rtapi_region

NAME

rtapi_region — functions to manage I/O memory regions

SYNTAX

void * rtapi_request_region ( unsigned long base, unsigned long int size, const char *name )

void rtapi_release_region ( unsigned long base, unsigned long int size )

ARGUMENTS

base
The base address of the I/O region

size
The size of the I/O region

name
The name to be shown in /proc/ioports

DESCRIPTION

rtapi_request_region reserves I/O memory starting at base and going for size bytes.

REALTIME CONSIDERATIONS

May be called from realtime init/cleanup code only.

BUGS

On kernels before 2.4.0, rtapi_request_region always suceeds.

RETURN VALUE

rtapi_request_region returns NULL if the allocation fails, and a non-NULL value otherwise.

rtapi_release_region has no return value.