From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 27 Jun 2025 16:20:02 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uV9vu-00BeEK-29 for lore@lore.pengutronix.de; Fri, 27 Jun 2025 16:20:02 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uV9vt-0004EO-FT for lore@pengutronix.de; Fri, 27 Jun 2025 16:20:02 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:To:In-Reply-To:References: Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5yA9BY8PrwZR3Rcq9/N3rpep/bQXWWpIukdBnWe01Pc=; b=CR/bjxceAJyKN+ycplwn8isVWh EDWUOpHZcssdGTju4B1dznlDZgcr2Wjor0TyFA7xLM/2GBsHT4HborxFv3BZ0gBbRjRw+nghpyUvQ yDAzhu8Xi3um6bq1Kf6Mp0bcdZAsJFLigXCZ8Tbq5E5S5VwM96xHPlmBBXSS+ft7OVDgroODeYYK3 j+Mnl68yn/QeJQhZM6qVVdSzKPOawaD5VDHJxyCTd7+PKdy6HYubuUxG5W4vvACi3S3NFs8LjbDjr GDSlRX9iNmnTdMO9uH0l8iwdX+L79gmu9Yy6sYQa6M1Y+AadAOFlLvClnSmAWGz43i0yMqrgiUvGg CqY5VwYg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uV9vR-0000000Et0r-0XRb; Fri, 27 Jun 2025 14:19:33 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uV9kJ-0000000ErWW-3IuD for barebox@lists.infradead.org; Fri, 27 Jun 2025 14:08:06 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uV9kH-0004vO-8k; Fri, 27 Jun 2025 16:08:01 +0200 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uV9kG-005dAc-2s; Fri, 27 Jun 2025 16:08:00 +0200 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1uV9kG-004uPv-2S; Fri, 27 Jun 2025 16:08:00 +0200 From: Sascha Hauer Date: Fri, 27 Jun 2025 16:07:55 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250627-arm-optee-early-helper-v1-9-4b098e8ac7cd@pengutronix.de> References: <20250627-arm-optee-early-helper-v1-0-4b098e8ac7cd@pengutronix.de> In-Reply-To: <20250627-arm-optee-early-helper-v1-0-4b098e8ac7cd@pengutronix.de> To: BAREBOX X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1751033280; l=2032; i=s.hauer@pengutronix.de; s=20230412; h=from:subject:message-id; bh=WsikfYU90sP5bUmzF7zks7IhSH7bvMBnNOUOJJeY0QQ=; b=EnymppJOP4k92ZrcQGtNhRlWtfItthjLcQtJFOVbbu4DEQMgxfkNsc4r8vqXwZYby0/fgzU4m tcIbWxYAMWHCwfm/4tZE08lJcSnMxUhDATW3s9qPXpISVLAuh7cbO/2 X-Developer-Key: i=s.hauer@pengutronix.de; a=ed25519; pk=4kuc9ocmECiBJKWxYgqyhtZOHj5AWi7+d0n/UjhkwTg= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250627_070803_853638_CC999C0F X-CRM114-Status: GOOD ( 10.30 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.3 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 09/14] ARM: i.MX: add imx6_can_access_tzasc() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On ARMv7 there is no direct way to detect if we are in the secure or non secure world. Add a imx6_can_access_tzasc() for this purpose. When accessing the TZASC triggers a data abort then we are in the non secure world. This function can be used later to detect if we have to load OP-TEE or not. Signed-off-by: Sascha Hauer --- arch/arm/mach-imx/tzasc.c | 16 ++++++++++++++++ include/mach/imx/tzasc.h | 1 + 2 files changed, 17 insertions(+) diff --git a/arch/arm/mach-imx/tzasc.c b/arch/arm/mach-imx/tzasc.c index ed20ad8803a2e91b67b5d8c3ab1a4265c4228ec7..63f01cbaa6d4a8fbf47b9683ca840ee64f908cfc 100644 --- a/arch/arm/mach-imx/tzasc.c +++ b/arch/arm/mach-imx/tzasc.c @@ -13,6 +13,8 @@ #include #include #include +#include +#include /******************************************************************************* * TZC380 defines @@ -329,6 +331,20 @@ bool imx6ul_tzc380_is_bypassed(void) return !(readl(&gpr[9]) & MX6_GPR_TZASC1_EN); } +bool imx6_can_access_tzasc(void) +{ + if (!IS_ENABLED(CONFIG_ARM_EXCEPTIONS_PBL)) + panic("%s only works with CONFIG_ARM_EXCEPTIONS_PBL\n", __func__); + + arm_pbl_init_exceptions(); + + data_abort_mask(); + + readl(IOMEM(MX6_TZASC1_BASE)); + + return !data_abort_unmask(); +} + void imx8m_tzc380_init(void) { u32 __iomem *gpr = IOMEM(MX8M_IOMUXC_GPR_BASE_ADDR); diff --git a/include/mach/imx/tzasc.h b/include/mach/imx/tzasc.h index 0fbcdc2150e63864366a8dddeed2d1b97685903d..ca85704a8f459ab6e0cdc975940d855929f3d6f7 100644 --- a/include/mach/imx/tzasc.h +++ b/include/mach/imx/tzasc.h @@ -10,6 +10,7 @@ void imx6q_tzc380_early_ns_region1(void); void imx6ul_tzc380_early_ns_region1(void); bool imx6q_tzc380_is_bypassed(void); bool imx6ul_tzc380_is_bypassed(void); +bool imx6_can_access_tzasc(void); void imx8m_tzc380_init(void); bool imx8m_tzc380_is_enabled(void); -- 2.39.5