pSOSystem System Calls - Read

pSOS+ System Calls t_create
ARM
Supervisor Stack Size
Supervisor stack size is processor-dependent.
PPC
ARM
960
x86
On ARM processors, a task can execute in either user mode or supervisor
mode. A user stack is not needed if the task never executes in the user
mode, in which case ustack is set to 0. If the task starts in the user
mode, then ustack must be greater than 80 bytes to accommodate the
requirements of the interrupt handler. The supervisor/user mode is set in
the t_start() system call.
On PowerPC and ARM processors, the stack size should be no less than
512 bytes.
On 960 processors, the stack size should be no less than 256 bytes.
On x86 processors, the stack size should be no less than 128 bytes.
Using the T_FPU Flag
If the T_FPU flag is set, the size of the task's stack segment is extended to save and
restore FPU registers. It should be set if the task uses the FPU. The extension added
varies according to the processor being used.
68K
CF
PPC
On 68K processors, the stack is extended by 328 bytes.
On ColdFire processors, there is no support for FPU. Hence this feature
is not supported in pSOS+.
On PowerPC processors, the stack is extended by 264 bytes.
pSOSystem System Calls 1-135
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