diff --git a/headers/private/kernel/arch/ppc/arch_cpu.h b/headers/private/kernel/arch/ppc/arch_cpu.h
index f352f38403..38b816ab81 100644
--- a/headers/private/kernel/arch/ppc/arch_cpu.h
+++ b/headers/private/kernel/arch/ppc/arch_cpu.h
@@ -59,7 +59,14 @@ struct iframe {
 	uint32 r0;
 };
 
-#define MSR_IP	(1L << 6)
+enum machine_state {
+	MSR_PRIVILEGE_LEVEL				= 1L << 14,		// PR
+	MSR_FP_AVAILABLE				= 1L << 13,		// FP
+	MSR_MACHINE_CHECK_ENABLED		= 1L << 12,		// ME
+	MSR_EXCEPTION_PREFIX			= 1L << 6,		// IP
+	MSR_INST_ADDRESS_TRANSLATION	= 1L << 5,		// IR
+	MSR_DATA_ADDRESS_TRANSLATION	= 1L << 4,		// DR
+};
 
 struct block_address_translation;
 
@@ -83,6 +90,18 @@ extern void set_dbat1(struct block_address_translation *bat);
 extern void set_dbat2(struct block_address_translation *bat);
 extern void set_dbat3(struct block_address_translation *bat);
 
+extern void get_ibat0(struct block_address_translation *bat);
+extern void get_ibat1(struct block_address_translation *bat);
+extern void get_ibat2(struct block_address_translation *bat);
+extern void get_ibat3(struct block_address_translation *bat);
+extern void get_dbat0(struct block_address_translation *bat);
+extern void get_dbat1(struct block_address_translation *bat);
+extern void get_dbat2(struct block_address_translation *bat);
+extern void get_dbat3(struct block_address_translation *bat);
+
+extern void reset_ibats(void);
+extern void reset_dbats(void);
+
 //extern void sethid0(unsigned int val);
 //extern unsigned int getl2cr(void);
 //extern void setl2cr(unsigned int val);
@@ -96,5 +115,6 @@ extern void ppc_context_switch(void **_oldStackPointer, void *newStackPointer);
 
 #define eieio()	asm volatile("eieio")
 #define isync() asm volatile("isync")
+#define tlbsync() asm volatile("tlbsync")
 
 #endif	/* _KERNEL_ARCH_PPC_CPU_H */
diff --git a/headers/private/kernel/arch/ppc/arch_mmu.h b/headers/private/kernel/arch/ppc/arch_mmu.h
index c441c5e087..5f31580cf3 100644
--- a/headers/private/kernel/arch/ppc/arch_mmu.h
+++ b/headers/private/kernel/arch/ppc/arch_mmu.h
@@ -9,6 +9,8 @@
 #include <SupportDefs.h>
 #include <string.h>
 
+#include <arch_cpu.h>
+
 
 /*** BAT - block address translation ***/
 
@@ -48,6 +50,11 @@ struct block_address_translation {
 	uint32	_reserved1 : 1;
 	uint32	protection : 2;
 
+	block_address_translation()
+	{
+		Clear();
+	}
+
 	void SetVirtualAddress(void *address)
 	{
 		page_index = uint32(address) >> 17;
@@ -71,6 +78,21 @@ struct segment_descriptor {
 	uint32	no_execute_protection : 1;
 	uint32	_reserved : 4;
 	uint32	virtual_segment_id : 24;
+
+	segment_descriptor()
+	{
+		Clear();
+	}
+
+	segment_descriptor(uint32 value)
+	{
+		*((uint32 *)this) = value;
+	}
+
+	void Clear()
+	{
+		memset((void *)this, 0, sizeof(segment_descriptor));
+	}
 };
 
 
@@ -111,4 +133,17 @@ struct page_table_entry_group {
 extern void ppc_get_page_table(page_table_entry_group **_pageTable, size_t *_size);
 extern void ppc_set_page_table(page_table_entry_group *pageTable, size_t size);
 
+static inline segment_descriptor
+ppc_get_segment_register(void *virtualAddress)
+{
+	return (segment_descriptor)get_sr(virtualAddress);
+}
+
+
+static inline void
+ppc_set_segment_register(void *virtualAddress, segment_descriptor segment)
+{
+	set_sr(virtualAddress, *(uint32 *)&segment);
+}
+
 #endif	/* _KERNEL_ARCH_PPC_MMU_H */