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, 47 insertions, 0 deletions

diff --git a/include/hw/ssi/sifive_spi.h b/include/hw/ssi/sifive_spi.h
new file mode 100644
index 000000000..47d0d6a47
--- /dev/null
+++ b/include/hw/ssi/sifive_spi.h
@@ -0,0 +1,47 @@
+/*
+ * QEMU model of the SiFive SPI Controller
+ *
+ * Copyright (c) 2021 Wind River Systems, Inc.
+ *
+ * Author:
+ *   Bin Meng <bin.meng@windriver.com>
+ *
+ * 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_SIFIVE_SPI_H
+#define HW_SIFIVE_SPI_H
+
+#define SIFIVE_SPI_REG_NUM  (0x78 / 4)
+
+#define TYPE_SIFIVE_SPI "sifive.spi"
+#define SIFIVE_SPI(obj) OBJECT_CHECK(SiFiveSPIState, (obj), TYPE_SIFIVE_SPI)
+
+typedef struct SiFiveSPIState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion mmio;
+    qemu_irq irq;
+
+    uint32_t num_cs;
+    qemu_irq *cs_lines;
+
+    SSIBus *spi;
+
+    Fifo8 tx_fifo;
+    Fifo8 rx_fifo;
+
+    uint32_t regs[SIFIVE_SPI_REG_NUM];
+} SiFiveSPIState;
+
+#endif /* HW_SIFIVE_SPI_H */