179 lines
6.4 KiB
C
179 lines
6.4 KiB
C
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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proc.h
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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Forrest Yu, 2005
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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
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/* Used to find saved registers in the new kernel stack,
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* for there is no variable name you can use in C.
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* The macro defined below must coordinate with the equivalent in sconst.inc,
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* whose content is used in asm.
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* Note that you shouldn't use saved registers in the old
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* kernel stack, i.e. STACK_FRAME, any more.
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* To access them, use a pointer plus a offset defined
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* below instead.
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* added by xw, 17/12/11
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*/
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#pragma once
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#include "protect.h"
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#define INIT_STACK_SIZE 1024 * 8 //new kernel stack is 8kB
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#define P_STACKBASE 0
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#define GSREG 0
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#define FSREG 1 * 4
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#define ESREG 2 * 4
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#define DSREG 3 * 4
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#define EDIREG 4 * 4
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#define ESIREG 5 * 4
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#define EBPREG 6 * 4
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#define KERNELESPREG 7 * 4
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#define EBXREG 8 * 4
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#define EDXREG 9 * 4
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#define ECXREG 10 * 4
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#define EAXREG 11 * 4
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#define RETADR 12 * 4
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#define EIPREG 13 * 4
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#define CSREG 14 * 4
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#define EFLAGSREG 15 * 4
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#define ESPREG 16 * 4
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#define SSREG 17 * 4
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#define P_STACKTOP 18 * 4
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/*总PCB表数和taskPCB表数*/
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//modified by xw, 18/8/27
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//the memory space we put kernel is 0x30400~0x6ffff, so we should limit kernel size
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// #define NR_PCBS 32 //add by visual 2016.4.5
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// #define NR_K_PCBS 10 //add by visual 2016.4.5
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#define NR_PCBS 12
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//#define NR_TASKS 4 //TestA~TestC + hd_service //deleted by mingxuan 2019-5-19
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#define NR_TASKS 2 //task_tty + hd_service //modified by mingxuan 2019-5-19
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#define NR_K_PCBS 4 //no K_PCB is empty now
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//~xw
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#define NR_CPUS 1 //numbers of cpu. added by xw, 18/6/1
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#define NR_FILES 64 //numbers of files a process can own. added by xw, 18/6/14
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//enum proc_stat {IDLE,READY,WAITING,RUNNING}; //add by visual smile 2016.4.5
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//enum proc_stat {IDLE,READY,SLEEPING}; //eliminate RUNNING state
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enum proc_stat {IDLE,READY,SLEEPING,KILLED}; /* add KILLED state. when a process's state is KILLED, the process
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* won't be scheduled anymore, but all of the resources owned by
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* it is not freed yet.
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* added by xw, 18/12/19
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*/
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#define NR_CHILD_MAX (NR_PCBS-NR_K_PCBS-1) //定义最多子进程/线程数量 //add by visual 2016.5.26
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#define TYPE_PROCESS 0//进程//add by visual 2016.5.26
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#define TYPE_THREAD 1//线程//add by visual 2016.5.26
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typedef struct s_stackframe { /* 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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}STACK_FRAME;
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typedef struct s_tree_info{//进程树记录，包括父进程，子进程，子线程 //add by visual 2016.5.25
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int type; //当前是进程还是线程
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int real_ppid; //亲父进程，创建它的那个进程
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int ppid; //当前父进程
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int child_p_num; //子进程数量
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int child_process[NR_CHILD_MAX];//子进程列表
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int child_t_num; //子线程数量
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int child_thread[NR_CHILD_MAX];//子线程列表
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int text_hold; //是否拥有代码
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int data_hold; //是否拥有数据
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}TREE_INFO;
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typedef struct s_lin_memmap {//线性地址分布结构体 edit by visual 2016.5.25
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u32 text_lin_base; //代码段基址
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u32 text_lin_limit; //代码段界限
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u32 data_lin_base; //数据段基址
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u32 data_lin_limit; //数据段界限
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u32 vpage_lin_base; //保留内存基址
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u32 vpage_lin_limit; //保留内存界限
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u32 heap_lin_base; //堆基址
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u32 heap_lin_limit; //堆界限
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u32 stack_lin_base; //栈基址
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u32 stack_lin_limit; //栈界限（使用时注意栈的生长方向）
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u32 arg_lin_base; //参数内存基址
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u32 arg_lin_limit; //参数内存界限
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u32 kernel_lin_base; //内核基址
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u32 kernel_lin_limit; //内核界限
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u32 stack_child_limit; //分给子线程的栈的界限 //add by visual 2016.5.27
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}LIN_MEMMAP;
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typedef struct s_proc {
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STACK_FRAME regs; /* process registers saved in stack frame */
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u16 ldt_sel; /* gdt selector giving ldt base and limit */
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DESCRIPTOR ldts[LDT_SIZE]; /* local descriptors for code and data */
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char* esp_save_int; //to save the position of esp in the kernel stack of the process
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//added by xw, 17/12/11
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char* esp_save_syscall; //to save the position of esp in the kernel stack of the process
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char* esp_save_context; //to save the position of esp in the kernel stack of the process
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// int save_type; //the cause of process losting CPU //save_type is not needed any more, xw, 18/4/20
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//1st-bit for interruption, 2nd-bit for context, 3rd-bit for syscall
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void* channel; /*if non-zero, sleeping on channel, which is a pointer of the target field
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for example, as for syscall sleep(int n), the target field is 'ticks',
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and the channel is a pointer of 'ticks'.
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*/
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LIN_MEMMAP memmap; //线性内存分部信息 add by visual 2016.5.4
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TREE_INFO info; //记录进程树关系 add by visual 2016.5.25
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int ticks; /* remained ticks */
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int priority;
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u32 pid; /* process id passed in from MM */
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char p_name[16]; /* name of the process */
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enum proc_stat stat; //add by visual 2016.4.5
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u32 cr3; //add by visual 2016.4.5
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//added by zcr
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struct file_desc * filp[NR_FILES];
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//~zcr
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}PROCESS_0;
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//new PROCESS struct with PCB and process's kernel stack
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//added by xw, 17/12/11
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typedef union task_union {
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PROCESS_0 task;
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char stack[INIT_STACK_SIZE/sizeof(char)];
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}PROCESS;
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typedef struct s_task {
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task_f initial_eip;
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int stacksize;
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char name[32];
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}TASK;
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#define STACK_SIZE_TASK 0x1000 //add by visual 2016.4.5
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//#define STACK_SIZE_TOTAL (STACK_SIZE_TASK*NR_PCBS) //edit by visual 2016.4.5
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//added by zcr
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#define proc2pid(x) (x - proc_table)
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