cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cvmx-helper-spi.h (2781B)

      1/***********************license start***************
      2 * Author: Cavium Networks
      3 *
      4 * Contact: support@caviumnetworks.com
      5 * This file is part of the OCTEON SDK
      6 *
      7 * Copyright (c) 2003-2008 Cavium Networks
      8 *
      9 * This file is free software; you can redistribute it and/or modify
     10 * it under the terms of the GNU General Public License, Version 2, as
     11 * published by the Free Software Foundation.
     12 *
     13 * This file is distributed in the hope that it will be useful, but
     14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
     15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
     16 * NONINFRINGEMENT.  See the GNU General Public License for more
     17 * details.
     18 *
     19 * You should have received a copy of the GNU General Public License
     20 * along with this file; if not, write to the Free Software
     21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
     22 * or visit http://www.gnu.org/licenses/.
     23 *
     24 * This file may also be available under a different license from Cavium.
     25 * Contact Cavium Networks for more information
     26 ***********************license end**************************************/
     27
     28/*
     29 * Functions for SPI initialization, configuration,
     30 * and monitoring.
     31 */
     32#ifndef __CVMX_HELPER_SPI_H__
     33#define __CVMX_HELPER_SPI_H__
     34
     35/**
     36 * Probe a SPI interface and determine the number of ports
     37 * connected to it. The SPI interface should still be down after
     38 * this call.
     39 *
     40 * @interface: Interface to probe
     41 *
     42 * Returns Number of ports on the interface. Zero to disable.
     43 */
     44extern int __cvmx_helper_spi_probe(int interface);
     45extern int __cvmx_helper_spi_enumerate(int interface);
     46
     47/**
     48 * Bringup and enable a SPI interface. After this call packet I/O
     49 * should be fully functional. This is called with IPD enabled but
     50 * PKO disabled.
     51 *
     52 * @interface: Interface to bring up
     53 *
     54 * Returns Zero on success, negative on failure
     55 */
     56extern int __cvmx_helper_spi_enable(int interface);
     57
     58/**
     59 * Return the link state of an IPD/PKO port as returned by
     60 * auto negotiation. The result of this function may not match
     61 * Octeon's link config if auto negotiation has changed since
     62 * the last call to cvmx_helper_link_set().
     63 *
     64 * @ipd_port: IPD/PKO port to query
     65 *
     66 * Returns Link state
     67 */
     68extern union cvmx_helper_link_info __cvmx_helper_spi_link_get(int ipd_port);
     69
     70/**
     71 * Configure an IPD/PKO port for the specified link state. This
     72 * function does not influence auto negotiation at the PHY level.
     73 * The passed link state must always match the link state returned
     74 * by cvmx_helper_link_get().
     75 *
     76 * @ipd_port:  IPD/PKO port to configure
     77 * @link_info: The new link state
     78 *
     79 * Returns Zero on success, negative on failure
     80 */
     81extern int __cvmx_helper_spi_link_set(int ipd_port,
     82				      union cvmx_helper_link_info link_info);
     83
     84#endif