Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

include/mm/kmalloc.h

@@ -0,0 +1,18 @@
+#ifndef _MM_KMALLOC_H
+#define _MM_KMALLOC_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+void heap_init(void);
+void* kmalloc(size_t size);
+void* kzalloc(size_t size);
+void* krealloc(void* ptr, size_t new_size);
+void  kfree(void* ptr);
+
+size_t heap_get_used_bytes(void);
+size_t heap_get_free_bytes(void);
+size_t heap_get_total_bytes(void);
+
+#endif // _MM_KMALLOC_H

include/mm/pmm.h

@@ -0,0 +1,36 @@
+#ifndef _MM_PMM_H
+#define _MM_PMM_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define PMM_PAGE_SIZE 4096
+
+// E820 Memory Map entry structure
+typedef struct {
+    uint64_t base;
+    uint64_t length;
+    uint32_t type;
+    uint32_t acpi_attr;
+} __attribute__((packed)) e820_entry_t;
+
+#define E820_TYPE_USABLE        1
+#define E820_TYPE_RESERVED      2
+#define E820_TYPE_ACPI_RECLAIM  3
+#define E820_TYPE_ACPI_NVS      4
+#define E820_TYPE_BAD           5
+
+void pmm_init(void* memory_map, uint64_t memory_map_count);
+void* pmm_alloc_page(void);
+void* pmm_alloc_pages(size_t count);
+void pmm_free_page(void* page);
+void pmm_free_pages(void* page, size_t count);
+
+uint64_t pmm_get_total_pages(void);
+uint64_t pmm_get_used_pages(void);
+uint64_t pmm_get_free_pages(void);
+uint64_t pmm_get_total_memory(void);
+uint64_t pmm_get_usable_memory(void);
+
+#endif // _MM_PMM_H