109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
#ifndef MINIOS_KERN_PROCESS_H
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#define MINIOS_KERN_PROCESS_H
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#include <type.h>
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#include <mmu.h>
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/* pcb中存储用户态进程的寄存器信息 */
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struct user_context { /* proc_ptr points here ↑ Low */
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u32 gs; /* ┓ │ */
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u32 fs; /* ┃ │ */
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u32 es; /* ┃ │ */
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u32 ds; /* ┃ │ */
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u32 edi; /* ┃ │ */
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u32 esi; /* ┣ pushed by save() │ */
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u32 ebp; /* ┃ │ */
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u32 kernel_esp; /* <- 'popad' will ignore it │ */
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u32 ebx; /* ┃ ↑栈从高地址往低地址增长 */
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u32 edx; /* ┃ │ */
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u32 ecx; /* ┃ │ */
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u32 eax; /* ┛ │ */
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u32 retaddr; /* return address for assembly code save() │ */
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u32 eip; /* ┓ │ */
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u32 cs; /* ┃ │ */
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u32 eflags; /* ┣ these are pushed by CPU during interrupt │ */
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u32 esp; /* ┃ │ */
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u32 ss; /* ┛ ┷High */
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};
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struct kern_context {
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u32 eflags;
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u32 edi;
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u32 esi;
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u32 ebp;
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u32 ebx;
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u32 edx;
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u32 ecx;
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u32 eax;
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u32 esp;
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};
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enum proc_statu {IDLE, READY, SLEEP, ZOMBIE, INITING};
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typedef struct s_proc PROCESS_0;
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/*
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* 记录进程所申请的所有物理页面，用单向链表维护
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* 对于非物理页面（页表，页目录表cr3）的那些页面，其laddr被置为-1
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* 对于物理页面，会维护物理页面对应的线性地址首地址
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*/
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struct page_node {
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struct page_node *nxt;
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phyaddr_t paddr;
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uintptr_t laddr;
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};
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/*
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* 维护进程树儿子的信息，由双向链表维护
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*/
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struct son_node {
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struct son_node *pre;
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struct son_node *nxt;
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PROCESS_0 *p_son;
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};
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struct tree_node {
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PROCESS_0 *p_fa;
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struct son_node *sons;
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};
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/* pcb */
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struct s_proc {
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struct user_context user_regs;
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struct kern_context kern_regs;
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u32 lock;
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enum proc_statu statu;
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u32 pid;
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phyaddr_t cr3;
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struct page_node *page_list;
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int exit_code;
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int priority;
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int ticks;
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struct tree_node fork_tree;
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};
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#define KERN_STACKSIZE (8 * KB)
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typedef union u_proc {
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PROCESS_0 pcb; // 内核pcb
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char _pad[KERN_STACKSIZE]; // pcb往上剩下的空间用于内核栈
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}PROCESS; // 通过union控制每个进程占8kb空间
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/* 指向当前进程pcb的指针 */
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// kern/main.c
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extern PROCESS *p_proc_ready;
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/* pcb表 */
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#define PCB_SIZE 20
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// kern/main.c
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extern PROCESS proc_table[];
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// 内核栈切换上下文函数(汇编接口)
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void switch_kern_context(
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struct kern_context *current_context,
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struct kern_context *next_context
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);
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// 处理函数
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u32 kern_get_pid(PROCESS_0 *p_proc);
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#endif /* MINIOS_KERN_PROCESS_H */ |