patch-2.4.25 linux-2.4.25/include/asm-mips/hazards.h

• Lines: 50
• Date: 2004-02-18 05:36:32.000000000 -0800
• Orig file: linux-2.4.24/include/asm-mips/hazards.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/include/asm-mips/hazards.h linux-2.4.25/include/asm-mips/hazards.h
@@ -0,0 +1,49 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 Ralf Baechle
+ */
+#ifndef _ASM_HAZARDS_H
+#define _ASM_HAZARDS_H
+
+#include <linux/config.h>
+
+#ifdef __ASSEMBLY__
+
+/*
+ * RM9000 hazards.  When the JTLB is updated by tlbwi or tlbwr, a subsequent
+ * use of the JTLB for instructions should not occur for 4 cpu cycles and use
+ * for data translations should not occur for 3 cpu cycles.
+ */
+#ifdef CONFIG_CPU_RM9000
+#define rm9000_tlb_hazard						\
+	.set	push;							\
+	.set	mips32;							\
+	ssnop; ssnop; ssnop; ssnop;					\
+	.set	pop
+#else
+#define rm9000_tlb_hazard
+#endif
+
+#else
+
+/*
+ * RM9000 hazards.  When the JTLB is updated by tlbwi or tlbwr, a subsequent
+ * use of the JTLB for instructions should not occur for 4 cpu cycles and use
+ * for data translations should not occur for 3 cpu cycles.
+ */
+#ifdef CONFIG_CPU_RM9000
+#define rm9000_tlb_hazard()						\
+	__asm__ __volatile__(						\
+		".set\tmips32\n\t"					\
+		"ssnop; ssnop; ssnop; ssnop\n\t"			\
+		".set\tmips0")
+#else
+#define rm9000_tlb_hazard() do { } while (0)
+#endif
+
+#endif
+
+#endif /* _ASM_HAZARDS_H */