frep);
1140     qemu_get_be32s(f, &opp->glbc);
1141     qemu_get_be32s(f, &opp->micr);
1142     qemu_get_be32s(f, &opp->veni);
1143     qemu_get_be32s(f, &opp->pint);
1144     qemu_get_be32s(f, &opp->spve);
1145     qemu_get_be32s(f, &opp->tifr);
1146
1147     for (i = 0; i < opp->max_irq; i++) {
1148         qemu_get_be32s(f, &opp->src[i].ipvp);
1149         qemu_get_be32s(f, &opp->src[i].ide);
1150         qemu_get_sbe32s(f, &opp->src[i].type);
1151         qemu_get_sbe32s(f, &opp->src[i].last_cpu);
1152         qemu_get_sbe32s(f, &opp->src[i].pending);
1153     }
1154
1155     qemu_get_sbe32s(f, &opp->nb_cpus);
1156
1157     for (i = 0; i < opp->nb_cpus; i++) {
1158         qemu_get_be32s(f, &opp->dst[i].tfrr);
1159         qemu_get_be32s(f, &opp->dst[i].pctp);
1160         qemu_get_be32s(f, &opp->dst[i].pcsr);
1161         openpic_load_IRQ_queue(f, &opp->dst[i].raised);
1162         openpic_load_IRQ_queue(f, &opp->dst[i].servicing);
1163     }
1164
1165     for (i = 0; i < MAX_TMR; i++) {
1166         qemu_get_be32s(f, &opp->timers[i].ticc);
1167         qemu_get_be32s(f, &opp->timers[i].tibc);
1168     }
1169
1170 #if MAX_DBL > 0
1171     qemu_get_be32s(f, &opp->dar);
1172
1173     for (i = 0; i < MAX_DBL; i++) {
1174         qemu_get_be32s(f, &opp->doorbells[i].dmr);
1175     }
1176 #endif
1177
1178 #if MAX_MBX > 0
1179     for (i = 0; i < MAX_MAILBOXES; i++) {
1180         qemu_get_be32s(f, &opp->mailboxes[i].mbr);
1181     }
1182 #endif
1183
1184     return pci_device_load(&opp->pci_dev, f);
1185 }
1186
1187 static void openpic_irq_raise(openpic_t *opp, int n_CPU, IRQ_src_t *src)
1188 {
1189     qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
1190 }
1191
1192 qemu_irq *openpic_init (PCIBus *bus, int *pmem_index, int nb_cpus,
1193                         qemu_irq **irqs, qemu_irq irq_out)
1194 {
1195     openpic_t *opp;
1196     uint8_t *pci_conf;
1197     int i, m;
1198
1199     /* XXX: for now, only one CPU is supported */
1200     if (nb_cpus != 1)
1201         return NULL;
1202     if (bus) {
1203         opp = (openpic_t *)pci_register_device(bus, "OpenPIC", sizeof(openpic_t),
1204                                                -1, NULL, NULL);
1205         if (opp == NULL)
1206             return NULL;
1207         pci_conf = opp->pci_dev.config;
1208         pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_IBM);
1209         pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_IBM_OPENPIC2);
1210         pci_config_set_class(pci_conf, PCI_CLASS_SYSTEM_OTHER); // FIXME?
1211         pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
1212         pci_conf[0x3d] = 0x00; // no interrupt pin
1213
1214         /* Register I/O spaces */
1215         pci_register_bar((PCIDevice *)opp, 0, 0x40000,
1216                                PCI_BASE_ADDRESS_SPACE_MEMORY, &openpic_map);
1217     } else {
1218         opp = qemu_mallocz(sizeof(openpic_t));
1219     }
1220     opp->mem_index = cpu_register_io_memory(openpic_read,
1221                                             openpic_write, opp);
1222
1223     //    isu_base &= 0xFFFC0000;
1224     opp->nb_cpus = nb_cpus;
1225     opp->max_irq = OPENPIC_MAX_IRQ;
1226     opp->irq_ipi0 = OPENPIC_IRQ_IPI0;
1227     opp->irq_tim0 = OPENPIC_IRQ_TIM0;
1228     /* Set IRQ types */
1229     for (i = 0; i < OPENPIC_EXT_IRQ; i++) {
1230         opp->src[i].type = IRQ_EXTERNAL;
1231     }
1232     for (; i < OPENPIC_IRQ_TIM0; i++) {
1233         opp->src[i].type = IRQ_SPECIAL;
1234     }
1235 #if MAX_IPI > 0
1236     m = OPENPIC_IRQ_IPI0;
1237 #else
1238     m = OPENPIC_IRQ_DBL0;
1239 #endif
1240     for (; i < m; i++) {
1241         opp->src[i].type = IRQ_TIMER;
1242     }
1243     for (; i < OPENPIC_MAX_IRQ; i++) {
1244         opp->src[i].type = IRQ_INTERNAL;
1245     }
1246     for (i = 0; i < nb_cpus; i++)
1247         opp->dst[i].irqs = irqs[i];
1248     opp->irq_out = irq_out;
1249     opp->need_swap = 1;
1250
1251     register_savevm("openpic", 0, 2, openpic_save, openpic_load, opp);
1252     qemu_register_reset(openpic_reset, opp);
1253
1254     opp->irq_raise = openpic_irq_raise;
1255     opp->reset = openpic_reset;
1256
1257     if (pmem_index)
1258         *pmem_index = opp->mem_index;
1259
1260     return qemu_allocate_irqs(openpic_set_irq, opp, opp->max_irq);
1261 }
1262
1263 static void mpic_irq_raise(openpic_t *mpp, int n_CPU, IRQ_src_t *src)
1264 {
1265     int n_ci = IDR_CI0 - n_CPU;
1266
1267     if(test_bit(&src->ide, n_ci)) {
1268         qemu_irq_raise(mpp->dst[n_CPU].irqs[OPENPIC_OUTPUT_CINT]);
1269     }
1270     else {
1271         qemu_irq_raise(mpp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
1272     }
1273 }
1274
1275 static void mpic_reset (void *opaque)
1276 {
1277     openpic_t *mpp = (openpic_t *)opaque;
1278     int i;
1279
1280     mpp->glbc = 0x80000000;
1281     /* Initialise controller registers */
1282     mpp->frep = 0x004f0002;
1283     mpp->veni = VENI;
1284     mpp->pint = 0x00000000;
1285     mpp->spve = 0x0000FFFF;
1286     /* Initialise IRQ sources */
1287     for (i = 0; i < mpp->max_irq; i++) {
1288         mpp->src[i].ipvp = 0x80800000;
1289         mpp->src[i].ide  = 0x00000001;
1290     }
1291     /* Initialise IRQ destinations */
1292     for (i = 0; i < MAX_CPU; i++) {
1293         mpp->dst[i].pctp      = 0x0000000F;
1294         mpp->dst[i].tfrr      = 0x00000000;
1295         memset(&mpp->dst[i].raised, 0, sizeof(IRQ_queue_t));
1296         mpp->dst[i].raised.next = -1;
1297         memset(&mpp->dst[i].servicing, 0, sizeof(IRQ_queue_t));
1298         mpp->dst[i].servicing.next = -1;
1299     }
1300     /* Initialise timers */
1301     for (i = 0; i < MAX_TMR; i++) {
1302         mpp->timers[i].ticc = 0x00000000;
1303         mpp->timers[i].tibc = 0x80000000;
1304     }
1305     /* Go out of RESET state */
1306     mpp->glbc = 0x00000000;
1307 }
1308
1309 static void mpic_timer_write (void *opaque, target_phys_addr_t addr, uint32_t val)
1310 {
1311     openpic_t *mpp = opaque;
1312     int idx, cpu;
1313
1314     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1315     if (addr & 0xF)
1316         return;
1317     addr &= 0xFFFF;
1318     cpu = addr >> 12;
1319     idx = (addr >> 6) & 0x3;
1320     switch (addr & 0x30) {
1321     case 0x00: /* gtccr */
1322         break;
1323     case 0x10: /* gtbcr */
1324         if ((mpp->timers[idx].ticc & 0x80000000) != 0 &&
1325             (val & 0x80000000) == 0 &&
1326             (mpp->timers[idx].tibc & 0x80000000) != 0)
1327             mpp->timers[idx].ticc &= ~0x80000000;
1328         mpp->timers[idx].tibc = val;
1329         break;
1330     case 0x20: /* GTIVPR */
1331         write_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IPVP, val);
1332         break;
1333     case 0x30: /* GTIDR & TFRR */
1334         if ((addr & 0xF0) == 0xF0)
1335             mpp->dst[cpu].tfrr = val;
1336         else
1337             write_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IDE, val);
1338         break;
1339     }
1340 }
1341
1342 static uint32_t mpic_timer_read (void *opaque, target_phys_addr_t addr)
1343 {
1344     openpic_t *mpp = opaque;
1345     uint32_t retval;
1346     int idx, cpu;
1347
1348     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1349     retval = 0xFFFFFFFF;
1350     if (addr & 0xF)
1351         return retval;
1352     addr &= 0xFFFF;
1353     cpu = addr >> 12;
1354     idx = (addr >> 6) & 0x3;
1355     switch (addr & 0x30) {
1356     case 0x00: /* gtccr */
1357         retval = mpp->timers[idx].ticc;
1358         break;
1359     case 0x10: /* gtbcr */
1360         retval = mpp->timers[idx].tibc;
1361         break;
1362     case 0x20: /* TIPV */
1363         retval = read_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IPVP);
1364         break;
1365     case 0x30: /* TIDR */
1366         if ((addr &0xF0) == 0XF0)
1367             retval = mpp->dst[cpu].tfrr;
1368         else
1369             retval = read_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IDE);
1370         break;
1371     }
1372     DPRINTF("%s: => %08x\n", __func__, retval);
1373
1374     return retval;
1375 }
1376
1377 static void mpic_src_ext_write (void *opaque, target_phys_addr_t addr,
1378                                 uint32_t val)
1379 {
1380     openpic_t *mpp = opaque;
1381     int idx = MPIC_EXT_IRQ;
1382
1383     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1384     if (addr & 0xF)
1385         return;
1386
1387     addr -= MPIC_EXT_REG_START & (TARGET_PAGE_SIZE - 1);
1388     if (addr < MPIC_EXT_REG_SIZE) {
1389         idx += (addr & 0xFFF0) >> 5;
1390         if (addr & 0x10) {
1391             /* EXDE / IFEDE / IEEDE */
1392             write_IRQreg(mpp, idx, IRQ_IDE, val);
1393         } else {
1394             /* EXVP / IFEVP / IEEVP */
1395             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1396         }
1397     }
1398 }
1399
1400 static uint32_t mpic_src_ext_read (void *opaque, target_phys_addr_t addr)
1401 {
1402     openpic_t *mpp = opaque;
1403     uint32_t retval;
1404     int idx = MPIC_EXT_IRQ;
1405
1406     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1407     retval = 0xFFFFFFFF;
1408     if (addr & 0xF)
1409         return retval;
1410
1411     addr -= MPIC_EXT_REG_START & (TARGET_PAGE_SIZE - 1);
1412     if (addr < MPIC_EXT_REG_SIZE) {
1413         idx += (addr & 0xFFF0) >> 5;
1414         if (addr & 0x10) {
1415             /* EXDE / IFEDE / IEEDE */
1416             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1417         } else {
1418             /* EXVP / IFEVP / IEEVP */
1419             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1420         }
1421         DPRINTF("%s: => %08x\n", __func__, retval);
1422     }
1423
1424     return retval;
1425 }
1426
1427 static void mpic_src_int_write (void *opaque, target_phys_addr_t addr,
1428                                 uint32_t val)
1429 {
1430     openpic_t *mpp = opaque;
1431     int idx = MPIC_INT_IRQ;
1432
1433     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1434     if (addr & 0xF)
1435         return;
1436
1437     addr -= MPIC_INT_REG_START & (TARGET_PAGE_SIZE - 1);
1438     if (addr < MPIC_INT_REG_SIZE) {
1439         idx += (addr & 0xFFF0) >> 5;
1440         if (addr & 0x10) {
1441             /* EXDE / IFEDE / IEEDE */
1442             write_IRQreg(mpp, idx, IRQ_IDE, val);
1443         } else {
1444             /* EXVP / IFEVP / IEEVP */
1445             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1446         }
1447     }
1448 }
1449
1450 static uint32_t mpic_src_int_read (void *opaque, target_phys_addr_t addr)
1451 {
1452     openpic_t *mpp = opaque;
1453     uint32_t retval;
1454     int idx = MPIC_INT_IRQ;
1455
1456     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1457     retval = 0xFFFFFFFF;
1458     if (addr & 0xF)
1459         return retval;
1460
1461     addr -= MPIC_INT_REG_START & (TARGET_PAGE_SIZE - 1);
1462     if (addr < MPIC_INT_REG_SIZE) {
1463         idx += (addr & 0xFFF0) >> 5;
1464         if (addr & 0x10) {
1465             /* EXDE / IFEDE / IEEDE */
1466             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1467         } else {
1468             /* EXVP / IFEVP / IEEVP */
1469             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1470         }
1471         DPRINTF("%s: => %08x\n", __func__, retval);
1472     }
1473
1474     return retval;
1475 }
1476
1477 static void mpic_src_msg_write (void *opaque, target_phys_addr_t addr,
1478                                 uint32_t val)
1479 {
1480     openpic_t *mpp = opaque;
1481     int idx = MPIC_MSG_IRQ;
1482
1483     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1484     if (addr & 0xF)
1485         return;
1486
1487     addr -= MPIC_MSG_REG_START & (TARGET_PAGE_SIZE - 1);
1488     if (addr < MPIC_MSG_REG_SIZE) {
1489         idx += (addr & 0xFFF0) >> 5;
1490         if (addr & 0x10) {
1491             /* EXDE / IFEDE / IEEDE */
1492             write_IRQreg(mpp, idx, IRQ_IDE, val);
1493         } else {
1494             /* EXVP / IFEVP / IEEVP */
1495             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1496         }
1497     }
1498 }
1499
1500 static uint32_t mpic_src_msg_read (void *opaque, target_phys_addr_t addr)
1501 {
1502     openpic_t *mpp = opaque;
1503     uint32_t retval;
1504     int idx = MPIC_MSG_IRQ;
1505
1506     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1507     retval = 0xFFFFFFFF;
1508     if (addr & 0xF)
1509         return retval;
1510
1511     addr -= MPIC_MSG_REG_START & (TARGET_PAGE_SIZE - 1);
1512     if (addr < MPIC_MSG_REG_SIZE) {
1513         idx += (addr & 0xFFF0) >> 5;
1514         if (addr & 0x10) {
1515             /* EXDE / IFEDE / IEEDE */
1516             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1517         } else {
1518             /* EXVP / IFEVP / IEEVP */
1519             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1520         }
1521         DPRINTF("%s: => %08x\n", __func__, retval);
1522     }
1523
1524     return retval;
1525 }
1526
1527 static void mpic_src_msi_write (void *opaque, target_phys_addr_t addr,
1528                                 uint32_t val)
1529 {
1530     openpic_t *mpp = opaque;
1531     int idx = MPIC_MSI_IRQ;
1532
1533     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1534     if (addr & 0xF)
1535         return;
1536
1537     addr -= MPIC_MSI_REG_START & (TARGET_PAGE_SIZE - 1);
1538     if (addr < MPIC_MSI_REG_SIZE) {
1539         idx += (addr & 0xFFF0) >> 5;
1540         if (addr & 0x10) {
1541             /* EXDE / IFEDE / IEEDE */
1542             write_IRQreg(mpp, idx, IRQ_IDE, val);
1543         } else {
1544             /* EXVP / IFEVP / IEEVP */
1545             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1546         }
1547     }
1548 }
1549 static uint32_t mpic_src_msi_read (void *opaque, target_phys_addr_t addr)
1550 {
1551     openpic_t *mpp = opaque;
1552     uint32_t retval;
1553     int idx = MPIC_MSI_IRQ;
1554
1555     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1556     retval = 0xFFFFFFFF;
1557     if (addr & 0xF)
1558         return retval;
1559
1560     addr -= MPIC_MSI_REG_START & (TARGET_PAGE_SIZE - 1);
1561     if (addr < MPIC_MSI_REG_SIZE) {
1562         idx += (addr & 0xFFF0) >> 5;
1563         if (addr & 0x10) {
1564             /* EXDE / IFEDE / IEEDE */
1565             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1566         } else {
1567             /* EXVP / IFEVP / IEEVP */
1568             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1569         }
1570         DPRINTF("%s: => %08x\n", __func__, retval);
1571     }
1572
1573     return retval;
1574 }
1575
1576 static CPUWriteMemoryFunc * const mpic_glb_write[] = {
1577     &openpic_buggy_write,
1578     &openpic_buggy_write,
1579     &openpic_gbl_write,
1580 };
1581
1582 static CPUReadMemoryFunc * const mpic_glb_read[] = {
1583     &openpic_buggy_read,
1584     &openpic_buggy_read,
1585     &openpic_gbl_read,
1586 };
1587
1588 static CPUWriteMemoryFunc * const mpic_tmr_write[] = {
1589     &openpic_buggy_write,
1590     &openpic_buggy_write,
1591     &mpic_timer_write,
1592 };
1593
1594 static CPUReadMemoryFunc * const mpic_tmr_read[] = {
1595     &openpic_buggy_read,
1596     &openpic_buggy_read,
1597     &mpic_timer_read,
1598 };
1599
1600 static CPUWriteMemoryFunc * const mpic_cpu_write[] = {
1601     &openpic_buggy_write,
1602     &openpic_buggy_write,
1603     &openpic_cpu_write,
1604 };
1605
1606 static CPUReadMemoryFunc * const mpic_cpu_read[] = {
1607     &openpic_buggy_read,
1608     &openpic_buggy_read,
1609     &openpic_cpu_read,
1610 };
1611
1612 static CPUWriteMemoryFunc * const mpic_ext_write[] = {
1613     &openpic_buggy_write,
1614     &openpic_buggy_write,
1615     &mpic_src_ext_write,
1616 };
1617
1618 static CPUReadMemoryFunc * const mpic_ext_read[] = {
1619     &openpic_buggy_read,
1620     &openpic_buggy_read,
1621     &mpic_src_ext_read,
1622 };
1623
1624 static CPUWriteMemoryFunc * const mpic_int_write[] = {
1625     &openpic_buggy_write,
1626     &openpic_buggy_write,
1627     &mpic_src_int_write,
1628 };
1629
1630 static CPUReadMemoryFunc * const mpic_int_read[] = {
1631     &openpic_buggy_read,
1632     &openpic_buggy_read,
1633     &mpic_src_int_read,
1634 };
1635
1636 static CPUWriteMemoryFunc * const mpic_msg_write[] = {
1637     &openpic_buggy_write,
1638     &openpic_buggy_write,
1639     &mpic_src_msg_write,
1640 };
1641
1642 static CPUReadMemoryFunc * const mpic_msg_read[] = {
1643     &openpic_buggy_read,
1644     &openpic_buggy_read,
1645     &mpic_src_msg_read,
1646 };
1647 static CPUWriteMemoryFunc * const mpic_msi_write[] = {
1648     &openpic_buggy_write,
1649     &openpic_buggy_write,
1650     &mpic_src_msi_write,
1651 };
1652
1653 static CPUReadMemoryFunc * const mpic_msi_read[] = {
1654     &openpic_buggy_read,
1655     &openpic_buggy_read,
1656     &mpic_src_msi_read,
1657 };
1658
1659 qemu_irq *mpic_init (target_phys_addr_t base, int nb_cpus,
1660                         qemu_irq **irqs, qemu_irq irq_out)
1661 {
1662     openpic_t *mpp;
1663     int i;
1664     struct {
1665         CPUReadMemoryFunc * const *read;
1666         CPUWriteMemoryFunc * const *write;
1667         target_phys_addr_t start_addr;
1668         ram_addr_t size;
1669     } const list[] = {
1670         {mpic_glb_read, mpic_glb_write, MPIC_GLB_REG_START, MPIC_GLB_REG_SIZE},
1671         {mpic_tmr_read, mpic_tmr_write, MPIC_TMR_REG_START, MPIC_TMR_REG_SIZE},
1672         {mpic_ext_read, mpic_ext_write, MPIC_EXT_REG_START, MPIC_EXT_REG_SIZE},
1673         {mpic_int_read, mpic_int_write, MPIC_INT_REG_START, MPIC_INT_REG_SIZE},
1674         {mpic_msg_read, mpic_msg_write, MPIC_MSG_REG_START, MPIC_MSG_REG_SIZE},
1675         {mpic_msi_read, mpic_msi_write, MPIC_MSI_REG_START, MPIC_MSI_REG_SIZE},
1676         {mpic_cpu_read, mpic_cpu_write, MPIC_CPU_REG_START, MPIC_CPU_REG_SIZE},
1677     };
1678
1679     /* XXX: for now, only one CPU is supported */
1680     if (nb_cpus != 1)
1681         return NULL;
1682
1683     mpp = qemu_mallocz(sizeof(openpic_t));
1684
1685     for (i = 0; i < sizeof(list)/sizeof(list[0]); i++) {
1686         int mem_index;
1687
1688         mem_index = cpu_register_io_memory(list[i].read, list[i].write, mpp);
1689         if (mem_index < 0) {
1690             goto free;
1691         }
1692         cpu_register_physical_memory(base + list[i].start_addr,
1693                                      list[i].size, mem_index);
1694     }
1695
1696     mpp->nb_cpus = nb_cpus;
1697     mpp->max_irq = MPIC_MAX_IRQ;
1698     mpp->irq_ipi0 = MPIC_IPI_IRQ;
1699     mpp->irq_tim0 = MPIC_TMR_IRQ;
1700
1701     for (i = 0; i < nb_cpus; i++)
1702         mpp->dst[i].irqs = irqs[i];
1703     mpp->irq_out = irq_out;
1704     mpp->need_swap = 0;    /* MPIC has the same endian as target */
1705
1706     mpp->irq_raise = mpic_irq_raise;
1707     mpp->reset = mpic_reset;
1708
1709     register_savevm("mpic", 0, 2, openpic_save, openpic_load, mpp);
1710     qemu_register_reset(mpic_reset, mpp);
1711
1712     return qemu_allocate_irqs(openpic_set_irq, mpp, mpp->max_irq);
1713
1714 free:
1715     qemu_free(mpp);
1716     return NULL;
1717 }