summaryrefslogtreecommitdiffstats
path: root/src/include/linux/sched.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/include/linux/sched.h')
-rw-r--r--src/include/linux/sched.h256
1 files changed, 256 insertions, 0 deletions
diff --git a/src/include/linux/sched.h b/src/include/linux/sched.h
new file mode 100644
index 0000000..e1b35be
--- /dev/null
+++ b/src/include/linux/sched.h
@@ -0,0 +1,256 @@
1#ifndef _SCHED_H
2#define _SCHED_H
3
4#define NR_TASKS 64
5#define HZ 100
6
7#define FIRST_TASK task[0]
8#define LAST_TASK task[NR_TASKS-1]
9
10#include <linux/head.h>
11#include <linux/fs.h>
12#include <linux/mm.h>
13#include <signal.h>
14
15#if (NR_OPEN > 32)
16#error "Currently the close-on-exec-flags are in one word, max 32 files/proc"
17#endif
18
19#define TASK_RUNNING 0
20#define TASK_INTERRUPTIBLE 1
21#define TASK_UNINTERRUPTIBLE 2
22#define TASK_ZOMBIE 3
23#define TASK_STOPPED 4
24
25#ifndef NULL
26#define NULL ((void *) 0)
27#endif
28
29extern int copy_page_tables(unsigned long from, unsigned long to, long size);
30extern int free_page_tables(unsigned long from, unsigned long size);
31
32extern void sched_init(void);
33extern void schedule(void);
34extern void trap_init(void);
35#ifndef PANIC
36void panic(const char * str);
37#endif
38extern int tty_write(unsigned minor,char * buf,int count);
39
40typedef int (*fn_ptr)();
41
42struct i387_struct {
43 long cwd;
44 long swd;
45 long twd;
46 long fip;
47 long fcs;
48 long foo;
49 long fos;
50 long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
51};
52
53struct tss_struct {
54 long back_link; /* 16 high bits zero */
55 long esp0;
56 long ss0; /* 16 high bits zero */
57 long esp1;
58 long ss1; /* 16 high bits zero */
59 long esp2;
60 long ss2; /* 16 high bits zero */
61 long cr3;
62 long eip;
63 long eflags;
64 long eax,ecx,edx,ebx;
65 long esp;
66 long ebp;
67 long esi;
68 long edi;
69 long es; /* 16 high bits zero */
70 long cs; /* 16 high bits zero */
71 long ss; /* 16 high bits zero */
72 long ds; /* 16 high bits zero */
73 long fs; /* 16 high bits zero */
74 long gs; /* 16 high bits zero */
75 long ldt; /* 16 high bits zero */
76 long trace_bitmap; /* bits: trace 0, bitmap 16-31 */
77 struct i387_struct i387;
78};
79
80struct task_struct {
81/* these are hardcoded - don't touch */
82 long state; /* -1 unrunnable, 0 runnable, >0 stopped */
83 long counter;
84 long priority;
85 long signal;
86 struct sigaction sigaction[32];
87 long blocked; /* bitmap of masked signals */
88/* various fields */
89 int exit_code;
90 unsigned long start_code,end_code,end_data,brk,start_stack;
91 long pid,father,pgrp,session,leader;
92 unsigned short uid,euid,suid;
93 unsigned short gid,egid,sgid;
94 long alarm;
95 long utime,stime,cutime,cstime,start_time;
96 unsigned short used_math;
97/* file system info */
98 int tty; /* -1 if no tty, so it must be signed */
99 unsigned short umask;
100 struct m_inode * pwd;
101 struct m_inode * root;
102 struct m_inode * executable;
103 unsigned long close_on_exec;
104 struct file * filp[NR_OPEN];
105/* ldt for this task 0 - zero 1 - cs 2 - ds&ss */
106 struct desc_struct ldt[3];
107/* tss for this task */
108 struct tss_struct tss;
109};
110
111/*
112 * INIT_TASK is used to set up the first task table, touch at
113 * your own risk!. Base=0, limit=0x9ffff (=640kB)
114 */
115#define INIT_TASK \
116/* state etc */ { 0,15,15, \
117/* signals */ 0,{{},},0, \
118/* ec,brk... */ 0,0,0,0,0,0, \
119/* pid etc.. */ 0,-1,0,0,0, \
120/* uid etc */ 0,0,0,0,0,0, \
121/* alarm */ 0,0,0,0,0,0, \
122/* math */ 0, \
123/* fs info */ -1,0022,NULL,NULL,NULL,0, \
124/* filp */ {NULL,}, \
125 { \
126 {0,0}, \
127/* ldt */ {0x9f,0xc0fa00}, \
128 {0x9f,0xc0f200}, \
129 }, \
130/*tss*/ {0,PAGE_SIZE+(long)&init_task,0x10,0,0,0,0,(long)&pg_dir,\
131 0,0,0,0,0,0,0,0, \
132 0,0,0x17,0x17,0x17,0x17,0x17,0x17, \
133 _LDT(0),0x80000000, \
134 {} \
135 }, \
136}
137
138extern struct task_struct *task[NR_TASKS];
139extern struct task_struct *last_task_used_math;
140extern struct task_struct *current;
141extern long volatile jiffies;
142extern long startup_time;
143
144#define CURRENT_TIME (startup_time+jiffies/HZ)
145
146extern void add_timer(long jiffies, void (*fn)(void));
147extern void sleep_on(struct task_struct ** p);
148extern void interruptible_sleep_on(struct task_struct ** p);
149extern void wake_up(struct task_struct ** p);
150
151/*
152 * Entry into gdt where to find first TSS. 0-nul, 1-cs, 2-ds, 3-syscall
153 * 4-TSS0, 5-LDT0, 6-TSS1 etc ...
154 */
155#define FIRST_TSS_ENTRY 4
156#define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1)
157#define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3))
158#define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3))
159#define ltr(n) __asm__("ltr %%ax"::"a" (_TSS(n)))
160#define lldt(n) __asm__("lldt %%ax"::"a" (_LDT(n)))
161#define str(n) \
162__asm__("str %%ax\n\t" \
163 "subl %2,%%eax\n\t" \
164 "shrl $4,%%eax" \
165 :"=a" (n) \
166 :"a" (0),"i" (FIRST_TSS_ENTRY<<3))
167/*
168 * switch_to(n) should switch tasks to task nr n, first
169 * checking that n isn't the current task, in which case it does nothing.
170 * This also clears the TS-flag if the task we switched to has used
171 * tha math co-processor latest.
172 */
173#define switch_to(n) {\
174struct {long a,b;} __tmp; \
175__asm__("cmpl %%ecx,current\n\t" \
176 "je 1f\n\t" \
177 "movw %%dx,%1\n\t" \
178 "xchgl %%ecx,current\n\t" \
179 "ljmp *%0\n\t" \
180 "cmpl %%ecx,last_task_used_math\n\t" \
181 "jne 1f\n\t" \
182 "clts\n" \
183 "1:" \
184 ::"m" (*&__tmp.a),"m" (*&__tmp.b), \
185 "d" (_TSS(n)),"c" ((long) task[n])); \
186}
187
188#define PAGE_ALIGN(n) (((n)+0xfff)&0xfffff000)
189
190#define _set_base(addr,base) \
191__asm__ ("push %%edx\n\t" \
192 "movw %%dx,%0\n\t" \
193 "rorl $16,%%edx\n\t" \
194 "movb %%dl,%1\n\t" \
195 "movb %%dh,%2\n\t" \
196 "pop %%edx" \
197 ::"m" (*((addr)+2)), \
198 "m" (*((addr)+4)), \
199 "m" (*((addr)+7)), \
200 "d" (base) \
201 )
202
203#define _set_limit(addr,limit) \
204__asm__ ("push %%edx\n\t" \
205 "movw %%dx,%0\n\t" \
206 "rorl $16,%%edx\n\t" \
207 "movb %1,%%dh\n\t" \
208 "andb $0xf0,%%dh\n\t" \
209 "orb %%dh,%%dl\n\t" \
210 "movb %%dl,%1\n\t" \
211 "pop %%edx" \
212 ::"m" (*(addr)), \
213 "m" (*((addr)+6)), \
214 "d" (limit) \
215 )
216
217#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) )
218#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 )
219
220/**
221#define _get_base(addr) ({\
222unsigned long __base; \
223__asm__("movb %3,%%dh\n\t" \
224 "movb %2,%%dl\n\t" \
225 "shll $16,%%edx\n\t" \
226 "movw %1,%%dx" \
227 :"=d" (__base) \
228 :"m" (*((addr)+2)), \
229 "m" (*((addr)+4)), \
230 "m" (*((addr)+7)) \
231 :"memory"); \
232__base;})
233**/
234
235static inline unsigned long _get_base(char * addr)
236{
237 unsigned long __base;
238 __asm__("movb %3,%%dh\n\t"
239 "movb %2,%%dl\n\t"
240 "shll $16,%%edx\n\t"
241 "movw %1,%%dx"
242 :"=&d" (__base)
243 :"m" (*((addr)+2)),
244 "m" (*((addr)+4)),
245 "m" (*((addr)+7)));
246 return __base;
247}
248
249#define get_base(ldt) _get_base( ((char *)&(ldt)) )
250
251#define get_limit(segment) ({ \
252unsigned long __limit; \
253__asm__("lsll %1,%0\n\tincl %0":"=r" (__limit):"r" (segment)); \
254__limit;})
255
256#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-12 11:49:48 +0800