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>
26 #ifndef CONFIG_DEBUG_IDE
28 #define PrintDebug(fmt, args...)
33 uint32_t capacity; // in bytes
35 struct vm_device * ide;
42 // HDs always read 512 byte blocks... ?
43 static int hd_read(uint8_t * buf, int sector_count, uint64_t lba, void * private_data) {
44 struct vm_device * hd_dev = (struct vm_device *)private_data;
45 struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
46 int offset = lba * HD_SECTOR_SIZE;
47 int length = sector_count * HD_SECTOR_SIZE;
49 // PrintDebug("Reading RAM HD at (LBA=%d) offset %d (length=%d)\n", (uint32_t)lba, offset, length);
51 memcpy(buf, (uint8_t *)(hd->disk_image + offset), length);
57 static int hd_write(uint8_t * buf, int sector_count, uint64_t lba, void * private_data) {
58 struct vm_device * hd_dev = (struct vm_device *)private_data;
59 struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
60 int offset = lba * HD_SECTOR_SIZE;
61 int length = sector_count * HD_SECTOR_SIZE;
63 memcpy((uint8_t *)(hd->disk_image + offset), buf, length);
69 static uint64_t hd_get_capacity(void * private_data) {
70 struct vm_device * hd_dev = (struct vm_device *)private_data;
71 struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
72 PrintDebug("Querying RAM HD capacity (bytes=%d) (ret = %d)\n",
73 hd->capacity, hd->capacity / HD_SECTOR_SIZE);
74 return hd->capacity / HD_SECTOR_SIZE;
77 static struct v3_hd_ops hd_ops = {
80 .get_capacity = hd_get_capacity,
86 static int hd_free(struct vm_device * dev) {
90 static struct v3_device_ops dev_ops = {
100 static int hd_init(struct guest_info * vm, void * cfg_data) {
101 struct hd_state * hd = NULL;
102 struct ram_hd_cfg * cfg = (struct ram_hd_cfg *)cfg_data;
104 if (cfg->size % HD_SECTOR_SIZE) {
105 PrintError("HD image must be an integral of sector size (HD_SECTOR_SIZE=%d)\n", HD_SECTOR_SIZE);
109 hd = (struct hd_state *)V3_Malloc(sizeof(struct hd_state));
111 PrintDebug("Registering Ram HDD at %p (size=%d)\n", (void *)cfg->ramdisk, cfg->size);
113 hd->disk_image = cfg->ramdisk;
114 hd->capacity = cfg->size;
116 hd->ide = v3_find_dev(vm, cfg->ide);
119 PrintError("Could not find backend %s\n", cfg->ide);
124 hd->drive = cfg->drive;
126 struct vm_device * dev = v3_allocate_device("RAM-HD", &dev_ops, hd);
128 if (v3_attach_device(vm, dev) == -1) {
129 PrintError("Could not attach device %s\n", "RAM-HD");
134 if (v3_ide_register_harddisk(hd->ide, hd->bus, hd->drive, "RAM-HD", &hd_ops, dev) == -1) {
142 device_register("RAM-HD", hd_init)