kern
annotate src/proc.h @ 55:88a6c4e192f9
Fixed most important task switching bugs.
Now it seems that I can switch in and out of user space reliably.
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Mon, 15 Aug 2011 04:03:39 +0300 |
| parents | 4eaecb14fe31 |
| children | 0be4615594df |
| 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@42 | 6 |
| nuclear@42 | 7 #define MAX_PROC 128 |
| nuclear@42 | 8 |
| nuclear@42 | 9 struct context { |
| nuclear@54 | 10 /*struct registers regs;*/ /* saved general purpose registers */ |
| nuclear@54 | 11 /*uint32_t instr_ptr;*/ /* saved eip */ |
| nuclear@47 | 12 uint32_t stack_ptr; /* saved esp */ |
| nuclear@54 | 13 /*uint32_t flags;*/ /* saved eflags */ |
| nuclear@47 | 14 uint32_t pgtbl_paddr; /* physical address of the page table */ |
| nuclear@42 | 15 /* TODO add FPU state */ |
| nuclear@42 | 16 }; |
| nuclear@42 | 17 |
| nuclear@51 | 18 enum proc_state { |
| nuclear@53 | 19 STATE_RUNNABLE, |
| nuclear@51 | 20 STATE_BLOCKED, |
| nuclear@51 | 21 STATE_ZOMBIE |
| nuclear@51 | 22 }; |
| nuclear@51 | 23 |
| nuclear@29 | 24 |
| nuclear@29 | 25 struct process { |
| nuclear@51 | 26 int id, parent; |
| nuclear@51 | 27 enum proc_state state; |
| nuclear@51 | 28 |
| nuclear@55 | 29 /* when blocked it's waiting for a wakeup on this address */ |
| nuclear@55 | 30 void *wait_addr; |
| nuclear@55 | 31 |
| nuclear@51 | 32 int ticks_left; |
| nuclear@52 | 33 |
| nuclear@52 | 34 /* extends of the process heap, increased by sbrk */ |
| nuclear@52 | 35 |
| nuclear@52 | 36 /* first page of the user stack, extends up to KMEM_START */ |
| nuclear@54 | 37 int user_stack_pg; |
| nuclear@54 | 38 /* first page of the kernel stack, (KERN_STACK_SIZE) */ |
| nuclear@54 | 39 int kern_stack_pg; |
| nuclear@52 | 40 |
| nuclear@42 | 41 struct context ctx; |
| nuclear@51 | 42 |
| nuclear@51 | 43 struct process *next, *prev; /* for the scheduler queues */ |
| nuclear@29 | 44 }; |
| nuclear@29 | 45 |
| nuclear@47 | 46 void init_proc(void); |
| nuclear@47 | 47 |
| nuclear@47 | 48 void context_switch(int pid); |
| nuclear@47 | 49 |
| nuclear@51 | 50 int get_current_pid(void); |
| nuclear@51 | 51 struct process *get_current_proc(void); |
| nuclear@51 | 52 struct process *get_process(int pid); |
| nuclear@51 | 53 |
| nuclear@29 | 54 #endif /* PROC_H_ */ |