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-ev7.S | 51 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 arch/arm/mm/abort-ev7.S

(limited to 'arch/arm/mm/abort-ev7.S')

diff --git a/arch/arm/mm/abort-ev7.S b/arch/arm/mm/abort-ev7.S
new file mode 100644
index 00000000..70337527
--- /dev/null
+++ b/arch/arm/mm/abort-ev7.S
@@ -0,0 +1,51 @@
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+/*
+ * Function: v7_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.
+ */
+	.align	5
+ENTRY(v7_early_abort)
+	/*
+	 * The effect of data aborts on on the exclusive access monitor are
+	 * UNPREDICTABLE. Do a CLREX to clear the state
+	 */
+	clrex
+
+	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
+	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
+
+	/*
+	 * V6 code adjusts the returned DFSR.
+	 * New designs should not need to patch up faults.
+	 */
+
+#if defined(CONFIG_VERIFY_PERMISSION_FAULT)
+	/*
+	 * Detect erroneous permission failures and fix
+	 */
+	ldr	r3, =0x40d			@ On permission fault
+	and	r3, r1, r3
+	cmp	r3, #0x0d
+	bne	do_DataAbort
+
+	mcr	p15, 0, r0, c7, c8, 0   	@ Retranslate FAR
+	isb
+	mrc	p15, 0, ip, c7, c4, 0   	@ Read the PAR
+	and	r3, ip, #0x7b   		@ On translation fault
+	cmp	r3, #0x0b
+	bne	do_DataAbort
+	bic	r1, r1, #0xf			@ Fix up FSR FS[5:0]
+	and	ip, ip, #0x7e
+	orr	r1, r1, ip, LSR #1
+#endif
+
+	b	do_DataAbort
+ENDPROC(v7_early_abort)
-- 
cgit