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任务管理自动化

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Yourtion
2016-04-25 10:51:39 +08:00
parent 04c2e4c402
commit ec1f016838
4 changed files with 106 additions and 56 deletions
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50
16_day/bootpack.c
View File

@@ -7,13 +7,6 @@ void make_window8(unsigned char *buf, int xsize, int ysize, char *title);
void putfonts8_asc_sht(struct SHEET *sht, int x, int y, int c, int b, char *s, int l);
void make_textbox8(struct SHEET *sht, int x0, int y0, int sx, int sy, int c);
struct TSS32 {
int backlink, esp0, ss0, esp1, ss1, esp2, ss2, cr3;
int eip, eflags, eax, ecx, edx, ebx, esp, ebp, esi, edi;
int es, cs, ss, ds, fs, gs;
int ldtr, iomap;
};
void task_b_main(struct SHEET *sht_back);
void HariMain(void)
@@ -23,7 +16,7 @@ void HariMain(void)
char s[40];
int fifobuf[128];
struct TIMER *timer, *timer2, *timer3;
int mx, my, i, cursor_x, cursor_c, task_b_esp;
int mx, my, i, cursor_x, cursor_c;
unsigned int memtotal;
struct MOUSE_DEC mdec;
struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
@@ -38,8 +31,7 @@ void HariMain(void)
0, 0, 0, 0, 0, 0, 0, '7', '8', '9', '-', '4', '5', '6', '+', '1',
'2', '3', '0', '.'
};
struct TSS32 tss_a, tss_b;
struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) ADR_GDT;
struct TASK *task_b;
init_gdtidt();
init_pic();
@@ -96,32 +88,18 @@ void HariMain(void)
memtotal / (1024 * 1024), memman_total(memman) / 1024);
putfonts8_asc_sht(sht_back, 0, 32, COL8_FFFFFF, COL8_008484, s, 40);
tss_a.ldtr = 0;
tss_a.iomap = 0x40000000;
tss_b.ldtr = 0;
tss_b.iomap = 0x40000000;
set_segmdesc(gdt + 3, 103, (int) &tss_a, AR_TSS32);
set_segmdesc(gdt + 4, 103, (int) &tss_b, AR_TSS32);
load_tr(3 * 8);
task_b_esp = memman_alloc_4k(memman, 64 * 1024) + 64 * 1024 - 8;
tss_b.eip = (int) &task_b_main;
tss_b.eflags = 0x00000202; /* IF = 1; */
tss_b.eax = 0;
tss_b.ecx = 0;
tss_b.edx = 0;
tss_b.ebx = 0;
tss_b.esp = task_b_esp;
tss_b.ebp = 0;
tss_b.esi = 0;
tss_b.edi = 0;
tss_b.es = 1 * 8;
tss_b.cs = 2 * 8;
tss_b.ss = 1 * 8;
tss_b.ds = 1 * 8;
tss_b.fs = 1 * 8;
tss_b.gs = 1 * 8;
*((int *) (task_b_esp + 4)) = (int) sht_back;
mt_init();
task_init(memman);
task_b = task_alloc();
task_b->tss.esp = memman_alloc_4k(memman, 64 * 1024) + 64 * 1024 - 8;
task_b->tss.eip = (int) &task_b_main;
task_b->tss.es = 1 * 8;
task_b->tss.cs = 2 * 8;
task_b->tss.ss = 1 * 8;
task_b->tss.ds = 1 * 8;
task_b->tss.fs = 1 * 8;
task_b->tss.gs = 1 * 8;
*((int *) (task_b->tss.esp + 4)) = (int) sht_back;
task_run(task_b);
for (;;) {
io_cli();

26
16_day/bootpack.h
View File

@@ -185,6 +185,26 @@ void timer_settime(struct TIMER *timer, unsigned int timeout);
void inthandler20(int *esp);
/* mtask.c */
extern struct TIMER *mt_timer;
void mt_init(void);
void mt_taskswitch(void);
#define MAX_TASKS 1000 /*最大任务数量*/
#define TASK_GDT0 3 /*定义从GDT的几号开始分配给TSS */
struct TSS32 {
int backlink, esp0, ss0, esp1, ss1, esp2, ss2, cr3;
int eip, eflags, eax, ecx, edx, ebx, esp, ebp, esi, edi;
int es, cs, ss, ds, fs, gs;
int ldtr, iomap;
};
struct TASK {
int sel, flags; /* sel用来存放GDT的编号*/
struct TSS32 tss;
};
struct TASKCTL {
int running; /*正在运行的任务数量*/
int now; /*这个变量用来记录当前正在运行的是哪个任务*/
struct TASK *tasks[MAX_TASKS];
struct TASK tasks0[MAX_TASKS];
};
extern struct TIMER *task_timer;
struct TASK *task_init(struct MEMMAN *memman);
struct TASK *task_alloc(void);
void task_run(struct TASK *task);
void task_switch(void);

82
16_day/mtask.c
View File

@@ -2,26 +2,78 @@
#include "bootpack.h"
struct TIMER *mt_timer;
int mt_tr;
struct TASKCTL *taskctl;
struct TIMER *task_timer;
void mt_init(void)
struct TASK *task_init(struct MEMMAN *memman)
{
mt_timer = timer_alloc();
/*这里没有必要使用timer_init */
timer_settime(mt_timer, 2);
mt_tr = 3 * 8;
int i;
struct TASK *task;
struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) ADR_GDT;
taskctl = (struct TASKCTL *) memman_alloc_4k(memman, sizeof (struct TASKCTL));
for (i = 0; i < MAX_TASKS; i++) {
taskctl->tasks0[i].flags = 0;
taskctl->tasks0[i].sel = (TASK_GDT0 + i) * 8;
set_segmdesc(gdt + TASK_GDT0 + i, 103, (int) &taskctl->tasks0[i].tss, AR_TSS32);
}
task = task_alloc();
task->flags = 2; /*活动中标志*/
taskctl->running = 1;
taskctl->now = 0;
taskctl->tasks[0] = task;
load_tr(task->sel);
task_timer = timer_alloc();
timer_settime(task_timer, 2);
return task;
}
struct TASK *task_alloc(void)
{
int i;
struct TASK *task;
for (i = 0; i < MAX_TASKS; i++) {
if (taskctl->tasks0[i].flags == 0) {
task = &taskctl->tasks0[i];
task->flags = 1; /*正在使用的标志*/
task->tss.eflags = 0x00000202; /* IF = 1; */
task->tss.eax = 0; /*这里先置为0*/
task->tss.ecx = 0;
task->tss.edx = 0;
task->tss.ebx = 0;
task->tss.ebp = 0;
task->tss.esi = 0;
task->tss.edi = 0;
task->tss.es = 0;
task->tss.ds = 0;
task->tss.fs = 0;
task->tss.gs = 0;
task->tss.ldtr = 0;
task->tss.iomap = 0x40000000;
return task;
}
}
return 0; /*全部正在使用*/
}
void task_run(struct TASK *task)
{
task->flags = 2; /*活动中标志*/
taskctl->tasks[taskctl->running] = task;
taskctl->running++;
return;
}
void mt_taskswitch(void)
void task_switch(void)
{
if (mt_tr == 3 * 8) {
mt_tr = 4 * 8;
} else {
mt_tr = 3 * 8;
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);
}
timer_settime(mt_timer, 2);
farjmp(0, mt_tr);
return;
}
}

4
16_day/timer.c
View File

@@ -102,7 +102,7 @@ void inthandler20(int *esp)
}
/* 超时 */
timer->flags = TIMER_FLAGS_ALLOC;
if (timer != mt_timer) {
if (timer != task_timer) {
fifo32_put(timer->fifo, timer->data);
} else {
ts = 1; /* mt_timer超时*/
@@ -112,7 +112,7 @@ void inthandler20(int *esp)
timerctl.t0 = timer;
timerctl.next = timer->timeout;
if (ts != 0) {
mt_taskswitch();
task_switch();
}
return;
}