hw/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 #include "hw.h"
  25 #include "sun4m.h"
  26 #include "sysemu.h"
  27
  28 /* debug misc */
  29 //#define DEBUG_MISC
  30
  31 /*
  32  * This is the auxio port, chip control and system control part of
  33  * chip STP2001 (Slave I/O), also produced as NCR89C105. See
  34  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
  35  *
  36  * This also includes the PMC CPU idle controller.
  37  */
  38
  39 #ifdef DEBUG_MISC
  40 #define MISC_DPRINTF(fmt, args...) \
  41 do { printf("MISC: " fmt , ##args); } while (0)
  42 #else
  43 #define MISC_DPRINTF(fmt, args...)
  44 #endif
  45
  46 typedef struct MiscState {
  47     qemu_irq irq;
  48     uint8_t config;
  49     uint8_t aux1, aux2;
  50     uint8_t diag, mctrl;
  51     uint32_t sysctrl;
  52     uint16_t leds;
  53     qemu_irq cpu_halt;
  54     qemu_irq fdc_tc;
  55 } MiscState;
  56
  57 #define MISC_SIZE 1
  58 #define SYSCTRL_SIZE 4
  59 #define LED_MAXADDR 1
  60 #define LED_SIZE (LED_MAXADDR + 1)
  61
  62 #define MISC_MASK 0x0fff0000
  63 #define MISC_LEDS 0x01600000
  64 #define MISC_CFG  0x01800000
  65 #define MISC_DIAG 0x01a00000
  66 #define MISC_MDM  0x01b00000
  67 #define MISC_SYS  0x01f00000
  68
  69 #define AUX1_TC        0x02
  70
  71 #define AUX2_PWROFF    0x01
  72 #define AUX2_PWRINTCLR 0x02
  73 #define AUX2_PWRFAIL   0x20
  74
  75 #define CFG_PWRINTEN   0x08
  76
  77 #define SYS_RESET      0x01
  78 #define SYS_RESETSTAT  0x02
  79
  80 static void slavio_misc_update_irq(void *opaque)
  81 {
  82     MiscState *s = opaque;
  83
  84     if ((s->aux2 & AUX2_PWRFAIL) && (s->config & CFG_PWRINTEN)) {
  85         MISC_DPRINTF("Raise IRQ\n");
  86         qemu_irq_raise(s->irq);
  87     } else {
  88         MISC_DPRINTF("Lower IRQ\n");
  89         qemu_irq_lower(s->irq);
  90     }
  91 }
  92
  93 static void slavio_misc_reset(void *opaque)
  94 {
  95     MiscState *s = opaque;
  96
  97     // Diagnostic and system control registers not cleared in reset
  98     s->config = s->aux1 = s->aux2 = s->mctrl = 0;
  99 }
 100
 101 void slavio_set_power_fail(void *opaque, int power_failing)
 102 {
 103     MiscState *s = opaque;
 104
 105     MISC_DPRINTF("Power fail: %d, config: %d\n", power_failing, s->config);
 106     if (power_failing && (s->config & CFG_PWRINTEN)) {
 107         s->aux2 |= AUX2_PWRFAIL;
 108     } else {
 109         s->aux2 &= ~AUX2_PWRFAIL;
 110     }
 111     slavio_misc_update_irq(s);
 112 }
 113
 114 static void slavio_cfg_mem_writeb(void *opaque, target_phys_addr_t addr,
 115                                   uint32_t val)
 116 {
 117     MiscState *s = opaque;
 118
 119     MISC_DPRINTF("Write config %2.2x\n", val & 0xff);
 120     s->config = val & 0xff;
 121     slavio_misc_update_irq(s);
 122 }
 123
 124 static uint32_t slavio_cfg_mem_readb(void *opaque, target_phys_addr_t addr)
 125 {
 126     MiscState *s = opaque;
 127     uint32_t ret = 0;
 128
 129     ret = s->config;
 130     MISC_DPRINTF("Read config %2.2x\n", ret);
 131     return ret;
 132 }
 133
 134 static CPUReadMemoryFunc *slavio_cfg_mem_read[3] = {
 135     slavio_cfg_mem_readb,
 136     NULL,
 137     NULL,
 138 };
 139
 140 static CPUWriteMemoryFunc *slavio_cfg_mem_write[3] = {
 141     slavio_cfg_mem_writeb,
 142     NULL,
 143     NULL,
 144 };
 145
 146 static void slavio_diag_mem_writeb(void *opaque, target_phys_addr_t addr,
 147                                    uint32_t val)
 148 {
 149     MiscState *s = opaque;
 150
 151     MISC_DPRINTF("Write diag %2.2x\n", val & 0xff);
 152     s->diag = val & 0xff;
 153 }
 154
 155 static uint32_t slavio_diag_mem_readb(void *opaque, target_phys_addr_t addr)
 156 {
 157     MiscState *s = opaque;
 158     uint32_t ret = 0;
 159
 160     ret = s->diag;
 161     MISC_DPRINTF("Read diag %2.2x\n", ret);
 162     return ret;
 163 }
 164
 165 static CPUReadMemoryFunc *slavio_diag_mem_read[3] = {
 166     slavio_diag_mem_readb,
 167     NULL,
 168     NULL,
 169 };
 170
 171 static CPUWriteMemoryFunc *slavio_diag_mem_write[3] = {
 172     slavio_diag_mem_writeb,
 173     NULL,
 174     NULL,
 175 };
 176
 177 static void slavio_mdm_mem_writeb(void *opaque, target_phys_addr_t addr,
 178                                   uint32_t val)
 179 {
 180     MiscState *s = opaque;
 181
 182     MISC_DPRINTF("Write modem control %2.2x\n", val & 0xff);
 183     s->mctrl = val & 0xff;
 184 }
 185
 186 static uint32_t slavio_mdm_mem_readb(void *opaque, target_phys_addr_t addr)
 187 {
 188     MiscState *s = opaque;
 189     uint32_t ret = 0;
 190
 191     ret = s->mctrl;
 192     MISC_DPRINTF("Read modem control %2.2x\n", ret);
 193     return ret;
 194 }
 195
 196 static CPUReadMemoryFunc *slavio_mdm_mem_read[3] = {
 197     slavio_mdm_mem_readb,
 198     NULL,
 199     NULL,
 200 };
 201
 202 static CPUWriteMemoryFunc *slavio_mdm_mem_write[3] = {
 203     slavio_mdm_mem_writeb,
 204     NULL,
 205     NULL,
 206 };
 207
 208 static void slavio_aux1_mem_writeb(void *opaque, target_phys_addr_t addr,
 209                                    uint32_t val)
 210 {
 211     MiscState *s = opaque;
 212
 213     MISC_DPRINTF("Write aux1 %2.2x\n", val & 0xff);
 214     if (val & AUX1_TC) {
 215         // Send a pulse to floppy terminal count line
 216         if (s->fdc_tc) {
 217             qemu_irq_raise(s->fdc_tc);
 218             qemu_irq_lower(s->fdc_tc);
 219         }
 220         val &= ~AUX1_TC;
 221     }
 222     s->aux1 = val & 0xff;
 223 }
 224
 225 static uint32_t slavio_aux1_mem_readb(void *opaque, target_phys_addr_t addr)
 226 {
 227     MiscState *s = opaque;
 228     uint32_t ret = 0;
 229
 230     ret = s->aux1;
 231     MISC_DPRINTF("Read aux1 %2.2x\n", ret);
 232
 233     return ret;
 234 }
 235
 236 static CPUReadMemoryFunc *slavio_aux1_mem_read[3] = {
 237     slavio_aux1_mem_readb,
 238     NULL,
 239     NULL,
 240 };
 241
 242 static CPUWriteMemoryFunc *slavio_aux1_mem_write[3] = {
 243     slavio_aux1_mem_writeb,
 244     NULL,
 245     NULL,
 246 };
 247
 248 static void slavio_aux2_mem_writeb(void *opaque, target_phys_addr_t addr,
 249                                    uint32_t val)
 250 {
 251     MiscState *s = opaque;
 252
 253     val &= AUX2_PWRINTCLR | AUX2_PWROFF;
 254     MISC_DPRINTF("Write aux2 %2.2x\n", val);
 255     val |= s->aux2 & AUX2_PWRFAIL;
 256     if (val & AUX2_PWRINTCLR) // Clear Power Fail int
 257         val &= AUX2_PWROFF;
 258     s->aux2 = val;
 259     if (val & AUX2_PWROFF)
 260         qemu_system_shutdown_request();
 261     slavio_misc_update_irq(s);
 262 }
 263
 264 static uint32_t slavio_aux2_mem_readb(void *opaque, target_phys_addr_t addr)
 265 {
 266     MiscState *s = opaque;
 267     uint32_t ret = 0;
 268
 269     ret = s->aux2;
 270     MISC_DPRINTF("Read aux2 %2.2x\n", ret);
 271
 272     return ret;
 273 }
 274
 275 static CPUReadMemoryFunc *slavio_aux2_mem_read[3] = {
 276     slavio_aux2_mem_readb,
 277     NULL,
 278     NULL,
 279 };
 280
 281 static CPUWriteMemoryFunc *slavio_aux2_mem_write[3] = {
 282     slavio_aux2_mem_writeb,
 283     NULL,
 284     NULL,
 285 };
 286
 287 static void apc_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 288 {
 289     MiscState *s = opaque;
 290
 291     MISC_DPRINTF("Write power management %2.2x\n", val & 0xff);
 292     qemu_irq_raise(s->cpu_halt);
 293 }
 294
 295 static uint32_t apc_mem_readb(void *opaque, target_phys_addr_t addr)
 296 {
 297     uint32_t ret = 0;
 298
 299     MISC_DPRINTF("Read power management %2.2x\n", ret);
 300     return ret;
 301 }
 302
 303 static CPUReadMemoryFunc *apc_mem_read[3] = {
 304     apc_mem_readb,
 305     NULL,
 306     NULL,
 307 };
 308
 309 static CPUWriteMemoryFunc *apc_mem_write[3] = {
 310     apc_mem_writeb,
 311     NULL,
 312     NULL,
 313 };
 314
 315 static uint32_t slavio_sysctrl_mem_readl(void *opaque, target_phys_addr_t addr)
 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     MISC_DPRINTF("Read system control %08x\n", ret);
 328     return ret;
 329 }
 330
 331 static void slavio_sysctrl_mem_writel(void *opaque, target_phys_addr_t addr,
 332                                       uint32_t val)
 333 {
 334     MiscState *s = opaque;
 335
 336     MISC_DPRINTF("Write system control %08x\n", val);
 337     switch (addr) {
 338     case 0:
 339         if (val & SYS_RESET) {
 340             s->sysctrl = SYS_RESETSTAT;
 341             qemu_system_reset_request();
 342         }
 343         break;
 344     default:
 345         break;
 346     }
 347 }
 348
 349 static CPUReadMemoryFunc *slavio_sysctrl_mem_read[3] = {
 350     NULL,
 351     NULL,
 352     slavio_sysctrl_mem_readl,
 353 };
 354
 355 static CPUWriteMemoryFunc *slavio_sysctrl_mem_write[3] = {
 356     NULL,
 357     NULL,
 358     slavio_sysctrl_mem_writel,
 359 };
 360
 361 static uint32_t slavio_led_mem_readw(void *opaque, target_phys_addr_t addr)
 362 {
 363     MiscState *s = opaque;
 364     uint32_t ret = 0;
 365
 366     switch (addr) {
 367     case 0:
 368         ret = s->leds;
 369         break;
 370     default:
 371         break;
 372     }
 373     MISC_DPRINTF("Read diagnostic LED %04x\n", ret);
 374     return ret;
 375 }
 376
 377 static void slavio_led_mem_writew(void *opaque, target_phys_addr_t addr,
 378                                   uint32_t val)
 379 {
 380     MiscState *s = opaque;
 381
 382     MISC_DPRINTF("Write diagnostic LED %04x\n", val & 0xffff);
 383     switch (addr) {
 384     case 0:
 385         s->leds = val;
 386         break;
 387     default:
 388         break;
 389     }
 390 }
 391
 392 static CPUReadMemoryFunc *slavio_led_mem_read[3] = {
 393     NULL,
 394     slavio_led_mem_readw,
 395     NULL,
 396 };
 397
 398 static CPUWriteMemoryFunc *slavio_led_mem_write[3] = {
 399     NULL,
 400     slavio_led_mem_writew,
 401     NULL,
 402 };
 403
 404 static void slavio_misc_save(QEMUFile *f, void *opaque)
 405 {
 406     MiscState *s = opaque;
 407     uint32_t tmp = 0;
 408     uint8_t tmp8;
 409
 410     qemu_put_be32s(f, &tmp); /* ignored, was IRQ.  */
 411     qemu_put_8s(f, &s->config);
 412     qemu_put_8s(f, &s->aux1);
 413     qemu_put_8s(f, &s->aux2);
 414     qemu_put_8s(f, &s->diag);
 415     qemu_put_8s(f, &s->mctrl);
 416     tmp8 = s->sysctrl & 0xff;
 417     qemu_put_8s(f, &tmp8);
 418 }
 419
 420 static int slavio_misc_load(QEMUFile *f, void *opaque, int version_id)
 421 {
 422     MiscState *s = opaque;
 423     uint32_t tmp;
 424     uint8_t tmp8;
 425
 426     if (version_id != 1)
 427         return -EINVAL;
 428
 429     qemu_get_be32s(f, &tmp);
 430     qemu_get_8s(f, &s->config);
 431     qemu_get_8s(f, &s->aux1);
 432     qemu_get_8s(f, &s->aux2);
 433     qemu_get_8s(f, &s->diag);
 434     qemu_get_8s(f, &s->mctrl);
 435     qemu_get_8s(f, &tmp8);
 436     s->sysctrl = (uint32_t)tmp8;
 437     return 0;
 438 }
 439
 440 void *slavio_misc_init(target_phys_addr_t base, target_phys_addr_t power_base,
 441                        target_phys_addr_t aux1_base,
 442                        target_phys_addr_t aux2_base, qemu_irq irq,
 443                        qemu_irq cpu_halt, qemu_irq **fdc_tc)
 444 {
 445     int io;
 446     MiscState *s;
 447
 448     s = qemu_mallocz(sizeof(MiscState));
 449     if (!s)
 450         return NULL;
 451
 452     if (base) {
 453         /* 8 bit registers */
 454
 455         // Slavio control
 456         io = cpu_register_io_memory(0, slavio_cfg_mem_read,
 457                                     slavio_cfg_mem_write, s);
 458         cpu_register_physical_memory(base + MISC_CFG, MISC_SIZE, io);
 459
 460         // Diagnostics
 461         io = cpu_register_io_memory(0, slavio_diag_mem_read,
 462                                     slavio_diag_mem_write, s);
 463         cpu_register_physical_memory(base + MISC_DIAG, MISC_SIZE, io);
 464
 465         // Modem control
 466         io = cpu_register_io_memory(0, slavio_mdm_mem_read,
 467                                     slavio_mdm_mem_write, s);
 468         cpu_register_physical_memory(base + MISC_MDM, MISC_SIZE, io);
 469
 470         /* 16 bit registers */
 471         io = cpu_register_io_memory(0, slavio_led_mem_read,
 472                                     slavio_led_mem_write, s);
 473         /* ss600mp diag LEDs */
 474         cpu_register_physical_memory(base + MISC_LEDS, MISC_SIZE, io);
 475
 476         /* 32 bit registers */
 477         io = cpu_register_io_memory(0, slavio_sysctrl_mem_read,
 478                                     slavio_sysctrl_mem_write, s);
 479         // System control
 480         cpu_register_physical_memory(base + MISC_SYS, SYSCTRL_SIZE, io);
 481     }
 482
 483     // AUX 1 (Misc System Functions)
 484     if (aux1_base) {
 485         io = cpu_register_io_memory(0, slavio_aux1_mem_read,
 486                                     slavio_aux1_mem_write, s);
 487         cpu_register_physical_memory(aux1_base, MISC_SIZE, io);
 488     }
 489
 490     // AUX 2 (Software Powerdown Control)
 491     if (aux2_base) {
 492         io = cpu_register_io_memory(0, slavio_aux2_mem_read,
 493                                     slavio_aux2_mem_write, s);
 494         cpu_register_physical_memory(aux2_base, MISC_SIZE, io);
 495     }
 496
 497     // Power management (APC) XXX: not a Slavio device
 498     if (power_base) {
 499         io = cpu_register_io_memory(0, apc_mem_read, apc_mem_write, s);
 500         cpu_register_physical_memory(power_base, MISC_SIZE, io);
 501     }
 502
 503     s->irq = irq;
 504     s->cpu_halt = cpu_halt;
 505     *fdc_tc = &s->fdc_tc;
 506
 507     register_savevm("slavio_misc", base, 1, slavio_misc_save, slavio_misc_load,
 508                     s);
 509     qemu_register_reset(slavio_misc_reset, s);
 510     slavio_misc_reset(s);
 511
 512     return s;
 513 }