cachectl(2) System Calls Manual cachectl(2)Name
cachectl - mark pages cacheable or uncacheable
cachectl(addr, nbytes, op)
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
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.
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)NAME
cacheflush - flush contents of instruction and/or data cache
int cacheflush(char *addr, int nbytes, int cache);
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
ICACHE Flush the instruction cache.
DCACHE Write back to memory and invalidate the affected valid cache lines.
BCACHE Same as (ICACHE|DCACHE).
cacheflush() returns 0 on success or -1 on error. If errors are detected, errno will indicate the error.
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.
This Linux-specific system call is available only on MIPS-based systems. It should not be used in programs intended to be portable.
The current implementation ignores the addr and nbytes arguments. Therefore, the whole cache is always flushed.
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 http://www.kernel.org/doc/man-pages/.
Linux 2007-05-26 CACHEFLUSH(2)
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