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/*
* Copyright (C) 2011-2019 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* This file is copied from
* https://github.com/intel/linux-sgx/blob/4589daddd58bec7367a6a9de3fe301e6de17671a/common/inc/internal/sgx_rsrv_mem_mngr.h
* The reason we copied here is that the official SGX SDK release has
* not included this header file yet.
*/
#pragma once
#ifndef _SGX_RSRV_MEM_MNGR_H_
#define _SGX_RSRV_MEM_MNGR_H_
#include "stdint.h"
#include "sgx_error.h"
#define SGX_PROT_READ 0x1 /* page can be read */
#define SGX_PROT_WRITE 0x2 /* page can be written */
#define SGX_PROT_EXEC 0x4 /* page can be executed */
#define SGX_PROT_NONE 0x0 /* page can not be accessed */
#ifdef __cplusplus
extern "C" {
#endif
/* Allocate a range of EPC memory from the reserved memory area with RW
* permission
*
* Parameters:
* Inputs: length [in]: Size of region to be allocated in bytes. Page aligned.
* Return: Starting address of the new allocated memory area on success;
* otherwise NULL
*/
void *
sgx_alloc_rsrv_mem(size_t length);
/* Free a range of EPC memory from the reserved memory area
*
* Parameters:
* Inputs: addr[in]: Starting address of region to be freed. Page aligned.
* length[in]: The length of the memory to be freed in bytes.
* Page aligned.
* Return: 0 on success; otherwise -1
*/
int
sgx_free_rsrv_mem(void *addr, size_t length);
/* Modify the access permissions of the pages in the reserved memory area.
*
* Parameters:
* Inputs: addr[in]: Starting address of region which needs to change access
* permission. Page aligned.
* length[in]: The length of the memory to be manipulated in bytes.
* Page aligned.
* prot[in]: The target memory protection.
* Return: sgx_status_t - SGX_SUCCESS or failure as defined in sgx_error.h
*/
sgx_status_t
sgx_tprotect_rsrv_mem(void *addr, size_t len, int prot);
#ifdef __cplusplus
}
#endif
#endif
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