plan9 man page for segflush

SEGFLUSH(2)							System Calls Manual						       SEGFLUSH(2)

NAME
       segflush - flush instruction and data caches

SYNOPSIS
       #include <u.h>
       #include <libc.h>

       int  segflush(void *va, ulong len)

DESCRIPTION
       Segflush invalidates any instruction cache and writes back any data cache associated with pages contained in a segment.	All subsequent new
       pages in the segment will also be flushed when first referenced.

       Va is an address within the segment to be flushed; it is rounded down to the nearest page boundary.  Len specifies the length in  bytes	of
       the  memory  to flush; va+len is rounded up to the nearest page boundary.  Segflush works correctly when the memory straddles multiple seg-
       ments.

       Correct use of segflush depends on an understanding of the cache architecture of the specific machine.

SOURCE
       /sys/src/libc/9syscall

SEE ALSO
       segattach(2), segbrk(2)
       /proc/*/segment

DIAGNOSTICS
       Sets errstr.

																       SEGFLUSH(2)