1 /* 2 * QEMU ARM CPU -- interface for the Arm v8M IDAU 3 * 4 * Copyright (c) 2018 Linaro Ltd 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see 18 * <http://www.gnu.org/licenses/gpl-2.0.html> 19 * 20 * In the v8M architecture, the IDAU is a small piece of hardware 21 * typically implemented in the SoC which provides board or SoC 22 * specific security attribution information for each address that 23 * the CPU performs MPU/SAU checks on. For QEMU, we model this with a 24 * QOM interface which is implemented by the board or SoC object and 25 * connected to the CPU using a link property. 26 */ 27 28 #ifndef TARGET_ARM_IDAU_H 29 #define TARGET_ARM_IDAU_H 30 31 #include "qom/object.h" 32 33 #define TYPE_IDAU_INTERFACE "idau-interface" 34 #define IDAU_INTERFACE(obj) \ 35 INTERFACE_CHECK(IDAUInterface, (obj), TYPE_IDAU_INTERFACE) 36 #define IDAU_INTERFACE_CLASS(class) \ 37 OBJECT_CLASS_CHECK(IDAUInterfaceClass, (class), TYPE_IDAU_INTERFACE) 38 #define IDAU_INTERFACE_GET_CLASS(obj) \ 39 OBJECT_GET_CLASS(IDAUInterfaceClass, (obj), TYPE_IDAU_INTERFACE) 40 41 typedef struct IDAUInterface IDAUInterface; 42 43 #define IREGION_NOTVALID -1 44 45 typedef struct IDAUInterfaceClass { 46 InterfaceClass parent; 47 48 /* Check the specified address and return the IDAU security information 49 * for it by filling in iregion, exempt, ns and nsc: 50 * iregion: IDAU region number, or IREGION_NOTVALID if not valid 51 * exempt: true if address is exempt from security attribution 52 * ns: true if the address is NonSecure 53 * nsc: true if the address is NonSecure-callable 54 */ 55 void (*check)(IDAUInterface *ii, uint32_t address, int *iregion, 56 bool *exempt, bool *ns, bool *nsc); 57 } IDAUInterfaceClass; 58 59 #endif 60