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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.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 Cavium Inc. 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, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
#ifndef __CVMX_SHMEM_H__
#define __CVMX_SHMEM_H__
/**
* @file
*
* cvmx-shmem provides APIs for setting up shared memory between Linux
* and simple executive applications.
*
* <hr>$Revision: 41586 $<hr>
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "cvmx-spinlock.h"
#define CVMX_SHMEM_NUM_DSCPTR 8
#define CVMX_SHMEM_DSCPTR_NAME "SMDR"
#define CVMX_SHMEM_O_RDONLY 0x00
#define CVMX_SHMEM_O_WRONLY 0x01
#define CVMX_SHMEM_O_RDWR 0x02
#define CVMX_SHMEM_O_CREAT 0x04
#define CVMX_SHMEM_MAP_PROT_READ 0x01
#define CVMX_SHMEM_MAP_PROT_WRITE 0x02
#define CVMX_SHMEM_MAP_EXEC 0x04
#define CVMX_SHMEM_OWNER_NONE 0xff
#define CVMX_SHMEM_VADDR64_START 0x500000000ULL
#define CVMX_SHMEM_VADDR64_END 0x600000000ULL
#define CVMX_SHMEM_VADDR32_START 0x10000000
#define CVMX_SHMEM_VADDR32_END 0x18000000
struct cvmx_shmem_dscptr {
cvmx_spinlock_t lock;
uint64_t owner: 8;
uint64_t is_named_block: 1;
uint64_t p_wronly: 1;
uint64_t p_rdwr: 1;
int32_t use_count; /* must use atomic operation to maintain count */
const char *name;
void *vaddr;
uint64_t paddr;
uint32_t size;
uint64_t alignment;
};
struct cvmx_shmem_smdr {
cvmx_spinlock_t lock;
struct cvmx_shmem_dscptr shmd[CVMX_SHMEM_NUM_DSCPTR];
void *break64; /* Keep track of unused 64 bit virtual address space */
};
struct cvmx_shmem_smdr *cvmx_shmem_init(void);
/**
* Create a piece memory out of named block
*
* @param name Named block name
* @param flag create flag
*/
struct cvmx_shmem_dscptr *cvmx_shmem_named_block_open(char *name, uint32_t size, int oflag);
/**
* Update TLB mapping based on the descriptor
*/
void* cvmx_shmem_map(struct cvmx_shmem_dscptr *desc, int pflag);
/**
* Remove the TLB mapping created for the descriptor
*/
void cvmx_shmem_unmap(struct cvmx_shmem_dscptr *desc);
/**
* Close the share memory,
*
* @Param remove Remove the named block if it is created by the application
*/
int cvmx_shmem_close(struct cvmx_shmem_dscptr *desc, int remove);
/**
* Debug function, dump all SMDR descriptors
*/
void cvmx_shmem_show(void);
#ifdef __cplusplus
}
#endif
#endif
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