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tm.h File Reference

Internal Interface: task management. More...

#include <config.h>
#include "../tm.h"

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Defines

#define SP_RETURN_OFFSET   10
 return address offset on stack in words.
#define IDLE_STACK_SIZE   128
 should suffice for IRQ service

Functions

void tm_init (void)
 init task management
void tm_start (void)
 start task management
void tm_switcher (void)
 the task switcher IRQ handler
size_t * tm_scheduler (size_t *old_sp)
 the process scheduler
int tm_idle_task (int, char **)
 the idle task

Variables

tdata_t td_single
 single process process data
tdata_t * ctid
 ptr to current process data
volatile unsigned int nb_tasks
 number of tasks
volatile unsigned int nb_system_tasks
volatile unsigned char tm_timeslice
 task time slice

Detailed Description

Internal Interface: task management.

Author:
Markus L. Noga <markus@noga.de>

Definition in file tm.h.

Define Documentation

#define IDLE_STACK_SIZE   128

should suffice for IRQ service

Definition at line 48 of file tm.h.

#define SP_RETURN_OFFSET   10

return address offset on stack in words.

Definition at line 46 of file tm.h.

Function Documentation

int tm_idle_task ( int  ,
char **   
)

the idle task

infinite sleep instruction to conserve power

void tm_init ( void   ) 

init task management

Referenced by kmain().

size_t* tm_scheduler ( size_t *  old_sp  ) 

the process scheduler

Parameters:
old_sp current task's current stack pointer
Returns:
new task's current stack pointer
actual context switches performed by tm_switcher (assembler wrapper)

void tm_start ( void   ) 

start task management

called in single tasking mode after task setup

Referenced by kmain().

void tm_switcher ( void   ) 

the task switcher IRQ handler

located in the assembler process module

Variable Documentation

tdata_t* ctid

ptr to current process data

volatile unsigned int nb_system_tasks

volatile unsigned int nb_tasks

number of tasks

tdata_t td_single

single process process data

volatile unsigned char tm_timeslice

task time slice

Definition at line 72 of file systime.c.

Referenced by systime_init(), and systime_set_timeslice().

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