--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/virtio.h	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,148 @@
+/*
+ * Virtio Support
+ *
+ * Copyright IBM, Corp. 2007
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef _QEMU_VIRTIO_H
+#define _QEMU_VIRTIO_H
+
+#include "hw.h"
+
+/* from Linux's linux/virtio_config.h */
+
+/* Status byte for guest to report progress, and synchronize features. */
+/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
+#define VIRTIO_CONFIG_S_ACKNOWLEDGE     1
+/* We have found a driver for the device. */
+#define VIRTIO_CONFIG_S_DRIVER          2
+/* Driver has used its parts of the config, and is happy */
+#define VIRTIO_CONFIG_S_DRIVER_OK       4
+/* We've given up on this device. */
+#define VIRTIO_CONFIG_S_FAILED          0x80
+
+/* We notify when the ring is completely used, even if the guest is supressing
+ * callbacks */
+#define VIRTIO_F_NOTIFY_ON_EMPTY        24
+
+/* from Linux's linux/virtio_ring.h */
+
+/* This marks a buffer as continuing via the next field. */
+#define VRING_DESC_F_NEXT       1
+/* This marks a buffer as write-only (otherwise read-only). */
+#define VRING_DESC_F_WRITE      2
+
+/* This means don't notify other side when buffer added. */
+#define VRING_USED_F_NO_NOTIFY  1
+/* This means don't interrupt guest when buffer consumed. */
+#define VRING_AVAIL_F_NO_INTERRUPT      1
+
+struct VirtQueue;
+
+static inline target_phys_addr_t vring_align(target_phys_addr_t addr,
+                                             unsigned long align)
+{
+    return (addr + align - 1) & ~(align - 1);
+}
+
+typedef struct VirtQueue VirtQueue;
+typedef struct VirtIODevice VirtIODevice;
+
+#define VIRTQUEUE_MAX_SIZE 1024
+
+typedef struct VirtQueueElement
+{
+    unsigned int index;
+    unsigned int out_num;
+    unsigned int in_num;
+    target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE];
+    struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
+    struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
+} VirtQueueElement;
+
+#define VIRTIO_PCI_QUEUE_MAX 16
+
+struct VirtIODevice
+{
+    const char *name;
+    uint32_t addr;
+    uint8_t status;
+    uint8_t isr;
+    uint16_t queue_sel;
+    uint32_t features;
+    size_t config_len;
+    void *config;
+    uint32_t (*get_features)(VirtIODevice *vdev);
+    void (*set_features)(VirtIODevice *vdev, uint32_t val);
+    void (*get_config)(VirtIODevice *vdev, uint8_t *config);
+    void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
+    void (*reset)(VirtIODevice *vdev);
+    VirtQueue *vq;
+    /* Bus binding callbacks.  */
+    void *binding_dev;
+    void (*update_irq)(VirtIODevice *vdev);
+    void (*save_binding)(VirtIODevice *vdev, QEMUFile *f);
+    void (*load_binding)(VirtIODevice *vdev, QEMUFile *f);
+};
+
+typedef VirtIODevice *(*VirtIOBindFn)(void *args, const char *name,
+                                      uint16_t vendor, uint16_t device,
+                                      size_t config_size, size_t struct_size);
+
+VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
+                            void (*handle_output)(VirtIODevice *,
+                                                  VirtQueue *));
+
+void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
+                    unsigned int len);
+void virtqueue_flush(VirtQueue *vq, unsigned int count);
+void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
+                    unsigned int len, unsigned int idx);
+
+int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
+int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes);
+
+void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
+
+void virtio_save(VirtIODevice *vdev, QEMUFile *f);
+
+void virtio_load(VirtIODevice *vdev, QEMUFile *f);
+
+void virtio_notify_config(VirtIODevice *vdev);
+
+void virtio_queue_set_notification(VirtQueue *vq, int enable);
+
+int virtio_queue_ready(VirtQueue *vq);
+
+int virtio_queue_empty(VirtQueue *vq);
+
+/* Functions for use by VirtIO bus bindings.  */
+
+VirtIODevice *virtio_init_common(const char *name, size_t config_size,
+                                 size_t struct_size);
+
+void virtio_set_vring_addr(VirtIODevice *vdev, int n, target_phys_addr_t pa);
+target_phys_addr_t virtio_get_vring_pa(VirtIODevice *vdev, int n);
+target_phys_addr_t virtio_get_vring_num(VirtIODevice *vdev, int n);
+void virtio_kick(VirtIODevice *vdev, int n);
+void virtio_reset(void *opaque);
+uint32_t virtio_config_readb(void *opaque, uint32_t addr);
+uint32_t virtio_config_readw(void *opaque, uint32_t addr);
+uint32_t virtio_config_readl(void *opaque, uint32_t addr);
+void virtio_config_writeb(void *opaque, uint32_t addr, uint32_t data);
+void virtio_config_writew(void *opaque, uint32_t addr, uint32_t data);
+void virtio_config_writel(void *opaque, uint32_t addr, uint32_t data);
+
+static inline void virtio_update_irq(VirtIODevice *dev)
+{
+    dev->update_irq(dev);
+}
+
+#endif