| 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 | typedef struct IDAUInterfaceClass IDAUInterfaceClass; |
| 37 | DECLARE_CLASS_CHECKERS(IDAUInterfaceClass, IDAU_INTERFACE, |
| 38 | TYPE_IDAU_INTERFACE) |
| 39 | |
| 40 | typedef struct IDAUInterface IDAUInterface; |
| 41 | |
| 42 | #define IREGION_NOTVALID -1 |
| 43 | |
| 44 | struct IDAUInterfaceClass { |
| 45 | InterfaceClass parent; |
| 46 | |
| 47 | /* Check the specified address and return the IDAU security information |
| 48 | * for it by filling in iregion, exempt, ns and nsc: |
| 49 | * iregion: IDAU region number, or IREGION_NOTVALID if not valid |
| 50 | * exempt: true if address is exempt from security attribution |
| 51 | * ns: true if the address is NonSecure |
| 52 | * nsc: true if the address is NonSecure-callable |
| 53 | */ |
| 54 | void (*check)(IDAUInterface *ii, uint32_t address, int *iregion, |
| 55 | bool *exempt, bool *ns, bool *nsc); |
| 56 | }; |
| 57 | |
| 58 | #endif |