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, 81 insertions, 0 deletions

diff --git a/include/hw/timer/imx_epit.h b/include/hw/timer/imx_epit.h
new file mode 100644
index 000000000..2acc41e98
--- /dev/null
+++ b/include/hw/timer/imx_epit.h
@@ -0,0 +1,81 @@
+/*
+ * i.MX EPIT Timer
+ *
+ * Copyright (c) 2008 OK Labs
+ * Copyright (c) 2011 NICTA Pty Ltd
+ * Originally written by Hans Jiang
+ * Updated by Peter Chubb
+ * Updated by Jean-Christophe Dubois <jcd@tribudubois.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef IMX_EPIT_H
+#define IMX_EPIT_H
+
+#include "hw/sysbus.h"
+#include "hw/ptimer.h"
+#include "hw/misc/imx_ccm.h"
+#include "qom/object.h"
+
+/*
+ * EPIT: Enhanced periodic interrupt timer
+ */
+
+#define CR_EN       (1 << 0)
+#define CR_ENMOD    (1 << 1)
+#define CR_OCIEN    (1 << 2)
+#define CR_RLD      (1 << 3)
+#define CR_PRESCALE_SHIFT (4)
+#define CR_PRESCALE_MASK  (0xfff)
+#define CR_SWR      (1 << 16)
+#define CR_IOVW     (1 << 17)
+#define CR_DBGEN    (1 << 18)
+#define CR_WAITEN   (1 << 19)
+#define CR_DOZEN    (1 << 20)
+#define CR_STOPEN   (1 << 21)
+#define CR_CLKSRC_SHIFT (24)
+#define CR_CLKSRC_MASK  (0x3 << CR_CLKSRC_SHIFT)
+
+#define EPIT_TIMER_MAX  0XFFFFFFFFUL
+
+#define TYPE_IMX_EPIT "imx.epit"
+OBJECT_DECLARE_SIMPLE_TYPE(IMXEPITState, IMX_EPIT)
+
+struct IMXEPITState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    ptimer_state *timer_reload;
+    ptimer_state *timer_cmp;
+    MemoryRegion  iomem;
+    IMXCCMState  *ccm;
+
+    uint32_t cr;
+    uint32_t sr;
+    uint32_t lr;
+    uint32_t cmp;
+    uint32_t cnt;
+
+    uint32_t freq;
+    qemu_irq irq;
+};
+
+#endif /* IMX_EPIT_H */