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Diffstat (limited to 'src/vendorcode/cavium/include/bdk/libbdk-hal/bdk-l2c.h')
-rw-r--r-- | src/vendorcode/cavium/include/bdk/libbdk-hal/bdk-l2c.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/vendorcode/cavium/include/bdk/libbdk-hal/bdk-l2c.h b/src/vendorcode/cavium/include/bdk/libbdk-hal/bdk-l2c.h new file mode 100644 index 0000000000..cf14357f83 --- /dev/null +++ b/src/vendorcode/cavium/include/bdk/libbdk-hal/bdk-l2c.h @@ -0,0 +1,179 @@ +/***********************license start*********************************** +* Copyright (c) 2003-2017 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 + * + * Interface to the Level 2 Cache (L2C) control, measurement, and debugging + * facilities. + * + * <hr>$Revision: 50663 $<hr> + * + * @addtogroup hal + * @{ + */ + +/** + * Perform one time initialization of L2 for improved + * performance. This can be called after L2 is in use. + * + * @return Zero on success, negative on failure. + */ +int bdk_l2c_initialize(bdk_node_t node); + +/** + * Return the L2 Cache way partitioning for a given core. + * + * @param node Node to use in a Numa setup. Can be an exact ID or a special + * value. + * @param core The core processor of interest. + * + * @return The mask specifying the partitioning. 0 bits in mask indicates + * the cache 'ways' that a core can evict from. + * -1 on error + */ +int bdk_l2c_get_core_way_partition(bdk_node_t node, int core); + +/** + * Partitions the L2 cache for a core + * + * @param node Node to use in a Numa setup. Can be an exact ID or a special + * value. + * @param core The core that the partitioning applies to. + * @param mask The partitioning of the ways expressed as a binary mask. A 0 bit allows the core + * to evict cache lines from a way, while a 1 bit blocks the core from evicting any lines + * from that way. There must be at least one allowed way (0 bit) in the mask. + * + * @note If any ways are blocked for all cores and the HW blocks, then those ways will never have + * any cache lines evicted from them. All cores and the hardware blocks are free to read from + * all ways regardless of the partitioning. + */ +int bdk_l2c_set_core_way_partition(bdk_node_t node, int core, uint32_t mask); + +/** + * Return the L2 Cache way partitioning for the hw blocks. + * + * @param node Node to use in a Numa setup. Can be an exact ID or a special value. + * @return The mask specifying the reserved way. 0 bits in mask indicates + * the cache 'ways' that a core can evict from. + * -1 on error + */ +int bdk_l2c_get_hw_way_partition(bdk_node_t node); + +/** + * Partitions the L2 cache for the hardware blocks. + * + * @param node Node to use in a Numa setup. Can be an exact ID or a special + * value. + * @param mask The partitioning of the ways expressed as a binary mask. A 0 bit allows the core + * to evict cache lines from a way, while a 1 bit blocks the core from evicting any lines + * from that way. There must be at least one allowed way (0 bit) in the mask. + * + * @note If any ways are blocked for all cores and the HW blocks, then those ways will never have + * any cache lines evicted from them. All cores and the hardware blocks are free to read from + * all ways regardless of the partitioning. + */ +int bdk_l2c_set_hw_way_partition(bdk_node_t node, uint32_t mask); + +/** + * Locks a specified memory region in the L2 cache. + * + * Note that if not all lines can be locked, that means that all + * but one of the ways (associations) available to the locking + * core are locked. Having only 1 association available for + * normal caching may have a significant adverse affect on performance. + * Care should be taken to ensure that enough of the L2 cache is left + * unlocked to allow for normal caching of DRAM. + * + * @param node Node to use in a Numa setup. Can be an exact ID or a special + * value. + * @param start Physical address of the start of the region to lock + * @param len Length (in bytes) of region to lock + * + * @return Number of requested lines that where not locked. + * 0 on success (all locked) + */ +int bdk_l2c_lock_mem_region(bdk_node_t node, uint64_t start, uint64_t len); + +/** + * Unlocks a region of memory that is locked in the L2 cache + * + * @param node Node to use in a Numa setup. Can be an exact ID or a special + * value. + * @param start start physical address + * @param len length (in bytes) to unlock + * + * @return Number of locked lines that the call unlocked + */ +int bdk_l2c_unlock_mem_region(bdk_node_t node, uint64_t start, uint64_t len); + +/** + * Flushes (and unlocks) the entire L2 cache. + */ +void bdk_l2c_flush(bdk_node_t node); + +/** + * + * @return Returns the size of the L2 cache in bytes, + * -1 on error (unrecognized model) + */ +int bdk_l2c_get_cache_size_bytes(bdk_node_t node); + +/** + * Return the number of sets in the L2 Cache + * + * @return + */ +int bdk_l2c_get_num_sets(bdk_node_t node); + +/** + * Return the number of associations in the L2 Cache + * + * @return + */ +int bdk_l2c_get_num_assoc(bdk_node_t node); + +/** + * Return true if the BDK has locked itself in L2 + * + * @return + */ +int bdk_l2c_is_locked(bdk_node_t node); + +/** @} */ |