}
PrintDebug("\tPRD Addr: %x, PRD Len: %d, EOT: %d\n",
- prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
+ prd_entry.base_addr,
+ (prd_entry.size == 0) ? 0x10000 : prd_entry.size,
+ prd_entry.end_of_table);
if (prd_entry.end_of_table) {
break;
// loop through the PRD data....
- prd_bytes_left = prd_entry.size;
+ if (prd_entry.size == 0) {
+ // a size of 0 means 64k
+ prd_bytes_left = 0x10000;
+ } else {
+ prd_bytes_left = prd_entry.size;
+ }
while (prd_bytes_left > 0) {
return -1;
}
} else {
- PrintDebug("DMA of command packet\n");
- PrintError("How does this work???\n");
+ /*
+ PrintError("DMA of command packet\n");
+ PrintError("How does this work (ATAPI CMD=%x)???\n", drive->cd_state.atapi_cmd);
return -1;
+ */
+ int cmd_ret = 0;
+
bytes_to_write = (prd_bytes_left > bytes_left) ? bytes_left : prd_bytes_left;
prd_bytes_left = bytes_to_write;
+
+ cmd_ret = v3_write_gpa_memory(core, prd_entry.base_addr + prd_offset,
+ bytes_to_write, drive->data_buf);
+
+ // check cmd_ret
+
+
+ bytes_to_write = 0;
+ prd_bytes_left = 0;
+ drive->transfer_index += bytes_to_write;
+
+ channel->status.busy = 0;
+ channel->status.ready = 1;
+ channel->status.data_req = 0;
+ channel->status.error = 0;
+ channel->status.seek_complete = 1;
+
+ channel->dma_status.active = 0;
+ channel->dma_status.err = 0;
+
+ ide_raise_irq(ide, channel);
+
+ return 0;
}
}
static int read_cd_data(uint8_t * dst, uint_t length, struct ide_internal * ide, struct ide_channel * channel) {
struct ide_drive * drive = get_selected_drive(channel);
int data_offset = drive->transfer_index % ATAPI_BLOCK_SIZE;
- int req_offset = drive->transfer_index % drive->req_len;
+ // int req_offset = drive->transfer_index % drive->req_len;
if (drive->cd_state.atapi_cmd != 0x28) {
PrintDebug("IDE: Reading CD Data (len=%d) (req_len=%d)\n", length, drive->req_len);
+ PrintDebug("IDE: transfer len=%d, transfer idx=%d\n", drive->transfer_length, drive->transfer_index);
}
+
+
if (drive->transfer_index >= drive->transfer_length) {
PrintError("Buffer Overrun... (xfer_len=%d) (cur_idx=%d) (post_idx=%d)\n",
drive->transfer_length, drive->transfer_index,
// Should the req_offset be recalculated here?????
- if ((req_offset == 0) && (drive->transfer_index > 0)) {
+ if (/*(req_offset == 0) &&*/ (drive->transfer_index > 0)) {
if (drive->transfer_index < drive->transfer_length) {
// An increment is complete, but there is still more data to be transferred...
}
} else {
// This was the final read of the request
+
+ drive->req_len = 0;
channel->status.data_req = 0;
channel->status.ready = 1;
struct ide_channel * channel = get_selected_channel(ide, port);
struct ide_drive * drive = get_selected_drive(channel);
- PrintDebug("IDE: Reading Data Port %x (len=%d)\n", port, length);
+ // PrintDebug("IDE: Reading Data Port %x (len=%d)\n", port, length);
if ((channel->cmd_reg == 0xec) ||
(channel->cmd_reg == 0xa1)) {
if (drive->drive_type == BLOCK_CDROM) {
if (read_cd_data((uint8_t *)dst, length, ide, channel) == -1) {
- PrintError("IDE: Could not read CD Data\n");
+ PrintError("IDE: Could not read CD Data (atapi cmd=%x)\n", drive->cd_state.atapi_cmd);
return -1;
}
} else if (drive->drive_type == BLOCK_DISK) {