__data uint8_t ao_cur_task_index;
__xdata struct ao_task *__data ao_cur_task;
+#ifdef ao_arch_task_globals
+ao_arch_task_globals
+#endif
+
void
ao_add_task(__xdata struct ao_task * task, void (*start)(void), __code char *name) __reentrant
{
void
ao_yield(void) ao_arch_naked_define
{
- ao_arch_save_context();
+ ao_arch_save_regs();
if (ao_cur_task_index == AO_NO_TASK_INDEX)
ao_cur_task_index = ao_num_tasks-1;
else
{
- uint8_t stack_len;
- __data uint8_t *stack_ptr;
- __xdata uint8_t *save_ptr;
- /* Save the current stack */
- stack_len = SP - (AO_STACK_START - 1);
- ao_cur_task->stack_count = stack_len;
- stack_ptr = (uint8_t __data *) AO_STACK_START;
- save_ptr = (uint8_t __xdata *) ao_cur_task->stack;
- do
- *save_ptr++ = *stack_ptr++;
- while (--stack_len);
+ ao_arch_save_stack();
}
- /* Empty the stack; might as well let interrupts have the whole thing */
- SP = AO_STACK_START - 1;
+ ao_arch_isr_stack();
/* Find a task to run. If there isn't any runnable task,
* this loop will run forever, which is just fine
}
/* Enter lower power mode when there isn't anything to do */
- if (ao_next_task_index == ao_cur_task_index)
- PCON = PCON_IDLE;
+ if (ao_next_task_index == ao_cur_task_index) {
+ ao_arch_cpu_idle();
+ }
}
}
-
- {
- uint8_t stack_len;
- __data uint8_t *stack_ptr;
- __xdata uint8_t *save_ptr;
-
- /* Restore the old stack */
- stack_len = ao_cur_task->stack_count;
- SP = AO_STACK_START - 1 + stack_len;
-
- stack_ptr = (uint8_t __data *) AO_STACK_START;
- save_ptr = (uint8_t __xdata *) ao_cur_task->stack;
- do
- *stack_ptr++ = *save_ptr++;
- while (--stack_len);
- }
-
- _asm
- pop _bp
- pop PSW
- pop ar1
- pop ar0
- pop ar7
- pop ar6
- pop ar5
- pop ar4
- pop ar3
- pop ar2
- pop b
- pop DPH
- pop DPL
- /* The next byte of the stack is the IE register. Only the global
- enable bit forms part of the task context. Pop off the IE then set
- the global enable bit to match that of the stored IE register. */
- pop ACC
- JB ACC.7,0098$
- CLR _EA
- LJMP 0099$
- 0098$:
- SETB _EA
- 0099$:
- /* Finally pop off the ACC, which was the first register saved. */
- pop ACC
- ret
- _endasm;
+ ao_arch_restore_stack();
}
uint8_t
ao_sleep(__xdata void *wchan)
{
- __critical {
+ ao_arch_critical(
ao_cur_task->wchan = wchan;
- }
+ );
ao_yield();
- ao_cur_task->alarm = 0;
if (ao_cur_task->wchan) {
ao_cur_task->wchan = NULL;
return 1;
}
void
-ao_exit(void) __critical
+ao_clear_alarm(void)
{
- uint8_t i;
- ao_num_tasks--;
- for (i = ao_cur_task_index; i < ao_num_tasks; i++)
- ao_tasks[i] = ao_tasks[i+1];
- ao_cur_task_index = AO_NO_TASK_INDEX;
- ao_yield();
+ ao_cur_task->alarm = 0;
+}
+
+void
+ao_exit(void)
+{
+ ao_arch_critical(
+ uint8_t i;
+ ao_num_tasks--;
+ for (i = ao_cur_task_index; i < ao_num_tasks; i++)
+ ao_tasks[i] = ao_tasks[i+1];
+ ao_cur_task_index = AO_NO_TASK_INDEX;
+ ao_yield();
+ );
/* we'll never get back here */
}
ao_task_info(void)
{
uint8_t i;
- uint8_t pc_loc;
__xdata struct ao_task *task;
for (i = 0; i < ao_num_tasks; i++) {
task = ao_tasks[i];
- pc_loc = task->stack_count - 17;
- printf("%12s: wchan %04x pc %04x\n",
+ printf("%12s: wchan %04x\n",
task->name,
- (int16_t) task->wchan,
- (task->stack[pc_loc]) | (task->stack[pc_loc+1] << 8));
+ (int16_t) task->wchan);
}
}