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/powerpc/kernel/idle_book3e.S | 73 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 arch/powerpc/kernel/idle_book3e.S

(limited to 'arch/powerpc/kernel/idle_book3e.S')

diff --git a/arch/powerpc/kernel/idle_book3e.S b/arch/powerpc/kernel/idle_book3e.S
new file mode 100644
index 00000000..ff007b59
--- /dev/null
+++ b/arch/powerpc/kernel/idle_book3e.S
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2010 IBM Corp, Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *
+ * Generic idle routine for Book3E processors
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/threads.h>
+#include <asm/reg.h>
+#include <asm/ppc_asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/ppc-opcode.h>
+#include <asm/processor.h>
+#include <asm/thread_info.h>
+
+/* 64-bit version only for now */
+#ifdef CONFIG_PPC64
+
+_GLOBAL(book3e_idle)
+	/* Save LR for later */
+	mflr	r0
+	std	r0,16(r1)
+
+	/* Hard disable interrupts */
+	wrteei	0
+
+	/* Now check if an interrupt came in while we were soft disabled
+	 * since we may otherwise lose it (doorbells etc...).
+	 */
+	lbz	r3,PACAIRQHAPPENED(r13)
+	cmpwi	cr0,r3,0
+	bnelr
+
+	/* Now we are going to mark ourselves as soft and hard enabled in
+	 * order to be able to take interrupts while asleep. We inform lockdep
+	 * of that. We don't actually turn interrupts on just yet tho.
+	 */
+#ifdef CONFIG_TRACE_IRQFLAGS
+	stdu    r1,-128(r1)
+	bl	.trace_hardirqs_on
+	addi    r1,r1,128
+#endif
+	li	r0,1
+	stb	r0,PACASOFTIRQEN(r13)
+	
+	/* Interrupts will make use return to LR, so get something we want
+	 * in there
+	 */
+	bl	1f
+
+	/* And return (interrupts are on) */
+	ld	r0,16(r1)
+	mtlr	r0
+	blr
+
+1:	/* Let's set the _TLF_NAPPING flag so interrupts make us return
+	 * to the right spot
+	*/
+	clrrdi	r11,r1,THREAD_SHIFT
+	ld	r10,TI_LOCAL_FLAGS(r11)
+	ori	r10,r10,_TLF_NAPPING
+	std	r10,TI_LOCAL_FLAGS(r11)
+
+	/* We can now re-enable hard interrupts and go to sleep */
+	wrteei	1
+1:	PPC_WAIT(0)
+	b	1b
+
+#endif /* CONFIG_PPC64 */
-- 
cgit