17.5.13 Idle routine information

The idle routine information defines Attribute: idlatr, Start address: idlrtn for an idle routine.

The number of idle routine information items that can be specified is defined as being within the range of 0 to 1.

The following shows the idle routine information format.

VATT_IDL ({ idlatr, idlrtn });

The items constituting the idle routine information are as follows.

1 ) Attribute: idlatr

Specifies the language used to describe an idle routine.
The keyword that can be specified for idlatr is TA_HLNG or TA_ASM.

TA_HLNG: Start an idle routine through a C language interface.

TA_ASM: Start an idle routine through an assembly language interface.

2 ) Start address: idlrtn

Specifies the start address for an idle routine.
A value from 0x0 to 0xfffffffe (aligned to a 2-byte boundary), or a symbol name, can be specified for idlrtn.

Note When an extended service call idle handler is coded as follows, the symbol name specified for idlrtn should be func_idl.

#include <kernel.h> void func_idl ( void ) { ............ ............ return; }