1 files changed, 96 insertions, 0 deletions
diff --git a/middleware/multicore/open-amp/virtio/virtio.c b/middleware/multicore/open-amp/virtio/virtio.c
new file mode 100644
index 0000000..b2de79e
--- /dev/null
+++ b/middleware/multicore/open-amp/virtio/virtio.c
@@ -0,0 +1,96 @@
+/*-
+ * Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "virtio.h"
+
+static const char *virtio_feature_name(unsigned long feature, struct virtio_feature_desc *);
+
+//TODO : This structure may change depending on the types of devices we support.
+static struct virtio_ident {
+    unsigned short  devid;
+    const char  *name;
+} virtio_ident_table[] = {
+    { VIRTIO_ID_NETWORK,    "Network"   },
+    { VIRTIO_ID_BLOCK,  "Block"     },
+    { VIRTIO_ID_CONSOLE,    "Console"   },
+    { VIRTIO_ID_ENTROPY,    "Entropy"   },
+    { VIRTIO_ID_BALLOON,    "Balloon"   },
+    { VIRTIO_ID_IOMEMORY,   "IOMemory"  },
+    { VIRTIO_ID_SCSI,   "SCSI"      },
+    { VIRTIO_ID_9P,     "9P Transport"  },
+
+    { 0, NULL }
+};
+
+/* Device independent features. */
+static struct virtio_feature_desc virtio_common_feature_desc[] = {
+    { VIRTIO_F_NOTIFY_ON_EMPTY, "NotifyOnEmpty" },
+    { VIRTIO_RING_F_INDIRECT_DESC,  "RingIndirect"  },
+    { VIRTIO_RING_F_EVENT_IDX,  "EventIdx"  },
+    { VIRTIO_F_BAD_FEATURE,     "BadFeature"    },
+
+    { 0, NULL }
+};
+
+const char *
+virtio_dev_name(unsigned short devid)
+{
+    struct virtio_ident *ident;
+
+    for (ident = virtio_ident_table; ident->name != NULL; ident++) {
+        if (ident->devid == devid)
+            return (ident->name);
+    }
+
+    return (NULL);
+}
+
+static const char *
+virtio_feature_name(unsigned long val, struct virtio_feature_desc *desc)
+{
+    int i, j;
+    struct virtio_feature_desc *descs[2] = { desc,
+        virtio_common_feature_desc };
+
+    for (i = 0; i < 2; i++) {
+        if (descs[i] == NULL)
+            continue;
+
+        for (j = 0; descs[i][j].vfd_val != 0; j++) {
+            if (val == descs[i][j].vfd_val)
+                return (descs[i][j].vfd_str);
+        }
+    }
+
+    return (NULL);
+}
+
+void virtio_describe(struct virtio_device *dev, const char *msg,
+    uint32_t features, struct virtio_feature_desc *desc)
+{
+    // TODO: Not used currently - keeping it for future use
+    virtio_feature_name(0,desc);
+}
+