--- /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".
+ */
+
+#include <palacios/vmm.h>
+#include <palacios/vmm_dev_mgr.h>
+#include <palacios/vmm_sym_swap.h>
+#include <palacios/vm_guest.h>
+
+
+
+void __udelay(unsigned long usecs);
+
+
+struct disk_state {
+ struct v3_dev_blk_ops * ops;
+ uint32_t seek_usecs;
+
+ void * private_data;
+};
+
+
+static int model_write(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
+ struct disk_state * model = (struct disk_state *)private_data;
+
+ __udelay(model->seek_usecs);
+
+ return model->ops->write(buf, lba, num_bytes, model->private_data);
+
+}
+
+static int model_read(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
+ struct disk_state * model = (struct disk_state *)private_data;
+
+ __udelay(model->seek_usecs);
+
+ return model->ops->read(buf, lba, num_bytes, model->private_data);
+
+}
+
+static uint64_t model_get_capacity(void * private_data) {
+ struct disk_state * model = (struct disk_state *)private_data;
+
+ return model->ops->get_capacity(model->private_data);
+}
+
+static int model_free(struct vm_device * dev) {
+ return -1;
+}
+
+
+
+static struct v3_dev_blk_ops blk_ops = {
+ .read = model_read,
+ .write = model_write,
+ .get_capacity = model_get_capacity,
+};
+
+
+
+static struct v3_device_ops dev_ops = {
+ .free = model_free,
+ .reset = NULL,
+ .start = NULL,
+ .stop = NULL,
+};
+
+
+static int connect_fn(struct guest_info * info,
+ void * frontend_data,
+ struct v3_dev_blk_ops * ops,
+ v3_cfg_tree_t * cfg,
+ void * private_data) {
+
+ v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
+ uint32_t seek_time = atoi(v3_cfg_val(cfg, "seek_us"));
+ struct disk_state * model = (struct disk_state *)V3_Malloc(sizeof(struct disk_state));
+
+
+ model->ops = ops;
+ model->seek_usecs = seek_time;
+ model->private_data = private_data;
+
+ if (v3_dev_connect_blk(info, v3_cfg_val(frontend_cfg, "tag"),
+ &blk_ops, frontend_cfg, model) == -1) {
+ PrintError("Could not connect to frontend %s\n",
+ v3_cfg_val(frontend_cfg, "tag"));
+ return -1;
+ }
+
+ return 0;
+}
+
+static int model_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
+
+ char * name = v3_cfg_val(cfg, "name");
+
+ struct vm_device * dev = v3_allocate_device(name, &dev_ops, NULL);
+
+ if (v3_attach_device(vm, dev) == -1) {
+ PrintError("Could not attach device %s\n", name);
+ return -1;
+ }
+
+ if (v3_dev_add_blk_frontend(vm, name, connect_fn, NULL) == -1) {
+ PrintError("Could not register %s as block frontend\n", name);
+ return -1;
+ }
+
+
+ return 0;
+}
+
+
+
+device_register("DISK_MODEL", model_init)
