mirror of
https://github.com/drasko/codezero.git
synced 2026-01-14 20:03:16 +01:00
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
|
|
* Scheduler and runqueue API definitions.
|
|
*
|
|
* Copyright (C) 2007 Bahadir Balban
|
|
*/
|
|
#ifndef __SCHEDULER_H__
|
|
#define __SCHEDULER_H__
|
|
|
|
#include <l4/generic/tcb.h>
|
|
#include <l4/generic/smp.h>
|
|
#include INC_SUBARCH(cpu.h)
|
|
#include INC_SUBARCH(mm.h)
|
|
#include INC_GLUE(memory.h)
|
|
#include INC_GLUE(smp.h)
|
|
|
|
/* Task priorities */
|
|
#define TASK_PRIO_MAX 10
|
|
#define TASK_PRIO_REALTIME 10
|
|
#define TASK_PRIO_PAGER 8
|
|
#define TASK_PRIO_SERVER 6
|
|
#define TASK_PRIO_NORMAL 4
|
|
#define TASK_PRIO_LOW 2
|
|
#define TASK_PRIO_TOTAL 30
|
|
|
|
/*
|
|
* CONFIG_SCHED_TICKS gives ticks per second.
|
|
* try ticks = 1000, and timeslice = 1 for regressed preemption test.
|
|
*/
|
|
|
|
/*
|
|
* A task can run continuously at this granularity,
|
|
* even if it has a greater total time slice.
|
|
*/
|
|
#define SCHED_GRANULARITY CONFIG_SCHED_TICKS/10
|
|
|
|
static inline struct ktcb *current_task(void)
|
|
{
|
|
register u32 stack asm("sp");
|
|
return (struct ktcb *)(stack & (~PAGE_MASK));
|
|
}
|
|
|
|
#define current current_task()
|
|
#define need_resched (current->ts_need_resched)
|
|
|
|
#define SCHED_RQ_TOTAL 2
|
|
|
|
/* A basic runqueue */
|
|
struct runqueue {
|
|
struct scheduler *sched;
|
|
struct spinlock lock; /* Lock */
|
|
struct link task_list; /* List of tasks in rq */
|
|
unsigned int total; /* Total tasks */
|
|
};
|
|
|
|
/* Contains per-container scheduling structures */
|
|
struct scheduler {
|
|
struct runqueue sched_rq[SCHED_RQ_TOTAL];
|
|
struct runqueue *rq_runnable;
|
|
struct runqueue *rq_expired;
|
|
struct ktcb *idle_task;
|
|
|
|
/* Total priority of all tasks in container */
|
|
int prio_total;
|
|
};
|
|
|
|
DECLARE_PERCPU(extern struct scheduler, scheduler);
|
|
|
|
void sched_init_runqueue(struct scheduler *sched, struct runqueue *rq);
|
|
void sched_init_task(struct ktcb *task, int priority);
|
|
void sched_prepare_sleep(void);
|
|
void sched_suspend_sync(void);
|
|
void sched_suspend_async(void);
|
|
void sched_resume_sync(struct ktcb *task);
|
|
void sched_resume_async(struct ktcb *task);
|
|
void sched_enqueue_task(struct ktcb *first_time_runner, int sync);
|
|
void scheduler_start(void);
|
|
void schedule(void);
|
|
void sched_init(void);
|
|
void idle_task(void);
|
|
|
|
#endif /* __SCHEDULER_H__ */
|