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cachectl(2) [ultrix man page]

cachectl(2)							System Calls Manual						       cachectl(2)

       cachectl - mark pages cacheable or uncacheable

       #include <mips/cachectl.h>

       cachectl(addr, nbytes, op)
       char *addr;
       int nbytes, op;

       The system call allows a process to make ranges of its address space cacheable or uncacheable.  Initially, a process's entire address space
       is cacheable.

       The op parameter is one of the following:

       CACHEABLE	   Make the indicated pages cacheable.

       UNCACHEABLE	   Make the indicated pages uncacheable.

       The arguments CACHEABLE and UNCACHEABLE affect the address range indicated by the addr and  nbytes  parameters.	 The  addr  must  be  page
       aligned, and nbytes must be a multiple of the page size.

       Changing a page from UNCACHEABLE state to CACHEABLE state causes both the instruction and data caches to be flushed.

Return Values
       The system call returns 0 on success. If errors are detected, the system call returns -1 with the error cause indicated in errno.

       [EFAULT]       Some or all of the address range addr to (addr+nbytes-1) are not accessible.

       [EINVAL]       The op parameter is not CACHEABLE or UNCACHEABLE.

       [EINVAL]       The addr parameter is not page aligned, or the nbytes parameter is not a multiple of pagesize.

4th Berkeley Distribution					       RISC							       cachectl(2)

Check Out this Related Man Page

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

cacheflush - flush contents of instruction and/or data cache SYNOPSIS
#include <asm/cachectl.h> int cacheflush(char *addr, int nbytes, int cache); DESCRIPTION
cacheflush() flushes the contents of the indicated cache(s) for the user addresses in the range addr to (addr+nbytes-1). cache may be one of: ICACHE Flush the instruction cache. DCACHE Write back to memory and invalidate the affected valid cache lines. BCACHE Same as (ICACHE|DCACHE). RETURN VALUE
cacheflush() returns 0 on success or -1 on error. If errors are detected, errno will indicate the error. ERRORS
EFAULT Some or all of the address range addr to (addr+nbytes-1) is not accessible. EINVAL cache is not one of ICACHE, DCACHE, or BCACHE. CONFORMING TO
This Linux-specific system call is available only on MIPS-based systems. It should not be used in programs intended to be portable. BUGS
The current implementation ignores the addr and nbytes arguments. Therefore, the whole cache is always flushed. COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at Linux 2007-05-26 CACHEFLUSH(2)
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