78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
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#ifndef __KERN_PROCESS_PROC_H__
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#define __KERN_PROCESS_PROC_H__
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#include <defs.h>
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#include <list.h>
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#include <trap.h>
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#include <memlayout.h>
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// process's state in his life cycle
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enum proc_state {
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PROC_UNINIT = 0, // uninitialized
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PROC_SLEEPING, // sleeping
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PROC_RUNNABLE, // runnable(maybe running)
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PROC_ZOMBIE, // almost dead, and wait parent proc to reclaim his resource
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};
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// Saved registers for kernel context switches.
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// Don't need to save all the %fs etc. segment registers,
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// because they are constant across kernel contexts.
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// Save all the regular registers so we don't need to care
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// which are caller save, but not the return register %eax.
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// (Not saving %eax just simplifies the switching code.)
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// The layout of context must match code in switch.S.
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struct context {
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uint32_t eip;
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uint32_t esp;
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t esi;
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uint32_t edi;
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uint32_t ebp;
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};
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#define PROC_NAME_LEN 15
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#define MAX_PROCESS 4096
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#define MAX_PID (MAX_PROCESS * 2)
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extern list_entry_t proc_list;
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struct proc_struct {
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enum proc_state state; // Process state
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int pid; // Process ID
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int runs; // the running times of Proces
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uintptr_t kstack; // Process kernel stack
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volatile bool need_resched; // bool value: need to be rescheduled to release CPU?
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struct proc_struct *parent; // the parent process
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struct mm_struct *mm; // Process's memory management field
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struct context context; // Switch here to run process
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struct trapframe *tf; // Trap frame for current interrupt
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uintptr_t cr3; // CR3 register: the base addr of Page Directroy Table(PDT)
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uint32_t flags; // Process flag
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char name[PROC_NAME_LEN + 1]; // Process name
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list_entry_t list_link; // Process link list
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list_entry_t hash_link; // Process hash list
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};
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#define le2proc(le, member) \
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to_struct((le), struct proc_struct, member)
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extern struct proc_struct *idleproc, *initproc, *current;
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void proc_init(void);
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void proc_run(struct proc_struct *proc);
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int kernel_thread(int (*fn)(void *), void *arg, uint32_t clone_flags);
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char *set_proc_name(struct proc_struct *proc, const char *name);
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char *get_proc_name(struct proc_struct *proc);
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void cpu_idle(void) __attribute__((noreturn));
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struct proc_struct *find_proc(int pid);
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int do_fork(uint32_t clone_flags, uintptr_t stack, struct trapframe *tf);
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int do_exit(int error_code);
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#endif /* !__KERN_PROCESS_PROC_H__ */
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