Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 56 insertions, 0 deletions

diff --git a/include/hw/intc/imx_avic.h b/include/hw/intc/imx_avic.h
new file mode 100644
index 000000000..75fbd1a89
--- /dev/null
+++ b/include/hw/intc/imx_avic.h
@@ -0,0 +1,56 @@
+/*
+ * i.MX31 Vectored Interrupt Controller
+ *
+ * Note this is NOT the PL192 provided by ARM, but
+ * a custom implementation by Freescale.
+ *
+ * Copyright (c) 2008 OKL
+ * Copyright (c) 2011 NICTA Pty Ltd
+ * Originally written by Hans Jiang
+ * Updated by Jean-Christophe Dubois <jcd@tribudubois.net>
+ *
+ * This code is licensed under the GPL version 2 or later.  See
+ * the COPYING file in the top-level directory.
+ *
+ * TODO: implement vectors.
+ */
+#ifndef IMX_AVIC_H
+#define IMX_AVIC_H
+
+#include "hw/sysbus.h"
+#include "qom/object.h"
+
+#define TYPE_IMX_AVIC "imx.avic"
+OBJECT_DECLARE_SIMPLE_TYPE(IMXAVICState, IMX_AVIC)
+
+#define IMX_AVIC_NUM_IRQS 64
+
+/* Interrupt Control Bits */
+#define ABFLAG (1<<25)
+#define ABFEN  (1<<24)
+#define NIDIS  (1<<22) /* Normal Interrupt disable */
+#define FIDIS  (1<<21) /* Fast interrupt disable */
+#define NIAD   (1<<20) /* Normal Interrupt Arbiter Rise ARM level */
+#define FIAD   (1<<19) /* Fast Interrupt Arbiter Rise ARM level */
+#define NM     (1<<18) /* Normal interrupt mode */
+
+#define PRIO_PER_WORD (sizeof(uint32_t) * 8 / 4)
+#define PRIO_WORDS (IMX_AVIC_NUM_IRQS/PRIO_PER_WORD)
+
+struct IMXAVICState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    MemoryRegion iomem;
+    uint64_t pending;
+    uint64_t enabled;
+    uint64_t is_fiq;
+    uint32_t intcntl;
+    uint32_t intmask;
+    qemu_irq irq;
+    qemu_irq fiq;
+    uint32_t prio[PRIO_WORDS]; /* Priorities are 4-bits each */
+};
+
+#endif /* IMX_AVIC_H */