#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 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;
+ uint8_t atapi_cmd;
+ struct atapi_error_recovery err_recovery;
+};
+
+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];
+
+ // Where we are in the data transfer
+ uint_t transfer_index;
+
+ // the length of a transfer
+ // calculated for easy access
+ uint_t transfer_length;
+
+
+ // We have a local data buffer that we use for IO port accesses
+ uint8_t data_buf[DATA_BUFFER_SIZE];
+
+
void * private_data;
+
+ union {
+ uint8_t sector_count; // 0x1f2,0x172
+ struct atapi_irq_flags irq_flags;
+ } __attribute__((packed));
- uint8_t sector_count; // 0x1f2,0x172
uint8_t sector_num; // 0x1f3,0x173
+
union {
uint16_t cylinder;
+
struct {
uint8_t cylinder_low; // 0x1f4,0x174
uint8_t cylinder_high; // 0x1f5,0x175
} __attribute__((packed));
+
+ // The transfer length requested by the CPU
+ uint16_t req_len;
} __attribute__((packed));
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
// Control Registers
struct ide_ctrl_reg ctrl_reg; // [write] 0x3f6,0x376
+static inline uint16_t be_to_le_16(const uint16_t val) {
+ uint8_t * buf = (uint8_t *)&val;
+ return (buf[0] << 8) | (buf[1]) ;
+}
+
+static inline uint16_t le_to_be_16(const uint16_t val) {
+ return be_to_le_16(val);
+}
+
+
+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 uint32_t le_to_be_32(const uint32_t val) {
+ return be_to_le_32(val);
+}
+
static inline int get_channel_index(ushort_t port) {
if (((port & 0xfff8) == 0x1f0) ||
}
+static void ide_raise_irq(struct vm_device * dev, struct ide_channel * channel) {
+ if (channel->ctrl_reg.irq_disable == 0) {
+ v3_raise_irq(dev->vm, channel->irq);
+ }
+}
+
+
static void drive_reset(struct ide_drive * drive) {
drive->sector_count = 0x01;
drive->sector_num = 0x01;
drive->cylinder = 0x0000;
}
+
+ memset(drive->data_buf, 0, sizeof(drive->data_buf));
+ 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;
}
}
+static void ide_abort_command(struct vm_device * dev, struct ide_channel * channel) {
+ channel->status.val = 0x41; // Error + ready
+ channel->error_reg.val = 0x04; // No idea...
+
+ ide_raise_irq(dev, channel);
+}
+
+
+// Include the ATAPI interface handlers
+#include "atapi.h"
+
static int write_cmd_port(ushort_t port, void * src, 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);
+
+ if (length != 1) {
+ PrintError("Invalid Write Length on IDE command Port %x\n", port);
+ return -1;
+ }
+
PrintDebug("IDE: Writing Command Port %x (val=%x)\n", port, *(uint8_t *)src);
- return -1;
+
+ channel->cmd_reg = *(uint8_t *)src;
+
+ switch (channel->cmd_reg) {
+
+ case 0xa0: // ATAPI Command Packet
+ if (drive->drive_type != IDE_CDROM) {
+ ide_abort_command(dev, channel);
+ }
+
+ drive->sector_count = 1;
+
+ channel->status.busy = 0;
+ channel->status.write_fault = 0;
+ channel->status.data_req = 1;
+ channel->status.error = 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->error_reg.val = 0;
+ 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);
+
+ // JRL: Should we abort here?
+ ide_abort_command(dev, channel);
+ } else {
+ PrintError("IDE Disks currently not implemented\n");
+ return -1;
+ }
+ break;
+ default:
+ PrintError("Unimplemented IDE command (%x)\n", channel->cmd_reg);
+ 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) {
- PrintDebug("IDE: Reading Data Port %x\n", port);
+static int read_hd_data(uint8_t * dst, uint_t length, struct vm_device * dev, struct ide_channel * channel) {
+ PrintError("Harddrive data port read not implemented\n");
return -1;
}
+
+
+static int read_cd_data(uint8_t * dst, uint_t length, struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ int data_offset = drive->transfer_index % DATA_BUFFER_SIZE;
+ 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);
+ }
+
+ 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,
+ drive->transfer_index + length);
+ return -1;
+ }
+
+
+
+ if ((data_offset == 0) && (drive->transfer_index > 0)) {
+
+ if (drive->drive_type == IDE_CDROM) {
+ if (atapi_update_data_buf(dev, channel) == -1) {
+ PrintError("Could not update CDROM data buffer\n");
+ return -1;
+ }
+ } else {
+ PrintError("IDE Harddrives not implemented\n");
+ return -1;
+ }
+ }
+
+ memcpy(dst, drive->data_buf + data_offset, length);
+
+ drive->transfer_index += length;
+
+ 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...
+
+ channel->status.data_req = 1;
+
+ drive->irq_flags.c_d = 0;
+
+ // Update the request length in the cylinder regs
+ if (atapi_update_req_len(dev, channel, drive->transfer_length - drive->transfer_index) == -1) {
+ PrintError("Could not update request length after completed increment\n");
+ return -1;
+ }
+ } else {
+ // This was the final read of the request
+ channel->status.data_req = 0;
+ channel->status.ready = 1;
+
+ drive->irq_flags.c_d = 1;
+ drive->irq_flags.rel = 0;
+ }
+
+ drive->irq_flags.io_dir = 1;
+ channel->status.busy = 0;
+
+ ide_raise_irq(dev, channel);
+ }
+
+ return length;
+}
+
+
+static int read_drive_id(uint8_t * dst, uint_t length, struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ channel->status.busy = 0;
+ channel->status.ready = 1;
+ channel->status.write_fault = 0;
+ channel->status.seek_complete = 1;
+ channel->status.corrected = 0;
+ channel->status.error = 0;
+
+
+ memcpy(dst, drive->data_buf + drive->transfer_index, length);
+ drive->transfer_index += length;
+
+ if (drive->transfer_index >= drive->transfer_length) {
+ channel->status.data_req = 0;
+ }
+
+ return length;
+}
+
+
+static int ide_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);
+
+ // PrintDebug("IDE: Reading Data Port %x (len=%d)\n", port, length);
+
+ if ((channel->cmd_reg == 0xec) ||
+ (channel->cmd_reg == 0xa1)) {
+ return read_drive_id((uint8_t *)dst, length, dev, channel);
+ }
+
+ if (drive->drive_type == IDE_CDROM) {
+ if (read_cd_data((uint8_t *)dst, length, dev, channel) == -1) {
+ PrintError("IDE: Could not read CD Data\n");
+ return -1;
+ }
+ } else if (drive->drive_type == IDE_DISK) {
+ if (read_hd_data((uint8_t *)dst, length, dev, channel) == -1) {
+ PrintError("IDE: Could not read HD Data\n");
+ return -1;
+ }
+ } else {
+ memset((uint8_t *)dst, 0, length);
+ }
+
+ return length;
+}
+
static int write_port_std(ushort_t port, void * src, 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);
return -1;
}
+ PrintDebug("\tVal=%x\n", *(uint8_t *)dst);
+
return length;
}
memset(drive->model, 0, sizeof(drive->model));
+ 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;
+
for (i = 0; i < 2; i++) {
init_drive(&(channel->drives[i]));
}
for (i = 0; i < 2; i++) {
init_channel(&(ide->channels[i]));
+
+ // JRL: this is a terrible hack...
+ ide->channels[i].irq = PRI_DEFAULT_IRQ + i;
}
}
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, PRI_DATA_PORT,
- &read_data_port, &write_data_port);
+ &ide_read_data_port, &write_data_port);
v3_dev_hook_io(dev, PRI_FEATURES_PORT,
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, PRI_SECT_CNT_PORT,
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, SEC_DATA_PORT,
- &read_data_port, &write_data_port);
+ &ide_read_data_port, &write_data_port);
v3_dev_hook_io(dev, SEC_FEATURES_PORT,
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, SEC_SECT_CNT_PORT,
strncpy(drive->model, dev_name, sizeof(drive->model) - 1);
+ while (strlen((char *)(drive->model)) < 40) {
+ strcat((char*)(drive->model), " ");
+ }
+
+
drive->drive_type = IDE_CDROM;
drive->cd_ops = ops;
