Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 77 insertions, 0 deletions

diff --git a/arch/arm/mm/tlb-v4wb.S b/arch/arm/mm/tlb-v4wb.S
new file mode 100644
index 00000000000..7908d5f1f13
--- /dev/null
+++ b/arch/arm/mm/tlb-v4wb.S
@@ -0,0 +1,77 @@
+/*
+ *  linux/arch/arm/mm/tlbv4wb.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 TLB handling functions.
+ *  These assume a split I/D TLBs w/o I TLB entry, with a write buffer.
+ *
+ *  Processors: SA110 SA1100 SA1110
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/constants.h>
+#include <asm/tlbflush.h>
+#include "proc-macros.S"
+
+	.align	5
+/*
+ *	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(v4wb_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
+	vma_vm_flags r2, r2
+	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
+	tst	r2, #VM_EXEC
+	mcrne	p15, 0, r3, c8, c5, 0		@ invalidate I TLB
+	bic	r0, r0, #0x0ff
+	bic	r0, r0, #0xf00
+1:	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
+	add	r0, r0, #PAGE_SZ
+	cmp	r0, r1
+	blo	1b
+	mov	pc, lr
+
+/*
+ *	v4_flush_kern_tlb_range(start, end)
+ *
+ *	Invalidate a range of TLB entries in the specified kernel
+ *	address range.
+ *
+ *	- start - virtual address (may not be aligned)
+ *	- end   - virtual address (may not be aligned)
+ */
+ENTRY(v4wb_flush_kern_tlb_range)
+	mov	r3, #0
+	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
+	bic	r0, r0, #0x0ff
+	bic	r0, r0, #0xf00
+	mcr	p15, 0, r3, c8, c5, 0		@ invalidate I TLB
+1:	mcr	p15, 0, r0, c8, c6, 1		@ invalidate D TLB entry
+	add	r0, r0, #PAGE_SZ
+	cmp	r0, r1
+	blo	1b
+	mov	pc, lr
+
+	__INITDATA
+
+	.type	v4wb_tlb_fns, #object
+ENTRY(v4wb_tlb_fns)
+	.long	v4wb_flush_user_tlb_range
+	.long	v4wb_flush_kern_tlb_range
+	.long	v4wb_tlb_flags
+	.size	v4wb_tlb_fns, . - v4wb_tlb_fns