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external/nrf_cc310/include/ssi_pal_dma.h
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external/nrf_cc310/include/ssi_pal_dma.h
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/**************************************************************************************
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* Copyright (c) 2016-2017, ARM Limited or its affiliates. All rights reserved *
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* *
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* This file and the related binary are licensed under the following license: *
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* *
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* ARM Object Code and Header Files License, v1.0 Redistribution. *
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* *
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* Redistribution and use of object code, header files, and documentation, without *
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* modification, are permitted provided that the following conditions are met: *
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* *
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* 1) Redistributions must reproduce the above copyright notice and the *
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* following disclaimer in the documentation and/or other materials *
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* provided with the distribution. *
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* *
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* 2) Unless to the extent explicitly permitted by law, no reverse *
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* engineering, decompilation, or disassembly of is permitted. *
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* *
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* 3) Redistribution and use is permitted solely for the purpose of *
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* developing or executing applications that are targeted for use *
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* on an ARM-based product. *
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* *
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* DISCLAIMER. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND *
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* CONTRIBUTORS "AS IS." ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT *
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* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT, *
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, *
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED *
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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**************************************************************************************/
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#ifndef _SSI_PAL_DMA_H
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#define _SSI_PAL_DMA_H
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/*!
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@file
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@brief This file contains definitions that are used for the DMA related APIs. The implementation of these functions
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need to be replaced according to Platform and OS.
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@defgroup ssi_pal_dma CryptoCell PAL DMA related APIs
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@{
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@ingroup ssi_pal
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*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "ssi_pal_types.h"
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#include "ssi_pal_dma_plat.h"
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#include "ssi_pal_dma_defs.h"
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/*! User buffer scatter information. */
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typedef struct {
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SaSiDmaAddr_t blockPhysAddr; /*!< Physical address.*/
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uint32_t blockSize; /*!< Block size.*/
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}SaSi_PalDmaBlockInfo_t;
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#ifdef BIG__ENDIAN
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/*! Defintion for big to little endian. */
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#define SET_WORD_LE(val) cpu_to_le32(val)
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#else
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/*! Defintion for big to little endian. */
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#define SET_WORD_LE
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#endif
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/**
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* @brief This function is called by the ARM TrustZone CryptoCell TEE runtime library before the HW is used.
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* It maps a given data buffer (virtual address) for ARM TrustZone CryptoCell TEE HW DMA use (physical address), and returns the list of
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* one or more DMA-able (physical) blocks. It may lock the buffer for ARM TrustZone CryptoCell TEE HW use. Once it is called,
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* only ARM TrustZone CryptoCell TEE HW access to the buffer is allowed, until it is unmapped.
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* If the data buffer was already mapped by the Secure OS prior to calling the ARM TrustZone CryptoCell TEE runtime library,
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* this API does not have to perform any actual mapping operation, but only return the list of DMA-able blocks.
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*
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* @return A non-zero value in case of failure.
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*/
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uint32_t SaSi_PalDmaBufferMap(uint8_t *pDataBuffer, /*!< [in] Address of the buffer to map. */
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uint32_t buffSize, /*!< [in] Buffer size in bytes. */
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SaSi_PalDmaBufferDirection_t copyDirection, /*!< [in] Copy direction of the buffer, according to ::SaSi_PalDmaBufferDirection_t,
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<ul><li>TO_DEVICE - the original buffer is the input to the operation,
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and this function should copy it to the temp buffer,
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prior to the activating the HW on the temp buffer.</li>
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<li>FROM_DEVICE - not relevant for this API.</li>
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<li>BI_DIRECTION - used when the crypto operation is "in-place", meaning
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the result of encryption or decryption is written over the original data
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at the same address. Should be treated by this API same as
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TO_DEVICE. </li></ul> */
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uint32_t *pNumOfBlocks, /*!< [in/out] Maximum numOfBlocks to fill, as output the actual number. */
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SaSi_PalDmaBlockInfo_t *pDmaBlockList, /*!< [out] List of DMA-able blocks that the buffer maps to. */
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SaSi_PalDmaBufferHandle *dmaBuffHandle /*!< [out] A handle to the mapped buffer private resources.*/ );
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/**
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* @brief This function is called by the ARM TrustZone CryptoCell TEE runtime library after the HW is used.
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* It unmaps a given buffer, and frees its associated resources, if needed. It may unlock the buffer and flush it for CPU use.
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* Once it is called, ARM TrustZone CryptoCell TEE HW does not require access to this buffer anymore.
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* If the data buffer was already mapped by the Secure OS prior to calling the ARM TrustZone CryptoCell TEE runtime library, this API does
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* not have to perform any un-mapping operation, and the actual un-mapping can be done by the Secure OS outside the context
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* of the ARM TrustZone CryptoCell TEE runtime library.
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* @return A non-zero value in case of failure.
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*/
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uint32_t SaSi_PalDmaBufferUnmap(uint8_t *pDataBuffer, /*!< [in] Address of the buffer to unmap. */
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uint32_t buffSize, /*!< [in] Buffer size in bytes. */
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SaSi_PalDmaBufferDirection_t copyDirection, /*!< [in] Copy direction of the buffer, according to ::SaSi_PalDmaBufferDirection_t
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<ul><li>TO_DEVICE - not relevant for this API. </li>
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<li>FROM_DEVICE - the temp buffer holds the output of the HW, and this
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API should copy it to the actual output buffer.</li>
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<li>BI_DIRECTION - used when the crypto operation is "in-place", meaning
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the result of encryption or decryption is written over the original data
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at the same address. Should be treated by this API same as
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FROM_DEVICE.</li></ul> */
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uint32_t numOfBlocks, /*!< [in] Number of DMA-able blocks that the buffer maps to. */
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SaSi_PalDmaBlockInfo_t *pDmaBlockList, /*!< [in] List of DMA-able blocks that the buffer maps to. */
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SaSi_PalDmaBufferHandle dmaBuffHandle /*!< [in] A handle to the mapped buffer private resources. */);
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/**
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* @brief Allocates a DMA-contiguous buffer for CPU use, and returns its virtual address.
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* Before passing the buffer to the ARM TrustZone CryptoCell TEE HW, ::SaSi_PalDmaBufferMap should be called.
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* \note The returned address must be aligned to 32 bits.
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*
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*
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* @return A non-zero value in case of failure.
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*/
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uint32_t SaSi_PalDmaContigBufferAllocate(uint32_t buffSize, /*!< [in] Buffer size in bytes.*/
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uint8_t **ppVirtBuffAddr /*!< [out] Virtual address of the allocated buffer.*/);
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/**
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* @brief Frees resources previously allocated by ::SaSi_PalDmaContigBufferAllocate.
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*
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*
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* @return A non-zero value in case of failure.
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*/
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uint32_t SaSi_PalDmaContigBufferFree(uint32_t buffSize, /*!< [in] Buffer size in Bytes. */
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uint8_t *pVirtBuffAddr /*!< [in] Virtual address of the buffer to free. */);
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/**
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* @brief Checks whether the buffer is guaranteed to be a single contiguous DMA block.
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*
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*
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* @return Returns TRUE if the buffer is guaranteed to be a single contiguous DMA block, and FALSE otherwise.
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*/
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uint32_t SaSi_PalIsDmaBufferContiguous(uint8_t *pDataBuffer, /*!< [in] User buffer address. */
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uint32_t buffSize /*!< [in] User buffer size. */);
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/**
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* @brief Maps virtual address to physical address.
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*
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*
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* @return Physical address.
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*/
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SaSiDmaAddr_t SaSi_PalMapVirtualToPhysical(uint8_t *pVirtualAddr /*!< [in] Pointer to virtual address. */);
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#ifdef __cplusplus
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}
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#endif
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/**
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@}
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*/
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#endif
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