kvmmake() makes a complete kernel page table, matching Figure 3.3

1 files changed, 18 insertions, 11 deletions

diff --git a/kernel/proc.c b/kernel/proc.c
index 56314e5..d847c43 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -21,6 +21,23 @@ static void freeproc(struct proc *p);
 
 extern char trampoline[]; // trampoline.S
 
+
+// Allocate a page for each process's kernel stack.
+// Map it high in memory, followed by an invalid
+// guard page.
+void
+proc_mapstacks(pagetable_t kpgtbl) {
+  struct proc *p;
+  
+  for(p = proc; p < &proc[NPROC]; p++) {
+    char *pa = kalloc();
+    if(pa == 0)
+      panic("kalloc");
+    uint64 va = KSTACK((int) (p - proc));
+    kvmmap(kpgtbl, va, (uint64)pa, PGSIZE, PTE_R | PTE_W);
+  }
+}
+
 // initialize the proc table at boot time.
 void
 procinit(void)
@@ -30,18 +47,8 @@ procinit(void)
   initlock(&pid_lock, "nextpid");
   for(p = proc; p < &proc[NPROC]; p++) {
       initlock(&p->lock, "proc");
-
-      // Allocate a page for the process's kernel stack.
-      // Map it high in memory, followed by an invalid
-      // guard page.
-      char *pa = kalloc();
-      if(pa == 0)
-        panic("kalloc");
-      uint64 va = KSTACK((int) (p - proc));
-      kvmmap(va, (uint64)pa, PGSIZE, PTE_R | PTE_W);
-      p->kstack = va;
+      p->kstack = KSTACK((int) (p - proc));
   }
-  kvminithart();
 }
 
 // Must be called with interrupts disabled,