static void read_sector_done(int which)
{
struct ide_state *ide = &idestate[which];
int lba = lba_address(ide), count = 0;
/* now do the read */
if (ide->disk)
count = hard_disk_read(ide->disk, lba, 1, ide->buffer);
/* by default, mark the buffer ready and the seek complete */
if (!ide->verify_only)
ide->status |= IDE_STATUS_BUFFER_READY;
ide->status |= IDE_STATUS_SEEK_COMPLETE;
/* and clear the busy and error flags */
ide->status &= ~IDE_STATUS_ERROR;
ide->status &= ~IDE_STATUS_BUSY;
/* if we succeeded, advance to the next sector and set the nice bits */
if (count == 1)
{
/* advance the pointers, unless this is the last sector */
/* Gauntlet: Dark Legacy checks to make sure we stop on the last sector */
if (ide->sector_count != 1)
next_sector(ide);
/* clear the error value */
ide->error = IDE_ERROR_NONE;
/* signal an interrupt */
if (!ide->verify_only)
ide->sectors_until_int--;
if (ide->sectors_until_int == 0 || ide->sector_count == 1)
{
ide->sectors_until_int = ((ide->command == IDE_COMMAND_READ_MULTIPLE_BLOCK) ? ide->block_count : 1);
signal_interrupt(ide);
}
/* handle DMA */
if (ide->dma_active)
write_buffer_to_dma(ide);
/* if we're just verifying or if we DMA'ed the data, we can read the next sector */
if (ide->verify_only || ide->dma_active)
continue_read(ide);
}
/* if we got an error, we need to report it */
else
{
/* set the error flag and the error */
ide->status |= IDE_STATUS_ERROR;
ide->error = IDE_ERROR_BAD_SECTOR;
ide->bus_master_status |= IDE_BUSMASTER_STATUS_ERROR;
ide->bus_master_status &= ~IDE_BUSMASTER_STATUS_ACTIVE;
/* signal an interrupt */
signal_interrupt(ide);
}
}
static UINT32 ide_controller_read(struct ide_state *ide, offs_t offset, int size)
{
UINT32 result = 0;
/* logit */
if (offset != IDE_ADDR_DATA && offset != IDE_ADDR_STATUS_COMMAND && offset != IDE_ADDR_STATUS_CONTROL)
LOG(("%08X:IDE read at %03X, size=%d\n", activecpu_get_previouspc(), offset, size));
switch (offset)
{
/* unknown config register */
case IDE_ADDR_CONFIG_UNK:
return ide->config_unknown;
/* active config register */
case IDE_ADDR_CONFIG_REGISTER:
return ide->config_register_num;
/* data from active config register */
case IDE_ADDR_CONFIG_DATA:
if (ide->config_register_num < IDE_CONFIG_REGISTERS)
return ide->config_register[ide->config_register_num];
return 0;
/* read data if there's data to be read */
case IDE_ADDR_DATA:
if (ide->status & IDE_STATUS_BUFFER_READY)
{
/* fetch the correct amount of data */
result = ide->buffer[ide->buffer_offset++];
if (size > 1)
result |= ide->buffer[ide->buffer_offset++] << 8;
if (size > 2)
{
result |= ide->buffer[ide->buffer_offset++] << 16;
result |= ide->buffer[ide->buffer_offset++] << 24;
}
/* if we're at the end of the buffer, handle it */
if (ide->buffer_offset >= IDE_DISK_SECTOR_SIZE)
continue_read(ide);
}
break;
/* return the current error */
case IDE_ADDR_ERROR:
return ide->error;
/* return the current sector count */
case IDE_ADDR_SECTOR_COUNT:
return ide->sector_count;
/* return the current sector */
case IDE_ADDR_SECTOR_NUMBER:
return ide->cur_sector;
/* return the current cylinder LSB */
case IDE_ADDR_CYLINDER_LSB:
return ide->cur_cylinder & 0xff;
/* return the current cylinder MSB */
case IDE_ADDR_CYLINDER_MSB:
return ide->cur_cylinder >> 8;
/* return the current head */
case IDE_ADDR_HEAD_NUMBER:
return ide->cur_head_reg;
/* return the current status and clear any pending interrupts */
case IDE_ADDR_STATUS_COMMAND:
/* return the current status but don't clear interrupts */
case IDE_ADDR_STATUS_CONTROL:
result = ide->status;
if (timer_timeelapsed(ide->last_status_timer) > TIME_PER_ROTATION)
{
result |= IDE_STATUS_HIT_INDEX;
timer_adjust(ide->last_status_timer, TIME_NEVER, 0, 0);
}
/* clear interrutps only when reading the real status */
if (offset == IDE_ADDR_STATUS_COMMAND)
{
if (ide->interrupt_pending)
clear_interrupt(ide);
}
/* take a bit of time to speed up people who poll hard */
activecpu_adjust_icount(-100);
break;
/* log anything else */
default:
logerror("%08X:unknown IDE read at %03X, size=%d\n", activecpu_get_previouspc(), offset, size);
break;
}
/* return the result */
return result;
}