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APPENDIX B SIZE OF MEMORY

This appendix explains the size of the memory area.
B.1 Description
The memory areas used and managed by the RI850V4 are divided into eight sections by use.
Table B-1 Memory Area
Section Name
Outline
.kernel_system
Area where executable code of RI850V4 is allocated.
.kernel_const
Area where static data of RI850V4 is allocated.
.kernel_data
Area where dynamic data of RI850V4 is allocated.
.kernel_data_init
Area where kernel initialization flag of RI850V4 is allocated.
.kernel_const_trace.const
Area where static data of trace function is allocated.
.kernel_data_trace.bss
Area where dynamic data of trace function is allocated.
.kernel_work
Area where system stack, task stack, data queue, fixed-sized memory pool and variable-sized memory pool is allocated.
.sec_namuser-defined area
Area where task stack, data queue, fixed-sized memory pool or variable-sized memory pool is allocated.

B.1.1 .kernel_system
The size of ".kernel_system" section depends on the trace mode and the kernel library used.
There are four types of kernel library as follows.
- CC-RH version, not supporting the FPU
- CC-RH version, supporting the FPU
- CCV850 version, not supporting the FPU
- CCV850 version, supporting the FPU
The type of the trace mode is selected in the Property panel -> [Task Analyzer] tab -> [Trace] category -> [Selection of trace mode].
1 ) CC-RH version, not supporting the FPU
Type of the Trace Mode
Size of the Memory Area
Not tracing
20.0K Bytes
Taking in trace chart by hardware trace mode
20.3K Bytes
Taking in trace chart by software trace mode
20.8K Bytes
Taking in long-statistics by software trace mode
20.7K Bytes

2 ) CC-RH version, supporting the FPU
Type of the Trace Mode
Size of the Memory Area
Not tracing
20.3K Bytes
Taking in trace chart by hardware trace mode
20.6K Bytes
Taking in trace chart by software trace mode
21.1K Bytes
Taking in long-statistics by software trace mode
20.9K Bytes

3 ) CCV850 version, not supporting the FPU
Type of the Trace Mode
Size of the Memory Area
Not tracing
20.0K Bytes
Taking in trace chart by hardware trace mode
20.3K Bytes
Taking in trace chart by software trace mode
20.8K Bytes
Taking in long-statistics by software trace mode
20.6K Bytes

4 ) CCV850 version, supporting the FPU
Type of the Trace Mode
Size of the Memory Area
Not tracing
20.2K Bytes
Taking in trace chart by hardware trace mode
20.5K Bytes
Taking in trace chart by software trace mode
21.0K Bytes
Taking in long-statistics by software trace mode
20.9K Bytes

Note The above values are maximum, when using all service calls provided by RI850V4. The value fluctuate corresponding to the type of service calls using.
B.1.2 .kernel_const
The size of ".kernel_const" section depends on the number of information items defined (such as Memory area information and Task information) and the details of the definitions.
The following shows an expression required for estimation ".kernel_const" section size.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 KERNEL_CONST =

     224

     + 8 * MEM_AREA_num

     + 24 * CRE_TSK_num

     + 8 * CRE_SEM_num

     + 8 * CRE_FLG_num

     + 8 * CRE_DTQ_num

     + 4 * CRE_MBX_num

     + align42 * CRE_MTX_num

     + 12 * CRE_MPF_num

     + 12 * CRE_MPL_num

     + 20 * CRE_CYC_num

     + 8 * DEF_INH_num

     + 8 * DEF_SVC_num

     + 12 * ATT_INI_num

     + 8 * VATT_IDL_num

     + align4maxint

     + align4TA_ACT_num

     + align4TA_STA_num

Note The keyword in the expression means as follows.
Keywords
Meaning
 
 MEM_AREA_num
The number of the definition of the Memory area information.
 
 CRE_TSK_num
The number of the definition of the Task information.
 
 CRE_SEM_num
The number of the definition of the Semaphore information.
 
 CRE_FLG_num
The number of the definition of the Eventflag information.
 
 CRE_DTQ_num
The number of the definition of the Data queue information.
 
 CRE_MBX_num
The number of the definition of the Mailbox information.
 
 CRE_MTX_num
The number of the definition of the Mutex information.
 
 CRE_MPF_num
The number of the definition of the Fixed-sized memory pool information.
 
 CRE_MPL_num
The number of the definition of the Variable-sized memory pool information.
 
 CRE_CYC_num
The number of the definition of the Cyclic handler information.
 
 DEF_INH_num
The number of the definition of the Interrupt handler information.
 
 DEF_SVC_num
The number of the definition of the Extended service call routine information.
 
 ATT_INI_num
The number of the definition of the Initialization routine information.
 
 VATT_IDL_num
The number of the definition of the Idle routine information.
 
 maxint

 TA_ACT_num
The number of the definition of "TA_ACT" to initial activation state of Attribute: tskatr.
 
 TA_STA_num
The number of the definition of "TA_STA" to initial activation state of Attribute: cycatr

B.1.3 .kernel_data
The size of ".kernel_data" section depends on the number of information items defined (such as Task information and Semaphore information) and the details of the definitions.
The following shows an expression required for estimation ".kernel_data" section size.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 KERNEL_DATA =

     68

     + 32 * CRE_TSK_num

     + 8 * CRE_SEM_num

     + 8 * CRE_FLG_num

     + 8 * CRE_DTQ_num

     + 12 * CRE_MBX_num

     + 8 * CRE_MTX_num

     + 8 * CRE_MPF_num

     + 8 * CRE_MPL_num

     + 8 * CRE_CYC_num

     + align4maxtpri

Note The keyword in the expression means as follows.
Keywords
Meaning
 
 CRE_TSK_num
The number of the definition of the Task information.
 
 CRE_SEM_num
The number of the definition of the Semaphore information.
 
 CRE_FLG_num
The number of the definition of the Eventflag information.
 
 CRE_DTQ_num
The number of the definition of the Data queue information.
 
 CRE_MBX_num
The number of the definition of the Mailbox information.
 
 CRE_MTX_num
The number of the definition of the Mutex information.
 
 CRE_MPF_num
The number of the definition of the Fixed-sized memory pool information.
 
 CRE_MPL_num
The number of the definition of the Variable-sized memory pool information.
 
 CRE_CYC_num
The number of the definition of the Cyclic handler information.
 
 maxtpri
The value of the definition in the Maximum priority: maxtpri.

B.1.4 .kernel_data_init
The size of ".kernel_data_init" section is 4 bytes.
B.1.5 .kernel_const_trace.const
The size of ".kernel_const_trace.const" section depends on the trace mode; that is, the mode selected in the Property panel -> [Task Analyzer] tab -> [Trace] category -> [Selection of trace mode].
In the following table, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
Type of Trace Mode
Size of the Memory Area
Not tracing
align4 (5) Bytes
Taking in trace chart by hardware trace mode
align4 (61) Bytes
Taking in trace chart by software trace mode
align4 (74) Bytes
Taking in long-statistics by software trace mode
align4 (70) Bytes

B.1.6 .kernel_data_trace.bss
The size of ".kernel_data_trace.bss" section depends on the trace mode. The type of trace mode is selected in the "Property panel -> [Task Analyzer] tab -> [Trace] category -> [Selection of trace mode]".
1 ) Not tracing
The size of ".kernel_data_trace.bss" section is 0 bytes.
2 ) Taking in trace chart by hardware trace mode
The size of ".kernel_data_trace.bss" section is 4 bytes.
3 ) Taking in trace chart by software trace mode
The size of ".kernel_data_trace.bss" section depends on the definition in the Property panel -> [Task Analyzer] tab -> [Trace] category -> [Buffer size].
The following shows an expression required for estimating ".kernel_data_trace.bss" section size.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 KERNEL_DATA_TRACE.BSS =

     24

     + align4TRC_BUF_size

Note The keyword in the expression means as follows.
Keywords
Meaning
 
 TRC_BUF_size
The number of the definition of the Property panel -> [Task Analyzer] tab -> [Trace] category -> [Buffer size].

4 ) Taking in long-statistics by software trace mode
The size of ".kernel_data_trace.bss" section depends on the number of task information items defined and the details of the basic information definitions.
The following shows an expression required for estimation ".kernel_data_trace.bss" section size.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 KERNEL_DATA_TRACE.BSS =

     24

     + 8 * CRE_TSK_num

     + align410 * intlvl - maxintpri

     + 8 * maxint

Note The keyword in the expression means as follows.
Keywords
Meaning
CRE_TSK_num
The number of the definition of the Task information.
intlvl
The value of interrupt level provided in the target CPU.
maxintpri
The value of the definition in the Maximum interrupt priority: maxintpri
maxint

B.1.7 .kernel_work
The size of ".kernel_work" section depends on the information such as Basic information and Task information and so on.
The following shows an expression required for estimating ".kernel_work" section size.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 KERNEL_WORK =

     116

     + SYSSTK

     + TSKSTK_total

     + DTQ_total

     + MPF_total

     + MPL_total

Note The keyword in the expression means as follows.
Keywords
Meaning
SYSSTK
The value calculated by "System stack".
TSKSTK_total
Total amount of the stack size that specified in "Task stack" for each task.
DTQ_total
Total amount of the memory size that specified in "Data queue" for each data queue.
MPF_total
Total amount of the memory size that specified in "Fixed-sized memory pool" for each fixed-sized memory pool.
MPL_total
Total amount of the memory size that specified in "Variable-sized memory pool" for each variable-sized memory pool.

1 ) System stack
The size of the system stack depends on the details of the Task information and the process of task.
The following shows an expression required for estimation the system stack size required by the RI850V4.
In the following expression, "max(a, b, c)" means the result of selecting the largest value from "a", "b", and "c" (for example, max(1, 2, 3) is 3).
 SYSSTK =

     maxalign4INT + align4CYC, align4INI, align4IDL

Note The keyword in the expression means as follows.
Keywords
Meaning
INT
The stack size of the interrupt handler using. If the interrupt handler processes are nested, considers the nest counts. If the interrupt handler is undefined, the stack size of the interrupt handler is nothing.
CYC
The stack size of the cyclic handler using. If multiple cyclic handlers are existed, the maximum value among them. If the cyclic handler is undefined, the stack size of the cyclic handler is nothing.
INI
The stack size of the initialization routine using. If multiple initialization routines are existed, the maximum value among them. If the initialization routine is undefined, the stack size of the initialization routine is nothing.
IDL
The stack size of the idle routine using. If the idle routine is undefined, the stack size of the idle routine is nothing.

2 ) Task stack
The size of the task stack depends on the details of Task information definitions and processing to be done in the tasks.
The following shows an expression required for estimating the task stack size required by each task defined in the Task information.
 TSKSTK =

     ctxsz

     + stksz

Note The keyword in the expression means as follows.
Keywords
Meaning
ctxsz
This value is determined as shown in Table B-2 according to the target C compiler type and device type specified in the activation options for the CONFIGURATOR CF850V4 (see "18.2.1 Activating from command line" for details of activation options) and the preempt acceptance state specified in the Attribute: tskatr (such as coding language and initial activation state).
stksz
The value corresponding to task processing (defined the value of the Task stack size: stksz, memory area name: sec_nam).

Table B-2 Value of ctxsz
Section Name
FPU
Enable Preempt
Disable Preempt
CC-RH version
not supporting the FPU
132
88
supporting the FPU
136
92
CCV850 version
not supporting the FPU
128
84
supporting the FPU
132
88

3 ) Data queue
The size of the data queues depends on the details of Data queue information definitions.
The following shows an expression required for estimating the data queue size by each data queue defined in the Data queue information.
 DTQ =

     4 * dtqcnt

Note The keyword in the expression means as follows.
Keywords
Meaning
dtqcnt
The value of the definition in the Data count: dtqcnt, memory area name: sec_nam.

4 ) Fixed-sized memory pool
The size of the fixed-sized memory pools depends on the details of Fixed-sized memory pool information definitions.
The following shows an expression required for estimating the fixed-sized memory pool size required by each fixed-sized memory pool defined in the Fixed-sized memory pool information.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 MPF =

     align4blksz * blkcnt

Note The keyword in the expression means as follows.
Keywords
Meaning
blksz
The value of the definition in the Basic block size: blksz, memory area name: sec_nam.
blkcnt
The value of the definition in the Block count: blkcnt.

5 ) Variable-sized memory pool
The size of the variable-sized memory pools depends on the details of Variable-sized memory pool information definitions.
The following shows an expression required for estimating the variable-sized memory pool size required by each variable-sized memory pool defined in the Variable-sized memory pool information.
In the expression, "align4 (x)" means the result of aligning the value "x" to a 4-byte boundary.
 MPF =

     align4blksz * blkcnt

Note The keyword in the expression means as follows.
Keywords
Meaning
mplsz
The value of the definition in the Pool size: mplsz, memory area name: sec_nam.

B.1.8 .sec_nam(user-definied area)
The size of ".sec_nam (user-defined area)" depends on the details of information definitions (such as Task information and Data queue information).
Note This section is necessary when the task stack or data queue area is defined to be allocated outside ".kernel_work" section in the Task information or Data queue information.
Estimate the memory size for this section with reference to the descriptions in "B.1.7 .kernel_work".
Differences Information
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