From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1ewosA-00067o-DT for barebox@lists.infradead.org; Fri, 16 Mar 2018 12:54:47 +0000 From: Sascha Hauer Date: Fri, 16 Mar 2018 13:53:41 +0100 Message-Id: <20180316125354.23462-66-s.hauer@pengutronix.de> In-Reply-To: <20180316125354.23462-1-s.hauer@pengutronix.de> References: <20180316125354.23462-1-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 65/78] ARM: aarch64: implement ignoring data aborts To: Barebox List Data aborts can be masked using the data_abort_mask() function. Add the missing pieces for functionality on aarch64 so that the 'md' command is safe to call even with faulting addresses. Signed-off-by: Sascha Hauer --- arch/arm/cpu/interrupts_64.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/arm/cpu/interrupts_64.c b/arch/arm/cpu/interrupts_64.c index ee3dc3380b..32c8dfcb2d 100644 --- a/arch/arm/cpu/interrupts_64.c +++ b/arch/arm/cpu/interrupts_64.c @@ -143,8 +143,18 @@ void do_bad_error(struct pt_regs *pt_regs) do_exception(pt_regs); } +extern volatile int arm_ignore_data_abort; +extern volatile int arm_data_abort_occurred; + void do_sync(struct pt_regs *pt_regs, unsigned int esr, unsigned long far) { + if ((esr >> ESR_ELx_EC_SHIFT) == ESR_ELx_EC_DABT_CUR && + arm_ignore_data_abort) { + arm_data_abort_occurred = 1; + pt_regs->elr += 4; + return; + } + printf("%s exception at 0x%016lx\n", esr_get_class_string(esr), far); do_exception(pt_regs); } @@ -156,9 +166,6 @@ void do_error(struct pt_regs *pt_regs) do_exception(pt_regs); } -extern volatile int arm_ignore_data_abort; -extern volatile int arm_data_abort_occurred; - void data_abort_mask(void) { arm_data_abort_occurred = 0; -- 2.16.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox