1 files changed, 97 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/include/gpxe/virtio-pci.h b/contrib/syslinux-4.02/gpxe/src/include/gpxe/virtio-pci.h
new file mode 100644
index 0000000..f0c17e8
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/include/gpxe/virtio-pci.h
@@ -0,0 +1,97 @@
+#ifndef _VIRTIO_PCI_H_
+# define _VIRTIO_PCI_H_
+
+/* A 32-bit r/o bitmask of the features supported by the host */
+#define VIRTIO_PCI_HOST_FEATURES        0
+
+/* A 32-bit r/w bitmask of features activated by the guest */
+#define VIRTIO_PCI_GUEST_FEATURES       4
+
+/* A 32-bit r/w PFN for the currently selected queue */
+#define VIRTIO_PCI_QUEUE_PFN            8
+
+/* A 16-bit r/o queue size for the currently selected queue */
+#define VIRTIO_PCI_QUEUE_NUM            12
+
+/* A 16-bit r/w queue selector */
+#define VIRTIO_PCI_QUEUE_SEL            14
+
+/* A 16-bit r/w queue notifier */
+#define VIRTIO_PCI_QUEUE_NOTIFY         16
+
+/* An 8-bit device status register.  */
+#define VIRTIO_PCI_STATUS               18
+
+/* An 8-bit r/o interrupt status register.  Reading the value will return the
+ * current contents of the ISR and will also clear it.  This is effectively
+ * a read-and-acknowledge. */
+#define VIRTIO_PCI_ISR                  19
+
+/* The bit of the ISR which indicates a device configuration change. */
+#define VIRTIO_PCI_ISR_CONFIG           0x2
+
+/* The remaining space is defined by each driver as the per-driver
+ * configuration space */
+#define VIRTIO_PCI_CONFIG               20
+
+/* Virtio ABI version, this must match exactly */
+#define VIRTIO_PCI_ABI_VERSION          0
+
+static inline u32 vp_get_features(unsigned int ioaddr)
+{
+   return inl(ioaddr + VIRTIO_PCI_HOST_FEATURES);
+}
+
+static inline void vp_set_features(unsigned int ioaddr, u32 features)
+{
+        outl(features, ioaddr + VIRTIO_PCI_GUEST_FEATURES);
+}
+
+static inline void vp_get(unsigned int ioaddr, unsigned offset,
+                     void *buf, unsigned len)
+{
+   u8 *ptr = buf;
+   unsigned i;
+
+   for (i = 0; i < len; i++)
+           ptr[i] = inb(ioaddr + VIRTIO_PCI_CONFIG + offset + i);
+}
+
+static inline u8 vp_get_status(unsigned int ioaddr)
+{
+   return inb(ioaddr + VIRTIO_PCI_STATUS);
+}
+
+static inline void vp_set_status(unsigned int ioaddr, u8 status)
+{
+   if (status == 0)        /* reset */
+           return;
+   outb(status, ioaddr + VIRTIO_PCI_STATUS);
+}
+
+
+static inline void vp_reset(unsigned int ioaddr)
+{
+   outb(0, ioaddr + VIRTIO_PCI_STATUS);
+   (void)inb(ioaddr + VIRTIO_PCI_ISR);
+}
+
+static inline void vp_notify(unsigned int ioaddr, int queue_index)
+{
+   outw(queue_index, ioaddr + VIRTIO_PCI_QUEUE_NOTIFY);
+}
+
+static inline void vp_del_vq(unsigned int ioaddr, int queue_index)
+{
+   /* select the queue */
+
+   outw(queue_index, ioaddr + VIRTIO_PCI_QUEUE_SEL);
+
+   /* deactivate the queue */
+
+   outl(0, ioaddr + VIRTIO_PCI_QUEUE_PFN);
+}
+
+int vp_find_vq(unsigned int ioaddr, int queue_index,
+               struct vring_virtqueue *vq);
+#endif /* _VIRTIO_PCI_H_ */