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/target/arm/arm_ldst.h b/target/arm/arm_ldst.h
new file mode 100644
index 000000000..cee0548a1
--- /dev/null
+++ b/target/arm/arm_ldst.h
@@ -0,0 +1,47 @@
+/*
+ * ARM load/store instructions for code (armeb-user support)
+ *
+ *  Copyright (c) 2012 CodeSourcery, LLC
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ARM_LDST_H
+#define ARM_LDST_H
+
+#include "exec/translator.h"
+#include "qemu/bswap.h"
+
+/* Load an instruction and return it in the standard little-endian order */
+static inline uint32_t arm_ldl_code(CPUARMState *env, DisasContextBase *s,
+                                    target_ulong addr, bool sctlr_b)
+{
+    return translator_ldl_swap(env, s, addr, bswap_code(sctlr_b));
+}
+
+/* Ditto, for a halfword (Thumb) instruction */
+static inline uint16_t arm_lduw_code(CPUARMState *env, DisasContextBase* s,
+                                     target_ulong addr, bool sctlr_b)
+{
+#ifndef CONFIG_USER_ONLY
+    /* In big-endian (BE32) mode, adjacent Thumb instructions have been swapped
+       within each word.  Undo that now.  */
+    if (sctlr_b) {
+        addr ^= 2;
+    }
+#endif
+    return translator_lduw_swap(env, s, addr, bswap_code(sctlr_b));
+}
+
+#endif