SQ_FLUSH_RANGE(9) Memory Management SQ_FLUSH_RANGE(9)NAME
sq_flush_range - Flush (prefetch) a specific SQ range
void sq_flush_range(unsigned long start, unsigned int len);
the store queue address to start flushing from
the length to flush
Flushes the store queue cache from start to start + len in a linear fashion.
Paul Mundt <firstname.lastname@example.org>
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SQ_FLUSH_RANGE(9)
Check Out this Related Man Page
CACHE(3) BSD Library Functions Manual CACHE(3)NAME
sys_cache_control, sys_icache_invalidate, sys_dcache_flush -- cache control
Standard C Library (libc, -lc)
sys_cache_control(int function, void *start, size_t len);
sys_icache_invalidate(void *start, size_t len);
sys_dcache_flush(void *start, size_t len);
These functions operate on every cache line containing one of the len bytes of memory pointed to by start. Normally the operations apply to
every processor in the system, but the exact semantics of these operations is platform dependent. They should be used with caution.
sys_cache_control() performs the operation specified by function. Refer to the header file for a list of currently supported functions.
sys_icache_invalidate() prepares memory for execution, typically by invalidating the instruction cache for the indicated range. This should
be called after writing machine instructions to memory, and before executing them. On IA32 processors this function is a NOP, because their
instruction caches are coherent.
sys_dcache_flush() writes modified data cache lines to main memory, and then invalidates all lines in the range being operated on. It can be
useful when dealing with cache incoherent devices or DMA.
sys_cache_control() returns zero on success, ENOTSUP if function is not valid.
SEE ALSO atomic(3), barrier(3)HISTORY
These functions first appeared in Mac OS 10.5 (Leopard).
Darwin September 21, 2006 Darwin
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