no more pminit, or ELF header at 0x10000

kinit() knows about end and PHYSTOP
map all of kernel read/write (rather than r/o instructions)
thanks, austin

1 files changed, 5 insertions, 3 deletions

diff --git a/kalloc.c b/kalloc.c
index 65de759..8c9ff93 100644
--- a/kalloc.c
+++ b/kalloc.c
@@ -19,11 +19,13 @@ struct {
 
 // Initialize free list of physical pages.
 void
-kinit(char *p, uint len)
+kinit(void)
 {
+  extern char end[];
+
   initlock(&kmem.lock, "kmem");
-  char *p1 = (char*)PGROUNDUP((uint)p);
-  char *p2 = PGROUNDDOWN(p + len);
+  char *p1 = (char*)PGROUNDUP((uint)end);
+  char *p2 = PGROUNDDOWN(PHYSTOP);
   for( ; p1 < p2; p1 += 4096)
     kfree(p1);
 }