M68K_SYNC_ICACHE(2) BSD/m68k System Calls Manual M68K_SYNC_ICACHE(2)NAME
m68k_sync_icache -- instruction cache synchronization
LIBRARY
m68k Architecture Library (libm68k, -lm68k)
SYNOPSIS
#include <sys/types.h>
#include <m68k/sync_icache.h>
void
m68k_sync_icache(void *start, size_t size);
DESCRIPTION
m68k_sync_icache() synchronizes data and instruction caches over the specified region. It should be called prior to executing newly gener-
ated code.
The affected address range starts at start and continues for size bytes. If start is 0, all the address space of the current execution
thread is affected. Addresses outside the specified region may be synchronized, too.
The call always succeeds.
SEE ALSO arm_sync_icache(2)HISTORY
m68k_sync_icache() appeared first in NetBSD 1.4.
AUTHORS
Ignatios Souvatzis
BSD February 9, 1998 BSD
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
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <libkern/OSCacheControl.h>
int
sys_cache_control(int function, void *start, size_t len);
void
sys_icache_invalidate(void *start, size_t len);
void
sys_dcache_flush(void *start, size_t len);
DESCRIPTION
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.
RETURN VALUES
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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