kern
annotate src/proc.h @ 71:c7bd6ec7b946
changed test_proc to modify memory after the fork in order to try out copy-on-write,
by pushing the result of getpid on the stack.
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Thu, 13 Oct 2011 05:22:35 +0300 |
| parents | 437360696883 |
| children | 3941e82b07f2 |
| rev | line source |
|---|---|
| nuclear@29 | 1 #ifndef PROC_H_ |
| nuclear@29 | 2 #define PROC_H_ |
| nuclear@29 | 3 |
| nuclear@43 | 4 #include <inttypes.h> |
| nuclear@42 | 5 #include "asmops.h" |
| nuclear@68 | 6 #include "rbtree.h" |
| nuclear@42 | 7 |
| nuclear@42 | 8 #define MAX_PROC 128 |
| nuclear@42 | 9 |
| nuclear@42 | 10 struct context { |
| nuclear@54 | 11 /*struct registers regs;*/ /* saved general purpose registers */ |
| nuclear@54 | 12 /*uint32_t instr_ptr;*/ /* saved eip */ |
| nuclear@47 | 13 uint32_t stack_ptr; /* saved esp */ |
| nuclear@54 | 14 /*uint32_t flags;*/ /* saved eflags */ |
| nuclear@47 | 15 uint32_t pgtbl_paddr; /* physical address of the page table */ |
| nuclear@42 | 16 /* TODO add FPU state */ |
| nuclear@42 | 17 }; |
| nuclear@42 | 18 |
| nuclear@51 | 19 enum proc_state { |
| nuclear@53 | 20 STATE_RUNNABLE, |
| nuclear@51 | 21 STATE_BLOCKED, |
| nuclear@51 | 22 STATE_ZOMBIE |
| nuclear@51 | 23 }; |
| nuclear@51 | 24 |
| nuclear@29 | 25 |
| nuclear@29 | 26 struct process { |
| nuclear@51 | 27 int id, parent; |
| nuclear@51 | 28 enum proc_state state; |
| nuclear@51 | 29 |
| nuclear@55 | 30 /* when blocked it's waiting for a wakeup on this address */ |
| nuclear@55 | 31 void *wait_addr; |
| nuclear@55 | 32 |
| nuclear@51 | 33 int ticks_left; |
| nuclear@52 | 34 |
| nuclear@68 | 35 /* process vm map */ |
| nuclear@68 | 36 struct rbtree vmmap; |
| nuclear@68 | 37 |
| nuclear@52 | 38 /* extends of the process heap, increased by sbrk */ |
| nuclear@52 | 39 |
| nuclear@52 | 40 /* first page of the user stack, extends up to KMEM_START */ |
| nuclear@54 | 41 int user_stack_pg; |
| nuclear@54 | 42 /* first page of the kernel stack, (KERN_STACK_SIZE) */ |
| nuclear@54 | 43 int kern_stack_pg; |
| nuclear@52 | 44 |
| nuclear@42 | 45 struct context ctx; |
| nuclear@51 | 46 |
| nuclear@51 | 47 struct process *next, *prev; /* for the scheduler queues */ |
| nuclear@29 | 48 }; |
| nuclear@29 | 49 |
| nuclear@47 | 50 void init_proc(void); |
| nuclear@47 | 51 |
| nuclear@57 | 52 int fork(void); |
| nuclear@57 | 53 |
| nuclear@47 | 54 void context_switch(int pid); |
| nuclear@47 | 55 |
| nuclear@56 | 56 void set_current_pid(int pid); |
| nuclear@51 | 57 int get_current_pid(void); |
| nuclear@51 | 58 struct process *get_current_proc(void); |
| nuclear@51 | 59 struct process *get_process(int pid); |
| nuclear@51 | 60 |
| nuclear@57 | 61 /* defined in proc-asm.S */ |
| nuclear@57 | 62 uint32_t get_instr_ptr(void); |
| nuclear@57 | 63 uint32_t get_caller_instr_ptr(void); |
| nuclear@57 | 64 void get_instr_stack_ptr(uint32_t *iptr, uint32_t *sptr); |
| nuclear@57 | 65 |
| nuclear@29 | 66 #endif /* PROC_H_ */ |