cacheflush.2

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 2 代码 · 共 54 行

.TH cacheflush 2 RISC
.UC 4
.SH Name
cacheflush \- flush the instruction cache, data cache, or both
.SH Syntax
.ft B
.nf
#include <mips/cachectl.h>
.sp
cacheflush(addr, nbytes, cache)
char *addr;
int nbytes, cache;
.fi
.ft R
.SH Description
Flushes contents of indicated caches for
user addresses in the range of
.I addr
to
.RI ( addr + nbytes \-1).
The
.I cache
parameter is one of the following:
.TP 15
ICACHE
Flush only the instruction cache.
.TP 15
DCACHE
Flush only the data cache.
.TP 15
BCACHE
Flush both the instruction and data caches.
.SH Return Values
The 
.PN cacheflush
system call returns 0 when errors are not detected.  If errors are detected,
the 
.PN cacheflush
system call returns \-1 with the error cause indicated in
.IR errno.
.SH Diagnostics
.TP 15
[EFAULT]
Some or all of the address range in the
.I addr
to
.RI ( addr + nbytes \-1)
are not accessible.
.TP 15
[EINVAL]
The 
.I cache
parameter is not ICACHE, DCACHE, or BCACHE.