From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001
From: Srikant Patnaik
Date: Sun, 11 Jan 2015 12:28:04 +0530
Subject: Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
---
 arch/arm/mm/abort-ev4.S | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 arch/arm/mm/abort-ev4.S

(limited to 'arch/arm/mm/abort-ev4.S')

diff --git a/arch/arm/mm/abort-ev4.S b/arch/arm/mm/abort-ev4.S
new file mode 100644
index 00000000..54473cd4
--- /dev/null
+++ b/arch/arm/mm/abort-ev4.S
@@ -0,0 +1,25 @@
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+/*
+ * Function: v4_early_abort
+ *
+ * Params  : r2 = pt_regs
+ *	   : r4 = aborted context pc
+ *	   : r5 = aborted context psr
+ *
+ * Returns : r4 - r11, r13 preserved
+ *
+ * Purpose : obtain information about current aborted instruction.
+ * Note: we read user space.  This means we might cause a data
+ * abort here if the I-TLB and D-TLB aren't seeing the same
+ * picture.  Unfortunately, this does happen.  We live with it.
+ */
+	.align	5
+ENTRY(v4_early_abort)
+	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
+	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
+	ldr	r3, [r4]			@ read aborted ARM instruction
+	bic	r1, r1, #1 << 11 | 1 << 10	@ clear bits 11 and 10 of FSR
+	tst	r3, #1 << 20			@ L = 1 -> write?
+	orreq	r1, r1, #1 << 11		@ yes.
+	b	do_DataAbort
-- 
cgit