diff --git a/reactos/include/reactos/ppcboot.h b/reactos/include/reactos/ppcboot.h
index c28ed643ab1..f06a26dc741 100644
--- a/reactos/include/reactos/ppcboot.h
+++ b/reactos/include/reactos/ppcboot.h
@@ -1,10 +1,46 @@
 #ifndef REACTOS_PPCBOOT_H
 #define REACTOS_PPCBOOT_H
 
+typedef enum _PPC_DT_BOOLEAN 
+{
+    PPC_DT_FALSE, PPC_DT_TRUE
+} PPC_DT_BOOLEAN;
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+typedef void * (*PPC_DEVICE_ALLOC)(int bytes);
+typedef void (*PPC_DEVICE_FREE)(void *data);
+
+typedef struct _PPC_DEVICE_NODE
+{
+    int type;
+    int parent;
+    short this_size, total_size;
+    short value_offset, value_size;
+    char name[1];
+} PPC_DEVICE_NODE, *PPPC_DEVICE_NODE;
+
+typedef struct _PPC_DEVICE_TREE
+{
+    int alloc_size, alloc_step, align, used_bytes;
+    PPC_DEVICE_ALLOC allocFn;
+    PPC_DEVICE_FREE freeFn;
+    PPPC_DEVICE_NODE head, active;
+} PPC_DEVICE_TREE, *PPPC_DEVICE_TREE;
+
+typedef struct _PPC_DEVICE_RANGE
+{
+    int type;
+    void *start;
+    int len;
+} PPC_DEVICE_RANGE, *PPPC_DEVICE_RANGE;
+
 typedef char font_char[57];
 typedef struct _boot_infos_t {
     void *loaderBlock;
-    int machineType;
+    PPPC_DEVICE_NODE machine;
     int dispDeviceRect[4];
     int dispDeviceRowBytes;
     int dispDeviceDepth;
@@ -12,4 +48,36 @@ typedef struct _boot_infos_t {
     font_char *dispFont;
 } boot_infos_t;
 
+PPC_DT_BOOLEAN PpcDevTreeInitialize
+(PPPC_DEVICE_TREE tree, int alloc_step, int align,
+ PPC_DEVICE_ALLOC allocFn, PPC_DEVICE_FREE freeFn);
+PPPC_DEVICE_NODE PpcDevTreeGetRootNode(PPPC_DEVICE_TREE tree);
+PPC_DT_BOOLEAN PpcDevTreeNodeIsChild
+(PPPC_DEVICE_NODE parent, PPPC_DEVICE_NODE child);
+PPPC_DEVICE_NODE PpcDevTreeChildNode(PPPC_DEVICE_NODE parent);
+PPPC_DEVICE_NODE PpcDevTreeParentNode(PPPC_DEVICE_NODE child);
+PPPC_DEVICE_NODE PpcDevTreeSiblingNode(PPPC_DEVICE_NODE this_entry);
+PPC_DT_BOOLEAN PpcDevTreeAddProperty
+(PPPC_DEVICE_TREE tree, int type, char *propname, char *propval, int proplen);
+PPC_DT_BOOLEAN PpcDevTreeAddDevice
+(PPPC_DEVICE_TREE tree, int type, char *name);
+PPC_DT_BOOLEAN PpcDevTreeCloseDevice(PPPC_DEVICE_TREE tree);
+PPPC_DEVICE_NODE PpcDevTreeFindDevice
+(PPPC_DEVICE_NODE root, int type, char *name);
+char *PpcDevTreeFindProperty
+(PPPC_DEVICE_NODE root, int type, char *name, int *len);
+
+#define PPC_DT_FOURCC(w,x,y,z) (((w) << 24) | ((x) << 16) | ((y) << 8) | (z))
+#define PPC_DEVICE_SERIAL_8250  PPC_DT_FOURCC('8','2','5','0')
+#define PPC_DEVICE_PCI_EAGLE    PPC_DT_FOURCC('E','g','l','e')
+#define PPC_DEVICE_ISA_BUS      PPC_DT_FOURCC('I','S','A','b')
+#define PPC_DEVICE_IDE_DISK     PPC_DT_FOURCC('I','D','E','c')
+#define PPC_DEVICE_VGA          PPC_DT_FOURCC('V','G','A','c')
+
+#define PPC_DEVICE_IO_RANGE     PPC_DT_FOURCC('I','O','r','g')
+#define PPC_DEVICE_MEM_RANGE    PPC_DT_FOURCC('M','E','M','r')
+#define PPC_DEVICE_VADDR        PPC_DT_FOURCC('v','a','d','r')
+#define PPC_DEVICE_SPACE_RANGE  PPC_DT_FOURCC('r','a','n','g')
+#define PPC_DEVICE_INTERRUPT    PPC_DT_FOURCC('I','n','t','r')
+
 #endif/*REACTOS_PPCBOOT_H*/