140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
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/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Networks nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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#ifndef __CVMX_SHMEM_H__
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#define __CVMX_SHMEM_H__
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/**
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* @file
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*
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* cvmx-shmem provides APIs for setting up shared memory between Linux
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* and simple executive applications.
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*
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* <hr>$Revision: 41586 $<hr>
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "cvmx-spinlock.h"
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#define CVMX_SHMEM_NUM_DSCPTR 8
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#define CVMX_SHMEM_DSCPTR_NAME "SMDR"
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#define CVMX_SHMEM_O_RDONLY 0x00
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#define CVMX_SHMEM_O_WRONLY 0x01
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#define CVMX_SHMEM_O_RDWR 0x02
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#define CVMX_SHMEM_O_CREAT 0x04
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#define CVMX_SHMEM_MAP_PROT_READ 0x01
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#define CVMX_SHMEM_MAP_PROT_WRITE 0x02
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#define CVMX_SHMEM_MAP_EXEC 0x04
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#define CVMX_SHMEM_OWNER_NONE 0xff
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#define CVMX_SHMEM_VADDR64_START 0x500000000ULL
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#define CVMX_SHMEM_VADDR64_END 0x600000000ULL
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#define CVMX_SHMEM_VADDR32_START 0x10000000
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#define CVMX_SHMEM_VADDR32_END 0x18000000
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struct cvmx_shmem_dscptr {
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cvmx_spinlock_t lock;
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uint64_t owner: 8;
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uint64_t is_named_block: 1;
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uint64_t p_wronly: 1;
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uint64_t p_rdwr: 1;
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int32_t use_count; /* must use atomic operation to maintain count */
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const char *name;
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void *vaddr;
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uint64_t paddr;
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uint32_t size;
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uint64_t alignment;
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};
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struct cvmx_shmem_smdr {
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cvmx_spinlock_t lock;
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struct cvmx_shmem_dscptr shmd[CVMX_SHMEM_NUM_DSCPTR];
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void *break64; /* Keep track of unused 64 bit virtual address space */
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};
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struct cvmx_shmem_smdr *cvmx_shmem_init(void);
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/**
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* Create a piece memory out of named block
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*
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* @param name Named block name
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* @param flag create flag
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*/
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struct cvmx_shmem_dscptr *cvmx_shmem_named_block_open(char *name, uint32_t size, int oflag);
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/**
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* Update TLB mapping based on the descriptor
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*/
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void* cvmx_shmem_map(struct cvmx_shmem_dscptr *desc, int pflag);
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/**
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* Remove the TLB mapping created for the descriptor
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*/
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void cvmx_shmem_unmap(struct cvmx_shmem_dscptr *desc);
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/**
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* Close the share memory,
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*
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* @Param remove Remove the named block if it is created by the application
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*/
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int cvmx_shmem_close(struct cvmx_shmem_dscptr *desc, int remove);
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/**
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* Debug function, dump all SMDR descriptors
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*/
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void cvmx_shmem_show(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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