feat: Implement the first user program of the lume OS

4 files changed, 28 insertions, 15 deletions

diff --git a/include/kernel/mm.h b/include/kernel/mm.h
index 0f7c73d..07d675b 100644
--- a/include/kernel/mm.h
+++ b/include/kernel/mm.h
@@ -3,19 +3,20 @@
 
 namespace VM
 {
-    typedef uint64_t* pagetable_t;
+    typedef uint64_t *pagetable_t;
     typedef uint64_t pte_t;
-    typedef uint64_t uint64;
-
-    #define PTE_V (1L << 0)
-    #define PTE_R (1L << 1)
-    #define PTE_W (1L << 2)
-    #define PTE_X (1L << 3)
-    #define PTE_U (1L << 4)
-
-    #define SATP_SV39 (8L << 60)
-    #define MAKE_SATP(pagetable) (SATP_SV39 | (((uint64)pagetable) >> 12))
 
+    pte_t *walk(pagetable_t pagetable, uint64 va, int alloc);
+    int mappages(pagetable_t pagetable, uint64 va, uint64 size, uint64 pa, int perm);
+    void kvmmap(uint64 va, uint64 pa, uint64 sz, int perm);
     void kvminit();
     void kvminithart();
+    pagetable_t uvmcreate();
+    void uvminit(pagetable_t pagetable, uchar *src, uint sz);
+    void uvmunmap(pagetable_t pagetable, uint64 va, uint64 npages, int do_free);
+    void uvmfree(pagetable_t pagetable, uint64 sz);
+    int uvmcopy(pagetable_t oldpt, pagetable_t newpt, uint64 sz);
+    uint64 uvmalloc(pagetable_t pagetable, uint64 oldsz, uint64 newsz);
+    uint64 uvmdealloc(pagetable_t pagetable, uint64 oldsz, uint64 newsz);
+    int copyin(pagetable_t pagetable, char *dst, uint64 srcva, uint64 len);
 }
\ No newline at end of file
diff --git a/include/kernel/proc.h b/include/kernel/proc.h
index 89a3db7..559b137 100644
--- a/include/kernel/proc.h
+++ b/include/kernel/proc.h
@@ -1,5 +1,6 @@
 #pragma once
 #include "common/types.h"
+#include "kernel/trap.h"
 
 struct Context
 {
@@ -32,18 +33,20 @@ enum ProcState{
 struct Proc
 {
     struct Context context;
+    struct Trapframe *tf;
+
+    uint64 *pagetable;
 
     enum ProcState state;
     int pid;
 
     void* kstack;
     char name[16];
+    uint64 sz;
 
     //
 };
 
-inline void intr_on() { asm volatile("csrs sstatus, 0x2"); }
-inline void intr_off() { asm volatile("csrc sstatus, 0x2"); }
 
 namespace ProcManager
 {
@@ -52,4 +55,10 @@ namespace ProcManager
     void yield();
 
     void create_kernel_thread(void (*func)(), const char *name);
-}
\ No newline at end of file
+
+    void user_init();
+}
+
+void forkret();
+struct Proc *myproc();
+void usertrapret();
\ No newline at end of file
diff --git a/include/kernel/riscv.h b/include/kernel/riscv.h
index 257c54f..4b3d323 100644
--- a/include/kernel/riscv.h
+++ b/include/kernel/riscv.h
@@ -398,3 +398,5 @@ typedef uint64 *pagetable_t; // 512 PTEs
 // Sv39, to avoid having to sign-extend virtual addresses
 // that have the high bit set.
 #define MAXVA (1L << (9 + 9 + 9 + 12 - 1))
+#define TRAMPOLINE (MAXVA - PGSIZE)
+#define TRAPFRAME (TRAMPOLINE - PGSIZE)
\ No newline at end of file
diff --git a/include/kernel/trap.h b/include/kernel/trap.h
index fd51ef6..79bb037 100644
--- a/include/kernel/trap.h
+++ b/include/kernel/trap.h
@@ -47,4 +47,5 @@ namespace Trap
     void init();
     extern "C" void kernelvec();
     extern "C" void kerneltrap(struct Trapframe *tf);
-}
\ No newline at end of file
+}
+extern "C" void usertrap();
\ No newline at end of file