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/******************************************************************************
* Copyright (c) 2013-2014, Texas Instruments Incorporated - http://www.ti.com/
* 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 Texas Instruments Incorporated 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.
*****************************************************************************/
#include <stdint.h>
#ifndef _SHMEM_H
#define _SHMEM_H
extern "C"
{
#include <mpm_transport.h>
}
#include "dspmem.h"
/*=============================================================================
* Abstract class for Shared memory
*============================================================================*/
class shmem
{
public:
shmem ();
virtual ~shmem ();
virtual void configure_base(DSPDevicePtr64 dsp_addr, uint64_t size);
virtual void configure (DSPDevicePtr64 dsp_addr, uint64_t size) = 0;
virtual void *map (DSPDevicePtr64 dsp_addr, uint32_t size,
bool is_read=false) = 0;
virtual void unmap (void* host_addr, uint32_t size,
bool is_write=false) = 0;
uint32_t page_size ();
DSPDevicePtr64 start () { return p_dsp_addr; }
int64_t size () { return p_size; }
protected:
DSPDevicePtr64 p_dsp_addr;
int64_t p_size;
uint32_t p_page_size;
int32_t p_mmap_fd;
mpm_transport_h p_mpm_transport_handle;
};
/*=============================================================================
* Peristent implementation of shmem
*============================================================================*/
class shmem_persistent : public shmem
{
public:
shmem_persistent ();
~shmem_persistent ();
void configure(DSPDevicePtr64 dsp_addr, uint64_t size);
virtual void *map (DSPDevicePtr64 dsp_addr, uint32_t size, bool is_read=false);
virtual void unmap (void* host_addr, uint32_t size, bool is_write=false);
private:
void * p_host_addr;
void * p_xlate_dsp_to_host_offset;
};
/*=============================================================================
* On Demand implementation of shmem
*============================================================================*/
class shmem_ondemand : public shmem
{
public:
shmem_ondemand ();
~shmem_ondemand ();
void configure(DSPDevicePtr64 dsp_addr, uint64_t size);
virtual void *map (DSPDevicePtr64 dsp_addr, uint32_t size, bool is_read=false);
virtual void unmap (void* host_addr, uint32_t size, bool is_write=false);
};
/*=============================================================================
* Peristent implementation of shmem using CMem
*============================================================================*/
class shmem_cmem_persistent : public shmem
{
public:
shmem_cmem_persistent (int cmem_block);
~shmem_cmem_persistent ();
void configure(DSPDevicePtr64 dsp_addr, uint64_t size);
virtual void *map (DSPDevicePtr64 dsp_addr, uint32_t size, bool is_read=false);
virtual void unmap (void* host_addr, uint32_t size, bool is_write=false);
static void cmem_init(DSPDevicePtr64* addr1, uint64_t* size1,
DSPDevicePtr* addr2, uint32_t* size2,
DSPDevicePtr64* addr3, uint64_t* size3);
static void cmem_exit();
private:
void * p_host_addr;
int64_t p_xlate_dsp_to_host_offset;
int p_cmem_block;
};
/*=============================================================================
* Ondemand implementation of shmem using CMem
*============================================================================*/
class shmem_cmem_ondemand : public shmem
{
public:
shmem_cmem_ondemand () {}
~shmem_cmem_ondemand () {}
void configure(DSPDevicePtr64 dsp_addr, uint64_t size);
virtual void *map (DSPDevicePtr64 dsp_addr, uint32_t size, bool is_read=false);
virtual void unmap (void* host_addr, uint32_t size, bool is_write=false);
static DSPDevicePtr64 cmem_malloc(uint64_t size);
static void cmem_free (DSPDevicePtr64 addr);
};
#endif // _SHMEM_H
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