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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/sbefw/sbeSecureMemRegionManager.H $ */
/* */
/* OpenPOWER sbe Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2017 */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#pragma once
#include <stdint.h>
#include <stddef.h>
#include "sbe_sp_intf.H"
enum class memRegionMode:uint8_t
{
READ = 0x01,
WRITE = 0x02,
};
// Structure to define a mem region
typedef struct
{
uint64_t startAddress;
uint32_t size;
uint32_t mode;
} secureMemRegion_t;
constexpr size_t MAX_NONSECURE_MEM_REGIONS = 8;
class SBESecureMemRegionManager
{
secureMemRegion_t iv_memRegions[MAX_NONSECURE_MEM_REGIONS];
size_t iv_regionsOpenCnt;
SBESecureMemRegionManager():iv_memRegions{0}
{
}
/*
* @brief getPartialRegionSize - get the overlapping region
* if it exists.
* Also if the overlap is from the beginning,
* first region is returned
*
*
* @param[in] i_region region to check for overlap
*
* @return overlapping region
*/
secureMemRegion_t getPartialRegionSize(const secureMemRegion_t i_region);
public:
// Disable copy constructors
SBESecureMemRegionManager(const SBESecureMemRegionManager&) = delete;
SBESecureMemRegionManager& operator=(const SBESecureMemRegionManager&) = delete;
static SBESecureMemRegionManager& getInstance();
/*
* @brief add - Open a new memory region
*
* @param[in] i_startAddr Start address of the memory region
* @param[in] i_size Size of the memory region
* @param[in] i_mode Bit mapped access mode of the memory region
*
* @return SBE secondary RC
*/
sbeSecondaryResponse add(const uint64_t i_startAddr,
const uint32_t i_size,
const uint8_t i_mode);
/*
* @brief remove - Close a memory region
*
* @param[in] i_startAddr Start address of the memory region
*
* @return SBE secondary RC
*/
sbeSecondaryResponse remove(const uint64_t i_startAddr);
/*
* @brief isAccessAllowed - Check if the access is allowed
*
* @param[in] i_region region to check the access for
*
* @return SBE secondary RC
*/
sbeSecondaryResponse isAccessAllowed(secureMemRegion_t i_region);
/*
* @brief closeAllRegions - close all non-secure regions
*/
void closeAllRegions()
{
iv_regionsOpenCnt = 0;
}
};
extern SBESecureMemRegionManager* SBESecMemRegionManager;
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