hw/ide/macio.c

   1 /*
   2  * QEMU IDE Emulation: MacIO support.
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  * Copyright (c) 2006 Openedhand Ltd.
   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/hw.h>
  26 #include <hw/ppc_mac.h>
  27 #include <hw/mac_dbdma.h>
  28 #include "block.h"
  29 #include "block_int.h"
  30 #include "sysemu.h"
  31 #include "dma.h"
  32
  33 #include <hw/ide/internal.h>
  34
  35 /***********************************************************/
  36 /* MacIO based PowerPC IDE */
  37
  38 typedef struct MACIOIDEState {
  39     IDEBus bus;
  40     BlockDriverAIOCB *aiocb;
  41 } MACIOIDEState;
  42
  43 static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
  44 {
  45     DBDMA_io *io = opaque;
  46     MACIOIDEState *m = io->opaque;
  47     IDEState *s = idebus_active_if(&m->bus);
  48
  49     if (ret < 0) {
  50         m->aiocb = NULL;
  51         qemu_sglist_destroy(&s->sg);
  52         ide_atapi_io_error(s, ret);
  53         io->dma_end(opaque);
  54         return;
  55     }
  56
  57     if (s->io_buffer_size > 0) {
  58         m->aiocb = NULL;
  59         qemu_sglist_destroy(&s->sg);
  60
  61         s->packet_transfer_size -= s->io_buffer_size;
  62
  63         s->io_buffer_index += s->io_buffer_size;
  64         s->lba += s->io_buffer_index >> 11;
  65         s->io_buffer_index &= 0x7ff;
  66     }
  67
  68     if (s->packet_transfer_size <= 0)
  69         ide_atapi_cmd_ok(s);
  70
  71     if (io->len == 0) {
  72         io->dma_end(opaque);
  73         return;
  74     }
  75
  76     /* launch next transfer */
  77
  78     s->io_buffer_size = io->len;
  79
  80     qemu_sglist_init(&s->sg, io->len / TARGET_PAGE_SIZE + 1);
  81     qemu_sglist_add(&s->sg, io->addr, io->len);
  82     io->addr += io->len;
  83     io->len = 0;
  84
  85     m->aiocb = dma_bdrv_read(s->bs, &s->sg,
  86                              (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9),
  87                              pmac_ide_atapi_transfer_cb, io);
  88     if (!m->aiocb) {
  89         qemu_sglist_destroy(&s->sg);
  90         /* Note: media not present is the most likely case */
  91         ide_atapi_cmd_error(s, SENSE_NOT_READY,
  92                             ASC_MEDIUM_NOT_PRESENT);
  93         io->dma_end(opaque);
  94         return;
  95     }
  96 }
  97
  98 static void pmac_ide_transfer_cb(void *opaque, int ret)
  99 {
 100     DBDMA_io *io = opaque;
 101     MACIOIDEState *m = io->opaque;
 102     IDEState *s = idebus_active_if(&m->bus);
 103     int n;
 104     int64_t sector_num;
 105
 106     if (ret < 0) {
 107         m->aiocb = NULL;
 108         qemu_sglist_destroy(&s->sg);
 109         ide_dma_error(s);
 110         io->dma_end(io);
 111         return;
 112     }
 113
 114     sector_num = ide_get_sector(s);
 115     if (s->io_buffer_size > 0) {
 116         m->aiocb = NULL;
 117         qemu_sglist_destroy(&s->sg);
 118         n = (s->io_buffer_size + 0x1ff) >> 9;
 119         sector_num += n;
 120         ide_set_sector(s, sector_num);
 121         s->nsector -= n;
 122     }
 123
 124     /* end of transfer ? */
 125     if (s->nsector == 0) {
 126         s->status = READY_STAT | SEEK_STAT;
 127         ide_set_irq(s->bus);
 128     }
 129
 130     /* end of DMA ? */
 131
 132     if (io->len == 0) {
 133         io->dma_end(io);
 134         return;
 135     }
 136
 137     /* launch next transfer */
 138
 139     s->io_buffer_index = 0;
 140     s->io_buffer_size = io->len;
 141
 142     qemu_sglist_init(&s->sg, io->len / TARGET_PAGE_SIZE + 1);
 143     qemu_sglist_add(&s->sg, io->addr, io->len);
 144     io->addr += io->len;
 145     io->len = 0;
 146
 147     if (s->is_read)
 148         m->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num,
 149                                  pmac_ide_transfer_cb, io);
 150     else
 151         m->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num,
 152                                   pmac_ide_transfer_cb, io);
 153     if (!m->aiocb)
 154         pmac_ide_transfer_cb(io, -1);
 155 }
 156
 157 static void pmac_ide_transfer(DBDMA_io *io)
 158 {
 159     MACIOIDEState *m = io->opaque;
 160     IDEState *s = idebus_active_if(&m->bus);
 161
 162     s->io_buffer_size = 0;
 163     if (s->is_cdrom) {
 164         pmac_ide_atapi_transfer_cb(io, 0);
 165         return;
 166     }
 167
 168     pmac_ide_transfer_cb(io, 0);
 169 }
 170
 171 static void pmac_ide_flush(DBDMA_io *io)
 172 {
 173     MACIOIDEState *m = io->opaque;
 174
 175     if (m->aiocb)
 176         qemu_aio_flush();
 177 }
 178
 179 /* PowerMac IDE memory IO */
 180 static void pmac_ide_writeb (void *opaque,
 181                              target_phys_addr_t addr, uint32_t val)
 182 {
 183     MACIOIDEState *d = opaque;
 184
 185     addr = (addr & 0xFFF) >> 4;
 186     switch (addr) {
 187     case 1 ... 7:
 188         ide_ioport_write(&d->bus, addr, val);
 189         break;
 190     case 8:
 191     case 22:
 192         ide_cmd_write(&d->bus, 0, val);
 193         break;
 194     default:
 195         break;
 196     }
 197 }
 198
 199 static uint32_t pmac_ide_readb (void *opaque,target_phys_addr_t addr)
 200 {
 201     uint8_t retval;
 202     MACIOIDEState *d = opaque;
 203
 204     addr = (addr & 0xFFF) >> 4;
 205     switch (addr) {
 206     case 1 ... 7:
 207         retval = ide_ioport_read(&d->bus, addr);
 208         break;
 209     case 8:
 210     case 22:
 211         retval = ide_status_read(&d->bus, 0);
 212         break;
 213     default:
 214         retval = 0xFF;
 215         break;
 216     }
 217     return retval;
 218 }
 219
 220 static void pmac_ide_writew (void *opaque,
 221                              target_phys_addr_t addr, uint32_t val)
 222 {
 223     MACIOIDEState *d = opaque;
 224
 225     addr = (addr & 0xFFF) >> 4;
 226 #ifdef TARGET_WORDS_BIGENDIAN
 227     val = bswap16(val);
 228 #endif
 229     if (addr == 0) {
 230         ide_data_writew(&d->bus, 0, val);
 231     }
 232 }
 233
 234 static uint32_t pmac_ide_readw (void *opaque,target_phys_addr_t addr)
 235 {
 236     uint16_t retval;
 237     MACIOIDEState *d = opaque;
 238
 239     addr = (addr & 0xFFF) >> 4;
 240     if (addr == 0) {
 241         retval = ide_data_readw(&d->bus, 0);
 242     } else {
 243         retval = 0xFFFF;
 244     }
 245 #ifdef TARGET_WORDS_BIGENDIAN
 246     retval = bswap16(retval);
 247 #endif
 248     return retval;
 249 }
 250
 251 static void pmac_ide_writel (void *opaque,
 252                              target_phys_addr_t addr, uint32_t val)
 253 {
 254     MACIOIDEState *d = opaque;
 255
 256     addr = (addr & 0xFFF) >> 4;
 257 #ifdef TARGET_WORDS_BIGENDIAN
 258     val = bswap32(val);
 259 #endif
 260     if (addr == 0) {
 261         ide_data_writel(&d->bus, 0, val);
 262     }
 263 }
 264
 265 static uint32_t pmac_ide_readl (void *opaque,target_phys_addr_t addr)
 266 {
 267     uint32_t retval;
 268     MACIOIDEState *d = opaque;
 269
 270     addr = (addr & 0xFFF) >> 4;
 271     if (addr == 0) {
 272         retval = ide_data_readl(&d->bus, 0);
 273     } else {
 274         retval = 0xFFFFFFFF;
 275     }
 276 #ifdef TARGET_WORDS_BIGENDIAN
 277     retval = bswap32(retval);
 278 #endif
 279     return retval;
 280 }
 281
 282 static CPUWriteMemoryFunc * const pmac_ide_write[] = {
 283     pmac_ide_writeb,
 284     pmac_ide_writew,
 285     pmac_ide_writel,
 286 };
 287
 288 static CPUReadMemoryFunc * const pmac_ide_read[] = {
 289     pmac_ide_readb,
 290     pmac_ide_readw,
 291     pmac_ide_readl,
 292 };
 293
 294 static const VMStateDescription vmstate_pmac = {
 295     .name = "ide",
 296     .version_id = 3,
 297     .minimum_version_id = 0,
 298     .minimum_version_id_old = 0,
 299     .fields      = (VMStateField []) {
 300         VMSTATE_IDE_BUS(bus, MACIOIDEState),
 301         VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
 302         VMSTATE_END_OF_LIST()
 303     }
 304 };
 305
 306 static void pmac_ide_reset(void *opaque)
 307 {
 308     MACIOIDEState *d = opaque;
 309
 310     ide_bus_reset(&d->bus);
 311 }
 312
 313 /* hd_table must contain 4 block drivers */
 314 /* PowerMac uses memory mapped registers, not I/O. Return the memory
 315    I/O index to access the ide. */
 316 int pmac_ide_init (DriveInfo **hd_table, qemu_irq irq,
 317                    void *dbdma, int channel, qemu_irq dma_irq)
 318 {
 319     MACIOIDEState *d;
 320     int pmac_ide_memory;
 321
 322     d = qemu_mallocz(sizeof(MACIOIDEState));
 323     ide_init2(&d->bus, hd_table[0], hd_table[1], irq);
 324
 325     if (dbdma)
 326         DBDMA_register_channel(dbdma, channel, dma_irq, pmac_ide_transfer, pmac_ide_flush, d);
 327
 328     pmac_ide_memory = cpu_register_io_memory(pmac_ide_read,
 329                                              pmac_ide_write, d);
 330     vmstate_register(0, &vmstate_pmac, d);
 331     qemu_register_reset(pmac_ide_reset, d);
 332
 333     return pmac_ide_memory;
 334 }