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 OPENPIC_PAGE_SIZE 4096
 145
 146 #define BF_WIDTH(_bits_) \
 147 (((_bits_) + (sizeof(uint32_t) * 8) - 1) / (sizeof(uint32_t) * 8))
 148
 149 static inline void set_bit (uint32_t *field, int bit)
 150 {
 151     field[bit >> 5] |= 1 << (bit & 0x1F);
 152 }
 153
 154 static inline void reset_bit (uint32_t *field, int bit)
 155 {
 156     field[bit >> 5] &= ~(1 << (bit & 0x1F));
 157 }
 158
 159 static inline int test_bit (uint32_t *field, int bit)
 160 {
 161     return (field[bit >> 5] & 1 << (bit & 0x1F)) != 0;
 162 }
 163
 164 enum {
 165     IRQ_EXTERNAL = 0x01,
 166     IRQ_INTERNAL = 0x02,
 167     IRQ_TIMER    = 0x04,
 168     IRQ_SPECIAL  = 0x08,
 169 };
 170
 171 typedef struct IRQ_queue_t {
 172     uint32_t queue[BF_WIDTH(MAX_IRQ)];
 173     int next;
 174     int priority;
 175 } IRQ_queue_t;
 176
 177 typedef struct IRQ_src_t {
 178     uint32_t ipvp;  /* IRQ vector/priority register */
 179     uint32_t ide;   /* IRQ destination register */
 180     int type;
 181     int last_cpu;
 182     int pending;    /* TRUE if IRQ is pending */
 183 } IRQ_src_t;
 184
 185 enum IPVP_bits {
 186     IPVP_MASK     = 31,
 187     IPVP_ACTIVITY = 30,
 188     IPVP_MODE     = 29,
 189     IPVP_POLARITY = 23,
 190     IPVP_SENSE    = 22,
 191 };
 192 #define IPVP_PRIORITY_MASK     (0x1F << 16)
 193 #define IPVP_PRIORITY(_ipvpr_) ((int)(((_ipvpr_) & IPVP_PRIORITY_MASK) >> 16))
 194 #define IPVP_VECTOR_MASK       ((1 << VECTOR_BITS) - 1)
 195 #define IPVP_VECTOR(_ipvpr_)   ((_ipvpr_) & IPVP_VECTOR_MASK)
 196
 197 typedef struct IRQ_dst_t {
 198     uint32_t tfrr;
 199     uint32_t pctp; /* CPU current task priority */
 200     uint32_t pcsr; /* CPU sensitivity register */
 201     IRQ_queue_t raised;
 202     IRQ_queue_t servicing;
 203     qemu_irq *irqs;
 204 } IRQ_dst_t;
 205
 206 typedef struct openpic_t {
 207     PCIDevice pci_dev;
 208     int mem_index;
 209     /* Global registers */
 210     uint32_t frep; /* Feature reporting register */
 211     uint32_t glbc; /* Global configuration register  */
 212     uint32_t micr; /* MPIC interrupt configuration register */
 213     uint32_t veni; /* Vendor identification register */
 214     uint32_t pint; /* Processor initialization register */
 215     uint32_t spve; /* Spurious vector register */
 216     uint32_t tifr; /* Timer frequency reporting register */
 217     /* Source registers */
 218     IRQ_src_t src[MAX_IRQ];
 219     /* Local registers per output pin */
 220     IRQ_dst_t dst[MAX_CPU];
 221     int nb_cpus;
 222     /* Timer registers */
 223     struct {
 224         uint32_t ticc;  /* Global timer current count register */
 225         uint32_t tibc;  /* Global timer base count register */
 226     } timers[MAX_TMR];
 227 #if MAX_DBL > 0
 228     /* Doorbell registers */
 229     uint32_t dar;        /* Doorbell activate register */
 230     struct {
 231         uint32_t dmr;    /* Doorbell messaging register */
 232     } doorbells[MAX_DBL];
 233 #endif
 234 #if MAX_MBX > 0
 235     /* Mailbox registers */
 236     struct {
 237         uint32_t mbr;    /* Mailbox register */
 238     } mailboxes[MAX_MAILBOXES];
 239 #endif
 240     /* IRQ out is used when in bypass mode (not implemented) */
 241     qemu_irq irq_out;
 242     int max_irq;
 243     int irq_ipi0;
 244     int irq_tim0;
 245     int need_swap;
 246     void (*reset) (void *);
 247     void (*irq_raise) (struct openpic_t *, int, IRQ_src_t *);
 248 } openpic_t;
 249
 250 static inline uint32_t openpic_swap32(openpic_t *opp, uint32_t val)
 251 {
 252     if (opp->need_swap)
 253         return bswap32(val);
 254
 255     return val;
 256 }
 257
 258 static inline void IRQ_setbit (IRQ_queue_t *q, int n_IRQ)
 259 {
 260     set_bit(q->queue, n_IRQ);
 261 }
 262
 263 static inline void IRQ_resetbit (IRQ_queue_t *q, int n_IRQ)
 264 {
 265     reset_bit(q->queue, n_IRQ);
 266 }
 267
 268 static inline int IRQ_testbit (IRQ_queue_t *q, int n_IRQ)
 269 {
 270     return test_bit(q->queue, n_IRQ);
 271 }
 272
 273 static void IRQ_check (openpic_t *opp, IRQ_queue_t *q)
 274 {
 275     int next, i;
 276     int priority;
 277
 278     next = -1;
 279     priority = -1;
 280     for (i = 0; i < opp->max_irq; i++) {
 281         if (IRQ_testbit(q, i)) {
 282             DPRINTF("IRQ_check: irq %d set ipvp_pr=%d pr=%d\n",
 283                     i, IPVP_PRIORITY(opp->src[i].ipvp), priority);
 284             if (IPVP_PRIORITY(opp->src[i].ipvp) > priority) {
 285                 next = i;
 286                 priority = IPVP_PRIORITY(opp->src[i].ipvp);
 287             }
 288         }
 289     }
 290     q->next = next;
 291     q->priority = priority;
 292 }
 293
 294 static int IRQ_get_next (openpic_t *opp, IRQ_queue_t *q)
 295 {
 296     if (q->next == -1) {
 297         /* XXX: optimize */
 298         IRQ_check(opp, q);
 299     }
 300
 301     return q->next;
 302 }
 303
 304 static void IRQ_local_pipe (openpic_t *opp, int n_CPU, int n_IRQ)
 305 {
 306     IRQ_dst_t *dst;
 307     IRQ_src_t *src;
 308     int priority;
 309
 310     dst = &opp->dst[n_CPU];
 311     src = &opp->src[n_IRQ];
 312     priority = IPVP_PRIORITY(src->ipvp);
 313     if (priority <= dst->pctp) {
 314         /* Too low priority */
 315         DPRINTF("%s: IRQ %d has too low priority on CPU %d\n",
 316                 __func__, n_IRQ, n_CPU);
 317         return;
 318     }
 319     if (IRQ_testbit(&dst->raised, n_IRQ)) {
 320         /* Interrupt miss */
 321         DPRINTF("%s: IRQ %d was missed on CPU %d\n",
 322                 __func__, n_IRQ, n_CPU);
 323         return;
 324     }
 325     set_bit(&src->ipvp, IPVP_ACTIVITY);
 326     IRQ_setbit(&dst->raised, n_IRQ);
 327     if (priority < dst->raised.priority) {
 328         /* An higher priority IRQ is already raised */
 329         DPRINTF("%s: IRQ %d is hidden by raised IRQ %d on CPU %d\n",
 330                 __func__, n_IRQ, dst->raised.next, n_CPU);
 331         return;
 332     }
 333     IRQ_get_next(opp, &dst->raised);
 334     if (IRQ_get_next(opp, &dst->servicing) != -1 &&
 335         priority <= dst->servicing.priority) {
 336         DPRINTF("%s: IRQ %d is hidden by servicing IRQ %d on CPU %d\n",
 337                 __func__, n_IRQ, dst->servicing.next, n_CPU);
 338         /* Already servicing a higher priority IRQ */
 339         return;
 340     }
 341     DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n", n_CPU, n_IRQ);
 342     opp->irq_raise(opp, n_CPU, src);
 343 }
 344
 345 /* update pic state because registers for n_IRQ have changed value */
 346 static void openpic_update_irq(openpic_t *opp, int n_IRQ)
 347 {
 348     IRQ_src_t *src;
 349     int i;
 350
 351     src = &opp->src[n_IRQ];
 352
 353     if (!src->pending) {
 354         /* no irq pending */
 355         DPRINTF("%s: IRQ %d is not pending\n", __func__, n_IRQ);
 356         return;
 357     }
 358     if (test_bit(&src->ipvp, IPVP_MASK)) {
 359         /* Interrupt source is disabled */
 360         DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ);
 361         return;
 362     }
 363     if (IPVP_PRIORITY(src->ipvp) == 0) {
 364         /* Priority set to zero */
 365         DPRINTF("%s: IRQ %d has 0 priority\n", __func__, n_IRQ);
 366         return;
 367     }
 368     if (test_bit(&src->ipvp, IPVP_ACTIVITY)) {
 369         /* IRQ already active */
 370         DPRINTF("%s: IRQ %d is already active\n", __func__, n_IRQ);
 371         return;
 372     }
 373     if (src->ide == 0x00000000) {
 374         /* No target */
 375         DPRINTF("%s: IRQ %d has no target\n", __func__, n_IRQ);
 376         return;
 377     }
 378
 379     if (src->ide == (1 << src->last_cpu)) {
 380         /* Only one CPU is allowed to receive this IRQ */
 381         IRQ_local_pipe(opp, src->last_cpu, n_IRQ);
 382     } else if (!test_bit(&src->ipvp, IPVP_MODE)) {
 383         /* Directed delivery mode */
 384         for (i = 0; i < opp->nb_cpus; i++) {
 385             if (test_bit(&src->ide, i))
 386                 IRQ_local_pipe(opp, i, n_IRQ);
 387         }
 388     } else {
 389         /* Distributed delivery mode */
 390         for (i = src->last_cpu + 1; i != src->last_cpu; i++) {
 391             if (i == opp->nb_cpus)
 392                 i = 0;
 393             if (test_bit(&src->ide, i)) {
 394                 IRQ_local_pipe(opp, i, n_IRQ);
 395                 src->last_cpu = i;
 396                 break;
 397             }
 398         }
 399     }
 400 }
 401
 402 static void openpic_set_irq(void *opaque, int n_IRQ, int level)
 403 {
 404     openpic_t *opp = opaque;
 405     IRQ_src_t *src;
 406
 407     src = &opp->src[n_IRQ];
 408     DPRINTF("openpic: set irq %d = %d ipvp=%08x\n",
 409             n_IRQ, level, src->ipvp);
 410     if (test_bit(&src->ipvp, IPVP_SENSE)) {
 411         /* level-sensitive irq */
 412         src->pending = level;
 413         if (!level)
 414             reset_bit(&src->ipvp, IPVP_ACTIVITY);
 415     } else {
 416         /* edge-sensitive irq */
 417         if (level)
 418             src->pending = 1;
 419     }
 420     openpic_update_irq(opp, n_IRQ);
 421 }
 422
 423 static void openpic_reset (void *opaque)
 424 {
 425     openpic_t *opp = (openpic_t *)opaque;
 426     int i;
 427
 428     opp->glbc = 0x80000000;
 429     /* Initialise controller registers */
 430     opp->frep = ((OPENPIC_EXT_IRQ - 1) << 16) | ((MAX_CPU - 1) << 8) | VID;
 431     opp->veni = VENI;
 432     opp->pint = 0x00000000;
 433     opp->spve = 0x000000FF;
 434     opp->tifr = 0x003F7A00;
 435     /* ? */
 436     opp->micr = 0x00000000;
 437     /* Initialise IRQ sources */
 438     for (i = 0; i < opp->max_irq; i++) {
 439         opp->src[i].ipvp = 0xA0000000;
 440         opp->src[i].ide  = 0x00000000;
 441     }
 442     /* Initialise IRQ destinations */
 443     for (i = 0; i < MAX_CPU; i++) {
 444         opp->dst[i].pctp      = 0x0000000F;
 445         opp->dst[i].pcsr      = 0x00000000;
 446         memset(&opp->dst[i].raised, 0, sizeof(IRQ_queue_t));
 447         opp->dst[i].raised.next = -1;
 448         memset(&opp->dst[i].servicing, 0, sizeof(IRQ_queue_t));
 449         opp->dst[i].servicing.next = -1;
 450     }
 451     /* Initialise timers */
 452     for (i = 0; i < MAX_TMR; i++) {
 453         opp->timers[i].ticc = 0x00000000;
 454         opp->timers[i].tibc = 0x80000000;
 455     }
 456     /* Initialise doorbells */
 457 #if MAX_DBL > 0
 458     opp->dar = 0x00000000;
 459     for (i = 0; i < MAX_DBL; i++) {
 460         opp->doorbells[i].dmr  = 0x00000000;
 461     }
 462 #endif
 463     /* Initialise mailboxes */
 464 #if MAX_MBX > 0
 465     for (i = 0; i < MAX_MBX; i++) { /* ? */
 466         opp->mailboxes[i].mbr   = 0x00000000;
 467     }
 468 #endif
 469     /* Go out of RESET state */
 470     opp->glbc = 0x00000000;
 471 }
 472
 473 static inline uint32_t read_IRQreg (openpic_t *opp, int n_IRQ, uint32_t reg)
 474 {
 475     uint32_t retval;
 476
 477     switch (reg) {
 478     case IRQ_IPVP:
 479         retval = opp->src[n_IRQ].ipvp;
 480         break;
 481     case IRQ_IDE:
 482         retval = opp->src[n_IRQ].ide;
 483         break;
 484     }
 485
 486     return retval;
 487 }
 488
 489 static inline void write_IRQreg (openpic_t *opp, int n_IRQ,
 490                                  uint32_t reg, uint32_t val)
 491 {
 492     uint32_t tmp;
 493
 494     switch (reg) {
 495     case IRQ_IPVP:
 496         /* NOTE: not fully accurate for special IRQs, but simple and
 497            sufficient */
 498         /* ACTIVITY bit is read-only */
 499         opp->src[n_IRQ].ipvp =
 500             (opp->src[n_IRQ].ipvp & 0x40000000) |
 501             (val & 0x800F00FF);
 502         openpic_update_irq(opp, n_IRQ);
 503         DPRINTF("Set IPVP %d to 0x%08x -> 0x%08x\n",
 504                 n_IRQ, val, opp->src[n_IRQ].ipvp);
 505         break;
 506     case IRQ_IDE:
 507         tmp = val & 0xC0000000;
 508         tmp |= val & ((1 << MAX_CPU) - 1);
 509         opp->src[n_IRQ].ide = tmp;
 510         DPRINTF("Set IDE %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].ide);
 511         break;
 512     }
 513 }
 514
 515 #if 0 // Code provision for Intel model
 516 #if MAX_DBL > 0
 517 static uint32_t read_doorbell_register (openpic_t *opp,
 518                                         int n_dbl, uint32_t offset)
 519 {
 520     uint32_t retval;
 521
 522     switch (offset) {
 523     case DBL_IPVP_OFFSET:
 524         retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP);
 525         break;
 526     case DBL_IDE_OFFSET:
 527         retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE);
 528         break;
 529     case DBL_DMR_OFFSET:
 530         retval = opp->doorbells[n_dbl].dmr;
 531         break;
 532     }
 533
 534     return retval;
 535 }
 536
 537 static void write_doorbell_register (penpic_t *opp, int n_dbl,
 538                                      uint32_t offset, uint32_t value)
 539 {
 540     switch (offset) {
 541     case DBL_IVPR_OFFSET:
 542         write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP, value);
 543         break;
 544     case DBL_IDE_OFFSET:
 545         write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE, value);
 546         break;
 547     case DBL_DMR_OFFSET:
 548         opp->doorbells[n_dbl].dmr = value;
 549         break;
 550     }
 551 }
 552 #endif
 553
 554 #if MAX_MBX > 0
 555 static uint32_t read_mailbox_register (openpic_t *opp,
 556                                        int n_mbx, uint32_t offset)
 557 {
 558     uint32_t retval;
 559
 560     switch (offset) {
 561     case MBX_MBR_OFFSET:
 562         retval = opp->mailboxes[n_mbx].mbr;
 563         break;
 564     case MBX_IVPR_OFFSET:
 565         retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP);
 566         break;
 567     case MBX_DMR_OFFSET:
 568         retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE);
 569         break;
 570     }
 571
 572     return retval;
 573 }
 574
 575 static void write_mailbox_register (openpic_t *opp, int n_mbx,
 576                                     uint32_t address, uint32_t value)
 577 {
 578     switch (offset) {
 579     case MBX_MBR_OFFSET:
 580         opp->mailboxes[n_mbx].mbr = value;
 581         break;
 582     case MBX_IVPR_OFFSET:
 583         write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP, value);
 584         break;
 585     case MBX_DMR_OFFSET:
 586         write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE, value);
 587         break;
 588     }
 589 }
 590 #endif
 591 #endif /* 0 : Code provision for Intel model */
 592
 593 static void openpic_gbl_write (void *opaque, target_phys_addr_t addr, uint32_t val)
 594 {
 595     openpic_t *opp = opaque;
 596     IRQ_dst_t *dst;
 597     int idx;
 598
 599     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
 600     if (addr & 0xF)
 601         return;
 602     val = openpic_swap32(opp, val);
 603     addr &= 0xFF;
 604     switch (addr) {
 605     case 0x00: /* FREP */
 606         break;
 607     case 0x20: /* GLBC */
 608         if (val & 0x80000000 && opp->reset)
 609             opp->reset(opp);
 610         opp->glbc = val & ~0x80000000;
 611         break;
 612     case 0x80: /* VENI */
 613         break;
 614     case 0x90: /* PINT */
 615         for (idx = 0; idx < opp->nb_cpus; idx++) {
 616             if ((val & (1 << idx)) && !(opp->pint & (1 << idx))) {
 617                 DPRINTF("Raise OpenPIC RESET output for CPU %d\n", idx);
 618                 dst = &opp->dst[idx];
 619                 qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_RESET]);
 620             } else if (!(val & (1 << idx)) && (opp->pint & (1 << idx))) {
 621                 DPRINTF("Lower OpenPIC RESET output for CPU %d\n", idx);
 622                 dst = &opp->dst[idx];
 623                 qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_RESET]);
 624             }
 625         }
 626         opp->pint = val;
 627         break;
 628 #if MAX_IPI > 0
 629     case 0xA0: /* IPI_IPVP */
 630     case 0xB0:
 631     case 0xC0:
 632     case 0xD0:
 633         {
 634             int idx;
 635             idx = (addr - 0xA0) >> 4;
 636             write_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IPVP, val);
 637         }
 638         break;
 639 #endif
 640     case 0xE0: /* SPVE */
 641         opp->spve = val & 0x000000FF;
 642         break;
 643     case 0xF0: /* TIFR */
 644         opp->tifr = val;
 645         break;
 646     default:
 647         break;
 648     }
 649 }
 650
 651 static uint32_t openpic_gbl_read (void *opaque, target_phys_addr_t addr)
 652 {
 653     openpic_t *opp = opaque;
 654     uint32_t retval;
 655
 656     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
 657     retval = 0xFFFFFFFF;
 658     if (addr & 0xF)
 659         return retval;
 660     addr &= 0xFF;
 661     switch (addr) {
 662     case 0x00: /* FREP */
 663         retval = opp->frep;
 664         break;
 665     case 0x20: /* GLBC */
 666         retval = opp->glbc;
 667         break;
 668     case 0x80: /* VENI */
 669         retval = opp->veni;
 670         break;
 671     case 0x90: /* PINT */
 672         retval = 0x00000000;
 673         break;
 674 #if MAX_IPI > 0
 675     case 0xA0: /* IPI_IPVP */
 676     case 0xB0:
 677     case 0xC0:
 678     case 0xD0:
 679         {
 680             int idx;
 681             idx = (addr - 0xA0) >> 4;
 682             retval = read_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IPVP);
 683         }
 684         break;
 685 #endif
 686     case 0xE0: /* SPVE */
 687         retval = opp->spve;
 688         break;
 689     case 0xF0: /* TIFR */
 690         retval = opp->tifr;
 691         break;
 692     default:
 693         break;
 694     }
 695     DPRINTF("%s: => %08x\n", __func__, retval);
 696     retval = openpic_swap32(opp, retval);
 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     val = openpic_swap32(opp, val);
 710     addr -= 0x1100;
 711     addr &= 0xFFFF;
 712     idx = (addr & 0xFFF0) >> 6;
 713     addr = addr & 0x30;
 714     switch (addr) {
 715     case 0x00: /* TICC */
 716         break;
 717     case 0x10: /* TIBC */
 718         if ((opp->timers[idx].ticc & 0x80000000) != 0 &&
 719             (val & 0x80000000) == 0 &&
 720             (opp->timers[idx].tibc & 0x80000000) != 0)
 721             opp->timers[idx].ticc &= ~0x80000000;
 722         opp->timers[idx].tibc = val;
 723         break;
 724     case 0x20: /* TIVP */
 725         write_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IPVP, val);
 726         break;
 727     case 0x30: /* TIDE */
 728         write_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IDE, val);
 729         break;
 730     }
 731 }
 732
 733 static uint32_t openpic_timer_read (void *opaque, uint32_t addr)
 734 {
 735     openpic_t *opp = opaque;
 736     uint32_t retval;
 737     int idx;
 738
 739     DPRINTF("%s: addr %08x\n", __func__, addr);
 740     retval = 0xFFFFFFFF;
 741     if (addr & 0xF)
 742         return retval;
 743     addr -= 0x1100;
 744     addr &= 0xFFFF;
 745     idx = (addr & 0xFFF0) >> 6;
 746     addr = addr & 0x30;
 747     switch (addr) {
 748     case 0x00: /* TICC */
 749         retval = opp->timers[idx].ticc;
 750         break;
 751     case 0x10: /* TIBC */
 752         retval = opp->timers[idx].tibc;
 753         break;
 754     case 0x20: /* TIPV */
 755         retval = read_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IPVP);
 756         break;
 757     case 0x30: /* TIDE */
 758         retval = read_IRQreg(opp, opp->irq_tim0 + idx, IRQ_IDE);
 759         break;
 760     }
 761     DPRINTF("%s: => %08x\n", __func__, retval);
 762     retval = openpic_swap32(opp, retval);
 763
 764     return retval;
 765 }
 766
 767 static void openpic_src_write (void *opaque, uint32_t addr, uint32_t val)
 768 {
 769     openpic_t *opp = opaque;
 770     int idx;
 771
 772     DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
 773     if (addr & 0xF)
 774         return;
 775     val = openpic_swap32(opp, val);
 776     addr = addr & 0xFFF0;
 777     idx = addr >> 5;
 778     if (addr & 0x10) {
 779         /* EXDE / IFEDE / IEEDE */
 780         write_IRQreg(opp, idx, IRQ_IDE, val);
 781     } else {
 782         /* EXVP / IFEVP / IEEVP */
 783         write_IRQreg(opp, idx, IRQ_IPVP, val);
 784     }
 785 }
 786
 787 static uint32_t openpic_src_read (void *opaque, uint32_t addr)
 788 {
 789     openpic_t *opp = opaque;
 790     uint32_t retval;
 791     int idx;
 792
 793     DPRINTF("%s: addr %08x\n", __func__, addr);
 794     retval = 0xFFFFFFFF;
 795     if (addr & 0xF)
 796         return retval;
 797     addr = addr & 0xFFF0;
 798     idx = addr >> 5;
 799     if (addr & 0x10) {
 800         /* EXDE / IFEDE / IEEDE */
 801         retval = read_IRQreg(opp, idx, IRQ_IDE);
 802     } else {
 803         /* EXVP / IFEVP / IEEVP */
 804         retval = read_IRQreg(opp, idx, IRQ_IPVP);
 805     }
 806     DPRINTF("%s: => %08x\n", __func__, retval);
 807     retval = openpic_swap32(opp, retval);
 808
 809     return retval;
 810 }
 811
 812 static void openpic_cpu_write (void *opaque, target_phys_addr_t addr, uint32_t val)
 813 {
 814     openpic_t *opp = opaque;
 815     IRQ_src_t *src;
 816     IRQ_dst_t *dst;
 817     int idx, s_IRQ, n_IRQ;
 818
 819     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
 820     if (addr & 0xF)
 821         return;
 822     val = openpic_swap32(opp, val);
 823     addr &= 0x1FFF0;
 824     idx = addr / 0x1000;
 825     dst = &opp->dst[idx];
 826     addr &= 0xFF0;
 827     switch (addr) {
 828 #if MAX_IPI > 0
 829     case 0x40: /* PIPD */
 830     case 0x50:
 831     case 0x60:
 832     case 0x70:
 833         idx = (addr - 0x40) >> 4;
 834         write_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IDE, val);
 835         openpic_set_irq(opp, opp->irq_ipi0 + idx, 1);
 836         openpic_set_irq(opp, opp->irq_ipi0 + idx, 0);
 837         break;
 838 #endif
 839     case 0x80: /* PCTP */
 840         dst->pctp = val & 0x0000000F;
 841         break;
 842     case 0x90: /* WHOAMI */
 843         /* Read-only register */
 844         break;
 845     case 0xA0: /* PIAC */
 846         /* Read-only register */
 847         break;
 848     case 0xB0: /* PEOI */
 849         DPRINTF("PEOI\n");
 850         s_IRQ = IRQ_get_next(opp, &dst->servicing);
 851         IRQ_resetbit(&dst->servicing, s_IRQ);
 852         dst->servicing.next = -1;
 853         /* Set up next servicing IRQ */
 854         s_IRQ = IRQ_get_next(opp, &dst->servicing);
 855         /* Check queued interrupts. */
 856         n_IRQ = IRQ_get_next(opp, &dst->raised);
 857         src = &opp->src[n_IRQ];
 858         if (n_IRQ != -1 &&
 859             (s_IRQ == -1 ||
 860              IPVP_PRIORITY(src->ipvp) > dst->servicing.priority)) {
 861             DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n",
 862                     idx, n_IRQ);
 863             opp->irq_raise(opp, idx, src);
 864         }
 865         break;
 866     default:
 867         break;
 868     }
 869 }
 870
 871 static uint32_t openpic_cpu_read (void *opaque, target_phys_addr_t addr)
 872 {
 873     openpic_t *opp = opaque;
 874     IRQ_src_t *src;
 875     IRQ_dst_t *dst;
 876     uint32_t retval;
 877     int idx, n_IRQ;
 878
 879     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
 880     retval = 0xFFFFFFFF;
 881     if (addr & 0xF)
 882         return retval;
 883     addr &= 0x1FFF0;
 884     idx = addr / 0x1000;
 885     dst = &opp->dst[idx];
 886     addr &= 0xFF0;
 887     switch (addr) {
 888     case 0x80: /* PCTP */
 889         retval = dst->pctp;
 890         break;
 891     case 0x90: /* WHOAMI */
 892         retval = idx;
 893         break;
 894     case 0xA0: /* PIAC */
 895         DPRINTF("Lower OpenPIC INT output\n");
 896         qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
 897         n_IRQ = IRQ_get_next(opp, &dst->raised);
 898         DPRINTF("PIAC: irq=%d\n", n_IRQ);
 899         if (n_IRQ == -1) {
 900             /* No more interrupt pending */
 901             retval = IPVP_VECTOR(opp->spve);
 902         } else {
 903             src = &opp->src[n_IRQ];
 904             if (!test_bit(&src->ipvp, IPVP_ACTIVITY) ||
 905                 !(IPVP_PRIORITY(src->ipvp) > dst->pctp)) {
 906                 /* - Spurious level-sensitive IRQ
 907                  * - Priorities has been changed
 908                  *   and the pending IRQ isn't allowed anymore
 909                  */
 910                 reset_bit(&src->ipvp, IPVP_ACTIVITY);
 911                 retval = IPVP_VECTOR(opp->spve);
 912             } else {
 913                 /* IRQ enter servicing state */
 914                 IRQ_setbit(&dst->servicing, n_IRQ);
 915                 retval = IPVP_VECTOR(src->ipvp);
 916             }
 917             IRQ_resetbit(&dst->raised, n_IRQ);
 918             dst->raised.next = -1;
 919             if (!test_bit(&src->ipvp, IPVP_SENSE)) {
 920                 /* edge-sensitive IRQ */
 921                 reset_bit(&src->ipvp, IPVP_ACTIVITY);
 922                 src->pending = 0;
 923             }
 924         }
 925         break;
 926     case 0xB0: /* PEOI */
 927         retval = 0;
 928         break;
 929 #if MAX_IPI > 0
 930     case 0x40: /* IDE */
 931     case 0x50:
 932         idx = (addr - 0x40) >> 4;
 933         retval = read_IRQreg(opp, opp->irq_ipi0 + idx, IRQ_IDE);
 934         break;
 935 #endif
 936     default:
 937         break;
 938     }
 939     DPRINTF("%s: => %08x\n", __func__, retval);
 940     retval = openpic_swap32(opp, retval);
 941
 942     return retval;
 943 }
 944
 945 static void openpic_buggy_write (void *opaque,
 946                                  target_phys_addr_t addr, uint32_t val)
 947 {
 948     printf("Invalid OPENPIC write access !\n");
 949 }
 950
 951 static uint32_t openpic_buggy_read (void *opaque, target_phys_addr_t addr)
 952 {
 953     printf("Invalid OPENPIC read access !\n");
 954
 955     return -1;
 956 }
 957
 958 static void openpic_writel (void *opaque,
 959                             target_phys_addr_t addr, uint32_t val)
 960 {
 961     openpic_t *opp = opaque;
 962
 963     addr &= 0x3FFFF;
 964     DPRINTF("%s: offset %08x val: %08x\n", __func__, (int)addr, val);
 965     if (addr < 0x1100) {
 966         /* Global registers */
 967         openpic_gbl_write(opp, addr, val);
 968     } else if (addr < 0x10000) {
 969         /* Timers registers */
 970         openpic_timer_write(opp, addr, val);
 971     } else if (addr < 0x20000) {
 972         /* Source registers */
 973         openpic_src_write(opp, addr, val);
 974     } else {
 975         /* CPU registers */
 976         openpic_cpu_write(opp, addr, val);
 977     }
 978 }
 979
 980 static uint32_t openpic_readl (void *opaque,target_phys_addr_t addr)
 981 {
 982     openpic_t *opp = opaque;
 983     uint32_t retval;
 984
 985     addr &= 0x3FFFF;
 986     DPRINTF("%s: offset %08x\n", __func__, (int)addr);
 987     if (addr < 0x1100) {
 988         /* Global registers */
 989         retval = openpic_gbl_read(opp, addr);
 990     } else if (addr < 0x10000) {
 991         /* Timers registers */
 992         retval = openpic_timer_read(opp, addr);
 993     } else if (addr < 0x20000) {
 994         /* Source registers */
 995         retval = openpic_src_read(opp, addr);
 996     } else {
 997         /* CPU registers */
 998         retval = openpic_cpu_read(opp, addr);
 999     }
1000
1001     return retval;
1002 }
1003
1004 static CPUWriteMemoryFunc * const openpic_write[] = {
1005     &openpic_buggy_write,
1006     &openpic_buggy_write,
1007     &openpic_writel,
1008 };
1009
1010 static CPUReadMemoryFunc * const openpic_read[] = {
1011     &openpic_buggy_read,
1012     &openpic_buggy_read,
1013     &openpic_readl,
1014 };
1015
1016 static void openpic_map(PCIDevice *pci_dev, int region_num,
1017                         pcibus_t addr, pcibus_t size, int type)
1018 {
1019     openpic_t *opp;
1020
1021     DPRINTF("Map OpenPIC\n");
1022     opp = (openpic_t *)pci_dev;
1023     /* Global registers */
1024     DPRINTF("Register OPENPIC gbl   %08x => %08x\n",
1025             addr + 0x1000, addr + 0x1000 + 0x100);
1026     /* Timer registers */
1027     DPRINTF("Register OPENPIC timer %08x => %08x\n",
1028             addr + 0x1100, addr + 0x1100 + 0x40 * MAX_TMR);
1029     /* Interrupt source registers */
1030     DPRINTF("Register OPENPIC src   %08x => %08x\n",
1031             addr + 0x10000, addr + 0x10000 + 0x20 * (OPENPIC_EXT_IRQ + 2));
1032     /* Per CPU registers */
1033     DPRINTF("Register OPENPIC dst   %08x => %08x\n",
1034             addr + 0x20000, addr + 0x20000 + 0x1000 * MAX_CPU);
1035     cpu_register_physical_memory(addr, 0x40000, opp->mem_index);
1036 #if 0 // Don't implement ISU for now
1037     opp_io_memory = cpu_register_io_memory(openpic_src_read,
1038                                            openpic_src_write);
1039     cpu_register_physical_memory(isu_base, 0x20 * (EXT_IRQ + 2),
1040                                  opp_io_memory);
1041 #endif
1042 }
1043
1044 static void openpic_save_IRQ_queue(QEMUFile* f, IRQ_queue_t *q)
1045 {
1046     unsigned int i;
1047
1048     for (i = 0; i < BF_WIDTH(MAX_IRQ); i++)
1049         qemu_put_be32s(f, &q->queue[i]);
1050
1051     qemu_put_sbe32s(f, &q->next);
1052     qemu_put_sbe32s(f, &q->priority);
1053 }
1054
1055 static void openpic_save(QEMUFile* f, void *opaque)
1056 {
1057     openpic_t *opp = (openpic_t *)opaque;
1058     unsigned int i;
1059
1060     qemu_put_be32s(f, &opp->frep);
1061     qemu_put_be32s(f, &opp->glbc);
1062     qemu_put_be32s(f, &opp->micr);
1063     qemu_put_be32s(f, &opp->veni);
1064     qemu_put_be32s(f, &opp->pint);
1065     qemu_put_be32s(f, &opp->spve);
1066     qemu_put_be32s(f, &opp->tifr);
1067
1068     for (i = 0; i < opp->max_irq; i++) {
1069         qemu_put_be32s(f, &opp->src[i].ipvp);
1070         qemu_put_be32s(f, &opp->src[i].ide);
1071         qemu_put_sbe32s(f, &opp->src[i].type);
1072         qemu_put_sbe32s(f, &opp->src[i].last_cpu);
1073         qemu_put_sbe32s(f, &opp->src[i].pending);
1074     }
1075
1076     qemu_put_sbe32s(f, &opp->nb_cpus);
1077
1078     for (i = 0; i < opp->nb_cpus; i++) {
1079         qemu_put_be32s(f, &opp->dst[i].tfrr);
1080         qemu_put_be32s(f, &opp->dst[i].pctp);
1081         qemu_put_be32s(f, &opp->dst[i].pcsr);
1082         openpic_save_IRQ_queue(f, &opp->dst[i].raised);
1083         openpic_save_IRQ_queue(f, &opp->dst[i].servicing);
1084     }
1085
1086     for (i = 0; i < MAX_TMR; i++) {
1087         qemu_put_be32s(f, &opp->timers[i].ticc);
1088         qemu_put_be32s(f, &opp->timers[i].tibc);
1089     }
1090
1091 #if MAX_DBL > 0
1092     qemu_put_be32s(f, &opp->dar);
1093
1094     for (i = 0; i < MAX_DBL; i++) {
1095         qemu_put_be32s(f, &opp->doorbells[i].dmr);
1096     }
1097 #endif
1098
1099 #if MAX_MBX > 0
1100     for (i = 0; i < MAX_MAILBOXES; i++) {
1101         qemu_put_be32s(f, &opp->mailboxes[i].mbr);
1102     }
1103 #endif
1104
1105     pci_device_save(&opp->pci_dev, f);
1106 }
1107
1108 static void openpic_load_IRQ_queue(QEMUFile* f, IRQ_queue_t *q)
1109 {
1110     unsigned int i;
1111
1112     for (i = 0; i < BF_WIDTH(MAX_IRQ); i++)
1113         qemu_get_be32s(f, &q->queue[i]);
1114
1115     qemu_get_sbe32s(f, &q->next);
1116     qemu_get_sbe32s(f, &q->priority);
1117 }
1118
1119 static int openpic_load(QEMUFile* f, void *opaque, int version_id)
1120 {
1121     openpic_t *opp = (openpic_t *)opaque;
1122     unsigned int i;
1123
1124     if (version_id != 1)
1125         return -EINVAL;
1126
1127     qemu_get_be32s(f, &opp->frep);
1128     qemu_get_be32s(f, &opp->glbc);
1129     qemu_get_be32s(f, &opp->micr);
1130     qemu_get_be32s(f, &opp->veni);
1131     qemu_get_be32s(f, &opp->pint);
1132     qemu_get_be32s(f, &opp->spve);
1133     qemu_get_be32s(f, &opp->tifr);
1134
1135     for (i = 0; i < opp->max_irq; i++) {
1136         qemu_get_be32s(f, &opp->src[i].ipvp);
1137         qemu_get_be32s(f, &opp->src[i].ide);
1138         qemu_get_sbe32s(f, &opp->src[i].type);
1139         qemu_get_sbe32s(f, &opp->src[i].last_cpu);
1140         qemu_get_sbe32s(f, &opp->src[i].pending);
1141     }
1142
1143     qemu_get_sbe32s(f, &opp->nb_cpus);
1144
1145     for (i = 0; i < opp->nb_cpus; i++) {
1146         qemu_get_be32s(f, &opp->dst[i].tfrr);
1147         qemu_get_be32s(f, &opp->dst[i].pctp);
1148         qemu_get_be32s(f, &opp->dst[i].pcsr);
1149         openpic_load_IRQ_queue(f, &opp->dst[i].raised);
1150         openpic_load_IRQ_queue(f, &opp->dst[i].servicing);
1151     }
1152
1153     for (i = 0; i < MAX_TMR; i++) {
1154         qemu_get_be32s(f, &opp->timers[i].ticc);
1155         qemu_get_be32s(f, &opp->timers[i].tibc);
1156     }
1157
1158 #if MAX_DBL > 0
1159     qemu_get_be32s(f, &opp->dar);
1160
1161     for (i = 0; i < MAX_DBL; i++) {
1162         qemu_get_be32s(f, &opp->doorbells[i].dmr);
1163     }
1164 #endif
1165
1166 #if MAX_MBX > 0
1167     for (i = 0; i < MAX_MAILBOXES; i++) {
1168         qemu_get_be32s(f, &opp->mailboxes[i].mbr);
1169     }
1170 #endif
1171
1172     return pci_device_load(&opp->pci_dev, f);
1173 }
1174
1175 static void openpic_irq_raise(openpic_t *opp, int n_CPU, IRQ_src_t *src)
1176 {
1177     qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
1178 }
1179
1180 qemu_irq *openpic_init (PCIBus *bus, int *pmem_index, int nb_cpus,
1181                         qemu_irq **irqs, qemu_irq irq_out)
1182 {
1183     openpic_t *opp;
1184     uint8_t *pci_conf;
1185     int i, m;
1186
1187     /* XXX: for now, only one CPU is supported */
1188     if (nb_cpus != 1)
1189         return NULL;
1190     if (bus) {
1191         opp = (openpic_t *)pci_register_device(bus, "OpenPIC", sizeof(openpic_t),
1192                                                -1, NULL, NULL);
1193         pci_conf = opp->pci_dev.config;
1194         pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_IBM);
1195         pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_IBM_OPENPIC2);
1196         pci_config_set_class(pci_conf, PCI_CLASS_SYSTEM_OTHER); // FIXME?
1197         pci_conf[0x3d] = 0x00; // no interrupt pin
1198
1199         /* Register I/O spaces */
1200         pci_register_bar((PCIDevice *)opp, 0, 0x40000,
1201                                PCI_BASE_ADDRESS_SPACE_MEMORY, &openpic_map);
1202     } else {
1203         opp = qemu_mallocz(sizeof(openpic_t));
1204     }
1205     opp->mem_index = cpu_register_io_memory(openpic_read,
1206                                             openpic_write, opp);
1207
1208     //    isu_base &= 0xFFFC0000;
1209     opp->nb_cpus = nb_cpus;
1210     opp->max_irq = OPENPIC_MAX_IRQ;
1211     opp->irq_ipi0 = OPENPIC_IRQ_IPI0;
1212     opp->irq_tim0 = OPENPIC_IRQ_TIM0;
1213     /* Set IRQ types */
1214     for (i = 0; i < OPENPIC_EXT_IRQ; i++) {
1215         opp->src[i].type = IRQ_EXTERNAL;
1216     }
1217     for (; i < OPENPIC_IRQ_TIM0; i++) {
1218         opp->src[i].type = IRQ_SPECIAL;
1219     }
1220 #if MAX_IPI > 0
1221     m = OPENPIC_IRQ_IPI0;
1222 #else
1223     m = OPENPIC_IRQ_DBL0;
1224 #endif
1225     for (; i < m; i++) {
1226         opp->src[i].type = IRQ_TIMER;
1227     }
1228     for (; i < OPENPIC_MAX_IRQ; i++) {
1229         opp->src[i].type = IRQ_INTERNAL;
1230     }
1231     for (i = 0; i < nb_cpus; i++)
1232         opp->dst[i].irqs = irqs[i];
1233     opp->irq_out = irq_out;
1234     opp->need_swap = 1;
1235
1236     register_savevm(&opp->pci_dev.qdev, "openpic", 0, 2,
1237                     openpic_save, openpic_load, opp);
1238     qemu_register_reset(openpic_reset, opp);
1239
1240     opp->irq_raise = openpic_irq_raise;
1241     opp->reset = openpic_reset;
1242
1243     if (pmem_index)
1244         *pmem_index = opp->mem_index;
1245
1246     return qemu_allocate_irqs(openpic_set_irq, opp, opp->max_irq);
1247 }
1248
1249 static void mpic_irq_raise(openpic_t *mpp, int n_CPU, IRQ_src_t *src)
1250 {
1251     int n_ci = IDR_CI0 - n_CPU;
1252
1253     if(test_bit(&src->ide, n_ci)) {
1254         qemu_irq_raise(mpp->dst[n_CPU].irqs[OPENPIC_OUTPUT_CINT]);
1255     }
1256     else {
1257         qemu_irq_raise(mpp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
1258     }
1259 }
1260
1261 static void mpic_reset (void *opaque)
1262 {
1263     openpic_t *mpp = (openpic_t *)opaque;
1264     int i;
1265
1266     mpp->glbc = 0x80000000;
1267     /* Initialise controller registers */
1268     mpp->frep = 0x004f0002;
1269     mpp->veni = VENI;
1270     mpp->pint = 0x00000000;
1271     mpp->spve = 0x0000FFFF;
1272     /* Initialise IRQ sources */
1273     for (i = 0; i < mpp->max_irq; i++) {
1274         mpp->src[i].ipvp = 0x80800000;
1275         mpp->src[i].ide  = 0x00000001;
1276     }
1277     /* Initialise IRQ destinations */
1278     for (i = 0; i < MAX_CPU; i++) {
1279         mpp->dst[i].pctp      = 0x0000000F;
1280         mpp->dst[i].tfrr      = 0x00000000;
1281         memset(&mpp->dst[i].raised, 0, sizeof(IRQ_queue_t));
1282         mpp->dst[i].raised.next = -1;
1283         memset(&mpp->dst[i].servicing, 0, sizeof(IRQ_queue_t));
1284         mpp->dst[i].servicing.next = -1;
1285     }
1286     /* Initialise timers */
1287     for (i = 0; i < MAX_TMR; i++) {
1288         mpp->timers[i].ticc = 0x00000000;
1289         mpp->timers[i].tibc = 0x80000000;
1290     }
1291     /* Go out of RESET state */
1292     mpp->glbc = 0x00000000;
1293 }
1294
1295 static void mpic_timer_write (void *opaque, target_phys_addr_t addr, uint32_t val)
1296 {
1297     openpic_t *mpp = opaque;
1298     int idx, cpu;
1299
1300     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1301     if (addr & 0xF)
1302         return;
1303     addr &= 0xFFFF;
1304     cpu = addr >> 12;
1305     idx = (addr >> 6) & 0x3;
1306     switch (addr & 0x30) {
1307     case 0x00: /* gtccr */
1308         break;
1309     case 0x10: /* gtbcr */
1310         if ((mpp->timers[idx].ticc & 0x80000000) != 0 &&
1311             (val & 0x80000000) == 0 &&
1312             (mpp->timers[idx].tibc & 0x80000000) != 0)
1313             mpp->timers[idx].ticc &= ~0x80000000;
1314         mpp->timers[idx].tibc = val;
1315         break;
1316     case 0x20: /* GTIVPR */
1317         write_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IPVP, val);
1318         break;
1319     case 0x30: /* GTIDR & TFRR */
1320         if ((addr & 0xF0) == 0xF0)
1321             mpp->dst[cpu].tfrr = val;
1322         else
1323             write_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IDE, val);
1324         break;
1325     }
1326 }
1327
1328 static uint32_t mpic_timer_read (void *opaque, target_phys_addr_t addr)
1329 {
1330     openpic_t *mpp = opaque;
1331     uint32_t retval;
1332     int idx, cpu;
1333
1334     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1335     retval = 0xFFFFFFFF;
1336     if (addr & 0xF)
1337         return retval;
1338     addr &= 0xFFFF;
1339     cpu = addr >> 12;
1340     idx = (addr >> 6) & 0x3;
1341     switch (addr & 0x30) {
1342     case 0x00: /* gtccr */
1343         retval = mpp->timers[idx].ticc;
1344         break;
1345     case 0x10: /* gtbcr */
1346         retval = mpp->timers[idx].tibc;
1347         break;
1348     case 0x20: /* TIPV */
1349         retval = read_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IPVP);
1350         break;
1351     case 0x30: /* TIDR */
1352         if ((addr &0xF0) == 0XF0)
1353             retval = mpp->dst[cpu].tfrr;
1354         else
1355             retval = read_IRQreg(mpp, MPIC_TMR_IRQ + idx, IRQ_IDE);
1356         break;
1357     }
1358     DPRINTF("%s: => %08x\n", __func__, retval);
1359
1360     return retval;
1361 }
1362
1363 static void mpic_src_ext_write (void *opaque, target_phys_addr_t addr,
1364                                 uint32_t val)
1365 {
1366     openpic_t *mpp = opaque;
1367     int idx = MPIC_EXT_IRQ;
1368
1369     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1370     if (addr & 0xF)
1371         return;
1372
1373     addr -= MPIC_EXT_REG_START & (OPENPIC_PAGE_SIZE - 1);
1374     if (addr < MPIC_EXT_REG_SIZE) {
1375         idx += (addr & 0xFFF0) >> 5;
1376         if (addr & 0x10) {
1377             /* EXDE / IFEDE / IEEDE */
1378             write_IRQreg(mpp, idx, IRQ_IDE, val);
1379         } else {
1380             /* EXVP / IFEVP / IEEVP */
1381             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1382         }
1383     }
1384 }
1385
1386 static uint32_t mpic_src_ext_read (void *opaque, target_phys_addr_t addr)
1387 {
1388     openpic_t *mpp = opaque;
1389     uint32_t retval;
1390     int idx = MPIC_EXT_IRQ;
1391
1392     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1393     retval = 0xFFFFFFFF;
1394     if (addr & 0xF)
1395         return retval;
1396
1397     addr -= MPIC_EXT_REG_START & (OPENPIC_PAGE_SIZE - 1);
1398     if (addr < MPIC_EXT_REG_SIZE) {
1399         idx += (addr & 0xFFF0) >> 5;
1400         if (addr & 0x10) {
1401             /* EXDE / IFEDE / IEEDE */
1402             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1403         } else {
1404             /* EXVP / IFEVP / IEEVP */
1405             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1406         }
1407         DPRINTF("%s: => %08x\n", __func__, retval);
1408     }
1409
1410     return retval;
1411 }
1412
1413 static void mpic_src_int_write (void *opaque, target_phys_addr_t addr,
1414                                 uint32_t val)
1415 {
1416     openpic_t *mpp = opaque;
1417     int idx = MPIC_INT_IRQ;
1418
1419     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1420     if (addr & 0xF)
1421         return;
1422
1423     addr -= MPIC_INT_REG_START & (OPENPIC_PAGE_SIZE - 1);
1424     if (addr < MPIC_INT_REG_SIZE) {
1425         idx += (addr & 0xFFF0) >> 5;
1426         if (addr & 0x10) {
1427             /* EXDE / IFEDE / IEEDE */
1428             write_IRQreg(mpp, idx, IRQ_IDE, val);
1429         } else {
1430             /* EXVP / IFEVP / IEEVP */
1431             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1432         }
1433     }
1434 }
1435
1436 static uint32_t mpic_src_int_read (void *opaque, target_phys_addr_t addr)
1437 {
1438     openpic_t *mpp = opaque;
1439     uint32_t retval;
1440     int idx = MPIC_INT_IRQ;
1441
1442     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1443     retval = 0xFFFFFFFF;
1444     if (addr & 0xF)
1445         return retval;
1446
1447     addr -= MPIC_INT_REG_START & (OPENPIC_PAGE_SIZE - 1);
1448     if (addr < MPIC_INT_REG_SIZE) {
1449         idx += (addr & 0xFFF0) >> 5;
1450         if (addr & 0x10) {
1451             /* EXDE / IFEDE / IEEDE */
1452             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1453         } else {
1454             /* EXVP / IFEVP / IEEVP */
1455             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1456         }
1457         DPRINTF("%s: => %08x\n", __func__, retval);
1458     }
1459
1460     return retval;
1461 }
1462
1463 static void mpic_src_msg_write (void *opaque, target_phys_addr_t addr,
1464                                 uint32_t val)
1465 {
1466     openpic_t *mpp = opaque;
1467     int idx = MPIC_MSG_IRQ;
1468
1469     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1470     if (addr & 0xF)
1471         return;
1472
1473     addr -= MPIC_MSG_REG_START & (OPENPIC_PAGE_SIZE - 1);
1474     if (addr < MPIC_MSG_REG_SIZE) {
1475         idx += (addr & 0xFFF0) >> 5;
1476         if (addr & 0x10) {
1477             /* EXDE / IFEDE / IEEDE */
1478             write_IRQreg(mpp, idx, IRQ_IDE, val);
1479         } else {
1480             /* EXVP / IFEVP / IEEVP */
1481             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1482         }
1483     }
1484 }
1485
1486 static uint32_t mpic_src_msg_read (void *opaque, target_phys_addr_t addr)
1487 {
1488     openpic_t *mpp = opaque;
1489     uint32_t retval;
1490     int idx = MPIC_MSG_IRQ;
1491
1492     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1493     retval = 0xFFFFFFFF;
1494     if (addr & 0xF)
1495         return retval;
1496
1497     addr -= MPIC_MSG_REG_START & (OPENPIC_PAGE_SIZE - 1);
1498     if (addr < MPIC_MSG_REG_SIZE) {
1499         idx += (addr & 0xFFF0) >> 5;
1500         if (addr & 0x10) {
1501             /* EXDE / IFEDE / IEEDE */
1502             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1503         } else {
1504             /* EXVP / IFEVP / IEEVP */
1505             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1506         }
1507         DPRINTF("%s: => %08x\n", __func__, retval);
1508     }
1509
1510     return retval;
1511 }
1512
1513 static void mpic_src_msi_write (void *opaque, target_phys_addr_t addr,
1514                                 uint32_t val)
1515 {
1516     openpic_t *mpp = opaque;
1517     int idx = MPIC_MSI_IRQ;
1518
1519     DPRINTF("%s: addr " TARGET_FMT_plx " <= %08x\n", __func__, addr, val);
1520     if (addr & 0xF)
1521         return;
1522
1523     addr -= MPIC_MSI_REG_START & (OPENPIC_PAGE_SIZE - 1);
1524     if (addr < MPIC_MSI_REG_SIZE) {
1525         idx += (addr & 0xFFF0) >> 5;
1526         if (addr & 0x10) {
1527             /* EXDE / IFEDE / IEEDE */
1528             write_IRQreg(mpp, idx, IRQ_IDE, val);
1529         } else {
1530             /* EXVP / IFEVP / IEEVP */
1531             write_IRQreg(mpp, idx, IRQ_IPVP, val);
1532         }
1533     }
1534 }
1535 static uint32_t mpic_src_msi_read (void *opaque, target_phys_addr_t addr)
1536 {
1537     openpic_t *mpp = opaque;
1538     uint32_t retval;
1539     int idx = MPIC_MSI_IRQ;
1540
1541     DPRINTF("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
1542     retval = 0xFFFFFFFF;
1543     if (addr & 0xF)
1544         return retval;
1545
1546     addr -= MPIC_MSI_REG_START & (OPENPIC_PAGE_SIZE - 1);
1547     if (addr < MPIC_MSI_REG_SIZE) {
1548         idx += (addr & 0xFFF0) >> 5;
1549         if (addr & 0x10) {
1550             /* EXDE / IFEDE / IEEDE */
1551             retval = read_IRQreg(mpp, idx, IRQ_IDE);
1552         } else {
1553             /* EXVP / IFEVP / IEEVP */
1554             retval = read_IRQreg(mpp, idx, IRQ_IPVP);
1555         }
1556         DPRINTF("%s: => %08x\n", __func__, retval);
1557     }
1558
1559     return retval;
1560 }
1561
1562 static CPUWriteMemoryFunc * const mpic_glb_write[] = {
1563     &openpic_buggy_write,
1564     &openpic_buggy_write,
1565     &openpic_gbl_write,
1566 };
1567
1568 static CPUReadMemoryFunc * const mpic_glb_read[] = {
1569     &openpic_buggy_read,
1570     &openpic_buggy_read,
1571     &openpic_gbl_read,
1572 };
1573
1574 static CPUWriteMemoryFunc * const mpic_tmr_write[] = {
1575     &openpic_buggy_write,
1576     &openpic_buggy_write,
1577     &mpic_timer_write,
1578 };
1579
1580 static CPUReadMemoryFunc * const mpic_tmr_read[] = {
1581     &openpic_buggy_read,
1582     &openpic_buggy_read,
1583     &mpic_timer_read,
1584 };
1585
1586 static CPUWriteMemoryFunc * const mpic_cpu_write[] = {
1587     &openpic_buggy_write,
1588     &openpic_buggy_write,
1589     &openpic_cpu_write,
1590 };
1591
1592 static CPUReadMemoryFunc * const mpic_cpu_read[] = {
1593     &openpic_buggy_read,
1594     &openpic_buggy_read,
1595     &openpic_cpu_read,
1596 };
1597
1598 static CPUWriteMemoryFunc * const mpic_ext_write[] = {
1599     &openpic_buggy_write,
1600     &openpic_buggy_write,
1601     &mpic_src_ext_write,
1602 };
1603
1604 static CPUReadMemoryFunc * const mpic_ext_read[] = {
1605     &openpic_buggy_read,
1606     &openpic_buggy_read,
1607     &mpic_src_ext_read,
1608 };
1609
1610 static CPUWriteMemoryFunc * const mpic_int_write[] = {
1611     &openpic_buggy_write,
1612     &openpic_buggy_write,
1613     &mpic_src_int_write,
1614 };
1615
1616 static CPUReadMemoryFunc * const mpic_int_read[] = {
1617     &openpic_buggy_read,
1618     &openpic_buggy_read,
1619     &mpic_src_int_read,
1620 };
1621
1622 static CPUWriteMemoryFunc * const mpic_msg_write[] = {
1623     &openpic_buggy_write,
1624     &openpic_buggy_write,
1625     &mpic_src_msg_write,
1626 };
1627
1628 static CPUReadMemoryFunc * const mpic_msg_read[] = {
1629     &openpic_buggy_read,
1630     &openpic_buggy_read,
1631     &mpic_src_msg_read,
1632 };
1633 static CPUWriteMemoryFunc * const mpic_msi_write[] = {
1634     &openpic_buggy_write,
1635     &openpic_buggy_write,
1636     &mpic_src_msi_write,
1637 };
1638
1639 static CPUReadMemoryFunc * const mpic_msi_read[] = {
1640     &openpic_buggy_read,
1641     &openpic_buggy_read,
1642     &mpic_src_msi_read,
1643 };
1644
1645 qemu_irq *mpic_init (target_phys_addr_t base, int nb_cpus,
1646                         qemu_irq **irqs, qemu_irq irq_out)
1647 {
1648     openpic_t *mpp;
1649     int i;
1650     struct {
1651         CPUReadMemoryFunc * const *read;
1652         CPUWriteMemoryFunc * const *write;
1653         target_phys_addr_t start_addr;
1654         ram_addr_t size;
1655     } const list[] = {
1656         {mpic_glb_read, mpic_glb_write, MPIC_GLB_REG_START, MPIC_GLB_REG_SIZE},
1657         {mpic_tmr_read, mpic_tmr_write, MPIC_TMR_REG_START, MPIC_TMR_REG_SIZE},
1658         {mpic_ext_read, mpic_ext_write, MPIC_EXT_REG_START, MPIC_EXT_REG_SIZE},
1659         {mpic_int_read, mpic_int_write, MPIC_INT_REG_START, MPIC_INT_REG_SIZE},
1660         {mpic_msg_read, mpic_msg_write, MPIC_MSG_REG_START, MPIC_MSG_REG_SIZE},
1661         {mpic_msi_read, mpic_msi_write, MPIC_MSI_REG_START, MPIC_MSI_REG_SIZE},
1662         {mpic_cpu_read, mpic_cpu_write, MPIC_CPU_REG_START, MPIC_CPU_REG_SIZE},
1663     };
1664
1665     /* XXX: for now, only one CPU is supported */
1666     if (nb_cpus != 1)
1667         return NULL;
1668
1669     mpp = qemu_mallocz(sizeof(openpic_t));
1670
1671     for (i = 0; i < sizeof(list)/sizeof(list[0]); i++) {
1672         int mem_index;
1673
1674         mem_index = cpu_register_io_memory(list[i].read, list[i].write, mpp);
1675         if (mem_index < 0) {
1676             goto free;
1677         }
1678         cpu_register_physical_memory(base + list[i].start_addr,
1679                                      list[i].size, mem_index);
1680     }
1681
1682     mpp->nb_cpus = nb_cpus;
1683     mpp->max_irq = MPIC_MAX_IRQ;
1684     mpp->irq_ipi0 = MPIC_IPI_IRQ;
1685     mpp->irq_tim0 = MPIC_TMR_IRQ;
1686
1687     for (i = 0; i < nb_cpus; i++)
1688         mpp->dst[i].irqs = irqs[i];
1689     mpp->irq_out = irq_out;
1690     mpp->need_swap = 0;    /* MPIC has the same endian as target */
1691
1692     mpp->irq_raise = mpic_irq_raise;
1693     mpp->reset = mpic_reset;
1694
1695     register_savevm(NULL, "mpic", 0, 2, openpic_save, openpic_load, mpp);
1696     qemu_register_reset(mpic_reset, mpp);
1697
1698     return qemu_allocate_irqs(openpic_set_irq, mpp, mpp->max_irq);
1699
1700 free:
1701     qemu_free(mpp);
1702     return NULL;
1703 }