Merge pull request #4 from Richard-Qin-001/dev/shell

Rebuilt the system's underlying structure; it is now stable enough to merge. 

The system now supports a read-only file system and has a simple shell implemented.

1 files changed, 69 insertions, 0 deletions

diff --git a/include/kernel/proc_def.h b/include/kernel/proc_def.h
new file mode 100644
index 0000000..5ce4c03
--- /dev/null
+++ b/include/kernel/proc_def.h
@@ -0,0 +1,69 @@
+#pragma once
+#include "common/types.h"
+#include "common/fcntl.h"
+
+struct cpu;
+struct Trapframe;
+class Inode;
+struct file;
+
+enum ProcState
+{
+    UNUSED,
+    USED,
+    SLEEPING,
+    RUNNABLE,
+    RUNNING,
+    ZOMBIE,
+};
+
+#define PRIO_MAX 0
+#define PRIO_MIN 3
+#define N_PRIO 4
+
+// Context structure
+struct Context
+{
+    uint64 ra;
+    uint64 sp;
+    uint64 s0;
+    uint64 s1;
+    uint64 s2;
+    uint64 s3;
+    uint64 s4;
+    uint64 s5;
+    uint64 s6;
+    uint64 s7;
+    uint64 s8;
+    uint64 s9;
+    uint64 s10;
+    uint64 s11;
+};
+
+struct Proc
+{
+    struct Context context;
+    struct Trapframe *tf;
+    uint64 *pagetable;
+    enum ProcState state;
+    int pid;
+    void *kstack;
+    char name[16];
+    uint64 sz;
+    struct Proc *parent;
+    void *chan;
+    int xstate;
+
+    Inode *cwd;
+    struct file *ofile[NOFILE];
+
+    struct Proc *next;
+    struct Proc *prev;
+
+    struct Proc *all_next;
+    struct Proc *all_prev;
+
+    int priority;
+    int ticks;
+    struct cpu *cpu;
+};
\ No newline at end of file