symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/cuda.c
changeset 1 2fb8b9db1c86
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0:ffa851df0825 1:2fb8b9db1c86
       
     1 /*
       
     2  * QEMU PowerMac CUDA device support
       
     3  *
       
     4  * Copyright (c) 2004-2007 Fabrice Bellard
       
     5  * Copyright (c) 2007 Jocelyn Mayer
       
     6  *
       
     7  * Permission is hereby granted, free of charge, to any person obtaining a copy
       
     8  * of this software and associated documentation files (the "Software"), to deal
       
     9  * in the Software without restriction, including without limitation the rights
       
    10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       
    11  * copies of the Software, and to permit persons to whom the Software is
       
    12  * furnished to do so, subject to the following conditions:
       
    13  *
       
    14  * The above copyright notice and this permission notice shall be included in
       
    15  * all copies or substantial portions of the Software.
       
    16  *
       
    17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
       
    18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
       
    19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
       
    20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
       
    21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
       
    22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
       
    23  * THE SOFTWARE.
       
    24  */
       
    25 #include "hw.h"
       
    26 #include "ppc_mac.h"
       
    27 #include "qemu-timer.h"
       
    28 #include "sysemu.h"
       
    29 
       
    30 /* XXX: implement all timer modes */
       
    31 
       
    32 //#define DEBUG_CUDA
       
    33 //#define DEBUG_CUDA_PACKET
       
    34 
       
    35 /* Bits in B data register: all active low */
       
    36 #define TREQ		0x08		/* Transfer request (input) */
       
    37 #define TACK		0x10		/* Transfer acknowledge (output) */
       
    38 #define TIP		0x20		/* Transfer in progress (output) */
       
    39 
       
    40 /* Bits in ACR */
       
    41 #define SR_CTRL		0x1c		/* Shift register control bits */
       
    42 #define SR_EXT		0x0c		/* Shift on external clock */
       
    43 #define SR_OUT		0x10		/* Shift out if 1 */
       
    44 
       
    45 /* Bits in IFR and IER */
       
    46 #define IER_SET		0x80		/* set bits in IER */
       
    47 #define IER_CLR		0		/* clear bits in IER */
       
    48 #define SR_INT		0x04		/* Shift register full/empty */
       
    49 #define T1_INT          0x40            /* Timer 1 interrupt */
       
    50 #define T2_INT          0x20            /* Timer 2 interrupt */
       
    51 
       
    52 /* Bits in ACR */
       
    53 #define T1MODE          0xc0            /* Timer 1 mode */
       
    54 #define T1MODE_CONT     0x40            /*  continuous interrupts */
       
    55 
       
    56 /* commands (1st byte) */
       
    57 #define ADB_PACKET	0
       
    58 #define CUDA_PACKET	1
       
    59 #define ERROR_PACKET	2
       
    60 #define TIMER_PACKET	3
       
    61 #define POWER_PACKET	4
       
    62 #define MACIIC_PACKET	5
       
    63 #define PMU_PACKET	6
       
    64 
       
    65 
       
    66 /* CUDA commands (2nd byte) */
       
    67 #define CUDA_WARM_START			0x0
       
    68 #define CUDA_AUTOPOLL			0x1
       
    69 #define CUDA_GET_6805_ADDR		0x2
       
    70 #define CUDA_GET_TIME			0x3
       
    71 #define CUDA_GET_PRAM			0x7
       
    72 #define CUDA_SET_6805_ADDR		0x8
       
    73 #define CUDA_SET_TIME			0x9
       
    74 #define CUDA_POWERDOWN			0xa
       
    75 #define CUDA_POWERUP_TIME		0xb
       
    76 #define CUDA_SET_PRAM			0xc
       
    77 #define CUDA_MS_RESET			0xd
       
    78 #define CUDA_SEND_DFAC			0xe
       
    79 #define CUDA_BATTERY_SWAP_SENSE		0x10
       
    80 #define CUDA_RESET_SYSTEM		0x11
       
    81 #define CUDA_SET_IPL			0x12
       
    82 #define CUDA_FILE_SERVER_FLAG		0x13
       
    83 #define CUDA_SET_AUTO_RATE		0x14
       
    84 #define CUDA_GET_AUTO_RATE		0x16
       
    85 #define CUDA_SET_DEVICE_LIST		0x19
       
    86 #define CUDA_GET_DEVICE_LIST		0x1a
       
    87 #define CUDA_SET_ONE_SECOND_MODE	0x1b
       
    88 #define CUDA_SET_POWER_MESSAGES		0x21
       
    89 #define CUDA_GET_SET_IIC		0x22
       
    90 #define CUDA_WAKEUP			0x23
       
    91 #define CUDA_TIMER_TICKLE		0x24
       
    92 #define CUDA_COMBINED_FORMAT_IIC	0x25
       
    93 
       
    94 #define CUDA_TIMER_FREQ (4700000 / 6)
       
    95 #define CUDA_ADB_POLL_FREQ 50
       
    96 
       
    97 /* CUDA returns time_t's offset from Jan 1, 1904, not 1970 */
       
    98 #define RTC_OFFSET                      2082844800
       
    99 
       
   100 typedef struct CUDATimer {
       
   101     int index;
       
   102     uint16_t latch;
       
   103     uint16_t counter_value; /* counter value at load time */
       
   104     int64_t load_time;
       
   105     int64_t next_irq_time;
       
   106     QEMUTimer *timer;
       
   107 } CUDATimer;
       
   108 
       
   109 typedef struct CUDAState {
       
   110     /* cuda registers */
       
   111     uint8_t b;      /* B-side data */
       
   112     uint8_t a;      /* A-side data */
       
   113     uint8_t dirb;   /* B-side direction (1=output) */
       
   114     uint8_t dira;   /* A-side direction (1=output) */
       
   115     uint8_t sr;     /* Shift register */
       
   116     uint8_t acr;    /* Auxiliary control register */
       
   117     uint8_t pcr;    /* Peripheral control register */
       
   118     uint8_t ifr;    /* Interrupt flag register */
       
   119     uint8_t ier;    /* Interrupt enable register */
       
   120     uint8_t anh;    /* A-side data, no handshake */
       
   121 
       
   122     CUDATimer timers[2];
       
   123 
       
   124     uint8_t last_b; /* last value of B register */
       
   125     uint8_t last_acr; /* last value of B register */
       
   126 
       
   127     int data_in_size;
       
   128     int data_in_index;
       
   129     int data_out_index;
       
   130 
       
   131     qemu_irq irq;
       
   132     uint8_t autopoll;
       
   133     uint8_t data_in[128];
       
   134     uint8_t data_out[16];
       
   135     QEMUTimer *adb_poll_timer;
       
   136 } CUDAState;
       
   137 
       
   138 static CUDAState cuda_state;
       
   139 ADBBusState adb_bus;
       
   140 
       
   141 static void cuda_update(CUDAState *s);
       
   142 static void cuda_receive_packet_from_host(CUDAState *s,
       
   143                                           const uint8_t *data, int len);
       
   144 static void cuda_timer_update(CUDAState *s, CUDATimer *ti,
       
   145                               int64_t current_time);
       
   146 
       
   147 static void cuda_update_irq(CUDAState *s)
       
   148 {
       
   149     if (s->ifr & s->ier & (SR_INT | T1_INT)) {
       
   150         qemu_irq_raise(s->irq);
       
   151     } else {
       
   152         qemu_irq_lower(s->irq);
       
   153     }
       
   154 }
       
   155 
       
   156 static unsigned int get_counter(CUDATimer *s)
       
   157 {
       
   158     int64_t d;
       
   159     unsigned int counter;
       
   160 
       
   161     d = muldiv64(qemu_get_clock(vm_clock) - s->load_time,
       
   162                  CUDA_TIMER_FREQ, ticks_per_sec);
       
   163     if (s->index == 0) {
       
   164         /* the timer goes down from latch to -1 (period of latch + 2) */
       
   165         if (d <= (s->counter_value + 1)) {
       
   166             counter = (s->counter_value - d) & 0xffff;
       
   167         } else {
       
   168             counter = (d - (s->counter_value + 1)) % (s->latch + 2);
       
   169             counter = (s->latch - counter) & 0xffff;
       
   170         }
       
   171     } else {
       
   172         counter = (s->counter_value - d) & 0xffff;
       
   173     }
       
   174     return counter;
       
   175 }
       
   176 
       
   177 static void set_counter(CUDAState *s, CUDATimer *ti, unsigned int val)
       
   178 {
       
   179 #ifdef DEBUG_CUDA
       
   180     printf("cuda: T%d.counter=%d\n",
       
   181            1 + (ti->timer == NULL), val);
       
   182 #endif
       
   183     ti->load_time = qemu_get_clock(vm_clock);
       
   184     ti->counter_value = val;
       
   185     cuda_timer_update(s, ti, ti->load_time);
       
   186 }
       
   187 
       
   188 static int64_t get_next_irq_time(CUDATimer *s, int64_t current_time)
       
   189 {
       
   190     int64_t d, next_time;
       
   191     unsigned int counter;
       
   192 
       
   193     /* current counter value */
       
   194     d = muldiv64(current_time - s->load_time,
       
   195                  CUDA_TIMER_FREQ, ticks_per_sec);
       
   196     /* the timer goes down from latch to -1 (period of latch + 2) */
       
   197     if (d <= (s->counter_value + 1)) {
       
   198         counter = (s->counter_value - d) & 0xffff;
       
   199     } else {
       
   200         counter = (d - (s->counter_value + 1)) % (s->latch + 2);
       
   201         counter = (s->latch - counter) & 0xffff;
       
   202     }
       
   203 
       
   204     /* Note: we consider the irq is raised on 0 */
       
   205     if (counter == 0xffff) {
       
   206         next_time = d + s->latch + 1;
       
   207     } else if (counter == 0) {
       
   208         next_time = d + s->latch + 2;
       
   209     } else {
       
   210         next_time = d + counter;
       
   211     }
       
   212 #if 0
       
   213 #ifdef DEBUG_CUDA
       
   214     printf("latch=%d counter=%" PRId64 " delta_next=%" PRId64 "\n",
       
   215            s->latch, d, next_time - d);
       
   216 #endif
       
   217 #endif
       
   218     next_time = muldiv64(next_time, ticks_per_sec, CUDA_TIMER_FREQ) +
       
   219         s->load_time;
       
   220     if (next_time <= current_time)
       
   221         next_time = current_time + 1;
       
   222     return next_time;
       
   223 }
       
   224 
       
   225 static void cuda_timer_update(CUDAState *s, CUDATimer *ti,
       
   226                               int64_t current_time)
       
   227 {
       
   228     if (!ti->timer)
       
   229         return;
       
   230     if ((s->acr & T1MODE) != T1MODE_CONT) {
       
   231         qemu_del_timer(ti->timer);
       
   232     } else {
       
   233         ti->next_irq_time = get_next_irq_time(ti, current_time);
       
   234         qemu_mod_timer(ti->timer, ti->next_irq_time);
       
   235     }
       
   236 }
       
   237 
       
   238 static void cuda_timer1(void *opaque)
       
   239 {
       
   240     CUDAState *s = opaque;
       
   241     CUDATimer *ti = &s->timers[0];
       
   242 
       
   243     cuda_timer_update(s, ti, ti->next_irq_time);
       
   244     s->ifr |= T1_INT;
       
   245     cuda_update_irq(s);
       
   246 }
       
   247 
       
   248 static uint32_t cuda_readb(void *opaque, target_phys_addr_t addr)
       
   249 {
       
   250     CUDAState *s = opaque;
       
   251     uint32_t val;
       
   252 
       
   253     addr = (addr >> 9) & 0xf;
       
   254     switch(addr) {
       
   255     case 0:
       
   256         val = s->b;
       
   257         break;
       
   258     case 1:
       
   259         val = s->a;
       
   260         break;
       
   261     case 2:
       
   262         val = s->dirb;
       
   263         break;
       
   264     case 3:
       
   265         val = s->dira;
       
   266         break;
       
   267     case 4:
       
   268         val = get_counter(&s->timers[0]) & 0xff;
       
   269         s->ifr &= ~T1_INT;
       
   270         cuda_update_irq(s);
       
   271         break;
       
   272     case 5:
       
   273         val = get_counter(&s->timers[0]) >> 8;
       
   274         cuda_update_irq(s);
       
   275         break;
       
   276     case 6:
       
   277         val = s->timers[0].latch & 0xff;
       
   278         break;
       
   279     case 7:
       
   280         /* XXX: check this */
       
   281         val = (s->timers[0].latch >> 8) & 0xff;
       
   282         break;
       
   283     case 8:
       
   284         val = get_counter(&s->timers[1]) & 0xff;
       
   285         s->ifr &= ~T2_INT;
       
   286         break;
       
   287     case 9:
       
   288         val = get_counter(&s->timers[1]) >> 8;
       
   289         break;
       
   290     case 10:
       
   291         val = s->sr;
       
   292         s->ifr &= ~SR_INT;
       
   293         cuda_update_irq(s);
       
   294         break;
       
   295     case 11:
       
   296         val = s->acr;
       
   297         break;
       
   298     case 12:
       
   299         val = s->pcr;
       
   300         break;
       
   301     case 13:
       
   302         val = s->ifr;
       
   303         if (s->ifr & s->ier)
       
   304             val |= 0x80;
       
   305         break;
       
   306     case 14:
       
   307         val = s->ier | 0x80;
       
   308         break;
       
   309     default:
       
   310     case 15:
       
   311         val = s->anh;
       
   312         break;
       
   313     }
       
   314 #ifdef DEBUG_CUDA
       
   315     if (addr != 13 || val != 0)
       
   316         printf("cuda: read: reg=0x%x val=%02x\n", addr, val);
       
   317 #endif
       
   318     return val;
       
   319 }
       
   320 
       
   321 static void cuda_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
       
   322 {
       
   323     CUDAState *s = opaque;
       
   324 
       
   325     addr = (addr >> 9) & 0xf;
       
   326 #ifdef DEBUG_CUDA
       
   327     printf("cuda: write: reg=0x%x val=%02x\n", addr, val);
       
   328 #endif
       
   329 
       
   330     switch(addr) {
       
   331     case 0:
       
   332         s->b = val;
       
   333         cuda_update(s);
       
   334         break;
       
   335     case 1:
       
   336         s->a = val;
       
   337         break;
       
   338     case 2:
       
   339         s->dirb = val;
       
   340         break;
       
   341     case 3:
       
   342         s->dira = val;
       
   343         break;
       
   344     case 4:
       
   345         s->timers[0].latch = (s->timers[0].latch & 0xff00) | val;
       
   346         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
       
   347         break;
       
   348     case 5:
       
   349         s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8);
       
   350         s->ifr &= ~T1_INT;
       
   351         set_counter(s, &s->timers[0], s->timers[0].latch);
       
   352         break;
       
   353     case 6:
       
   354         s->timers[0].latch = (s->timers[0].latch & 0xff00) | val;
       
   355         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
       
   356         break;
       
   357     case 7:
       
   358         s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8);
       
   359         s->ifr &= ~T1_INT;
       
   360         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
       
   361         break;
       
   362     case 8:
       
   363         s->timers[1].latch = val;
       
   364         set_counter(s, &s->timers[1], val);
       
   365         break;
       
   366     case 9:
       
   367         set_counter(s, &s->timers[1], (val << 8) | s->timers[1].latch);
       
   368         break;
       
   369     case 10:
       
   370         s->sr = val;
       
   371         break;
       
   372     case 11:
       
   373         s->acr = val;
       
   374         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
       
   375         cuda_update(s);
       
   376         break;
       
   377     case 12:
       
   378         s->pcr = val;
       
   379         break;
       
   380     case 13:
       
   381         /* reset bits */
       
   382         s->ifr &= ~val;
       
   383         cuda_update_irq(s);
       
   384         break;
       
   385     case 14:
       
   386         if (val & IER_SET) {
       
   387             /* set bits */
       
   388             s->ier |= val & 0x7f;
       
   389         } else {
       
   390             /* reset bits */
       
   391             s->ier &= ~val;
       
   392         }
       
   393         cuda_update_irq(s);
       
   394         break;
       
   395     default:
       
   396     case 15:
       
   397         s->anh = val;
       
   398         break;
       
   399     }
       
   400 }
       
   401 
       
   402 /* NOTE: TIP and TREQ are negated */
       
   403 static void cuda_update(CUDAState *s)
       
   404 {
       
   405     int packet_received, len;
       
   406 
       
   407     packet_received = 0;
       
   408     if (!(s->b & TIP)) {
       
   409         /* transfer requested from host */
       
   410 
       
   411         if (s->acr & SR_OUT) {
       
   412             /* data output */
       
   413             if ((s->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
       
   414                 if (s->data_out_index < sizeof(s->data_out)) {
       
   415 #ifdef DEBUG_CUDA
       
   416                     printf("cuda: send: %02x\n", s->sr);
       
   417 #endif
       
   418                     s->data_out[s->data_out_index++] = s->sr;
       
   419                     s->ifr |= SR_INT;
       
   420                     cuda_update_irq(s);
       
   421                 }
       
   422             }
       
   423         } else {
       
   424             if (s->data_in_index < s->data_in_size) {
       
   425                 /* data input */
       
   426                 if ((s->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
       
   427                     s->sr = s->data_in[s->data_in_index++];
       
   428 #ifdef DEBUG_CUDA
       
   429                     printf("cuda: recv: %02x\n", s->sr);
       
   430 #endif
       
   431                     /* indicate end of transfer */
       
   432                     if (s->data_in_index >= s->data_in_size) {
       
   433                         s->b = (s->b | TREQ);
       
   434                     }
       
   435                     s->ifr |= SR_INT;
       
   436                     cuda_update_irq(s);
       
   437                 }
       
   438             }
       
   439         }
       
   440     } else {
       
   441         /* no transfer requested: handle sync case */
       
   442         if ((s->last_b & TIP) && (s->b & TACK) != (s->last_b & TACK)) {
       
   443             /* update TREQ state each time TACK change state */
       
   444             if (s->b & TACK)
       
   445                 s->b = (s->b | TREQ);
       
   446             else
       
   447                 s->b = (s->b & ~TREQ);
       
   448             s->ifr |= SR_INT;
       
   449             cuda_update_irq(s);
       
   450         } else {
       
   451             if (!(s->last_b & TIP)) {
       
   452                 /* handle end of host to cuda transfer */
       
   453                 packet_received = (s->data_out_index > 0);
       
   454                 /* always an IRQ at the end of transfer */
       
   455                 s->ifr |= SR_INT;
       
   456                 cuda_update_irq(s);
       
   457             }
       
   458             /* signal if there is data to read */
       
   459             if (s->data_in_index < s->data_in_size) {
       
   460                 s->b = (s->b & ~TREQ);
       
   461             }
       
   462         }
       
   463     }
       
   464 
       
   465     s->last_acr = s->acr;
       
   466     s->last_b = s->b;
       
   467 
       
   468     /* NOTE: cuda_receive_packet_from_host() can call cuda_update()
       
   469        recursively */
       
   470     if (packet_received) {
       
   471         len = s->data_out_index;
       
   472         s->data_out_index = 0;
       
   473         cuda_receive_packet_from_host(s, s->data_out, len);
       
   474     }
       
   475 }
       
   476 
       
   477 static void cuda_send_packet_to_host(CUDAState *s,
       
   478                                      const uint8_t *data, int len)
       
   479 {
       
   480 #ifdef DEBUG_CUDA_PACKET
       
   481     {
       
   482         int i;
       
   483         printf("cuda_send_packet_to_host:\n");
       
   484         for(i = 0; i < len; i++)
       
   485             printf(" %02x", data[i]);
       
   486         printf("\n");
       
   487     }
       
   488 #endif
       
   489     memcpy(s->data_in, data, len);
       
   490     s->data_in_size = len;
       
   491     s->data_in_index = 0;
       
   492     cuda_update(s);
       
   493     s->ifr |= SR_INT;
       
   494     cuda_update_irq(s);
       
   495 }
       
   496 
       
   497 static void cuda_adb_poll(void *opaque)
       
   498 {
       
   499     CUDAState *s = opaque;
       
   500     uint8_t obuf[ADB_MAX_OUT_LEN + 2];
       
   501     int olen;
       
   502 
       
   503     olen = adb_poll(&adb_bus, obuf + 2);
       
   504     if (olen > 0) {
       
   505         obuf[0] = ADB_PACKET;
       
   506         obuf[1] = 0x40; /* polled data */
       
   507         cuda_send_packet_to_host(s, obuf, olen + 2);
       
   508     }
       
   509     qemu_mod_timer(s->adb_poll_timer,
       
   510                    qemu_get_clock(vm_clock) +
       
   511                    (ticks_per_sec / CUDA_ADB_POLL_FREQ));
       
   512 }
       
   513 
       
   514 static void cuda_receive_packet(CUDAState *s,
       
   515                                 const uint8_t *data, int len)
       
   516 {
       
   517     uint8_t obuf[16];
       
   518     int ti, autopoll;
       
   519 
       
   520     switch(data[0]) {
       
   521     case CUDA_AUTOPOLL:
       
   522         autopoll = (data[1] != 0);
       
   523         if (autopoll != s->autopoll) {
       
   524             s->autopoll = autopoll;
       
   525             if (autopoll) {
       
   526                 qemu_mod_timer(s->adb_poll_timer,
       
   527                                qemu_get_clock(vm_clock) +
       
   528                                (ticks_per_sec / CUDA_ADB_POLL_FREQ));
       
   529             } else {
       
   530                 qemu_del_timer(s->adb_poll_timer);
       
   531             }
       
   532         }
       
   533         obuf[0] = CUDA_PACKET;
       
   534         obuf[1] = data[1];
       
   535         cuda_send_packet_to_host(s, obuf, 2);
       
   536         break;
       
   537     case CUDA_GET_TIME:
       
   538     case CUDA_SET_TIME:
       
   539         /* XXX: add time support ? */
       
   540         ti = time(NULL) + RTC_OFFSET;
       
   541         obuf[0] = CUDA_PACKET;
       
   542         obuf[1] = 0;
       
   543         obuf[2] = 0;
       
   544         obuf[3] = ti >> 24;
       
   545         obuf[4] = ti >> 16;
       
   546         obuf[5] = ti >> 8;
       
   547         obuf[6] = ti;
       
   548         cuda_send_packet_to_host(s, obuf, 7);
       
   549         break;
       
   550     case CUDA_FILE_SERVER_FLAG:
       
   551     case CUDA_SET_DEVICE_LIST:
       
   552     case CUDA_SET_AUTO_RATE:
       
   553     case CUDA_SET_POWER_MESSAGES:
       
   554         obuf[0] = CUDA_PACKET;
       
   555         obuf[1] = 0;
       
   556         cuda_send_packet_to_host(s, obuf, 2);
       
   557         break;
       
   558     case CUDA_POWERDOWN:
       
   559         obuf[0] = CUDA_PACKET;
       
   560         obuf[1] = 0;
       
   561         cuda_send_packet_to_host(s, obuf, 2);
       
   562 	qemu_system_shutdown_request();
       
   563 	break;
       
   564     case CUDA_RESET_SYSTEM:
       
   565         obuf[0] = CUDA_PACKET;
       
   566         obuf[1] = 0;
       
   567         cuda_send_packet_to_host(s, obuf, 2);
       
   568         qemu_system_reset_request();
       
   569         break;
       
   570     default:
       
   571         break;
       
   572     }
       
   573 }
       
   574 
       
   575 static void cuda_receive_packet_from_host(CUDAState *s,
       
   576                                           const uint8_t *data, int len)
       
   577 {
       
   578 #ifdef DEBUG_CUDA_PACKET
       
   579     {
       
   580         int i;
       
   581         printf("cuda_receive_packet_from_host:\n");
       
   582         for(i = 0; i < len; i++)
       
   583             printf(" %02x", data[i]);
       
   584         printf("\n");
       
   585     }
       
   586 #endif
       
   587     switch(data[0]) {
       
   588     case ADB_PACKET:
       
   589         {
       
   590             uint8_t obuf[ADB_MAX_OUT_LEN + 2];
       
   591             int olen;
       
   592             olen = adb_request(&adb_bus, obuf + 2, data + 1, len - 1);
       
   593             if (olen > 0) {
       
   594                 obuf[0] = ADB_PACKET;
       
   595                 obuf[1] = 0x00;
       
   596             } else {
       
   597                 /* error */
       
   598                 obuf[0] = ADB_PACKET;
       
   599                 obuf[1] = -olen;
       
   600                 olen = 0;
       
   601             }
       
   602             cuda_send_packet_to_host(s, obuf, olen + 2);
       
   603         }
       
   604         break;
       
   605     case CUDA_PACKET:
       
   606         cuda_receive_packet(s, data + 1, len - 1);
       
   607         break;
       
   608     }
       
   609 }
       
   610 
       
   611 static void cuda_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
       
   612 {
       
   613 }
       
   614 
       
   615 static void cuda_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
       
   616 {
       
   617 }
       
   618 
       
   619 static uint32_t cuda_readw (void *opaque, target_phys_addr_t addr)
       
   620 {
       
   621     return 0;
       
   622 }
       
   623 
       
   624 static uint32_t cuda_readl (void *opaque, target_phys_addr_t addr)
       
   625 {
       
   626     return 0;
       
   627 }
       
   628 
       
   629 static CPUWriteMemoryFunc *cuda_write[] = {
       
   630     &cuda_writeb,
       
   631     &cuda_writew,
       
   632     &cuda_writel,
       
   633 };
       
   634 
       
   635 static CPUReadMemoryFunc *cuda_read[] = {
       
   636     &cuda_readb,
       
   637     &cuda_readw,
       
   638     &cuda_readl,
       
   639 };
       
   640 
       
   641 void cuda_init (int *cuda_mem_index, qemu_irq irq)
       
   642 {
       
   643     CUDAState *s = &cuda_state;
       
   644 
       
   645     s->irq = irq;
       
   646 
       
   647     s->timers[0].index = 0;
       
   648     s->timers[0].timer = qemu_new_timer(vm_clock, cuda_timer1, s);
       
   649     s->timers[0].latch = 0xffff;
       
   650     set_counter(s, &s->timers[0], 0xffff);
       
   651 
       
   652     s->timers[1].index = 1;
       
   653     s->timers[1].latch = 0;
       
   654     //    s->ier = T1_INT | SR_INT;
       
   655     s->ier = 0;
       
   656     set_counter(s, &s->timers[1], 0xffff);
       
   657 
       
   658     s->adb_poll_timer = qemu_new_timer(vm_clock, cuda_adb_poll, s);
       
   659     *cuda_mem_index = cpu_register_io_memory(0, cuda_read, cuda_write, s);
       
   660 }