1 files changed, 61 insertions, 0 deletions
diff --git a/target/arm/idau.h b/target/arm/idau.h
new file mode 100644
index 0000000000..cac27b95fa
--- /dev/null
+++ b/target/arm/idau.h
@@ -0,0 +1,61 @@
+/*
+ * QEMU ARM CPU -- interface for the Arm v8M IDAU
+ *
+ * Copyright (c) 2018 Linaro Ltd
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see
+ * <http://www.gnu.org/licenses/gpl-2.0.html>
+ *
+ * In the v8M architecture, the IDAU is a small piece of hardware
+ * typically implemented in the SoC which provides board or SoC
+ * specific security attribution information for each address that
+ * the CPU performs MPU/SAU checks on. For QEMU, we model this with a
+ * QOM interface which is implemented by the board or SoC object and
+ * connected to the CPU using a link property.
+ */
+
+#ifndef TARGET_ARM_IDAU_H
+#define TARGET_ARM_IDAU_H
+
+#include "qom/object.h"
+
+#define TYPE_IDAU_INTERFACE "idau-interface"
+#define IDAU_INTERFACE(obj) \
+    INTERFACE_CHECK(IDAUInterface, (obj), TYPE_IDAU_INTERFACE)
+#define IDAU_INTERFACE_CLASS(class) \
+    OBJECT_CLASS_CHECK(IDAUInterfaceClass, (class), TYPE_IDAU_INTERFACE)
+#define IDAU_INTERFACE_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(IDAUInterfaceClass, (obj), TYPE_IDAU_INTERFACE)
+
+typedef struct IDAUInterface {
+    Object parent;
+} IDAUInterface;
+
+#define IREGION_NOTVALID -1
+
+typedef struct IDAUInterfaceClass {
+    InterfaceClass parent;
+
+    /* Check the specified address and return the IDAU security information
+     * for it by filling in iregion, exempt, ns and nsc:
+     *  iregion: IDAU region number, or IREGION_NOTVALID if not valid
+     *  exempt: true if address is exempt from security attribution
+     *  ns: true if the address is NonSecure
+     *  nsc: true if the address is NonSecure-callable
+     */
+    void (*check)(IDAUInterface *ii, uint32_t address, int *iregion,
+                  bool *exempt, bool *ns, bool *nsc);
+} IDAUInterfaceClass;
+
+#endif