feat: Initial PMM implementation

Introduce the foundational Physical Memory Manager (PMM) and restructure the project for modularity.
Implemented basic PMM and related memory management headers (mm/pmm.h, mm/vm.h).
Updated Makefile and build process to support new modular structure.

1 files changed, 13 insertions, 0 deletions

diff --git a/include/kernel/pmm.h b/include/kernel/pmm.h
new file mode 100644
index 0000000..3328450
--- /dev/null
+++ b/include/kernel/pmm.h
@@ -0,0 +1,13 @@
+#pragma once
+#include "common/types.h"
+
+#define PHYSTOP (0x80000000 + 128 * 1024 * 1024)
+#define PGSIZE 4096
+
+namespace PMM{
+    void init();
+
+    void* alloc_page();
+
+    void free_page(void* pa);
+}
\ No newline at end of file