diff options
Diffstat (limited to 'c/src/lib/libcpu')
-rw-r--r-- | c/src/lib/libcpu/shared/src/cache_manager.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/shared/src/cache_manager.c b/c/src/lib/libcpu/shared/src/cache_manager.c index 202ea8e1ba..00d2476fa9 100644 --- a/c/src/lib/libcpu/shared/src/cache_manager.c +++ b/c/src/lib/libcpu/shared/src/cache_manager.c @@ -469,3 +469,45 @@ rtems_cache_disable_instruction( void ) _CPU_cache_disable_instruction(); #endif } + +/* Returns the maximal cache line size of all cache kinds in bytes. */ +size_t rtems_cache_get_maximal_line_size( void ) +{ +#if defined(CPU_MAXIMAL_CACHE_ALIGNMENT) + return CPU_MAXIMAL_CACHE_ALIGNMENT; +#endif + size_t max_line_size = 0; +#if defined(CPU_DATA_CACHE_ALIGNMENT) + { + size_t data_line_size = CPU_DATA_CACHE_ALIGNMENT; + if ( max_line_size < data_line_size ) + max_line_size = data_line_size; + } +#endif +#if defined(CPU_INSTRUCTION_CACHE_ALIGNMENT) + { + size_t instruction_line_size = CPU_INSTRUCTION_CACHE_ALIGNMENT; + if ( max_line_size < instruction_line_size ) + max_line_size = instruction_line_size; + } +#endif + return max_line_size; +} + +/* + * Purpose is to synchronize caches after code has been loaded + * or self modified. Actual implementation is simple only + * but it can and should be repaced by optimized version + * which does not need flush and invalidate all cache levels + * when code is changed. + */ +void +rtems_cache_instruction_sync_after_code_change( const void * code_addr, size_t n_bytes ) +{ +#if defined(CPU_CACHE_SUPPORT_PROVIDES_INSTRUCTION_SYNC_FUNCTION) + _CPU_cache_instruction_sync_after_code_change( code_addr, n_bytes ); +#else + rtems_cache_flush_multiple_data_lines( code_addr, n_bytes ); + rtems_cache_invalidate_multiple_instruction_lines( code_addr, n_bytes ); +#endif +} |