From patchwork Wed Dec 17 20:09:26 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Vorontsov X-Patchwork-Id: 14555 X-Patchwork-Delegate: paulus@samba.org Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id C507847E04 for ; Thu, 18 Dec 2008 07:10:50 +1100 (EST) X-Original-To: linuxppc-dev@ozlabs.org Delivered-To: linuxppc-dev@ozlabs.org Received: from buildserver.ru.mvista.com (unknown [85.21.88.6]) by ozlabs.org (Postfix) with ESMTP id C7CB247573 for ; Thu, 18 Dec 2008 07:09:27 +1100 (EST) Received: from localhost (unknown [10.150.0.9]) by buildserver.ru.mvista.com (Postfix) with ESMTP id 91BDC881A; Thu, 18 Dec 2008 01:09:27 +0400 (SAMT) Date: Wed, 17 Dec 2008 23:09:26 +0300 From: Anton Vorontsov To: Paul Mackerras Subject: [PATCH 6/7] powerpc/32: Wire up the trampoline code for kdump Message-ID: <20081217200926.GF4624@oksana.dev.rtsoft.ru> References: <20081217200610.GA31887@oksana.dev.rtsoft.ru> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20081217200610.GA31887@oksana.dev.rtsoft.ru> User-Agent: Mutt/1.5.18 (2008-05-17) Cc: Milton Miller , linuxppc-dev@ozlabs.org X-BeenThere: linuxppc-dev@ozlabs.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org From: Dale Farnsworth Wire up the trampoline code for ppc32 to relay exceptions from the vectors at address 0 to vectors at address 32MB, and modify Kconfig to enable Kdump support for all classic powerpcs. Signed-off-by: Dale Farnsworth Signed-off-by: Anton Vorontsov --- arch/powerpc/Kconfig | 2 +- arch/powerpc/include/asm/kdump.h | 13 +++++++++++++ arch/powerpc/kernel/setup_32.c | 2 ++ 3 files changed, 16 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index be4f99b..f7f5448 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -326,7 +326,7 @@ config KEXEC config CRASH_DUMP bool "Build a kdump crash kernel" - depends on PPC_MULTIPLATFORM && PPC64 && RELOCATABLE + depends on (PPC64 && RELOCATABLE) || 6xx help Build a kernel suitable for use as a kdump capture kernel. The same kernel binary can be used as production kernel and dump diff --git a/arch/powerpc/include/asm/kdump.h b/arch/powerpc/include/asm/kdump.h index b07ebb9..5ebfe5d 100644 --- a/arch/powerpc/include/asm/kdump.h +++ b/arch/powerpc/include/asm/kdump.h @@ -1,6 +1,8 @@ #ifndef _PPC64_KDUMP_H #define _PPC64_KDUMP_H +#include + /* Kdump kernel runs at 32 MB, change at your peril. */ #define KDUMP_KERNELBASE 0x2000000 @@ -11,8 +13,19 @@ #ifdef CONFIG_CRASH_DUMP +/* + * On PPC64 translation is disabled during trampoline setup, so we use + * physical addresses. Though on PPC32 translation is already enabled, + * so we can't do the same. Luckily create_trampoline() creates relative + * branches, so we can just add the PAGE_OFFSET and don't worry about it. + */ +#ifdef __powerpc64__ #define KDUMP_TRAMPOLINE_START 0x0100 #define KDUMP_TRAMPOLINE_END 0x3000 +#else +#define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET) +#define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET) +#endif /* __powerpc64__ */ #define KDUMP_MIN_TCE_ENTRIES 2048 diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 086c23c..9ca1d2b 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -121,6 +121,8 @@ notrace void __init machine_init(unsigned long dt_ptr) probe_machine(); + setup_kdump_trampoline(); + #ifdef CONFIG_6xx if (cpu_has_feature(CPU_FTR_CAN_DOZE) || cpu_has_feature(CPU_FTR_CAN_NAP))