--- /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;
+}
