17.5.8 Variable-sized memory pool information
The number of items that can be defined as variable-sized memory pool information is limited to one for each ID number.
The following shows the variable-sized memory pool information format.
CRE_MPL (mplid, { mplatr, mplsz[:sec_nam], mpl });
|
The items constituting the variable-sized memory pool information are as follows.
Specifies the ID number for a variable-sized memory pool.
A value from 0x1 to 0xff, or a name, can be specified for
mplid.
Note When a name is specified, the CF850V4 automatically assigns an ID number.
The CF850V4 outputs the relationship between a name and an ID number to the system information header file in the following format:
#define mplid value
Specifies the task queuing method for a variable-sized memory pool.
The keyword that can be specified for
mplatr is TA_TFIFO or TA_TPRI.
TA_TFIFO: Task wait queue is in FIFO order.
TA_TPRI: Task wait queue is in task priority order.
3 ) Pool size:
mplsz, memory area name:
sec_nam
Specifies the variable-size memory pool size (unit: bytes) and the name of the memory area secured for the variable-size memory pool.
Only 4-byte boundary values from 0x1 to 0x7ffffffc can be specified for
mplsz, and only memory area name
sec_area defined in
Memory area information" can be specified for
sec_nam.
Note If specification of
sec_nam is omitted, the variable-sized memory pool is allocated to ".kernel_work" section.
4 ) Reserved for future use:
mpl
System-reserved area.
Values that can be specified for
mpl are limited to NULL characters.