feat: added a basic malloc implementation and started work on memory

management

yak-kernel/src/rt/core/mem/memmap.c

@@ -0,0 +1,41 @@
+//
+// Created by rick on 4-10-23.
+//
+
+#include <stdint.h>
+#include <stdio.h>
+#include <yak/rt/panic.h>
+
+#include <yak/rt/core/mem/memmap.h>
+
+#define MEMMAP_ENTRIES 64
+
+
+typedef struct {
+    uintptr_t address;
+    size_t length;
+    uint8_t type;
+} mmap_entry;
+mmap_entry memmap[MEMMAP_ENTRIES] = {0};
+
+void memmap_put_entry(uintptr_t address, size_t length, uint8_t type) {
+    if (type == MMAP_TYPE_UNDEFINED || type > MMAP_LAST_TYPE) {
+        panic("Bad memory type");
+    }
+    if ((address & 0xFFF) != 0) {
+        printf("MMap entry %8lx is not page aligned\n", address);
+    }
+    if (length % 4096 != 0) {
+        printf("MMap entry %8lx not a full page %8lx\n", address, length);
+    }
+
+    for (int i = 0; i < MEMMAP_ENTRIES; ++i) {
+        if (memmap[i].type == 0) {
+            memmap[i].address = address;
+            memmap[i].length = length;
+            memmap[i].type = type;
+            return;
+        }
+    }
+    panic("No space left in memory map");
+}