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Diffstat (limited to 'src/vppinfra/cache.h')
| -rw-r--r-- | src/vppinfra/cache.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/vppinfra/cache.h b/src/vppinfra/cache.h new file mode 100644 index 00000000000..8e1f9483bde --- /dev/null +++ b/src/vppinfra/cache.h @@ -0,0 +1,104 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + Copyright (c) 2005 Eliot Dresselhaus + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#ifndef included_clib_cache_h +#define included_clib_cache_h + +#include <vppinfra/error_bootstrap.h> + +/* + * Allow CFLAGS to override the arch-specific cache line size + */ +#ifndef CLIB_LOG2_CACHE_LINE_BYTES + +#if defined(__x86_64__) || defined(__ARM_ARCH_7A__) +#define CLIB_LOG2_CACHE_LINE_BYTES 6 +#endif + +#ifdef __aarch64__ +#define CLIB_LOG2_CACHE_LINE_BYTES 7 +#endif + +/* Default cache line size of 32 bytes. */ +#ifndef CLIB_LOG2_CACHE_LINE_BYTES +#define CLIB_LOG2_CACHE_LINE_BYTES 5 +#endif + +#endif /* CLIB_LOG2_CACHE_LINE_BYTES defined */ + +#if (CLIB_LOG2_CACHE_LINE_BYTES >= 9) +#error Cache line size 512 bytes or greater +#endif + +#define CLIB_CACHE_LINE_BYTES (1 << CLIB_LOG2_CACHE_LINE_BYTES) +#define CLIB_CACHE_LINE_ALIGN_MARK(mark) u8 mark[0] __attribute__((aligned(CLIB_CACHE_LINE_BYTES))) + +/* Read/write arguments to __builtin_prefetch. */ +#define CLIB_PREFETCH_READ 0 +#define CLIB_PREFETCH_LOAD 0 /* alias for read */ +#define CLIB_PREFETCH_WRITE 1 +#define CLIB_PREFETCH_STORE 1 /* alias for write */ + +#define _CLIB_PREFETCH(n,size,type) \ + if ((size) > (n)*CLIB_CACHE_LINE_BYTES) \ + __builtin_prefetch (_addr + (n)*CLIB_CACHE_LINE_BYTES, \ + CLIB_PREFETCH_##type, \ + /* locality */ 3); + +#define CLIB_PREFETCH(addr,size,type) \ +do { \ + void * _addr = (addr); \ + \ + ASSERT ((size) <= 4*CLIB_CACHE_LINE_BYTES); \ + _CLIB_PREFETCH (0, size, type); \ + _CLIB_PREFETCH (1, size, type); \ + _CLIB_PREFETCH (2, size, type); \ + _CLIB_PREFETCH (3, size, type); \ +} while (0) + +#undef _ + +#endif /* included_clib_cache_h */ + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |