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, 82 insertions, 0 deletions

diff --git a/include/hw/acpi/tco.h b/include/hw/acpi/tco.h
new file mode 100644
index 000000000..a1e0da821
--- /dev/null
+++ b/include/hw/acpi/tco.h
@@ -0,0 +1,82 @@
+/*
+ * QEMU ICH9 TCO emulation
+ *
+ * Copyright (c) 2015 Paulo Alcantara <pcacjr@zytor.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_ACPI_TCO_H
+#define HW_ACPI_TCO_H
+
+#include "exec/memory.h"
+
+/* As per ICH9 spec, the internal timer has an error of ~0.6s on every tick */
+#define TCO_TICK_NSEC 600000000LL
+
+/* TCO I/O register offsets */
+enum {
+    TCO_RLD           = 0x00,
+    TCO_DAT_IN        = 0x02,
+    TCO_DAT_OUT       = 0x03,
+    TCO1_STS          = 0x04,
+    TCO2_STS          = 0x06,
+    TCO1_CNT          = 0x08,
+    TCO2_CNT          = 0x0a,
+    TCO_MESSAGE1      = 0x0c,
+    TCO_MESSAGE2      = 0x0d,
+    TCO_WDCNT         = 0x0e,
+    SW_IRQ_GEN        = 0x10,
+    TCO_TMR           = 0x12,
+};
+
+/* TCO I/O register control/status bits */
+enum {
+    SW_TCO_SMI           = 1 << 1,
+    TCO_INT_STS          = 1 << 2,
+    TCO_LOCK             = 1 << 12,
+    TCO_TMR_HLT          = 1 << 11,
+    TCO_TIMEOUT          = 1 << 3,
+    TCO_SECOND_TO_STS    = 1 << 1,
+    TCO_BOOT_STS         = 1 << 2,
+};
+
+/* TCO I/O registers mask bits */
+enum {
+    TCO_RLD_MASK     = 0x3ff,
+    TCO1_STS_MASK    = 0xe870,
+    TCO2_STS_MASK    = 0xfff8,
+    TCO1_CNT_MASK    = 0xfeff,
+    TCO_TMR_MASK     = 0x3ff,
+};
+
+typedef struct TCOIORegs {
+    struct {
+        uint16_t rld;
+        uint8_t din;
+        uint8_t dout;
+        uint16_t sts1;
+        uint16_t sts2;
+        uint16_t cnt1;
+        uint16_t cnt2;
+        uint8_t msg1;
+        uint8_t msg2;
+        uint8_t wdcnt;
+        uint16_t tmr;
+    } tco;
+    uint8_t sw_irq_gen;
+
+    QEMUTimer *tco_timer;
+    int64_t expire_time;
+    uint8_t timeouts_no;
+
+    MemoryRegion io;
+} TCOIORegs;
+
+/* tco.c */
+void acpi_pm_tco_init(TCOIORegs *tr, MemoryRegion *parent);
+
+extern const VMStateDescription vmstate_tco_io_sts;
+
+#endif /* HW_ACPI_TCO_H */