123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Inc. (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 Inc. 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 INC. 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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/**
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* @file
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*
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* Support library for the CN31XX, CN38XX, and CN58XX hardware DFA engine.
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*
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* <hr>$Revision: 70030 $<hr>
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*/
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#include "executive-config.h"
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#ifdef CVMX_ENABLE_DFA_FUNCTIONS
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#include "cvmx-config.h"
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#include "cvmx.h"
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#include "cvmx-fau.h"
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#include "cvmx-dfa.h"
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/**
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* Initialize the DFA hardware before use
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*/
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int cvmx_dfa_initialize(void)
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{
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cvmx_dfa_difctl_t control;
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void *initial_base_address;
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cvmx_dfa_state_t initial_state;
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if (!octeon_has_feature(OCTEON_FEATURE_DFA))
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{
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cvmx_dprintf("ERROR: attempting to initialize DFA when no DFA hardware present\n.");
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return -1;
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}
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control.u64 = 0;
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control.s.dwbcnt = CVMX_FPA_DFA_POOL_SIZE / 128;
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control.s.pool = CVMX_FPA_DFA_POOL;
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control.s.size = (CVMX_FPA_DFA_POOL_SIZE - 8) / sizeof(cvmx_dfa_command_t);
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CVMX_SYNCWS;
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cvmx_write_csr(CVMX_DFA_DIFCTL, control.u64);
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initial_base_address = cvmx_fpa_alloc(CVMX_FPA_DFA_POOL);
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initial_state.u64 = 0;
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initial_state.s.base_address_div16 = (CAST64(initial_base_address))/16;
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cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, initial_state.u64);
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CVMX_SYNCWS;
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cvmx_write_csr(CVMX_DFA_DIFRDPTR, cvmx_ptr_to_phys(initial_base_address));
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return 0;
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}
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/**
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* Shutdown and cleanup resources used by the DFA
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*/
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void cvmx_dfa_shutdown(void)
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{
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void *final_base_address;
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cvmx_dfa_state_t final_state;
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CVMX_SYNCWS;
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final_state.u64 = cvmx_fau_fetch_and_add64(CVMX_FAU_DFA_STATE, 0);
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// make sure the carry is clear
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final_base_address = CASTPTR(void, (final_state.s2.base_address_div32 * 32ull));
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if (final_base_address)
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{
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cvmx_fpa_free(final_base_address, CVMX_FPA_DFA_POOL, 0);
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}
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CVMX_SYNCWS;
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final_state.u64 = 0;
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cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, final_state.u64);
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}
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#endif
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