hw/misc/slavio_misc.c

   1 /*
   2  * QEMU Sparc SLAVIO aux io port emulation
   3  *
   4  * Copyright (c) 2005 Fabrice Bellard
   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 #include "qemu/osdep.h"
  26 #include "sysemu/sysemu.h"
  27 #include "hw/sysbus.h"
  28 #include "trace.h"
  29
  30 /*
  31  * This is the auxio port, chip control and system control part of
  32  * chip STP2001 (Slave I/O), also produced as NCR89C105. See
  33  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
  34  *
  35  * This also includes the PMC CPU idle controller.
  36  */
  37
  38 #define TYPE_SLAVIO_MISC "slavio_misc"
  39 #define SLAVIO_MISC(obj) OBJECT_CHECK(MiscState, (obj), TYPE_SLAVIO_MISC)
  40
  41 typedef struct MiscState {
  42     SysBusDevice parent_obj;
  43
  44     MemoryRegion cfg_iomem;
  45     MemoryRegion diag_iomem;
  46     MemoryRegion mdm_iomem;
  47     MemoryRegion led_iomem;
  48     MemoryRegion sysctrl_iomem;
  49     MemoryRegion aux1_iomem;
  50     MemoryRegion aux2_iomem;
  51     qemu_irq irq;
  52     qemu_irq fdc_tc;
  53     uint32_t dummy;
  54     uint8_t config;
  55     uint8_t aux1, aux2;
  56     uint8_t diag, mctrl;
  57     uint8_t sysctrl;
  58     uint16_t leds;
  59 } MiscState;
  60
  61 #define TYPE_APC "apc"
  62 #define APC(obj) OBJECT_CHECK(APCState, (obj), TYPE_APC)
  63
  64 typedef struct APCState {
  65     SysBusDevice parent_obj;
  66
  67     MemoryRegion iomem;
  68     qemu_irq cpu_halt;
  69 } APCState;
  70
  71 #define MISC_SIZE 1
  72 #define LED_SIZE 2
  73 #define SYSCTRL_SIZE 4
  74
  75 #define AUX1_TC        0x02
  76
  77 #define AUX2_PWROFF    0x01
  78 #define AUX2_PWRINTCLR 0x02
  79 #define AUX2_PWRFAIL   0x20
  80
  81 #define CFG_PWRINTEN   0x08
  82
  83 #define SYS_RESET      0x01
  84 #define SYS_RESETSTAT  0x02
  85
  86 static void slavio_misc_update_irq(void *opaque)
  87 {
  88     MiscState *s = opaque;
  89
  90     if ((s->aux2 & AUX2_PWRFAIL) && (s->config & CFG_PWRINTEN)) {
  91         trace_slavio_misc_update_irq_raise();
  92         qemu_irq_raise(s->irq);
  93     } else {
  94         trace_slavio_misc_update_irq_lower();
  95         qemu_irq_lower(s->irq);
  96     }
  97 }
  98
  99 static void slavio_misc_reset(DeviceState *d)
 100 {
 101     MiscState *s = SLAVIO_MISC(d);
 102
 103     // Diagnostic and system control registers not cleared in reset
 104     s->config = s->aux1 = s->aux2 = s->mctrl = 0;
 105 }
 106
 107 static void slavio_set_power_fail(void *opaque, int irq, int power_failing)
 108 {
 109     MiscState *s = opaque;
 110
 111     trace_slavio_set_power_fail(power_failing, s->config);
 112     if (power_failing && (s->config & CFG_PWRINTEN)) {
 113         s->aux2 |= AUX2_PWRFAIL;
 114     } else {
 115         s->aux2 &= ~AUX2_PWRFAIL;
 116     }
 117     slavio_misc_update_irq(s);
 118 }
 119
 120 static void slavio_cfg_mem_writeb(void *opaque, hwaddr addr,
 121                                   uint64_t val, unsigned size)
 122 {
 123     MiscState *s = opaque;
 124
 125     trace_slavio_cfg_mem_writeb(val & 0xff);
 126     s->config = val & 0xff;
 127     slavio_misc_update_irq(s);
 128 }
 129
 130 static uint64_t slavio_cfg_mem_readb(void *opaque, hwaddr addr,
 131                                      unsigned size)
 132 {
 133     MiscState *s = opaque;
 134     uint32_t ret = 0;
 135
 136     ret = s->config;
 137     trace_slavio_cfg_mem_readb(ret);
 138     return ret;
 139 }
 140
 141 static const MemoryRegionOps slavio_cfg_mem_ops = {
 142     .read = slavio_cfg_mem_readb,
 143     .write = slavio_cfg_mem_writeb,
 144     .endianness = DEVICE_NATIVE_ENDIAN,
 145     .valid = {
 146         .min_access_size = 1,
 147         .max_access_size = 1,
 148     },
 149 };
 150
 151 static void slavio_diag_mem_writeb(void *opaque, hwaddr addr,
 152                                    uint64_t val, unsigned size)
 153 {
 154     MiscState *s = opaque;
 155
 156     trace_slavio_diag_mem_writeb(val & 0xff);
 157     s->diag = val & 0xff;
 158 }
 159
 160 static uint64_t slavio_diag_mem_readb(void *opaque, hwaddr addr,
 161                                       unsigned size)
 162 {
 163     MiscState *s = opaque;
 164     uint32_t ret = 0;
 165
 166     ret = s->diag;
 167     trace_slavio_diag_mem_readb(ret);
 168     return ret;
 169 }
 170
 171 static const MemoryRegionOps slavio_diag_mem_ops = {
 172     .read = slavio_diag_mem_readb,
 173     .write = slavio_diag_mem_writeb,
 174     .endianness = DEVICE_NATIVE_ENDIAN,
 175     .valid = {
 176         .min_access_size = 1,
 177         .max_access_size = 1,
 178     },
 179 };
 180
 181 static void slavio_mdm_mem_writeb(void *opaque, hwaddr addr,
 182                                   uint64_t val, unsigned size)
 183 {
 184     MiscState *s = opaque;
 185
 186     trace_slavio_mdm_mem_writeb(val & 0xff);
 187     s->mctrl = val & 0xff;
 188 }
 189
 190 static uint64_t slavio_mdm_mem_readb(void *opaque, hwaddr addr,
 191                                      unsigned size)
 192 {
 193     MiscState *s = opaque;
 194     uint32_t ret = 0;
 195
 196     ret = s->mctrl;
 197     trace_slavio_mdm_mem_readb(ret);
 198     return ret;
 199 }
 200
 201 static const MemoryRegionOps slavio_mdm_mem_ops = {
 202     .read = slavio_mdm_mem_readb,
 203     .write = slavio_mdm_mem_writeb,
 204     .endianness = DEVICE_NATIVE_ENDIAN,
 205     .valid = {
 206         .min_access_size = 1,
 207         .max_access_size = 1,
 208     },
 209 };
 210
 211 static void slavio_aux1_mem_writeb(void *opaque, hwaddr addr,
 212                                    uint64_t val, unsigned size)
 213 {
 214     MiscState *s = opaque;
 215
 216     trace_slavio_aux1_mem_writeb(val & 0xff);
 217     if (val & AUX1_TC) {
 218         // Send a pulse to floppy terminal count line
 219         if (s->fdc_tc) {
 220             qemu_irq_raise(s->fdc_tc);
 221             qemu_irq_lower(s->fdc_tc);
 222         }
 223         val &= ~AUX1_TC;
 224     }
 225     s->aux1 = val & 0xff;
 226 }
 227
 228 static uint64_t slavio_aux1_mem_readb(void *opaque, hwaddr addr,
 229                                       unsigned size)
 230 {
 231     MiscState *s = opaque;
 232     uint32_t ret = 0;
 233
 234     ret = s->aux1;
 235     trace_slavio_aux1_mem_readb(ret);
 236     return ret;
 237 }
 238
 239 static const MemoryRegionOps slavio_aux1_mem_ops = {
 240     .read = slavio_aux1_mem_readb,
 241     .write = slavio_aux1_mem_writeb,
 242     .endianness = DEVICE_NATIVE_ENDIAN,
 243     .valid = {
 244         .min_access_size = 1,
 245         .max_access_size = 1,
 246     },
 247 };
 248
 249 static void slavio_aux2_mem_writeb(void *opaque, hwaddr addr,
 250                                    uint64_t val, unsigned size)
 251 {
 252     MiscState *s = opaque;
 253
 254     val &= AUX2_PWRINTCLR | AUX2_PWROFF;
 255     trace_slavio_aux2_mem_writeb(val & 0xff);
 256     val |= s->aux2 & AUX2_PWRFAIL;
 257     if (val & AUX2_PWRINTCLR) // Clear Power Fail int
 258         val &= AUX2_PWROFF;
 259     s->aux2 = val;
 260     if (val & AUX2_PWROFF)
 261         qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
 262     slavio_misc_update_irq(s);
 263 }
 264
 265 static uint64_t slavio_aux2_mem_readb(void *opaque, hwaddr addr,
 266                                       unsigned size)
 267 {
 268     MiscState *s = opaque;
 269     uint32_t ret = 0;
 270
 271     ret = s->aux2;
 272     trace_slavio_aux2_mem_readb(ret);
 273     return ret;
 274 }
 275
 276 static const MemoryRegionOps slavio_aux2_mem_ops = {
 277     .read = slavio_aux2_mem_readb,
 278     .write = slavio_aux2_mem_writeb,
 279     .endianness = DEVICE_NATIVE_ENDIAN,
 280     .valid = {
 281         .min_access_size = 1,
 282         .max_access_size = 1,
 283     },
 284 };
 285
 286 static void apc_mem_writeb(void *opaque, hwaddr addr,
 287                            uint64_t val, unsigned size)
 288 {
 289     APCState *s = opaque;
 290
 291     trace_apc_mem_writeb(val & 0xff);
 292     qemu_irq_raise(s->cpu_halt);
 293 }
 294
 295 static uint64_t apc_mem_readb(void *opaque, hwaddr addr,
 296                               unsigned size)
 297 {
 298     uint32_t ret = 0;
 299
 300     trace_apc_mem_readb(ret);
 301     return ret;
 302 }
 303
 304 static const MemoryRegionOps apc_mem_ops = {
 305     .read = apc_mem_readb,
 306     .write = apc_mem_writeb,
 307     .endianness = DEVICE_NATIVE_ENDIAN,
 308     .valid = {
 309         .min_access_size = 1,
 310         .max_access_size = 1,
 311     }
 312 };
 313
 314 static uint64_t slavio_sysctrl_mem_readl(void *opaque, hwaddr addr,
 315                                          unsigned size)
 316 {
 317     MiscState *s = opaque;
 318     uint32_t ret = 0;
 319
 320     switch (addr) {
 321     case 0:
 322         ret = s->sysctrl;
 323         break;
 324     default:
 325         break;
 326     }
 327     trace_slavio_sysctrl_mem_readl(ret);
 328     return ret;
 329 }
 330
 331 static void slavio_sysctrl_mem_writel(void *opaque, hwaddr addr,
 332                                       uint64_t val, unsigned size)
 333 {
 334     MiscState *s = opaque;
 335
 336     trace_slavio_sysctrl_mem_writel(val);
 337     switch (addr) {
 338     case 0:
 339         if (val & SYS_RESET) {
 340             s->sysctrl = SYS_RESETSTAT;
 341             qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 342         }
 343         break;
 344     default:
 345         break;
 346     }
 347 }
 348
 349 static const MemoryRegionOps slavio_sysctrl_mem_ops = {
 350     .read = slavio_sysctrl_mem_readl,
 351     .write = slavio_sysctrl_mem_writel,
 352     .endianness = DEVICE_NATIVE_ENDIAN,
 353     .valid = {
 354         .min_access_size = 4,
 355         .max_access_size = 4,
 356     },
 357 };
 358
 359 static uint64_t slavio_led_mem_readw(void *opaque, hwaddr addr,
 360                                      unsigned size)
 361 {
 362     MiscState *s = opaque;
 363     uint32_t ret = 0;
 364
 365     switch (addr) {
 366     case 0:
 367         ret = s->leds;
 368         break;
 369     default:
 370         break;
 371     }
 372     trace_slavio_led_mem_readw(ret);
 373     return ret;
 374 }
 375
 376 static void slavio_led_mem_writew(void *opaque, hwaddr addr,
 377                                   uint64_t val, unsigned size)
 378 {
 379     MiscState *s = opaque;
 380
 381     trace_slavio_led_mem_writew(val & 0xffff);
 382     switch (addr) {
 383     case 0:
 384         s->leds = val;
 385         break;
 386     default:
 387         break;
 388     }
 389 }
 390
 391 static const MemoryRegionOps slavio_led_mem_ops = {
 392     .read = slavio_led_mem_readw,
 393     .write = slavio_led_mem_writew,
 394     .endianness = DEVICE_NATIVE_ENDIAN,
 395     .valid = {
 396         .min_access_size = 2,
 397         .max_access_size = 2,
 398     },
 399 };
 400
 401 static const VMStateDescription vmstate_misc = {
 402     .name ="slavio_misc",
 403     .version_id = 1,
 404     .minimum_version_id = 1,
 405     .fields = (VMStateField[]) {
 406         VMSTATE_UINT32(dummy, MiscState),
 407         VMSTATE_UINT8(config, MiscState),
 408         VMSTATE_UINT8(aux1, MiscState),
 409         VMSTATE_UINT8(aux2, MiscState),
 410         VMSTATE_UINT8(diag, MiscState),
 411         VMSTATE_UINT8(mctrl, MiscState),
 412         VMSTATE_UINT8(sysctrl, MiscState),
 413         VMSTATE_END_OF_LIST()
 414     }
 415 };
 416
 417 static void apc_init(Object *obj)
 418 {
 419     APCState *s = APC(obj);
 420     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 421
 422     sysbus_init_irq(dev, &s->cpu_halt);
 423
 424     /* Power management (APC) XXX: not a Slavio device */
 425     memory_region_init_io(&s->iomem, obj, &apc_mem_ops, s,
 426                           "apc", MISC_SIZE);
 427     sysbus_init_mmio(dev, &s->iomem);
 428 }
 429
 430 static void slavio_misc_init(Object *obj)
 431 {
 432     DeviceState *dev = DEVICE(obj);
 433     MiscState *s = SLAVIO_MISC(obj);
 434     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 435
 436     sysbus_init_irq(sbd, &s->irq);
 437     sysbus_init_irq(sbd, &s->fdc_tc);
 438
 439     /* 8 bit registers */
 440     /* Slavio control */
 441     memory_region_init_io(&s->cfg_iomem, obj, &slavio_cfg_mem_ops, s,
 442                           "configuration", MISC_SIZE);
 443     sysbus_init_mmio(sbd, &s->cfg_iomem);
 444
 445     /* Diagnostics */
 446     memory_region_init_io(&s->diag_iomem, obj, &slavio_diag_mem_ops, s,
 447                           "diagnostic", MISC_SIZE);
 448     sysbus_init_mmio(sbd, &s->diag_iomem);
 449
 450     /* Modem control */
 451     memory_region_init_io(&s->mdm_iomem, obj, &slavio_mdm_mem_ops, s,
 452                           "modem", MISC_SIZE);
 453     sysbus_init_mmio(sbd, &s->mdm_iomem);
 454
 455     /* 16 bit registers */
 456     /* ss600mp diag LEDs */
 457     memory_region_init_io(&s->led_iomem, obj, &slavio_led_mem_ops, s,
 458                           "leds", LED_SIZE);
 459     sysbus_init_mmio(sbd, &s->led_iomem);
 460
 461     /* 32 bit registers */
 462     /* System control */
 463     memory_region_init_io(&s->sysctrl_iomem, obj, &slavio_sysctrl_mem_ops, s,
 464                           "system-control", SYSCTRL_SIZE);
 465     sysbus_init_mmio(sbd, &s->sysctrl_iomem);
 466
 467     /* AUX 1 (Misc System Functions) */
 468     memory_region_init_io(&s->aux1_iomem, obj, &slavio_aux1_mem_ops, s,
 469                           "misc-system-functions", MISC_SIZE);
 470     sysbus_init_mmio(sbd, &s->aux1_iomem);
 471
 472     /* AUX 2 (Software Powerdown Control) */
 473     memory_region_init_io(&s->aux2_iomem, obj, &slavio_aux2_mem_ops, s,
 474                           "software-powerdown-control", MISC_SIZE);
 475     sysbus_init_mmio(sbd, &s->aux2_iomem);
 476
 477     qdev_init_gpio_in(dev, slavio_set_power_fail, 1);
 478 }
 479
 480 static void slavio_misc_class_init(ObjectClass *klass, void *data)
 481 {
 482     DeviceClass *dc = DEVICE_CLASS(klass);
 483
 484     dc->reset = slavio_misc_reset;
 485     dc->vmsd = &vmstate_misc;
 486 }
 487
 488 static const TypeInfo slavio_misc_info = {
 489     .name          = TYPE_SLAVIO_MISC,
 490     .parent        = TYPE_SYS_BUS_DEVICE,
 491     .instance_size = sizeof(MiscState),
 492     .instance_init = slavio_misc_init,
 493     .class_init    = slavio_misc_class_init,
 494 };
 495
 496 static const TypeInfo apc_info = {
 497     .name          = TYPE_APC,
 498     .parent        = TYPE_SYS_BUS_DEVICE,
 499     .instance_size = sizeof(MiscState),
 500     .instance_init = apc_init,
 501 };
 502
 503 static void slavio_misc_register_types(void)
 504 {
 505     type_register_static(&slavio_misc_info);
 506     type_register_static(&apc_info);
 507 }
 508
 509 type_init(slavio_misc_register_types)