1 files changed, 0 insertions, 96 deletions
diff --git a/kalloc.c b/kalloc.c
deleted file mode 100644
index 14cd4f4..0000000
--- a/kalloc.c
+++ /dev/null
@@ -1,96 +0,0 @@
-// Physical memory allocator, intended to allocate
-// memory for user processes, kernel stacks, page table pages,
-// and pipe buffers. Allocates 4096-byte pages.
-
-#include "types.h"
-#include "defs.h"
-#include "param.h"
-#include "memlayout.h"
-#include "mmu.h"
-#include "spinlock.h"
-
-void freerange(void *vstart, void *vend);
-extern char end[]; // first address after kernel loaded from ELF file
-                   // defined by the kernel linker script in kernel.ld
-
-struct run {
-  struct run *next;
-};
-
-struct {
-  struct spinlock lock;
-  int use_lock;
-  struct run *freelist;
-} kmem;
-
-// Initialization happens in two phases.
-// 1. main() calls kinit1() while still using entrypgdir to place just
-// the pages mapped by entrypgdir on free list.
-// 2. main() calls kinit2() with the rest of the physical pages
-// after installing a full page table that maps them on all cores.
-void
-kinit1(void *vstart, void *vend)
-{
-  initlock(&kmem.lock, "kmem");
-  kmem.use_lock = 0;
-  freerange(vstart, vend);
-}
-
-void
-kinit2(void *vstart, void *vend)
-{
-  freerange(vstart, vend);
-  kmem.use_lock = 1;
-}
-
-void
-freerange(void *vstart, void *vend)
-{
-  char *p;
-  p = (char*)PGROUNDUP((uint)vstart);
-  for(; p + PGSIZE <= (char*)vend; p += PGSIZE)
-    kfree(p);
-}
-//PAGEBREAK: 21
-// Free the page of physical memory pointed at by v,
-// which normally should have been returned by a
-// call to kalloc().  (The exception is when
-// initializing the allocator; see kinit above.)
-void
-kfree(char *v)
-{
-  struct run *r;
-
-  if((uint)v % PGSIZE || v < end || V2P(v) >= PHYSTOP)
-    panic("kfree");
-
-  // Fill with junk to catch dangling refs.
-  memset(v, 1, PGSIZE);
-
-  if(kmem.use_lock)
-    acquire(&kmem.lock);
-  r = (struct run*)v;
-  r->next = kmem.freelist;
-  kmem.freelist = r;
-  if(kmem.use_lock)
-    release(&kmem.lock);
-}
-
-// Allocate one 4096-byte page of physical memory.
-// Returns a pointer that the kernel can use.
-// Returns 0 if the memory cannot be allocated.
-char*
-kalloc(void)
-{
-  struct run *r;
-
-  if(kmem.use_lock)
-    acquire(&kmem.lock);
-  r = kmem.freelist;
-  if(r)
-    kmem.freelist = r->next;
-  if(kmem.use_lock)
-    release(&kmem.lock);
-  return (char*)r;
-}
-