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, 86 insertions, 0 deletions

diff --git a/include/hw/timer/hpet.h b/include/hw/timer/hpet.h
new file mode 100644
index 000000000..f04c4d323
--- /dev/null
+++ b/include/hw/timer/hpet.h
@@ -0,0 +1,86 @@
+/*
+ * QEMU Emulated HPET support
+ *
+ * Copyright IBM, Corp. 2008
+ *
+ * Authors:
+ *  Beth Kon   <bkon@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HW_HPET_H
+#define HW_HPET_H
+
+#include "qom/object.h"
+
+#define HPET_BASE               0xfed00000
+#define HPET_LEN                0x400
+#define HPET_CLK_PERIOD         10 /* 10 ns*/
+
+#define FS_PER_NS 1000000       /* 1000000 femtoseconds == 1 ns */
+#define HPET_MIN_TIMERS         3
+#define HPET_MAX_TIMERS         32
+
+#define HPET_NUM_IRQ_ROUTES     32
+
+#define HPET_LEGACY_PIT_INT     0
+#define HPET_LEGACY_RTC_INT     1
+
+#define HPET_CFG_ENABLE 0x001
+#define HPET_CFG_LEGACY 0x002
+
+#define HPET_ID         0x000
+#define HPET_PERIOD     0x004
+#define HPET_CFG        0x010
+#define HPET_STATUS     0x020
+#define HPET_COUNTER    0x0f0
+#define HPET_TN_CFG     0x000
+#define HPET_TN_CMP     0x008
+#define HPET_TN_ROUTE   0x010
+#define HPET_CFG_WRITE_MASK  0x3
+
+#define HPET_ID_NUM_TIM_SHIFT   8
+#define HPET_ID_NUM_TIM_MASK    0x1f00
+
+#define HPET_TN_TYPE_LEVEL       0x002
+#define HPET_TN_ENABLE           0x004
+#define HPET_TN_PERIODIC         0x008
+#define HPET_TN_PERIODIC_CAP     0x010
+#define HPET_TN_SIZE_CAP         0x020
+#define HPET_TN_SETVAL           0x040
+#define HPET_TN_32BIT            0x100
+#define HPET_TN_INT_ROUTE_MASK  0x3e00
+#define HPET_TN_FSB_ENABLE      0x4000
+#define HPET_TN_FSB_CAP         0x8000
+#define HPET_TN_CFG_WRITE_MASK  0x7f4e
+#define HPET_TN_INT_ROUTE_SHIFT      9
+#define HPET_TN_INT_ROUTE_CAP_SHIFT 32
+#define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U
+
+struct hpet_fw_entry
+{
+    uint32_t event_timer_block_id;
+    uint64_t address;
+    uint16_t min_tick;
+    uint8_t page_prot;
+} QEMU_PACKED;
+
+struct hpet_fw_config
+{
+    uint8_t count;
+    struct hpet_fw_entry hpet[8];
+} QEMU_PACKED;
+
+extern struct hpet_fw_config hpet_cfg;
+
+#define TYPE_HPET "hpet"
+
+static inline bool hpet_find(void)
+{
+    return object_resolve_path_type("", TYPE_HPET, NULL);
+}
+
+#endif