diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S
index 1e9949e..55cba4a 100644
--- a/arch/powerpc/kernel/cpu_setup_6xx.S
+++ b/arch/powerpc/kernel/cpu_setup_6xx.S
@@ -21,7 +21,7 @@
 	mflr	r4
 BEGIN_MMU_FTR_SECTION
 	li	r10,0
-	mtspr	SPRN_SPRG4,r10		/* init SW LRU tracking */
+	mtspr	SPRN_SPRG_603_LRU,r10		/* init SW LRU tracking */
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
 BEGIN_FTR_SECTION
 	bl	__init_fpu_registers
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 3cadba6..1175a85 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -88,7 +88,7 @@
 	mfspr	r0,SPRN_SRR1
 	stw	r0,_SRR1(r11)
 
-	mfspr	r8,SPRN_SPRG3
+	mfspr	r8,SPRN_SPRG_THREAD
 	lwz	r0,KSP_LIMIT(r8)
 	stw	r0,SAVED_KSP_LIMIT(r11)
 	rlwimi	r0,r1,0,0,(31-THREAD_SHIFT)
@@ -108,7 +108,7 @@
 	mfspr	r0,SPRN_SRR1
 	stw	r0,crit_srr1@l(0)
 
-	mfspr	r8,SPRN_SPRG3
+	mfspr	r8,SPRN_SPRG_THREAD
 	lwz	r0,KSP_LIMIT(r8)
 	stw	r0,saved_ksp_limit@l(0)
 	rlwimi	r0,r1,0,0,(31-THREAD_SHIFT)
@@ -138,7 +138,7 @@
 	mfspr	r2,SPRN_XER
 	stw	r12,_CTR(r11)
 	stw	r2,_XER(r11)
-	mfspr	r12,SPRN_SPRG3
+	mfspr	r12,SPRN_SPRG_THREAD
 	addi	r2,r12,-THREAD
 	tovirt(r2,r2)			/* set r2 to current */
 	beq	2f			/* if from user, fix up THREAD.regs */
@@ -680,7 +680,7 @@
 
 	tophys(r0,r4)
 	CLR_TOP32(r0)
-	mtspr	SPRN_SPRG3,r0	/* Update current THREAD phys addr */
+	mtspr	SPRN_SPRG_THREAD,r0	/* Update current THREAD phys addr */
 	lwz	r1,KSP(r4)	/* Load new stack pointer */
 
 	/* save the old current 'last' for return value */
@@ -1057,7 +1057,7 @@
 #ifdef CONFIG_40x
 	.globl	ret_from_crit_exc
 ret_from_crit_exc:
-	mfspr	r9,SPRN_SPRG3
+	mfspr	r9,SPRN_SPRG_THREAD
 	lis	r10,saved_ksp_limit@ha;
 	lwz	r10,saved_ksp_limit@l(r10);
 	tovirt(r9,r9);
@@ -1074,7 +1074,7 @@
 #ifdef CONFIG_BOOKE
 	.globl	ret_from_crit_exc
 ret_from_crit_exc:
-	mfspr	r9,SPRN_SPRG3
+	mfspr	r9,SPRN_SPRG_THREAD
 	lwz	r10,SAVED_KSP_LIMIT(r1)
 	stw	r10,KSP_LIMIT(r9)
 	RESTORE_xSRR(SRR0,SRR1);
@@ -1083,7 +1083,7 @@
 
 	.globl	ret_from_debug_exc
 ret_from_debug_exc:
-	mfspr	r9,SPRN_SPRG3
+	mfspr	r9,SPRN_SPRG_THREAD
 	lwz	r10,SAVED_KSP_LIMIT(r1)
 	stw	r10,KSP_LIMIT(r9)
 	lwz	r9,THREAD_INFO-THREAD(r9)
@@ -1097,7 +1097,7 @@
 
 	.globl	ret_from_mcheck_exc
 ret_from_mcheck_exc:
-	mfspr	r9,SPRN_SPRG3
+	mfspr	r9,SPRN_SPRG_THREAD
 	lwz	r10,SAVED_KSP_LIMIT(r1)
 	stw	r10,KSP_LIMIT(r9)
 	RESTORE_xSRR(SRR0,SRR1);
@@ -1255,7 +1255,7 @@
 	MTMSRD(r0)		/* don't get trashed */
 	li	r9,MSR_KERNEL & ~(MSR_IR|MSR_DR)
 	mtlr	r6
-	mtspr	SPRN_SPRG2,r7
+	mtspr	SPRN_SPRG_RTAS,r7
 	mtspr	SPRN_SRR0,r8
 	mtspr	SPRN_SRR1,r9
 	RFI
@@ -1265,7 +1265,7 @@
 	FIX_SRR1(r9,r0)
 	addi	r1,r1,INT_FRAME_SIZE
 	li	r0,0
-	mtspr	SPRN_SPRG2,r0
+	mtspr	SPRN_SPRG_RTAS,r0
 	mtspr	SPRN_SRR0,r8
 	mtspr	SPRN_SRR1,r9
 	RFI			/* return to caller */
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 43e0734..dbf0e31 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -762,7 +762,7 @@
 
 _STATIC(rtas_return_loc)
 	/* relocation is off at this point */
-	mfspr	r4,SPRN_SPRG3	        /* Get PACA */
+	mfspr	r4,SPRN_SPRG_PACA	/* Get PACA */
 	clrldi	r4,r4,2			/* convert to realmode address */
 
 	bcl	20,31,$+4
@@ -793,7 +793,7 @@
 	REST_8GPRS(14, r1)		/* Restore the non-volatiles */
 	REST_10GPRS(22, r1)		/* ditto */
 
-	mfspr	r13,SPRN_SPRG3
+	mfspr	r13,SPRN_SPRG_PACA
 
 	ld	r4,_CCR(r1)
 	mtcr	r4
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 72644cf..4e9640c 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -24,18 +24,6 @@
  * 0x8000 -        : Early init and support code
  */
 
-
-/*
- *   SPRG Usage
- *
- *   Register	Definition
- *
- *   SPRG0	reserved for hypervisor
- *   SPRG1	temp - used to save gpr
- *   SPRG2	temp - used to save gpr
- *   SPRG3	virt addr of paca
- */
-
 /*
  * This is the start of the interrupt handlers for pSeries
  * This code runs with relocation off.
@@ -53,16 +41,16 @@
 	. = 0x200
 _machine_check_pSeries:
 	HMT_MEDIUM
-	mtspr	SPRN_SPRG1,r13		/* save r13 */
+	mtspr	SPRN_SPRG_SCRATCH0,r13		/* save r13 */
 	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
 
 	. = 0x300
 	.globl data_access_pSeries
 data_access_pSeries:
 	HMT_MEDIUM
-	mtspr	SPRN_SPRG1,r13
+	mtspr	SPRN_SPRG_SCRATCH0,r13
 BEGIN_FTR_SECTION
-	mtspr	SPRN_SPRG2,r12
+	mtspr	SPRN_SPRG_SCRATCH1,r12
 	mfspr	r13,SPRN_DAR
 	mfspr	r12,SPRN_DSISR
 	srdi	r13,r13,60
@@ -71,7 +59,7 @@
 	cmpwi	r13,0x2c
 	beq	do_stab_bolted_pSeries
 	mtcrf	0x80,r12
-	mfspr	r12,SPRN_SPRG2
+	mfspr	r12,SPRN_SPRG_SCRATCH1
 END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common)
 
@@ -79,8 +67,8 @@
 	.globl data_access_slb_pSeries
 data_access_slb_pSeries:
 	HMT_MEDIUM
-	mtspr	SPRN_SPRG1,r13
-	mfspr	r13,SPRN_SPRG3		/* get paca address into r13 */
+	mtspr	SPRN_SPRG_SCRATCH0,r13
+	mfspr	r13,SPRN_SPRG_PACA		/* get paca address into r13 */
 	std	r3,PACA_EXSLB+EX_R3(r13)
 	mfspr	r3,SPRN_DAR
 	std	r9,PACA_EXSLB+EX_R9(r13)	/* save r9 - r12 */
@@ -93,7 +81,7 @@
 	std	r10,PACA_EXSLB+EX_R10(r13)
 	std	r11,PACA_EXSLB+EX_R11(r13)
 	std	r12,PACA_EXSLB+EX_R12(r13)
-	mfspr	r10,SPRN_SPRG1
+	mfspr	r10,SPRN_SPRG_SCRATCH0
 	std	r10,PACA_EXSLB+EX_R13(r13)
 	mfspr	r12,SPRN_SRR1		/* and SRR1 */
 #ifndef CONFIG_RELOCATABLE
@@ -117,8 +105,8 @@
 	.globl instruction_access_slb_pSeries
 instruction_access_slb_pSeries:
 	HMT_MEDIUM
-	mtspr	SPRN_SPRG1,r13
-	mfspr	r13,SPRN_SPRG3		/* get paca address into r13 */
+	mtspr	SPRN_SPRG_SCRATCH0,r13
+	mfspr	r13,SPRN_SPRG_PACA		/* get paca address into r13 */
 	std	r3,PACA_EXSLB+EX_R3(r13)
 	mfspr	r3,SPRN_SRR0		/* SRR0 is faulting address */
 	std	r9,PACA_EXSLB+EX_R9(r13)	/* save r9 - r12 */
@@ -131,7 +119,7 @@
 	std	r10,PACA_EXSLB+EX_R10(r13)
 	std	r11,PACA_EXSLB+EX_R11(r13)
 	std	r12,PACA_EXSLB+EX_R12(r13)
-	mfspr	r10,SPRN_SPRG1
+	mfspr	r10,SPRN_SPRG_SCRATCH0
 	std	r10,PACA_EXSLB+EX_R13(r13)
 	mfspr	r12,SPRN_SRR1		/* and SRR1 */
 #ifndef CONFIG_RELOCATABLE
@@ -161,7 +149,7 @@
 	beq-	1f
 END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
 	mr	r9,r13
-	mfspr	r13,SPRN_SPRG3
+	mfspr	r13,SPRN_SPRG_PACA
 	mfspr	r11,SPRN_SRR0
 	ld	r12,PACAKBASE(r13)
 	ld	r10,PACAKMSR(r13)
@@ -230,14 +218,14 @@
 	rotldi	r10,r10,16
 	mtspr	SPRN_SRR1,r10
 	ld	r10,PACA_EXGEN+EX_R10(r13)
-	mfspr	r13,SPRN_SPRG1
+	mfspr	r13,SPRN_SPRG_SCRATCH0
 	rfid
 	b	.
 
 	.align	7
 do_stab_bolted_pSeries:
 	mtcrf	0x80,r12
-	mfspr	r12,SPRN_SPRG2
+	mfspr	r12,SPRN_SPRG_SCRATCH1
 	EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted)
 
 #ifdef CONFIG_PPC_PSERIES
@@ -248,14 +236,14 @@
       .align 7
 system_reset_fwnmi:
 	HMT_MEDIUM
-	mtspr	SPRN_SPRG1,r13		/* save r13 */
+	mtspr	SPRN_SPRG_SCRATCH0,r13		/* save r13 */
 	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common)
 
 	.globl machine_check_fwnmi
       .align 7
 machine_check_fwnmi:
 	HMT_MEDIUM
-	mtspr	SPRN_SPRG1,r13		/* save r13 */
+	mtspr	SPRN_SPRG_SCRATCH0,r13		/* save r13 */
 	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
 
 #endif /* CONFIG_PPC_PSERIES */
@@ -270,7 +258,7 @@
 	std	r10,PACA_EXGEN+EX_R10(r13)
 	std	r11,PACA_EXGEN+EX_R11(r13)
 	std	r12,PACA_EXGEN+EX_R12(r13)
-	mfspr	r10,SPRG1
+	mfspr	r10,SPRG_SCRATCH0
 	ld	r11,PACA_EXSLB+EX_R9(r13)
 	ld	r12,PACA_EXSLB+EX_R3(r13)
 	std	r10,PACA_EXGEN+EX_R13(r13)
diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S
index 2436df3..fc8f5b1 100644
--- a/arch/powerpc/kernel/fpu.S
+++ b/arch/powerpc/kernel/fpu.S
@@ -91,7 +91,7 @@
 #endif /* CONFIG_SMP */
 	/* enable use of FP after return */
 #ifdef CONFIG_PPC32
-	mfspr	r5,SPRN_SPRG3		/* current task's THREAD (phys) */
+	mfspr	r5,SPRN_SPRG_THREAD		/* current task's THREAD (phys) */
 	lwz	r4,THREAD_FPEXC_MODE(r5)
 	ori	r9,r9,MSR_FP		/* enable FP for current */
 	or	r9,r9,r4
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index fc21329..829c3fe 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -244,8 +244,8 @@
  * task's thread_struct.
  */
 #define EXCEPTION_PROLOG	\
-	mtspr	SPRN_SPRG0,r10;	\
-	mtspr	SPRN_SPRG1,r11;	\
+	mtspr	SPRN_SPRG_SCRATCH0,r10;	\
+	mtspr	SPRN_SPRG_SCRATCH1,r11;	\
 	mfcr	r10;		\
 	EXCEPTION_PROLOG_1;	\
 	EXCEPTION_PROLOG_2
@@ -255,7 +255,7 @@
 	andi.	r11,r11,MSR_PR;	\
 	tophys(r11,r1);			/* use tophys(r1) if kernel */ \
 	beq	1f;		\
-	mfspr	r11,SPRN_SPRG3;	\
+	mfspr	r11,SPRN_SPRG_THREAD;	\
 	lwz	r11,THREAD_INFO-THREAD(r11);	\
 	addi	r11,r11,THREAD_SIZE;	\
 	tophys(r11,r11);	\
@@ -267,9 +267,9 @@
 	stw	r10,_CCR(r11);		/* save registers */ \
 	stw	r12,GPR12(r11);	\
 	stw	r9,GPR9(r11);	\
-	mfspr	r10,SPRN_SPRG0;	\
+	mfspr	r10,SPRN_SPRG_SCRATCH0;	\
 	stw	r10,GPR10(r11);	\
-	mfspr	r12,SPRN_SPRG1;	\
+	mfspr	r12,SPRN_SPRG_SCRATCH1;	\
 	stw	r12,GPR11(r11);	\
 	mflr	r10;		\
 	stw	r10,_LINK(r11);	\
@@ -355,11 +355,11 @@
  *	-- paulus.
  */
 	. = 0x200
-	mtspr	SPRN_SPRG0,r10
-	mtspr	SPRN_SPRG1,r11
+	mtspr	SPRN_SPRG_SCRATCH0,r10
+	mtspr	SPRN_SPRG_SCRATCH1,r11
 	mfcr	r10
 #ifdef CONFIG_PPC_CHRP
-	mfspr	r11,SPRN_SPRG2
+	mfspr	r11,SPRN_SPRG_RTAS
 	cmpwi	0,r11,0
 	bne	7f
 #endif /* CONFIG_PPC_CHRP */
@@ -367,7 +367,7 @@
 7:	EXCEPTION_PROLOG_2
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 #ifdef CONFIG_PPC_CHRP
-	mfspr	r4,SPRN_SPRG2
+	mfspr	r4,SPRN_SPRG_RTAS
 	cmpwi	cr1,r4,0
 	bne	cr1,1f
 #endif
@@ -485,7 +485,7 @@
 	mfspr	r3,SPRN_IMISS
 	lis	r1,PAGE_OFFSET@h		/* check if kernel address */
 	cmplw	0,r1,r3
-	mfspr	r2,SPRN_SPRG3
+	mfspr	r2,SPRN_SPRG_THREAD
 	li	r1,_PAGE_USER|_PAGE_PRESENT /* low addresses tested as user */
 	lwz	r2,PGDIR(r2)
 	bge-	112f
@@ -559,7 +559,7 @@
 	mfspr	r3,SPRN_DMISS
 	lis	r1,PAGE_OFFSET@h		/* check if kernel address */
 	cmplw	0,r1,r3
-	mfspr	r2,SPRN_SPRG3
+	mfspr	r2,SPRN_SPRG_THREAD
 	li	r1,_PAGE_USER|_PAGE_PRESENT /* low addresses tested as user */
 	lwz	r2,PGDIR(r2)
 	bge-	112f
@@ -598,12 +598,12 @@
 	mtcrf	0x80,r2
 BEGIN_MMU_FTR_SECTION
 	li	r0,1
-	mfspr	r1,SPRN_SPRG4
+	mfspr	r1,SPRN_SPRG_603_LRU
 	rlwinm	r2,r3,20,27,31		/* Get Address bits 15:19 */
 	slw	r0,r0,r2
 	xor	r1,r0,r1
 	srw	r0,r1,r2
-	mtspr   SPRN_SPRG4,r1
+	mtspr   SPRN_SPRG_603_LRU,r1
 	mfspr	r2,SPRN_SRR1
 	rlwimi	r2,r0,31-14,14,14
 	mtspr   SPRN_SRR1,r2
@@ -643,7 +643,7 @@
 	mfspr	r3,SPRN_DMISS
 	lis	r1,PAGE_OFFSET@h		/* check if kernel address */
 	cmplw	0,r1,r3
-	mfspr	r2,SPRN_SPRG3
+	mfspr	r2,SPRN_SPRG_THREAD
 	li	r1,_PAGE_RW|_PAGE_USER|_PAGE_PRESENT /* access flags */
 	lwz	r2,PGDIR(r2)
 	bge-	112f
@@ -678,12 +678,12 @@
 	mtcrf	0x80,r2
 BEGIN_MMU_FTR_SECTION
 	li	r0,1
-	mfspr	r1,SPRN_SPRG4
+	mfspr	r1,SPRN_SPRG_603_LRU
 	rlwinm	r2,r3,20,27,31		/* Get Address bits 15:19 */
 	slw	r0,r0,r2
 	xor	r1,r0,r1
 	srw	r0,r1,r2
-	mtspr   SPRN_SPRG4,r1
+	mtspr   SPRN_SPRG_603_LRU,r1
 	mfspr	r2,SPRN_SRR1
 	rlwimi	r2,r0,31-14,14,14
 	mtspr   SPRN_SRR1,r2
@@ -864,9 +864,9 @@
 	tophys(r4,r2)
 	addi	r4,r4,THREAD	/* phys address of our thread_struct */
 	CLR_TOP32(r4)
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 	li	r3,0
-	mtspr	SPRN_SPRG2,r3	/* 0 => not in RTAS */
+	mtspr	SPRN_SPRG_RTAS,r3	/* 0 => not in RTAS */
 
 	/* enable MMU and jump to start_secondary */
 	li	r4,MSR_KERNEL
@@ -947,9 +947,9 @@
 	tophys(r4,r2)
 	addi	r4,r4,THREAD	/* init task's THREAD */
 	CLR_TOP32(r4)
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 	li	r3,0
-	mtspr	SPRN_SPRG2,r3	/* 0 => not in RTAS */
+	mtspr	SPRN_SPRG_RTAS,r3	/* 0 => not in RTAS */
 
 	/* stack */
 	lis	r1,init_thread_union@ha
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 0c96911..a90625f 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -103,21 +103,21 @@
 
 /*
  * Exception vector entry code. This code runs with address translation
- * turned off (i.e. using physical addresses). We assume SPRG3 has the
- * physical address of the current task thread_struct.
+ * turned off (i.e. using physical addresses). We assume SPRG_THREAD has
+ * the physical address of the current task thread_struct.
  * Note that we have to have decremented r1 before we write to any fields
  * of the exception frame, since a critical interrupt could occur at any
  * time, and it will write to the area immediately below the current r1.
  */
 #define NORMAL_EXCEPTION_PROLOG						     \
-	mtspr	SPRN_SPRG0,r10;		/* save two registers to work with */\
-	mtspr	SPRN_SPRG1,r11;						     \
-	mtspr	SPRN_SPRG2,r1;						     \
+	mtspr	SPRN_SPRG_SCRATCH0,r10;	/* save two registers to work with */\
+	mtspr	SPRN_SPRG_SCRATCH1,r11;					     \
+	mtspr	SPRN_SPRG_SCRATCH2,r1;					     \
 	mfcr	r10;			/* save CR in r10 for now	   */\
 	mfspr	r11,SPRN_SRR1;		/* check whether user or kernel    */\
 	andi.	r11,r11,MSR_PR;						     \
 	beq	1f;							     \
-	mfspr	r1,SPRN_SPRG3;		/* if from user, start at top of   */\
+	mfspr	r1,SPRN_SPRG_THREAD;	/* if from user, start at top of   */\
 	lwz	r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack   */\
 	addi	r1,r1,THREAD_SIZE;					     \
 1:	subi	r1,r1,INT_FRAME_SIZE;	/* Allocate an exception frame     */\
@@ -125,13 +125,13 @@
 	stw	r10,_CCR(r11);          /* save various registers	   */\
 	stw	r12,GPR12(r11);						     \
 	stw	r9,GPR9(r11);						     \
-	mfspr	r10,SPRN_SPRG0;						     \
+	mfspr	r10,SPRN_SPRG_SCRATCH0;					     \
 	stw	r10,GPR10(r11);						     \
-	mfspr	r12,SPRN_SPRG1;						     \
+	mfspr	r12,SPRN_SPRG_SCRATCH1;					     \
 	stw	r12,GPR11(r11);						     \
 	mflr	r10;							     \
 	stw	r10,_LINK(r11);						     \
-	mfspr	r10,SPRN_SPRG2;						     \
+	mfspr	r10,SPRN_SPRG_SCRATCH2;					     \
 	mfspr	r12,SPRN_SRR0;						     \
 	stw	r10,GPR1(r11);						     \
 	mfspr	r9,SPRN_SRR1;						     \
@@ -160,7 +160,7 @@
 	lwz	r11,critirq_ctx@l(r11);					     \
 	beq	1f;							     \
 	/* COMING FROM USER MODE */					     \
-	mfspr	r11,SPRN_SPRG3;		/* if from user, start at top of   */\
+	mfspr	r11,SPRN_SPRG_THREAD;	/* if from user, start at top of   */\
 	lwz	r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
 1:	addi	r11,r11,THREAD_SIZE-INT_FRAME_SIZE; /* Alloc an excpt frm  */\
 	tophys(r11,r11);						     \
@@ -265,8 +265,8 @@
  * and exit.  Otherwise, we call heavywight functions to do the work.
  */
 	START_EXCEPTION(0x0300,	DataStorage)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
+	mtspr	SPRN_SPRG_SCRATCH0, r10 /* Save some working registers */
+	mtspr	SPRN_SPRG_SCRATCH1, r11
 #ifdef CONFIG_403GCX
 	stw     r12, 0(r0)
 	stw     r9, 4(r0)
@@ -275,12 +275,12 @@
 	stw     r11, 8(r0)
 	stw     r12, 12(r0)
 #else
-	mtspr	SPRN_SPRG4, r12
-	mtspr	SPRN_SPRG5, r9
+	mtspr	SPRN_SPRG_SCRATCH3, r12
+	mtspr	SPRN_SPRG_SCRATCH4, r9
 	mfcr	r11
 	mfspr	r12, SPRN_PID
-	mtspr	SPRN_SPRG7, r11
-	mtspr	SPRN_SPRG6, r12
+	mtspr	SPRN_SPRG_SCRATCH6, r11
+	mtspr	SPRN_SPRG_SCRATCH5, r12
 #endif
 
 	/* First, check if it was a zone fault (which means a user
@@ -308,7 +308,7 @@
 	/* Get the PGD for the current thread.
 	 */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 4:
 	tophys(r11, r11)
@@ -355,15 +355,15 @@
 	lwz     r9, 4(r0)
 	lwz     r12, 0(r0)
 #else
-	mfspr	r12, SPRN_SPRG6
-	mfspr	r11, SPRN_SPRG7
+	mfspr	r12, SPRN_SPRG_SCRATCH5
+	mfspr	r11, SPRN_SPRG_SCRATCH6
 	mtspr	SPRN_PID, r12
 	mtcr	r11
-	mfspr	r9, SPRN_SPRG5
-	mfspr	r12, SPRN_SPRG4
+	mfspr	r9, SPRN_SPRG_SCRATCH4
+	mfspr	r12, SPRN_SPRG_SCRATCH3
 #endif
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r11, SPRN_SPRG_SCRATCH1
+	mfspr	r10, SPRN_SPRG_SCRATCH0
 	PPC405_ERR77_SYNC
 	rfi			/* Should sync shadow TLBs */
 	b	.		/* prevent prefetch past rfi */
@@ -380,15 +380,15 @@
 	lwz     r9, 4(r0)
 	lwz     r12, 0(r0)
 #else
-	mfspr	r12, SPRN_SPRG6
-	mfspr	r11, SPRN_SPRG7
+	mfspr	r12, SPRN_SPRG_SCRATCH5
+	mfspr	r11, SPRN_SPRG_SCRATCH6
 	mtspr	SPRN_PID, r12
 	mtcr	r11
-	mfspr	r9, SPRN_SPRG5
-	mfspr	r12, SPRN_SPRG4
+	mfspr	r9, SPRN_SPRG_SCRATCH4
+	mfspr	r12, SPRN_SPRG_SCRATCH3
 #endif
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r11, SPRN_SPRG_SCRATCH1
+	mfspr	r10, SPRN_SPRG_SCRATCH0
 	b	DataAccess
 
 /*
@@ -466,8 +466,8 @@
  * load TLB entries from the page table if they exist.
  */
 	START_EXCEPTION(0x1100,	DTLBMiss)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
+	mtspr	SPRN_SPRG_SCRATCH0, r10 /* Save some working registers */
+	mtspr	SPRN_SPRG_SCRATCH1, r11
 #ifdef CONFIG_403GCX
 	stw     r12, 0(r0)
 	stw     r9, 4(r0)
@@ -476,12 +476,12 @@
 	stw     r11, 8(r0)
 	stw     r12, 12(r0)
 #else
-	mtspr	SPRN_SPRG4, r12
-	mtspr	SPRN_SPRG5, r9
+	mtspr	SPRN_SPRG_SCRATCH3, r12
+	mtspr	SPRN_SPRG_SCRATCH4, r9
 	mfcr	r11
 	mfspr	r12, SPRN_PID
-	mtspr	SPRN_SPRG7, r11
-	mtspr	SPRN_SPRG6, r12
+	mtspr	SPRN_SPRG_SCRATCH6, r11
+	mtspr	SPRN_SPRG_SCRATCH5, r12
 #endif
 	mfspr	r10, SPRN_DEAR		/* Get faulting address */
 
@@ -500,7 +500,7 @@
 	/* Get the PGD for the current thread.
 	 */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 4:
 	tophys(r11, r11)
@@ -550,15 +550,15 @@
 	lwz     r9, 4(r0)
 	lwz     r12, 0(r0)
 #else
-	mfspr	r12, SPRN_SPRG6
-	mfspr	r11, SPRN_SPRG7
+	mfspr	r12, SPRN_SPRG_SCRATCH5
+	mfspr	r11, SPRN_SPRG_SCRATCH6
 	mtspr	SPRN_PID, r12
 	mtcr	r11
-	mfspr	r9, SPRN_SPRG5
-	mfspr	r12, SPRN_SPRG4
+	mfspr	r9, SPRN_SPRG_SCRATCH4
+	mfspr	r12, SPRN_SPRG_SCRATCH3
 #endif
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r11, SPRN_SPRG_SCRATCH1
+	mfspr	r10, SPRN_SPRG_SCRATCH0
 	b	DataAccess
 
 /* 0x1200 - Instruction TLB Miss Exception
@@ -566,8 +566,8 @@
  * registers and bailout to a different point.
  */
 	START_EXCEPTION(0x1200,	ITLBMiss)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
+	mtspr	SPRN_SPRG_SCRATCH0, r10	 /* Save some working registers */
+	mtspr	SPRN_SPRG_SCRATCH1, r11
 #ifdef CONFIG_403GCX
 	stw     r12, 0(r0)
 	stw     r9, 4(r0)
@@ -576,12 +576,12 @@
 	stw     r11, 8(r0)
 	stw     r12, 12(r0)
 #else
-	mtspr	SPRN_SPRG4, r12
-	mtspr	SPRN_SPRG5, r9
+	mtspr	SPRN_SPRG_SCRATCH3, r12
+	mtspr	SPRN_SPRG_SCRATCH4, r9
 	mfcr	r11
 	mfspr	r12, SPRN_PID
-	mtspr	SPRN_SPRG7, r11
-	mtspr	SPRN_SPRG6, r12
+	mtspr	SPRN_SPRG_SCRATCH6, r11
+	mtspr	SPRN_SPRG_SCRATCH5, r12
 #endif
 	mfspr	r10, SPRN_SRR0		/* Get faulting address */
 
@@ -600,7 +600,7 @@
 	/* Get the PGD for the current thread.
 	 */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 4:
 	tophys(r11, r11)
@@ -650,15 +650,15 @@
 	lwz     r9, 4(r0)
 	lwz     r12, 0(r0)
 #else
-	mfspr	r12, SPRN_SPRG6
-	mfspr	r11, SPRN_SPRG7
+	mfspr	r12, SPRN_SPRG_SCRATCH5
+	mfspr	r11, SPRN_SPRG_SCRATCH6
 	mtspr	SPRN_PID, r12
 	mtcr	r11
-	mfspr	r9, SPRN_SPRG5
-	mfspr	r12, SPRN_SPRG4
+	mfspr	r9, SPRN_SPRG_SCRATCH4
+	mfspr	r12, SPRN_SPRG_SCRATCH3
 #endif
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r11, SPRN_SPRG_SCRATCH1
+	mfspr	r10, SPRN_SPRG_SCRATCH0
 	b	InstructionAccess
 
 	EXCEPTION(0x1300, Trap_13, unknown_exception, EXC_XFER_EE)
@@ -803,15 +803,15 @@
 	lwz     r9, 4(r0)
 	lwz     r12, 0(r0)
 #else
-	mfspr	r12, SPRN_SPRG6
-	mfspr	r11, SPRN_SPRG7
+	mfspr	r12, SPRN_SPRG_SCRATCH5
+	mfspr	r11, SPRN_SPRG_SCRATCH6
 	mtspr	SPRN_PID, r12
 	mtcr	r11
-	mfspr	r9, SPRN_SPRG5
-	mfspr	r12, SPRN_SPRG4
+	mfspr	r9, SPRN_SPRG_SCRATCH4
+	mfspr	r12, SPRN_SPRG_SCRATCH3
 #endif
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r11, SPRN_SPRG_SCRATCH1
+	mfspr	r10, SPRN_SPRG_SCRATCH0
 	PPC405_ERR77_SYNC
 	rfi			/* Should sync shadow TLBs */
 	b	.		/* prevent prefetch past rfi */
@@ -835,7 +835,7 @@
 	/* ptr to phys current thread */
 	tophys(r4,r2)
 	addi	r4,r4,THREAD	/* init task's THREAD */
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 
 	/* stack */
 	lis	r1,init_thread_union@ha
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 18d8a16..656cfb2 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -239,7 +239,7 @@
 
 	/* ptr to current thread */
 	addi	r4,r2,THREAD	/* init task's THREAD */
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 
 	/* stack */
 	lis	r1,init_thread_union@h
@@ -350,12 +350,12 @@
 
 	/* Data TLB Error Interrupt */
 	START_EXCEPTION(DataTLBError)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
-	mtspr	SPRN_SPRG4W, r12
-	mtspr	SPRN_SPRG5W, r13
+	mtspr	SPRN_SPRG_WSCRATCH0, r10		/* Save some working registers */
+	mtspr	SPRN_SPRG_WSCRATCH1, r11
+	mtspr	SPRN_SPRG_WSCRATCH2, r12
+	mtspr	SPRN_SPRG_WSCRATCH3, r13
 	mfcr	r11
-	mtspr	SPRN_SPRG7W, r11
+	mtspr	SPRN_SPRG_WSCRATCH4, r11
 	mfspr	r10, SPRN_DEAR		/* Get faulting address */
 
 	/* If we are faulting a kernel address, we have to use the
@@ -374,7 +374,7 @@
 
 	/* Get the PGD for the current thread */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 
 	/* Load PID into MMUCR TID */
@@ -446,12 +446,12 @@
 	/* The bailout.  Restore registers to pre-exception conditions
 	 * and call the heavyweights to help us out.
 	 */
-	mfspr	r11, SPRN_SPRG7R
+	mfspr	r11, SPRN_SPRG_RSCRATCH4
 	mtcr	r11
-	mfspr	r13, SPRN_SPRG5R
-	mfspr	r12, SPRN_SPRG4R
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r13, SPRN_SPRG_RSCRATCH3
+	mfspr	r12, SPRN_SPRG_RSCRATCH2
+	mfspr	r11, SPRN_SPRG_RSCRATCH1
+	mfspr	r10, SPRN_SPRG_RSCRATCH0
 	b	DataStorage
 
 	/* Instruction TLB Error Interrupt */
@@ -461,12 +461,12 @@
 	 * to a different point.
 	 */
 	START_EXCEPTION(InstructionTLBError)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
-	mtspr	SPRN_SPRG4W, r12
-	mtspr	SPRN_SPRG5W, r13
+	mtspr	SPRN_SPRG_WSCRATCH0, r10 /* Save some working registers */
+	mtspr	SPRN_SPRG_WSCRATCH1, r11
+	mtspr	SPRN_SPRG_WSCRATCH2, r12
+	mtspr	SPRN_SPRG_WSCRATCH3, r13
 	mfcr	r11
-	mtspr	SPRN_SPRG7W, r11
+	mtspr	SPRN_SPRG_WSCRATCH4, r11
 	mfspr	r10, SPRN_SRR0		/* Get faulting address */
 
 	/* If we are faulting a kernel address, we have to use the
@@ -485,7 +485,7 @@
 
 	/* Get the PGD for the current thread */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 
 	/* Load PID into MMUCR TID */
@@ -542,12 +542,12 @@
 	/* The bailout.  Restore registers to pre-exception conditions
 	 * and call the heavyweights to help us out.
 	 */
-	mfspr	r11, SPRN_SPRG7R
+	mfspr	r11, SPRN_SPRG_RSCRATCH4
 	mtcr	r11
-	mfspr	r13, SPRN_SPRG5R
-	mfspr	r12, SPRN_SPRG4R
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r13, SPRN_SPRG_RSCRATCH3
+	mfspr	r12, SPRN_SPRG_RSCRATCH2
+	mfspr	r11, SPRN_SPRG_RSCRATCH1
+	mfspr	r10, SPRN_SPRG_RSCRATCH0
 	b	InstructionStorage
 
 	/* Debug Interrupt */
@@ -593,12 +593,12 @@
 
 	/* Done...restore registers and get out of here.
 	*/
-	mfspr	r11, SPRN_SPRG7R
+	mfspr	r11, SPRN_SPRG_RSCRATCH4
 	mtcr	r11
-	mfspr	r13, SPRN_SPRG5R
-	mfspr	r12, SPRN_SPRG4R
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r13, SPRN_SPRG_RSCRATCH3
+	mfspr	r12, SPRN_SPRG_RSCRATCH2
+	mfspr	r11, SPRN_SPRG_RSCRATCH1
+	mfspr	r10, SPRN_SPRG_RSCRATCH0
 	rfi					/* Force context change */
 
 /*
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 9196ef3..0552f01 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -195,7 +195,7 @@
 	mr	r3,r24			/* not found, copy phys to r3	 */
 	b	.kexec_wait		/* next kernel might do better	 */
 
-2:	mtspr	SPRN_SPRG3,r13		/* Save vaddr of paca in SPRG3	 */
+2:	mtspr	SPRN_SPRG_PACA,r13	/* Save vaddr of paca in an SPRG */
 	/* From now on, r24 is expected to be logical cpuid */
 	mr	r24,r5
 3:	HMT_LOW
@@ -484,7 +484,7 @@
 	LOAD_REG_ADDR(r4,paca)		/* Get base vaddr of paca array	*/
 	mulli	r13,r24,PACA_SIZE	/* Calculate vaddr of right paca */
 	add	r13,r13,r4		/* for this processor.		*/
-	mtspr	SPRN_SPRG3,r13		/* Save vaddr of paca in SPRG3	*/
+	mtspr	SPRN_SPRG_PACA,r13	/* Save vaddr of paca in an SPRG*/
 
 	/* Create a temp kernel stack for use before relocation is on.	*/
 	ld	r1,PACAEMERGSP(r13)
@@ -502,10 +502,10 @@
  *   1. Processor number
  *   2. Segment table pointer (virtual address)
  * On entry the following are set:
- *   r1	= stack pointer.  vaddr for iSeries, raddr (temp stack) for pSeries
- *   r24   = cpu# (in Linux terms)
- *   r13   = paca virtual address
- *   SPRG3 = paca virtual address
+ *   r1	       = stack pointer.  vaddr for iSeries, raddr (temp stack) for pSeries
+ *   r24       = cpu# (in Linux terms)
+ *   r13       = paca virtual address
+ *   SPRG_PACA = paca virtual address
  */
 	.globl	__secondary_start
 __secondary_start:
@@ -641,7 +641,7 @@
 
 	/* Restore parameters passed from prom_init/kexec */
 	mr	r3,r31
-	bl	.early_setup		/* also sets r13 and SPRG3 */
+	bl	.early_setup		/* also sets r13 and SPRG_PACA */
 
 	LOAD_REG_ADDR(r3, .start_here_common)
 	ld	r4,PACAKMSR(r13)
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 52ff8c5..6ded19d 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -110,8 +110,8 @@
  * task's thread_struct.
  */
 #define EXCEPTION_PROLOG	\
-	mtspr	SPRN_SPRG0,r10;	\
-	mtspr	SPRN_SPRG1,r11;	\
+	mtspr	SPRN_SPRG_SCRATCH0,r10;	\
+	mtspr	SPRN_SPRG_SCRATCH1,r11;	\
 	mfcr	r10;		\
 	EXCEPTION_PROLOG_1;	\
 	EXCEPTION_PROLOG_2
@@ -121,7 +121,7 @@
 	andi.	r11,r11,MSR_PR;	\
 	tophys(r11,r1);			/* use tophys(r1) if kernel */ \
 	beq	1f;		\
-	mfspr	r11,SPRN_SPRG3;	\
+	mfspr	r11,SPRN_SPRG_THREAD;	\
 	lwz	r11,THREAD_INFO-THREAD(r11);	\
 	addi	r11,r11,THREAD_SIZE;	\
 	tophys(r11,r11);	\
@@ -133,9 +133,9 @@
 	stw	r10,_CCR(r11);		/* save registers */ \
 	stw	r12,GPR12(r11);	\
 	stw	r9,GPR9(r11);	\
-	mfspr	r10,SPRN_SPRG0;	\
+	mfspr	r10,SPRN_SPRG_SCRATCH0;	\
 	stw	r10,GPR10(r11);	\
-	mfspr	r12,SPRN_SPRG1;	\
+	mfspr	r12,SPRN_SPRG_SCRATCH1;	\
 	stw	r12,GPR11(r11);	\
 	mflr	r10;		\
 	stw	r10,_LINK(r11);	\
@@ -603,8 +603,9 @@
 	/* ptr to phys current thread */
 	tophys(r4,r2)
 	addi	r4,r4,THREAD	/* init task's THREAD */
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 	li	r3,0
+	/* XXX What is that for ? SPRG2 appears otherwise unused on 8xx */
 	mtspr	SPRN_SPRG2,r3	/* 0 => r1 has kernel sp */
 
 	/* stack */
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 5f9febc..50504ae 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -20,14 +20,14 @@
 #endif
 
 #define NORMAL_EXCEPTION_PROLOG						     \
-	mtspr	SPRN_SPRG0,r10;		/* save two registers to work with */\
-	mtspr	SPRN_SPRG1,r11;						     \
-	mtspr	SPRN_SPRG4W,r1;						     \
+	mtspr	SPRN_SPRG_WSCRATCH0,r10;/* save two registers to work with */\
+	mtspr	SPRN_SPRG_WSCRATCH1,r11;				     \
+	mtspr	SPRN_SPRG_WSCRATCH2,r1;					     \
 	mfcr	r10;			/* save CR in r10 for now	   */\
 	mfspr	r11,SPRN_SRR1;		/* check whether user or kernel    */\
 	andi.	r11,r11,MSR_PR;						     \
 	beq	1f;							     \
-	mfspr	r1,SPRN_SPRG3;		/* if from user, start at top of   */\
+	mfspr	r1,SPRN_SPRG_THREAD;	/* if from user, start at top of   */\
 	lwz	r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack   */\
 	ALLOC_STACK_FRAME(r1, THREAD_SIZE);				     \
 1:	subi	r1,r1,INT_FRAME_SIZE;	/* Allocate an exception frame     */\
@@ -35,13 +35,13 @@
 	stw	r10,_CCR(r11);          /* save various registers	   */\
 	stw	r12,GPR12(r11);						     \
 	stw	r9,GPR9(r11);						     \
-	mfspr	r10,SPRN_SPRG0;						     \
+	mfspr	r10,SPRN_SPRG_RSCRATCH0;					\
 	stw	r10,GPR10(r11);						     \
-	mfspr	r12,SPRN_SPRG1;						     \
+	mfspr	r12,SPRN_SPRG_RSCRATCH1;				     \
 	stw	r12,GPR11(r11);						     \
 	mflr	r10;							     \
 	stw	r10,_LINK(r11);						     \
-	mfspr	r10,SPRN_SPRG4R;					     \
+	mfspr	r10,SPRN_SPRG_RSCRATCH2;				     \
 	mfspr	r12,SPRN_SRR0;						     \
 	stw	r10,GPR1(r11);						     \
 	mfspr	r9,SPRN_SRR1;						     \
@@ -69,21 +69,11 @@
  * providing configurations that micro-optimize space usage.
  */
 
-/* CRIT_SPRG only used in critical exception handling */
-#define CRIT_SPRG	SPRN_SPRG2
-/* MCHECK_SPRG only used in machine check exception handling */
-#define MCHECK_SPRG	SPRN_SPRG6W
-
-#define MCHECK_STACK_BASE	mcheckirq_ctx
+#define MC_STACK_BASE		mcheckirq_ctx
 #define CRIT_STACK_BASE		critirq_ctx
 
 /* only on e500mc/e200 */
-#define DEBUG_STACK_BASE	dbgirq_ctx
-#ifdef CONFIG_E200
-#define DEBUG_SPRG		SPRN_SPRG6W
-#else
-#define DEBUG_SPRG		SPRN_SPRG9
-#endif
+#define DBG_STACK_BASE		dbgirq_ctx
 
 #define EXC_LVL_FRAME_OVERHEAD	(THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
 
@@ -110,7 +100,7 @@
  * critical/machine check exception stack at low physical addresses.
  */
 #define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, exc_level_srr0, exc_level_srr1) \
-	mtspr	exc_level##_SPRG,r8;					     \
+	mtspr	SPRN_SPRG_WSCRATCH_##exc_level,r8;			     \
 	BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \
 	stw	r9,GPR9(r8);		/* save various registers	   */\
 	mfcr	r9;			/* save CR in r9 for now	   */\
@@ -119,7 +109,7 @@
 	stw	r9,_CCR(r8);		/* save CR on stack		   */\
 	mfspr	r10,exc_level_srr1;	/* check whether user or kernel    */\
 	andi.	r10,r10,MSR_PR;						     \
-	mfspr	r11,SPRN_SPRG3;		/* if from user, start at top of   */\
+	mfspr	r11,SPRN_SPRG_THREAD;	/* if from user, start at top of   */\
 	lwz	r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
 	addi	r11,r11,EXC_LVL_FRAME_OVERHEAD;	/* allocate stack frame    */\
 	beq	1f;							     \
@@ -140,7 +130,7 @@
 	lwz	r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r11);			     \
 	stw	r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r8);			     \
 	mr	r11,r8;							     \
-2:	mfspr	r8,exc_level##_SPRG;					     \
+2:	mfspr	r8,SPRN_SPRG_RSCRATCH_##exc_level;			     \
 	stw	r12,GPR12(r11);		/* save various registers	   */\
 	mflr	r10;							     \
 	stw	r10,_LINK(r11);						     \
@@ -161,9 +151,9 @@
 #define CRITICAL_EXCEPTION_PROLOG \
 		EXC_LEVEL_EXCEPTION_PROLOG(CRIT, SPRN_CSRR0, SPRN_CSRR1)
 #define DEBUG_EXCEPTION_PROLOG \
-		EXC_LEVEL_EXCEPTION_PROLOG(DEBUG, SPRN_DSRR0, SPRN_DSRR1)
+		EXC_LEVEL_EXCEPTION_PROLOG(DBG, SPRN_DSRR0, SPRN_DSRR1)
 #define MCHECK_EXCEPTION_PROLOG \
-		EXC_LEVEL_EXCEPTION_PROLOG(MCHECK, SPRN_MCSRR0, SPRN_MCSRR1)
+		EXC_LEVEL_EXCEPTION_PROLOG(MC, SPRN_MCSRR0, SPRN_MCSRR1)
 
 /*
  * Exception vectors.
@@ -282,13 +272,13 @@
 	mtspr	SPRN_DSRR1,r9;						      \
 	lwz	r9,GPR9(r11);						      \
 	lwz	r12,GPR12(r11);						      \
-	mtspr	DEBUG_SPRG,r8;						      \
-	BOOKE_LOAD_EXC_LEVEL_STACK(DEBUG); /* r8 points to the debug stack */ \
+	mtspr	SPRN_SPRG_WSCRATCH_DBG,r8;				      \
+	BOOKE_LOAD_EXC_LEVEL_STACK(DBG); /* r8 points to the debug stack */ \
 	lwz	r10,GPR10(r8);						      \
 	lwz	r11,GPR11(r8);						      \
-	mfspr	r8,DEBUG_SPRG;						      \
+	mfspr	r8,SPRN_SPRG_RSCRATCH_DBG;				      \
 									      \
-	PPC_RFDI;								      \
+	PPC_RFDI;							      \
 	b	.;							      \
 									      \
 	/* continue normal handling for a debug exception... */		      \
@@ -335,11 +325,11 @@
 	mtspr	SPRN_CSRR1,r9;						      \
 	lwz	r9,GPR9(r11);						      \
 	lwz	r12,GPR12(r11);						      \
-	mtspr	CRIT_SPRG,r8;						      \
+	mtspr	SPRN_SPRG_WSCRATCH_CRIT,r8;				      \
 	BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */  \
 	lwz	r10,GPR10(r8);						      \
 	lwz	r11,GPR11(r8);						      \
-	mfspr	r8,CRIT_SPRG;						      \
+	mfspr	r8,SPRN_SPRG_RSCRATCH_CRIT;				      \
 									      \
 	rfci;								      \
 	b	.;							      \
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 5bdcc06..eca8048 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -361,7 +361,7 @@
 
 	/* ptr to current thread */
 	addi	r4,r2,THREAD	/* init task's THREAD */
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 
 	/* stack */
 	lis	r1,init_thread_union@h
@@ -532,12 +532,12 @@
 
 	/* Data TLB Error Interrupt */
 	START_EXCEPTION(DataTLBError)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
-	mtspr	SPRN_SPRG4W, r12
-	mtspr	SPRN_SPRG5W, r13
+	mtspr	SPRN_SPRG_WSCRATCH0, r10 /* Save some working registers */
+	mtspr	SPRN_SPRG_WSCRATCH1, r11
+	mtspr	SPRN_SPRG_WSCRATCH2, r12
+	mtspr	SPRN_SPRG_WSCRATCH3, r13
 	mfcr	r11
-	mtspr	SPRN_SPRG7W, r11
+	mtspr	SPRN_SPRG_WSCRATCH4, r11
 	mfspr	r10, SPRN_DEAR		/* Get faulting address */
 
 	/* If we are faulting a kernel address, we have to use the
@@ -557,7 +557,7 @@
 
 	/* Get the PGD for the current thread */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 
 4:
@@ -598,12 +598,12 @@
 	/* The bailout.  Restore registers to pre-exception conditions
 	 * and call the heavyweights to help us out.
 	 */
-	mfspr	r11, SPRN_SPRG7R
+	mfspr	r11, SPRN_SPRG_RSCRATCH4
 	mtcr	r11
-	mfspr	r13, SPRN_SPRG5R
-	mfspr	r12, SPRN_SPRG4R
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r13, SPRN_SPRG_RSCRATCH3
+	mfspr	r12, SPRN_SPRG_RSCRATCH2
+	mfspr	r11, SPRN_SPRG_RSCRATCH1
+	mfspr	r10, SPRN_SPRG_RSCRATCH0
 	b	DataStorage
 
 	/* Instruction TLB Error Interrupt */
@@ -613,12 +613,12 @@
 	 * to a different point.
 	 */
 	START_EXCEPTION(InstructionTLBError)
-	mtspr	SPRN_SPRG0, r10		/* Save some working registers */
-	mtspr	SPRN_SPRG1, r11
-	mtspr	SPRN_SPRG4W, r12
-	mtspr	SPRN_SPRG5W, r13
+	mtspr	SPRN_SPRG_WSCRATCH0, r10 /* Save some working registers */
+	mtspr	SPRN_SPRG_WSCRATCH1, r11
+	mtspr	SPRN_SPRG_WSCRATCH2, r12
+	mtspr	SPRN_SPRG_WSCRATCH3, r13
 	mfcr	r11
-	mtspr	SPRN_SPRG7W, r11
+	mtspr	SPRN_SPRG_WSCRATCH4, r11
 	mfspr	r10, SPRN_SRR0		/* Get faulting address */
 
 	/* If we are faulting a kernel address, we have to use the
@@ -638,7 +638,7 @@
 
 	/* Get the PGD for the current thread */
 3:
-	mfspr	r11,SPRN_SPRG3
+	mfspr	r11,SPRN_SPRG_THREAD
 	lwz	r11,PGDIR(r11)
 
 4:
@@ -666,12 +666,12 @@
 	/* The bailout.  Restore registers to pre-exception conditions
 	 * and call the heavyweights to help us out.
 	 */
-	mfspr	r11, SPRN_SPRG7R
+	mfspr	r11, SPRN_SPRG_RSCRATCH4
 	mtcr	r11
-	mfspr	r13, SPRN_SPRG5R
-	mfspr	r12, SPRN_SPRG4R
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r13, SPRN_SPRG_RSCRATCH3
+	mfspr	r12, SPRN_SPRG_RSCRATCH2
+	mfspr	r11, SPRN_SPRG_RSCRATCH1
+	mfspr	r10, SPRN_SPRG_RSCRATCH0
 	b	InstructionStorage
 
 #ifdef CONFIG_SPE
@@ -790,12 +790,12 @@
 	tlbwe
 
 	/* Done...restore registers and get out of here.  */
-	mfspr	r11, SPRN_SPRG7R
+	mfspr	r11, SPRN_SPRG_RSCRATCH4
 	mtcr	r11
-	mfspr	r13, SPRN_SPRG5R
-	mfspr	r12, SPRN_SPRG4R
-	mfspr	r11, SPRN_SPRG1
-	mfspr	r10, SPRN_SPRG0
+	mfspr	r13, SPRN_SPRG_RSCRATCH3
+	mfspr	r12, SPRN_SPRG_RSCRATCH2
+	mfspr	r11, SPRN_SPRG_RSCRATCH1
+	mfspr	r10, SPRN_SPRG_RSCRATCH0
 	rfi					/* Force context change */
 
 #ifdef CONFIG_SPE
@@ -839,7 +839,7 @@
 #endif /* !CONFIG_SMP */
 	/* enable use of SPE after return */
 	oris	r9,r9,MSR_SPE@h
-	mfspr	r5,SPRN_SPRG3		/* current task's THREAD (phys) */
+	mfspr	r5,SPRN_SPRG_THREAD	/* current task's THREAD (phys) */
 	li	r4,1
 	li	r10,THREAD_ACC
 	stw	r4,THREAD_USED_SPE(r5)
@@ -1118,7 +1118,7 @@
 
 	/* ptr to current thread */
 	addi	r4,r2,THREAD	/* address of our thread_struct */
-	mtspr	SPRN_SPRG3,r4
+	mtspr	SPRN_SPRG_THREAD,r4
 
 	/* Setup the defaults for TLB entries */
 	li	r4,(MAS4_TSIZED(BOOK3E_PAGESZ_4K))@l
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 1f68160..91b89b8 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -142,11 +142,11 @@
 #define check_smt_enabled()
 #endif /* CONFIG_SMP */
 
-/* Put the paca pointer into r13 and SPRG3 */
+/* Put the paca pointer into r13 and SPRG_PACA */
 void __init setup_paca(int cpu)
 {
 	local_paca = &paca[cpu];
-	mtspr(SPRN_SPRG3, local_paca);
+	mtspr(SPRN_SPRG_PACA, local_paca);
 }
 
 /*
diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S
index ea4d646..67b6916 100644
--- a/arch/powerpc/kernel/vector.S
+++ b/arch/powerpc/kernel/vector.S
@@ -65,7 +65,7 @@
 1:
 	/* enable use of VMX after return */
 #ifdef CONFIG_PPC32
-	mfspr	r5,SPRN_SPRG3		/* current task's THREAD (phys) */
+	mfspr	r5,SPRN_SPRG_THREAD		/* current task's THREAD (phys) */
 	oris	r9,r9,MSR_VEC@h
 #else
 	ld	r4,PACACURRENT(r13)