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* [PATCH 20/30] loongson: Flush RAS and BTB for CPU predictively execution
@ 2009-05-15 22:19 Wu Zhangjin
  2009-05-15 22:19 ` Wu Zhangjin
  0 siblings, 1 reply; 2+ messages in thread
From: Wu Zhangjin @ 2009-05-15 22:19 UTC (permalink / raw)
  To: linux-mips, Ralf Baechle
  Cc: Arnaud Patard, loongson-dev, zhangfx, yanh, Philippe Vachon,
	Zhang Le, Erwan Lerale

>From b023ba02ea5c0983ffb33ff486b3b4f8b5d972e6 Mon Sep 17 00:00:00 2001
From: Wu Zhangjin <wuzhangjin@gmail.com>
Date: Sat, 16 May 2009 04:32:13 +0800
Subject: [PATCH 20/30] loongson: Flush RAS and BTB for CPU predictively
execution

---
 arch/mips/include/asm/stackframe.h |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/mips/include/asm/stackframe.h
b/arch/mips/include/asm/stackframe.h
index db0fa7b..204286e 100644
--- a/arch/mips/include/asm/stackframe.h
+++ b/arch/mips/include/asm/stackframe.h
@@ -117,6 +117,24 @@
 		.endm
 #else
 		.macro	get_saved_sp	/* Uniprocessor variation */
+#ifdef CONFIG_CPU_LOONGSON2
+		move k0,ra
+		jal 2008f
+		nop
+		2008:
+		jal 2008f
+		nop
+		2008:
+		jal 2008f
+		nop
+		2008:
+		jal 2008f
+		nop
+		2008:
+		move ra,k0
+		li k0,3
+		mtc0 k0,$22
+#endif
 #if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
 		lui	k1, %hi(kernelsp)
 #else
-- 
1.6.2.1

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