1CACHEFLUSH(2)              Linux Programmer's Manual             CACHEFLUSH(2)
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NAME

6       cacheflush - flush contents of instruction and/or data cache
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SYNOPSIS

9       #include <asm/cachectl.h>
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11       int cacheflush(char *addr, int nbytes, int cache);
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DESCRIPTION

14       cacheflush()  flushes  the  contents  of the indicated cache(s) for the
15       user addresses in the range addr to (addr+nbytes-1).  cache may be  one
16       of:
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18       ICACHE Flush the instruction cache.
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20       DCACHE Write  back  to  memory  and invalidate the affected valid cache
21              lines.
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23       BCACHE Same as (ICACHE|DCACHE).
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RETURN VALUE

26       cacheflush() returns 0 on success  or  -1  on  error.   If  errors  are
27       detected, errno will indicate the error.
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ERRORS

30       EFAULT Some  or all of the address range addr to (addr+nbytes-1) is not
31              accessible.
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33       EINVAL cache is not one of ICACHE, DCACHE, or BCACHE.
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CONFORMING TO

36       This Linux-specific system call is only available on  MIPS  based  sys‐
37       tems.  It should not be used in programs intended to be portable.
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BUGS

40       The  current  implementation  ignores  the  addr  and nbytes arguments.
41       Therefore, the whole cache is always flushed.
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COLOPHON

44       This page is part of release 3.22 of the Linux  man-pages  project.   A
45       description  of  the project, and information about reporting bugs, can
46       be found at http://www.kernel.org/doc/man-pages/.
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50Linux                             2007-05-26                     CACHEFLUSH(2)