#define ATAPI_BLOCK_SIZE 2048
#define IDE_SECTOR_SIZE 512
-typedef enum {IDE_DISK, IDE_CDROM, IDE_NONE} v3_ide_dev_type_t;
+typedef enum {IDE_NONE, IDE_DISK, IDE_CDROM} v3_ide_dev_type_t;
struct v3_ide_cd_ops {
uint32_t (*get_capacity)(void * private_data);
// Reads always operate on 2048 byte blocks
- int (*read)(uint8_t * buf, int count, int lba, void * private_data);
+ int (*read)(uint8_t * buf, int block_count, uint64_t lba, void * private_data);
};
struct v3_ide_hd_ops {
- uint32_t (*get_capacity)(void * private_data);
+ uint64_t (*get_capacity)(void * private_data);
// Reads always operate on 2048 byte blocks
- int (*read)(uint8_t * buf, int count, int lba, void * private_data);
+ int (*read)(uint8_t * buf, int sector_count, uint64_t lba, void * private_data);
};
--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+
+static void ata_identify_device(struct ide_drive * drive) {
+ struct ide_drive_id * drive_id = (struct ide_drive_id *)(drive->data_buf);
+ const char* serial_number = " VT00001\0\0\0\0\0\0\0\0\0\0\0\0";
+ const char* firmware = "ALPHA1 ";
+
+ drive->transfer_length = 512;
+ drive->transfer_index = 0;
+
+
+ memset(drive_id->buf, 0, sizeof(drive_id->buf));
+
+ drive_id->fixed_drive = 1;
+ drive_id->removable_media = 0;
+
+ // Black magic...
+ drive_id->disk_speed1 = 1;
+ drive_id->disk_speed3 = 1;
+
+ drive_id->cdrom_flag = 0;
+
+ // Make it the simplest drive possible (1 head, 1 cyl, 1 sect/track)
+ drive_id->num_cylinders = 1;
+ drive_id->num_heads = 1;
+ drive_id->bytes_per_track = IDE_SECTOR_SIZE;
+ drive_id->bytes_per_sector = IDE_SECTOR_SIZE;
+ drive_id->sectors_per_track = 1;
+
+
+ // These buffers do not contain a terminating "\0"
+ memcpy(drive_id->serial_num, serial_number, strlen(serial_number));
+ memcpy(drive_id->firmware_rev, firmware, strlen(firmware));
+ memcpy(drive_id->model_num, drive->model, 40);
+
+ // 32 bits access
+ drive_id->dword_io = 1;
+
+ // enable DMA access
+ drive_id->dma_enable = 1;
+
+ // enable LBA access
+ drive_id->lba_enable = 1;
+
+ // Drive Capacity (28 bit LBA)
+ drive_id->lba_capacity = drive->hd_ops->get_capacity(drive->private_data);
+
+ // Drive Capacity (48 bit LBA)
+ drive_id->lba_capacity_2 = drive->hd_ops->get_capacity(drive->private_data);
+
+ drive_id->rw_multiples = 0x80ff;
+
+ // words 64-70, 54-58 valid
+ drive_id->field_valid = 0x0007; // DMA + pkg cmd valid
+
+ // copied from CFA540A
+ drive_id->buf[63] = 0x0103; // variable (DMA stuff)
+ //drive_id->buf[63] = 0x0000; // variable (DMA stuff)
+
+ // drive_id->buf[64] = 0x0001; // PIO
+ drive_id->buf[65] = 0x00b4;
+ drive_id->buf[66] = 0x00b4;
+ drive_id->buf[67] = 0x012c;
+ drive_id->buf[68] = 0x00b4;
+
+ drive_id->buf[71] = 30; // faked
+ drive_id->buf[72] = 30; // faked
+
+ // drive_id->buf[80] = 0x1e; // supports up to ATA/ATAPI-4
+ drive_id->major_rev_num = 0x0040; // supports up to ATA/ATAPI-6
+
+ drive_id->buf[83] |= 0x0400; // supports 48 bit LBA
+
+
+ drive_id->dma_ultra = 0x2020; // Ultra_DMA_Mode_5_Selected | Ultra_DMA_Mode_5_Supported;
+}
+
+
+static int ata_read(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ if (drive->hd_state.accessed == 0) {
+ drive->current_lba = 0;
+ drive->hd_state.accessed = 1;
+ }
+
+ int ret = drive->hd_ops->read(drive->data_buf, 1, drive->current_lba, drive->private_data);
+
+ if (ret == -1) {
+ PrintError("IDE: Error reading HD block (LBA=%p)\n", (void *)(addr_t)(drive->current_lba));
+ return -1;
+ }
+
+ return 0;
+}
+
+
+
+// 28 bit LBA
+static int ata_read_sectors(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
+ uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
+
+ union {
+ uint32_t addr;
+ uint8_t buf[4];
+ } __attribute__((packed)) lba_addr;
+
+ /* LBA addr bits:
+ 0-8: sector number reg (drive->lba0)
+ 8-16: low cylinder reg (drive->lba1)
+ 16-24: high cylinder reg (drive->lba2)
+ 24-28: low 4 bits of drive_head reg (channel->drive_head.head_num)
+ */
+
+ lba_addr.buf[0] = drive->lba0;
+ lba_addr.buf[1] = drive->lba1;
+ lba_addr.buf[2] = drive->lba2;
+ lba_addr.buf[3] = channel->drive_head.lba3;
+
+ PrintDebug("LBA Address %d\n", drive->lba0);
+ PrintDebug("sector_num %d\n", drive->sector_num);
+
+
+ if (lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE) >
+ drive->hd_ops->get_capacity(drive->private_data)) {
+ PrintError("IDE: request size exceeds disk capacity (lba=%d) (sect_cnt=%d) (ReadEnd=%d) (capacity=%p)\n",
+ lba_addr.addr, sect_cnt,
+ lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE),
+ (void *)(addr_t)(drive->hd_ops->get_capacity(drive->private_data)));
+ ide_abort_command(dev, channel);
+ return 0;
+ }
+
+ drive->current_lba = lba_addr.addr;
+
+ if (ata_read(dev, channel) == -1) {
+ PrintError("Could not read disk sector\n");
+ return -1;
+ }
+
+ drive->transfer_length = sect_cnt * IDE_SECTOR_SIZE;
+ drive->transfer_index = 0;
+
+ channel->status.busy = 0;
+ channel->status.ready = 0;
+ channel->status.write_fault = 0;
+ channel->status.data_req = 1;
+ channel->status.error = 0;
+
+ drive->irq_flags.io_dir = 1;
+ drive->irq_flags.c_d = 0;
+ drive->irq_flags.rel = 0;
+
+
+ ide_raise_irq(dev, channel);
+
+ PrintDebug("Returning from read sectors\n");
+
+ return 0;
+}
+
+
+// 48 bit LBA
+static int ata_read_sectors_ext(struct vm_device * dev, struct ide_channel * channel) {
+ //struct ide_drive * drive = get_selected_drive(channel);
+ // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
+ //uint32_t sector_count = (drive->sector_count == 0) ? 256 : drive->sector_count;
+
+ PrintError("Extended Sector read not implemented\n");
+
+ return -1;
+}
static int atapi_read_chunk(struct vm_device * dev, struct ide_channel * channel) {
struct ide_drive * drive = get_selected_drive(channel);
- int ret = drive->cd_ops->read(drive->data_buf, ATAPI_BLOCK_SIZE, drive->cd_state.current_lba, drive->private_data);
-
+ int ret = drive->cd_ops->read(drive->data_buf, 1, drive->current_lba, drive->private_data);
+
if (ret == -1) {
- PrintError("IDE: Error reading CD block (LBA=%x)\n", drive->cd_state.current_lba);
+ PrintError("IDE: Error reading CD block (LBA=%p)\n", (void *)(addr_t)(drive->current_lba));
return -1;
}
case 0xa8: // read(12)
// Update lba address to point to next block
- drive->cd_state.current_lba++;
+ drive->current_lba++;
// read the next block
return atapi_read_chunk(dev, channel);
// PrintDebug("Reading %d blocks from LBA 0x%x\n", xfer_len, lba);
- drive->cd_state.current_lba = lba;
+ drive->current_lba = lba;
// Update the request length value in the cylinder registers
uint_t lba_mode : 1;
uint_t rsvd2 : 1;
} __attribute__((packed));
+
+ struct {
+ uint_t lba3 : 4;
+ uint_t rsvd3 : 4;
+ } __attribute__((packed));
+
} __attribute__((packed));
} __attribute__((packed));
}
-static const char * ide_dev_type_strs[] = {"HARDDISK", "CDROM", "NONE"};
+static const char * ide_dev_type_strs[] = {"NONE", "HARDDISK", "CDROM" };
static inline const char * device_type_to_str(v3_ide_dev_type_t type) {
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 {
-
+ int accessed;
};
struct ide_drive {
// calculated for easy access
uint_t transfer_length;
+ uint64_t current_lba;
// We have a local data buffer that we use for IO port accesses
uint8_t data_buf[DATA_BUFFER_SIZE];
union {
uint8_t sector_num; // 0x1f3,0x173
uint8_t lba0;
- };
+ } __attribute__((packed));
union {
uint16_t cylinder;
uint16_t lba12;
-
-
+
struct {
uint8_t cylinder_low; // 0x1f4,0x174
uint8_t cylinder_high; // 0x1f5,0x175
} __attribute__((packed));
-
+
struct {
uint8_t lba1;
uint8_t lba2;
} __attribute__((packed));
-
-
+
+
// The transfer length requested by the CPU
uint16_t req_len;
} __attribute__((packed));
static void drive_reset(struct ide_drive * drive) {
drive->sector_count = 0x01;
drive->sector_num = 0x01;
+
+ PrintDebug("Resetting drive %s\n", drive->model);
if (drive->drive_type == IDE_CDROM) {
drive->cylinder = 0xeb14;
} else {
drive->cylinder = 0x0000;
+ //drive->hd_state.accessed = 0;
}
-static void ide_identify_device(struct ide_drive * drive) {
- struct ide_drive_id * drive_id = (struct ide_drive_id *)(drive->data_buf);
- const char* serial_number = " VT00001\0\0\0\0\0\0\0\0\0\0\0\0";
- const char* firmware = "ALPHA1 ";
-
- drive->transfer_length = 512;
- drive->transfer_index = 0;
-
-
- memset(drive_id->buf, 0, sizeof(drive_id->buf));
-
- drive_id->fixed_drive = 1;
- drive_id->removable_media = 0;
-
- // Black magic...
- drive_id->disk_speed1 = 1;
- drive_id->disk_speed3 = 1;
-
- drive_id->cdrom_flag = 0;
-
- // Make it the simplest drive possible (1 head, 1 cyl, 1 sect/track)
- drive_id->num_cylinders = 1;
- drive_id->num_heads = 1;
- drive_id->bytes_per_track = IDE_SECTOR_SIZE;
- drive_id->bytes_per_sector = IDE_SECTOR_SIZE;
- drive_id->sectors_per_track = 1;
-
-
- // These buffers do not contain a terminating "\0"
- memcpy(drive_id->serial_num, serial_number, strlen(serial_number));
- memcpy(drive_id->firmware_rev, firmware, strlen(firmware));
- memcpy(drive_id->model_num, drive->model, 40);
-
- // 32 bits access
- drive_id->dword_io = 1;
-
- // enable DMA access
- drive_id->dma_enable = 1;
-
- // enable LBA access
- drive_id->lba_enable = 1;
-
- // Drive Capacity
- drive_id->lba_capacity = drive->hd_ops->get_capacity(drive->private_data);
-
- drive_id->rw_multiples = 0x80ff;
-
- // words 64-70, 54-58 valid
- drive_id->field_valid = 0x0007; // DMA + pkg cmd valid
-
- // copied from CFA540A
- drive_id->buf[63] = 0x0103; // variable (DMA stuff)
- //drive_id->buf[63] = 0x0000; // variable (DMA stuff)
-
- // drive_id->buf[64] = 0x0001; // PIO
- drive_id->buf[65] = 0x00b4;
- drive_id->buf[66] = 0x00b4;
- drive_id->buf[67] = 0x012c;
- drive_id->buf[68] = 0x00b4;
-
- drive_id->buf[71] = 30; // faked
- drive_id->buf[72] = 30; // faked
-
- // drive_id->buf[80] = 0x1e; // supports up to ATA/ATAPI-4
- drive_id->major_rev_num = 0x0040; // supports up to ATA/ATAPI-6
-
- drive_id->dma_ultra = 0x2020; // Ultra_DMA_Mode_5_Selected | Ultra_DMA_Mode_5_Supported;
-}
-
-
-
-
-
/* ATAPI functions */
#include "atapi.h"
+/* ATA functions */
+#include "ata.h"
+
/* IO Operations */
channel->cmd_reg = *(uint8_t *)src;
switch (channel->cmd_reg) {
-
+
+ case 0xa1: // ATAPI Identify Device Packet
+ if (drive->drive_type != IDE_CDROM) {
+ drive_reset(drive);
+
+ // JRL: Should we abort here?
+ ide_abort_command(dev, channel);
+ } else {
+
+ 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 {
+ ata_identify_device(drive);
+
+ channel->error_reg.val = 0;
+ channel->status.val = 0x58;
+
+ ide_raise_irq(dev, channel);
+ }
+ break;
+
case 0xa0: // ATAPI Command Packet
if (drive->drive_type != IDE_CDROM) {
ide_abort_command(dev, channel);
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);
+ case 0x20: // Read Sectors with Retry
+ case 0x21: // Read Sectors without Retry
+ if (ata_read_sectors(dev, channel) == -1) {
+ PrintError("Error reading sectors\n");
+ return -1;
+ }
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 {
- ide_identify_device(drive);
- channel->error_reg.val = 0;
- channel->status.val = 0x58;
-
- ide_raise_irq(dev, channel);
+ case 0x24: // Read Sectors Extended
+ if (ata_read_sectors_ext(dev, channel) == -1) {
+ PrintError("Error reading extended sectors\n");
+ return -1;
}
break;
-
case 0xef: // Set Features
// Prior to this the features register has been written to.
// This command tells the drive to check if the new value is supported (the value is drive specific)
ide_raise_irq(dev, channel);
break;
+
default:
PrintError("Unimplemented IDE command (%x)\n", channel->cmd_reg);
return -1;
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;
+ struct ide_drive * drive = get_selected_drive(channel);
+ int data_offset = drive->transfer_index % IDE_SECTOR_SIZE;
+
+
+
+ if (drive->transfer_index >= drive->transfer_length) {
+ PrintError("Buffer overrun... (xfer_len=%d) (cur_idx=%x) (post_idx=%d)\n",
+ drive->transfer_length, drive->transfer_index,
+ drive->transfer_index + length);
+ return -1;
+ }
+
+
+ if ((data_offset == 0) && (drive->transfer_index > 0)) {
+ drive->current_lba++;
+
+ if (ata_read(dev, channel) == -1) {
+ PrintError("Could not read next disk sector\n");
+ return -1;
+ }
+ }
+
+ /*
+ PrintDebug("Reading HD Data (Val=%x), (len=%d) (offset=%d)\n",
+ *(uint32_t *)(drive->data_buf + data_offset),
+ length, data_offset);
+ */
+ memcpy(dst, drive->data_buf + data_offset, length);
+
+ drive->transfer_index += length;
+
+ if ((drive->transfer_index % IDE_SECTOR_SIZE) == 0) {
+ if (drive->transfer_index < drive->transfer_length) {
+ // An increment is complete, but there is still more data to be transferred...
+ PrintDebug("Integral Complete, still transferring more sectors\n");
+ channel->status.data_req = 1;
+
+ drive->irq_flags.c_d = 0;
+ } else {
+ PrintDebug("Final Sector Transferred\n");
+ // This was the final read of the request
+ channel->status.data_req = 0;
+
+
+ drive->irq_flags.c_d = 1;
+ drive->irq_flags.rel = 0;
+ }
+
+ channel->status.ready = 1;
+ drive->irq_flags.io_dir = 1;
+ channel->status.busy = 0;
+
+ ide_raise_irq(dev, channel);
+ }
+
+
+ return length;
}
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 data_offset = drive->transfer_index % ATAPI_BLOCK_SIZE;
int req_offset = drive->transfer_index % drive->req_len;
if (drive->cd_state.atapi_cmd != 0x28) {
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");
+ if (atapi_update_data_buf(dev, channel) == -1) {
+ PrintError("Could not update CDROM data buffer\n");
return -1;
}
}
drive->transfer_index += length;
+
+ // Should the req_offset be recalculated here?????
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...
case PRI_SECT_CNT_PORT:
case SEC_SECT_CNT_PORT:
- drive->sector_count = *(uint8_t *)src;
+ channel->drives[0].sector_count = *(uint8_t *)src;
+ channel->drives[1].sector_count = *(uint8_t *)src;
break;
case PRI_SECT_NUM_PORT:
case SEC_SECT_NUM_PORT:
- drive->sector_num = *(uint8_t *)src;
-
+ channel->drives[0].sector_num = *(uint8_t *)src;
+ channel->drives[1].sector_num = *(uint8_t *)src;
+ break;
case PRI_CYL_LOW_PORT:
case SEC_CYL_LOW_PORT:
- drive->cylinder_low = *(uint8_t *)src;
+ channel->drives[0].cylinder_low = *(uint8_t *)src;
+ channel->drives[1].cylinder_low = *(uint8_t *)src;
break;
case PRI_CYL_HIGH_PORT:
case SEC_CYL_HIGH_PORT:
- drive->cylinder_high = *(uint8_t *)src;
+ channel->drives[0].cylinder_high = *(uint8_t *)src;
+ channel->drives[1].cylinder_high = *(uint8_t *)src;
break;
case PRI_DRV_SEL_PORT:
memset(drive->data_buf, 0, sizeof(drive->data_buf));
-
drive->private_data = NULL;
drive->cd_ops = NULL;
}
drive->drive_type = IDE_DISK;
+ drive->hd_state.accessed = 0;
+
drive->hd_ops = ops;
drive->private_data = private_data;
// HDs always read 2048 byte blocks... ?
-static int hd_read(uint8_t * buf, int count, int lba, void * private_data) {
+static int hd_read(uint8_t * buf, int sector_count, uint64_t lba, void * private_data) {
struct vm_device * hd_dev = (struct vm_device *)private_data;
struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
int offset = lba * IDE_SECTOR_SIZE;
- int length = ((offset + count) > hd->capacity) ? (hd->capacity - offset) : count;
+ int length = sector_count * IDE_SECTOR_SIZE;
- PrintDebug("Reading RAM HD at (LBA=%d) offset %d (length=%d)\n", lba, offset, length);
+ PrintDebug("Reading RAM HD at (LBA=%d) offset %d (length=%d)\n", (uint32_t)lba, offset, length);
memcpy(buf, (uint8_t *)(hd->disk_image + offset), length);
- // Pad out the rest of the buffer with 0's
- // memset(buf + length, 0, IDE_SECTOR_SIZE - length);
+
return 0;
}
-static uint32_t hd_get_capacity(void * private_data) {
+static uint64_t hd_get_capacity(void * private_data) {
struct vm_device * hd_dev = (struct vm_device *)private_data;
struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
PrintDebug("Querying RAM HD capacity (bytes=%d) (ret = %d)\n",
- hd->capacity, (hd->capacity + IDE_SECTOR_SIZE - 1) / IDE_SECTOR_SIZE);
- return (hd->capacity + IDE_SECTOR_SIZE - 1) / IDE_SECTOR_SIZE;
+ hd->capacity, hd->capacity / IDE_SECTOR_SIZE);
+ return hd->capacity / IDE_SECTOR_SIZE;
}
static struct v3_ide_hd_ops hd_ops = {
struct vm_device * v3_create_ram_hd(struct vm_device * ide,
uint_t bus, uint_t drive,
addr_t ramdisk, uint32_t size) {
- struct hd_state * hd = (struct hd_state *)V3_Malloc(sizeof(struct hd_state));
+ struct hd_state * hd = NULL;
+
+ if (size % IDE_SECTOR_SIZE) {
+ PrintError("HD image must be an integral of sector size (IDE_SECTOR_SIZE=%d)\n", IDE_SECTOR_SIZE);
+ return NULL;
+ }
+
+ hd = (struct hd_state *)V3_Malloc(sizeof(struct hd_state));
PrintDebug("Registering Ram HDD at %p (size=%d)\n", (void *)ramdisk, size);
