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