initial import

internal commit: 14ac2bc2299032fa6714d1fefa7cf0987b3e3085 Signed-off-by: Eddie Dong <eddie.dong@intel.com>
2026-01-05 15:45:05 +00:00 · 2018-03-07 20:57:14 +08:00
parent bd31b1c53e
commit 7a3a539b17
156 changed files with 41265 additions and 0 deletions
--- a/hypervisor/lib/memcpy.c
+++ b/hypervisor/lib/memcpy.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <hv_lib.h>
+#include <acrn_common.h>
+#include <hv_arch.h>
+#include <hv_debug.h>
+
+
+/***********************************************************************
+ *
+ *   FUNCTION
+ *
+ *       memcpy_s
+ *
+ *   DESCRIPTION
+ *
+ *       Copies at most slen bytes from src address to dest address,
+ *       up to dmax.
+ *
+ *   INPUTS
+ *
+ *       d                  pointer to Destination address
+ *       dmax               maximum  length of dest
+ *       s                  pointer to Source address
+ *       slen               maximum number of bytes of src to copy
+ *
+ *   OUTPUTS
+ *
+ *       void *             pointer to destination address
+ *
+ ***********************************************************************/
+void *memcpy_s(void *d, size_t dmax, const void *s, size_t slen)
+{
+
+	uint8_t *dest8;
+	uint8_t *src8;
+
+	/*same memory block, no need to copy*/
+	if (d == s)
+		return d;
+
+	ASSERT((slen != 0) && (dmax != 0) && (dmax >= slen),
+		"invalid slen or dmax.");
+
+	ASSERT(((d > s) && (d > s + slen - 1))
+		|| ((d < s) && (s > d + dmax - 1)),
+		"overlap happened.");
+
+	dest8 = (uint8_t *)d;
+	src8 = (uint8_t *)s;
+
+	/*small data block*/
+	if (slen < 8) {
+		while (slen) {
+			*dest8++ = *src8++;
+			slen--;
+		}
+
+		return d;
+	}
+
+	/*make sure 8bytes-aligned for at least one addr.*/
+	if ((!MEM_ALIGNED_CHECK(src8, 8)) && (!MEM_ALIGNED_CHECK(dest8, 8))) {
+		for (; slen && (((uint64_t)src8) & 7); slen--)
+			*dest8++ = *src8++;
+	}
+
+	/*copy main data blocks, with rep prefix*/
+	if (slen > 8) {
+		uint32_t ecx;
+
+		asm volatile ("cld; rep; movsq"
+				: "=&c"(ecx), "=&D"(dest8), "=&S"(src8)
+				: "0" (slen / 8), "1" (dest8), "2" (src8)
+				: "memory");
+
+		slen = slen % 8;
+	}
+
+	/*tail bytes*/
+	while (slen) {
+		*dest8++ = *src8++;
+		slen--;
+	}
+
+	return d;
+}