HV:Acrn-hypvervisor Root Directory Clean-up and create misc/ folder for Acrn daemons, services and tools.

This patch is to clean-up acrn-hypervisor root directory, targt only 5 folders under acrn-hypervisor:1.hypervisor,2.devicemodel,3.misc,4.doc,5.build

Tracked-On: #3482
Signed-off-by: Terry Zou <terry.zou@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

misc/tools/acrntrace/sbuf.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm/errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "sbuf.h"
+#include <errno.h>
+
+static inline bool sbuf_is_empty(shared_buf_t *sbuf)
+{
+	return (sbuf->head == sbuf->tail);
+}
+
+static inline uint32_t sbuf_next_ptr(uint32_t pos,
+		uint32_t span, uint32_t scope)
+{
+	pos += span;
+	pos = (pos >= scope) ? (pos - scope) : pos;
+	return pos;
+}
+
+int sbuf_get(shared_buf_t *sbuf, uint8_t *data)
+{
+	const void *from;
+
+	if ((sbuf == NULL) || (data == NULL))
+		return -EINVAL;
+
+	if (sbuf_is_empty(sbuf)) {
+		/* no data available */
+		return 0;
+	}
+
+	from = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
+
+	memcpy(data, from, sbuf->ele_size);
+
+	sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
+
+	return sbuf->ele_size;
+}
+
+int sbuf_write(int fd, shared_buf_t *sbuf)
+{
+	const void *start;
+	int written;
+
+	if (sbuf == NULL)
+		return -EINVAL;
+
+	if (sbuf_is_empty(sbuf)) {
+		return 0;
+	}
+
+	start = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
+        written = write(fd, start, sbuf->ele_size);
+	if (written != sbuf->ele_size) {
+		printf("Failed to write: ret %d (ele_size %d), errno %d\n",
+			written, sbuf->ele_size, (written == -1) ? errno : 0);
+		return -1;
+	}
+
+	sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
+
+	return sbuf->ele_size;
+}
+
+int sbuf_clear_buffered(shared_buf_t *sbuf)
+{
+	if (sbuf == NULL)
+		return -EINVAL;
+
+	sbuf->head = sbuf->tail;
+
+	return 0;
+}