Split up boot.s into multiple assembly definitions, Started page frame allocator implementation, kterm definition is now considered c plus plus

2021-11-03 20:03:38 +01:00
parent bdcf9e66f8
commit d79fc6e8e2
18 changed files with 695 additions and 725 deletions
--- a/src/kernel/memory/PageFrameAllocator.cpp
+++ b/src/kernel/memory/PageFrameAllocator.cpp
@ -0,0 +1,38 @@
+#include "PageFrameAllocator.h"
+
+
+MemoryInfo memInfo {};
+void mapMultibootMemoryMap( multiboot_info_t *mbt){
+    printf("mmap_addr = 0x%x, mmap_length = 0x%x\n",
+    (unsigned) mbt->mmap_addr, (unsigned) mbt->mmap_length);
+    multiboot_memory_map_t *mmap = (multiboot_memory_map_t*) mbt->mmap_addr;
+
+    for (;  (unsigned long) mmap < mbt->mmap_addr + mbt->mmap_length;  mmap = (multiboot_memory_map_t *) ((unsigned long) mmap + mmap->size + sizeof(mmap->size))){
+
+            if ( mmap->type == MULTIBOOT_MEMORY_AVAILABLE){
+                memInfo.memorySizeInBytes +=  mmap->len;   
+            } else {
+                memInfo.reservedMemoryInBytes += mmap->len;
+            }
+            
+            print_Multiboot_memory_Map(mmap);
+            
+        }
+    uint32_t memorySizeInGiB = memInfo.memorySizeInBytes / 1073741824; 
+
+    printf("Available Memory: 0x%x bytes, 0x%x GiB\n",  memInfo.memorySizeInBytes, memorySizeInGiB );
+    printf("Reserved Memory: 0x%x bytes\n",  memInfo.reservedMemoryInBytes );
+
+}
+
+void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap){
+    printf(
+        "size = 0x%x, base_addr = 0x%x%08x, length = 0x%x%08x, type = 0x%x\n",
+        (unsigned) mmap->size,
+        (unsigned) (mmap->addr >> 32),
+        (unsigned) (mmap->addr & 0xffffffff),
+        (unsigned) (mmap->len >> 32),
+        (unsigned) (mmap->len & 0xffffffff),
+        (unsigned) mmap->type
+    );
+}