1 files changed, 122 insertions, 0 deletions
diff --git a/sys/contrib/octeon-sdk/cvmx-dfa.c b/sys/contrib/octeon-sdk/cvmx-dfa.c
new file mode 100644
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+++ b/sys/contrib/octeon-sdk/cvmx-dfa.c
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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**************************************/
+
+
+
+
+
+
+
+/**
+ * @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