Added stubs for the kernel memory manager

Makefile

@@ -22,7 +22,7 @@ ARCH_OBJ := $(addprefix $(BUILD_DIR)/,$(ARCH_C_FILES:.c=.o) $(ARCH_ASM_FILES:.S=
 # Platform-independent kernel source files
 ####################################
 
-KERNEL_SRC_DIRS := init kernel
+KERNEL_SRC_DIRS := init kernel vm
 KERNEL_C_FILES := $(foreach dir,$(KERNEL_SRC_DIRS),$(wildcard $(dir)/*.c))
 KERNEL_OBJ := $(addprefix $(BUILD_DIR)/,$(KERNEL_C_FILES:.c=.o))
 

include/socks/vm.h

@@ -0,0 +1,31 @@
+#ifndef SOCKS_VM_H_
+#define SOCKS_VM_H_
+
+#include <socks/status.h>
+#include <socks/compiler.h>
+
+typedef struct vm_map_entry {
+	int reserved;
+} vm_map_entry_t;
+
+typedef struct vm_map {
+	int reserved;
+} vm_map_t;
+
+typedef struct vm_object {
+	int reserved;
+} vm_object_t;
+
+typedef struct vm_page {
+	char padding[64];
+} __packed vm_page_t;
+
+extern kern_status_t vm_bootstrap(void);
+
+extern vm_map_t *vm_map_create(void);
+
+extern vm_object_t *vm_object_create(void);
+
+extern void vm_page_init(vm_page_t *page);
+
+#endif

vm/vm_bootstrap.c

@@ -0,0 +1,6 @@
+#include <socks/status.h>
+
+kern_status_t vm_bootstrap(void)
+{
+	return KERN_ERR_UNIMPLEMENTED;
+}

vm/vm_map.c

@@ -0,0 +1,7 @@
+#include <socks/vm.h>
+#include <stddef.h>
+
+vm_map_t *vm_map_create(void)
+{
+	return NULL;
+}

vm/vm_object.c

@@ -0,0 +1,7 @@
+#include <socks/vm.h>
+#include <stddef.h>
+
+vm_object_t *vm_object_create(void)
+{
+	return NULL;
+}

vm/vm_page.c

@@ -0,0 +1,6 @@
+#include <socks/vm.h>
+
+void vm_page_init(vm_page_t *page)
+{
+
+}