2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #include <palacios/vmm.h>
21 #include <devices/ram_hd.h>
22 #include <devices/ide.h>
27 uint32_t capacity; // in bytes
29 struct vm_device * ide;
36 // HDs always read 2048 byte blocks... ?
37 static int hd_read(uint8_t * buf, int count, int lba, void * private_data) {
38 struct vm_device * hd_dev = (struct vm_device *)private_data;
39 struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
40 int offset = lba * IDE_SECTOR_SIZE;
41 int length = ((offset + count) > hd->capacity) ? (hd->capacity - offset) : count;
43 PrintDebug("Reading RAM HD at (LBA=%d) offset %d (length=%d)\n", lba, offset, length);
45 memcpy(buf, (uint8_t *)(hd->disk_image + offset), length);
47 // Pad out the rest of the buffer with 0's
48 // memset(buf + length, 0, IDE_SECTOR_SIZE - length);
54 static uint32_t hd_get_capacity(void * private_data) {
55 struct vm_device * hd_dev = (struct vm_device *)private_data;
56 struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
57 PrintDebug("Querying RAM HD capacity (bytes=%d) (ret = %d)\n",
58 hd->capacity, (hd->capacity + IDE_SECTOR_SIZE - 1) / IDE_SECTOR_SIZE);
59 return (hd->capacity + IDE_SECTOR_SIZE - 1) / IDE_SECTOR_SIZE;
62 static struct v3_ide_hd_ops hd_ops = {
64 .get_capacity = hd_get_capacity,
68 static int hd_init(struct vm_device * dev) {
69 struct hd_state * hd = (struct hd_state *)(dev->private_data);
71 if (v3_ide_register_harddisk(hd->ide, hd->bus, hd->drive, "V3-RAM-HD", &hd_ops, dev) == -1) {
79 static int hd_deinit(struct vm_device * dev) {
83 static struct vm_device_ops dev_ops = {
91 struct vm_device * v3_create_ram_hd(struct vm_device * ide,
92 uint_t bus, uint_t drive,
93 addr_t ramdisk, uint32_t size) {
94 struct hd_state * hd = (struct hd_state *)V3_Malloc(sizeof(struct hd_state));
96 PrintDebug("Registering Ram HDD at %p (size=%d)\n", (void *)ramdisk, size);
98 hd->disk_image = ramdisk;
105 struct vm_device * hd_dev = v3_create_device("RAM-HD", &dev_ops, hd);