ARM_SYNC_ICACHE(2) | System Calls Manual (arm) | ARM_SYNC_ICACHE(2) |
arm_sync_icache
—
#include <machine/sysarch.h>
int
arm_sync_icache
(uintptr_t
addr, size_t
len);
arm_sync_icache
() will make sure that all the entries in
the processor instruction cache are synchronized with main memory and that any
data in a write back cache has been cleaned. Some ARM processors (e.g. SA110)
have separate instruction and data caches thus any dynamically generated or
modified code needs to be written back from any data caches to main memory and
the instruction cache needs to be synchronized with main memory.
On such processors arm_sync_icache
() will
clean the data cache and invalidate the processor instruction cache to force
reloading from main memory. On processors that have a shared instruction and
data cache and have a write through cache (e.g. ARM6) no action needs to be
taken.
The routine takes a start address addr and a length len to describe the area of memory that needs to be cleaned and synchronized.
arm_sync_icache
() will never fail so will always return
0.
January 17, 2014 | NetBSD 9.2 |