[ARM] Move ARMv4 wbi functions to separate file

This allows the ARMv4 write buffer + icache entry handling
instructions to be left out of a kernel which doesn't have separate
icache entry handling instructions.

arch/arm/mm/Makefile

@@ -22,24 +22,21 @@ obj-$(CONFIG_DISCONTIGMEM) += discontig.o
 p-$(CONFIG_CPU_26)	+= proc-arm2_3.o
 
 # ARMv3
-p-$(CONFIG_CPU_ARM610)	+= proc-arm6_7.o  tlb-v3.o   copypage-v3.o
-p-$(CONFIG_CPU_ARM710)	+= proc-arm6_7.o  tlb-v3.o   copypage-v3.o
+p-$(CONFIG_CPU_ARM610)	+= proc-arm6_7.o  tlb-v3.o    copypage-v3.o
+p-$(CONFIG_CPU_ARM710)	+= proc-arm6_7.o  tlb-v3.o    copypage-v3.o
 
 # ARMv4
-p-$(CONFIG_CPU_ARM720T)	+= proc-arm720.o  tlb-v4.o   copypage-v4wt.o abort-lv4t.o
-p-$(CONFIG_CPU_ARM920T)	+= proc-arm920.o  tlb-v4wb.o copypage-v4wb.o abort-ev4t.o
-p-$(CONFIG_CPU_ARM922T)	+= proc-arm922.o  tlb-v4wb.o copypage-v4wb.o abort-ev4t.o
-p-$(CONFIG_CPU_ARM1020)	+= proc-arm1020.o tlb-v4wb.o copypage-v4wb.o abort-ev4t.o
-p-$(CONFIG_CPU_SA110)	+= proc-sa110.o   tlb-v4wb.o copypage-v4wb.o abort-ev4.o   minicache.o
-p-$(CONFIG_CPU_SA1100)	+= proc-sa110.o   tlb-v4wb.o copypage-v4mc.o abort-ev4.o   minicache.o
+p-$(CONFIG_CPU_ARM720T)	+= proc-arm720.o  tlb-v4.o    copypage-v4wt.o abort-lv4t.o
+p-$(CONFIG_CPU_ARM920T)	+= proc-arm920.o  tlb-v4wbi.o copypage-v4wb.o abort-ev4t.o
+p-$(CONFIG_CPU_ARM922T)	+= proc-arm922.o  tlb-v4wbi.o copypage-v4wb.o abort-ev4t.o
+p-$(CONFIG_CPU_ARM1020)	+= proc-arm1020.o tlb-v4wbi.o copypage-v4wb.o abort-ev4t.o
+p-$(CONFIG_CPU_SA110)	+= proc-sa110.o   tlb-v4wb.o  copypage-v4wb.o abort-ev4.o   minicache.o
+p-$(CONFIG_CPU_SA1100)	+= proc-sa110.o   tlb-v4wb.o  copypage-v4mc.o abort-ev4.o   minicache.o
 
 # ARMv5
-p-$(CONFIG_CPU_ARM926T)	+= proc-arm926.o  tlb-v4wb.o copypage-v4wb.o abort-ev5tej.o
-p-$(CONFIG_CPU_XSCALE)	+= proc-xscale.o  tlb-v4wb.o copypage-xscale.o abort-xscale.o minicache.o
+p-$(CONFIG_CPU_ARM926T)	+= proc-arm926.o  tlb-v4wbi.o copypage-v4wb.o abort-ev5tej.o
+p-$(CONFIG_CPU_XSCALE)	+= proc-xscale.o  tlb-v4wbi.o copypage-xscale.o abort-xscale.o minicache.o
 
 obj-y		+= $(sort $(p-y))
 
 include $(TOPDIR)/Rules.make
-
-# Special dependencies
-$(obj)/$(p-y):	include/asm-arm/constants.h

arch/arm/mm/tlb-v4wb.S

@@ -7,10 +7,10 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- *  ARM architecture version 4 and version 5 TLB handling functions.
- *  These assume a split I/D TLBs, with a write buffer.
+ *  ARM architecture version 4 TLB handling functions.
+ *  These assume a split I/D TLBs w/o I TLB entry, with a write buffer.
  *
- *  Processors: ARM920 ARM922 ARM926 SA110 SA1100 SA1110 XScale
+ *  Processors: SA110 SA1100 SA1110
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
@@ -67,50 +67,6 @@ ENTRY(v4wb_flush_kern_tlb_range)
 	blo	1b
 	mov	pc, lr
 
-/*
- * These two are optimised for ARM920, ARM922, ARM926, Xscale
- */
-
-/*
- *	v4wb_flush_user_tlb_range(start, end, mm)
- *
- *	Invalidate a range of TLB entries in the specified address space.
- *
- *	- start - range start address
- *	- end   - range end address
- *	- mm    - mm_struct describing address space
- */
-	.align	5
-ENTRY(v4wbi_flush_user_tlb_range)
-	vma_vm_mm ip, r2
-	act_mm	r3				@ get current->active_mm
-	eors	r3, ip, r3			@ == mm ?
-	movne	pc, lr				@ no, we dont do anything
-	mov	r3, #0
-	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
-	vma_vm_flags r2, r2
-	bic	r0, r0, #0x0ff
-	bic	r0, r0, #0xf00
-1:	tst	r2, #VM_EXEC
-	mcrne	p15, 0, r0, c8, c5, 1		@ invalidate I TLB entry
-	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
-	add	r0, r0, #PAGE_SZ
-	cmp	r0, r1
-	blo	1b
-	mov	pc, lr
-
-ENTRY(v4wbi_flush_kern_tlb_range)
-	mov	r3, #0
-	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
-	bic	r0, r0, #0x0ff
-	bic	r0, r0, #0xf00
-1:	mcr	p15, 0, r0, c8, c5, 1		@ invalidate I TLB entry
-	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
-	add	r0, r0, #PAGE_SZ
-	cmp	r0, r1
-	blo	1b
-	mov	pc, lr
-
 	__INIT
 
 	.type	v4wb_tlb_fns, #object
@@ -119,10 +75,3 @@ ENTRY(v4wb_tlb_fns)
 	.long	v4wb_flush_kern_tlb_range
 	.long	v4wb_tlb_flags
 	.size	v4wb_tlb_fns, . - v4wb_tlb_fns
-
-	.type	v4wbi_tlb_fns, #object
-ENTRY(v4wbi_tlb_fns)
-	.long	v4wbi_flush_user_tlb_range
-	.long	v4wbi_flush_kern_tlb_range
-	.long	v4wbi_tlb_flags
-	.size	v4wbi_tlb_fns, . - v4wbi_tlb_fns

arch/arm/mm/tlb-v4wbi.S

+/*
+ *  linux/arch/arm/mm/tlbv4wbi.S
+ *
+ *  Copyright (C) 1997-2002 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  ARM architecture version 4 and version 5 TLB handling functions.
+ *  These assume a split I/D TLBs, with a write buffer.
+ *
+ *  Processors: ARM920 ARM922 ARM926 XScale
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/constants.h>
+#include <asm/tlbflush.h>
+#include "proc-macros.S"
+
+/*
+ *	v4wb_flush_user_tlb_range(start, end, mm)
+ *
+ *	Invalidate a range of TLB entries in the specified address space.
+ *
+ *	- start - range start address
+ *	- end   - range end address
+ *	- mm    - mm_struct describing address space
+ */
+	.align	5
+ENTRY(v4wbi_flush_user_tlb_range)
+	vma_vm_mm ip, r2
+	act_mm	r3				@ get current->active_mm
+	eors	r3, ip, r3			@ == mm ?
+	movne	pc, lr				@ no, we dont do anything
+	mov	r3, #0
+	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
+	vma_vm_flags r2, r2
+	bic	r0, r0, #0x0ff
+	bic	r0, r0, #0xf00
+1:	tst	r2, #VM_EXEC
+	mcrne	p15, 0, r0, c8, c5, 1		@ invalidate I TLB entry
+	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
+	add	r0, r0, #PAGE_SZ
+	cmp	r0, r1
+	blo	1b
+	mov	pc, lr
+
+ENTRY(v4wbi_flush_kern_tlb_range)
+	mov	r3, #0
+	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
+	bic	r0, r0, #0x0ff
+	bic	r0, r0, #0xf00
+1:	mcr	p15, 0, r0, c8, c5, 1		@ invalidate I TLB entry
+	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
+	add	r0, r0, #PAGE_SZ
+	cmp	r0, r1
+	blo	1b
+	mov	pc, lr
+
+	__INIT
+
+	.type	v4wbi_tlb_fns, #object
+ENTRY(v4wbi_tlb_fns)
+	.long	v4wbi_flush_user_tlb_range
+	.long	v4wbi_flush_kern_tlb_range
+	.long	v4wbi_tlb_flags
+	.size	v4wbi_tlb_fns, . - v4wbi_tlb_fns