Move heap to separate file

src/Makefile

@@ -35,6 +35,7 @@ OBJS += info.c.o
 
 OBJS += protected.c.o
 OBJS += interrupts.c.o interrupts.asm.cpp.o
+OBJS += heap.c.o
 
 all: $(KERNEL)
 

src/heap.c

@@ -0,0 +1,15 @@
+#include <kernaux/free_list.h>
+#include <kernaux/generic/malloc.h>
+
+#include <stddef.h>
+
+static char memory[8192];
+static struct KernAux_FreeList free_list;
+
+const KernAux_Malloc heap_malloc = &free_list.malloc;
+
+void heap_initialize()
+{
+    KernAux_FreeList_init(&free_list, NULL);
+    KernAux_FreeList_add_zone(&free_list, memory, sizeof(memory));
+}

src/heap.h

@@ -0,0 +1,10 @@
+#ifndef KERNAUX_INCLUDED_HEAP
+#define KERNAUX_INCLUDED_HEAP
+
+#include <kernaux/generic/malloc.h>
+
+extern const KernAux_Malloc heap_malloc;
+
+void heap_initialize();
+
+#endif

src/main.c

@@ -4,12 +4,12 @@
 
 #include "info.h"
 
+#include "heap.h"
 #include "panic.h"
 #include "protected.h"
 #include "interrupts.h"
 
 #include <drivers/console.h>
-#include <kernaux/free_list.h>
 #include <kernaux/generic/display.h>
 #include <kernaux/macro.h>
 #include <kernaux/memmap.h>
@@ -29,9 +29,6 @@ extern uint8_t _kernel_virt_base;
 extern uint8_t _kernel_stack_start;
 extern uint8_t _kernel_stack_size;
 
-static char free_list_memory[8192];
-static struct KernAux_FreeList free_list;
-
 static KernAux_Memmap memmap = NULL;
 
 static struct Kernel_Info kinfo;
@@ -62,15 +59,13 @@ void main(
         panic("Multiboot 2 info is invalid.");
     }
 
-    KernAux_FreeList_init(&free_list, NULL);
+    heap_initialize();
-    KernAux_FreeList_add_zone(&free_list,
-                              free_list_memory, sizeof(free_list_memory));
 
     {
         const KernAux_Memmap_Builder builder =
             KernAux_Multiboot2_Info_to_memmap_builder(
                 multiboot2_info,
-                &free_list.malloc
+                heap_malloc
             );
         assert(builder, "builder");
         memmap = KernAux_Memmap_Builder_finish_and_free(builder);