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_ */