3 files changed, 15 insertions, 39 deletions

diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 6b7fcbd3f6f1..34f44d8be00d 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -374,6 +374,7 @@ ENTRY(alt_dtlb_miss)
 	movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
 	mov r21=cr.ipsr
 	mov r31=pr
+	mov r24=PERCPU_ADDR
 	;;
 #ifdef CONFIG_DISABLE_VHPT
 	shr.u r22=r16,61			// get the region number into r21
@@ -386,22 +387,30 @@ ENTRY(alt_dtlb_miss)
 (p8)	mov r29=b0				// save b0
 (p8)	br.cond.dptk dtlb_fault
 #endif
+	cmp.ge p10,p11=r16,r24			// access to per_cpu_data?
+	tbit.z p12,p0=r16,61			// access to region 6?
+	mov r25=PERCPU_PAGE_SHIFT << 2
+	mov r26=PERCPU_PAGE_SIZE
+	nop.m 0
+	nop.b 0
+	;;
+(p10)	mov r19=IA64_KR(PER_CPU_DATA)
+(p11)	and r19=r19,r16				// clear non-ppn fields
 	extr.u r23=r21,IA64_PSR_CPL0_BIT,2	// extract psr.cpl
 	and r22=IA64_ISR_CODE_MASK,r20		// get the isr.code field
 	tbit.nz p6,p7=r20,IA64_ISR_SP_BIT	// is speculation bit on?
-	shr.u r18=r16,57			// move address bit 61 to bit 4
-	and r19=r19,r16				// clear ed, reserved bits, and PTE control bits
 	tbit.nz p9,p0=r20,IA64_ISR_NA_BIT	// is non-access bit on?
 	;;
-	andcm r18=0x10,r18	// bit 4=~address-bit(61)
+(p10)	sub r19=r19,r26
+(p10)	mov cr.itir=r25
 	cmp.ne p8,p0=r0,r23
 (p9)	cmp.eq.or.andcm p6,p7=IA64_ISR_CODE_LFETCH,r22	// check isr.code field
+(p12)	dep r17=-1,r17,4,1			// set ma=UC for region 6 addr
 (p8)	br.cond.spnt page_fault
 
 	dep r21=-1,r21,IA64_PSR_ED_BIT,1
-	or r19=r19,r17		// insert PTE control bits into r19
 	;;
-	or r19=r19,r18		// set bit 4 (uncached) if the access was to region 6
+	or r19=r19,r17		// insert PTE control bits into r19
 (p6)	mov cr.ipsr=r21
 	;;
 (p7)	itc.d r19		// insert the TLB entry
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index c6b607c00dee..8c9c26aa6ae0 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -101,14 +101,6 @@ ia64_do_tlb_purge:
 	;;
 	srlz.d
 	;;
-	// 2. Purge DTR for PERCPU data.
-	movl r16=PERCPU_ADDR
-	mov r18=PERCPU_PAGE_SHIFT<<2
-	;;
-	ptr.d r16,r18
-	;;
-	srlz.d
-	;;
 	// 3. Purge ITR for PAL code.
 	GET_THIS_PADDR(r2, ia64_mca_pal_base)
 	;;
@@ -196,22 +188,6 @@ ia64_reload_tr:
 	srlz.i
 	srlz.d
 	;;
-	// 2. Reload DTR register for PERCPU data.
-	GET_THIS_PADDR(r2, ia64_mca_per_cpu_pte)
-	;;
-	movl r16=PERCPU_ADDR		// vaddr
-	movl r18=PERCPU_PAGE_SHIFT<<2
-	;;
-	mov cr.itir=r18
-	mov cr.ifa=r16
-	;;
-	ld8 r18=[r2]			// load per-CPU PTE
-	mov r16=IA64_TR_PERCPU_DATA;
-	;;
-	itr.d dtr[r16]=r18
-	;;
-	srlz.d
-	;;
 	// 3. Reload ITR for PAL code.
 	GET_THIS_PADDR(r2, ia64_mca_pal_pte)
 	;;
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 1373fae7657f..07d82cd7cbdd 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -337,7 +337,7 @@ setup_gate (void)
 void __devinit
 ia64_mmu_init (void *my_cpu_data)
 {
-	unsigned long psr, pta, impl_va_bits;
+	unsigned long pta, impl_va_bits;
 	extern void __devinit tlb_init (void);
 
 #ifdef CONFIG_DISABLE_VHPT
@@ -346,15 +346,6 @@ ia64_mmu_init (void *my_cpu_data)
 #	define VHPT_ENABLE_BIT	1
 #endif
 
-	/* Pin mapping for percpu area into TLB */
-	psr = ia64_clear_ic();
-	ia64_itr(0x2, IA64_TR_PERCPU_DATA, PERCPU_ADDR,
-		 pte_val(pfn_pte(__pa(my_cpu_data) >> PAGE_SHIFT, PAGE_KERNEL)),
-		 PERCPU_PAGE_SHIFT);
-
-	ia64_set_psr(psr);
-	ia64_srlz_i();
-
 	/*
 	 * Check if the virtually mapped linear page table (VMLPT) overlaps with a mapped
 	 * address space.  The IA-64 architecture guarantees that at least 50 bits of