Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752667AbaL2XdZ (ORCPT ); Mon, 29 Dec 2014 18:33:25 -0500 Received: from mail.kmu-office.ch ([178.209.48.109]:41142 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752532AbaL2Xc2 (ORCPT ); Mon, 29 Dec 2014 18:32:28 -0500 From: Stefan Agner To: shawn.guo@linaro.org, kernel@pengutronix.de, linux@arm.linux.org.uk, u.kleine-koenig@pengutronix.de, jason@lakedaemon.net, olof@lixom.net, arnd@arndb.de, daniel.lezcano@linaro.org, tglx@linutronix.de, mark.rutland@arm.com, pawel.moll@arm.com, robh+dt@kernel.org, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, marc.zyngier@arm.com Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Stefan Agner Subject: [PATCH v2 10/12] ARM: vf610: enable Cortex-M4 on Vybrid SoC Date: Tue, 30 Dec 2014 00:32:13 +0100 Message-Id: <1419895935-22966-11-git-send-email-stefan@agner.ch> X-Mailer: git-send-email 2.2.1 In-Reply-To: <1419895935-22966-1-git-send-email-stefan@agner.ch> References: <1419895935-22966-1-git-send-email-stefan@agner.ch> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch allows to build the Kernel for Vybrid (VF6xx) SoC when ARMv7-M CPU is selected. The resulting image runs on the secondary Cortex-M4 core. This core has equally access to all peripherals as the main Cortex-A5 core. However, there is no resource control mechanism, hence when both cores are used simultaneously, orthogonal device tree's are required. The boot CPU is dependent on the SoC variant, however the commonly available boards use variants where the Cortex-A5 is the primary/boot CPU. Booting the secondary Cortex-M4 CPU needs SoC specific register written. There is no in kernel support for this right now, a external userspace utility called "m4boot" can be used to boot the kernel: m4boot xipImage initramfs.cpio.lzo vf610m4-colibri.dtb Signed-off-by: Stefan Agner --- Documentation/devicetree/bindings/arm/fsl.txt | 3 +++ arch/arm/mach-imx/Kconfig | 36 +++++++++++++++++---------- arch/arm/mach-imx/Makefile.boot | 0 arch/arm/mach-imx/mach-vf610.c | 1 + 4 files changed, 27 insertions(+), 13 deletions(-) create mode 100644 arch/arm/mach-imx/Makefile.boot diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt index c830b5b..f396088 100644 --- a/Documentation/devicetree/bindings/arm/fsl.txt +++ b/Documentation/devicetree/bindings/arm/fsl.txt @@ -81,12 +81,15 @@ Freescale Vybrid Platform Device Tree Bindings For the Vybrid SoC familiy all variants with DDR controller are supported, which is the VF5xx and VF6xx series. Out of historical reasons, in most places the kernel uses vf610 to refer to the whole familiy. +The compatible string "fsl,vf610m4" is used for the secondary Cortex-M4 +core support. Required root node compatible property (one of them): - compatible = "fsl,vf500"; - compatible = "fsl,vf510"; - compatible = "fsl,vf600"; - compatible = "fsl,vf610"; + - compatible = "fsl,vf610m4"; Freescale LS1021A Platform Device Tree Bindings ------------------------------------------------ diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index 96c8eb8..4f26942 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -1,5 +1,5 @@ menuconfig ARCH_MXC - bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 + bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 || ARCH_MULTI_V7M select ARCH_REQUIRE_GPIOLIB select ARM_CPU_SUSPEND if PM select CLKSRC_MMIO @@ -558,9 +558,11 @@ config MACH_VPR200 endif +comment "Device tree only" + if ARCH_MULTI_V7 -comment "Device tree only" +comment "Cortex-A platforms" config SOC_IMX5 bool @@ -630,10 +632,28 @@ config SOC_IMX6SX help This enables support for Freescale i.MX6 SoloX processor. + +config SOC_LS1021A + bool "Freescale LS1021A support" + select ARM_GIC + select HAVE_ARM_ARCH_TIMER + select PCI_DOMAINS if PCI + select ZONE_DMA if ARM_LPAE + + help + This enable support for Freescale LS1021A processor. + +endif + +comment "Cortex-A/Cortex-M asymmetric multiprocessing platforms" + +if ARCH_MULTI_V7 || ARCH_MULTI_V7M + config SOC_VF610 bool "Vybrid Family VF610 support" select VF610_MSCM - select ARM_GIC + select ARM_GIC if ARCH_MULTI_V7 + select ARM_NVIC if ARCH_MULTI_V7M select PINCTRL_VF610 select PL310_ERRATA_769419 if CACHE_L2X0 @@ -660,16 +680,6 @@ choice endchoice -config SOC_LS1021A - bool "Freescale LS1021A support" - select ARM_GIC - select HAVE_ARM_ARCH_TIMER - select PCI_DOMAINS if PCI - select ZONE_DMA if ARM_LPAE - - help - This enable support for Freescale LS1021A processor. - endif source "arch/arm/mach-imx/devices/Kconfig" diff --git a/arch/arm/mach-imx/Makefile.boot b/arch/arm/mach-imx/Makefile.boot new file mode 100644 index 0000000..e69de29 diff --git a/arch/arm/mach-imx/mach-vf610.c b/arch/arm/mach-imx/mach-vf610.c index 2e7c75b..b20f6c1 100644 --- a/arch/arm/mach-imx/mach-vf610.c +++ b/arch/arm/mach-imx/mach-vf610.c @@ -17,6 +17,7 @@ static const char * const vf610_dt_compat[] __initconst = { "fsl,vf510", "fsl,vf600", "fsl,vf610", + "fsl,vf610m4", NULL, }; -- 2.2.1 -- 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/