Fix mmap_parse

src/kernel/mem/mmap.c

@@ -13,6 +13,7 @@ uint32_t mmap_number_of_entries;
 multiboot_memory_map_t *mmap_entries;
 uint8_t count_physical_reserved;
 uint32_t _mmap_last_available_item;
+size_t _mmap_phys_memory_avail; // This variable contains the memory size
 
 const char *mmap_types[] = {
  "Invalid",
@@ -26,8 +27,7 @@ const char *mmap_types[] = {
 // This function is apparently only printing the list of mmap items and their value.
 void _mmap_parse(struct multiboot_tag_mmap *mmap_root){
  int total_entries = 0;
- size_t phys_memory_avail= 0;
- size_t total_phys_memory = 0;
+ _mmap_phys_memory_avail= 0;
  pretty_logf(Verbose, "size: 0x%x", sizeof(struct multiboot_tag_mmap));
  mmap_number_of_entries = (mmap_root->size - sizeof(*mmap_root))/mmap_root->entry_size;
  size_t mmap_number_of_entries_2 = (mmap_root->size - sizeof(struct multiboot_tag_mmap))/mmap_root->entry_size;
@@ -42,16 +42,14 @@ void _mmap_parse(struct multiboot_tag_mmap *mmap_root){
  pretty_logf(Verbose, "\t[%d] Address: 0x%x - Len: 0x%x Type: (%d) %s", i, mmap_entries[i].addr, mmap_entries[i].len, mmap_entries[i].type, (char *) mmap_types[mmap_entries[i].type]);
 
  if ( mmap_entries[i].type == 1 ) {
- phys_memory_avail += mmap_entries[i].len;
+ _mmap_phys_memory_avail += mmap_entries[i].len;
  _mmap_last_available_item = i;
  }
 
- total_phys_memory += mmap_entries[i].len;
-
  total_entries++;
  i++;
  }
- pretty_logf(Verbose, "Total entries: %d - Total phys_mem: 0x%u - Phys mem_avail: 0x%u", total_entries, total_phys_memory, phys_memory_avail );
+ pretty_logf(Verbose, "Total entries: %d - Phys mem_avail: 0x%u", total_entries, _mmap_phys_memory_avail );
 #endif
 }
 
@@ -61,9 +59,9 @@ void _mmap_setup(){
  count_physical_reserved=0;
  if(used_frames > 0){
  uint32_t counter = 0;
- uint64_t mem_limit = (tagmem->mem_upper + 1024) * 1024;
  while(counter < mmap_number_of_entries){
- if (mmap_entries[counter].addr < mem_limit &&
+ uint64_t upper_address_to_map = (mmap_entries[_mmap_last_available_item].addr + mmap_entries[_mmap_last_available_item].len);
+ if (mmap_entries[counter].addr < upper_address_to_map &&
  mmap_entries[counter].type > 1){
  pretty_logf(Verbose, "\tFound unusable entry at addr: %x", mmap_entries[counter].addr);
  pmm_reserve_area(mmap_entries[counter].addr, mmap_entries[counter].len);