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From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
	Christoph Hellwig <hch@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	systemtap@sources.redhat.com, ltt-dev@shafik.org
Subject: [PATCH 03/05] Linux Kernel Markers : powerpc optimization
Date: Sun, 11 Feb 2007 15:03:25 -0500	[thread overview]
Message-ID: <1171224208261-git-send-email-mathieu.desnoyers@polymtl.ca> (raw)
In-Reply-To: <1171224207118-git-send-email-mathieu.desnoyers@polymtl.ca>

Linux Kernel Markers : powerpc optimization

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

--- /dev/null
+++ b/include/asm-powerpc/marker.h
@@ -0,0 +1,49 @@
+/*
+ * marker.h
+ *
+ * Code markup for dynamic and static tracing. PowerPC architecture
+ * optimisations.
+ *
+ * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * This file is released under the GPLv2.
+ * See the file COPYING for more details.
+ */
+
+#include <asm/asm-compat.h>
+
+#ifdef CONFIG_MARKERS
+
+#define MARK(name, format, args...) \
+	do { \
+		static marker_probe_func *__mark_call_##name = \
+					__mark_empty_function; \
+		static const struct __mark_marker_c __mark_c_##name \
+			__attribute__((section(".markers.c"))) = \
+			{ #name, &__mark_call_##name, format, \
+			MARKER_OPTIMIZED } ; \
+		char condition; \
+		asm volatile(	".section .markers, \"a\";\n\t" \
+					PPC_LONG "%1, 0f;\n\t" \
+					".previous;\n\t" \
+					".align 4\n\t" \
+					"0:\n\t" \
+					"li %0,0;\n\t" \
+				: "=r" (condition) \
+				: "i" (&__mark_c_##name)); \
+		__mark_check_format(format, ## args); \
+		if (unlikely(condition)) { \
+			preempt_disable(); \
+			(*__mark_call_##name)(format, ## args); \
+			preempt_enable(); \
+		} \
+	} while (0)
+
+
+/* Offset of the immediate value from the start of the addi instruction (result
+ * of the li mnemonic), in bytes. */
+#define MARK_ENABLE_IMMEDIATE_OFFSET 2
+#define MARK_ENABLE_TYPE short
+#define MARK_POLYMORPHIC
+
+#endif

  parent reply	other threads:[~2007-02-11 20:13 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-11 20:03 [PATCH 00/05] Linux Kernel Markers - kernel 2.6.20 Mathieu Desnoyers
2007-02-11 20:03 ` [PATCH 01/05] Linux Kernel Markers : Kconfig menus Mathieu Desnoyers
2007-02-11 20:03 ` [PATCH 02/05] Linux Kernel Markers, architecture independant code Mathieu Desnoyers
2007-02-15  7:21   ` Andrew Morton
2007-02-15 19:12     ` Mathieu Desnoyers
2007-02-11 20:03 ` Mathieu Desnoyers [this message]
2007-02-11 20:03 ` [PATCH 04/05] Linux Kernel Markers : i386 optimization Mathieu Desnoyers
2007-02-11 20:03 ` [PATCH 05/05] Linux Kernel Markers, non optimized architectures Mathieu Desnoyers
2007-02-15  7:16   ` Andrew Morton
2007-02-15 19:09     ` Mathieu Desnoyers
2007-02-16 20:26       ` Karim Yaghmour
2007-02-16 23:38         ` Mathieu Desnoyers
2007-02-21 20:09           ` Karim Yaghmour
2007-02-21 20:45             ` Mathieu Desnoyers
2007-02-21 22:06               ` Karim Yaghmour
2007-02-22  0:18                 ` [PATCH] Linux Kernel Markers - cleanup Mathieu Desnoyers
2007-02-15  7:12 ` [PATCH 00/05] Linux Kernel Markers - kernel 2.6.20 Andrew Morton
2007-02-15 15:28   ` Frank Ch. Eigler
2007-02-15 22:18     ` Andrew Morton
2007-02-15 22:30       ` Mathieu Desnoyers
2007-02-15 23:14       ` Vara Prasad
2007-02-16  1:32   ` Mathieu Desnoyers
2007-02-16  1:33   ` [PATCH] Linux Kernel Markers Documentation Mathieu Desnoyers
2007-02-16  1:45     ` Randy Dunlap
2007-02-16  3:56       ` Mathieu Desnoyers
2007-02-16  4:05       ` [PATCH] Linux Kernel Markers Documentation - fix Mathieu Desnoyers

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