annotate src/proc.h @ 90:7ff2b4971216
started work on the filesystem
| author |
John Tsiombikas <nuclear@member.fsf.org> |
| date |
Fri, 09 Dec 2011 13:44:15 +0200 |
| parents |
3941e82b07f2 |
| children |
07fe6a614185 |
| rev |
line source |
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1 #ifndef PROC_H_
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2 #define PROC_H_
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3
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4 #include <inttypes.h>
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5 #include "asmops.h"
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6 #include "rbtree.h"
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7 #include "file.h"
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8
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9 #define MAX_PROC 128
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10 #define MAX_FD 64
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11
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12 struct context {
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13 /*struct registers regs;*/ /* saved general purpose registers */
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14 /*uint32_t instr_ptr;*/ /* saved eip */
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15 uint32_t stack_ptr; /* saved esp */
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16 /*uint32_t flags;*/ /* saved eflags */
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17 uint32_t pgtbl_paddr; /* physical address of the page table */
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18 /* TODO add FPU state */
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19 };
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20
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21 enum proc_state {
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22 STATE_RUNNABLE,
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23 STATE_BLOCKED,
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24 STATE_ZOMBIE
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25 };
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26
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27
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28 struct process {
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29 int id, parent;
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30 enum proc_state state;
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31
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32 int exit_status;
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33
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34 /* when blocked it's waiting for a wakeup on this address */
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35 void *wait_addr;
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36
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37 int ticks_left;
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38
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39 /* process vm map */
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40 struct rbtree vmmap;
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41
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42 /* extends of the process heap, increased by sbrk */
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43
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44 /* first page of the user stack, extends up to KMEM_START */
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45 int user_stack_pg;
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46 /* first page of the kernel stack, (KERN_STACK_SIZE) */
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47 int kern_stack_pg;
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48
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49 struct context ctx;
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50
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51 /* open files */
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52 struct file files[MAX_FD];
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53
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54 struct process *child_list;
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55
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56 struct process *next, *prev; /* for the scheduler queues */
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57 struct process *sib_next; /* for the sibling list */
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58 };
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59
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60 void init_proc(void);
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61
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62 int sys_fork(void);
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63 int sys_exit(int status);
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64 int sys_waitpid(int pid, int *status, int opt);
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65
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66 void context_switch(int pid);
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67
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68 void set_current_pid(int pid);
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69 int get_current_pid(void);
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70 struct process *get_current_proc(void);
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71 struct process *get_process(int pid);
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72
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73 int sys_getpid(void);
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74 int sys_getppid(void);
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75
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76 /* defined in proc-asm.S */
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77 uint32_t get_instr_ptr(void);
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78 uint32_t get_caller_instr_ptr(void);
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79 void get_instr_stack_ptr(uint32_t *iptr, uint32_t *sptr);
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80
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81 #endif /* PROC_H_ */
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