mmu: Make certain allocations physical and virtual mapping linear

Previously it was possible for fragmentation to occur and as a result
certain allocations would have a linear virtual address space but not a
linear physical address space. This is bad since a lot of calls to
kmalloc_align rely upon both being linear, it has now been changed such
that all allocations done by kmalloc_align now guarantee this mapping
holds for both virtual and physical addresses.

It was due to oversight and sheer luck that this had been working for so
long.

1 files changed, 0 insertions, 40 deletions

diff --git a/kernel/ksbrk.c b/kernel/ksbrk.c
deleted file mode 100644
index 82fc5ed..0000000
--- a/kernel/ksbrk.c
+++ /dev/null
@@ -1,40 +0,0 @@
-#include <assert.h>
-#include <ksbrk.h>
-#include <mmu.h>
-#include <stddef.h>
-#include <typedefs.h>
-
-/*
-extern uintptr_t data_end;
-extern PageDirectory *kernel_directory;
-
-#define HEAP 0x00E00000
-#define PHYS 0x403000
-#define PAGE_SIZE ((uintptr_t)0x1000)
-void *ksbrk(size_t s) {
-  uintptr_t rc = (uintptr_t)align_page((void *)data_end);
-  data_end += s;
-  data_end = (uintptr_t)align_page((void *)data_end);
-
-  if (!get_active_pagedirectory()) {
-    // If there is no active pagedirectory we
-    // just assume that the memory is
-    // already mapped.
-    return (void *)rc;
-  }
-  mmu_allocate_shared_kernel_region((void *)rc, (data_end - (uintptr_t)rc));
-  assert(((uintptr_t)rc % PAGE_SIZE) == 0);
-  memset((void *)rc, 0xFF, s);
-  return (void *)rc;
-}
-
-void *ksbrk_physical(size_t s, void **physical) {
-  void *r = ksbrk(s);
-  if (physical) {
-    //    if (0 == get_active_pagedirectory())
-    //      *physical = (void *)((uintptr_t)r - (0xC0000000 + PHYS) + HEAP);
-    //    else
-    *physical = (void *)virtual_to_physical(r, 0);
-  }
-  return r;
-}*/