void _benmain(void)
{
struct FIFO32 fifo;
int keybuf[128]={0};
fifo32_init(&fifo, 128, keybuf);
struct TSS32 tss_a = {0};
cons_init();
env_init();
/* keyboard setting */
init_kb(&fifo, 256);
tss_a.ldtr = 0;
tss_a.iomap = 0x40000000;
set_segmdesc(gdt + 0, 103, (int) &tss_a, AR_TSS32);
task_init(memman);
/* Unfortunate try the switch back to 0*8 (_benmain) with farjmp but not working.
* And the reason still unknown.
* So that I use another thread_kb_io() to catch the keyboard interrupt.
*/
load_tr(0 * 8); // record current working task to tss_a
task_create((int) &thread_kb_io, memman, "bshell", 1);
task_create((int) &thread_events, memman, "events", 0);
/* strange issue encountered if run pci_init at the setup_hw() */
puts("pci scan bus\n");
pci_init();
farjmp(0, 4*8);
puts("\nSystem Halted \n");
_syshalt();
}
void task_sleep(struct TASK *task)
{
int i;
char ts = 0;
if (task->flags == 2) {
if (task == taskctl->tasks[taskctl->now]) {
ts = 1;
}
for (i = 0; i < taskctl->running; i++) {
if (taskctl->tasks[i] == task) {
break;
}
}
taskctl->running--;
if (i < taskctl->now) {
taskctl->now--;
}
for (; i < taskctl->running; i++) {
taskctl->tasks[i] = taskctl->tasks[i + 1];
}
task->flags = 1;
if (ts != 0) {
if (taskctl->now >= taskctl->running) {
taskctl->now = 0;
}
farjmp(0, taskctl->tasks[taskctl->now]->sel);
}
}
return;
}
void task_sleep(struct TASK *task)
{
int i;
char ts = 0;
if (task->flags == 2) { /* 指定タスクがもし起きていたら */
if (task == taskctl->tasks[taskctl->now]) {
ts = 1; /* 自分自身を寝かせるので、あとでタスクスイッチする */
}
/* taskがどこにいるかを探す */
for (i = 0; i < taskctl->running; i++) {
if (taskctl->tasks[i] == task) {
/* ここにいた */
break;
}
}
taskctl->running--;
if (i < taskctl->now) {
taskctl->now--; /* ずれるので、これもあわせておく */
}
/* ずらし */
for (; i < taskctl->running; i++) {
taskctl->tasks[i] = taskctl->tasks[i + 1];
}
task->flags = 1; /* 動作していない状態 */
if (ts != 0) {
/* タスクスイッチする */
if (taskctl->now >= taskctl->running) {
/* nowがおかしな値になっていたら、修正する */
taskctl->now = 0;
}
farjmp(0, taskctl->tasks[taskctl->now]->sel);
}
}
return;
}
void task_b_main (struct SHEET *sht_back)
{
struct FIFO32 fifo;
struct TIMER *timer_ts, *timer_put;
int i, fifobuf[128], count = 0;
fifo32_init(&fifo, 128, fifobuf);
timer_ts = timer_alloc();
timer_init(timer_ts, &fifo, 2);
timer_settime(timer_ts, 2);
timer_put = timer_alloc();
timer_init(timer_put, &fifo, 1);
timer_settime(timer_put, 1);
for (;;) {
count++;
io_cli();
if (fifo32_status(&fifo) == 0) {
io_stihlt();
} else {
i = fifo32_get(&fifo);
io_sti();
if (i == 1) {
char s[11];
sprintf (s, "%d", count);
putfonts8_asc_sht (sht_back, 0, 144, COL8_FFFFFF, COL8_008484, s, 11);
timer_settime (timer_put, 1);
} else if (i == 2) { // timeout 5 sec
farjmp(0, 3 * 8);
timer_settime(timer_ts, 2);
}
}
}
}
/* will be directly called by inthandler20 */
void task_switch(void) {
struct TASKLEVEL *tl = &taskctl->level[taskctl->now_lv];
struct TASK *new_task, *now_task = tl->tasks[tl->now];
/*
why can't we use this??
tl->now = (tl->now + 1) % (tl->running);
*/
tl->now++;
if (tl->now == tl->running) {
tl->now = 0;
}
/* need to make sure we are runnig the curret task, update correct running level */
if(taskctl->lv_change != 0) {
task_switchsub();
tl = &taskctl->level[taskctl->now_lv];
}
new_task = tl->tasks[tl->now];
/* align time slice to new task now */
timer_settime(task_timer, new_task->priority);
/* if it's not the same task jump to the new task */
if(new_task != now_task) {
farjmp(0, new_task->sel);
}
return;
}
void task_b_main(void)
{
struct FIFO32 fifo;
struct TIMER *timer_ts;
int i, fifobuf[128];
fifo32_init(&fifo, 128, fifobuf);
timer_ts = timer_alloc();
timer_init(timer_ts, &fifo, 1);
timer_settime(timer_ts, 2);
for (;;) {
io_cli();
if (fifo32_status(&fifo) == 0) {
io_sti();
io_hlt();
} else {
i = fifo32_get(&fifo);
io_sti();
if (i == 1) { /* タスクスイッチ */
farjmp(0, 3 * 8);
timer_settime(timer_ts, 2);
}
}
}
}
void _benmain(void)
{
int i;
int c = 0;
int keybuf[128]={0};
struct FIFO32 fifo;
struct TIMER *timer;
fifo32_init(&fifo, 128, keybuf);
struct TSS32 tss_a, tss_c;
env_init();
/* keyboard setting */
init_kb(&fifo, 256);
i=0;
timer = timer_alloc();
timer_init(timer, &fifo, 1);
timer_settime(timer, 50);
tss_a.ldtr = 0;
tss_a.iomap = 0x40000000;
tss_c.ldtr = 0;
tss_c.iomap = 0x40000000;
set_segmdesc(gdt + 3, 103, (int) &tss_a, AR_TSS32);
task_init(memman);
/* Unfortunate try the switch back to 3*8 (_benmain) with farjmp but not working.
* And the reason still unknown.
* So that I use another thread_kb_io() to catch the keyboard interrupt.
*/
load_tr(3 * 8); // record current working task to tss_a
task_create((int) &thread_kb_io, memman, "bshell");
/* strange issue encountered if run pci_init at the setup_hw() */
puts("pci scan bus\n");
pci_init();
for (;;) {
asm_cli();
if (fifo32_status(&fifo) == 0) {
asm_stihlt(); // wake while keyboard input
// got a interrupt
} else { /* scan_code input */
c=fifo32_get(&fifo);
asm_sti();
if (c == 1) {
farjmp(0, 4*8);
} else {
puts("disabled boot options.\n");
}
}
}
puts("\nSystem Halted \n");
_syshalt();
}
/* 任务切换函数 */
void mt_taskswitch(void)
{
if (mt_tr == 3 * 8) {
mt_tr = 4 * 8;
} else {
mt_tr = 3 * 8;
}
timer_settime(mt_timer, 2);
farjmp(0, mt_tr); /* 远跳转 */
return;
}
void task_switch(void)
{
timer_settime(task_timer, 2);
if (taskctl->running >= 2) {
taskctl->now++;
if (taskctl->now == taskctl->running) {
taskctl->now = 0;
}
farjmp(0, taskctl->tasks[taskctl->now]->sel);
}
return;
}
//任务切换
void task_switch(void)
{
timer_set(task_timer, 2);
if(taskctl->running_number >= 2) //只要当前运行中的任务有两个以上，就进行任务切换，否则直接结束
{
taskctl->task_now++;
if(taskctl->task_now == taskctl->running_number)
{
taskctl->task_now = 0;
}
farjmp(0, taskctl->running_tasks[taskctl->task_now]->selector);
}
return ;
}
void task_switch(void)
{
struct TASK *task;
taskctl->now++;
if (taskctl->now == taskctl->running) {
taskctl->now = 0;
}
task = taskctl->tasks[taskctl->now];
timer_settime(task_timer, task->priority);
if (taskctl->running >= 2) {
farjmp(0, task->sel);
}
return;
}
void task_sleep(task_t* task)
{
task_t* now_task;
if (task->flags == 2) {
/* 活动中 */
now_task = task_now();
task_remove(task); /* flags变1 */
if (task == now_task) {
/* 如果是让自己休眠，则需要切换任务 */
task_switchsub();
now_task = task_now(); /* 设置后获取当前任务值 */
farjmp(0, now_task->sel);
}
}
}
void task_sleep(struct TASK *task)
{
struct TASK *now_task;
if (task->flags == 2) { // if specified task is waken
now_task = task_now();
task_remove (task);
if (task == now_task) {
task_switchsub ();
now_task = task_now ();
farjmp (0, now_task->sel);
}
}
return;
}
void task_sleep(TASK* task) {
if (task->flags != RUNNING)
return;
// TODO: Need to prevent interrupt?
TASK* now_task = task_now();
task_remove(task); // This makes the task ALLOCATED (sleep).
if (task == now_task) {
// Sleep by self => need task switch.
task_switchsub();
now_task = task_now();
farjmp(0, now_task->sel);
}
}
void task_sleep(struct TASK *task)
{
struct TASK *now_task;
if (task->flags == 2) {
/* 動作中だったら */
now_task = task_now();
task_remove(task); /* これを実行するとflagsは1になる */
if (task == now_task) {
/* 自分自身のスリープだったので、タスクスイッチが必要 */
task_switchsub();
now_task = task_now(); /* 設定後での、「現在のタスク」を教えてもらう */
farjmp(0, now_task->sel);
}
}
return;
}
/* 使某任务睡眠 */
void task_sleep(struct TASK *task)
{
struct TASK *now_task;
if (task->flags == 2) {
/* 如果处于活动状态 */
now_task = task_now(); /* 获得当前正在运行的任务的task指针 */
task_remove(task); /* 执行词语句的话flag会等于1 */
if (task == now_task) {
/* 如果是让自己休眠 则需要任务切换 */
task_switchsub();
now_task = task_now(); /* 在设定后获取新的level中待运行的任务 */
farjmp(0, now_task->sel); /* 切换任务 */
}
}
return;
}
/* remove task from its level */
void task_sleep(struct TASK *task) {
struct TASK *current_task;
/* if the task is running then we remove it from running buffer and mark it as not running */
if(task->flags == 2) {
current_task = task_now();
/*task->flags would become 1 */
task_remove(task);
/* if a task is termination it self, need to explicitly jump to the new running task */
if(task == current_task) {
task_switchsub();
current_task = task_now();
farjmp(0, current_task->sel);
}
}
return;
}
//任务休眠
void task_sleep(TASK *task)
{
TASK *now_task;
if (task->flags == RUNNING)
{
now_task = task_now();
task_remove(task); //执行这行代码之后只是把task从level中移除了，并且flags变成SLEEP状态，但是task本身并没有被释放
if (task == now_task)
{
/*如果是自己让自己休眠的情况还需要任务转换*/
level_switch();
now_task = task_now();
farjmp(0, now_task->selector);
}
}
return;
}
void Task::sleep(){
Task *now_task;
//もし対象のタスクが動いていたら
if(this->flags == 2){
now_task = TaskControll::task_now();
TaskControll::task_remove(this); //flags = 1
if(this == now_task){
//自身が現在のタスクでスリープにするとき
TaskControll::task_switchsub();
now_task = TaskControll::task_now();
farjmp(0,now_task->sel);
}
}
return;
}
/**
* @description 休眠任务
* @param task：欲休眠的任务
* @notice 休眠任务自己将会引起任务切换
*/
void task_sleep(struct TASK *task){
struct TASK *now_task;
//TODO 任务有效性检查
if (task->flags == 2) {
now_task = task_now();
task_remove(task);
if (task == now_task) {
//TODO 当前任务，则立即休眠
task_switchsub();
//TODO 获得跳转的目标任务，以跳转
now_task = task_now();
farjmp(0, now_task->sel);
}
}
return;
}
/**
* @description 任务调度
*/
void task_switch(void){
struct TASKLEVEL *tl = &taskctl->level[taskctl->now_lv];
struct TASK *new_task, *now_task = tl->tasks[tl->now];
tl->now++;
if (tl->now == tl->running) {
tl->now = 0;
}
if (taskctl->lv_change != 0) {
task_switchsub();
tl = &taskctl->level[taskctl->now_lv];
}
new_task = tl->tasks[tl->now];
timer_settime(task_timer, new_task->priority);
if (new_task != now_task) {
farjmp(0, new_task->sel);
}
return;
}
////将该任务从可裕兴队列中移除，同时设置为参数指定的状态
//参数：task -- 需要操作的任务, task_status -- task被设成这个任务状态
static void _task_change_status(struct TASK *task, enum TASK_STATUS task_status)
{
struct TASK *now_task;
if (task->flags == TASK_STATUS_RUNNING) {
/* 如果处于活动状态 */
now_task = task_now();
task_remove(task, task_status);
if (task == now_task) {
/* 如果是让自己休眠，则需要进行任务切换 */
task_switchsub();
now_task = task_now(); /* 在设定后获取当前任务的值 */
//debug("process[%d,%s] go to sleep, process[%d,%s] is running",task->pid,task->name,now_task->pid,now_task->name);
farjmp(0, now_task->sel);
}
}
return;
}
void task_sleep(struct _task *task) {
struct _task *now_task;
if (task->flags == TASK_RUNNING) {
/* If current task is running */
now_task = task_now();
/* Set 'task' back to READY state */
task_remove(task);
/* Sleep yourself */
if (task == now_task) {
/* Recalebrate Level */
task_switchsub();
/* Switch Current Task */
now_task = task_now();
/* JMP */
farjmp(0, now_task->sel);
}
}
return;
}
void scheduler()
{
while(true) {
cli();
while(ready.size == 0) {
__asm__ volatile(
"sti;"
"hlt;"
);
}
CURRENT_TASK = ready.head;
CURRENT_TASK->status = RUNNING;
ready.head = CURRENT_TASK->next;
if(--ready.size == 0)
ready.tail = NULL;
farjmp(0, CURRENT_TASK->pid << 3);
sti();
}
}
void task_switch(void) {
if (taskctl->now_lv >= MAX_TASKLEVELS) {
io_stihlt();
return;
}
TASKLEVEL* tl = &taskctl->level[taskctl->now_lv];
TASK* now_task = tl->tasks[tl->now++];
if (tl->now >= tl->running)
tl->now = 0;
if (taskctl->lv_change) {
task_switchsub();
tl = &taskctl->level[taskctl->now_lv];
}
TASK* new_task = tl->tasks[tl->now];
timer_settime(task_timer, new_task->priority);
if (new_task != now_task)
farjmp(0, new_task->sel);
}
/* 该函数只在void inthandler20(int *esp)时钟中断处理中被调用 */
void task_switch(void)
{
struct TASKLEVEL *tl = &taskctl->level[taskctl->now_lv];
struct TASK *new_task, *now_task = tl->tasks[tl->now];
tl->now++;
if (tl->now == tl->running) {
/* 当now出现异常时调整它 */
tl->now = 0;
}
if (taskctl->lv_change != 0) { /* 是否需要检测level */
task_switchsub(); /* 寻找最上层的level */
tl = &taskctl->level[taskctl->now_lv]; /* 修改tl让它指向最上层的level */
}
new_task = tl->tasks[tl->now];
timer_settime(task_timer, new_task->priority);
if (new_task != now_task) {
farjmp(0, new_task->sel);
}
return;
}
void cmd_hlt(struct CONSOLE *cons, int *fat)
{
struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
struct FILEINFO *finfo = file_search("HLT.HRB", (struct FILEINFO *) (ADR_DISKIMG + 0x002600), 224);
struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) ADR_GDT;
char *p;
if (finfo != 0) {
/* ファイルが見つかった場合 */
p = (char *) memman_alloc_4k(memman, finfo->size);
file_loadfile(finfo->clustno, finfo->size, p, fat, (char *) (ADR_DISKIMG + 0x003e00));
set_segmdesc(gdt + 1003, finfo->size - 1, (int) p, AR_CODE32_ER);
farjmp(0, 1003 * 8);
memman_free_4k(memman, (int) p, finfo->size);
} else {
/* ファイルが見つからなかった場合 */
putfonts8_asc_sht(cons->sht, 8, cons->cur_y, COL8_FFFFFF, COL8_000000, "File not found.", 15);
cons_newline(cons);
}
cons_newline(cons);
return;
}
void TaskControll::task_switch(void){
TaskLevel *tl = &TaskControll::level[TaskControll::now_lv];
Task *now_task = tl->tasks[tl->now];
Task *new_task;
tl->now++;
if(tl->now == tl->running){
tl->now = 0;
}
//タスクレベルの切り替え
if(TaskControll::lv_change != 0){
task_switchsub();
tl = &TaskControll::level[TaskControll::now_lv];
}
new_task = tl->tasks[tl->now];
TaskControll::timer->settime(new_task->priority);
//実際のタスクの切り替え
if(new_task != now_task){
farjmp(0,new_task->sel);
}
return;
}
void task_switch(void) {
struct _tasklevel *tl = &taskctl->level[taskctl->now_lv];
struct _task *new_task, *now_task = tl->tasks[tl->now];
/* Switch to current level:next task */
tl->now++;
/* Reset to beginning when proceed to the end */
if (tl->now == tl->running) {
tl->now = 0;
}
/* If it requires level switching */
if (taskctl->lv_change != 0) {
task_switchsub();
tl = &taskctl->level[taskctl->now_lv];
}
new_task = tl->tasks[tl->now];
/* Timeslice allocation depends on its priority */
timer_settime(task_timer, new_task->priority);
/* Only do JMP when there is different task */
if (new_task != now_task) {
farjmp(0, new_task->sel);
}
return;
}
//任务切换，主要是给timer的中断处理程序调用的
void task_switch(void)
{
TASKLEVEL *tl = &taskctl->task_level[taskctl->lv_now];
TASK *new_task, *now_task = tl->tasks_lv[tl->task_now];
tl->task_now++;
//先把任务所在的当前level中的任务调整好
if (tl->task_now == tl->running_number) //如果running_number到最后一个了，就重新回到第一个
{
tl->task_now = 0;
}
if (taskctl->lv_change != 0) //如果需要改变level的情况
{
level_switch(); //找出当前的最高级level
tl = &taskctl->task_level[taskctl->lv_now];
}
//找出要转换到的那个任务，并且设置好timer，然后执行任务跳转
new_task = tl->tasks_lv[tl->task_now];
timer_set(task_timer, new_task->priority);
if (new_task != now_task) //如果转换任务之后发现还是当前任务，就不用跳转了
{
farjmp(0, new_task->selector);
}
return;
}