priv_sys_irq_hook_exports.h

00001 /*
00002  * Copyright (c) 2016, ARM Limited, All Rights Reserved
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License"); you may
00006  * not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  * http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00013  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 #ifndef __UVISOR_API_PRIV_SYS_IRQ_HOOK_EXPORTS_H__
00018 #define __UVISOR_API_PRIV_SYS_IRQ_HOOK_EXPORTS_H__
00019 
00020 /*
00021  * Privileged system interrupt hooks
00022  *
00023  * In this version of uVisor, uVisor lives alongside an RTOS that requires
00024  * running privileged code. In order for the RTOS to run any privileged code,
00025  * uVisor must allow the RTOS to handle a subset of privileged system
00026  * interrupts. Only the following system interrupts are hookable. Code called
00027  * by these hooks circumvents uVisor security. HANDLE WITH CARE. */
00028 typedef struct {
00029     void (*priv_svc_0)(void);
00030     void (*priv_pendsv)(void);
00031     void (*priv_systick)(void);
00032 } UvisorPrivSystemIRQHooks;
00033 
00034 /* Use this macro to register privileged system IRQ hooks. If you don't want to
00035  * register a particular privileged system IRQ hook, you can supply NULL for
00036  * that hook parameter. */
00037 #define UVISOR_SET_PRIV_SYS_IRQ_HOOKS(priv_svc_0_, priv_pendsv_, priv_systick_) \
00038     UVISOR_EXTERN const UvisorPrivSystemIRQHooks __uvisor_priv_sys_irq_hooks = { \
00039         .priv_svc_0 = priv_svc_0_, \
00040         .priv_pendsv = priv_pendsv_, \
00041         .priv_systick = priv_systick_, \
00042     };
00043 
00044 #endif