#include <palacios/vmm.h>
#include <devices/ide.h>
#include "ide-types.h"
+#include "atapi-types.h"
#define PRI_DEFAULT_IRQ 14
#define SEC_DEFAULT_IRQ 15
+
#define PRI_DATA_PORT 0x1f0
#define PRI_FEATURES_PORT 0x1f1
#define PRI_SECT_CNT_PORT 0x1f2
#define SEC_ADDR_REG_PORT 0x377
+#define DATA_BUFFER_SIZE 2048
static const char * ide_dev_type_strs[] = {"HARDDISK", "CDROM", "NONE"};
+struct ide_cd_state {
+ struct atapi_sense_data sense;
+ uint_t current_lba;
+};
+
+struct ide_hd_state {
+};
struct ide_drive {
// Command Registers
};
+ union {
+ struct ide_cd_state cd_state;
+ struct ide_hd_state hd_state;
+ };
+
char model[41];
- uint_t data_offset;
+ // Where we are in the data transfer
+ uint_t transfer_index;
+
+ // the length of a transfer
+ // calculated for easy access
+ uint_t transfer_length;
- // data buffer...
- uint8_t buffer[2048];
+ // We have a local data buffer that we use for IO port accesses
+ uint8_t data_buf[DATA_BUFFER_SIZE];
void * private_data;
- uint8_t sector_count; // 0x1f2,0x172
+ uint8_t sector_count; // 0x1f2,0x172
uint8_t sector_num; // 0x1f3,0x173
union {
uint16_t cylinder;
struct ide_drive_head_reg drive_head; // 0x1f6,0x176
struct ide_status_reg status; // [read] 0x1f7,0x177
- uint8_t command_reg; // [write] 0x1f7,0x177
+ uint8_t cmd_reg; // [write] 0x1f7,0x177
int irq; // this is temporary until we add PCI support
+static inline uint32_t be_to_le_16(const uint16_t val) {
+ uint8_t * buf = (uint8_t *)&val;
+ return (buf[0] << 8) | (buf[1]) ;
+}
+
+
+static inline uint32_t be_to_le_32(const uint32_t val) {
+ uint8_t * buf = (uint8_t *)&val;
+ return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+}
+
static inline int get_channel_index(ushort_t port) {
if (((port & 0xfff8) == 0x1f0) ||
drive->cylinder = 0x0000;
}
+
+ memset(drive->data_buf, 0, sizeof(drive->data_buf));
+ drive->transfer_length = 0;
+ drive->transfer_index = 0;
+
// Send the reset signal to the connected device callbacks
// channel->drives[0].reset();
// channel->drives[1].reset();
channel->error_reg.val = 0x01;
// clear commands
- channel->command_reg = 0x00;
+ channel->cmd_reg = 0x00;
channel->ctrl_reg.irq_disable = 0;
}
return -1;
}
- channel->command_reg = *(uint8_t *)src;
-
-
PrintDebug("IDE: Writing Command Port %x (val=%x)\n", port, *(uint8_t *)src);
-
- switch (channel->command_reg) {
+
+ channel->cmd_reg = *(uint8_t *)src;
+
+ switch (channel->cmd_reg) {
case 0xa0: // ATAPI Command Packet
if (drive->drive_type != IDE_CDROM) {
channel->status.write_fault = 0;
channel->status.data_req = 1;
channel->status.error = 0;
-
- drive->data_offset = 0;
+ // reset the data buffer...
+ drive->transfer_length = ATAPI_PACKET_SIZE;
+ drive->transfer_index = 0;
+
+ break;
case 0xa1: // ATAPI Identify Device Packet
atapi_identify_device(drive);
channel->status.val = 0x58; // ready, data_req, seek_complete
ide_raise_irq(dev, channel);
+ break;
case 0xec: // Identify Device
if (drive->drive_type != IDE_DISK) {
drive_reset(drive);
return -1;
}
break;
-
+ default:
+ PrintError("Unimplemented IDE command (%x)\n", channel->cmd_reg);
+ return -1;
}
- return -1;
+ return length;
}
static int write_data_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
- PrintDebug("IDE: Writing Data Port %x (val=%x)\n", port, *(uint8_t *)src);
- return -1;
+ struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
+ struct ide_channel * channel = get_selected_channel(ide, port);
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ PrintDebug("IDE: Writing Data Port %x (val=%x, len=%d)\n", port, *(uint32_t *)src, length);
+
+ memcpy(drive->data_buf + drive->transfer_index, src, length);
+ drive->transfer_index += length;
+
+ // Transfer is complete, dispatch the command
+ if (drive->transfer_index >= drive->transfer_length) {
+ switch (channel->cmd_reg) {
+ case 0x30: // Write Sectors
+ PrintError("Writing Data not yet implemented\n");
+ return -1;
+
+ case 0xa0: // ATAPI packet command
+ if (atapi_handle_packet(dev, channel) == -1) {
+ PrintError("Error handling ATAPI packet\n");
+ return -1;
+ }
+ break;
+ default:
+ PrintError("Unhandld IDE Command %x\n", channel->cmd_reg);
+ return -1;
+ }
+ }
+
+ return length;
}
static int read_data_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
+ struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
+ struct ide_channel * channel = get_selected_channel(ide, port);
+ struct ide_drive * drive = get_selected_drive(channel);
+ int data_offset = drive->transfer_index % DATA_BUFFER_SIZE;
+
PrintDebug("IDE: Reading Data Port %x\n", port);
- return -1;
+
+ if (data_offset == DATA_BUFFER_SIZE) {
+ // check for more data to transfer, if there isn't any then that's a problem...
+ /*
+ * if (ide_update_buffer(drive) == -1) {
+ * return -1;
+ * }
+ */
+ return -1;
+ }
+
+
+ // check for overruns...
+ // We will return the data padded with 0's
+ if (drive->transfer_index + length > drive->transfer_length) {
+ length = drive->transfer_length - drive->transfer_index;
+ memset(dst, 0, length);
+ }
+
+ memcpy(dst, drive->data_buf + data_offset, length);
+
+ drive->transfer_index += length;
+
+
+ if (drive->transfer_index >= drive->transfer_length) {
+ channel->status.data_req = 0;
+ }
+
+ return length;
}
static int write_port_std(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
drive->drive_type = IDE_NONE;
- drive->data_offset = 0;
memset(drive->model, 0, sizeof(drive->model));
- memset(drive->buffer, 0, sizeof(drive->buffer));
+
+ drive->transfer_index = 0;
+ drive->transfer_length = 0;
+ memset(drive->data_buf, 0, sizeof(drive->data_buf));
drive->private_data = NULL;
drive->cd_ops = NULL;
channel->error_reg.val = 0x01;
channel->drive_head.val = 0x00;
channel->status.val = 0x00;
- channel->command_reg = 0x00;
+ channel->cmd_reg = 0x00;
channel->ctrl_reg.val = 0x08;
