separate source into kernel/ user/ mkfs/

1 files changed, 0 insertions, 80 deletions

diff --git a/kalloc.c b/kalloc.c
deleted file mode 100644
index 1ed1c49..0000000
--- a/kalloc.c
+++ /dev/null
@@ -1,80 +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 "param.h"
-#include "memlayout.h"
-#include "spinlock.h"
-#include "riscv.h"
-#include "defs.h"
-
-void freerange(void *pa_start, void *pa_end);
-
-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;
-  struct run *freelist;
-} kmem;
-
-void
-kinit()
-{
-  initlock(&kmem.lock, "kmem");
-  freerange(end, (void*)PHYSTOP);
-}
-
-void
-freerange(void *pa_start, void *pa_end)
-{
-  char *p;
-  p = (char*)PGROUNDUP((uint64)pa_start);
-  for(; p + PGSIZE <= (char*)pa_end; 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(void *pa)
-{
-  struct run *r;
-
-  if(((uint64)pa % PGSIZE) != 0 || (char*)pa < end || (uint64)pa >= PHYSTOP)
-    panic("kfree");
-
-  // Fill with junk to catch dangling refs.
-  memset(pa, 1, PGSIZE);
-
-  acquire(&kmem.lock);
-  r = (struct run*)pa;
-  r->next = kmem.freelist;
-  kmem.freelist = r;
-  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.
-void *
-kalloc(void)
-{
-  struct run *r;
-
-  acquire(&kmem.lock);
-  r = kmem.freelist;
-  if(r)
-    kmem.freelist = r->next;
-  release(&kmem.lock);
-  if(r)
-    memset((char*)r, 5, PGSIZE); // fill with junk
-  return (void*)r;
-}