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Annotation of tme/machine/sun2/sun2-bwtwo.c, revision 1.1

1.1     ! root        1: /* $Id: sun2-bwtwo.c,v 1.2 2003/07/29 18:25:17 fredette Exp $ */
        !             2: 
        !             3: /* machine/sun2/sun2-bwtwo.c - Sun2 bwtwo emulation implementation: */
        !             4: 
        !             5: /*
        !             6:  * Copyright (c) 2003 Matt Fredette
        !             7:  * All rights reserved.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms, with or without
        !            10:  * modification, are permitted provided that the following conditions
        !            11:  * are met:
        !            12:  * 1. Redistributions of source code must retain the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer.
        !            14:  * 2. Redistributions in binary form must reproduce the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer in the
        !            16:  *    documentation and/or other materials provided with the distribution.
        !            17:  * 3. All advertising materials mentioning features or use of this software
        !            18:  *    must display the following acknowledgement:
        !            19:  *      This product includes software developed by Matt Fredette.
        !            20:  * 4. The name of the author may not be used to endorse or promote products
        !            21:  *    derived from this software without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            24:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            25:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
        !            26:  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
        !            27:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
        !            28:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
        !            29:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
        !            31:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
        !            32:  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            33:  * POSSIBILITY OF SUCH DAMAGE.
        !            34:  */
        !            35: 
        !            36: #include <tme/common.h>
        !            37: _TME_RCSID("$Id: sun2-bwtwo.c,v 1.2 2003/07/29 18:25:17 fredette Exp $");
        !            38: 
        !            39: /* includes: */
        !            40: #include <tme/machine/sun.h>
        !            41: #include <tme/generic/bus-device.h>
        !            42: #include <tme/generic/fb.h>
        !            43: 
        !            44: /* macros: */
        !            45: 
        !            46: /* screen dimensions: */
        !            47: #define TME_SUN2BW2_LO_WIDTH   (1152)
        !            48: #define TME_SUN2BW2_LO_HEIGHT  (900)
        !            49: #define TME_SUN2BW2_HI_WIDTH   (1024)
        !            50: #define TME_SUN2BW2_HI_HEIGHT  (1024)
        !            51: 
        !            52: /* register offsets and sizes: */
        !            53: #define TME_SUN2BW2_REG_MEM            (0)
        !            54: #define TME_SUN2BW2_SIZ_MEM            (0x20000)
        !            55: #define TME_SUN2BW2_REG_CSR_OBMEM      (0x81800)
        !            56: #define TME_SUN2BW2_REG_CSR_OBIO       (0x20000)
        !            57: #define TME_SUN2BW2_SIZ_CSR            (0x00002)
        !            58: #define TME_SUN2BW2_SIZ_CSR_PAGE       (0x00800)
        !            59: 
        !            60: /* the bits in the Control/Status register: */
        !            61: #define TME_SUN2BW2_CSR_ENABLE_VIDEO   (0x8000)        /* enable video */
        !            62: #define TME_SUN2BW2_CSR_ENABLE_COPY    (0x4000)        /* enable copy mode */
        !            63: #define TME_SUN2BW2_CSR_ENABLE_INT     (0x2000)        /* interrupt enable */
        !            64: #define TME_SUN2BW2_CSR_INT_ACTIVE     (0x1000)        /* interrupt is active */
        !            65: #define TME_SUN2BW2_CSR_JUMPER_B       (0x0800)        /* jumper B */
        !            66: #define TME_SUN2BW2_CSR_JUMPER_A       (0x0400)        /* jumper A */
        !            67: #define TME_SUN2BW2_CSR_JUMPER_COLOR   (0x0200)        /* jumper color */
        !            68: #define TME_SUN2BW2_CSR_JUMPER_HIRES   (0x0100)        /* jumper hires */
        !            69: #define TME_SUN2BW2_CSR_COPYBASE_MASK  (0x007E)        /* copybase mask */
        !            70: 
        !            71: #if 0
        !            72: #define TME_SUN2BW2_DEBUG
        !            73: #endif
        !            74: 
        !            75: /* structures: */
        !            76: 
        !            77: /* the card: */
        !            78: struct tme_sun2bw2 {
        !            79: 
        !            80:   /* our simple bus device header: */
        !            81:   struct tme_bus_device tme_sun2bw2_device;
        !            82: #define tme_sun2bw2_element tme_sun2bw2_device.tme_bus_device_element
        !            83: 
        !            84:   /* the mutex protecting the card: */
        !            85:   tme_mutex_t tme_sun2bw2_mutex;
        !            86: 
        !            87:   /* the rwlock protecting the card: */
        !            88:   tme_rwlock_t tme_sun2bw2_rwlock;
        !            89: 
        !            90:   /* the framebuffer connection: */
        !            91:   struct tme_fb_connection *tme_sun2bw2_fb_connection;
        !            92: 
        !            93:   /* if our interrupt line is currently asserted: */
        !            94:   int tme_sun2bw2_int_asserted;
        !            95: 
        !            96:   /* the (relative) bus address of our csr register: */
        !            97:   tme_bus_addr_t tme_sun2bw2_csr_address;
        !            98: 
        !            99:   /* the (relative) bus address of the first byte after displayed
        !           100:      framebuffer memory: */
        !           101:   tme_bus_addr_t tme_sun2bw2_end_address;
        !           102: 
        !           103:   /* the framebuffer memory: */
        !           104:   tme_uint8_t *tme_sun2bw2_fb_memory;
        !           105: 
        !           106:   /* any pad memory: */
        !           107:   tme_uint8_t *tme_sun2bw2_pad_memory;
        !           108: 
        !           109:   /* our csr: */
        !           110:   tme_uint16_t tme_sun2bw2_csr;
        !           111: };
        !           112: 
        !           113: /* globals: */
        !           114: 
        !           115: static const struct tme_bus_subregion _tme_sun2bw2_subregion_csr_obmem = {
        !           116:   TME_SUN2BW2_REG_CSR_OBMEM,
        !           117:   TME_SUN2BW2_REG_CSR_OBMEM
        !           118:   + TME_SUN2BW2_SIZ_CSR_PAGE
        !           119:   - 1,
        !           120:   NULL };
        !           121: static const struct tme_bus_subregion _tme_sun2bw2_subregion_csr_obio = {
        !           122:   TME_SUN2BW2_REG_CSR_OBIO,
        !           123:   TME_SUN2BW2_REG_CSR_OBIO
        !           124:   + TME_SUN2BW2_SIZ_CSR_PAGE
        !           125:   - 1,
        !           126:   NULL };
        !           127: 
        !           128: #ifdef TME_SUN2BW2_DEBUG
        !           129: static int
        !           130: _tme_sun2bw2_update_debug(struct tme_fb_connection *conn_fb)
        !           131: {
        !           132:   struct tme_sun2bw2 *sun2bw2;
        !           133:   static int y = -1;
        !           134:   static int x;
        !           135:   unsigned long pixel;
        !           136:   unsigned int pixel_byte;
        !           137:   tme_uint8_t pixel_bit;
        !           138:   int box, box_y, box_x;
        !           139: 
        !           140:   sun2bw2 = conn_fb->tme_fb_connection.tme_connection_element->tme_element_private;
        !           141: 
        !           142:   for (box = 0; box < 2; box++) {
        !           143:     if (y < 0) {
        !           144:       y = 16;
        !           145:       x = 0;
        !           146:       continue;
        !           147:     }
        !           148:     for (box_y = 0; box_y < 2; box_y++) {
        !           149:       for (box_x = 0; box_x < 2; box_x++) {
        !           150:        pixel = (((y + box_y)
        !           151:                  * TME_SUN2BW2_LO_WIDTH)
        !           152:                 + x
        !           153:                 + box_x);
        !           154:        pixel_byte = (pixel / 8);
        !           155:        pixel_bit = (0x80 >> (pixel % 8));
        !           156:        sun2bw2->tme_sun2bw2_fb_memory[pixel_byte] ^= pixel_bit;
        !           157:       }
        !           158:     }
        !           159:     if (box == 0) {
        !           160:       x += 2;
        !           161:       if (x == TME_SUN2BW2_LO_WIDTH) {
        !           162:        x = 0;
        !           163:        y += 2;
        !           164:        if (y == TME_SUN2BW2_LO_HEIGHT) {
        !           165:          y = 0;
        !           166:        }
        !           167:       }
        !           168:     }
        !           169:   }
        !           170:     
        !           171:   return (TME_OK);
        !           172: }
        !           173: #endif /* TME_SUN2BW2_DEBUG */
        !           174: 
        !           175: /* the sun2bw2 framebuffer bus cycle handler: */
        !           176: static int
        !           177: _tme_sun2bw2_bus_cycle_fb(void *_sun2bw2, struct tme_bus_cycle *cycle_init)
        !           178: {
        !           179:   struct tme_sun2bw2 *sun2bw2;
        !           180: 
        !           181:   /* recover our data structure: */
        !           182:   sun2bw2 = (struct tme_sun2bw2 *) _sun2bw2;
        !           183: 
        !           184:   /* lock the mutex: */
        !           185:   tme_mutex_lock(&sun2bw2->tme_sun2bw2_mutex);
        !           186: 
        !           187:   /* run the cycle: */
        !           188:   assert (cycle_init->tme_bus_cycle_address
        !           189:          >= TME_SUN2BW2_REG_MEM);
        !           190:   tme_bus_cycle_xfer_memory(cycle_init, 
        !           191:                            (sun2bw2->tme_sun2bw2_fb_memory
        !           192:                             - TME_SUN2BW2_REG_MEM),
        !           193:                            sun2bw2->tme_sun2bw2_end_address - 1);
        !           194:   
        !           195:   /* unlock the mutex: */
        !           196:   tme_mutex_unlock(&sun2bw2->tme_sun2bw2_mutex);
        !           197: 
        !           198:   /* no faults: */
        !           199:   return (TME_OK);
        !           200: }
        !           201: 
        !           202: /* the sun2bw2 pad bus cycle handler: */
        !           203: static int
        !           204: _tme_sun2bw2_bus_cycle_pad(void *_sun2bw2, struct tme_bus_cycle *cycle_init)
        !           205: {
        !           206:   struct tme_sun2bw2 *sun2bw2;
        !           207: 
        !           208:   /* recover our data structure: */
        !           209:   sun2bw2 = (struct tme_sun2bw2 *) _sun2bw2;
        !           210: 
        !           211:   /* lock the mutex: */
        !           212:   tme_mutex_lock(&sun2bw2->tme_sun2bw2_mutex);
        !           213: 
        !           214:   /* run the cycle: */
        !           215:   assert (cycle_init->tme_bus_cycle_address
        !           216:          >= sun2bw2->tme_sun2bw2_end_address);
        !           217:   assert (sun2bw2->tme_sun2bw2_end_address
        !           218:          < TME_SUN2BW2_SIZ_MEM);
        !           219:   tme_bus_cycle_xfer_memory(cycle_init, 
        !           220:                            (sun2bw2->tme_sun2bw2_pad_memory
        !           221:                             - sun2bw2->tme_sun2bw2_end_address),
        !           222:                            ((TME_SUN2BW2_SIZ_MEM
        !           223:                              - sun2bw2->tme_sun2bw2_end_address)
        !           224:                             - 1));
        !           225: 
        !           226:   /* unlock the mutex: */
        !           227:   tme_mutex_unlock(&sun2bw2->tme_sun2bw2_mutex);
        !           228: 
        !           229:   /* no faults: */
        !           230:   return (TME_OK);
        !           231: }
        !           232: 
        !           233: /* the sun2bw2 CSR bus cycle handler: */
        !           234: static int
        !           235: _tme_sun2bw2_bus_cycle_csr(void *_sun2bw2, struct tme_bus_cycle *cycle_init)
        !           236: {
        !           237:   struct tme_sun2bw2 *sun2bw2;
        !           238:   tme_uint16_t csr_old, csr_new;
        !           239:   tme_bus_addr_t undecoded;
        !           240: 
        !           241:   /* recover our data structure: */
        !           242:   sun2bw2 = (struct tme_sun2bw2 *) _sun2bw2;
        !           243: 
        !           244:   /* lock the mutex: */
        !           245:   tme_mutex_lock(&sun2bw2->tme_sun2bw2_mutex);
        !           246: 
        !           247:   /* get the old CSR value: */
        !           248:   csr_old = tme_betoh_u16(sun2bw2->tme_sun2bw2_csr);
        !           249: 
        !           250:   /* the entire 2KB (one page's) worth of addresses at
        !           251:      tme_sun2bw2_csr_address are all decoded (or, rather, not decoded)
        !           252:      as the CSR: */
        !           253:   undecoded
        !           254:     = (cycle_init->tme_bus_cycle_address
        !           255:        & (TME_SUN2BW2_SIZ_CSR_PAGE - 2));
        !           256:   cycle_init->tme_bus_cycle_address
        !           257:     -= undecoded;
        !           258: 
        !           259:   /* run the cycle: */
        !           260:   assert (cycle_init->tme_bus_cycle_address
        !           261:          >= sun2bw2->tme_sun2bw2_csr_address);
        !           262:   tme_bus_cycle_xfer_memory(cycle_init, 
        !           263:                            (((tme_uint8_t *) &sun2bw2->tme_sun2bw2_csr)
        !           264:                             - sun2bw2->tme_sun2bw2_csr_address),
        !           265:                            (sun2bw2->tme_sun2bw2_csr_address
        !           266:                             + sizeof(sun2bw2->tme_sun2bw2_csr)
        !           267:                             - 1));
        !           268:   cycle_init->tme_bus_cycle_address
        !           269:     += undecoded;
        !           270: 
        !           271:   /* get the new CSR value: */
        !           272:   csr_new = tme_betoh_u16(sun2bw2->tme_sun2bw2_csr);
        !           273: 
        !           274:   /* put back the unchanging bits: */
        !           275:   csr_new
        !           276:     = ((csr_new
        !           277:        & ~(TME_SUN2BW2_CSR_INT_ACTIVE
        !           278:            | TME_SUN2BW2_CSR_JUMPER_B
        !           279:            | TME_SUN2BW2_CSR_JUMPER_A
        !           280:            | TME_SUN2BW2_CSR_JUMPER_COLOR
        !           281:            | TME_SUN2BW2_CSR_JUMPER_HIRES))
        !           282:        | (csr_old
        !           283:          & (TME_SUN2BW2_CSR_INT_ACTIVE
        !           284:             | TME_SUN2BW2_CSR_JUMPER_B
        !           285:             | TME_SUN2BW2_CSR_JUMPER_A
        !           286:             | TME_SUN2BW2_CSR_JUMPER_COLOR
        !           287:             | TME_SUN2BW2_CSR_JUMPER_HIRES)));
        !           288: 
        !           289:   /* we do not support these bits: */
        !           290:   if (csr_new
        !           291:       & (TME_SUN2BW2_CSR_ENABLE_COPY
        !           292:         | TME_SUN2BW2_CSR_ENABLE_INT)) {
        !           293:     abort();
        !           294:   }
        !           295: 
        !           296:   /* set the new CSR value: */
        !           297:   sun2bw2->tme_sun2bw2_csr = tme_htobe_u16(csr_new);
        !           298: 
        !           299:   /* unlock the mutex: */
        !           300:   tme_mutex_unlock(&sun2bw2->tme_sun2bw2_mutex);
        !           301: 
        !           302:   /* no faults: */
        !           303:   return (TME_OK);
        !           304: }
        !           305: 
        !           306: /* the sun2bw2 TLB filler: */
        !           307: static int
        !           308: _tme_sun2bw2_tlb_fill(void *_sun2bw2, struct tme_bus_tlb *tlb, 
        !           309:                      tme_bus_addr_t address, unsigned int cycles)
        !           310: {
        !           311:   struct tme_sun2bw2 *sun2bw2;
        !           312: 
        !           313:   /* recover our data structure: */
        !           314:   sun2bw2 = (struct tme_sun2bw2 *) _sun2bw2;
        !           315: 
        !           316:   /* initialize the TLB entry: */
        !           317:   tme_bus_tlb_initialize(tlb);
        !           318: 
        !           319:   /* if the address falls in the CSR: */
        !           320:   if ((sun2bw2->tme_sun2bw2_csr_address
        !           321:        <= address)
        !           322:       && (address
        !           323:          < (sun2bw2->tme_sun2bw2_csr_address
        !           324:             + TME_SUN2BW2_SIZ_CSR_PAGE))) {
        !           325: 
        !           326:     tlb->tme_bus_tlb_cycle = _tme_sun2bw2_bus_cycle_csr;
        !           327: 
        !           328:     /* this TLB entry covers this range: */
        !           329:     TME_ATOMIC_WRITE(tme_bus_addr_t, 
        !           330:                     tlb->tme_bus_tlb_addr_first,
        !           331:                     sun2bw2->tme_sun2bw2_csr_address);
        !           332:     TME_ATOMIC_WRITE(tme_bus_addr_t, 
        !           333:                     tlb->tme_bus_tlb_addr_last, 
        !           334:                     (sun2bw2->tme_sun2bw2_csr_address
        !           335:                      + TME_SUN2BW2_SIZ_CSR
        !           336:                      - 1));
        !           337: 
        !           338:     /* this TLB entry cannot allow fast reading, since the page the
        !           339:        CSR is on isn't fully decoded - all words on the 2KB page are
        !           340:        the CSR: */
        !           341:   }
        !           342: 
        !           343:   /* if this address falls in the displayed framebuffer memory: */
        !           344:   else if ((TME_SUN2BW2_REG_MEM
        !           345:            <= address)
        !           346:           && (address
        !           347:               < sun2bw2->tme_sun2bw2_end_address)) {
        !           348: 
        !           349:     assert (sun2bw2->tme_sun2bw2_fb_connection != NULL);
        !           350: 
        !           351:     tlb->tme_bus_tlb_cycle = _tme_sun2bw2_bus_cycle_fb;
        !           352: 
        !           353:     /* this TLB entry covers this range: */
        !           354:     TME_ATOMIC_WRITE(tme_bus_addr_t,
        !           355:                     tlb->tme_bus_tlb_addr_first, 
        !           356:                     TME_SUN2BW2_REG_MEM);
        !           357:     TME_ATOMIC_WRITE(tme_bus_addr_t,
        !           358:                     tlb->tme_bus_tlb_addr_last,
        !           359:                     sun2bw2->tme_sun2bw2_end_address);
        !           360: 
        !           361:     /* this TLB entry allows fast reading and writing: */
        !           362:     tlb->tme_bus_tlb_emulator_off_read
        !           363:       = (sun2bw2->tme_sun2bw2_fb_memory
        !           364:         - TME_SUN2BW2_REG_MEM);
        !           365:     tlb->tme_bus_tlb_emulator_off_write
        !           366:       = (sun2bw2->tme_sun2bw2_fb_memory
        !           367:         - TME_SUN2BW2_REG_MEM);
        !           368:   }
        !           369: 
        !           370:   /* if this address falls in the pad memory: */
        !           371:   else if ((sun2bw2->tme_sun2bw2_end_address
        !           372:            <= address)
        !           373:           && (address
        !           374:               < (TME_SUN2BW2_REG_MEM
        !           375:                  + TME_SUN2BW2_SIZ_MEM))) {
        !           376: 
        !           377:     tlb->tme_bus_tlb_cycle = _tme_sun2bw2_bus_cycle_pad;
        !           378: 
        !           379:     /* this TLB entry covers this range: */
        !           380:     TME_ATOMIC_WRITE(tme_bus_addr_t,
        !           381:                     tlb->tme_bus_tlb_addr_first, 
        !           382:                     sun2bw2->tme_sun2bw2_end_address);
        !           383:     TME_ATOMIC_WRITE(tme_bus_addr_t,
        !           384:                     tlb->tme_bus_tlb_addr_last,
        !           385:                     (TME_SUN2BW2_REG_MEM
        !           386:                      + TME_SUN2BW2_SIZ_MEM));
        !           387: 
        !           388:     /* this TLB entry allows fast reading and writing: */
        !           389:     tlb->tme_bus_tlb_emulator_off_read
        !           390:       = (sun2bw2->tme_sun2bw2_pad_memory
        !           391:         - sun2bw2->tme_sun2bw2_end_address);
        !           392:     tlb->tme_bus_tlb_emulator_off_write
        !           393:       = (sun2bw2->tme_sun2bw2_pad_memory
        !           394:         - sun2bw2->tme_sun2bw2_end_address);
        !           395:   }
        !           396: 
        !           397:   /* the fast reading and writing rwlock: */
        !           398:   tlb->tme_bus_tlb_rwlock = &sun2bw2->tme_sun2bw2_rwlock;
        !           399: 
        !           400:   /* allow reading and writing: */
        !           401:   tlb->tme_bus_tlb_cycles_ok = TME_BUS_CYCLE_READ | TME_BUS_CYCLE_WRITE;
        !           402: 
        !           403:   /* our bus cycle handler private data: */
        !           404:   tlb->tme_bus_tlb_cycle_private = _sun2bw2;
        !           405: 
        !           406:   return (TME_OK);
        !           407: }
        !           408: 
        !           409: /* this makes a new framebuffer connection: */
        !           410: static int
        !           411: _tme_sun2bw2_connection_make(struct tme_connection *conn, unsigned int state)
        !           412: {
        !           413:   struct tme_sun2bw2 *sun2bw2;
        !           414:   struct tme_fb_connection *conn_fb;
        !           415:   struct tme_fb_connection *conn_fb_other;
        !           416:   int rc;
        !           417: 
        !           418:   /* recover our data structures: */
        !           419:   sun2bw2 = conn->tme_connection_element->tme_element_private;
        !           420:   conn_fb = (struct tme_fb_connection *) conn;
        !           421:   conn_fb_other = (struct tme_fb_connection *) conn->tme_connection_other;
        !           422: 
        !           423:   /* both sides must be framebuffer connections: */
        !           424:   assert(conn->tme_connection_type == TME_CONNECTION_FRAMEBUFFER);
        !           425:   assert(conn->tme_connection_other->tme_connection_type == TME_CONNECTION_FRAMEBUFFER);
        !           426: 
        !           427:   /* lock our mutex: */
        !           428:   tme_mutex_lock(&sun2bw2->tme_sun2bw2_mutex);
        !           429: 
        !           430:   /* once the connection is made, we know whether or not the other
        !           431:      side of the connection is supplying specific memory that it wants
        !           432:      us to use, or if we should allocate memory ourselves: */
        !           433:   if (conn_fb->tme_fb_connection_buffer == NULL) {
        !           434:     rc = tme_fb_xlat_alloc_src(conn_fb);
        !           435:     assert (rc == TME_OK);
        !           436:     sun2bw2->tme_sun2bw2_fb_memory = conn_fb->tme_fb_connection_buffer;
        !           437:   }
        !           438: 
        !           439:   /* we're always set up to answer calls across the connection, so we
        !           440:      only have to do work when the connection has gone full, namely
        !           441:      taking the other side of the connection: */
        !           442:   if (state == TME_CONNECTION_FULL) {
        !           443: 
        !           444:     /* save our connection: */
        !           445:     sun2bw2->tme_sun2bw2_fb_connection = conn_fb_other;
        !           446:   }
        !           447: 
        !           448:   /* unlock our mutex: */
        !           449:   tme_mutex_unlock(&sun2bw2->tme_sun2bw2_mutex);
        !           450: 
        !           451:   return (TME_OK);
        !           452: }
        !           453: 
        !           454: /* this breaks a connection: */
        !           455: static int
        !           456: _tme_sun2bw2_connection_break(struct tme_connection *conn, unsigned int state)
        !           457: {
        !           458:   abort();
        !           459: }
        !           460: 
        !           461: /* this makes a new connection side for a sun2bw2: */
        !           462: static int
        !           463: _tme_sun2bw2_connections_new(struct tme_element *element,
        !           464:                             const char * const *args,
        !           465:                             struct tme_connection **_conns,
        !           466:                             char **_output)
        !           467: {
        !           468:   struct tme_sun2bw2 *sun2bw2;
        !           469:   struct tme_fb_connection *conn_fb;
        !           470:   struct tme_connection *conn;
        !           471:   int rc;
        !           472: 
        !           473:   /* recover our data structure: */
        !           474:   sun2bw2 = (struct tme_sun2bw2 *) element->tme_element_private;
        !           475: 
        !           476:   /* make the generic bus device connection side: */
        !           477:   rc = tme_bus_device_connections_new(element, args, _conns, _output);
        !           478:   if (rc != TME_OK) {
        !           479:     return (rc);
        !           480:   }
        !           481: 
        !           482:   /* if we don't have a framebuffer connection, make one: */
        !           483:   if (sun2bw2->tme_sun2bw2_fb_connection == NULL) {
        !           484: 
        !           485:     /* allocate the new framebuffer connection: */
        !           486:     conn_fb = tme_new0(struct tme_fb_connection, 1);
        !           487:     conn = &conn_fb->tme_fb_connection;
        !           488:     
        !           489:     /* fill in the generic connection: */
        !           490:     conn->tme_connection_next = *_conns;
        !           491:     conn->tme_connection_type = TME_CONNECTION_FRAMEBUFFER;
        !           492:     conn->tme_connection_score = tme_fb_connection_score;
        !           493:     conn->tme_connection_make = _tme_sun2bw2_connection_make;
        !           494:     conn->tme_connection_break = _tme_sun2bw2_connection_break;
        !           495: 
        !           496:     /* fill in the framebuffer connection: */
        !           497:     conn_fb->tme_fb_connection_mode_change = NULL;
        !           498: #ifdef TME_SUN2BW2_DEBUG
        !           499:     conn_fb->tme_fb_connection_update = _tme_sun2bw2_update_debug;
        !           500: #else  /* !TME_SUN2BW2_DEBUG */ 
        !           501:     conn_fb->tme_fb_connection_update = NULL;
        !           502: #endif /* !TME_SUN2BW2_DEBUG */ 
        !           503: 
        !           504:     /* height and width depend on the hires jumper: */
        !           505:     if (sun2bw2->tme_sun2bw2_csr
        !           506:        & TME_SUN2BW2_CSR_JUMPER_HIRES) {
        !           507:       conn_fb->tme_fb_connection_width = TME_SUN2BW2_HI_WIDTH;
        !           508:       conn_fb->tme_fb_connection_height = TME_SUN2BW2_HI_HEIGHT;
        !           509:     }
        !           510:     else {
        !           511:       conn_fb->tme_fb_connection_width = TME_SUN2BW2_LO_WIDTH;
        !           512:       conn_fb->tme_fb_connection_height = TME_SUN2BW2_LO_HEIGHT;
        !           513:     }
        !           514: 
        !           515:     /* we are monochrome: */
        !           516:     conn_fb->tme_fb_connection_depth = 1;
        !           517:     conn_fb->tme_fb_connection_bits_per_pixel = 1;
        !           518: 
        !           519:     /* we skip no pixels at the start of the scanline: */
        !           520:     conn_fb->tme_fb_connection_skipx = 0;
        !           521: 
        !           522:     /* we pad to 32-bit boundaries: */
        !           523:     conn_fb->tme_fb_connection_scanline_pad = 32;
        !           524: 
        !           525:     /* we are big-endian: */
        !           526:     conn_fb->tme_fb_connection_order = TME_ENDIAN_BIG;
        !           527: 
        !           528:     /* we don't allocate memory until the connection is made, in case
        !           529:        the other side of the connection wants to provide us with a
        !           530:        specific memory region to use (maybe we're on a system with a
        !           531:        real bwtwo and we can write directly to its buffer): */
        !           532:     conn_fb->tme_fb_connection_buffer = NULL;
        !           533: 
        !           534:     /* return the connection side possibility: */
        !           535:     *_conns = conn;
        !           536:   }
        !           537: 
        !           538:   /* done: */
        !           539:   return (TME_OK);
        !           540: }
        !           541: 
        !           542: /* the new _sun2bw2 function: */
        !           543: TME_ELEMENT_SUB_NEW_DECL(tme_machine_sun2,bwtwo) {
        !           544:   struct tme_sun2bw2 *sun2bw2;
        !           545:   struct tme_bus_subregion *subregion;
        !           546:   const char *bw2_type;
        !           547:   int arg_i;
        !           548:   int usage;
        !           549: 
        !           550:   /* check our arguments: */
        !           551:   usage = 0;
        !           552:   bw2_type = NULL;
        !           553:   arg_i = 1;
        !           554:   for (;;) {
        !           555: 
        !           556:     /* the framebuffer type: */
        !           557:     if (TME_ARG_IS(args[arg_i + 0], "type")) {
        !           558:       bw2_type = args[arg_i + 1];
        !           559:       if (bw2_type == NULL
        !           560:          || (strcmp(bw2_type, "obmem")
        !           561:              && strcmp(bw2_type, "obio"))) {
        !           562:        usage = TRUE;
        !           563:        break;
        !           564:       }
        !           565:       arg_i += 2;
        !           566:     }
        !           567: 
        !           568:     /* if we ran out of arguments: */
        !           569:     else if (args[arg_i] == NULL) {
        !           570: 
        !           571:       break;
        !           572:     }
        !           573: 
        !           574:     /* otherwise this is a bad argument: */
        !           575:     else {
        !           576:       tme_output_append_error(_output,
        !           577:                              "%s %s, ",
        !           578:                              args[arg_i],
        !           579:                              _("unexpected"));
        !           580:       usage = TRUE;
        !           581:       break;
        !           582:     }
        !           583:   }
        !           584: 
        !           585:   if (usage) {
        !           586:     tme_output_append_error(_output, 
        !           587:                            "%s %s type { obmem | obio }",
        !           588:                            _("usage:"),
        !           589:                            args[0]);
        !           590:     return (EINVAL);
        !           591:   }
        !           592: 
        !           593:   /* start the sun2bw2 structure: */
        !           594:   sun2bw2 = tme_new0(struct tme_sun2bw2, 1);
        !           595:   sun2bw2->tme_sun2bw2_element = element;
        !           596:   tme_mutex_init(&sun2bw2->tme_sun2bw2_mutex);
        !           597:   tme_rwlock_init(&sun2bw2->tme_sun2bw2_rwlock);
        !           598: 
        !           599:   /* set our initial CSR: */
        !           600:   sun2bw2->tme_sun2bw2_csr
        !           601:     = tme_htobe_u16(TME_SUN2BW2_CSR_ENABLE_VIDEO);
        !           602: 
        !           603:   /* if we're high-resolution: */
        !           604:   if (sun2bw2->tme_sun2bw2_csr
        !           605:       & TME_SUN2BW2_CSR_JUMPER_HIRES) {
        !           606: 
        !           607:     /* set the address after the end of displayed framebuffer memory: */
        !           608:     sun2bw2->tme_sun2bw2_end_address
        !           609:       = (TME_SUN2BW2_REG_MEM
        !           610:         + (TME_SUN2BW2_HI_WIDTH
        !           611:            * TME_SUN2BW2_HI_HEIGHT
        !           612:            / 8));
        !           613: 
        !           614:     /* we don't need any pad memory: */
        !           615:     sun2bw2->tme_sun2bw2_pad_memory = NULL;
        !           616:   }
        !           617: 
        !           618:   /* otherwise, we're low-resolution: */
        !           619:   else {
        !           620: 
        !           621:     /* set the address after the end of displayed framebuffer memory: */
        !           622:     sun2bw2->tme_sun2bw2_end_address
        !           623:       = (TME_SUN2BW2_REG_MEM
        !           624:         + (TME_SUN2BW2_LO_WIDTH
        !           625:            * TME_SUN2BW2_LO_HEIGHT
        !           626:            / 8));
        !           627: 
        !           628:     /* allocate the pad memory: */
        !           629:     sun2bw2->tme_sun2bw2_pad_memory
        !           630:       = tme_new0(tme_uint8_t,
        !           631:                 (TME_SUN2BW2_REG_MEM
        !           632:                  + TME_SUN2BW2_SIZ_MEM
        !           633:                  - sun2bw2->tme_sun2bw2_end_address));
        !           634:   }
        !           635: 
        !           636:   /* initialize our simple bus device descriptor: */
        !           637:   sun2bw2->tme_sun2bw2_device.tme_bus_device_element = element;
        !           638:   sun2bw2->tme_sun2bw2_device.tme_bus_device_tlb_fill = _tme_sun2bw2_tlb_fill;
        !           639:   subregion = &sun2bw2->tme_sun2bw2_device.tme_bus_device_subregions;
        !           640:   subregion->tme_bus_subregion_address_first
        !           641:     = TME_SUN2BW2_REG_MEM;
        !           642:   subregion->tme_bus_subregion_address_last
        !           643:     = TME_SUN2BW2_SIZ_MEM;
        !           644:   subregion->tme_bus_subregion_next
        !           645:     = (!strcmp(bw2_type, "obmem")
        !           646:        ? &_tme_sun2bw2_subregion_csr_obmem
        !           647:        : &_tme_sun2bw2_subregion_csr_obio);
        !           648:   sun2bw2->tme_sun2bw2_csr_address
        !           649:     = subregion->tme_bus_subregion_next->tme_bus_subregion_address_first;
        !           650: 
        !           651:   /* fill the element: */
        !           652:   element->tme_element_private = sun2bw2;
        !           653:   element->tme_element_connections_new = _tme_sun2bw2_connections_new;
        !           654: 
        !           655:   return (TME_OK);
        !           656: }
        !           657: 

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