From 11501f6f0c82712ea5f172f9177f2375c87d06e9 Mon Sep 17 00:00:00 2001
From: Nathan Lee <me@nwlee.tech>
Date: Sun, 30 Aug 2026 22:46:22 -0500
Subject: add buddy allocator and remove the old freelist allocator

- todo later: add other allocators (vmalloc + multi-page allocator)
- todo later: initialize memory pages
- the current kmalloc will not work anyways
---
 include/sys/mem.h | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

(limited to 'include')

diff --git a/include/sys/mem.h b/include/sys/mem.h
index e5637f6..0cc509f 100644
--- a/include/sys/mem.h
+++ b/include/sys/mem.h
@@ -1,19 +1,22 @@
 #pragma once
 #include <sys/stddef.h>
 
+#define PAGE_SIZE 4096
+#define EHEAP_SIZE (512 * 1024)
+
 struct mem_info {
     void* start;
     size_t size;
 };
 
-enum PageStatus {
-    MEMPAGE_FREE, MEMPAGE_USED
+enum AllocationType {
+    MEMPAGE_FREEPAGE, MEMPAGE_ROUNDPAGE, MEMPAGE_VIRTUAL    
 };
 
-struct page {
-    struct page* next;
+struct free_list {
+    struct free_list *next;
+    struct free_list *prev;
     size_t size;
-    enum PageStatus status;
 };
 
 struct mmio_device_meta {
@@ -22,10 +25,9 @@ struct mmio_device_meta {
     size_t size;
 };
 
-void* kmalloc(size_t size);
 void* kemalloc(size_t size);
-void* kzalloc(size_t size);
-void kfree(void* ptr);
 
-void km_init(struct mem_info *info);
+void* kmalloc(size_t size, enum AllocationType type);
+void* kzalloc(size_t size, enum AllocationType type);
+void kfree(void* ptr);
 
-- 
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