[feat] Memory manager

include/memory/heap.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <efi.h>
+
+void  init_heap();
+void* kmalloc(UINTN size);
+void  kfree(void* ptr);
+void* kcalloc(UINTN num, UINTN size);
+void* krealloc(void* ptr, UINTN new_size);

include/memory/pmm.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <efi.h>
+
+#define PAGE_SIZE   4096
+#define PAGE_SHIFT  12
+#define PAGE_MASK   (~(PAGE_SIZE - 1ULL))
+
+typedef struct {
+    UINT8*  bitmap;
+    UINTN   bitmap_size;
+    UINTN   total_pages;
+    UINTN   free_pages;
+    void*   free_list_head;
+    UINT64  base_addr;
+    UINT64  max_addr;
+} pmm_t;
+
+extern pmm_t g_pmm;
+
+EFI_STATUS  pmm_init();
+void*       pmm_alloc_pages(UINTN n);
+void        pmm_free_pages(void* addr, UINTN n);
+UINTN       pmm_get_free_count();
+BOOLEAN     pmm_is_page_free(void* addr);

include/serial.h

@@ -12,4 +12,5 @@ extern serial_context g_serial;
 void serial_init(EFI_SERIAL_IO_PROTOCOL *SerialIo); // 初始化串行驱动
 void serial_write(const char *str);                 // 往串行写string
 void serial_write_char(char c);                     // 往串行写char（不推荐使用）
+void serial_write_hex(UINTN val);                   // 往串行写十六进制数字
 char serial_read_char();                            // 读串行