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, 76 insertions, 0 deletions

diff --git a/include/hw/intc/rx_icu.h b/include/hw/intc/rx_icu.h
new file mode 100644
index 000000000..7f5889b36
--- /dev/null
+++ b/include/hw/intc/rx_icu.h
@@ -0,0 +1,76 @@
+/*
+ * RX Interrupt Control Unit
+ *
+ * Copyright (c) 2019 Yoshinori Sato
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HW_INTC_RX_ICU_H
+#define HW_INTC_RX_ICU_H
+
+#include "hw/sysbus.h"
+#include "qom/object.h"
+
+enum TRG_MODE {
+    TRG_LEVEL = 0,
+    TRG_NEDGE = 1,      /* Falling */
+    TRG_PEDGE = 2,      /* Raising */
+    TRG_BEDGE = 3,      /* Both */
+};
+
+struct IRQSource {
+    enum TRG_MODE sense;
+    int level;
+};
+
+enum {
+    /* Software interrupt request */
+    SWI = 27,
+    NR_IRQS = 256
+};
+
+struct RXICUState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    MemoryRegion memory;
+    struct IRQSource src[NR_IRQS];
+    uint32_t nr_irqs;
+    uint8_t *map;
+    uint32_t nr_sense;
+    uint8_t *init_sense;
+
+    uint8_t ir[NR_IRQS];
+    uint8_t dtcer[NR_IRQS];
+    uint8_t ier[NR_IRQS / 8];
+    uint8_t ipr[142];
+    uint8_t dmasr[4];
+    uint16_t fir;
+    uint8_t nmisr;
+    uint8_t nmier;
+    uint8_t nmiclr;
+    uint8_t nmicr;
+    int16_t req_irq;
+    qemu_irq _irq;
+    qemu_irq _fir;
+    qemu_irq _swi;
+};
+
+#define TYPE_RX_ICU "rx-icu"
+OBJECT_DECLARE_SIMPLE_TYPE(RXICUState, RX_ICU)
+
+#endif /* RX_ICU_H */