Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750797AbXBKUNv (ORCPT ); Sun, 11 Feb 2007 15:13:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750819AbXBKUNv (ORCPT ); Sun, 11 Feb 2007 15:13:51 -0500 Received: from tomts43-srv.bellnexxia.net ([209.226.175.110]:59219 "EHLO tomts43-srv.bellnexxia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750797AbXBKUNu (ORCPT ); Sun, 11 Feb 2007 15:13:50 -0500 From: Mathieu Desnoyers To: linux-kernel@vger.kernel.org Cc: Andrew Morton , Mathieu Desnoyers , Christoph Hellwig , Ingo Molnar , 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 Message-Id: <1171224208261-git-send-email-mathieu.desnoyers@polymtl.ca> X-Mailer: git-send-email 1.4.4.4 In-Reply-To: <1171224207118-git-send-email-mathieu.desnoyers@polymtl.ca> References: <1171224207118-git-send-email-mathieu.desnoyers@polymtl.ca> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1737 Lines: 61 Linux Kernel Markers : powerpc optimization Signed-off-by: Mathieu Desnoyers --- /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 + * + * This file is released under the GPLv2. + * See the file COPYING for more details. + */ + +#include + +#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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/