62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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/*
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* QEMU ARM CPU -- interface for the Arm v8M IDAU
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*
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* Copyright (c) 2018 Linaro Ltd
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* In the v8M architecture, the IDAU is a small piece of hardware
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* typically implemented in the SoC which provides board or SoC
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* specific security attribution information for each address that
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* the CPU performs MPU/SAU checks on. For QEMU, we model this with a
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* QOM interface which is implemented by the board or SoC object and
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* connected to the CPU using a link property.
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*/
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#ifndef TARGET_ARM_IDAU_H
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#define TARGET_ARM_IDAU_H
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#include "qom/object.h"
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#define TYPE_IDAU_INTERFACE "idau-interface"
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#define IDAU_INTERFACE(obj) \
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INTERFACE_CHECK(IDAUInterface, (obj), TYPE_IDAU_INTERFACE)
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#define IDAU_INTERFACE_CLASS(class) \
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OBJECT_CLASS_CHECK(IDAUInterfaceClass, (class), TYPE_IDAU_INTERFACE)
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#define IDAU_INTERFACE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(IDAUInterfaceClass, (obj), TYPE_IDAU_INTERFACE)
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typedef struct IDAUInterface {
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Object parent;
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} IDAUInterface;
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#define IREGION_NOTVALID -1
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typedef struct IDAUInterfaceClass {
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InterfaceClass parent;
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/* Check the specified address and return the IDAU security information
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* for it by filling in iregion, exempt, ns and nsc:
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* iregion: IDAU region number, or IREGION_NOTVALID if not valid
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* exempt: true if address is exempt from security attribution
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* ns: true if the address is NonSecure
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* nsc: true if the address is NonSecure-callable
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*/
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void (*check)(IDAUInterface *ii, uint32_t address, int *iregion,
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bool *exempt, bool *ns, bool *nsc);
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} IDAUInterfaceClass;
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#endif
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